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 (valid < 0)
 186                                 valid = 0;
 187                         if (sector < get_capacity(info->disk) &&
 188                             drive->probed_capacity - sector < 4 * 75)
 189                                 set_capacity(info->disk, sector);
 190                 }
 191         }
 192
 193         ide_cd_log_error(drive->name, failed_command, sense);
 194 }
 195
 196 /* Initialize a ide-cd packet command request */
 197 void ide_cd_init_rq(ide_drive_t *drive, struct request *rq)
 198 {
 199         struct cdrom_info *cd = drive->driver_data;
 200
 201         ide_init_drive_cmd(rq);
 202         rq->cmd_type = REQ_TYPE_ATA_PC;
 203         rq->rq_disk = cd->disk;
 204 }
 205
 206 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
 207                                       struct request *failed_command)
 208 {
 209         struct cdrom_info *info         = drive->driver_data;
 210         struct request *rq              = &info->request_sense_request;
 211
 212         if (sense == NULL)
 213                 sense = &info->sense_data;
 214
 215         /* stuff the sense request in front of our current request */
 216         ide_cd_init_rq(drive, rq);
 217
 218         rq->data = sense;
 219         rq->cmd[0] = GPCMD_REQUEST_SENSE;
 220         rq->cmd[4] = 18;
 221         rq->data_len = 18;
 222
 223         rq->cmd_type = REQ_TYPE_SENSE;
 224
 225         /* NOTE! Save the failed command in "rq->buffer" */
 226         rq->buffer = (void *) failed_command;
 227
 228         (void) ide_do_drive_cmd(drive, rq, ide_preempt);
 229 }
 230
 231 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
 232 {
 233         struct request *rq = HWGROUP(drive)->rq;
 234         int nsectors = rq->hard_cur_sectors;
 235
 236         if (blk_sense_request(rq) && uptodate) {
 237                 /*
 238                  * For REQ_TYPE_SENSE, "rq->buffer" points to the original
 239                  * failed request
 240                  */
 241                 struct request *failed = (struct request *) rq->buffer;
 242                 struct cdrom_info *info = drive->driver_data;
 243                 void *sense = &info->sense_data;
 244                 unsigned long flags;
 245
 246                 if (failed) {
 247                         if (failed->sense) {
 248                                 sense = failed->sense;
 249                                 failed->sense_len = rq->sense_len;
 250                         }
 251                         cdrom_analyze_sense_data(drive, failed, sense);
 252                         /*
 253                          * now end the failed request
 254                          */
 255                         if (blk_fs_request(failed)) {
 256                                 if (ide_end_dequeued_request(drive, failed, 0,
 257                                                 failed->hard_nr_sectors))
 258                                         BUG();
 259                         } else {
 260                                 spin_lock_irqsave(&ide_lock, flags);
 261                                 if (__blk_end_request(failed, -EIO,
 262                                                       failed->data_len))
 263                                         BUG();
 264                                 spin_unlock_irqrestore(&ide_lock, flags);
 265                         }
 266                 } else
 267                         cdrom_analyze_sense_data(drive, NULL, sense);
 268         }
 269
 270         if (!rq->current_nr_sectors && blk_fs_request(rq))
 271                 uptodate = 1;
 272         /* make sure it's fully ended */
 273         if (blk_pc_request(rq))
 274                 nsectors = (rq->data_len + 511) >> 9;
 275         if (!nsectors)
 276                 nsectors = 1;
 277
 278         ide_end_request(drive, uptodate, nsectors);
 279 }
 280
 281 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
 282 {
 283         if (st & 0x80)
 284                 return;
 285         ide_dump_status(drive, msg, st);
 286 }
 287
 288 /*
 289  * Returns:
 290  * 0: if the request should be continued.
 291  * 1: if the request was ended.
 292  */
 293 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
 294 {
 295         struct request *rq = HWGROUP(drive)->rq;
 296         int stat, err, sense_key;
 297
 298         /* check for errors */
 299         stat = ide_read_status(drive);
 300
 301         if (stat_ret)
 302                 *stat_ret = stat;
 303
 304         if (OK_STAT(stat, good_stat, BAD_R_STAT))
 305                 return 0;
 306
 307         /* get the IDE error register */
 308         err = ide_read_error(drive);
 309         sense_key = err >> 4;
 310
 311         if (rq == NULL) {
 312                 printk(KERN_ERR "%s: missing rq in %s\n",
 313                                 drive->name, __func__);
 314                 return 1;
 315         }
 316
 317         if (blk_sense_request(rq)) {
 318                 /*
 319                  * We got an error trying to get sense info from the drive
 320                  * (probably while trying to recover from a former error).
 321                  * Just give up.
 322                  */
 323                 rq->cmd_flags |= REQ_FAILED;
 324                 cdrom_end_request(drive, 0);
 325                 ide_error(drive, "request sense failure", stat);
 326                 return 1;
 327
 328         } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
 329                 /* All other functions, except for READ. */
 330
 331                 /*
 332                  * if we have an error, pass back CHECK_CONDITION as the
 333                  * scsi status byte
 334                  */
 335                 if (blk_pc_request(rq) && !rq->errors)
 336                         rq->errors = SAM_STAT_CHECK_CONDITION;
 337
 338                 /* check for tray open */
 339                 if (sense_key == NOT_READY) {
 340                         cdrom_saw_media_change(drive);
 341                 } else if (sense_key == UNIT_ATTENTION) {
 342                         /* check for media change */
 343                         cdrom_saw_media_change(drive);
 344                         return 0;
 345                 } else if (sense_key == ILLEGAL_REQUEST &&
 346                            rq->cmd[0] == GPCMD_START_STOP_UNIT) {
 347                         /*
 348                          * Don't print error message for this condition--
 349                          * SFF8090i indicates that 5/24/00 is the correct
 350                          * response to a request to close the tray if the
 351                          * drive doesn't have that capability.
 352                          * cdrom_log_sense() knows this!
 353                          */
 354                 } else if (!(rq->cmd_flags & REQ_QUIET)) {
 355                         /* otherwise, print an error */
 356                         ide_dump_status(drive, "packet command error", stat);
 357                 }
 358
 359                 rq->cmd_flags |= REQ_FAILED;
 360
 361                 /*
 362                  * instead of playing games with moving completions around,
 363                  * remove failed request completely and end it when the
 364                  * request sense has completed
 365                  */
 366                 goto end_request;
 367
 368         } else if (blk_fs_request(rq)) {
 369                 int do_end_request = 0;
 370
 371                 /* handle errors from READ and WRITE requests */
 372
 373                 if (blk_noretry_request(rq))
 374                         do_end_request = 1;
 375
 376                 if (sense_key == NOT_READY) {
 377                         /* tray open */
 378                         if (rq_data_dir(rq) == READ) {
 379                                 cdrom_saw_media_change(drive);
 380
 381                                 /* fail the request */
 382                                 printk(KERN_ERR "%s: tray open\n", drive->name);
 383                                 do_end_request = 1;
 384                         } else {
 385                                 struct cdrom_info *info = drive->driver_data;
 386
 387                                 /*
 388                                  * Allow the drive 5 seconds to recover, some
 389                                  * devices will return this error while flushing
 390                                  * data from cache.
 391                                  */
 392                                 if (!rq->errors)
 393                                         info->write_timeout = jiffies +
 394                                                         ATAPI_WAIT_WRITE_BUSY;
 395                                 rq->errors = 1;
 396                                 if (time_after(jiffies, info->write_timeout))
 397                                         do_end_request = 1;
 398                                 else {
 399                                         unsigned long flags;
 400
 401                                         /*
 402                                          * take a breather relying on the unplug
 403                                          * timer to kick us again
 404                                          */
 405                                         spin_lock_irqsave(&ide_lock, flags);
 406                                         blk_plug_device(drive->queue);
 407                                         spin_unlock_irqrestore(&ide_lock,
 408                                                                 flags);
 409                                         return 1;
 410                                 }
 411                         }
 412                 } else if (sense_key == UNIT_ATTENTION) {
 413                         /* media change */
 414                         cdrom_saw_media_change(drive);
 415
 416                         /*
 417                          * Arrange to retry the request but be sure to give up
 418                          * if we've retried too many times.
 419                          */
 420                         if (++rq->errors > ERROR_MAX)
 421                                 do_end_request = 1;
 422                 } else if (sense_key == ILLEGAL_REQUEST ||
 423                            sense_key == DATA_PROTECT) {
 424                         /*
 425                          * No point in retrying after an illegal request or data
 426                          * protect error.
 427                          */
 428                         ide_dump_status_no_sense(drive, "command error", stat);
 429                         do_end_request = 1;
 430                 } else if (sense_key == MEDIUM_ERROR) {
 431                         /*
 432                          * No point in re-trying a zillion times on a bad
 433                          * sector. If we got here the error is not correctable.
 434                          */
 435                         ide_dump_status_no_sense(drive,
 436                                                  "media error (bad sector)",
 437                                                  stat);
 438                         do_end_request = 1;
 439                 } else if (sense_key == BLANK_CHECK) {
 440                         /* disk appears blank ?? */
 441                         ide_dump_status_no_sense(drive, "media error (blank)",
 442                                                  stat);
 443                         do_end_request = 1;
 444                 } else if ((err & ~ABRT_ERR) != 0) {
 445                         /* go to the default handler for other errors */
 446                         ide_error(drive, "cdrom_decode_status", stat);
 447                         return 1;
 448                 } else if ((++rq->errors > ERROR_MAX)) {
 449                         /* we've racked up too many retries, abort */
 450                         do_end_request = 1;
 451                 }
 452
 453                 /*
 454                  * End a request through request sense analysis when we have
 455                  * sense data. We need this in order to perform end of media
 456                  * processing.
 457                  */
 458                 if (do_end_request)
 459                         goto end_request;
 460
 461                 /*
 462                  * If we got a CHECK_CONDITION status, queue
 463                  * a request sense command.
 464                  */
 465                 if (stat & ERR_STAT)
 466                         cdrom_queue_request_sense(drive, NULL, NULL);
 467         } else {
 468                 blk_dump_rq_flags(rq, "ide-cd: bad rq");
 469                 cdrom_end_request(drive, 0);
 470         }
 471
 472         /* retry, or handle the next request */
 473         return 1;
 474
 475 end_request:
 476         if (stat & ERR_STAT) {
 477                 unsigned long flags;
 478
 479                 spin_lock_irqsave(&ide_lock, flags);
 480                 blkdev_dequeue_request(rq);
 481                 HWGROUP(drive)->rq = NULL;
 482                 spin_unlock_irqrestore(&ide_lock, flags);
 483
 484                 cdrom_queue_request_sense(drive, rq->sense, rq);
 485         } else
 486                 cdrom_end_request(drive, 0);
 487
 488         return 1;
 489 }
 490
 491 static int cdrom_timer_expiry(ide_drive_t *drive)
 492 {
 493         struct request *rq = HWGROUP(drive)->rq;
 494         unsigned long wait = 0;
 495
 496         /*
 497          * Some commands are *slow* and normally take a long time to complete.
 498          * Usually we can use the ATAPI "disconnect" to bypass this, but not all
 499          * commands/drives support that. Let ide_timer_expiry keep polling us
 500          * for these.
 501          */
 502         switch (rq->cmd[0]) {
 503         case GPCMD_BLANK:
 504         case GPCMD_FORMAT_UNIT:
 505         case GPCMD_RESERVE_RZONE_TRACK:
 506         case GPCMD_CLOSE_TRACK:
 507         case GPCMD_FLUSH_CACHE:
 508                 wait = ATAPI_WAIT_PC;
 509                 break;
 510         default:
 511                 if (!(rq->cmd_flags & REQ_QUIET))
 512                         printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n",
 513                                          rq->cmd[0]);
 514                 wait = 0;
 515                 break;
 516         }
 517         return wait;
 518 }
 519
 520 /*
 521  * Set up the device registers for transferring a packet command on DEV,
 522  * expecting to later transfer XFERLEN bytes.  HANDLER is the routine
 523  * which actually transfers the command to the drive.  If this is a
 524  * drq_interrupt device, this routine will arrange for HANDLER to be
 525  * called when the interrupt from the drive arrives.  Otherwise, HANDLER
 526  * will be called immediately after the drive is prepared for the transfer.
 527  */
 528 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
 529                                                   int xferlen,
 530                                                   ide_handler_t *handler)
 531 {
 532         ide_startstop_t startstop;
 533         struct cdrom_info *info = drive->driver_data;
 534         ide_hwif_t *hwif = drive->hwif;
 535
 536         /* wait for the controller to be idle */
 537         if (ide_wait_stat(&startstop, drive, 0, BUSY_STAT, WAIT_READY))
 538                 return startstop;
 539
 540         /* FIXME: for Virtual DMA we must check harder */
 541         if (info->dma)
 542                 info->dma = !hwif->dma_ops->dma_setup(drive);
 543
 544         /* set up the controller registers */
 545         ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL |
 546                            IDE_TFLAG_NO_SELECT_MASK, xferlen, info->dma);
 547
 548         if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) {
 549                 /* waiting for CDB interrupt, not DMA yet. */
 550                 if (info->dma)
 551                         drive->waiting_for_dma = 0;
 552
 553                 /* packet command */
 554                 ide_execute_command(drive, WIN_PACKETCMD, handler,
 555                                     ATAPI_WAIT_PC, cdrom_timer_expiry);
 556                 return ide_started;
 557         } else {
 558                 ide_execute_pkt_cmd(drive);
 559
 560                 return (*handler) (drive);
 561         }
 562 }
 563
 564 /*
 565  * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
 566  * registers must have already been prepared by cdrom_start_packet_command.
 567  * HANDLER is the interrupt handler to call when the command completes or
 568  * there's data ready.
 569  */
 570 #define ATAPI_MIN_CDB_BYTES 12
 571 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive,
 572                                           struct request *rq,
 573                                           ide_handler_t *handler)
 574 {
 575         ide_hwif_t *hwif = drive->hwif;
 576         int cmd_len;
 577         struct cdrom_info *info = drive->driver_data;
 578         ide_startstop_t startstop;
 579
 580         if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) {
 581                 /*
 582                  * Here we should have been called after receiving an interrupt
 583                  * from the device.  DRQ should how be set.
 584                  */
 585
 586                 /* check for errors */
 587                 if (cdrom_decode_status(drive, DRQ_STAT, NULL))
 588                         return ide_stopped;
 589
 590                 /* ok, next interrupt will be DMA interrupt */
 591                 if (info->dma)
 592                         drive->waiting_for_dma = 1;
 593         } else {
 594                 /* otherwise, we must wait for DRQ to get set */
 595                 if (ide_wait_stat(&startstop, drive, DRQ_STAT,
 596                                 BUSY_STAT, WAIT_READY))
 597                         return startstop;
 598         }
 599
 600         /* arm the interrupt handler */
 601         ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry);
 602
 603         /* ATAPI commands get padded out to 12 bytes minimum */
 604         cmd_len = COMMAND_SIZE(rq->cmd[0]);
 605         if (cmd_len < ATAPI_MIN_CDB_BYTES)
 606                 cmd_len = ATAPI_MIN_CDB_BYTES;
 607
 608         /* send the command to the device */
 609         hwif->output_data(drive, NULL, rq->cmd, cmd_len);
 610
 611         /* start the DMA if need be */
 612         if (info->dma)
 613                 hwif->dma_ops->dma_start(drive);
 614
 615         return ide_started;
 616 }
 617
 618 /*
 619  * Block read functions.
 620  */
 621 static void ide_cd_pad_transfer(ide_drive_t *drive, xfer_func_t *xf, int len)
 622 {
 623         while (len > 0) {
 624                 int dum = 0;
 625                 xf(drive, NULL, &dum, sizeof(dum));
 626                 len -= sizeof(dum);
 627         }
 628 }
 629
 630 static void ide_cd_drain_data(ide_drive_t *drive, int nsects)
 631 {
 632         while (nsects > 0) {
 633                 static char dum[SECTOR_SIZE];
 634
 635                 drive->hwif->input_data(drive, NULL, dum, sizeof(dum));
 636                 nsects--;
 637         }
 638 }
 639
 640 /*
 641  * Check the contents of the interrupt reason register from the cdrom
 642  * and attempt to recover if there are problems.  Returns  0 if everything's
 643  * ok; nonzero if the request has been terminated.
 644  */
 645 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
 646                                 int len, int ireason, int rw)
 647 {
 648         /*
 649          * ireason == 0: the drive wants to receive data from us
 650          * ireason == 2: the drive is expecting to transfer data to us
 651          */
 652         if (ireason == (!rw << 1))
 653                 return 0;
 654         else if (ireason == (rw << 1)) {
 655                 ide_hwif_t *hwif = drive->hwif;
 656                 xfer_func_t *xf;
 657
 658                 /* whoops... */
 659                 printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
 660                                 drive->name, __func__);
 661
 662                 xf = rw ? hwif->output_data : hwif->input_data;
 663                 ide_cd_pad_transfer(drive, xf, len);
 664         } else  if (rw == 0 && ireason == 1) {
 665                 /*
 666                  * Some drives (ASUS) seem to tell us that status info is
 667                  * available.  Just get it and ignore.
 668                  */
 669                 (void)ide_read_status(drive);
 670                 return 0;
 671         } else {
 672                 /* drive wants a command packet, or invalid ireason... */
 673                 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n",
 674                                 drive->name, __func__, ireason);
 675         }
 676
 677         if (rq->cmd_type == REQ_TYPE_ATA_PC)
 678                 rq->cmd_flags |= REQ_FAILED;
 679
 680         cdrom_end_request(drive, 0);
 681         return -1;
 682 }
 683
 684 /*
 685  * Assume that the drive will always provide data in multiples of at least
 686  * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
 687  */
 688 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
 689 {
 690         struct cdrom_info *cd = drive->driver_data;
 691
 692         if ((len % SECTOR_SIZE) == 0)
 693                 return 0;
 694
 695         printk(KERN_ERR "%s: %s: Bad transfer size %d\n",
 696                         drive->name, __func__, len);
 697
 698         if (cd->cd_flags & IDE_CD_FLAG_LIMIT_NFRAMES)
 699                 printk(KERN_ERR "  This drive is not supported by "
 700                                 "this version of the driver\n");
 701         else {
 702                 printk(KERN_ERR "  Trying to limit transfer sizes\n");
 703                 cd->cd_flags |= IDE_CD_FLAG_LIMIT_NFRAMES;
 704         }
 705
 706         return 1;
 707 }
 708
 709 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
 710
 711 /*
 712  * Routine to send a read/write packet command to the drive. This is usually
 713  * called directly from cdrom_start_{read,write}(). However, for drq_interrupt
 714  * devices, it is called from an interrupt when the drive is ready to accept
 715  * the command.
 716  */
 717 static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive)
 718 {
 719         struct request *rq = HWGROUP(drive)->rq;
 720
 721         if (rq_data_dir(rq) == READ) {
 722                 unsigned short sectors_per_frame =
 723                         queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 724                 int nskip = rq->sector & (sectors_per_frame - 1);
 725
 726                 /*
 727                  * If the requested sector doesn't start on a frame boundary,
 728                  * we must adjust the start of the transfer so that it does,
 729                  * and remember to skip the first few sectors.
 730                  *
 731                  * If the rq->current_nr_sectors field is larger than the size
 732                  * of the buffer, it will mean that we're to skip a number of
 733                  * sectors equal to the amount by which rq->current_nr_sectors
 734                  * is larger than the buffer size.
 735                  */
 736                 if (nskip > 0) {
 737                         /* sanity check... */
 738                         if (rq->current_nr_sectors !=
 739                             bio_cur_sectors(rq->bio)) {
 740                                 printk(KERN_ERR "%s: %s: buffer botch (%u)\n",
 741                                                 drive->name, __func__,
 742                                                 rq->current_nr_sectors);
 743                                 cdrom_end_request(drive, 0);
 744                                 return ide_stopped;
 745                         }
 746                         rq->current_nr_sectors += nskip;
 747                 }
 748         }
 749 #if 0
 750         else
 751                 /* the immediate bit */
 752                 rq->cmd[1] = 1 << 3;
 753 #endif
 754         /* set up the command */
 755         rq->timeout = ATAPI_WAIT_PC;
 756
 757         /* send the command to the drive and return */
 758         return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
 759 }
 760
 761 #define IDECD_SEEK_THRESHOLD    (1000)                  /* 1000 blocks */
 762 #define IDECD_SEEK_TIMER        (5 * WAIT_MIN_SLEEP)    /* 100 ms */
 763 #define IDECD_SEEK_TIMEOUT      (2 * WAIT_CMD)          /* 20 sec */
 764
 765 static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive)
 766 {
 767         struct cdrom_info *info = drive->driver_data;
 768         int stat;
 769         static int retry = 10;
 770
 771         if (cdrom_decode_status(drive, 0, &stat))
 772                 return ide_stopped;
 773
 774         info->cd_flags |= IDE_CD_FLAG_SEEKING;
 775
 776         if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) {
 777                 if (--retry == 0)
 778                         drive->dsc_overlap = 0;
 779         }
 780         return ide_stopped;
 781 }
 782
 783 static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive)
 784 {
 785         struct request *rq = HWGROUP(drive)->rq;
 786         sector_t frame = rq->sector;
 787
 788         sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS);
 789
 790         memset(rq->cmd, 0, sizeof(rq->cmd));
 791         rq->cmd[0] = GPCMD_SEEK;
 792         put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]);
 793
 794         rq->timeout = ATAPI_WAIT_PC;
 795         return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
 796 }
 797
 798 static ide_startstop_t cdrom_start_seek(ide_drive_t *drive, unsigned int block)
 799 {
 800         struct cdrom_info *info = drive->driver_data;
 801
 802         info->dma = 0;
 803         info->start_seek = jiffies;
 804         return cdrom_start_packet_command(drive, 0,
 805                                           cdrom_start_seek_continuation);
 806 }
 807
 808 /*
 809  * Fix up a possibly partially-processed request so that we can start it over
 810  * entirely, or even put it back on the request queue.
 811  */
 812 static void restore_request(struct request *rq)
 813 {
 814         if (rq->buffer != bio_data(rq->bio)) {
 815                 sector_t n =
 816                         (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
 817
 818                 rq->buffer = bio_data(rq->bio);
 819                 rq->nr_sectors += n;
 820                 rq->sector -= n;
 821         }
 822         rq->current_nr_sectors = bio_cur_sectors(rq->bio);
 823         rq->hard_cur_sectors = rq->current_nr_sectors;
 824         rq->hard_nr_sectors = rq->nr_sectors;
 825         rq->hard_sector = rq->sector;
 826         rq->q->prep_rq_fn(rq->q, rq);
 827 }
 828
 829 /*
 830  * All other packet commands.
 831  */
 832 static void ide_cd_request_sense_fixup(struct request *rq)
 833 {
 834         /*
 835          * Some of the trailing request sense fields are optional,
 836          * and some drives don't send them.  Sigh.
 837          */
 838         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 839             rq->data_len > 0 && rq->data_len <= 5)
 840                 while (rq->data_len > 0) {
 841                         *(u8 *)rq->data++ = 0;
 842                         --rq->data_len;
 843                 }
 844 }
 845
 846 int ide_cd_queue_pc(ide_drive_t *drive, struct request *rq)
 847 {
 848         struct request_sense sense;
 849         int retries = 10;
 850         unsigned int flags = rq->cmd_flags;
 851
 852         if (rq->sense == NULL)
 853                 rq->sense = &sense;
 854
 855         /* start of retry loop */
 856         do {
 857                 int error;
 858                 unsigned long time = jiffies;
 859                 rq->cmd_flags = flags;
 860
 861                 error = ide_do_drive_cmd(drive, rq, ide_wait);
 862                 time = jiffies - time;
 863
 864                 /*
 865                  * FIXME: we should probably abort/retry or something in case of
 866                  * failure.
 867                  */
 868                 if (rq->cmd_flags & REQ_FAILED) {
 869                         /*
 870                          * The request failed.  Retry if it was due to a unit
 871                          * attention status (usually means media was changed).
 872                          */
 873                         struct request_sense *reqbuf = rq->sense;
 874
 875                         if (reqbuf->sense_key == UNIT_ATTENTION)
 876                                 cdrom_saw_media_change(drive);
 877                         else if (reqbuf->sense_key == NOT_READY &&
 878                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 879                                 /*
 880                                  * The drive is in the process of loading
 881                                  * a disk.  Retry, but wait a little to give
 882                                  * the drive time to complete the load.
 883                                  */
 884                                 ssleep(2);
 885                         } else {
 886                                 /* otherwise, don't retry */
 887                                 retries = 0;
 888                         }
 889                         --retries;
 890                 }
 891
 892                 /* end of retry loop */
 893         } while ((rq->cmd_flags & REQ_FAILED) && retries >= 0);
 894
 895         /* return an error if the command failed */
 896         return (rq->cmd_flags & REQ_FAILED) ? -EIO : 0;
 897 }
 898
 899 /*
 900  * Called from blk_end_request_callback() after the data of the request is
 901  * completed and before the request itself is completed. By returning value '1',
 902  * blk_end_request_callback() returns immediately without completing it.
 903  */
 904 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
 905 {
 906         return 1;
 907 }
 908
 909 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 910 {
 911         ide_hwif_t *hwif = drive->hwif;
 912         struct cdrom_info *info = drive->driver_data;
 913         struct request *rq = HWGROUP(drive)->rq;
 914         xfer_func_t *xferfunc;
 915         ide_expiry_t *expiry = NULL;
 916         int dma_error = 0, dma, stat, ireason, len, thislen, uptodate = 0;
 917         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
 918         unsigned int timeout;
 919         u8 lowcyl, highcyl;
 920
 921         /* check for errors */
 922         dma = info->dma;
 923         if (dma) {
 924                 info->dma = 0;
 925                 dma_error = hwif->dma_ops->dma_end(drive);
 926                 if (dma_error) {
 927                         printk(KERN_ERR "%s: DMA %s error\n", drive->name,
 928                                         write ? "write" : "read");
 929                         ide_dma_off(drive);
 930                 }
 931         }
 932
 933         if (cdrom_decode_status(drive, 0, &stat))
 934                 return ide_stopped;
 935
 936         /* using dma, transfer is complete now */
 937         if (dma) {
 938                 if (dma_error)
 939                         return ide_error(drive, "dma error", stat);
 940                 if (blk_fs_request(rq)) {
 941                         ide_end_request(drive, 1, rq->nr_sectors);
 942                         return ide_stopped;
 943                 }
 944                 goto end_request;
 945         }
 946
 947         /* ok we fall to pio :/ */
 948         ireason = hwif->INB(hwif->io_ports.nsect_addr) & 0x3;
 949         lowcyl  = hwif->INB(hwif->io_ports.lbam_addr);
 950         highcyl = hwif->INB(hwif->io_ports.lbah_addr);
 951
 952         len = lowcyl + (256 * highcyl);
 953
 954         thislen = blk_fs_request(rq) ? len : rq->data_len;
 955         if (thislen > len)
 956                 thislen = len;
 957
 958         /* If DRQ is clear, the command has completed. */
 959         if ((stat & DRQ_STAT) == 0) {
 960                 if (blk_fs_request(rq)) {
 961                         /*
 962                          * If we're not done reading/writing, complain.
 963                          * Otherwise, complete the command normally.
 964                          */
 965                         uptodate = 1;
 966                         if (rq->current_nr_sectors > 0) {
 967                                 printk(KERN_ERR "%s: %s: data underrun "
 968                                                 "(%d blocks)\n",
 969                                                 drive->name, __func__,
 970                                                 rq->current_nr_sectors);
 971                                 if (!write)
 972                                         rq->cmd_flags |= REQ_FAILED;
 973                                 uptodate = 0;
 974                         }
 975                         cdrom_end_request(drive, uptodate);
 976                         return ide_stopped;
 977                 } else if (!blk_pc_request(rq)) {
 978                         ide_cd_request_sense_fixup(rq);
 979                         /* complain if we still have data left to transfer */
 980                         uptodate = rq->data_len ? 0 : 1;
 981                 }
 982                 goto end_request;
 983         }
 984
 985         /* check which way to transfer data */
 986         if (ide_cd_check_ireason(drive, rq, len, ireason, write))
 987                 return ide_stopped;
 988
 989         if (blk_fs_request(rq)) {
 990                 if (write == 0) {
 991                         int nskip;
 992
 993                         if (ide_cd_check_transfer_size(drive, len)) {
 994                                 cdrom_end_request(drive, 0);
 995                                 return ide_stopped;
 996                         }
 997
 998                         /*
 999                          * First, figure out if we need to bit-bucket
1000                          * any of the leading sectors.
1001                          */
1002                         nskip = min_t(int, rq->current_nr_sectors
1003                                            - bio_cur_sectors(rq->bio),
1004                                            thislen >> 9);
1005                         if (nskip > 0) {
1006                                 ide_cd_drain_data(drive, nskip);
1007                                 rq->current_nr_sectors -= nskip;
1008                                 thislen -= (nskip << 9);
1009                         }
1010                 }
1011         }
1012
1013         if (ireason == 0) {
1014                 write = 1;
1015                 xferfunc = hwif->output_data;
1016         } else {
1017                 write = 0;
1018                 xferfunc = hwif->input_data;
1019         }
1020
1021         /* transfer data */
1022         while (thislen > 0) {
1023                 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
1024                 int blen = rq->data_len;
1025
1026                 /* bio backed? */
1027                 if (rq->bio) {
1028                         if (blk_fs_request(rq)) {
1029                                 ptr = rq->buffer;
1030                                 blen = rq->current_nr_sectors << 9;
1031                         } else {
1032                                 ptr = bio_data(rq->bio);
1033                                 blen = bio_iovec(rq->bio)->bv_len;
1034                         }
1035                 }
1036
1037                 if (!ptr) {
1038                         if (blk_fs_request(rq) && !write)
1039                                 /*
1040                                  * If the buffers are full, pipe the rest into
1041                                  * oblivion.
1042                                  */
1043                                 ide_cd_drain_data(drive, thislen >> 9);
1044                         else {
1045                                 printk(KERN_ERR "%s: confused, missing data\n",
1046                                                 drive->name);
1047                                 blk_dump_rq_flags(rq, rq_data_dir(rq)
1048                                                   ? "cdrom_newpc_intr, write"
1049                                                   : "cdrom_newpc_intr, read");
1050                         }
1051                         break;
1052                 }
1053
1054                 if (blen > thislen)
1055                         blen = thislen;
1056
1057                 xferfunc(drive, NULL, ptr, blen);
1058
1059                 thislen -= blen;
1060                 len -= blen;
1061
1062                 if (blk_fs_request(rq)) {
1063                         rq->buffer += blen;
1064                         rq->nr_sectors -= (blen >> 9);
1065                         rq->current_nr_sectors -= (blen >> 9);
1066                         rq->sector += (blen >> 9);
1067
1068                         if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1069                                 cdrom_end_request(drive, 1);
1070                 } else {
1071                         rq->data_len -= blen;
1072
1073                         /*
1074                          * The request can't be completed until DRQ is cleared.
1075                          * So complete the data, but don't complete the request
1076                          * using the dummy function for the callback feature
1077                          * of blk_end_request_callback().
1078                          */
1079                         if (rq->bio)
1080                                 blk_end_request_callback(rq, 0, blen,
1081                                                  cdrom_newpc_intr_dummy_cb);
1082                         else
1083                                 rq->data += blen;
1084                 }
1085                 if (!write && blk_sense_request(rq))
1086                         rq->sense_len += blen;
1087         }
1088
1089         /* pad, if necessary */
1090         if (!blk_fs_request(rq) && len > 0)
1091                 ide_cd_pad_transfer(drive, xferfunc, len);
1092
1093         if (blk_pc_request(rq)) {
1094                 timeout = rq->timeout;
1095         } else {
1096                 timeout = ATAPI_WAIT_PC;
1097                 if (!blk_fs_request(rq))
1098                         expiry = cdrom_timer_expiry;
1099         }
1100
1101         ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1102         return ide_started;
1103
1104 end_request:
1105         if (blk_pc_request(rq)) {
1106                 unsigned long flags;
1107                 unsigned int dlen = rq->data_len;
1108
1109                 if (dma)
1110                         rq->data_len = 0;
1111
1112                 spin_lock_irqsave(&ide_lock, flags);
1113                 if (__blk_end_request(rq, 0, dlen))
1114                         BUG();
1115                 HWGROUP(drive)->rq = NULL;
1116                 spin_unlock_irqrestore(&ide_lock, flags);
1117         } else {
1118                 if (!uptodate)
1119                         rq->cmd_flags |= REQ_FAILED;
1120                 cdrom_end_request(drive, uptodate);
1121         }
1122         return ide_stopped;
1123 }
1124
1125 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1126 {
1127         struct cdrom_info *cd = drive->driver_data;
1128         int write = rq_data_dir(rq) == WRITE;
1129         unsigned short sectors_per_frame =
1130                 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1131
1132         if (write) {
1133                 /* disk has become write protected */
1134                 if (cd->disk->policy) {
1135                         cdrom_end_request(drive, 0);
1136                         return ide_stopped;
1137                 }
1138         } else {
1139                 /*
1140                  * We may be retrying this request after an error.  Fix up any
1141                  * weirdness which might be present in the request packet.
1142                  */
1143                 restore_request(rq);
1144         }
1145
1146         /* use DMA, if possible / writes *must* be hardware frame aligned */
1147         if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1148             (rq->sector & (sectors_per_frame - 1))) {
1149                 if (write) {
1150                         cdrom_end_request(drive, 0);
1151                         return ide_stopped;
1152                 }
1153                 cd->dma = 0;
1154         } else
1155                 cd->dma = drive->using_dma;
1156
1157         if (write)
1158                 cd->devinfo.media_written = 1;
1159
1160         /* start sending the read/write request to the drive */
1161         return cdrom_start_packet_command(drive, 32768, cdrom_start_rw_cont);
1162 }
1163
1164 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1165 {
1166         struct request *rq = HWGROUP(drive)->rq;
1167
1168         if (!rq->timeout)
1169                 rq->timeout = ATAPI_WAIT_PC;
1170
1171         return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1172 }
1173
1174 static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1175 {
1176         struct cdrom_info *info = drive->driver_data;
1177
1178         if (blk_pc_request(rq))
1179                 rq->cmd_flags |= REQ_QUIET;
1180         else
1181                 rq->cmd_flags &= ~REQ_FAILED;
1182
1183         info->dma = 0;
1184
1185         /* sg request */
1186         if (rq->bio) {
1187                 int mask = drive->queue->dma_alignment;
1188                 unsigned long addr =
1189                         (unsigned long)page_address(bio_page(rq->bio));
1190
1191                 info->dma = drive->using_dma;
1192
1193                 /*
1194                  * check if dma is safe
1195                  *
1196                  * NOTE! The "len" and "addr" checks should possibly have
1197                  * separate masks.
1198                  */
1199                 if ((rq->data_len & 15) || (addr & mask))
1200                         info->dma = 0;
1201         }
1202
1203         /* start sending the command to the drive */
1204         return cdrom_start_packet_command(drive, rq->data_len,
1205                                           cdrom_do_newpc_cont);
1206 }
1207
1208 /*
1209  * cdrom driver request routine.
1210  */
1211 static ide_startstop_t ide_do_rw_cdrom(ide_drive_t *drive, struct request *rq,
1212                                         sector_t block)
1213 {
1214         ide_startstop_t action;
1215         struct cdrom_info *info = drive->driver_data;
1216
1217         if (blk_fs_request(rq)) {
1218                 if (info->cd_flags & IDE_CD_FLAG_SEEKING) {
1219                         unsigned long elapsed = jiffies - info->start_seek;
1220                         int stat = ide_read_status(drive);
1221
1222                         if ((stat & SEEK_STAT) != SEEK_STAT) {
1223                                 if (elapsed < IDECD_SEEK_TIMEOUT) {
1224                                         ide_stall_queue(drive,
1225                                                         IDECD_SEEK_TIMER);
1226                                         return ide_stopped;
1227                                 }
1228                                 printk(KERN_ERR "%s: DSC timeout\n",
1229                                                 drive->name);
1230                         }
1231                         info->cd_flags &= ~IDE_CD_FLAG_SEEKING;
1232                 }
1233                 if (rq_data_dir(rq) == READ &&
1234                     IDE_LARGE_SEEK(info->last_block, block,
1235                                    IDECD_SEEK_THRESHOLD) &&
1236                     drive->dsc_overlap)
1237                         action = cdrom_start_seek(drive, block);
1238                 else
1239                         action = cdrom_start_rw(drive, rq);
1240                 info->last_block = block;
1241                 return action;
1242         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1243                    rq->cmd_type == REQ_TYPE_ATA_PC) {
1244                 return cdrom_do_block_pc(drive, rq);
1245         } else if (blk_special_request(rq)) {
1246                 /* right now this can only be a reset... */
1247                 cdrom_end_request(drive, 1);
1248                 return ide_stopped;
1249         }
1250
1251         blk_dump_rq_flags(rq, "ide-cd bad flags");
1252         cdrom_end_request(drive, 0);
1253         return ide_stopped;
1254 }
1255
1256
1257
1258 /*
1259  * Ioctl handling.
1260  *
1261  * Routines which queue packet commands take as a final argument a pointer to a
1262  * request_sense struct. If execution of the command results in an error with a
1263  * CHECK CONDITION status, this structure will be filled with the results of the
1264  * subsequent request sense command. The pointer can also be NULL, in which case
1265  * no sense information is returned.
1266  */
1267 static void msf_from_bcd(struct atapi_msf *msf)
1268 {
1269         msf->minute = BCD2BIN(msf->minute);
1270         msf->second = BCD2BIN(msf->second);
1271         msf->frame  = BCD2BIN(msf->frame);
1272 }
1273
1274 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1275 {
1276         struct request req;
1277         struct cdrom_info *info = drive->driver_data;
1278         struct cdrom_device_info *cdi = &info->devinfo;
1279
1280         ide_cd_init_rq(drive, &req);
1281
1282         req.sense = sense;
1283         req.cmd[0] = GPCMD_TEST_UNIT_READY;
1284         req.cmd_flags |= REQ_QUIET;
1285
1286         /*
1287          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1288          * instead of supporting the LOAD_UNLOAD opcode.
1289          */
1290         req.cmd[7] = cdi->sanyo_slot % 3;
1291
1292         return ide_cd_queue_pc(drive, &req);
1293 }
1294
1295 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1296                                unsigned long *sectors_per_frame,
1297                                struct request_sense *sense)
1298 {
1299         struct {
1300                 __u32 lba;
1301                 __u32 blocklen;
1302         } capbuf;
1303
1304         int stat;
1305         struct request req;
1306
1307         ide_cd_init_rq(drive, &req);
1308
1309         req.sense = sense;
1310         req.cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1311         req.data = (char *)&capbuf;
1312         req.data_len = sizeof(capbuf);
1313         req.cmd_flags |= REQ_QUIET;
1314
1315         stat = ide_cd_queue_pc(drive, &req);
1316         if (stat == 0) {
1317                 *capacity = 1 + be32_to_cpu(capbuf.lba);
1318                 *sectors_per_frame =
1319                         be32_to_cpu(capbuf.blocklen) >> SECTOR_BITS;
1320         }
1321
1322         return stat;
1323 }
1324
1325 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1326                                 int format, char *buf, int buflen,
1327                                 struct request_sense *sense)
1328 {
1329         struct request req;
1330
1331         ide_cd_init_rq(drive, &req);
1332
1333         req.sense = sense;
1334         req.data =  buf;
1335         req.data_len = buflen;
1336         req.cmd_flags |= REQ_QUIET;
1337         req.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1338         req.cmd[6] = trackno;
1339         req.cmd[7] = (buflen >> 8);
1340         req.cmd[8] = (buflen & 0xff);
1341         req.cmd[9] = (format << 6);
1342
1343         if (msf_flag)
1344                 req.cmd[1] = 2;
1345
1346         return ide_cd_queue_pc(drive, &req);
1347 }
1348
1349 /* Try to read the entire TOC for the disk into our internal buffer. */
1350 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1351 {
1352         int stat, ntracks, i;
1353         struct cdrom_info *info = drive->driver_data;
1354         struct cdrom_device_info *cdi = &info->devinfo;
1355         struct atapi_toc *toc = info->toc;
1356         struct {
1357                 struct atapi_toc_header hdr;
1358                 struct atapi_toc_entry  ent;
1359         } ms_tmp;
1360         long last_written;
1361         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1362
1363         if (toc == NULL) {
1364                 /* try to allocate space */
1365                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1366                 if (toc == NULL) {
1367                         printk(KERN_ERR "%s: No cdrom TOC buffer!\n",
1368                                         drive->name);
1369                         return -ENOMEM;
1370                 }
1371                 info->toc = toc;
1372         }
1373
1374         /*
1375          * Check to see if the existing data is still valid. If it is,
1376          * just return.
1377          */
1378         (void) cdrom_check_status(drive, sense);
1379
1380         if (info->cd_flags & IDE_CD_FLAG_TOC_VALID)
1381                 return 0;
1382
1383         /* try to get the total cdrom capacity and sector size */
1384         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1385                                    sense);
1386         if (stat)
1387                 toc->capacity = 0x1fffff;
1388
1389         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1390         /* save a private copy of the TOC capacity for error handling */
1391         drive->probed_capacity = toc->capacity * sectors_per_frame;
1392
1393         blk_queue_hardsect_size(drive->queue,
1394                                 sectors_per_frame << SECTOR_BITS);
1395
1396         /* first read just the header, so we know how long the TOC is */
1397         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1398                                     sizeof(struct atapi_toc_header), sense);
1399         if (stat)
1400                 return stat;
1401
1402         if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1403                 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1404                 toc->hdr.last_track  = BCD2BIN(toc->hdr.last_track);
1405         }
1406
1407         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1408         if (ntracks <= 0)
1409                 return -EIO;
1410         if (ntracks > MAX_TRACKS)
1411                 ntracks = MAX_TRACKS;
1412
1413         /* now read the whole schmeer */
1414         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1415                                   (char *)&toc->hdr,
1416                                    sizeof(struct atapi_toc_header) +
1417                                    (ntracks + 1) *
1418                                    sizeof(struct atapi_toc_entry), sense);
1419
1420         if (stat && toc->hdr.first_track > 1) {
1421                 /*
1422                  * Cds with CDI tracks only don't have any TOC entries, despite
1423                  * of this the returned values are
1424                  * first_track == last_track = number of CDI tracks + 1,
1425                  * so that this case is indistinguishable from the same layout
1426                  * plus an additional audio track. If we get an error for the
1427                  * regular case, we assume a CDI without additional audio
1428                  * tracks. In this case the readable TOC is empty (CDI tracks
1429                  * are not included) and only holds the Leadout entry.
1430                  *
1431                  * Heiko Eißfeldt.
1432                  */
1433                 ntracks = 0;
1434                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1435                                            (char *)&toc->hdr,
1436                                            sizeof(struct atapi_toc_header) +
1437                                            (ntracks + 1) *
1438                                            sizeof(struct atapi_toc_entry),
1439                                            sense);
1440                 if (stat)
1441                         return stat;
1442
1443                 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1444                         toc->hdr.first_track = (u8)BIN2BCD(CDROM_LEADOUT);
1445                         toc->hdr.last_track = (u8)BIN2BCD(CDROM_LEADOUT);
1446                 } else {
1447                         toc->hdr.first_track = CDROM_LEADOUT;
1448                         toc->hdr.last_track = CDROM_LEADOUT;
1449                 }
1450         }
1451
1452         if (stat)
1453                 return stat;
1454
1455         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1456
1457         if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1458                 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1459                 toc->hdr.last_track  = BCD2BIN(toc->hdr.last_track);
1460         }
1461
1462         for (i = 0; i <= ntracks; i++) {
1463                 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1464                         if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD)
1465                                 toc->ent[i].track = BCD2BIN(toc->ent[i].track);
1466                         msf_from_bcd(&toc->ent[i].addr.msf);
1467                 }
1468                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1469                                                   toc->ent[i].addr.msf.second,
1470                                                   toc->ent[i].addr.msf.frame);
1471         }
1472
1473         if (toc->hdr.first_track != CDROM_LEADOUT) {
1474                 /* read the multisession information */
1475                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1476                                            sizeof(ms_tmp), sense);
1477                 if (stat)
1478                         return stat;
1479
1480                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1481         } else {
1482                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1483                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1484                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1485         }
1486
1487         if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1488                 /* re-read multisession information using MSF format */
1489                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1490                                            sizeof(ms_tmp), sense);
1491                 if (stat)
1492                         return stat;
1493
1494                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1495                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1496                                                    ms_tmp.ent.addr.msf.second,
1497                                                    ms_tmp.ent.addr.msf.frame);
1498         }
1499
1500         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1501
1502         /* now try to get the total cdrom capacity */
1503         stat = cdrom_get_last_written(cdi, &last_written);
1504         if (!stat && (last_written > toc->capacity)) {
1505                 toc->capacity = last_written;
1506                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1507                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1508         }
1509
1510         /* Remember that we've read this stuff. */
1511         info->cd_flags |= IDE_CD_FLAG_TOC_VALID;
1512
1513         return 0;
1514 }
1515
1516 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1517 {
1518         struct cdrom_info *info = drive->driver_data;
1519         struct cdrom_device_info *cdi = &info->devinfo;
1520         struct packet_command cgc;
1521         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1522
1523         if ((info->cd_flags & IDE_CD_FLAG_FULL_CAPS_PAGE) == 0)
1524                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1525
1526         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1527         do {
1528                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1529                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1530                 if (!stat)
1531                         break;
1532         } while (--attempts);
1533         return stat;
1534 }
1535
1536 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1537 {
1538         struct cdrom_info *cd = drive->driver_data;
1539         u16 curspeed, maxspeed;
1540
1541         curspeed = *(u16 *)&buf[8 + 14];
1542         maxspeed = *(u16 *)&buf[8 +  8];
1543
1544         if (cd->cd_flags & IDE_CD_FLAG_LE_SPEED_FIELDS) {
1545                 curspeed = le16_to_cpu(curspeed);
1546                 maxspeed = le16_to_cpu(maxspeed);
1547         } else {
1548                 curspeed = be16_to_cpu(curspeed);
1549                 maxspeed = be16_to_cpu(maxspeed);
1550         }
1551
1552         cd->current_speed = (curspeed + (176/2)) / 176;
1553         cd->max_speed = (maxspeed + (176/2)) / 176;
1554 }
1555
1556 #define IDE_CD_CAPABILITIES \
1557         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1558          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1559          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1560          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1561          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1562
1563 static struct cdrom_device_ops ide_cdrom_dops = {
1564         .open                   = ide_cdrom_open_real,
1565         .release                = ide_cdrom_release_real,
1566         .drive_status           = ide_cdrom_drive_status,
1567         .media_changed          = ide_cdrom_check_media_change_real,
1568         .tray_move              = ide_cdrom_tray_move,
1569         .lock_door              = ide_cdrom_lock_door,
1570         .select_speed           = ide_cdrom_select_speed,
1571         .get_last_session       = ide_cdrom_get_last_session,
1572         .get_mcn                = ide_cdrom_get_mcn,
1573         .reset                  = ide_cdrom_reset,
1574         .audio_ioctl            = ide_cdrom_audio_ioctl,
1575         .capability             = IDE_CD_CAPABILITIES,
1576         .generic_packet         = ide_cdrom_packet,
1577 };
1578
1579 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1580 {
1581         struct cdrom_info *info = drive->driver_data;
1582         struct cdrom_device_info *devinfo = &info->devinfo;
1583
1584         devinfo->ops = &ide_cdrom_dops;
1585         devinfo->speed = info->current_speed;
1586         devinfo->capacity = nslots;
1587         devinfo->handle = drive;
1588         strcpy(devinfo->name, drive->name);
1589
1590         if (info->cd_flags & IDE_CD_FLAG_NO_SPEED_SELECT)
1591                 devinfo->mask |= CDC_SELECT_SPEED;
1592
1593         devinfo->disk = info->disk;
1594         return register_cdrom(devinfo);
1595 }
1596
1597 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1598 {
1599         struct cdrom_info *cd = drive->driver_data;
1600         struct cdrom_device_info *cdi = &cd->devinfo;
1601         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1602         mechtype_t mechtype;
1603         int nslots = 1;
1604
1605         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1606                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1607                      CDC_MO_DRIVE | CDC_RAM);
1608
1609         if (drive->media == ide_optical) {
1610                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1611                 printk(KERN_ERR "%s: ATAPI magneto-optical drive\n",
1612                                 drive->name);
1613                 return nslots;
1614         }
1615
1616         if (cd->cd_flags & IDE_CD_FLAG_PRE_ATAPI12) {
1617                 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
1618                 cdi->mask &= ~CDC_PLAY_AUDIO;
1619                 return nslots;
1620         }
1621
1622         /*
1623          * We have to cheat a little here. the packet will eventually be queued
1624          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1625          * Since this device hasn't been registered with the Uniform layer yet,
1626          * it can't do this. Same goes for cdi->ops.
1627          */
1628         cdi->handle = drive;
1629         cdi->ops = &ide_cdrom_dops;
1630
1631         if (ide_cdrom_get_capabilities(drive, buf))
1632                 return 0;
1633
1634         if ((buf[8 + 6] & 0x01) == 0)
1635                 cd->cd_flags |= IDE_CD_FLAG_NO_DOORLOCK;
1636         if (buf[8 + 6] & 0x08)
1637                 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
1638         if (buf[8 + 3] & 0x01)
1639                 cdi->mask &= ~CDC_CD_R;
1640         if (buf[8 + 3] & 0x02)
1641                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1642         if (buf[8 + 2] & 0x38)
1643                 cdi->mask &= ~CDC_DVD;
1644         if (buf[8 + 3] & 0x20)
1645                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1646         if (buf[8 + 3] & 0x10)
1647                 cdi->mask &= ~CDC_DVD_R;
1648         if ((buf[8 + 4] & 0x01) || (cd->cd_flags & IDE_CD_FLAG_PLAY_AUDIO_OK))
1649                 cdi->mask &= ~CDC_PLAY_AUDIO;
1650
1651         mechtype = buf[8 + 6] >> 5;
1652         if (mechtype == mechtype_caddy || mechtype == mechtype_popup)
1653                 cdi->mask |= CDC_CLOSE_TRAY;
1654
1655         if (cdi->sanyo_slot > 0) {
1656                 cdi->mask &= ~CDC_SELECT_DISC;
1657                 nslots = 3;
1658         } else if (mechtype == mechtype_individual_changer ||
1659                    mechtype == mechtype_cartridge_changer) {
1660                 nslots = cdrom_number_of_slots(cdi);
1661                 if (nslots > 1)
1662                         cdi->mask &= ~CDC_SELECT_DISC;
1663         }
1664
1665         ide_cdrom_update_speed(drive, buf);
1666
1667         printk(KERN_INFO "%s: ATAPI", drive->name);
1668
1669         /* don't print speed if the drive reported 0 */
1670         if (cd->max_speed)
1671                 printk(KERN_CONT " %dX", cd->max_speed);
1672
1673         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1674
1675         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1676                 printk(KERN_CONT " DVD%s%s",
1677                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1678                                  (cdi->mask & CDC_DVD_RAM) ? "" : "-RAM");
1679
1680         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1681                 printk(KERN_CONT " CD%s%s",
1682                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1683                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1684
1685         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1686                 printk(KERN_CONT " changer w/%d slots", nslots);
1687         else
1688                 printk(KERN_CONT " drive");
1689
1690         printk(KERN_CONT ", %dkB Cache\n", be16_to_cpu(*(u16 *)&buf[8 + 12]));
1691
1692         return nslots;
1693 }
1694
1695 /* standard prep_rq_fn that builds 10 byte cmds */
1696 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1697 {
1698         int hard_sect = queue_hardsect_size(q);
1699         long block = (long)rq->hard_sector / (hard_sect >> 9);
1700         unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1701
1702         memset(rq->cmd, 0, sizeof(rq->cmd));
1703
1704         if (rq_data_dir(rq) == READ)
1705                 rq->cmd[0] = GPCMD_READ_10;
1706         else
1707                 rq->cmd[0] = GPCMD_WRITE_10;
1708
1709         /*
1710          * fill in lba
1711          */
1712         rq->cmd[2] = (block >> 24) & 0xff;
1713         rq->cmd[3] = (block >> 16) & 0xff;
1714         rq->cmd[4] = (block >>  8) & 0xff;
1715         rq->cmd[5] = block & 0xff;
1716
1717         /*
1718          * and transfer length
1719          */
1720         rq->cmd[7] = (blocks >> 8) & 0xff;
1721         rq->cmd[8] = blocks & 0xff;
1722         rq->cmd_len = 10;
1723         return BLKPREP_OK;
1724 }
1725
1726 /*
1727  * Most of the SCSI commands are supported directly by ATAPI devices.
1728  * This transform handles the few exceptions.
1729  */
1730 static int ide_cdrom_prep_pc(struct request *rq)
1731 {
1732         u8 *c = rq->cmd;
1733
1734         /* transform 6-byte read/write commands to the 10-byte version */
1735         if (c[0] == READ_6 || c[0] == WRITE_6) {
1736                 c[8] = c[4];
1737                 c[5] = c[3];
1738                 c[4] = c[2];
1739                 c[3] = c[1] & 0x1f;
1740                 c[2] = 0;
1741                 c[1] &= 0xe0;
1742                 c[0] += (READ_10 - READ_6);
1743                 rq->cmd_len = 10;
1744                 return BLKPREP_OK;
1745         }
1746
1747         /*
1748          * it's silly to pretend we understand 6-byte sense commands, just
1749          * reject with ILLEGAL_REQUEST and the caller should take the
1750          * appropriate action
1751          */
1752         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1753                 rq->errors = ILLEGAL_REQUEST;
1754                 return BLKPREP_KILL;
1755         }
1756
1757         return BLKPREP_OK;
1758 }
1759
1760 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1761 {
1762         if (blk_fs_request(rq))
1763                 return ide_cdrom_prep_fs(q, rq);
1764         else if (blk_pc_request(rq))
1765                 return ide_cdrom_prep_pc(rq);
1766
1767         return 0;
1768 }
1769
1770 struct cd_list_entry {
1771         const char      *id_model;
1772         const char      *id_firmware;
1773         unsigned int    cd_flags;
1774 };
1775
1776 #ifdef CONFIG_IDE_PROC_FS
1777 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1778 {
1779         unsigned long capacity, sectors_per_frame;
1780
1781         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1782                 return 0;
1783
1784         return capacity * sectors_per_frame;
1785 }
1786
1787 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1788                                         int count, int *eof, void *data)
1789 {
1790         ide_drive_t *drive = data;
1791         int len;
1792
1793         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1794         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1795 }
1796
1797 static ide_proc_entry_t idecd_proc[] = {
1798         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1799         { NULL, 0, NULL, NULL }
1800 };
1801
1802 static void ide_cdrom_add_settings(ide_drive_t *drive)
1803 {
1804         ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1,
1805                         &drive->dsc_overlap, NULL);
1806 }
1807 #else
1808 static inline void ide_cdrom_add_settings(ide_drive_t *drive) { ; }
1809 #endif
1810
1811 static const struct cd_list_entry ide_cd_quirks_list[] = {
1812         /* Limit transfer size per interrupt. */
1813         { "SAMSUNG CD-ROM SCR-2430", NULL,   IDE_CD_FLAG_LIMIT_NFRAMES      },
1814         { "SAMSUNG CD-ROM SCR-2432", NULL,   IDE_CD_FLAG_LIMIT_NFRAMES      },
1815         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1816         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_CD_FLAG_NO_SPEED_SELECT    },
1817         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1818         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_CD_FLAG_TOCADDR_AS_BCD |
1819                                              IDE_CD_FLAG_PRE_ATAPI12,       },
1820         /* Vertos 300, some versions of this drive like to talk BCD. */
1821         { "V003S0DS",                NULL,   IDE_CD_FLAG_VERTOS_300_SSD,    },
1822         /* Vertos 600 ESD. */
1823         { "V006E0DS",                NULL,   IDE_CD_FLAG_VERTOS_600_ESD,    },
1824         /*
1825          * Sanyo 3 CD changer uses a non-standard command for CD changing
1826          * (by default standard ATAPI support for CD changers is used).
1827          */
1828         { "CD-ROM CDR-C3 G",         NULL,   IDE_CD_FLAG_SANYO_3CD          },
1829         { "CD-ROM CDR-C3G",          NULL,   IDE_CD_FLAG_SANYO_3CD          },
1830         { "CD-ROM CDR_C36",          NULL,   IDE_CD_FLAG_SANYO_3CD          },
1831         /* Stingray 8X CD-ROM. */
1832         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_CD_FLAG_PRE_ATAPI12},
1833         /*
1834          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1835          * mode sense page capabilities size, but older drives break.
1836          */
1837         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_CD_FLAG_FULL_CAPS_PAGE  },
1838         { "WPI CDS-32X",                NULL,   IDE_CD_FLAG_FULL_CAPS_PAGE  },
1839         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1840         { "",                        "241N", IDE_CD_FLAG_LE_SPEED_FIELDS    },
1841         /*
1842          * Some drives used by Apple don't advertise audio play
1843          * but they do support reading TOC & audio datas.
1844          */
1845         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1846         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1847         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1848         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1849         { "Optiarc DVD RW AD-5200A", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1850         { NULL, NULL, 0 }
1851 };
1852
1853 static unsigned int ide_cd_flags(struct hd_driveid *id)
1854 {
1855         const struct cd_list_entry *cle = ide_cd_quirks_list;
1856
1857         while (cle->id_model) {
1858                 if (strcmp(cle->id_model, id->model) == 0 &&
1859                     (cle->id_firmware == NULL ||
1860                      strstr(id->fw_rev, cle->id_firmware)))
1861                         return cle->cd_flags;
1862                 cle++;
1863         }
1864
1865         return 0;
1866 }
1867
1868 static int ide_cdrom_setup(ide_drive_t *drive)
1869 {
1870         struct cdrom_info *cd = drive->driver_data;
1871         struct cdrom_device_info *cdi = &cd->devinfo;
1872         struct hd_driveid *id = drive->id;
1873         int nslots;
1874
1875         blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1876         blk_queue_dma_alignment(drive->queue, 31);
1877         drive->queue->unplug_delay = (1 * HZ) / 1000;
1878         if (!drive->queue->unplug_delay)
1879                 drive->queue->unplug_delay = 1;
1880
1881         drive->special.all      = 0;
1882
1883         cd->cd_flags = IDE_CD_FLAG_MEDIA_CHANGED | IDE_CD_FLAG_NO_EJECT |
1884                        ide_cd_flags(id);
1885
1886         if ((id->config & 0x0060) == 0x20)
1887                 cd->cd_flags |= IDE_CD_FLAG_DRQ_INTERRUPT;
1888
1889         if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_300_SSD) &&
1890             id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1891                 cd->cd_flags |= (IDE_CD_FLAG_TOCTRACKS_AS_BCD |
1892                                  IDE_CD_FLAG_TOCADDR_AS_BCD);
1893         else if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_600_ESD) &&
1894                  id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1895                 cd->cd_flags |= IDE_CD_FLAG_TOCTRACKS_AS_BCD;
1896         else if (cd->cd_flags & IDE_CD_FLAG_SANYO_3CD)
1897                 /* 3 => use CD in slot 0 */
1898                 cdi->sanyo_slot = 3;
1899
1900         nslots = ide_cdrom_probe_capabilities(drive);
1901
1902         /* set correct block size */
1903         blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1904
1905         drive->dsc_overlap = (drive->next != drive);
1906
1907         if (ide_cdrom_register(drive, nslots)) {
1908                 printk(KERN_ERR "%s: %s failed to register device with the"
1909                                 " cdrom driver.\n", drive->name, __func__);
1910                 cd->devinfo.handle = NULL;
1911                 return 1;
1912         }
1913         ide_cdrom_add_settings(drive);
1914         return 0;
1915 }
1916
1917 static void ide_cd_remove(ide_drive_t *drive)
1918 {
1919         struct cdrom_info *info = drive->driver_data;
1920
1921         ide_proc_unregister_driver(drive, info->driver);
1922
1923         del_gendisk(info->disk);
1924
1925         ide_cd_put(info);
1926 }
1927
1928 static void ide_cd_release(struct kref *kref)
1929 {
1930         struct cdrom_info *info = to_ide_cd(kref);
1931         struct cdrom_device_info *devinfo = &info->devinfo;
1932         ide_drive_t *drive = info->drive;
1933         struct gendisk *g = info->disk;
1934
1935         kfree(info->toc);
1936         if (devinfo->handle == drive)
1937                 unregister_cdrom(devinfo);
1938         drive->dsc_overlap = 0;
1939         drive->driver_data = NULL;
1940         blk_queue_prep_rq(drive->queue, NULL);
1941         g->private_data = NULL;
1942         put_disk(g);
1943         kfree(info);
1944 }
1945
1946 static int ide_cd_probe(ide_drive_t *);
1947
1948 static ide_driver_t ide_cdrom_driver = {
1949         .gen_driver = {
1950                 .owner          = THIS_MODULE,
1951                 .name           = "ide-cdrom",
1952                 .bus            = &ide_bus_type,
1953         },
1954         .probe                  = ide_cd_probe,
1955         .remove                 = ide_cd_remove,
1956         .version                = IDECD_VERSION,
1957         .media                  = ide_cdrom,
1958         .supports_dsc_overlap   = 1,
1959         .do_request             = ide_do_rw_cdrom,
1960         .end_request            = ide_end_request,
1961         .error                  = __ide_error,
1962         .abort                  = __ide_abort,
1963 #ifdef CONFIG_IDE_PROC_FS
1964         .proc                   = idecd_proc,
1965 #endif
1966 };
1967
1968 static int idecd_open(struct inode *inode, struct file *file)
1969 {
1970         struct gendisk *disk = inode->i_bdev->bd_disk;
1971         struct cdrom_info *info;
1972         int rc = -ENOMEM;
1973
1974         info = ide_cd_get(disk);
1975         if (!info)
1976                 return -ENXIO;
1977
1978         rc = cdrom_open(&info->devinfo, inode, file);
1979
1980         if (rc < 0)
1981                 ide_cd_put(info);
1982
1983         return rc;
1984 }
1985
1986 static int idecd_release(struct inode *inode, struct file *file)
1987 {
1988         struct gendisk *disk = inode->i_bdev->bd_disk;
1989         struct cdrom_info *info = ide_cd_g(disk);
1990
1991         cdrom_release(&info->devinfo, file);
1992
1993         ide_cd_put(info);
1994
1995         return 0;
1996 }
1997
1998 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1999 {
2000         struct packet_command cgc;
2001         char buffer[16];
2002         int stat;
2003         char spindown;
2004
2005         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
2006                 return -EFAULT;
2007
2008         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2009
2010         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2011         if (stat)
2012                 return stat;
2013
2014         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
2015         return cdrom_mode_select(cdi, &cgc);
2016 }
2017
2018 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2019 {
2020         struct packet_command cgc;
2021         char buffer[16];
2022         int stat;
2023         char spindown;
2024
2025         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2026
2027         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2028         if (stat)
2029                 return stat;
2030
2031         spindown = buffer[11] & 0x0f;
2032         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
2033                 return -EFAULT;
2034         return 0;
2035 }
2036
2037 static int idecd_ioctl(struct inode *inode, struct file *file,
2038                         unsigned int cmd, unsigned long arg)
2039 {
2040         struct block_device *bdev = inode->i_bdev;
2041         struct cdrom_info *info = ide_cd_g(bdev->bd_disk);
2042         int err;
2043
2044         switch (cmd) {
2045         case CDROMSETSPINDOWN:
2046                 return idecd_set_spindown(&info->devinfo, arg);
2047         case CDROMGETSPINDOWN:
2048                 return idecd_get_spindown(&info->devinfo, arg);
2049         default:
2050                 break;
2051         }
2052
2053         err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg);
2054         if (err == -EINVAL)
2055                 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg);
2056
2057         return err;
2058 }
2059
2060 static int idecd_media_changed(struct gendisk *disk)
2061 {
2062         struct cdrom_info *info = ide_cd_g(disk);
2063         return cdrom_media_changed(&info->devinfo);
2064 }
2065
2066 static int idecd_revalidate_disk(struct gendisk *disk)
2067 {
2068         struct cdrom_info *info = ide_cd_g(disk);
2069         struct request_sense sense;
2070
2071         ide_cd_read_toc(info->drive, &sense);
2072
2073         return  0;
2074 }
2075
2076 static struct block_device_operations idecd_ops = {
2077         .owner                  = THIS_MODULE,
2078         .open                   = idecd_open,
2079         .release                = idecd_release,
2080         .ioctl                  = idecd_ioctl,
2081         .media_changed          = idecd_media_changed,
2082         .revalidate_disk        = idecd_revalidate_disk
2083 };
2084
2085 /* module options */
2086 static char *ignore;
2087
2088 module_param(ignore, charp, 0400);
2089 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2090
2091 static int ide_cd_probe(ide_drive_t *drive)
2092 {
2093         struct cdrom_info *info;
2094         struct gendisk *g;
2095         struct request_sense sense;
2096
2097         if (!strstr("ide-cdrom", drive->driver_req))
2098                 goto failed;
2099         if (!drive->present)
2100                 goto failed;
2101         if (drive->media != ide_cdrom && drive->media != ide_optical)
2102                 goto failed;
2103         /* skip drives that we were told to ignore */
2104         if (ignore != NULL) {
2105                 if (strstr(ignore, drive->name)) {
2106                         printk(KERN_INFO "ide-cd: ignoring drive %s\n",
2107                                          drive->name);
2108                         goto failed;
2109                 }
2110         }
2111         if (drive->scsi) {
2112                 printk(KERN_INFO "ide-cd: passing drive %s to ide-scsi "
2113                                  "emulation.\n", drive->name);
2114                 goto failed;
2115         }
2116         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2117         if (info == NULL) {
2118                 printk(KERN_ERR "%s: Can't allocate a cdrom structure\n",
2119                                 drive->name);
2120                 goto failed;
2121         }
2122
2123         g = alloc_disk(1 << PARTN_BITS);
2124         if (!g)
2125                 goto out_free_cd;
2126
2127         ide_init_disk(g, drive);
2128
2129         ide_proc_register_driver(drive, &ide_cdrom_driver);
2130
2131         kref_init(&info->kref);
2132
2133         info->drive = drive;
2134         info->driver = &ide_cdrom_driver;
2135         info->disk = g;
2136
2137         g->private_data = &info->driver;
2138
2139         drive->driver_data = info;
2140
2141         g->minors = 1;
2142         g->driverfs_dev = &drive->gendev;
2143         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2144         if (ide_cdrom_setup(drive)) {
2145                 ide_proc_unregister_driver(drive, &ide_cdrom_driver);
2146                 ide_cd_release(&info->kref);
2147                 goto failed;
2148         }
2149
2150         ide_cd_read_toc(drive, &sense);
2151         g->fops = &idecd_ops;
2152         g->flags |= GENHD_FL_REMOVABLE;
2153         add_disk(g);
2154         return 0;
2155
2156 out_free_cd:
2157         kfree(info);
2158 failed:
2159         return -ENODEV;
2160 }
2161
2162 static void __exit ide_cdrom_exit(void)
2163 {
2164         driver_unregister(&ide_cdrom_driver.gen_driver);
2165 }
2166
2167 static int __init ide_cdrom_init(void)
2168 {
2169         return driver_register(&ide_cdrom_driver.gen_driver);
2170 }
2171
2172 MODULE_ALIAS("ide:*m-cdrom*");
2173 MODULE_ALIAS("ide-cd");
2174 module_init(ide_cdrom_init);
2175 module_exit(ide_cdrom_exit);
2176 MODULE_LICENSE("GPL");