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         unsigned long valid;
 146         struct cdrom_info *info = drive->driver_data;
 147
 148         if (!cdrom_log_sense(drive, failed_command, sense))
 149                 return;
 150
 151         /*
 152          * If a read toc is executed for a CD-R or CD-RW medium where the first
 153          * toc has not been recorded yet, it will fail with 05/24/00 (which is a
 154          * confusing error)
 155          */
 156         if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
 157                 if (sense->sense_key == 0x05 && sense->asc == 0x24)
 158                         return;
 159
 160         /* current error */
 161         if (sense->error_code == 0x70) {
 162                 switch (sense->sense_key) {
 163                 case MEDIUM_ERROR:
 164                 case VOLUME_OVERFLOW:
 165                 case ILLEGAL_REQUEST:
 166                         if (!sense->valid)
 167                                 break;
 168                         if (failed_command == NULL ||
 169                                         !blk_fs_request(failed_command))
 170                                 break;
 171                         sector = (sense->information[0] << 24) |
 172                                  (sense->information[1] << 16) |
 173                                  (sense->information[2] <<  8) |
 174                                  (sense->information[3]);
 175
 176                         bio_sectors = bio_sectors(failed_command->bio);
 177                         if (bio_sectors < 4)
 178                                 bio_sectors = 4;
 179                         if (drive->queue->hardsect_size == 2048)
 180                                 /* device sector size is 2K */
 181                                 sector <<= 2;
 182                         sector &= ~(bio_sectors - 1);
 183                         valid = (sector - failed_command->sector) << 9;
 184
 185                         if (sector < get_capacity(info->disk) &&
 186                             drive->probed_capacity - sector < 4 * 75)
 187                                 set_capacity(info->disk, sector);
 188                 }
 189         }
 190
 191         ide_cd_log_error(drive->name, failed_command, sense);
 192 }
 193
 194 /* Initialize a ide-cd packet command request */
 195 void ide_cd_init_rq(ide_drive_t *drive, struct request *rq)
 196 {
 197         struct cdrom_info *cd = drive->driver_data;
 198
 199         ide_init_drive_cmd(rq);
 200         rq->cmd_type = REQ_TYPE_ATA_PC;
 201         rq->rq_disk = cd->disk;
 202 }
 203
 204 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
 205                                       struct request *failed_command)
 206 {
 207         struct cdrom_info *info         = drive->driver_data;
 208         struct request *rq              = &info->request_sense_request;
 209
 210         if (sense == NULL)
 211                 sense = &info->sense_data;
 212
 213         /* stuff the sense request in front of our current request */
 214         ide_cd_init_rq(drive, rq);
 215
 216         rq->data = sense;
 217         rq->cmd[0] = GPCMD_REQUEST_SENSE;
 218         rq->cmd[4] = 18;
 219         rq->data_len = 18;
 220
 221         rq->cmd_type = REQ_TYPE_SENSE;
 222
 223         /* NOTE! Save the failed command in "rq->buffer" */
 224         rq->buffer = (void *) failed_command;
 225
 226         (void) ide_do_drive_cmd(drive, rq, ide_preempt);
 227 }
 228
 229 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
 230 {
 231         struct request *rq = HWGROUP(drive)->rq;
 232         int nsectors = rq->hard_cur_sectors;
 233
 234         if (blk_sense_request(rq) && uptodate) {
 235                 /*
 236                  * For REQ_TYPE_SENSE, "rq->buffer" points to the original
 237                  * failed request
 238                  */
 239                 struct request *failed = (struct request *) rq->buffer;
 240                 struct cdrom_info *info = drive->driver_data;
 241                 void *sense = &info->sense_data;
 242                 unsigned long flags;
 243
 244                 if (failed) {
 245                         if (failed->sense) {
 246                                 sense = failed->sense;
 247                                 failed->sense_len = rq->sense_len;
 248                         }
 249                         cdrom_analyze_sense_data(drive, failed, sense);
 250                         /*
 251                          * now end the failed request
 252                          */
 253                         if (blk_fs_request(failed)) {
 254                                 if (ide_end_dequeued_request(drive, failed, 0,
 255                                                 failed->hard_nr_sectors))
 256                                         BUG();
 257                         } else {
 258                                 spin_lock_irqsave(&ide_lock, flags);
 259                                 if (__blk_end_request(failed, -EIO,
 260                                                       failed->data_len))
 261                                         BUG();
 262                                 spin_unlock_irqrestore(&ide_lock, flags);
 263                         }
 264                 } else
 265                         cdrom_analyze_sense_data(drive, NULL, sense);
 266         }
 267
 268         if (!rq->current_nr_sectors && blk_fs_request(rq))
 269                 uptodate = 1;
 270         /* make sure it's fully ended */
 271         if (blk_pc_request(rq))
 272                 nsectors = (rq->data_len + 511) >> 9;
 273         if (!nsectors)
 274                 nsectors = 1;
 275
 276         ide_end_request(drive, uptodate, nsectors);
 277 }
 278
 279 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
 280 {
 281         if (st & 0x80)
 282                 return;
 283         ide_dump_status(drive, msg, st);
 284 }
 285
 286 /*
 287  * Returns:
 288  * 0: if the request should be continued.
 289  * 1: if the request was ended.
 290  */
 291 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
 292 {
 293         struct request *rq = HWGROUP(drive)->rq;
 294         int stat, err, sense_key;
 295
 296         /* check for errors */
 297         stat = ide_read_status(drive);
 298
 299         if (stat_ret)
 300                 *stat_ret = stat;
 301
 302         if (OK_STAT(stat, good_stat, BAD_R_STAT))
 303                 return 0;
 304
 305         /* get the IDE error register */
 306         err = ide_read_error(drive);
 307         sense_key = err >> 4;
 308
 309         if (rq == NULL) {
 310                 printk(KERN_ERR "%s: missing rq in %s\n",
 311                                 drive->name, __func__);
 312                 return 1;
 313         }
 314
 315         if (blk_sense_request(rq)) {
 316                 /*
 317                  * We got an error trying to get sense info from the drive
 318                  * (probably while trying to recover from a former error).
 319                  * Just give up.
 320                  */
 321                 rq->cmd_flags |= REQ_FAILED;
 322                 cdrom_end_request(drive, 0);
 323                 ide_error(drive, "request sense failure", stat);
 324                 return 1;
 325
 326         } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
 327                 /* All other functions, except for READ. */
 328
 329                 /*
 330                  * if we have an error, pass back CHECK_CONDITION as the
 331                  * scsi status byte
 332                  */
 333                 if (blk_pc_request(rq) && !rq->errors)
 334                         rq->errors = SAM_STAT_CHECK_CONDITION;
 335
 336                 /* check for tray open */
 337                 if (sense_key == NOT_READY) {
 338                         cdrom_saw_media_change(drive);
 339                 } else if (sense_key == UNIT_ATTENTION) {
 340                         /* check for media change */
 341                         cdrom_saw_media_change(drive);
 342                         return 0;
 343                 } else if (sense_key == ILLEGAL_REQUEST &&
 344                            rq->cmd[0] == GPCMD_START_STOP_UNIT) {
 345                         /*
 346                          * Don't print error message for this condition--
 347                          * SFF8090i indicates that 5/24/00 is the correct
 348                          * response to a request to close the tray if the
 349                          * drive doesn't have that capability.
 350                          * cdrom_log_sense() knows this!
 351                          */
 352                 } else if (!(rq->cmd_flags & REQ_QUIET)) {
 353                         /* otherwise, print an error */
 354                         ide_dump_status(drive, "packet command error", stat);
 355                 }
 356
 357                 rq->cmd_flags |= REQ_FAILED;
 358
 359                 /*
 360                  * instead of playing games with moving completions around,
 361                  * remove failed request completely and end it when the
 362                  * request sense has completed
 363                  */
 364                 goto end_request;
 365
 366         } else if (blk_fs_request(rq)) {
 367                 int do_end_request = 0;
 368
 369                 /* handle errors from READ and WRITE requests */
 370
 371                 if (blk_noretry_request(rq))
 372                         do_end_request = 1;
 373
 374                 if (sense_key == NOT_READY) {
 375                         /* tray open */
 376                         if (rq_data_dir(rq) == READ) {
 377                                 cdrom_saw_media_change(drive);
 378
 379                                 /* fail the request */
 380                                 printk(KERN_ERR "%s: tray open\n", drive->name);
 381                                 do_end_request = 1;
 382                         } else {
 383                                 struct cdrom_info *info = drive->driver_data;
 384
 385                                 /*
 386                                  * Allow the drive 5 seconds to recover, some
 387                                  * devices will return this error while flushing
 388                                  * data from cache.
 389                                  */
 390                                 if (!rq->errors)
 391                                         info->write_timeout = jiffies +
 392                                                         ATAPI_WAIT_WRITE_BUSY;
 393                                 rq->errors = 1;
 394                                 if (time_after(jiffies, info->write_timeout))
 395                                         do_end_request = 1;
 396                                 else {
 397                                         unsigned long flags;
 398
 399                                         /*
 400                                          * take a breather relying on the unplug
 401                                          * timer to kick us again
 402                                          */
 403                                         spin_lock_irqsave(&ide_lock, flags);
 404                                         blk_plug_device(drive->queue);
 405                                         spin_unlock_irqrestore(&ide_lock,
 406                                                                 flags);
 407                                         return 1;
 408                                 }
 409                         }
 410                 } else if (sense_key == UNIT_ATTENTION) {
 411                         /* media change */
 412                         cdrom_saw_media_change(drive);
 413
 414                         /*
 415                          * Arrange to retry the request but be sure to give up
 416                          * if we've retried too many times.
 417                          */
 418                         if (++rq->errors > ERROR_MAX)
 419                                 do_end_request = 1;
 420                 } else if (sense_key == ILLEGAL_REQUEST ||
 421                            sense_key == DATA_PROTECT) {
 422                         /*
 423                          * No point in retrying after an illegal request or data
 424                          * protect error.
 425                          */
 426                         ide_dump_status_no_sense(drive, "command error", stat);
 427                         do_end_request = 1;
 428                 } else if (sense_key == MEDIUM_ERROR) {
 429                         /*
 430                          * No point in re-trying a zillion times on a bad
 431                          * sector. If we got here the error is not correctable.
 432                          */
 433                         ide_dump_status_no_sense(drive,
 434                                                  "media error (bad sector)",
 435                                                  stat);
 436                         do_end_request = 1;
 437                 } else if (sense_key == BLANK_CHECK) {
 438                         /* disk appears blank ?? */
 439                         ide_dump_status_no_sense(drive, "media error (blank)",
 440                                                  stat);
 441                         do_end_request = 1;
 442                 } else if ((err & ~ABRT_ERR) != 0) {
 443                         /* go to the default handler for other errors */
 444                         ide_error(drive, "cdrom_decode_status", stat);
 445                         return 1;
 446                 } else if ((++rq->errors > ERROR_MAX)) {
 447                         /* we've racked up too many retries, abort */
 448                         do_end_request = 1;
 449                 }
 450
 451                 /*
 452                  * End a request through request sense analysis when we have
 453                  * sense data. We need this in order to perform end of media
 454                  * processing.
 455                  */
 456                 if (do_end_request)
 457                         goto end_request;
 458
 459                 /*
 460                  * If we got a CHECK_CONDITION status, queue
 461                  * a request sense command.
 462                  */
 463                 if (stat & ERR_STAT)
 464                         cdrom_queue_request_sense(drive, NULL, NULL);
 465         } else {
 466                 blk_dump_rq_flags(rq, "ide-cd: bad rq");
 467                 cdrom_end_request(drive, 0);
 468         }
 469
 470         /* retry, or handle the next request */
 471         return 1;
 472
 473 end_request:
 474         if (stat & ERR_STAT) {
 475                 unsigned long flags;
 476
 477                 spin_lock_irqsave(&ide_lock, flags);
 478                 blkdev_dequeue_request(rq);
 479                 HWGROUP(drive)->rq = NULL;
 480                 spin_unlock_irqrestore(&ide_lock, flags);
 481
 482                 cdrom_queue_request_sense(drive, rq->sense, rq);
 483         } else
 484                 cdrom_end_request(drive, 0);
 485
 486         return 1;
 487 }
 488
 489 static int cdrom_timer_expiry(ide_drive_t *drive)
 490 {
 491         struct request *rq = HWGROUP(drive)->rq;
 492         unsigned long wait = 0;
 493
 494         /*
 495          * Some commands are *slow* and normally take a long time to complete.
 496          * Usually we can use the ATAPI "disconnect" to bypass this, but not all
 497          * commands/drives support that. Let ide_timer_expiry keep polling us
 498          * for these.
 499          */
 500         switch (rq->cmd[0]) {
 501         case GPCMD_BLANK:
 502         case GPCMD_FORMAT_UNIT:
 503         case GPCMD_RESERVE_RZONE_TRACK:
 504         case GPCMD_CLOSE_TRACK:
 505         case GPCMD_FLUSH_CACHE:
 506                 wait = ATAPI_WAIT_PC;
 507                 break;
 508         default:
 509                 if (!(rq->cmd_flags & REQ_QUIET))
 510                         printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n",
 511                                          rq->cmd[0]);
 512                 wait = 0;
 513                 break;
 514         }
 515         return wait;
 516 }
 517
 518 /*
 519  * Set up the device registers for transferring a packet command on DEV,
 520  * expecting to later transfer XFERLEN bytes.  HANDLER is the routine
 521  * which actually transfers the command to the drive.  If this is a
 522  * drq_interrupt device, this routine will arrange for HANDLER to be
 523  * called when the interrupt from the drive arrives.  Otherwise, HANDLER
 524  * will be called immediately after the drive is prepared for the transfer.
 525  */
 526 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
 527                                                   int xferlen,
 528                                                   ide_handler_t *handler)
 529 {
 530         ide_startstop_t startstop;
 531         struct cdrom_info *info = drive->driver_data;
 532         ide_hwif_t *hwif = drive->hwif;
 533
 534         /* wait for the controller to be idle */
 535         if (ide_wait_stat(&startstop, drive, 0, BUSY_STAT, WAIT_READY))
 536                 return startstop;
 537
 538         /* FIXME: for Virtual DMA we must check harder */
 539         if (info->dma)
 540                 info->dma = !hwif->dma_ops->dma_setup(drive);
 541
 542         /* set up the controller registers */
 543         ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL |
 544                            IDE_TFLAG_NO_SELECT_MASK, xferlen, info->dma);
 545
 546         if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) {
 547                 /* waiting for CDB interrupt, not DMA yet. */
 548                 if (info->dma)
 549                         drive->waiting_for_dma = 0;
 550
 551                 /* packet command */
 552                 ide_execute_command(drive, WIN_PACKETCMD, handler,
 553                                     ATAPI_WAIT_PC, cdrom_timer_expiry);
 554                 return ide_started;
 555         } else {
 556                 ide_execute_pkt_cmd(drive);
 557
 558                 return (*handler) (drive);
 559         }
 560 }
 561
 562 /*
 563  * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
 564  * registers must have already been prepared by cdrom_start_packet_command.
 565  * HANDLER is the interrupt handler to call when the command completes or
 566  * there's data ready.
 567  */
 568 #define ATAPI_MIN_CDB_BYTES 12
 569 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive,
 570                                           struct request *rq,
 571                                           ide_handler_t *handler)
 572 {
 573         ide_hwif_t *hwif = drive->hwif;
 574         int cmd_len;
 575         struct cdrom_info *info = drive->driver_data;
 576         ide_startstop_t startstop;
 577
 578         if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) {
 579                 /*
 580                  * Here we should have been called after receiving an interrupt
 581                  * from the device.  DRQ should how be set.
 582                  */
 583
 584                 /* check for errors */
 585                 if (cdrom_decode_status(drive, DRQ_STAT, NULL))
 586                         return ide_stopped;
 587
 588                 /* ok, next interrupt will be DMA interrupt */
 589                 if (info->dma)
 590                         drive->waiting_for_dma = 1;
 591         } else {
 592                 /* otherwise, we must wait for DRQ to get set */
 593                 if (ide_wait_stat(&startstop, drive, DRQ_STAT,
 594                                 BUSY_STAT, WAIT_READY))
 595                         return startstop;
 596         }
 597
 598         /* arm the interrupt handler */
 599         ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry);
 600
 601         /* ATAPI commands get padded out to 12 bytes minimum */
 602         cmd_len = COMMAND_SIZE(rq->cmd[0]);
 603         if (cmd_len < ATAPI_MIN_CDB_BYTES)
 604                 cmd_len = ATAPI_MIN_CDB_BYTES;
 605
 606         /* send the command to the device */
 607         hwif->output_data(drive, NULL, rq->cmd, cmd_len);
 608
 609         /* start the DMA if need be */
 610         if (info->dma)
 611                 hwif->dma_ops->dma_start(drive);
 612
 613         return ide_started;
 614 }
 615
 616 /*
 617  * Block read functions.
 618  */
 619 static void ide_cd_pad_transfer(ide_drive_t *drive, xfer_func_t *xf, int len)
 620 {
 621         while (len > 0) {
 622                 int dum = 0;
 623                 xf(drive, NULL, &dum, sizeof(dum));
 624                 len -= sizeof(dum);
 625         }
 626 }
 627
 628 static void ide_cd_drain_data(ide_drive_t *drive, int nsects)
 629 {
 630         while (nsects > 0) {
 631                 static char dum[SECTOR_SIZE];
 632
 633                 drive->hwif->input_data(drive, NULL, dum, sizeof(dum));
 634                 nsects--;
 635         }
 636 }
 637
 638 /*
 639  * Check the contents of the interrupt reason register from the cdrom
 640  * and attempt to recover if there are problems.  Returns  0 if everything's
 641  * ok; nonzero if the request has been terminated.
 642  */
 643 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
 644                                 int len, int ireason, int rw)
 645 {
 646         /*
 647          * ireason == 0: the drive wants to receive data from us
 648          * ireason == 2: the drive is expecting to transfer data to us
 649          */
 650         if (ireason == (!rw << 1))
 651                 return 0;
 652         else if (ireason == (rw << 1)) {
 653                 ide_hwif_t *hwif = drive->hwif;
 654                 xfer_func_t *xf;
 655
 656                 /* whoops... */
 657                 printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
 658                                 drive->name, __func__);
 659
 660                 xf = rw ? hwif->output_data : hwif->input_data;
 661                 ide_cd_pad_transfer(drive, xf, len);
 662         } else  if (rw == 0 && ireason == 1) {
 663                 /*
 664                  * Some drives (ASUS) seem to tell us that status info is
 665                  * available.  Just get it and ignore.
 666                  */
 667                 (void)ide_read_status(drive);
 668                 return 0;
 669         } else {
 670                 /* drive wants a command packet, or invalid ireason... */
 671                 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n",
 672                                 drive->name, __func__, ireason);
 673         }
 674
 675         if (rq->cmd_type == REQ_TYPE_ATA_PC)
 676                 rq->cmd_flags |= REQ_FAILED;
 677
 678         cdrom_end_request(drive, 0);
 679         return -1;
 680 }
 681
 682 /*
 683  * Assume that the drive will always provide data in multiples of at least
 684  * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
 685  */
 686 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
 687 {
 688         struct cdrom_info *cd = drive->driver_data;
 689
 690         if ((len % SECTOR_SIZE) == 0)
 691                 return 0;
 692
 693         printk(KERN_ERR "%s: %s: Bad transfer size %d\n",
 694                         drive->name, __func__, len);
 695
 696         if (cd->cd_flags & IDE_CD_FLAG_LIMIT_NFRAMES)
 697                 printk(KERN_ERR "  This drive is not supported by "
 698                                 "this version of the driver\n");
 699         else {
 700                 printk(KERN_ERR "  Trying to limit transfer sizes\n");
 701                 cd->cd_flags |= IDE_CD_FLAG_LIMIT_NFRAMES;
 702         }
 703
 704         return 1;
 705 }
 706
 707 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
 708
 709 /*
 710  * Routine to send a read/write packet command to the drive. This is usually
 711  * called directly from cdrom_start_{read,write}(). However, for drq_interrupt
 712  * devices, it is called from an interrupt when the drive is ready to accept
 713  * the command.
 714  */
 715 static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive)
 716 {
 717         struct request *rq = HWGROUP(drive)->rq;
 718
 719         if (rq_data_dir(rq) == READ) {
 720                 unsigned short sectors_per_frame =
 721                         queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 722                 int nskip = rq->sector & (sectors_per_frame - 1);
 723
 724                 /*
 725                  * If the requested sector doesn't start on a frame boundary,
 726                  * we must adjust the start of the transfer so that it does,
 727                  * and remember to skip the first few sectors.
 728                  *
 729                  * If the rq->current_nr_sectors field is larger than the size
 730                  * of the buffer, it will mean that we're to skip a number of
 731                  * sectors equal to the amount by which rq->current_nr_sectors
 732                  * is larger than the buffer size.
 733                  */
 734                 if (nskip > 0) {
 735                         /* sanity check... */
 736                         if (rq->current_nr_sectors !=
 737                             bio_cur_sectors(rq->bio)) {
 738                                 printk(KERN_ERR "%s: %s: buffer botch (%u)\n",
 739                                                 drive->name, __func__,
 740                                                 rq->current_nr_sectors);
 741                                 cdrom_end_request(drive, 0);
 742                                 return ide_stopped;
 743                         }
 744                         rq->current_nr_sectors += nskip;
 745                 }
 746         }
 747 #if 0
 748         else
 749                 /* the immediate bit */
 750                 rq->cmd[1] = 1 << 3;
 751 #endif
 752         /* set up the command */
 753         rq->timeout = ATAPI_WAIT_PC;
 754
 755         /* send the command to the drive and return */
 756         return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
 757 }
 758
 759 #define IDECD_SEEK_THRESHOLD    (1000)                  /* 1000 blocks */
 760 #define IDECD_SEEK_TIMER        (5 * WAIT_MIN_SLEEP)    /* 100 ms */
 761 #define IDECD_SEEK_TIMEOUT      (2 * WAIT_CMD)          /* 20 sec */
 762
 763 static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive)
 764 {
 765         struct cdrom_info *info = drive->driver_data;
 766         int stat;
 767         static int retry = 10;
 768
 769         if (cdrom_decode_status(drive, 0, &stat))
 770                 return ide_stopped;
 771
 772         info->cd_flags |= IDE_CD_FLAG_SEEKING;
 773
 774         if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) {
 775                 if (--retry == 0)
 776                         drive->dsc_overlap = 0;
 777         }
 778         return ide_stopped;
 779 }
 780
 781 static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive)
 782 {
 783         struct request *rq = HWGROUP(drive)->rq;
 784         sector_t frame = rq->sector;
 785
 786         sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS);
 787
 788         memset(rq->cmd, 0, sizeof(rq->cmd));
 789         rq->cmd[0] = GPCMD_SEEK;
 790         put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]);
 791
 792         rq->timeout = ATAPI_WAIT_PC;
 793         return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
 794 }
 795
 796 static ide_startstop_t cdrom_start_seek(ide_drive_t *drive, unsigned int block)
 797 {
 798         struct cdrom_info *info = drive->driver_data;
 799
 800         info->dma = 0;
 801         info->start_seek = jiffies;
 802         return cdrom_start_packet_command(drive, 0,
 803                                           cdrom_start_seek_continuation);
 804 }
 805
 806 /*
 807  * Fix up a possibly partially-processed request so that we can start it over
 808  * entirely, or even put it back on the request queue.
 809  */
 810 static void restore_request(struct request *rq)
 811 {
 812         if (rq->buffer != bio_data(rq->bio)) {
 813                 sector_t n =
 814                         (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
 815
 816                 rq->buffer = bio_data(rq->bio);
 817                 rq->nr_sectors += n;
 818                 rq->sector -= n;
 819         }
 820         rq->current_nr_sectors = bio_cur_sectors(rq->bio);
 821         rq->hard_cur_sectors = rq->current_nr_sectors;
 822         rq->hard_nr_sectors = rq->nr_sectors;
 823         rq->hard_sector = rq->sector;
 824         rq->q->prep_rq_fn(rq->q, rq);
 825 }
 826
 827 /*
 828  * All other packet commands.
 829  */
 830 static void ide_cd_request_sense_fixup(struct request *rq)
 831 {
 832         /*
 833          * Some of the trailing request sense fields are optional,
 834          * and some drives don't send them.  Sigh.
 835          */
 836         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 837             rq->data_len > 0 && rq->data_len <= 5)
 838                 while (rq->data_len > 0) {
 839                         *(u8 *)rq->data++ = 0;
 840                         --rq->data_len;
 841                 }
 842 }
 843
 844 int ide_cd_queue_pc(ide_drive_t *drive, struct request *rq)
 845 {
 846         struct request_sense sense;
 847         int retries = 10;
 848         unsigned int flags = rq->cmd_flags;
 849
 850         if (rq->sense == NULL)
 851                 rq->sense = &sense;
 852
 853         /* start of retry loop */
 854         do {
 855                 int error;
 856                 unsigned long time = jiffies;
 857                 rq->cmd_flags = flags;
 858
 859                 error = ide_do_drive_cmd(drive, rq, ide_wait);
 860                 time = jiffies - time;
 861
 862                 /*
 863                  * FIXME: we should probably abort/retry or something in case of
 864                  * failure.
 865                  */
 866                 if (rq->cmd_flags & REQ_FAILED) {
 867                         /*
 868                          * The request failed.  Retry if it was due to a unit
 869                          * attention status (usually means media was changed).
 870                          */
 871                         struct request_sense *reqbuf = rq->sense;
 872
 873                         if (reqbuf->sense_key == UNIT_ATTENTION)
 874                                 cdrom_saw_media_change(drive);
 875                         else if (reqbuf->sense_key == NOT_READY &&
 876                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 877                                 /*
 878                                  * The drive is in the process of loading
 879                                  * a disk.  Retry, but wait a little to give
 880                                  * the drive time to complete the load.
 881                                  */
 882                                 ssleep(2);
 883                         } else {
 884                                 /* otherwise, don't retry */
 885                                 retries = 0;
 886                         }
 887                         --retries;
 888                 }
 889
 890                 /* end of retry loop */
 891         } while ((rq->cmd_flags & REQ_FAILED) && retries >= 0);
 892
 893         /* return an error if the command failed */
 894         return (rq->cmd_flags & REQ_FAILED) ? -EIO : 0;
 895 }
 896
 897 /*
 898  * Called from blk_end_request_callback() after the data of the request is
 899  * completed and before the request itself is completed. By returning value '1',
 900  * blk_end_request_callback() returns immediately without completing it.
 901  */
 902 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
 903 {
 904         return 1;
 905 }
 906
 907 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 908 {
 909         ide_hwif_t *hwif = drive->hwif;
 910         struct cdrom_info *info = drive->driver_data;
 911         struct request *rq = HWGROUP(drive)->rq;
 912         xfer_func_t *xferfunc;
 913         ide_expiry_t *expiry = NULL;
 914         int dma_error = 0, dma, stat, ireason, len, thislen, uptodate = 0;
 915         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
 916         unsigned int timeout;
 917         u8 lowcyl, highcyl;
 918
 919         /* check for errors */
 920         dma = info->dma;
 921         if (dma) {
 922                 info->dma = 0;
 923                 dma_error = hwif->dma_ops->dma_end(drive);
 924                 if (dma_error) {
 925                         printk(KERN_ERR "%s: DMA %s error\n", drive->name,
 926                                         write ? "write" : "read");
 927                         ide_dma_off(drive);
 928                 }
 929         }
 930
 931         if (cdrom_decode_status(drive, 0, &stat))
 932                 return ide_stopped;
 933
 934         /* using dma, transfer is complete now */
 935         if (dma) {
 936                 if (dma_error)
 937                         return ide_error(drive, "dma error", stat);
 938                 if (blk_fs_request(rq)) {
 939                         ide_end_request(drive, 1, rq->nr_sectors);
 940                         return ide_stopped;
 941                 }
 942                 goto end_request;
 943         }
 944
 945         /* ok we fall to pio :/ */
 946         ireason = hwif->INB(hwif->io_ports.nsect_addr) & 0x3;
 947         lowcyl  = hwif->INB(hwif->io_ports.lbam_addr);
 948         highcyl = hwif->INB(hwif->io_ports.lbah_addr);
 949
 950         len = lowcyl + (256 * highcyl);
 951
 952         thislen = blk_fs_request(rq) ? len : rq->data_len;
 953         if (thislen > len)
 954                 thislen = len;
 955
 956         /* If DRQ is clear, the command has completed. */
 957         if ((stat & DRQ_STAT) == 0) {
 958                 if (blk_fs_request(rq)) {
 959                         /*
 960                          * If we're not done reading/writing, complain.
 961                          * Otherwise, complete the command normally.
 962                          */
 963                         uptodate = 1;
 964                         if (rq->current_nr_sectors > 0) {
 965                                 printk(KERN_ERR "%s: %s: data underrun "
 966                                                 "(%d blocks)\n",
 967                                                 drive->name, __func__,
 968                                                 rq->current_nr_sectors);
 969                                 if (!write)
 970                                         rq->cmd_flags |= REQ_FAILED;
 971                                 uptodate = 0;
 972                         }
 973                         cdrom_end_request(drive, uptodate);
 974                         return ide_stopped;
 975                 } else if (!blk_pc_request(rq)) {
 976                         ide_cd_request_sense_fixup(rq);
 977                         /* complain if we still have data left to transfer */
 978                         uptodate = rq->data_len ? 0 : 1;
 979                 }
 980                 goto end_request;
 981         }
 982
 983         /* check which way to transfer data */
 984         if (ide_cd_check_ireason(drive, rq, len, ireason, write))
 985                 return ide_stopped;
 986
 987         if (blk_fs_request(rq)) {
 988                 if (write == 0) {
 989                         int nskip;
 990
 991                         if (ide_cd_check_transfer_size(drive, len)) {
 992                                 cdrom_end_request(drive, 0);
 993                                 return ide_stopped;
 994                         }
 995
 996                         /*
 997                          * First, figure out if we need to bit-bucket
 998                          * any of the leading sectors.
 999                          */
1000                         nskip = min_t(int, rq->current_nr_sectors
1001                                            - bio_cur_sectors(rq->bio),
1002                                            thislen >> 9);
1003                         if (nskip > 0) {
1004                                 ide_cd_drain_data(drive, nskip);
1005                                 rq->current_nr_sectors -= nskip;
1006                                 thislen -= (nskip << 9);
1007                         }
1008                 }
1009         }
1010
1011         if (ireason == 0) {
1012                 write = 1;
1013                 xferfunc = hwif->output_data;
1014         } else {
1015                 write = 0;
1016                 xferfunc = hwif->input_data;
1017         }
1018
1019         /* transfer data */
1020         while (thislen > 0) {
1021                 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
1022                 int blen = rq->data_len;
1023
1024                 /* bio backed? */
1025                 if (rq->bio) {
1026                         if (blk_fs_request(rq)) {
1027                                 ptr = rq->buffer;
1028                                 blen = rq->current_nr_sectors << 9;
1029                         } else {
1030                                 ptr = bio_data(rq->bio);
1031                                 blen = bio_iovec(rq->bio)->bv_len;
1032                         }
1033                 }
1034
1035                 if (!ptr) {
1036                         if (blk_fs_request(rq) && !write)
1037                                 /*
1038                                  * If the buffers are full, pipe the rest into
1039                                  * oblivion.
1040                                  */
1041                                 ide_cd_drain_data(drive, thislen >> 9);
1042                         else {
1043                                 printk(KERN_ERR "%s: confused, missing data\n",
1044                                                 drive->name);
1045                                 blk_dump_rq_flags(rq, rq_data_dir(rq)
1046                                                   ? "cdrom_newpc_intr, write"
1047                                                   : "cdrom_newpc_intr, read");
1048                         }
1049                         break;
1050                 }
1051
1052                 if (blen > thislen)
1053                         blen = thislen;
1054
1055                 xferfunc(drive, NULL, ptr, blen);
1056
1057                 thislen -= blen;
1058                 len -= blen;
1059
1060                 if (blk_fs_request(rq)) {
1061                         rq->buffer += blen;
1062                         rq->nr_sectors -= (blen >> 9);
1063                         rq->current_nr_sectors -= (blen >> 9);
1064                         rq->sector += (blen >> 9);
1065
1066                         if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1067                                 cdrom_end_request(drive, 1);
1068                 } else {
1069                         rq->data_len -= blen;
1070
1071                         /*
1072                          * The request can't be completed until DRQ is cleared.
1073                          * So complete the data, but don't complete the request
1074                          * using the dummy function for the callback feature
1075                          * of blk_end_request_callback().
1076                          */
1077                         if (rq->bio)
1078                                 blk_end_request_callback(rq, 0, blen,
1079                                                  cdrom_newpc_intr_dummy_cb);
1080                         else
1081                                 rq->data += blen;
1082                 }
1083                 if (!write && blk_sense_request(rq))
1084                         rq->sense_len += blen;
1085         }
1086
1087         /* pad, if necessary */
1088         if (!blk_fs_request(rq) && len > 0)
1089                 ide_cd_pad_transfer(drive, xferfunc, len);
1090
1091         if (blk_pc_request(rq)) {
1092                 timeout = rq->timeout;
1093         } else {
1094                 timeout = ATAPI_WAIT_PC;
1095                 if (!blk_fs_request(rq))
1096                         expiry = cdrom_timer_expiry;
1097         }
1098
1099         ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1100         return ide_started;
1101
1102 end_request:
1103         if (blk_pc_request(rq)) {
1104                 unsigned long flags;
1105                 unsigned int dlen = rq->data_len;
1106
1107                 if (dma)
1108                         rq->data_len = 0;
1109
1110                 spin_lock_irqsave(&ide_lock, flags);
1111                 if (__blk_end_request(rq, 0, dlen))
1112                         BUG();
1113                 HWGROUP(drive)->rq = NULL;
1114                 spin_unlock_irqrestore(&ide_lock, flags);
1115         } else {
1116                 if (!uptodate)
1117                         rq->cmd_flags |= REQ_FAILED;
1118                 cdrom_end_request(drive, uptodate);
1119         }
1120         return ide_stopped;
1121 }
1122
1123 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1124 {
1125         struct cdrom_info *cd = drive->driver_data;
1126         int write = rq_data_dir(rq) == WRITE;
1127         unsigned short sectors_per_frame =
1128                 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1129
1130         if (write) {
1131                 /* disk has become write protected */
1132                 if (cd->disk->policy) {
1133                         cdrom_end_request(drive, 0);
1134                         return ide_stopped;
1135                 }
1136         } else {
1137                 /*
1138                  * We may be retrying this request after an error.  Fix up any
1139                  * weirdness which might be present in the request packet.
1140                  */
1141                 restore_request(rq);
1142         }
1143
1144         /* use DMA, if possible / writes *must* be hardware frame aligned */
1145         if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1146             (rq->sector & (sectors_per_frame - 1))) {
1147                 if (write) {
1148                         cdrom_end_request(drive, 0);
1149                         return ide_stopped;
1150                 }
1151                 cd->dma = 0;
1152         } else
1153                 cd->dma = drive->using_dma;
1154
1155         if (write)
1156                 cd->devinfo.media_written = 1;
1157
1158         /* start sending the read/write request to the drive */
1159         return cdrom_start_packet_command(drive, 32768, cdrom_start_rw_cont);
1160 }
1161
1162 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1163 {
1164         struct request *rq = HWGROUP(drive)->rq;
1165
1166         if (!rq->timeout)
1167                 rq->timeout = ATAPI_WAIT_PC;
1168
1169         return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1170 }
1171
1172 static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1173 {
1174         struct cdrom_info *info = drive->driver_data;
1175
1176         if (blk_pc_request(rq))
1177                 rq->cmd_flags |= REQ_QUIET;
1178         else
1179                 rq->cmd_flags &= ~REQ_FAILED;
1180
1181         info->dma = 0;
1182
1183         /* sg request */
1184         if (rq->bio) {
1185                 int mask = drive->queue->dma_alignment;
1186                 unsigned long addr =
1187                         (unsigned long)page_address(bio_page(rq->bio));
1188
1189                 info->dma = drive->using_dma;
1190
1191                 /*
1192                  * check if dma is safe
1193                  *
1194                  * NOTE! The "len" and "addr" checks should possibly have
1195                  * separate masks.
1196                  */
1197                 if ((rq->data_len & 15) || (addr & mask))
1198                         info->dma = 0;
1199         }
1200
1201         /* start sending the command to the drive */
1202         return cdrom_start_packet_command(drive, rq->data_len,
1203                                           cdrom_do_newpc_cont);
1204 }
1205
1206 /*
1207  * cdrom driver request routine.
1208  */
1209 static ide_startstop_t ide_do_rw_cdrom(ide_drive_t *drive, struct request *rq,
1210                                         sector_t block)
1211 {
1212         ide_startstop_t action;
1213         struct cdrom_info *info = drive->driver_data;
1214
1215         if (blk_fs_request(rq)) {
1216                 if (info->cd_flags & IDE_CD_FLAG_SEEKING) {
1217                         unsigned long elapsed = jiffies - info->start_seek;
1218                         int stat = ide_read_status(drive);
1219
1220                         if ((stat & SEEK_STAT) != SEEK_STAT) {
1221                                 if (elapsed < IDECD_SEEK_TIMEOUT) {
1222                                         ide_stall_queue(drive,
1223                                                         IDECD_SEEK_TIMER);
1224                                         return ide_stopped;
1225                                 }
1226                                 printk(KERN_ERR "%s: DSC timeout\n",
1227                                                 drive->name);
1228                         }
1229                         info->cd_flags &= ~IDE_CD_FLAG_SEEKING;
1230                 }
1231                 if (rq_data_dir(rq) == READ &&
1232                     IDE_LARGE_SEEK(info->last_block, block,
1233                                    IDECD_SEEK_THRESHOLD) &&
1234                     drive->dsc_overlap)
1235                         action = cdrom_start_seek(drive, block);
1236                 else
1237                         action = cdrom_start_rw(drive, rq);
1238                 info->last_block = block;
1239                 return action;
1240         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1241                    rq->cmd_type == REQ_TYPE_ATA_PC) {
1242                 return 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         }
1248
1249         blk_dump_rq_flags(rq, "ide-cd bad flags");
1250         cdrom_end_request(drive, 0);
1251         return ide_stopped;
1252 }
1253
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 request req;
1275         struct cdrom_info *info = drive->driver_data;
1276         struct cdrom_device_info *cdi = &info->devinfo;
1277
1278         ide_cd_init_rq(drive, &req);
1279
1280         req.sense = sense;
1281         req.cmd[0] = GPCMD_TEST_UNIT_READY;
1282         req.cmd_flags |= REQ_QUIET;
1283
1284         /*
1285          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1286          * instead of supporting the LOAD_UNLOAD opcode.
1287          */
1288         req.cmd[7] = cdi->sanyo_slot % 3;
1289
1290         return ide_cd_queue_pc(drive, &req);
1291 }
1292
1293 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1294                                unsigned long *sectors_per_frame,
1295                                struct request_sense *sense)
1296 {
1297         struct {
1298                 __u32 lba;
1299                 __u32 blocklen;
1300         } capbuf;
1301
1302         int stat;
1303         struct request req;
1304
1305         ide_cd_init_rq(drive, &req);
1306
1307         req.sense = sense;
1308         req.cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1309         req.data = (char *)&capbuf;
1310         req.data_len = sizeof(capbuf);
1311         req.cmd_flags |= REQ_QUIET;
1312
1313         stat = ide_cd_queue_pc(drive, &req);
1314         if (stat == 0) {
1315                 *capacity = 1 + be32_to_cpu(capbuf.lba);
1316                 *sectors_per_frame =
1317                         be32_to_cpu(capbuf.blocklen) >> SECTOR_BITS;
1318         }
1319
1320         return stat;
1321 }
1322
1323 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1324                                 int format, char *buf, int buflen,
1325                                 struct request_sense *sense)
1326 {
1327         struct request req;
1328
1329         ide_cd_init_rq(drive, &req);
1330
1331         req.sense = sense;
1332         req.data =  buf;
1333         req.data_len = buflen;
1334         req.cmd_flags |= REQ_QUIET;
1335         req.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1336         req.cmd[6] = trackno;
1337         req.cmd[7] = (buflen >> 8);
1338         req.cmd[8] = (buflen & 0xff);
1339         req.cmd[9] = (format << 6);
1340
1341         if (msf_flag)
1342                 req.cmd[1] = 2;
1343
1344         return ide_cd_queue_pc(drive, &req);
1345 }
1346
1347 /* Try to read the entire TOC for the disk into our internal buffer. */
1348 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1349 {
1350         int stat, ntracks, i;
1351         struct cdrom_info *info = drive->driver_data;
1352         struct cdrom_device_info *cdi = &info->devinfo;
1353         struct atapi_toc *toc = info->toc;
1354         struct {
1355                 struct atapi_toc_header hdr;
1356                 struct atapi_toc_entry  ent;
1357         } ms_tmp;
1358         long last_written;
1359         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1360
1361         if (toc == NULL) {
1362                 /* try to allocate space */
1363                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1364                 if (toc == NULL) {
1365                         printk(KERN_ERR "%s: No cdrom TOC buffer!\n",
1366                                         drive->name);
1367                         return -ENOMEM;
1368                 }
1369                 info->toc = toc;
1370         }
1371
1372         /*
1373          * Check to see if the existing data is still valid. If it is,
1374          * just return.
1375          */
1376         (void) cdrom_check_status(drive, sense);
1377
1378         if (info->cd_flags & IDE_CD_FLAG_TOC_VALID)
1379                 return 0;
1380
1381         /* try to get the total cdrom capacity and sector size */
1382         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1383                                    sense);
1384         if (stat)
1385                 toc->capacity = 0x1fffff;
1386
1387         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1388         /* save a private copy of the TOC capacity for error handling */
1389         drive->probed_capacity = toc->capacity * sectors_per_frame;
1390
1391         blk_queue_hardsect_size(drive->queue,
1392                                 sectors_per_frame << SECTOR_BITS);
1393
1394         /* first read just the header, so we know how long the TOC is */
1395         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1396                                     sizeof(struct atapi_toc_header), sense);
1397         if (stat)
1398                 return stat;
1399
1400         if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1401                 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1402                 toc->hdr.last_track  = BCD2BIN(toc->hdr.last_track);
1403         }
1404
1405         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1406         if (ntracks <= 0)
1407                 return -EIO;
1408         if (ntracks > MAX_TRACKS)
1409                 ntracks = MAX_TRACKS;
1410
1411         /* now read the whole schmeer */
1412         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1413                                   (char *)&toc->hdr,
1414                                    sizeof(struct atapi_toc_header) +
1415                                    (ntracks + 1) *
1416                                    sizeof(struct atapi_toc_entry), sense);
1417
1418         if (stat && toc->hdr.first_track > 1) {
1419                 /*
1420                  * Cds with CDI tracks only don't have any TOC entries, despite
1421                  * of this the returned values are
1422                  * first_track == last_track = number of CDI tracks + 1,
1423                  * so that this case is indistinguishable from the same layout
1424                  * plus an additional audio track. If we get an error for the
1425                  * regular case, we assume a CDI without additional audio
1426                  * tracks. In this case the readable TOC is empty (CDI tracks
1427                  * are not included) and only holds the Leadout entry.
1428                  *
1429                  * Heiko Eißfeldt.
1430                  */
1431                 ntracks = 0;
1432                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1433                                            (char *)&toc->hdr,
1434                                            sizeof(struct atapi_toc_header) +
1435                                            (ntracks + 1) *
1436                                            sizeof(struct atapi_toc_entry),
1437                                            sense);
1438                 if (stat)
1439                         return stat;
1440
1441                 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1442                         toc->hdr.first_track = (u8)BIN2BCD(CDROM_LEADOUT);
1443                         toc->hdr.last_track = (u8)BIN2BCD(CDROM_LEADOUT);
1444                 } else {
1445                         toc->hdr.first_track = CDROM_LEADOUT;
1446                         toc->hdr.last_track = CDROM_LEADOUT;
1447                 }
1448         }
1449
1450         if (stat)
1451                 return stat;
1452
1453         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1454
1455         if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1456                 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1457                 toc->hdr.last_track  = BCD2BIN(toc->hdr.last_track);
1458         }
1459
1460         for (i = 0; i <= ntracks; i++) {
1461                 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1462                         if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD)
1463                                 toc->ent[i].track = BCD2BIN(toc->ent[i].track);
1464                         msf_from_bcd(&toc->ent[i].addr.msf);
1465                 }
1466                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1467                                                   toc->ent[i].addr.msf.second,
1468                                                   toc->ent[i].addr.msf.frame);
1469         }
1470
1471         if (toc->hdr.first_track != CDROM_LEADOUT) {
1472                 /* read the multisession information */
1473                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1474                                            sizeof(ms_tmp), sense);
1475                 if (stat)
1476                         return stat;
1477
1478                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1479         } else {
1480                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1481                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1482                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1483         }
1484
1485         if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1486                 /* re-read multisession information using MSF format */
1487                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1488                                            sizeof(ms_tmp), sense);
1489                 if (stat)
1490                         return stat;
1491
1492                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1493                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1494                                                    ms_tmp.ent.addr.msf.second,
1495                                                    ms_tmp.ent.addr.msf.frame);
1496         }
1497
1498         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1499
1500         /* now try to get the total cdrom capacity */
1501         stat = cdrom_get_last_written(cdi, &last_written);
1502         if (!stat && (last_written > toc->capacity)) {
1503                 toc->capacity = last_written;
1504                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1505                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1506         }
1507
1508         /* Remember that we've read this stuff. */
1509         info->cd_flags |= IDE_CD_FLAG_TOC_VALID;
1510
1511         return 0;
1512 }
1513
1514 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1515 {
1516         struct cdrom_info *info = drive->driver_data;
1517         struct cdrom_device_info *cdi = &info->devinfo;
1518         struct packet_command cgc;
1519         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1520
1521         if ((info->cd_flags & IDE_CD_FLAG_FULL_CAPS_PAGE) == 0)
1522                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1523
1524         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1525         do {
1526                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1527                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1528                 if (!stat)
1529                         break;
1530         } while (--attempts);
1531         return stat;
1532 }
1533
1534 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1535 {
1536         struct cdrom_info *cd = drive->driver_data;
1537         u16 curspeed, maxspeed;
1538
1539         curspeed = *(u16 *)&buf[8 + 14];
1540         maxspeed = *(u16 *)&buf[8 +  8];
1541
1542         if (cd->cd_flags & IDE_CD_FLAG_LE_SPEED_FIELDS) {
1543                 curspeed = le16_to_cpu(curspeed);
1544                 maxspeed = le16_to_cpu(maxspeed);
1545         } else {
1546                 curspeed = be16_to_cpu(curspeed);
1547                 maxspeed = be16_to_cpu(maxspeed);
1548         }
1549
1550         cd->current_speed = (curspeed + (176/2)) / 176;
1551         cd->max_speed = (maxspeed + (176/2)) / 176;
1552 }
1553
1554 #define IDE_CD_CAPABILITIES \
1555         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1556          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1557          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1558          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1559          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1560
1561 static struct cdrom_device_ops ide_cdrom_dops = {
1562         .open                   = ide_cdrom_open_real,
1563         .release                = ide_cdrom_release_real,
1564         .drive_status           = ide_cdrom_drive_status,
1565         .media_changed          = ide_cdrom_check_media_change_real,
1566         .tray_move              = ide_cdrom_tray_move,
1567         .lock_door              = ide_cdrom_lock_door,
1568         .select_speed           = ide_cdrom_select_speed,
1569         .get_last_session       = ide_cdrom_get_last_session,
1570         .get_mcn                = ide_cdrom_get_mcn,
1571         .reset                  = ide_cdrom_reset,
1572         .audio_ioctl            = ide_cdrom_audio_ioctl,
1573         .capability             = IDE_CD_CAPABILITIES,
1574         .generic_packet         = ide_cdrom_packet,
1575 };
1576
1577 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1578 {
1579         struct cdrom_info *info = drive->driver_data;
1580         struct cdrom_device_info *devinfo = &info->devinfo;
1581
1582         devinfo->ops = &ide_cdrom_dops;
1583         devinfo->speed = info->current_speed;
1584         devinfo->capacity = nslots;
1585         devinfo->handle = drive;
1586         strcpy(devinfo->name, drive->name);
1587
1588         if (info->cd_flags & IDE_CD_FLAG_NO_SPEED_SELECT)
1589                 devinfo->mask |= CDC_SELECT_SPEED;
1590
1591         devinfo->disk = info->disk;
1592         return register_cdrom(devinfo);
1593 }
1594
1595 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1596 {
1597         struct cdrom_info *cd = drive->driver_data;
1598         struct cdrom_device_info *cdi = &cd->devinfo;
1599         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1600         mechtype_t mechtype;
1601         int nslots = 1;
1602
1603         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1604                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1605                      CDC_MO_DRIVE | CDC_RAM);
1606
1607         if (drive->media == ide_optical) {
1608                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1609                 printk(KERN_ERR "%s: ATAPI magneto-optical drive\n",
1610                                 drive->name);
1611                 return nslots;
1612         }
1613
1614         if (cd->cd_flags & IDE_CD_FLAG_PRE_ATAPI12) {
1615                 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
1616                 cdi->mask &= ~CDC_PLAY_AUDIO;
1617                 return nslots;
1618         }
1619
1620         /*
1621          * We have to cheat a little here. the packet will eventually be queued
1622          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1623          * Since this device hasn't been registered with the Uniform layer yet,
1624          * it can't do this. Same goes for cdi->ops.
1625          */
1626         cdi->handle = drive;
1627         cdi->ops = &ide_cdrom_dops;
1628
1629         if (ide_cdrom_get_capabilities(drive, buf))
1630                 return 0;
1631
1632         if ((buf[8 + 6] & 0x01) == 0)
1633                 cd->cd_flags |= IDE_CD_FLAG_NO_DOORLOCK;
1634         if (buf[8 + 6] & 0x08)
1635                 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
1636         if (buf[8 + 3] & 0x01)
1637                 cdi->mask &= ~CDC_CD_R;
1638         if (buf[8 + 3] & 0x02)
1639                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1640         if (buf[8 + 2] & 0x38)
1641                 cdi->mask &= ~CDC_DVD;
1642         if (buf[8 + 3] & 0x20)
1643                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1644         if (buf[8 + 3] & 0x10)
1645                 cdi->mask &= ~CDC_DVD_R;
1646         if ((buf[8 + 4] & 0x01) || (cd->cd_flags & IDE_CD_FLAG_PLAY_AUDIO_OK))
1647                 cdi->mask &= ~CDC_PLAY_AUDIO;
1648
1649         mechtype = buf[8 + 6] >> 5;
1650         if (mechtype == mechtype_caddy || mechtype == mechtype_popup)
1651                 cdi->mask |= CDC_CLOSE_TRAY;
1652
1653         if (cdi->sanyo_slot > 0) {
1654                 cdi->mask &= ~CDC_SELECT_DISC;
1655                 nslots = 3;
1656         } else if (mechtype == mechtype_individual_changer ||
1657                    mechtype == mechtype_cartridge_changer) {
1658                 nslots = cdrom_number_of_slots(cdi);
1659                 if (nslots > 1)
1660                         cdi->mask &= ~CDC_SELECT_DISC;
1661         }
1662
1663         ide_cdrom_update_speed(drive, buf);
1664
1665         printk(KERN_INFO "%s: ATAPI", drive->name);
1666
1667         /* don't print speed if the drive reported 0 */
1668         if (cd->max_speed)
1669                 printk(KERN_CONT " %dX", cd->max_speed);
1670
1671         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1672
1673         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1674                 printk(KERN_CONT " DVD%s%s",
1675                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1676                                  (cdi->mask & CDC_DVD_RAM) ? "" : "-RAM");
1677
1678         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1679                 printk(KERN_CONT " CD%s%s",
1680                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1681                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1682
1683         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1684                 printk(KERN_CONT " changer w/%d slots", nslots);
1685         else
1686                 printk(KERN_CONT " drive");
1687
1688         printk(KERN_CONT ", %dkB Cache\n", be16_to_cpu(*(u16 *)&buf[8 + 12]));
1689
1690         return nslots;
1691 }
1692
1693 /* standard prep_rq_fn that builds 10 byte cmds */
1694 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1695 {
1696         int hard_sect = queue_hardsect_size(q);
1697         long block = (long)rq->hard_sector / (hard_sect >> 9);
1698         unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1699
1700         memset(rq->cmd, 0, sizeof(rq->cmd));
1701
1702         if (rq_data_dir(rq) == READ)
1703                 rq->cmd[0] = GPCMD_READ_10;
1704         else
1705                 rq->cmd[0] = GPCMD_WRITE_10;
1706
1707         /*
1708          * fill in lba
1709          */
1710         rq->cmd[2] = (block >> 24) & 0xff;
1711         rq->cmd[3] = (block >> 16) & 0xff;
1712         rq->cmd[4] = (block >>  8) & 0xff;
1713         rq->cmd[5] = block & 0xff;
1714
1715         /*
1716          * and transfer length
1717          */
1718         rq->cmd[7] = (blocks >> 8) & 0xff;
1719         rq->cmd[8] = blocks & 0xff;
1720         rq->cmd_len = 10;
1721         return BLKPREP_OK;
1722 }
1723
1724 /*
1725  * Most of the SCSI commands are supported directly by ATAPI devices.
1726  * This transform handles the few exceptions.
1727  */
1728 static int ide_cdrom_prep_pc(struct request *rq)
1729 {
1730         u8 *c = rq->cmd;
1731
1732         /* transform 6-byte read/write commands to the 10-byte version */
1733         if (c[0] == READ_6 || c[0] == WRITE_6) {
1734                 c[8] = c[4];
1735                 c[5] = c[3];
1736                 c[4] = c[2];
1737                 c[3] = c[1] & 0x1f;
1738                 c[2] = 0;
1739                 c[1] &= 0xe0;
1740                 c[0] += (READ_10 - READ_6);
1741                 rq->cmd_len = 10;
1742                 return BLKPREP_OK;
1743         }
1744
1745         /*
1746          * it's silly to pretend we understand 6-byte sense commands, just
1747          * reject with ILLEGAL_REQUEST and the caller should take the
1748          * appropriate action
1749          */
1750         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1751                 rq->errors = ILLEGAL_REQUEST;
1752                 return BLKPREP_KILL;
1753         }
1754
1755         return BLKPREP_OK;
1756 }
1757
1758 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1759 {
1760         if (blk_fs_request(rq))
1761                 return ide_cdrom_prep_fs(q, rq);
1762         else if (blk_pc_request(rq))
1763                 return ide_cdrom_prep_pc(rq);
1764
1765         return 0;
1766 }
1767
1768 struct cd_list_entry {
1769         const char      *id_model;
1770         const char      *id_firmware;
1771         unsigned int    cd_flags;
1772 };
1773
1774 #ifdef CONFIG_IDE_PROC_FS
1775 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1776 {
1777         unsigned long capacity, sectors_per_frame;
1778
1779         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1780                 return 0;
1781
1782         return capacity * sectors_per_frame;
1783 }
1784
1785 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1786                                         int count, int *eof, void *data)
1787 {
1788         ide_drive_t *drive = data;
1789         int len;
1790
1791         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1792         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1793 }
1794
1795 static ide_proc_entry_t idecd_proc[] = {
1796         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1797         { NULL, 0, NULL, NULL }
1798 };
1799
1800 static void ide_cdrom_add_settings(ide_drive_t *drive)
1801 {
1802         ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1,
1803                         &drive->dsc_overlap, NULL);
1804 }
1805 #else
1806 static inline void ide_cdrom_add_settings(ide_drive_t *drive) { ; }
1807 #endif
1808
1809 static const struct cd_list_entry ide_cd_quirks_list[] = {
1810         /* Limit transfer size per interrupt. */
1811         { "SAMSUNG CD-ROM SCR-2430", NULL,   IDE_CD_FLAG_LIMIT_NFRAMES      },
1812         { "SAMSUNG CD-ROM SCR-2432", NULL,   IDE_CD_FLAG_LIMIT_NFRAMES      },
1813         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1814         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_CD_FLAG_NO_SPEED_SELECT    },
1815         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1816         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_CD_FLAG_TOCADDR_AS_BCD |
1817                                              IDE_CD_FLAG_PRE_ATAPI12,       },
1818         /* Vertos 300, some versions of this drive like to talk BCD. */
1819         { "V003S0DS",                NULL,   IDE_CD_FLAG_VERTOS_300_SSD,    },
1820         /* Vertos 600 ESD. */
1821         { "V006E0DS",                NULL,   IDE_CD_FLAG_VERTOS_600_ESD,    },
1822         /*
1823          * Sanyo 3 CD changer uses a non-standard command for CD changing
1824          * (by default standard ATAPI support for CD changers is used).
1825          */
1826         { "CD-ROM CDR-C3 G",         NULL,   IDE_CD_FLAG_SANYO_3CD          },
1827         { "CD-ROM CDR-C3G",          NULL,   IDE_CD_FLAG_SANYO_3CD          },
1828         { "CD-ROM CDR_C36",          NULL,   IDE_CD_FLAG_SANYO_3CD          },
1829         /* Stingray 8X CD-ROM. */
1830         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_CD_FLAG_PRE_ATAPI12},
1831         /*
1832          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1833          * mode sense page capabilities size, but older drives break.
1834          */
1835         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_CD_FLAG_FULL_CAPS_PAGE  },
1836         { "WPI CDS-32X",                NULL,   IDE_CD_FLAG_FULL_CAPS_PAGE  },
1837         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1838         { "",                        "241N", IDE_CD_FLAG_LE_SPEED_FIELDS    },
1839         /*
1840          * Some drives used by Apple don't advertise audio play
1841          * but they do support reading TOC & audio datas.
1842          */
1843         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1844         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1845         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1846         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1847         { "Optiarc DVD RW AD-5200A", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1848         { NULL, NULL, 0 }
1849 };
1850
1851 static unsigned int ide_cd_flags(struct hd_driveid *id)
1852 {
1853         const struct cd_list_entry *cle = ide_cd_quirks_list;
1854
1855         while (cle->id_model) {
1856                 if (strcmp(cle->id_model, id->model) == 0 &&
1857                     (cle->id_firmware == NULL ||
1858                      strstr(id->fw_rev, cle->id_firmware)))
1859                         return cle->cd_flags;
1860                 cle++;
1861         }
1862
1863         return 0;
1864 }
1865
1866 static int ide_cdrom_setup(ide_drive_t *drive)
1867 {
1868         struct cdrom_info *cd = drive->driver_data;
1869         struct cdrom_device_info *cdi = &cd->devinfo;
1870         struct hd_driveid *id = drive->id;
1871         int nslots;
1872
1873         blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1874         blk_queue_dma_alignment(drive->queue, 31);
1875         drive->queue->unplug_delay = (1 * HZ) / 1000;
1876         if (!drive->queue->unplug_delay)
1877                 drive->queue->unplug_delay = 1;
1878
1879         drive->special.all      = 0;
1880
1881         cd->cd_flags = IDE_CD_FLAG_MEDIA_CHANGED | IDE_CD_FLAG_NO_EJECT |
1882                        ide_cd_flags(id);
1883
1884         if ((id->config & 0x0060) == 0x20)
1885                 cd->cd_flags |= IDE_CD_FLAG_DRQ_INTERRUPT;
1886
1887         if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_300_SSD) &&
1888             id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1889                 cd->cd_flags |= (IDE_CD_FLAG_TOCTRACKS_AS_BCD |
1890                                  IDE_CD_FLAG_TOCADDR_AS_BCD);
1891         else if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_600_ESD) &&
1892                  id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1893                 cd->cd_flags |= IDE_CD_FLAG_TOCTRACKS_AS_BCD;
1894         else if (cd->cd_flags & IDE_CD_FLAG_SANYO_3CD)
1895                 /* 3 => use CD in slot 0 */
1896                 cdi->sanyo_slot = 3;
1897
1898         nslots = ide_cdrom_probe_capabilities(drive);
1899
1900         /* set correct block size */
1901         blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1902
1903         drive->dsc_overlap = (drive->next != drive);
1904
1905         if (ide_cdrom_register(drive, nslots)) {
1906                 printk(KERN_ERR "%s: %s failed to register device with the"
1907                                 " cdrom driver.\n", drive->name, __func__);
1908                 cd->devinfo.handle = NULL;
1909                 return 1;
1910         }
1911         ide_cdrom_add_settings(drive);
1912         return 0;
1913 }
1914
1915 static void ide_cd_remove(ide_drive_t *drive)
1916 {
1917         struct cdrom_info *info = drive->driver_data;
1918
1919         ide_proc_unregister_driver(drive, info->driver);
1920
1921         del_gendisk(info->disk);
1922
1923         ide_cd_put(info);
1924 }
1925
1926 static void ide_cd_release(struct kref *kref)
1927 {
1928         struct cdrom_info *info = to_ide_cd(kref);
1929         struct cdrom_device_info *devinfo = &info->devinfo;
1930         ide_drive_t *drive = info->drive;
1931         struct gendisk *g = info->disk;
1932
1933         kfree(info->toc);
1934         if (devinfo->handle == drive)
1935                 unregister_cdrom(devinfo);
1936         drive->dsc_overlap = 0;
1937         drive->driver_data = NULL;
1938         blk_queue_prep_rq(drive->queue, NULL);
1939         g->private_data = NULL;
1940         put_disk(g);
1941         kfree(info);
1942 }
1943
1944 static int ide_cd_probe(ide_drive_t *);
1945
1946 static ide_driver_t ide_cdrom_driver = {
1947         .gen_driver = {
1948                 .owner          = THIS_MODULE,
1949                 .name           = "ide-cdrom",
1950                 .bus            = &ide_bus_type,
1951         },
1952         .probe                  = ide_cd_probe,
1953         .remove                 = ide_cd_remove,
1954         .version                = IDECD_VERSION,
1955         .media                  = ide_cdrom,
1956         .supports_dsc_overlap   = 1,
1957         .do_request             = ide_do_rw_cdrom,
1958         .end_request            = ide_end_request,
1959         .error                  = __ide_error,
1960         .abort                  = __ide_abort,
1961 #ifdef CONFIG_IDE_PROC_FS
1962         .proc                   = idecd_proc,
1963 #endif
1964 };
1965
1966 static int idecd_open(struct inode *inode, struct file *file)
1967 {
1968         struct gendisk *disk = inode->i_bdev->bd_disk;
1969         struct cdrom_info *info;
1970         int rc = -ENOMEM;
1971
1972         info = ide_cd_get(disk);
1973         if (!info)
1974                 return -ENXIO;
1975
1976         rc = cdrom_open(&info->devinfo, inode, file);
1977
1978         if (rc < 0)
1979                 ide_cd_put(info);
1980
1981         return rc;
1982 }
1983
1984 static int idecd_release(struct inode *inode, struct file *file)
1985 {
1986         struct gendisk *disk = inode->i_bdev->bd_disk;
1987         struct cdrom_info *info = ide_cd_g(disk);
1988
1989         cdrom_release(&info->devinfo, file);
1990
1991         ide_cd_put(info);
1992
1993         return 0;
1994 }
1995
1996 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1997 {
1998         struct packet_command cgc;
1999         char buffer[16];
2000         int stat;
2001         char spindown;
2002
2003         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
2004                 return -EFAULT;
2005
2006         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2007
2008         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2009         if (stat)
2010                 return stat;
2011
2012         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
2013         return cdrom_mode_select(cdi, &cgc);
2014 }
2015
2016 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2017 {
2018         struct packet_command cgc;
2019         char buffer[16];
2020         int stat;
2021         char spindown;
2022
2023         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2024
2025         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2026         if (stat)
2027                 return stat;
2028
2029         spindown = buffer[11] & 0x0f;
2030         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
2031                 return -EFAULT;
2032         return 0;
2033 }
2034
2035 static int idecd_ioctl(struct inode *inode, struct file *file,
2036                         unsigned int cmd, unsigned long arg)
2037 {
2038         struct block_device *bdev = inode->i_bdev;
2039         struct cdrom_info *info = ide_cd_g(bdev->bd_disk);
2040         int err;
2041
2042         switch (cmd) {
2043         case CDROMSETSPINDOWN:
2044                 return idecd_set_spindown(&info->devinfo, arg);
2045         case CDROMGETSPINDOWN:
2046                 return idecd_get_spindown(&info->devinfo, arg);
2047         default:
2048                 break;
2049         }
2050
2051         err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg);
2052         if (err == -EINVAL)
2053                 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg);
2054
2055         return err;
2056 }
2057
2058 static int idecd_media_changed(struct gendisk *disk)
2059 {
2060         struct cdrom_info *info = ide_cd_g(disk);
2061         return cdrom_media_changed(&info->devinfo);
2062 }
2063
2064 static int idecd_revalidate_disk(struct gendisk *disk)
2065 {
2066         struct cdrom_info *info = ide_cd_g(disk);
2067         struct request_sense sense;
2068
2069         ide_cd_read_toc(info->drive, &sense);
2070
2071         return  0;
2072 }
2073
2074 static struct block_device_operations idecd_ops = {
2075         .owner                  = THIS_MODULE,
2076         .open                   = idecd_open,
2077         .release                = idecd_release,
2078         .ioctl                  = idecd_ioctl,
2079         .media_changed          = idecd_media_changed,
2080         .revalidate_disk        = idecd_revalidate_disk
2081 };
2082
2083 /* module options */
2084 static char *ignore;
2085
2086 module_param(ignore, charp, 0400);
2087 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2088
2089 static int ide_cd_probe(ide_drive_t *drive)
2090 {
2091         struct cdrom_info *info;
2092         struct gendisk *g;
2093         struct request_sense sense;
2094
2095         if (!strstr("ide-cdrom", drive->driver_req))
2096                 goto failed;
2097         if (!drive->present)
2098                 goto failed;
2099         if (drive->media != ide_cdrom && drive->media != ide_optical)
2100                 goto failed;
2101         /* skip drives that we were told to ignore */
2102         if (ignore != NULL) {
2103                 if (strstr(ignore, drive->name)) {
2104                         printk(KERN_INFO "ide-cd: ignoring drive %s\n",
2105                                          drive->name);
2106                         goto failed;
2107                 }
2108         }
2109         if (drive->scsi) {
2110                 printk(KERN_INFO "ide-cd: passing drive %s to ide-scsi "
2111                                  "emulation.\n", drive->name);
2112                 goto failed;
2113         }
2114         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2115         if (info == NULL) {
2116                 printk(KERN_ERR "%s: Can't allocate a cdrom structure\n",
2117                                 drive->name);
2118                 goto failed;
2119         }
2120
2121         g = alloc_disk(1 << PARTN_BITS);
2122         if (!g)
2123                 goto out_free_cd;
2124
2125         ide_init_disk(g, drive);
2126
2127         ide_proc_register_driver(drive, &ide_cdrom_driver);
2128
2129         kref_init(&info->kref);
2130
2131         info->drive = drive;
2132         info->driver = &ide_cdrom_driver;
2133         info->disk = g;
2134
2135         g->private_data = &info->driver;
2136
2137         drive->driver_data = info;
2138
2139         g->minors = 1;
2140         g->driverfs_dev = &drive->gendev;
2141         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2142         if (ide_cdrom_setup(drive)) {
2143                 ide_proc_unregister_driver(drive, &ide_cdrom_driver);
2144                 ide_cd_release(&info->kref);
2145                 goto failed;
2146         }
2147
2148         ide_cd_read_toc(drive, &sense);
2149         g->fops = &idecd_ops;
2150         g->flags |= GENHD_FL_REMOVABLE;
2151         add_disk(g);
2152         return 0;
2153
2154 out_free_cd:
2155         kfree(info);
2156 failed:
2157         return -ENODEV;
2158 }
2159
2160 static void __exit ide_cdrom_exit(void)
2161 {
2162         driver_unregister(&ide_cdrom_driver.gen_driver);
2163 }
2164
2165 static int __init ide_cdrom_init(void)
2166 {
2167         return driver_register(&ide_cdrom_driver.gen_driver);
2168 }
2169
2170 MODULE_ALIAS("ide:*m-cdrom*");
2171 MODULE_ALIAS("ide-cd");
2172 module_init(ide_cdrom_init);
2173 module_exit(ide_cdrom_exit);
2174 MODULE_LICENSE("GPL");