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
 140 void cdrom_analyze_sense_data(ide_drive_t *drive,
 141                               struct request *failed_command,
 142                               struct request_sense *sense)
 143 {
 144         unsigned long sector;
 145         unsigned long bio_sectors;
 146         unsigned long valid;
 147         struct cdrom_info *info = drive->driver_data;
 148
 149         if (!cdrom_log_sense(drive, failed_command, sense))
 150                 return;
 151
 152         /*
 153          * If a read toc is executed for a CD-R or CD-RW medium where the first
 154          * toc has not been recorded yet, it will fail with 05/24/00 (which is a
 155          * confusing error)
 156          */
 157         if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
 158                 if (sense->sense_key == 0x05 && sense->asc == 0x24)
 159                         return;
 160
 161         /* current error */
 162         if (sense->error_code == 0x70) {
 163                 switch (sense->sense_key) {
 164                 case MEDIUM_ERROR:
 165                 case VOLUME_OVERFLOW:
 166                 case ILLEGAL_REQUEST:
 167                         if (!sense->valid)
 168                                 break;
 169                         if (failed_command == NULL ||
 170                                         !blk_fs_request(failed_command))
 171                                 break;
 172                         sector = (sense->information[0] << 24) |
 173                                  (sense->information[1] << 16) |
 174                                  (sense->information[2] <<  8) |
 175                                  (sense->information[3]);
 176
 177                         bio_sectors = bio_sectors(failed_command->bio);
 178                         if (bio_sectors < 4)
 179                                 bio_sectors = 4;
 180                         if (drive->queue->hardsect_size == 2048)
 181                                 /* device sector size is 2K */
 182                                 sector <<= 2;
 183                         sector &= ~(bio_sectors - 1);
 184                         valid = (sector - failed_command->sector) << 9;
 185
 186                         if (valid < 0)
 187                                 valid = 0;
 188                         if (sector < get_capacity(info->disk) &&
 189                                 drive->probed_capacity - sector < 4 * 75) {
 190                                 set_capacity(info->disk, sector);
 191                         }
 192                 }
 193         }
 194
 195         ide_cd_log_error(drive->name, failed_command, sense);
 196 }
 197
 198 /* Initialize a ide-cd packet command request */
 199 void ide_cd_init_rq(ide_drive_t *drive, struct request *rq)
 200 {
 201         struct cdrom_info *cd = drive->driver_data;
 202
 203         ide_init_drive_cmd(rq);
 204         rq->cmd_type = REQ_TYPE_ATA_PC;
 205         rq->rq_disk = cd->disk;
 206 }
 207
 208 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
 209                                       struct request *failed_command)
 210 {
 211         struct cdrom_info *info         = drive->driver_data;
 212         struct request *rq              = &info->request_sense_request;
 213
 214         if (sense == NULL)
 215                 sense = &info->sense_data;
 216
 217         /* stuff the sense request in front of our current request */
 218         ide_cd_init_rq(drive, rq);
 219
 220         rq->data = sense;
 221         rq->cmd[0] = GPCMD_REQUEST_SENSE;
 222         rq->cmd[4] = rq->data_len = 18;
 223
 224         rq->cmd_type = REQ_TYPE_SENSE;
 225
 226         /* NOTE! Save the failed command in "rq->buffer" */
 227         rq->buffer = (void *) failed_command;
 228
 229         (void) ide_do_drive_cmd(drive, rq, ide_preempt);
 230 }
 231
 232 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
 233 {
 234         struct request *rq = HWGROUP(drive)->rq;
 235         int nsectors = rq->hard_cur_sectors;
 236
 237         if (blk_sense_request(rq) && uptodate) {
 238                 /*
 239                  * For REQ_TYPE_SENSE, "rq->buffer" points to the original
 240                  * failed request
 241                  */
 242                 struct request *failed = (struct request *) rq->buffer;
 243                 struct cdrom_info *info = drive->driver_data;
 244                 void *sense = &info->sense_data;
 245                 unsigned long flags;
 246
 247                 if (failed) {
 248                         if (failed->sense) {
 249                                 sense = failed->sense;
 250                                 failed->sense_len = rq->sense_len;
 251                         }
 252                         cdrom_analyze_sense_data(drive, failed, sense);
 253                         /*
 254                          * now end the failed request
 255                          */
 256                         if (blk_fs_request(failed)) {
 257                                 if (ide_end_dequeued_request(drive, failed, 0,
 258                                                 failed->hard_nr_sectors))
 259                                         BUG();
 260                         } else {
 261                                 spin_lock_irqsave(&ide_lock, flags);
 262                                 if (__blk_end_request(failed, -EIO,
 263                                                       failed->data_len))
 264                                         BUG();
 265                                 spin_unlock_irqrestore(&ide_lock, flags);
 266                         }
 267                 } else
 268                         cdrom_analyze_sense_data(drive, NULL, sense);
 269         }
 270
 271         if (!rq->current_nr_sectors && blk_fs_request(rq))
 272                 uptodate = 1;
 273         /* make sure it's fully ended */
 274         if (blk_pc_request(rq))
 275                 nsectors = (rq->data_len + 511) >> 9;
 276         if (!nsectors)
 277                 nsectors = 1;
 278
 279         ide_end_request(drive, uptodate, nsectors);
 280 }
 281
 282 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 stat)
 283 {
 284         if (stat & 0x80)
 285                 return;
 286         ide_dump_status(drive, msg, stat);
 287 }
 288
 289 /*
 290  * Returns:
 291  * 0: if the request should be continued.
 292  * 1: if the request was ended.
 293  */
 294 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
 295 {
 296         struct request *rq = HWGROUP(drive)->rq;
 297         int stat, err, sense_key;
 298
 299         /* check for errors */
 300         stat = ide_read_status(drive);
 301
 302         if (stat_ret)
 303                 *stat_ret = stat;
 304
 305         if (OK_STAT(stat, good_stat, BAD_R_STAT))
 306                 return 0;
 307
 308         /* get the IDE error register */
 309         err = ide_read_error(drive);
 310         sense_key = err >> 4;
 311
 312         if (rq == NULL) {
 313                 printk("%s: missing rq in cdrom_decode_status\n", drive->name);
 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("%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 + ATAPI_WAIT_WRITE_BUSY;
 394                                 rq->errors = 1;
 395                                 if (time_after(jiffies, info->write_timeout))
 396                                         do_end_request = 1;
 397                                 else {
 398                                         unsigned long flags;
 399
 400                                         /*
 401                                          * take a breather relying on the unplug
 402                                          * timer to kick us again
 403                                          */
 404                                         spin_lock_irqsave(&ide_lock, flags);
 405                                         blk_plug_device(drive->queue);
 406                                         spin_unlock_irqrestore(&ide_lock, 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, "media error (bad sector)", stat);
 434                         do_end_request = 1;
 435                 } else if (sense_key == BLANK_CHECK) {
 436                         /* disk appears blank ?? */
 437                         ide_dump_status_no_sense(drive, "media error (blank)", stat);
 438                         do_end_request = 1;
 439                 } else if ((err & ~ABRT_ERR) != 0) {
 440                         /* go to the default handler for other errors */
 441                         ide_error(drive, "cdrom_decode_status", stat);
 442                         return 1;
 443                 } else if ((++rq->errors > ERROR_MAX)) {
 444                         /* we've racked up too many retries, abort */
 445                         do_end_request = 1;
 446                 }
 447
 448                 /*
 449                  * End a request through request sense analysis when we have
 450                  * sense data. We need this in order to perform end of media
 451                  * processing.
 452                  */
 453                 if (do_end_request)
 454                         goto end_request;
 455
 456                 /*
 457                  * If we got a CHECK_CONDITION status, queue
 458                  * a request sense command.
 459                  */
 460                 if (stat & ERR_STAT)
 461                         cdrom_queue_request_sense(drive, NULL, NULL);
 462         } else {
 463                 blk_dump_rq_flags(rq, "ide-cd: bad rq");
 464                 cdrom_end_request(drive, 0);
 465         }
 466
 467         /* retry, or handle the next request */
 468         return 1;
 469
 470 end_request:
 471         if (stat & ERR_STAT) {
 472                 unsigned long flags;
 473
 474                 spin_lock_irqsave(&ide_lock, flags);
 475                 blkdev_dequeue_request(rq);
 476                 HWGROUP(drive)->rq = NULL;
 477                 spin_unlock_irqrestore(&ide_lock, flags);
 478
 479                 cdrom_queue_request_sense(drive, rq->sense, rq);
 480         } else
 481                 cdrom_end_request(drive, 0);
 482
 483         return 1;
 484 }
 485
 486 static int cdrom_timer_expiry(ide_drive_t *drive)
 487 {
 488         struct request *rq = HWGROUP(drive)->rq;
 489         unsigned long wait = 0;
 490
 491         /*
 492          * Some commands are *slow* and normally take a long time to complete.
 493          * Usually we can use the ATAPI "disconnect" to bypass this, but not all
 494          * commands/drives support that. Let ide_timer_expiry keep polling us
 495          * for these.
 496          */
 497         switch (rq->cmd[0]) {
 498         case GPCMD_BLANK:
 499         case GPCMD_FORMAT_UNIT:
 500         case GPCMD_RESERVE_RZONE_TRACK:
 501         case GPCMD_CLOSE_TRACK:
 502         case GPCMD_FLUSH_CACHE:
 503                 wait = ATAPI_WAIT_PC;
 504                 break;
 505         default:
 506                 if (!(rq->cmd_flags & REQ_QUIET))
 507                         printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n", rq->cmd[0]);
 508                 wait = 0;
 509                 break;
 510         }
 511         return wait;
 512 }
 513
 514 /*
 515  * Set up the device registers for transferring a packet command on DEV,
 516  * expecting to later transfer XFERLEN bytes.  HANDLER is the routine
 517  * which actually transfers the command to the drive.  If this is a
 518  * drq_interrupt device, this routine will arrange for HANDLER to be
 519  * called when the interrupt from the drive arrives.  Otherwise, HANDLER
 520  * will be called immediately after the drive is prepared for the transfer.
 521  */
 522 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
 523                                                   int xferlen,
 524                                                   ide_handler_t *handler)
 525 {
 526         ide_startstop_t startstop;
 527         struct cdrom_info *info = drive->driver_data;
 528         ide_hwif_t *hwif = drive->hwif;
 529
 530         /* wait for the controller to be idle */
 531         if (ide_wait_stat(&startstop, drive, 0, BUSY_STAT, WAIT_READY))
 532                 return startstop;
 533
 534         /* FIXME: for Virtual DMA we must check harder */
 535         if (info->dma)
 536                 info->dma = !hwif->dma_setup(drive);
 537
 538         /* set up the controller registers */
 539         ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL |
 540                            IDE_TFLAG_NO_SELECT_MASK, xferlen, info->dma);
 541
 542         if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) {
 543                 /* waiting for CDB interrupt, not DMA yet. */
 544                 if (info->dma)
 545                         drive->waiting_for_dma = 0;
 546
 547                 /* packet command */
 548                 ide_execute_command(drive, WIN_PACKETCMD, handler, ATAPI_WAIT_PC, cdrom_timer_expiry);
 549                 return ide_started;
 550         } else {
 551                 unsigned long flags;
 552
 553                 /* packet command */
 554                 spin_lock_irqsave(&ide_lock, flags);
 555                 hwif->OUTBSYNC(drive, WIN_PACKETCMD,
 556                                hwif->io_ports[IDE_COMMAND_OFFSET]);
 557                 ndelay(400);
 558                 spin_unlock_irqrestore(&ide_lock, flags);
 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(drive)->atapi_output_bytes(drive, rq->cmd, cmd_len);
 610
 611         /* start the DMA if need be */
 612         if (info->dma)
 613                 hwif->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, &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->atapi_input_bytes(drive, 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->atapi_output_bytes : hwif->atapi_input_bytes;
 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, cdrom_start_seek_continuation);
 805 }
 806
 807 /*
 808  * Fix up a possibly partially-processed request so that we can start it over
 809  * entirely, or even put it back on the request queue.
 810  */
 811 static void restore_request(struct request *rq)
 812 {
 813         if (rq->buffer != bio_data(rq->bio)) {
 814                 sector_t n = (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->hard_cur_sectors = rq->current_nr_sectors = bio_cur_sectors(rq->bio);
 821         rq->hard_nr_sectors = rq->nr_sectors;
 822         rq->hard_sector = rq->sector;
 823         rq->q->prep_rq_fn(rq->q, rq);
 824 }
 825
 826 /*
 827  * All other packet commands.
 828  */
 829 static void ide_cd_request_sense_fixup(struct request *rq)
 830 {
 831         /*
 832          * Some of the trailing request sense fields are optional,
 833          * and some drives don't send them.  Sigh.
 834          */
 835         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 836             rq->data_len > 0 && rq->data_len <= 5)
 837                 while (rq->data_len > 0) {
 838                         *(u8 *)rq->data++ = 0;
 839                         --rq->data_len;
 840                 }
 841 }
 842
 843 int ide_cd_queue_pc(ide_drive_t *drive, struct request *rq)
 844 {
 845         struct request_sense sense;
 846         int retries = 10;
 847         unsigned int flags = rq->cmd_flags;
 848
 849         if (rq->sense == NULL)
 850                 rq->sense = &sense;
 851
 852         /* start of retry loop */
 853         do {
 854                 int error;
 855                 unsigned long time = jiffies;
 856                 rq->cmd_flags = flags;
 857
 858                 error = ide_do_drive_cmd(drive, rq, ide_wait);
 859                 time = jiffies - time;
 860
 861                 /*
 862                  * FIXME: we should probably abort/retry or something in case of
 863                  * failure.
 864                  */
 865                 if (rq->cmd_flags & REQ_FAILED) {
 866                         /*
 867                          * The request failed.  Retry if it was due to a unit
 868                          * attention status (usually means media was changed).
 869                          */
 870                         struct request_sense *reqbuf = rq->sense;
 871
 872                         if (reqbuf->sense_key == UNIT_ATTENTION)
 873                                 cdrom_saw_media_change(drive);
 874                         else if (reqbuf->sense_key == NOT_READY &&
 875                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 876                                 /*
 877                                  * The drive is in the process of loading
 878                                  * a disk.  Retry, but wait a little to give
 879                                  * the drive time to complete the load.
 880                                  */
 881                                 ssleep(2);
 882                         } else {
 883                                 /* otherwise, don't retry */
 884                                 retries = 0;
 885                         }
 886                         --retries;
 887                 }
 888
 889                 /* end of retry loop */
 890         } while ((rq->cmd_flags & REQ_FAILED) && retries >= 0);
 891
 892         /* return an error if the command failed */
 893         return (rq->cmd_flags & REQ_FAILED) ? -EIO : 0;
 894 }
 895
 896 /*
 897  * Called from blk_end_request_callback() after the data of the request is
 898  * completed and before the request itself is completed. By returning value '1',
 899  * blk_end_request_callback() returns immediately without completing it.
 900  */
 901 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
 902 {
 903         return 1;
 904 }
 905
 906 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 907 {
 908         ide_hwif_t *hwif = drive->hwif;
 909         struct cdrom_info *info = drive->driver_data;
 910         struct request *rq = HWGROUP(drive)->rq;
 911         xfer_func_t *xferfunc;
 912         ide_expiry_t *expiry = NULL;
 913         int dma_error = 0, dma, stat, ireason, len, thislen, uptodate = 0;
 914         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
 915         unsigned int timeout;
 916         u8 lowcyl, highcyl;
 917
 918         /* check for errors */
 919         dma = info->dma;
 920         if (dma) {
 921                 info->dma = 0;
 922                 dma_error = HWIF(drive)->ide_dma_end(drive);
 923                 if (dma_error) {
 924                         printk(KERN_ERR "%s: DMA %s error\n", drive->name,
 925                                         write ? "write" : "read");
 926                         ide_dma_off(drive);
 927                 }
 928         }
 929
 930         if (cdrom_decode_status(drive, 0, &stat))
 931                 return ide_stopped;
 932
 933         /* using dma, transfer is complete now */
 934         if (dma) {
 935                 if (dma_error)
 936                         return ide_error(drive, "dma error", stat);
 937                 if (blk_fs_request(rq)) {
 938                         ide_end_request(drive, 1, rq->nr_sectors);
 939                         return ide_stopped;
 940                 }
 941                 goto end_request;
 942         }
 943
 944         /* ok we fall to pio :/ */
 945         ireason = hwif->INB(hwif->io_ports[IDE_IREASON_OFFSET]) & 0x3;
 946         lowcyl  = hwif->INB(hwif->io_ports[IDE_BCOUNTL_OFFSET]);
 947         highcyl = hwif->INB(hwif->io_ports[IDE_BCOUNTH_OFFSET]);
 948
 949         len = lowcyl + (256 * highcyl);
 950
 951         thislen = blk_fs_request(rq) ? len : rq->data_len;
 952         if (thislen > len)
 953                 thislen = len;
 954
 955         /* If DRQ is clear, the command has completed. */
 956         if ((stat & DRQ_STAT) == 0) {
 957                 if (blk_fs_request(rq)) {
 958                         /*
 959                          * If we're not done reading/writing, complain.
 960                          * Otherwise, complete the command normally.
 961                          */
 962                         uptodate = 1;
 963                         if (rq->current_nr_sectors > 0) {
 964                                 printk(KERN_ERR "%s: %s: data underrun "
 965                                                 "(%d blocks)\n",
 966                                                 drive->name, __func__,
 967                                                 rq->current_nr_sectors);
 968                                 if (!write)
 969                                         rq->cmd_flags |= REQ_FAILED;
 970                                 uptodate = 0;
 971                         }
 972                         cdrom_end_request(drive, uptodate);
 973                         return ide_stopped;
 974                 } else if (!blk_pc_request(rq)) {
 975                         ide_cd_request_sense_fixup(rq);
 976                         /* complain if we still have data left to transfer */
 977                         uptodate = rq->data_len ? 0 : 1;
 978                 }
 979                 goto end_request;
 980         }
 981
 982         /* check which way to transfer data */
 983         if (ide_cd_check_ireason(drive, rq, len, ireason, write))
 984                 return ide_stopped;
 985
 986         if (blk_fs_request(rq)) {
 987                 if (write == 0) {
 988                         int nskip;
 989
 990                         if (ide_cd_check_transfer_size(drive, len)) {
 991                                 cdrom_end_request(drive, 0);
 992                                 return ide_stopped;
 993                         }
 994
 995                         /*
 996                          * First, figure out if we need to bit-bucket
 997                          * any of the leading sectors.
 998                          */
 999                         nskip = min_t(int, rq->current_nr_sectors
1000                                            - bio_cur_sectors(rq->bio),
1001                                            thislen >> 9);
1002                         if (nskip > 0) {
1003                                 ide_cd_drain_data(drive, nskip);
1004                                 rq->current_nr_sectors -= nskip;
1005                                 thislen -= (nskip << 9);
1006                         }
1007                 }
1008         }
1009
1010         if (ireason == 0) {
1011                 write = 1;
1012                 xferfunc = HWIF(drive)->atapi_output_bytes;
1013         } else {
1014                 write = 0;
1015                 xferfunc = HWIF(drive)->atapi_input_bytes;
1016         }
1017
1018         /* transfer data */
1019         while (thislen > 0) {
1020                 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
1021                 int blen = rq->data_len;
1022
1023                 /* bio backed? */
1024                 if (rq->bio) {
1025                         if (blk_fs_request(rq)) {
1026                                 ptr = rq->buffer;
1027                                 blen = rq->current_nr_sectors << 9;
1028                         } else {
1029                                 ptr = bio_data(rq->bio);
1030                                 blen = bio_iovec(rq->bio)->bv_len;
1031                         }
1032                 }
1033
1034                 if (!ptr) {
1035                         if (blk_fs_request(rq) && !write)
1036                                 /*
1037                                  * If the buffers are full, pipe the rest into
1038                                  * oblivion.
1039                                  */
1040                                 ide_cd_drain_data(drive, thislen >> 9);
1041                         else {
1042                                 printk(KERN_ERR "%s: confused, missing data\n",
1043                                                 drive->name);
1044                                 blk_dump_rq_flags(rq, rq_data_dir(rq)
1045                                                   ? "cdrom_newpc_intr, write"
1046                                                   : "cdrom_newpc_intr, read");
1047                         }
1048                         break;
1049                 }
1050
1051                 if (blen > thislen)
1052                         blen = thislen;
1053
1054                 xferfunc(drive, ptr, blen);
1055
1056                 thislen -= blen;
1057                 len -= blen;
1058
1059                 if (blk_fs_request(rq)) {
1060                         rq->buffer += blen;
1061                         rq->nr_sectors -= (blen >> 9);
1062                         rq->current_nr_sectors -= (blen >> 9);
1063                         rq->sector += (blen >> 9);
1064
1065                         if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1066                                 cdrom_end_request(drive, 1);
1067                 } else {
1068                         rq->data_len -= blen;
1069
1070                         /*
1071                          * The request can't be completed until DRQ is cleared.
1072                          * So complete the data, but don't complete the request
1073                          * using the dummy function for the callback feature
1074                          * of blk_end_request_callback().
1075                          */
1076                         if (rq->bio)
1077                                 blk_end_request_callback(rq, 0, blen,
1078                                                  cdrom_newpc_intr_dummy_cb);
1079                         else
1080                                 rq->data += blen;
1081                 }
1082                 if (!write && blk_sense_request(rq))
1083                         rq->sense_len += blen;
1084         }
1085
1086         /* pad, if necessary */
1087         if (!blk_fs_request(rq) && len > 0)
1088                 ide_cd_pad_transfer(drive, xferfunc, len);
1089
1090         if (blk_pc_request(rq)) {
1091                 timeout = rq->timeout;
1092         } else {
1093                 timeout = ATAPI_WAIT_PC;
1094                 if (!blk_fs_request(rq))
1095                         expiry = cdrom_timer_expiry;
1096         }
1097
1098         ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1099         return ide_started;
1100
1101 end_request:
1102         if (blk_pc_request(rq)) {
1103                 unsigned long flags;
1104                 unsigned int dlen = rq->data_len;
1105
1106                 if (dma)
1107                         rq->data_len = 0;
1108
1109                 spin_lock_irqsave(&ide_lock, flags);
1110                 if (__blk_end_request(rq, 0, dlen))
1111                         BUG();
1112                 HWGROUP(drive)->rq = NULL;
1113                 spin_unlock_irqrestore(&ide_lock, flags);
1114         } else {
1115                 if (!uptodate)
1116                         rq->cmd_flags |= REQ_FAILED;
1117                 cdrom_end_request(drive, uptodate);
1118         }
1119         return ide_stopped;
1120 }
1121
1122 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1123 {
1124         struct cdrom_info *cd = drive->driver_data;
1125         int write = rq_data_dir(rq) == WRITE;
1126         unsigned short sectors_per_frame =
1127                 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1128
1129         if (write) {
1130                 /* disk has become write protected */
1131                 if (cd->disk->policy) {
1132                         cdrom_end_request(drive, 0);
1133                         return ide_stopped;
1134                 }
1135         } else {
1136                 /*
1137                  * We may be retrying this request after an error.  Fix up any
1138                  * weirdness which might be present in the request packet.
1139                  */
1140                 restore_request(rq);
1141         }
1142
1143         /* use DMA, if possible / writes *must* be hardware frame aligned */
1144         if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1145             (rq->sector & (sectors_per_frame - 1))) {
1146                 if (write) {
1147                         cdrom_end_request(drive, 0);
1148                         return ide_stopped;
1149                 }
1150                 cd->dma = 0;
1151         } else
1152                 cd->dma = drive->using_dma;
1153
1154         if (write)
1155                 cd->devinfo.media_written = 1;
1156
1157         /* start sending the read/write request to the drive */
1158         return cdrom_start_packet_command(drive, 32768, cdrom_start_rw_cont);
1159 }
1160
1161 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1162 {
1163         struct request *rq = HWGROUP(drive)->rq;
1164
1165         if (!rq->timeout)
1166                 rq->timeout = ATAPI_WAIT_PC;
1167
1168         return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1169 }
1170
1171 static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1172 {
1173         struct cdrom_info *info = drive->driver_data;
1174
1175         if (blk_pc_request(rq))
1176                 rq->cmd_flags |= REQ_QUIET;
1177         else
1178                 rq->cmd_flags &= ~REQ_FAILED;
1179
1180         info->dma = 0;
1181
1182         /* sg request */
1183         if (rq->bio) {
1184                 int mask = drive->queue->dma_alignment;
1185                 unsigned long addr = (unsigned long) page_address(bio_page(rq->bio));
1186
1187                 info->dma = drive->using_dma;
1188
1189                 /*
1190                  * check if dma is safe
1191                  *
1192                  * NOTE! The "len" and "addr" checks should possibly have
1193                  * separate masks.
1194                  */
1195                 if ((rq->data_len & 15) || (addr & mask))
1196                         info->dma = 0;
1197         }
1198
1199         /* start sending the command to the drive */
1200         return cdrom_start_packet_command(drive, rq->data_len, cdrom_do_newpc_cont);
1201 }
1202
1203 /*
1204  * cdrom driver request routine.
1205  */
1206 static ide_startstop_t
1207 ide_do_rw_cdrom(ide_drive_t *drive, struct request *rq, sector_t block)
1208 {
1209         ide_startstop_t action;
1210         struct cdrom_info *info = drive->driver_data;
1211
1212         if (blk_fs_request(rq)) {
1213                 if (info->cd_flags & IDE_CD_FLAG_SEEKING) {
1214                         unsigned long elapsed = jiffies - info->start_seek;
1215                         int stat = ide_read_status(drive);
1216
1217                         if ((stat & SEEK_STAT) != SEEK_STAT) {
1218                                 if (elapsed < IDECD_SEEK_TIMEOUT) {
1219                                         ide_stall_queue(drive, IDECD_SEEK_TIMER);
1220                                         return ide_stopped;
1221                                 }
1222                                 printk(KERN_ERR "%s: DSC timeout\n", drive->name);
1223                         }
1224                         info->cd_flags &= ~IDE_CD_FLAG_SEEKING;
1225                 }
1226                 if ((rq_data_dir(rq) == READ) && IDE_LARGE_SEEK(info->last_block, block, IDECD_SEEK_THRESHOLD) && drive->dsc_overlap)
1227                         action = cdrom_start_seek(drive, block);
1228                 else
1229                         action = cdrom_start_rw(drive, rq);
1230                 info->last_block = block;
1231                 return action;
1232         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1233                    rq->cmd_type == REQ_TYPE_ATA_PC) {
1234                 return cdrom_do_block_pc(drive, rq);
1235         } else if (blk_special_request(rq)) {
1236                 /* right now this can only be a reset... */
1237                 cdrom_end_request(drive, 1);
1238                 return ide_stopped;
1239         }
1240
1241         blk_dump_rq_flags(rq, "ide-cd bad flags");
1242         cdrom_end_request(drive, 0);
1243         return ide_stopped;
1244 }
1245
1246
1247
1248 /*
1249  * Ioctl handling.
1250  *
1251  * Routines which queue packet commands take as a final argument a pointer to a
1252  * request_sense struct. If execution of the command results in an error with a
1253  * CHECK CONDITION status, this structure will be filled with the results of the
1254  * subsequent request sense command. The pointer can also be NULL, in which case
1255  * no sense information is returned.
1256  */
1257 static
1258 void msf_from_bcd(struct atapi_msf *msf)
1259 {
1260         msf->minute = BCD2BIN(msf->minute);
1261         msf->second = BCD2BIN(msf->second);
1262         msf->frame  = BCD2BIN(msf->frame);
1263 }
1264
1265 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1266 {
1267         struct request req;
1268         struct cdrom_info *info = drive->driver_data;
1269         struct cdrom_device_info *cdi = &info->devinfo;
1270
1271         ide_cd_init_rq(drive, &req);
1272
1273         req.sense = sense;
1274         req.cmd[0] = GPCMD_TEST_UNIT_READY;
1275         req.cmd_flags |= REQ_QUIET;
1276
1277         /*
1278          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1279          * instead of supporting the LOAD_UNLOAD opcode.
1280          */
1281         req.cmd[7] = cdi->sanyo_slot % 3;
1282
1283         return ide_cd_queue_pc(drive, &req);
1284 }
1285
1286 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1287                                unsigned long *sectors_per_frame,
1288                                struct request_sense *sense)
1289 {
1290         struct {
1291                 __u32 lba;
1292                 __u32 blocklen;
1293         } capbuf;
1294
1295         int stat;
1296         struct request req;
1297
1298         ide_cd_init_rq(drive, &req);
1299
1300         req.sense = sense;
1301         req.cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1302         req.data = (char *)&capbuf;
1303         req.data_len = sizeof(capbuf);
1304         req.cmd_flags |= REQ_QUIET;
1305
1306         stat = ide_cd_queue_pc(drive, &req);
1307         if (stat == 0) {
1308                 *capacity = 1 + be32_to_cpu(capbuf.lba);
1309                 *sectors_per_frame =
1310                         be32_to_cpu(capbuf.blocklen) >> SECTOR_BITS;
1311         }
1312
1313         return stat;
1314 }
1315
1316 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1317                                 int format, char *buf, int buflen,
1318                                 struct request_sense *sense)
1319 {
1320         struct request req;
1321
1322         ide_cd_init_rq(drive, &req);
1323
1324         req.sense = sense;
1325         req.data =  buf;
1326         req.data_len = buflen;
1327         req.cmd_flags |= REQ_QUIET;
1328         req.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1329         req.cmd[6] = trackno;
1330         req.cmd[7] = (buflen >> 8);
1331         req.cmd[8] = (buflen & 0xff);
1332         req.cmd[9] = (format << 6);
1333
1334         if (msf_flag)
1335                 req.cmd[1] = 2;
1336
1337         return ide_cd_queue_pc(drive, &req);
1338 }
1339
1340 /* Try to read the entire TOC for the disk into our internal buffer. */
1341 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1342 {
1343         int stat, ntracks, i;
1344         struct cdrom_info *info = drive->driver_data;
1345         struct cdrom_device_info *cdi = &info->devinfo;
1346         struct atapi_toc *toc = info->toc;
1347         struct {
1348                 struct atapi_toc_header hdr;
1349                 struct atapi_toc_entry  ent;
1350         } ms_tmp;
1351         long last_written;
1352         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1353
1354         if (toc == NULL) {
1355                 /* try to allocate space */
1356                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1357                 if (toc == NULL) {
1358                         printk(KERN_ERR "%s: No cdrom TOC buffer!\n", drive->name);
1359                         return -ENOMEM;
1360                 }
1361                 info->toc = toc;
1362         }
1363
1364         /*
1365          * Check to see if the existing data is still valid. If it is,
1366          * just return.
1367          */
1368         (void) cdrom_check_status(drive, sense);
1369
1370         if (info->cd_flags & IDE_CD_FLAG_TOC_VALID)
1371                 return 0;
1372
1373         /* try to get the total cdrom capacity and sector size */
1374         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1375                                    sense);
1376         if (stat)
1377                 toc->capacity = 0x1fffff;
1378
1379         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1380         /* save a private copy of the TOC capacity for error handling */
1381         drive->probed_capacity = toc->capacity * sectors_per_frame;
1382
1383         blk_queue_hardsect_size(drive->queue,
1384                                 sectors_per_frame << SECTOR_BITS);
1385
1386         /* first read just the header, so we know how long the TOC is */
1387         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1388                                     sizeof(struct atapi_toc_header), sense);
1389         if (stat)
1390                 return stat;
1391
1392         if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1393                 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1394                 toc->hdr.last_track  = BCD2BIN(toc->hdr.last_track);
1395         }
1396
1397         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1398         if (ntracks <= 0)
1399                 return -EIO;
1400         if (ntracks > MAX_TRACKS)
1401                 ntracks = MAX_TRACKS;
1402
1403         /* now read the whole schmeer */
1404         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1405                                   (char *)&toc->hdr,
1406                                    sizeof(struct atapi_toc_header) +
1407                                    (ntracks + 1) *
1408                                    sizeof(struct atapi_toc_entry), sense);
1409
1410         if (stat && toc->hdr.first_track > 1) {
1411                 /*
1412                  * Cds with CDI tracks only don't have any TOC entries, despite
1413                  * of this the returned values are
1414                  * first_track == last_track = number of CDI tracks + 1,
1415                  * so that this case is indistinguishable from the same layout
1416                  * plus an additional audio track. If we get an error for the
1417                  * regular case, we assume a CDI without additional audio
1418                  * tracks. In this case the readable TOC is empty (CDI tracks
1419                  * are not included) and only holds the Leadout entry.
1420                  *
1421                  * Heiko Eißfeldt.
1422                  */
1423                 ntracks = 0;
1424                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1425                                            (char *)&toc->hdr,
1426                                            sizeof(struct atapi_toc_header) +
1427                                            (ntracks + 1) *
1428                                            sizeof(struct atapi_toc_entry),
1429                                            sense);
1430                 if (stat)
1431                         return stat;
1432
1433                 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1434                         toc->hdr.first_track = (u8)BIN2BCD(CDROM_LEADOUT);
1435                         toc->hdr.last_track = (u8)BIN2BCD(CDROM_LEADOUT);
1436                 } else {
1437                         toc->hdr.first_track = CDROM_LEADOUT;
1438                         toc->hdr.last_track = CDROM_LEADOUT;
1439                 }
1440         }
1441
1442         if (stat)
1443                 return stat;
1444
1445         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1446
1447         if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1448                 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1449                 toc->hdr.last_track  = BCD2BIN(toc->hdr.last_track);
1450         }
1451
1452         for (i = 0; i <= ntracks; i++) {
1453                 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1454                         if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD)
1455                                 toc->ent[i].track = BCD2BIN(toc->ent[i].track);
1456                         msf_from_bcd(&toc->ent[i].addr.msf);
1457                 }
1458                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1459                                                   toc->ent[i].addr.msf.second,
1460                                                   toc->ent[i].addr.msf.frame);
1461         }
1462
1463         if (toc->hdr.first_track != CDROM_LEADOUT) {
1464                 /* read the multisession information */
1465                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1466                                            sizeof(ms_tmp), sense);
1467                 if (stat)
1468                         return stat;
1469
1470                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1471         } else {
1472                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track = CDROM_LEADOUT;
1473                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1474         }
1475
1476         if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1477                 /* re-read multisession information using MSF format */
1478                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1479                                            sizeof(ms_tmp), sense);
1480                 if (stat)
1481                         return stat;
1482
1483                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1484                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1485                                                    ms_tmp.ent.addr.msf.second,
1486                                                    ms_tmp.ent.addr.msf.frame);
1487         }
1488
1489         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1490
1491         /* now try to get the total cdrom capacity */
1492         stat = cdrom_get_last_written(cdi, &last_written);
1493         if (!stat && (last_written > toc->capacity)) {
1494                 toc->capacity = last_written;
1495                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1496                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1497         }
1498
1499         /* Remember that we've read this stuff. */
1500         info->cd_flags |= IDE_CD_FLAG_TOC_VALID;
1501
1502         return 0;
1503 }
1504
1505 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1506 {
1507         struct cdrom_info *info = drive->driver_data;
1508         struct cdrom_device_info *cdi = &info->devinfo;
1509         struct packet_command cgc;
1510         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1511
1512         if ((info->cd_flags & IDE_CD_FLAG_FULL_CAPS_PAGE) == 0)
1513                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1514
1515         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1516         do {
1517                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1518                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1519                 if (!stat)
1520                         break;
1521         } while (--attempts);
1522         return stat;
1523 }
1524
1525 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1526 {
1527         struct cdrom_info *cd = drive->driver_data;
1528         u16 curspeed, maxspeed;
1529
1530         curspeed = *(u16 *)&buf[8 + 14];
1531         maxspeed = *(u16 *)&buf[8 +  8];
1532
1533         if (cd->cd_flags & IDE_CD_FLAG_LE_SPEED_FIELDS) {
1534                 curspeed = le16_to_cpu(curspeed);
1535                 maxspeed = le16_to_cpu(maxspeed);
1536         } else {
1537                 curspeed = be16_to_cpu(curspeed);
1538                 maxspeed = be16_to_cpu(maxspeed);
1539         }
1540
1541         cd->current_speed = (curspeed + (176/2)) / 176;
1542         cd->max_speed = (maxspeed + (176/2)) / 176;
1543 }
1544
1545 #define IDE_CD_CAPABILITIES \
1546         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1547          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1548          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1549          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1550          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1551
1552 static struct cdrom_device_ops ide_cdrom_dops = {
1553         .open                   = ide_cdrom_open_real,
1554         .release                = ide_cdrom_release_real,
1555         .drive_status           = ide_cdrom_drive_status,
1556         .media_changed          = ide_cdrom_check_media_change_real,
1557         .tray_move              = ide_cdrom_tray_move,
1558         .lock_door              = ide_cdrom_lock_door,
1559         .select_speed           = ide_cdrom_select_speed,
1560         .get_last_session       = ide_cdrom_get_last_session,
1561         .get_mcn                = ide_cdrom_get_mcn,
1562         .reset                  = ide_cdrom_reset,
1563         .audio_ioctl            = ide_cdrom_audio_ioctl,
1564         .capability             = IDE_CD_CAPABILITIES,
1565         .generic_packet         = ide_cdrom_packet,
1566 };
1567
1568 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1569 {
1570         struct cdrom_info *info = drive->driver_data;
1571         struct cdrom_device_info *devinfo = &info->devinfo;
1572
1573         devinfo->ops = &ide_cdrom_dops;
1574         devinfo->speed = info->current_speed;
1575         devinfo->capacity = nslots;
1576         devinfo->handle = drive;
1577         strcpy(devinfo->name, drive->name);
1578
1579         if (info->cd_flags & IDE_CD_FLAG_NO_SPEED_SELECT)
1580                 devinfo->mask |= CDC_SELECT_SPEED;
1581
1582         devinfo->disk = info->disk;
1583         return register_cdrom(devinfo);
1584 }
1585
1586 static
1587 int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1588 {
1589         struct cdrom_info *cd = drive->driver_data;
1590         struct cdrom_device_info *cdi = &cd->devinfo;
1591         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1592         mechtype_t mechtype;
1593         int nslots = 1;
1594
1595         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1596                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1597                      CDC_MO_DRIVE | CDC_RAM);
1598
1599         if (drive->media == ide_optical) {
1600                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1601                 printk(KERN_ERR "%s: ATAPI magneto-optical drive\n", drive->name);
1602                 return nslots;
1603         }
1604
1605         if (cd->cd_flags & IDE_CD_FLAG_PRE_ATAPI12) {
1606                 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
1607                 cdi->mask &= ~CDC_PLAY_AUDIO;
1608                 return nslots;
1609         }
1610
1611         /*
1612          * We have to cheat a little here. the packet will eventually be queued
1613          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1614          * Since this device hasn't been registered with the Uniform layer yet,
1615          * it can't do this. Same goes for cdi->ops.
1616          */
1617         cdi->handle = drive;
1618         cdi->ops = &ide_cdrom_dops;
1619
1620         if (ide_cdrom_get_capabilities(drive, buf))
1621                 return 0;
1622
1623         if ((buf[8 + 6] & 0x01) == 0)
1624                 cd->cd_flags |= IDE_CD_FLAG_NO_DOORLOCK;
1625         if (buf[8 + 6] & 0x08)
1626                 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
1627         if (buf[8 + 3] & 0x01)
1628                 cdi->mask &= ~CDC_CD_R;
1629         if (buf[8 + 3] & 0x02)
1630                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1631         if (buf[8 + 2] & 0x38)
1632                 cdi->mask &= ~CDC_DVD;
1633         if (buf[8 + 3] & 0x20)
1634                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1635         if (buf[8 + 3] & 0x10)
1636                 cdi->mask &= ~CDC_DVD_R;
1637         if ((buf[8 + 4] & 0x01) || (cd->cd_flags & IDE_CD_FLAG_PLAY_AUDIO_OK))
1638                 cdi->mask &= ~CDC_PLAY_AUDIO;
1639
1640         mechtype = buf[8 + 6] >> 5;
1641         if (mechtype == mechtype_caddy || mechtype == mechtype_popup)
1642                 cdi->mask |= CDC_CLOSE_TRAY;
1643
1644         if (cdi->sanyo_slot > 0) {
1645                 cdi->mask &= ~CDC_SELECT_DISC;
1646                 nslots = 3;
1647         } else if (mechtype == mechtype_individual_changer ||
1648                    mechtype == mechtype_cartridge_changer) {
1649                 nslots = cdrom_number_of_slots(cdi);
1650                 if (nslots > 1)
1651                         cdi->mask &= ~CDC_SELECT_DISC;
1652         }
1653
1654         ide_cdrom_update_speed(drive, buf);
1655
1656         printk(KERN_INFO "%s: ATAPI", drive->name);
1657
1658         /* don't print speed if the drive reported 0 */
1659         if (cd->max_speed)
1660                 printk(KERN_CONT " %dX", cd->max_speed);
1661
1662         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1663
1664         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1665                 printk(KERN_CONT " DVD%s%s",
1666                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1667                                  (cdi->mask & CDC_DVD_RAM) ? "" : "-RAM");
1668
1669         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1670                 printk(KERN_CONT " CD%s%s",
1671                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1672                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1673
1674         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1675                 printk(KERN_CONT " changer w/%d slots", nslots);
1676         else
1677                 printk(KERN_CONT " drive");
1678
1679         printk(KERN_CONT ", %dkB Cache\n", be16_to_cpu(*(u16 *)&buf[8 + 12]));
1680
1681         return nslots;
1682 }
1683
1684 /* standard prep_rq_fn that builds 10 byte cmds */
1685 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1686 {
1687         int hard_sect = queue_hardsect_size(q);
1688         long block = (long)rq->hard_sector / (hard_sect >> 9);
1689         unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1690
1691         memset(rq->cmd, 0, sizeof(rq->cmd));
1692
1693         if (rq_data_dir(rq) == READ)
1694                 rq->cmd[0] = GPCMD_READ_10;
1695         else
1696                 rq->cmd[0] = GPCMD_WRITE_10;
1697
1698         /*
1699          * fill in lba
1700          */
1701         rq->cmd[2] = (block >> 24) & 0xff;
1702         rq->cmd[3] = (block >> 16) & 0xff;
1703         rq->cmd[4] = (block >>  8) & 0xff;
1704         rq->cmd[5] = block & 0xff;
1705
1706         /*
1707          * and transfer length
1708          */
1709         rq->cmd[7] = (blocks >> 8) & 0xff;
1710         rq->cmd[8] = blocks & 0xff;
1711         rq->cmd_len = 10;
1712         return BLKPREP_OK;
1713 }
1714
1715 /*
1716  * Most of the SCSI commands are supported directly by ATAPI devices.
1717  * This transform handles the few exceptions.
1718  */
1719 static int ide_cdrom_prep_pc(struct request *rq)
1720 {
1721         u8 *c = rq->cmd;
1722
1723         /* transform 6-byte read/write commands to the 10-byte version */
1724         if (c[0] == READ_6 || c[0] == WRITE_6) {
1725                 c[8] = c[4];
1726                 c[5] = c[3];
1727                 c[4] = c[2];
1728                 c[3] = c[1] & 0x1f;
1729                 c[2] = 0;
1730                 c[1] &= 0xe0;
1731                 c[0] += (READ_10 - READ_6);
1732                 rq->cmd_len = 10;
1733                 return BLKPREP_OK;
1734         }
1735
1736         /*
1737          * it's silly to pretend we understand 6-byte sense commands, just
1738          * reject with ILLEGAL_REQUEST and the caller should take the
1739          * appropriate action
1740          */
1741         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1742                 rq->errors = ILLEGAL_REQUEST;
1743                 return BLKPREP_KILL;
1744         }
1745
1746         return BLKPREP_OK;
1747 }
1748
1749 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1750 {
1751         if (blk_fs_request(rq))
1752                 return ide_cdrom_prep_fs(q, rq);
1753         else if (blk_pc_request(rq))
1754                 return ide_cdrom_prep_pc(rq);
1755
1756         return 0;
1757 }
1758
1759 struct cd_list_entry {
1760         const char      *id_model;
1761         const char      *id_firmware;
1762         unsigned int    cd_flags;
1763 };
1764
1765 #ifdef CONFIG_IDE_PROC_FS
1766 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1767 {
1768         unsigned long capacity, sectors_per_frame;
1769
1770         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1771                 return 0;
1772
1773         return capacity * sectors_per_frame;
1774 }
1775
1776 static int proc_idecd_read_capacity
1777         (char *page, char **start, off_t off, int count, int *eof, void *data)
1778 {
1779         ide_drive_t *drive = data;
1780         int len;
1781
1782         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1783         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1784 }
1785
1786 static ide_proc_entry_t idecd_proc[] = {
1787         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1788         { NULL, 0, NULL, NULL }
1789 };
1790
1791 static void ide_cdrom_add_settings(ide_drive_t *drive)
1792 {
1793         ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1,
1794                         &drive->dsc_overlap, NULL);
1795 }
1796 #else
1797 static inline void ide_cdrom_add_settings(ide_drive_t *drive) { ; }
1798 #endif
1799
1800 static const struct cd_list_entry ide_cd_quirks_list[] = {
1801         /* Limit transfer size per interrupt. */
1802         { "SAMSUNG CD-ROM SCR-2430", NULL,   IDE_CD_FLAG_LIMIT_NFRAMES      },
1803         { "SAMSUNG CD-ROM SCR-2432", NULL,   IDE_CD_FLAG_LIMIT_NFRAMES      },
1804         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1805         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_CD_FLAG_NO_SPEED_SELECT    },
1806         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1807         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_CD_FLAG_TOCADDR_AS_BCD |
1808                                              IDE_CD_FLAG_PRE_ATAPI12,       },
1809         /* Vertos 300, some versions of this drive like to talk BCD. */
1810         { "V003S0DS",                NULL,   IDE_CD_FLAG_VERTOS_300_SSD,    },
1811         /* Vertos 600 ESD. */
1812         { "V006E0DS",                NULL,   IDE_CD_FLAG_VERTOS_600_ESD,    },
1813         /*
1814          * Sanyo 3 CD changer uses a non-standard command for CD changing
1815          * (by default standard ATAPI support for CD changers is used).
1816          */
1817         { "CD-ROM CDR-C3 G",         NULL,   IDE_CD_FLAG_SANYO_3CD          },
1818         { "CD-ROM CDR-C3G",          NULL,   IDE_CD_FLAG_SANYO_3CD          },
1819         { "CD-ROM CDR_C36",          NULL,   IDE_CD_FLAG_SANYO_3CD          },
1820         /* Stingray 8X CD-ROM. */
1821         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_CD_FLAG_PRE_ATAPI12},
1822         /*
1823          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1824          * mode sense page capabilities size, but older drives break.
1825          */
1826         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_CD_FLAG_FULL_CAPS_PAGE  },
1827         { "WPI CDS-32X",                NULL,   IDE_CD_FLAG_FULL_CAPS_PAGE  },
1828         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1829         { "",                        "241N", IDE_CD_FLAG_LE_SPEED_FIELDS    },
1830         /*
1831          * Some drives used by Apple don't advertise audio play
1832          * but they do support reading TOC & audio datas.
1833          */
1834         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1835         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1836         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1837         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1838         { "Optiarc DVD RW AD-5200A", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1839         { NULL, NULL, 0 }
1840 };
1841
1842 static unsigned int ide_cd_flags(struct hd_driveid *id)
1843 {
1844         const struct cd_list_entry *cle = ide_cd_quirks_list;
1845
1846         while (cle->id_model) {
1847                 if (strcmp(cle->id_model, id->model) == 0 &&
1848                     (cle->id_firmware == NULL ||
1849                      strstr(id->fw_rev, cle->id_firmware)))
1850                         return cle->cd_flags;
1851                 cle++;
1852         }
1853
1854         return 0;
1855 }
1856
1857 static
1858 int ide_cdrom_setup(ide_drive_t *drive)
1859 {
1860         struct cdrom_info *cd = drive->driver_data;
1861         struct cdrom_device_info *cdi = &cd->devinfo;
1862         struct hd_driveid *id = drive->id;
1863         int nslots;
1864
1865         blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1866         blk_queue_dma_alignment(drive->queue, 31);
1867         drive->queue->unplug_delay = (1 * HZ) / 1000;
1868         if (!drive->queue->unplug_delay)
1869                 drive->queue->unplug_delay = 1;
1870
1871         drive->special.all      = 0;
1872
1873         cd->cd_flags = IDE_CD_FLAG_MEDIA_CHANGED | IDE_CD_FLAG_NO_EJECT |
1874                        ide_cd_flags(id);
1875
1876         if ((id->config & 0x0060) == 0x20)
1877                 cd->cd_flags |= IDE_CD_FLAG_DRQ_INTERRUPT;
1878
1879         if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_300_SSD) &&
1880             id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1881                 cd->cd_flags |= (IDE_CD_FLAG_TOCTRACKS_AS_BCD |
1882                                  IDE_CD_FLAG_TOCADDR_AS_BCD);
1883         else if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_600_ESD) &&
1884                  id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1885                 cd->cd_flags |= IDE_CD_FLAG_TOCTRACKS_AS_BCD;
1886         else if (cd->cd_flags & IDE_CD_FLAG_SANYO_3CD)
1887                 /* 3 => use CD in slot 0 */
1888                 cdi->sanyo_slot = 3;
1889
1890         nslots = ide_cdrom_probe_capabilities(drive);
1891
1892         /* set correct block size */
1893         blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1894
1895         if (drive->autotune == IDE_TUNE_DEFAULT ||
1896             drive->autotune == IDE_TUNE_AUTO)
1897                 drive->dsc_overlap = (drive->next != drive);
1898
1899         if (ide_cdrom_register(drive, nslots)) {
1900                 printk(KERN_ERR "%s: ide_cdrom_setup failed to register device with the cdrom driver.\n", drive->name);
1901                 cd->devinfo.handle = NULL;
1902                 return 1;
1903         }
1904         ide_cdrom_add_settings(drive);
1905         return 0;
1906 }
1907
1908 static void ide_cd_remove(ide_drive_t *drive)
1909 {
1910         struct cdrom_info *info = drive->driver_data;
1911
1912         ide_proc_unregister_driver(drive, info->driver);
1913
1914         del_gendisk(info->disk);
1915
1916         ide_cd_put(info);
1917 }
1918
1919 static void ide_cd_release(struct kref *kref)
1920 {
1921         struct cdrom_info *info = to_ide_cd(kref);
1922         struct cdrom_device_info *devinfo = &info->devinfo;
1923         ide_drive_t *drive = info->drive;
1924         struct gendisk *g = info->disk;
1925
1926         kfree(info->toc);
1927         if (devinfo->handle == drive)
1928                 unregister_cdrom(devinfo);
1929         drive->dsc_overlap = 0;
1930         drive->driver_data = NULL;
1931         blk_queue_prep_rq(drive->queue, NULL);
1932         g->private_data = NULL;
1933         put_disk(g);
1934         kfree(info);
1935 }
1936
1937 static int ide_cd_probe(ide_drive_t *);
1938
1939 static ide_driver_t ide_cdrom_driver = {
1940         .gen_driver = {
1941                 .owner          = THIS_MODULE,
1942                 .name           = "ide-cdrom",
1943                 .bus            = &ide_bus_type,
1944         },
1945         .probe                  = ide_cd_probe,
1946         .remove                 = ide_cd_remove,
1947         .version                = IDECD_VERSION,
1948         .media                  = ide_cdrom,
1949         .supports_dsc_overlap   = 1,
1950         .do_request             = ide_do_rw_cdrom,
1951         .end_request            = ide_end_request,
1952         .error                  = __ide_error,
1953         .abort                  = __ide_abort,
1954 #ifdef CONFIG_IDE_PROC_FS
1955         .proc                   = idecd_proc,
1956 #endif
1957 };
1958
1959 static int idecd_open(struct inode *inode, struct file *file)
1960 {
1961         struct gendisk *disk = inode->i_bdev->bd_disk;
1962         struct cdrom_info *info;
1963         int rc = -ENOMEM;
1964
1965         info = ide_cd_get(disk);
1966         if (!info)
1967                 return -ENXIO;
1968
1969         rc = cdrom_open(&info->devinfo, inode, file);
1970
1971         if (rc < 0)
1972                 ide_cd_put(info);
1973
1974         return rc;
1975 }
1976
1977 static int idecd_release(struct inode *inode, struct file *file)
1978 {
1979         struct gendisk *disk = inode->i_bdev->bd_disk;
1980         struct cdrom_info *info = ide_cd_g(disk);
1981
1982         cdrom_release(&info->devinfo, file);
1983
1984         ide_cd_put(info);
1985
1986         return 0;
1987 }
1988
1989 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1990 {
1991         struct packet_command cgc;
1992         char buffer[16];
1993         int stat;
1994         char spindown;
1995
1996         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1997                 return -EFAULT;
1998
1999         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2000
2001         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2002         if (stat)
2003                 return stat;
2004
2005         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
2006         return cdrom_mode_select(cdi, &cgc);
2007 }
2008
2009 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2010 {
2011         struct packet_command cgc;
2012         char buffer[16];
2013         int stat;
2014         char spindown;
2015
2016         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2017
2018         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2019         if (stat)
2020                 return stat;
2021
2022         spindown = buffer[11] & 0x0f;
2023         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
2024                 return -EFAULT;
2025         return 0;
2026 }
2027
2028 static int idecd_ioctl(struct inode *inode, struct file *file,
2029                         unsigned int cmd, unsigned long arg)
2030 {
2031         struct block_device *bdev = inode->i_bdev;
2032         struct cdrom_info *info = ide_cd_g(bdev->bd_disk);
2033         int err;
2034
2035         switch (cmd) {
2036         case CDROMSETSPINDOWN:
2037                 return idecd_set_spindown(&info->devinfo, arg);
2038         case CDROMGETSPINDOWN:
2039                 return idecd_get_spindown(&info->devinfo, arg);
2040         default:
2041                 break;
2042         }
2043
2044         err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg);
2045         if (err == -EINVAL)
2046                 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg);
2047
2048         return err;
2049 }
2050
2051 static int idecd_media_changed(struct gendisk *disk)
2052 {
2053         struct cdrom_info *info = ide_cd_g(disk);
2054         return cdrom_media_changed(&info->devinfo);
2055 }
2056
2057 static int idecd_revalidate_disk(struct gendisk *disk)
2058 {
2059         struct cdrom_info *info = ide_cd_g(disk);
2060         struct request_sense sense;
2061
2062         ide_cd_read_toc(info->drive, &sense);
2063
2064         return  0;
2065 }
2066
2067 static struct block_device_operations idecd_ops = {
2068         .owner                  = THIS_MODULE,
2069         .open                   = idecd_open,
2070         .release                = idecd_release,
2071         .ioctl                  = idecd_ioctl,
2072         .media_changed          = idecd_media_changed,
2073         .revalidate_disk        = idecd_revalidate_disk
2074 };
2075
2076 /* module options */
2077 static char *ignore;
2078
2079 module_param(ignore, charp, 0400);
2080 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2081
2082 static int ide_cd_probe(ide_drive_t *drive)
2083 {
2084         struct cdrom_info *info;
2085         struct gendisk *g;
2086         struct request_sense sense;
2087
2088         if (!strstr("ide-cdrom", drive->driver_req))
2089                 goto failed;
2090         if (!drive->present)
2091                 goto failed;
2092         if (drive->media != ide_cdrom && drive->media != ide_optical)
2093                 goto failed;
2094         /* skip drives that we were told to ignore */
2095         if (ignore != NULL) {
2096                 if (strstr(ignore, drive->name)) {
2097                         printk(KERN_INFO "ide-cd: ignoring drive %s\n", drive->name);
2098                         goto failed;
2099                 }
2100         }
2101         if (drive->scsi) {
2102                 printk(KERN_INFO "ide-cd: passing drive %s to ide-scsi emulation.\n", drive->name);
2103                 goto failed;
2104         }
2105         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2106         if (info == NULL) {
2107                 printk(KERN_ERR "%s: Can't allocate a cdrom structure\n", drive->name);
2108                 goto failed;
2109         }
2110
2111         g = alloc_disk(1 << PARTN_BITS);
2112         if (!g)
2113                 goto out_free_cd;
2114
2115         ide_init_disk(g, drive);
2116
2117         ide_proc_register_driver(drive, &ide_cdrom_driver);
2118
2119         kref_init(&info->kref);
2120
2121         info->drive = drive;
2122         info->driver = &ide_cdrom_driver;
2123         info->disk = g;
2124
2125         g->private_data = &info->driver;
2126
2127         drive->driver_data = info;
2128
2129         g->minors = 1;
2130         g->driverfs_dev = &drive->gendev;
2131         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2132         if (ide_cdrom_setup(drive)) {
2133                 ide_proc_unregister_driver(drive, &ide_cdrom_driver);
2134                 ide_cd_release(&info->kref);
2135                 goto failed;
2136         }
2137
2138         ide_cd_read_toc(drive, &sense);
2139         g->fops = &idecd_ops;
2140         g->flags |= GENHD_FL_REMOVABLE;
2141         add_disk(g);
2142         return 0;
2143
2144 out_free_cd:
2145         kfree(info);
2146 failed:
2147         return -ENODEV;
2148 }
2149
2150 static void __exit ide_cdrom_exit(void)
2151 {
2152         driver_unregister(&ide_cdrom_driver.gen_driver);
2153 }
2154
2155 static int __init ide_cdrom_init(void)
2156 {
2157         return driver_register(&ide_cdrom_driver.gen_driver);
2158 }
2159
2160 MODULE_ALIAS("ide:*m-cdrom*");
2161 MODULE_ALIAS("ide-cd");
2162 module_init(ide_cdrom_init);
2163 module_exit(ide_cdrom_exit);
2164 MODULE_LICENSE("GPL");