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 static void ide_cd_release(struct kref *);
  56
  57 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
  58 {
  59         struct cdrom_info *cd = NULL;
  60
  61         mutex_lock(&idecd_ref_mutex);
  62         cd = ide_drv_g(disk, cdrom_info);
  63         if (cd) {
  64                 if (ide_device_get(cd->drive))
  65                         cd = NULL;
  66                 else
  67                         kref_get(&cd->kref);
  68
  69         }
  70         mutex_unlock(&idecd_ref_mutex);
  71         return cd;
  72 }
  73
  74 static void ide_cd_put(struct cdrom_info *cd)
  75 {
  76         ide_drive_t *drive = cd->drive;
  77
  78         mutex_lock(&idecd_ref_mutex);
  79         kref_put(&cd->kref, ide_cd_release);
  80         ide_device_put(drive);
  81         mutex_unlock(&idecd_ref_mutex);
  82 }
  83
  84 /*
  85  * Generic packet command support and error handling routines.
  86  */
  87
  88 /* Mark that we've seen a media change and invalidate our internal buffers. */
  89 static void cdrom_saw_media_change(ide_drive_t *drive)
  90 {
  91         drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
  92         drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
  93 }
  94
  95 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
  96                            struct request_sense *sense)
  97 {
  98         int log = 0;
  99
 100         if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
 101                 return 0;
 102
 103         switch (sense->sense_key) {
 104         case NO_SENSE:
 105         case RECOVERED_ERROR:
 106                 break;
 107         case NOT_READY:
 108                 /*
 109                  * don't care about tray state messages for e.g. capacity
 110                  * commands or in-progress or becoming ready
 111                  */
 112                 if (sense->asc == 0x3a || sense->asc == 0x04)
 113                         break;
 114                 log = 1;
 115                 break;
 116         case ILLEGAL_REQUEST:
 117                 /*
 118                  * don't log START_STOP unit with LoEj set, since we cannot
 119                  * reliably check if drive can auto-close
 120                  */
 121                 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
 122                         break;
 123                 log = 1;
 124                 break;
 125         case UNIT_ATTENTION:
 126                 /*
 127                  * Make good and sure we've seen this potential media change.
 128                  * Some drives (i.e. Creative) fail to present the correct sense
 129                  * key in the error register.
 130                  */
 131                 cdrom_saw_media_change(drive);
 132                 break;
 133         default:
 134                 log = 1;
 135                 break;
 136         }
 137         return log;
 138 }
 139
 140 static 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         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                         if (drive->queue->hardsect_size == 2048)
 177                                 /* device sector size is 2K */
 178                                 sector <<= 2;
 179
 180                         bio_sectors = max(bio_sectors(failed_command->bio), 4U);
 181                         sector &= ~(bio_sectors - 1);
 182
 183                         if (sector < get_capacity(info->disk) &&
 184                             drive->probed_capacity - sector < 4 * 75)
 185                                 set_capacity(info->disk, sector);
 186                 }
 187         }
 188
 189         ide_cd_log_error(drive->name, failed_command, sense);
 190 }
 191
 192 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
 193                                       struct request *failed_command)
 194 {
 195         struct cdrom_info *info         = drive->driver_data;
 196         struct request *rq              = &info->request_sense_request;
 197
 198         if (sense == NULL)
 199                 sense = &info->sense_data;
 200
 201         /* stuff the sense request in front of our current request */
 202         blk_rq_init(NULL, rq);
 203         rq->cmd_type = REQ_TYPE_ATA_PC;
 204         rq->rq_disk = info->disk;
 205
 206         rq->data = sense;
 207         rq->cmd[0] = GPCMD_REQUEST_SENSE;
 208         rq->cmd[4] = 18;
 209         rq->data_len = 18;
 210
 211         rq->cmd_type = REQ_TYPE_SENSE;
 212         rq->cmd_flags |= REQ_PREEMPT;
 213
 214         /* NOTE! Save the failed command in "rq->buffer" */
 215         rq->buffer = (void *) failed_command;
 216
 217         ide_do_drive_cmd(drive, rq);
 218 }
 219
 220 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
 221 {
 222         struct request *rq = HWGROUP(drive)->rq;
 223         int nsectors = rq->hard_cur_sectors;
 224
 225         if (blk_sense_request(rq) && uptodate) {
 226                 /*
 227                  * For REQ_TYPE_SENSE, "rq->buffer" points to the original
 228                  * failed request
 229                  */
 230                 struct request *failed = (struct request *) rq->buffer;
 231                 struct cdrom_info *info = drive->driver_data;
 232                 void *sense = &info->sense_data;
 233                 unsigned long flags;
 234
 235                 if (failed) {
 236                         if (failed->sense) {
 237                                 sense = failed->sense;
 238                                 failed->sense_len = rq->sense_len;
 239                         }
 240                         cdrom_analyze_sense_data(drive, failed, sense);
 241                         /*
 242                          * now end the failed request
 243                          */
 244                         if (blk_fs_request(failed)) {
 245                                 if (ide_end_dequeued_request(drive, failed, 0,
 246                                                 failed->hard_nr_sectors))
 247                                         BUG();
 248                         } else {
 249                                 spin_lock_irqsave(&ide_lock, flags);
 250                                 if (__blk_end_request(failed, -EIO,
 251                                                       failed->data_len))
 252                                         BUG();
 253                                 spin_unlock_irqrestore(&ide_lock, flags);
 254                         }
 255                 } else
 256                         cdrom_analyze_sense_data(drive, NULL, sense);
 257         }
 258
 259         if (!rq->current_nr_sectors && blk_fs_request(rq))
 260                 uptodate = 1;
 261         /* make sure it's fully ended */
 262         if (blk_pc_request(rq))
 263                 nsectors = (rq->data_len + 511) >> 9;
 264         if (!nsectors)
 265                 nsectors = 1;
 266
 267         ide_end_request(drive, uptodate, nsectors);
 268 }
 269
 270 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
 271 {
 272         if (st & 0x80)
 273                 return;
 274         ide_dump_status(drive, msg, st);
 275 }
 276
 277 /*
 278  * Returns:
 279  * 0: if the request should be continued.
 280  * 1: if the request was ended.
 281  */
 282 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
 283 {
 284         ide_hwif_t *hwif = drive->hwif;
 285         struct request *rq = hwif->hwgroup->rq;
 286         int stat, err, sense_key;
 287
 288         /* check for errors */
 289         stat = hwif->tp_ops->read_status(hwif);
 290
 291         if (stat_ret)
 292                 *stat_ret = stat;
 293
 294         if (OK_STAT(stat, good_stat, BAD_R_STAT))
 295                 return 0;
 296
 297         /* get the IDE error register */
 298         err = ide_read_error(drive);
 299         sense_key = err >> 4;
 300
 301         if (rq == NULL) {
 302                 printk(KERN_ERR "%s: missing rq in %s\n",
 303                                 drive->name, __func__);
 304                 return 1;
 305         }
 306
 307         if (blk_sense_request(rq)) {
 308                 /*
 309                  * We got an error trying to get sense info from the drive
 310                  * (probably while trying to recover from a former error).
 311                  * Just give up.
 312                  */
 313                 rq->cmd_flags |= REQ_FAILED;
 314                 cdrom_end_request(drive, 0);
 315                 ide_error(drive, "request sense failure", stat);
 316                 return 1;
 317
 318         } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
 319                 /* All other functions, except for READ. */
 320
 321                 /*
 322                  * if we have an error, pass back CHECK_CONDITION as the
 323                  * scsi status byte
 324                  */
 325                 if (blk_pc_request(rq) && !rq->errors)
 326                         rq->errors = SAM_STAT_CHECK_CONDITION;
 327
 328                 /* check for tray open */
 329                 if (sense_key == NOT_READY) {
 330                         cdrom_saw_media_change(drive);
 331                 } else if (sense_key == UNIT_ATTENTION) {
 332                         /* check for media change */
 333                         cdrom_saw_media_change(drive);
 334                         return 0;
 335                 } else if (sense_key == ILLEGAL_REQUEST &&
 336                            rq->cmd[0] == GPCMD_START_STOP_UNIT) {
 337                         /*
 338                          * Don't print error message for this condition--
 339                          * SFF8090i indicates that 5/24/00 is the correct
 340                          * response to a request to close the tray if the
 341                          * drive doesn't have that capability.
 342                          * cdrom_log_sense() knows this!
 343                          */
 344                 } else if (!(rq->cmd_flags & REQ_QUIET)) {
 345                         /* otherwise, print an error */
 346                         ide_dump_status(drive, "packet command error", stat);
 347                 }
 348
 349                 rq->cmd_flags |= REQ_FAILED;
 350
 351                 /*
 352                  * instead of playing games with moving completions around,
 353                  * remove failed request completely and end it when the
 354                  * request sense has completed
 355                  */
 356                 goto end_request;
 357
 358         } else if (blk_fs_request(rq)) {
 359                 int do_end_request = 0;
 360
 361                 /* handle errors from READ and WRITE requests */
 362
 363                 if (blk_noretry_request(rq))
 364                         do_end_request = 1;
 365
 366                 if (sense_key == NOT_READY) {
 367                         /* tray open */
 368                         if (rq_data_dir(rq) == READ) {
 369                                 cdrom_saw_media_change(drive);
 370
 371                                 /* fail the request */
 372                                 printk(KERN_ERR "%s: tray open\n", drive->name);
 373                                 do_end_request = 1;
 374                         } else {
 375                                 struct cdrom_info *info = drive->driver_data;
 376
 377                                 /*
 378                                  * Allow the drive 5 seconds to recover, some
 379                                  * devices will return this error while flushing
 380                                  * data from cache.
 381                                  */
 382                                 if (!rq->errors)
 383                                         info->write_timeout = jiffies +
 384                                                         ATAPI_WAIT_WRITE_BUSY;
 385                                 rq->errors = 1;
 386                                 if (time_after(jiffies, info->write_timeout))
 387                                         do_end_request = 1;
 388                                 else {
 389                                         unsigned long flags;
 390
 391                                         /*
 392                                          * take a breather relying on the unplug
 393                                          * timer to kick us again
 394                                          */
 395                                         spin_lock_irqsave(&ide_lock, flags);
 396                                         blk_plug_device(drive->queue);
 397                                         spin_unlock_irqrestore(&ide_lock,
 398                                                                 flags);
 399                                         return 1;
 400                                 }
 401                         }
 402                 } else if (sense_key == UNIT_ATTENTION) {
 403                         /* media change */
 404                         cdrom_saw_media_change(drive);
 405
 406                         /*
 407                          * Arrange to retry the request but be sure to give up
 408                          * if we've retried too many times.
 409                          */
 410                         if (++rq->errors > ERROR_MAX)
 411                                 do_end_request = 1;
 412                 } else if (sense_key == ILLEGAL_REQUEST ||
 413                            sense_key == DATA_PROTECT) {
 414                         /*
 415                          * No point in retrying after an illegal request or data
 416                          * protect error.
 417                          */
 418                         ide_dump_status_no_sense(drive, "command error", stat);
 419                         do_end_request = 1;
 420                 } else if (sense_key == MEDIUM_ERROR) {
 421                         /*
 422                          * No point in re-trying a zillion times on a bad
 423                          * sector. If we got here the error is not correctable.
 424                          */
 425                         ide_dump_status_no_sense(drive,
 426                                                  "media error (bad sector)",
 427                                                  stat);
 428                         do_end_request = 1;
 429                 } else if (sense_key == BLANK_CHECK) {
 430                         /* disk appears blank ?? */
 431                         ide_dump_status_no_sense(drive, "media error (blank)",
 432                                                  stat);
 433                         do_end_request = 1;
 434                 } else if ((err & ~ATA_ABORTED) != 0) {
 435                         /* go to the default handler for other errors */
 436                         ide_error(drive, "cdrom_decode_status", stat);
 437                         return 1;
 438                 } else if ((++rq->errors > ERROR_MAX)) {
 439                         /* we've racked up too many retries, abort */
 440                         do_end_request = 1;
 441                 }
 442
 443                 /*
 444                  * End a request through request sense analysis when we have
 445                  * sense data. We need this in order to perform end of media
 446                  * processing.
 447                  */
 448                 if (do_end_request)
 449                         goto end_request;
 450
 451                 /*
 452                  * If we got a CHECK_CONDITION status, queue
 453                  * a request sense command.
 454                  */
 455                 if (stat & ATA_ERR)
 456                         cdrom_queue_request_sense(drive, NULL, NULL);
 457         } else {
 458                 blk_dump_rq_flags(rq, "ide-cd: bad rq");
 459                 cdrom_end_request(drive, 0);
 460         }
 461
 462         /* retry, or handle the next request */
 463         return 1;
 464
 465 end_request:
 466         if (stat & ATA_ERR) {
 467                 unsigned long flags;
 468
 469                 spin_lock_irqsave(&ide_lock, flags);
 470                 blkdev_dequeue_request(rq);
 471                 HWGROUP(drive)->rq = NULL;
 472                 spin_unlock_irqrestore(&ide_lock, flags);
 473
 474                 cdrom_queue_request_sense(drive, rq->sense, rq);
 475         } else
 476                 cdrom_end_request(drive, 0);
 477
 478         return 1;
 479 }
 480
 481 static int cdrom_timer_expiry(ide_drive_t *drive)
 482 {
 483         struct request *rq = HWGROUP(drive)->rq;
 484         unsigned long wait = 0;
 485
 486         /*
 487          * Some commands are *slow* and normally take a long time to complete.
 488          * Usually we can use the ATAPI "disconnect" to bypass this, but not all
 489          * commands/drives support that. Let ide_timer_expiry keep polling us
 490          * for these.
 491          */
 492         switch (rq->cmd[0]) {
 493         case GPCMD_BLANK:
 494         case GPCMD_FORMAT_UNIT:
 495         case GPCMD_RESERVE_RZONE_TRACK:
 496         case GPCMD_CLOSE_TRACK:
 497         case GPCMD_FLUSH_CACHE:
 498                 wait = ATAPI_WAIT_PC;
 499                 break;
 500         default:
 501                 if (!(rq->cmd_flags & REQ_QUIET))
 502                         printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n",
 503                                          rq->cmd[0]);
 504                 wait = 0;
 505                 break;
 506         }
 507         return wait;
 508 }
 509
 510 /*
 511  * Set up the device registers for transferring a packet command on DEV,
 512  * expecting to later transfer XFERLEN bytes.  HANDLER is the routine
 513  * which actually transfers the command to the drive.  If this is a
 514  * drq_interrupt device, this routine will arrange for HANDLER to be
 515  * called when the interrupt from the drive arrives.  Otherwise, HANDLER
 516  * will be called immediately after the drive is prepared for the transfer.
 517  */
 518 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
 519                                                   int xferlen,
 520                                                   ide_handler_t *handler)
 521 {
 522         struct cdrom_info *info = drive->driver_data;
 523         ide_hwif_t *hwif = drive->hwif;
 524
 525         /* FIXME: for Virtual DMA we must check harder */
 526         if (info->dma)
 527                 info->dma = !hwif->dma_ops->dma_setup(drive);
 528
 529         /* set up the controller registers */
 530         ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL,
 531                            xferlen, info->dma);
 532
 533         if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
 534                 /* waiting for CDB interrupt, not DMA yet. */
 535                 if (info->dma)
 536                         drive->waiting_for_dma = 0;
 537
 538                 /* packet command */
 539                 ide_execute_command(drive, ATA_CMD_PACKET, handler,
 540                                     ATAPI_WAIT_PC, cdrom_timer_expiry);
 541                 return ide_started;
 542         } else {
 543                 ide_execute_pkt_cmd(drive);
 544
 545                 return (*handler) (drive);
 546         }
 547 }
 548
 549 /*
 550  * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
 551  * registers must have already been prepared by cdrom_start_packet_command.
 552  * HANDLER is the interrupt handler to call when the command completes or
 553  * there's data ready.
 554  */
 555 #define ATAPI_MIN_CDB_BYTES 12
 556 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive,
 557                                           struct request *rq,
 558                                           ide_handler_t *handler)
 559 {
 560         ide_hwif_t *hwif = drive->hwif;
 561         int cmd_len;
 562         struct cdrom_info *info = drive->driver_data;
 563         ide_startstop_t startstop;
 564
 565         if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
 566                 /*
 567                  * Here we should have been called after receiving an interrupt
 568                  * from the device.  DRQ should how be set.
 569                  */
 570
 571                 /* check for errors */
 572                 if (cdrom_decode_status(drive, ATA_DRQ, NULL))
 573                         return ide_stopped;
 574
 575                 /* ok, next interrupt will be DMA interrupt */
 576                 if (info->dma)
 577                         drive->waiting_for_dma = 1;
 578         } else {
 579                 /* otherwise, we must wait for DRQ to get set */
 580                 if (ide_wait_stat(&startstop, drive, ATA_DRQ,
 581                                   ATA_BUSY, WAIT_READY))
 582                         return startstop;
 583         }
 584
 585         /* arm the interrupt handler */
 586         ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry);
 587
 588         /* ATAPI commands get padded out to 12 bytes minimum */
 589         cmd_len = COMMAND_SIZE(rq->cmd[0]);
 590         if (cmd_len < ATAPI_MIN_CDB_BYTES)
 591                 cmd_len = ATAPI_MIN_CDB_BYTES;
 592
 593         /* send the command to the device */
 594         hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
 595
 596         /* start the DMA if need be */
 597         if (info->dma)
 598                 hwif->dma_ops->dma_start(drive);
 599
 600         return ide_started;
 601 }
 602
 603 /*
 604  * Check the contents of the interrupt reason register from the cdrom
 605  * and attempt to recover if there are problems.  Returns  0 if everything's
 606  * ok; nonzero if the request has been terminated.
 607  */
 608 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
 609                                 int len, int ireason, int rw)
 610 {
 611         ide_hwif_t *hwif = drive->hwif;
 612
 613         /*
 614          * ireason == 0: the drive wants to receive data from us
 615          * ireason == 2: the drive is expecting to transfer data to us
 616          */
 617         if (ireason == (!rw << 1))
 618                 return 0;
 619         else if (ireason == (rw << 1)) {
 620
 621                 /* whoops... */
 622                 printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
 623                                 drive->name, __func__);
 624
 625                 ide_pad_transfer(drive, rw, len);
 626         } else  if (rw == 0 && ireason == 1) {
 627                 /*
 628                  * Some drives (ASUS) seem to tell us that status info is
 629                  * available.  Just get it and ignore.
 630                  */
 631                 (void)hwif->tp_ops->read_status(hwif);
 632                 return 0;
 633         } else {
 634                 /* drive wants a command packet, or invalid ireason... */
 635                 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n",
 636                                 drive->name, __func__, ireason);
 637         }
 638
 639         if (rq->cmd_type == REQ_TYPE_ATA_PC)
 640                 rq->cmd_flags |= REQ_FAILED;
 641
 642         cdrom_end_request(drive, 0);
 643         return -1;
 644 }
 645
 646 /*
 647  * Assume that the drive will always provide data in multiples of at least
 648  * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
 649  */
 650 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
 651 {
 652         if ((len % SECTOR_SIZE) == 0)
 653                 return 0;
 654
 655         printk(KERN_ERR "%s: %s: Bad transfer size %d\n",
 656                         drive->name, __func__, len);
 657
 658         if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
 659                 printk(KERN_ERR "  This drive is not supported by "
 660                                 "this version of the driver\n");
 661         else {
 662                 printk(KERN_ERR "  Trying to limit transfer sizes\n");
 663                 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
 664         }
 665
 666         return 1;
 667 }
 668
 669 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
 670
 671 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
 672                                                  struct request *rq)
 673 {
 674         if (rq_data_dir(rq) == READ) {
 675                 unsigned short sectors_per_frame =
 676                         queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 677                 int nskip = rq->sector & (sectors_per_frame - 1);
 678
 679                 /*
 680                  * If the requested sector doesn't start on a frame boundary,
 681                  * we must adjust the start of the transfer so that it does,
 682                  * and remember to skip the first few sectors.
 683                  *
 684                  * If the rq->current_nr_sectors field is larger than the size
 685                  * of the buffer, it will mean that we're to skip a number of
 686                  * sectors equal to the amount by which rq->current_nr_sectors
 687                  * is larger than the buffer size.
 688                  */
 689                 if (nskip > 0) {
 690                         /* sanity check... */
 691                         if (rq->current_nr_sectors !=
 692                             bio_cur_sectors(rq->bio)) {
 693                                 printk(KERN_ERR "%s: %s: buffer botch (%u)\n",
 694                                                 drive->name, __func__,
 695                                                 rq->current_nr_sectors);
 696                                 cdrom_end_request(drive, 0);
 697                                 return ide_stopped;
 698                         }
 699                         rq->current_nr_sectors += nskip;
 700                 }
 701         }
 702 #if 0
 703         else
 704                 /* the immediate bit */
 705                 rq->cmd[1] = 1 << 3;
 706 #endif
 707         /* set up the command */
 708         rq->timeout = ATAPI_WAIT_PC;
 709
 710         return ide_started;
 711 }
 712
 713 /*
 714  * Routine to send a read/write packet command to the drive. This is usually
 715  * called directly from cdrom_start_{read,write}(). However, for drq_interrupt
 716  * devices, it is called from an interrupt when the drive is ready to accept
 717  * the command.
 718  */
 719 static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive)
 720 {
 721         struct request *rq = drive->hwif->hwgroup->rq;
 722
 723         /* send the command to the drive and return */
 724         return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
 725 }
 726
 727 #define IDECD_SEEK_THRESHOLD    (1000)                  /* 1000 blocks */
 728 #define IDECD_SEEK_TIMER        (5 * WAIT_MIN_SLEEP)    /* 100 ms */
 729 #define IDECD_SEEK_TIMEOUT      (2 * WAIT_CMD)          /* 20 sec */
 730
 731 static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive)
 732 {
 733         struct cdrom_info *info = drive->driver_data;
 734         int stat;
 735         static int retry = 10;
 736
 737         if (cdrom_decode_status(drive, 0, &stat))
 738                 return ide_stopped;
 739
 740         drive->atapi_flags |= IDE_AFLAG_SEEKING;
 741
 742         if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) {
 743                 if (--retry == 0)
 744                         drive->dsc_overlap = 0;
 745         }
 746         return ide_stopped;
 747 }
 748
 749 static void ide_cd_prepare_seek_request(ide_drive_t *drive, struct request *rq)
 750 {
 751         sector_t frame = rq->sector;
 752
 753         sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS);
 754
 755         memset(rq->cmd, 0, BLK_MAX_CDB);
 756         rq->cmd[0] = GPCMD_SEEK;
 757         put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]);
 758
 759         rq->timeout = ATAPI_WAIT_PC;
 760 }
 761
 762 static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive)
 763 {
 764         struct request *rq = drive->hwif->hwgroup->rq;
 765
 766         return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
 767 }
 768
 769 /*
 770  * Fix up a possibly partially-processed request so that we can start it over
 771  * entirely, or even put it back on the request queue.
 772  */
 773 static void restore_request(struct request *rq)
 774 {
 775         if (rq->buffer != bio_data(rq->bio)) {
 776                 sector_t n =
 777                         (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
 778
 779                 rq->buffer = bio_data(rq->bio);
 780                 rq->nr_sectors += n;
 781                 rq->sector -= n;
 782         }
 783         rq->current_nr_sectors = bio_cur_sectors(rq->bio);
 784         rq->hard_cur_sectors = rq->current_nr_sectors;
 785         rq->hard_nr_sectors = rq->nr_sectors;
 786         rq->hard_sector = rq->sector;
 787         rq->q->prep_rq_fn(rq->q, rq);
 788 }
 789
 790 /*
 791  * All other packet commands.
 792  */
 793 static void ide_cd_request_sense_fixup(struct request *rq)
 794 {
 795         /*
 796          * Some of the trailing request sense fields are optional,
 797          * and some drives don't send them.  Sigh.
 798          */
 799         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 800             rq->data_len > 0 && rq->data_len <= 5)
 801                 while (rq->data_len > 0) {
 802                         *(u8 *)rq->data++ = 0;
 803                         --rq->data_len;
 804                 }
 805 }
 806
 807 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 808                     int write, void *buffer, unsigned *bufflen,
 809                     struct request_sense *sense, int timeout,
 810                     unsigned int cmd_flags)
 811 {
 812         struct cdrom_info *info = drive->driver_data;
 813         struct request_sense local_sense;
 814         int retries = 10;
 815         unsigned int flags = 0;
 816
 817         if (!sense)
 818                 sense = &local_sense;
 819
 820         /* start of retry loop */
 821         do {
 822                 struct request *rq;
 823                 int error;
 824
 825                 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
 826
 827                 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
 828                 rq->cmd_type = REQ_TYPE_ATA_PC;
 829                 rq->sense = sense;
 830                 rq->cmd_flags |= cmd_flags;
 831                 rq->timeout = timeout;
 832                 if (buffer) {
 833                         rq->data = buffer;
 834                         rq->data_len = *bufflen;
 835                 }
 836
 837                 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 838
 839                 if (buffer)
 840                         *bufflen = rq->data_len;
 841
 842                 flags = rq->cmd_flags;
 843                 blk_put_request(rq);
 844
 845                 /*
 846                  * FIXME: we should probably abort/retry or something in case of
 847                  * failure.
 848                  */
 849                 if (flags & REQ_FAILED) {
 850                         /*
 851                          * The request failed.  Retry if it was due to a unit
 852                          * attention status (usually means media was changed).
 853                          */
 854                         struct request_sense *reqbuf = sense;
 855
 856                         if (reqbuf->sense_key == UNIT_ATTENTION)
 857                                 cdrom_saw_media_change(drive);
 858                         else if (reqbuf->sense_key == NOT_READY &&
 859                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 860                                 /*
 861                                  * The drive is in the process of loading
 862                                  * a disk.  Retry, but wait a little to give
 863                                  * the drive time to complete the load.
 864                                  */
 865                                 ssleep(2);
 866                         } else {
 867                                 /* otherwise, don't retry */
 868                                 retries = 0;
 869                         }
 870                         --retries;
 871                 }
 872
 873                 /* end of retry loop */
 874         } while ((flags & REQ_FAILED) && retries >= 0);
 875
 876         /* return an error if the command failed */
 877         return (flags & REQ_FAILED) ? -EIO : 0;
 878 }
 879
 880 /*
 881  * Called from blk_end_request_callback() after the data of the request is
 882  * completed and before the request itself is completed. By returning value '1',
 883  * blk_end_request_callback() returns immediately without completing it.
 884  */
 885 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
 886 {
 887         return 1;
 888 }
 889
 890 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 891 {
 892         ide_hwif_t *hwif = drive->hwif;
 893         struct cdrom_info *info = drive->driver_data;
 894         struct request *rq = HWGROUP(drive)->rq;
 895         xfer_func_t *xferfunc;
 896         ide_expiry_t *expiry = NULL;
 897         int dma_error = 0, dma, stat, thislen, uptodate = 0;
 898         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
 899         unsigned int timeout;
 900         u16 len;
 901         u8 ireason;
 902
 903         /* check for errors */
 904         dma = info->dma;
 905         if (dma) {
 906                 info->dma = 0;
 907                 dma_error = hwif->dma_ops->dma_end(drive);
 908                 if (dma_error) {
 909                         printk(KERN_ERR "%s: DMA %s error\n", drive->name,
 910                                         write ? "write" : "read");
 911                         ide_dma_off(drive);
 912                 }
 913         }
 914
 915         if (cdrom_decode_status(drive, 0, &stat))
 916                 return ide_stopped;
 917
 918         /* using dma, transfer is complete now */
 919         if (dma) {
 920                 if (dma_error)
 921                         return ide_error(drive, "dma error", stat);
 922                 if (blk_fs_request(rq)) {
 923                         ide_end_request(drive, 1, rq->nr_sectors);
 924                         return ide_stopped;
 925                 }
 926                 goto end_request;
 927         }
 928
 929         ide_read_bcount_and_ireason(drive, &len, &ireason);
 930
 931         thislen = blk_fs_request(rq) ? len : rq->data_len;
 932         if (thislen > len)
 933                 thislen = len;
 934
 935         /* If DRQ is clear, the command has completed. */
 936         if ((stat & ATA_DRQ) == 0) {
 937                 if (blk_fs_request(rq)) {
 938                         /*
 939                          * If we're not done reading/writing, complain.
 940                          * Otherwise, complete the command normally.
 941                          */
 942                         uptodate = 1;
 943                         if (rq->current_nr_sectors > 0) {
 944                                 printk(KERN_ERR "%s: %s: data underrun "
 945                                                 "(%d blocks)\n",
 946                                                 drive->name, __func__,
 947                                                 rq->current_nr_sectors);
 948                                 if (!write)
 949                                         rq->cmd_flags |= REQ_FAILED;
 950                                 uptodate = 0;
 951                         }
 952                         cdrom_end_request(drive, uptodate);
 953                         return ide_stopped;
 954                 } else if (!blk_pc_request(rq)) {
 955                         ide_cd_request_sense_fixup(rq);
 956                         /* complain if we still have data left to transfer */
 957                         uptodate = rq->data_len ? 0 : 1;
 958                 }
 959                 goto end_request;
 960         }
 961
 962         /* check which way to transfer data */
 963         if (ide_cd_check_ireason(drive, rq, len, ireason, write))
 964                 return ide_stopped;
 965
 966         if (blk_fs_request(rq)) {
 967                 if (write == 0) {
 968                         int nskip;
 969
 970                         if (ide_cd_check_transfer_size(drive, len)) {
 971                                 cdrom_end_request(drive, 0);
 972                                 return ide_stopped;
 973                         }
 974
 975                         /*
 976                          * First, figure out if we need to bit-bucket
 977                          * any of the leading sectors.
 978                          */
 979                         nskip = min_t(int, rq->current_nr_sectors
 980                                            - bio_cur_sectors(rq->bio),
 981                                            thislen >> 9);
 982                         if (nskip > 0) {
 983                                 ide_pad_transfer(drive, write, nskip << 9);
 984                                 rq->current_nr_sectors -= nskip;
 985                                 thislen -= (nskip << 9);
 986                         }
 987                 }
 988         }
 989
 990         if (ireason == 0) {
 991                 write = 1;
 992                 xferfunc = hwif->tp_ops->output_data;
 993         } else {
 994                 write = 0;
 995                 xferfunc = hwif->tp_ops->input_data;
 996         }
 997
 998         /* transfer data */
 999         while (thislen > 0) {
1000                 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
1001                 int blen = rq->data_len;
1002
1003                 /* bio backed? */
1004                 if (rq->bio) {
1005                         if (blk_fs_request(rq)) {
1006                                 ptr = rq->buffer;
1007                                 blen = rq->current_nr_sectors << 9;
1008                         } else {
1009                                 ptr = bio_data(rq->bio);
1010                                 blen = bio_iovec(rq->bio)->bv_len;
1011                         }
1012                 }
1013
1014                 if (!ptr) {
1015                         if (blk_fs_request(rq) && !write)
1016                                 /*
1017                                  * If the buffers are full, pipe the rest into
1018                                  * oblivion.
1019                                  */
1020                                 ide_pad_transfer(drive, 0, thislen);
1021                         else {
1022                                 printk(KERN_ERR "%s: confused, missing data\n",
1023                                                 drive->name);
1024                                 blk_dump_rq_flags(rq, rq_data_dir(rq)
1025                                                   ? "cdrom_newpc_intr, write"
1026                                                   : "cdrom_newpc_intr, read");
1027                         }
1028                         break;
1029                 }
1030
1031                 if (blen > thislen)
1032                         blen = thislen;
1033
1034                 xferfunc(drive, NULL, ptr, blen);
1035
1036                 thislen -= blen;
1037                 len -= blen;
1038
1039                 if (blk_fs_request(rq)) {
1040                         rq->buffer += blen;
1041                         rq->nr_sectors -= (blen >> 9);
1042                         rq->current_nr_sectors -= (blen >> 9);
1043                         rq->sector += (blen >> 9);
1044
1045                         if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1046                                 cdrom_end_request(drive, 1);
1047                 } else {
1048                         rq->data_len -= blen;
1049
1050                         /*
1051                          * The request can't be completed until DRQ is cleared.
1052                          * So complete the data, but don't complete the request
1053                          * using the dummy function for the callback feature
1054                          * of blk_end_request_callback().
1055                          */
1056                         if (rq->bio)
1057                                 blk_end_request_callback(rq, 0, blen,
1058                                                  cdrom_newpc_intr_dummy_cb);
1059                         else
1060                                 rq->data += blen;
1061                 }
1062                 if (!write && blk_sense_request(rq))
1063                         rq->sense_len += blen;
1064         }
1065
1066         /* pad, if necessary */
1067         if (!blk_fs_request(rq) && len > 0)
1068                 ide_pad_transfer(drive, write, len);
1069
1070         if (blk_pc_request(rq)) {
1071                 timeout = rq->timeout;
1072         } else {
1073                 timeout = ATAPI_WAIT_PC;
1074                 if (!blk_fs_request(rq))
1075                         expiry = cdrom_timer_expiry;
1076         }
1077
1078         ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1079         return ide_started;
1080
1081 end_request:
1082         if (blk_pc_request(rq)) {
1083                 unsigned long flags;
1084                 unsigned int dlen = rq->data_len;
1085
1086                 if (dma)
1087                         rq->data_len = 0;
1088
1089                 spin_lock_irqsave(&ide_lock, flags);
1090                 if (__blk_end_request(rq, 0, dlen))
1091                         BUG();
1092                 HWGROUP(drive)->rq = NULL;
1093                 spin_unlock_irqrestore(&ide_lock, flags);
1094         } else {
1095                 if (!uptodate)
1096                         rq->cmd_flags |= REQ_FAILED;
1097                 cdrom_end_request(drive, uptodate);
1098         }
1099         return ide_stopped;
1100 }
1101
1102 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1103 {
1104         struct cdrom_info *cd = drive->driver_data;
1105         int write = rq_data_dir(rq) == WRITE;
1106         unsigned short sectors_per_frame =
1107                 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1108
1109         if (write) {
1110                 /* disk has become write protected */
1111                 if (get_disk_ro(cd->disk)) {
1112                         cdrom_end_request(drive, 0);
1113                         return ide_stopped;
1114                 }
1115         } else {
1116                 /*
1117                  * We may be retrying this request after an error.  Fix up any
1118                  * weirdness which might be present in the request packet.
1119                  */
1120                 restore_request(rq);
1121         }
1122
1123         /* use DMA, if possible / writes *must* be hardware frame aligned */
1124         if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1125             (rq->sector & (sectors_per_frame - 1))) {
1126                 if (write) {
1127                         cdrom_end_request(drive, 0);
1128                         return ide_stopped;
1129                 }
1130                 cd->dma = 0;
1131         } else
1132                 cd->dma = drive->using_dma;
1133
1134         if (write)
1135                 cd->devinfo.media_written = 1;
1136
1137         return ide_started;
1138 }
1139
1140 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1141 {
1142         struct request *rq = HWGROUP(drive)->rq;
1143
1144         return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1145 }
1146
1147 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1148 {
1149         struct cdrom_info *info = drive->driver_data;
1150
1151         if (blk_pc_request(rq))
1152                 rq->cmd_flags |= REQ_QUIET;
1153         else
1154                 rq->cmd_flags &= ~REQ_FAILED;
1155
1156         info->dma = 0;
1157
1158         /* sg request */
1159         if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1160                 struct request_queue *q = drive->queue;
1161                 unsigned int alignment;
1162                 char *buf;
1163
1164                 if (rq->bio)
1165                         buf = bio_data(rq->bio);
1166                 else
1167                         buf = rq->data;
1168
1169                 info->dma = drive->using_dma;
1170
1171                 /*
1172                  * check if dma is safe
1173                  *
1174                  * NOTE! The "len" and "addr" checks should possibly have
1175                  * separate masks.
1176                  */
1177                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1178                 if ((unsigned long)buf & alignment || rq->data_len & alignment
1179                     || object_is_on_stack(buf))
1180                         info->dma = 0;
1181         }
1182 }
1183
1184 /*
1185  * cdrom driver request routine.
1186  */
1187 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1188                                         sector_t block)
1189 {
1190         struct cdrom_info *info = drive->driver_data;
1191         ide_handler_t *fn;
1192         int xferlen;
1193
1194         if (blk_fs_request(rq)) {
1195                 if (drive->atapi_flags & IDE_AFLAG_SEEKING) {
1196                         ide_hwif_t *hwif = drive->hwif;
1197                         unsigned long elapsed = jiffies - info->start_seek;
1198                         int stat = hwif->tp_ops->read_status(hwif);
1199
1200                         if ((stat & ATA_DSC) != ATA_DSC) {
1201                                 if (elapsed < IDECD_SEEK_TIMEOUT) {
1202                                         ide_stall_queue(drive,
1203                                                         IDECD_SEEK_TIMER);
1204                                         return ide_stopped;
1205                                 }
1206                                 printk(KERN_ERR "%s: DSC timeout\n",
1207                                                 drive->name);
1208                         }
1209                         drive->atapi_flags &= ~IDE_AFLAG_SEEKING;
1210                 }
1211                 if (rq_data_dir(rq) == READ &&
1212                     IDE_LARGE_SEEK(info->last_block, block,
1213                             IDECD_SEEK_THRESHOLD) &&
1214                     drive->dsc_overlap) {
1215                         xferlen = 0;
1216                         fn = cdrom_start_seek_continuation;
1217
1218                         info->dma = 0;
1219                         info->start_seek = jiffies;
1220
1221                         ide_cd_prepare_seek_request(drive, rq);
1222                 } else {
1223                         xferlen = 32768;
1224                         fn = cdrom_start_rw_cont;
1225
1226                         if (cdrom_start_rw(drive, rq) == ide_stopped)
1227                                 return ide_stopped;
1228
1229                         if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1230                                 return ide_stopped;
1231                 }
1232                 info->last_block = block;
1233         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1234                    rq->cmd_type == REQ_TYPE_ATA_PC) {
1235                 xferlen = rq->data_len;
1236                 fn = cdrom_do_newpc_cont;
1237
1238                 if (!rq->timeout)
1239                         rq->timeout = ATAPI_WAIT_PC;
1240
1241                 cdrom_do_block_pc(drive, rq);
1242         } else if (blk_special_request(rq)) {
1243                 /* right now this can only be a reset... */
1244                 cdrom_end_request(drive, 1);
1245                 return ide_stopped;
1246         } else {
1247                 blk_dump_rq_flags(rq, "ide-cd bad flags");
1248                 cdrom_end_request(drive, 0);
1249                 return ide_stopped;
1250         }
1251
1252         return cdrom_start_packet_command(drive, xferlen, fn);
1253 }
1254
1255 /*
1256  * Ioctl handling.
1257  *
1258  * Routines which queue packet commands take as a final argument a pointer to a
1259  * request_sense struct. If execution of the command results in an error with a
1260  * CHECK CONDITION status, this structure will be filled with the results of the
1261  * subsequent request sense command. The pointer can also be NULL, in which case
1262  * no sense information is returned.
1263  */
1264 static void msf_from_bcd(struct atapi_msf *msf)
1265 {
1266         msf->minute = bcd2bin(msf->minute);
1267         msf->second = bcd2bin(msf->second);
1268         msf->frame  = bcd2bin(msf->frame);
1269 }
1270
1271 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1272 {
1273         struct cdrom_info *info = drive->driver_data;
1274         struct cdrom_device_info *cdi = &info->devinfo;
1275         unsigned char cmd[BLK_MAX_CDB];
1276
1277         memset(cmd, 0, BLK_MAX_CDB);
1278         cmd[0] = GPCMD_TEST_UNIT_READY;
1279
1280         /*
1281          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1282          * instead of supporting the LOAD_UNLOAD opcode.
1283          */
1284         cmd[7] = cdi->sanyo_slot % 3;
1285
1286         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1287 }
1288
1289 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1290                                unsigned long *sectors_per_frame,
1291                                struct request_sense *sense)
1292 {
1293         struct {
1294                 __be32 lba;
1295                 __be32 blocklen;
1296         } capbuf;
1297
1298         int stat;
1299         unsigned char cmd[BLK_MAX_CDB];
1300         unsigned len = sizeof(capbuf);
1301         u32 blocklen;
1302
1303         memset(cmd, 0, BLK_MAX_CDB);
1304         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1305
1306         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1307                                REQ_QUIET);
1308         if (stat)
1309                 return stat;
1310
1311         /*
1312          * Sanity check the given block size
1313          */
1314         blocklen = be32_to_cpu(capbuf.blocklen);
1315         switch (blocklen) {
1316         case 512:
1317         case 1024:
1318         case 2048:
1319         case 4096:
1320                 break;
1321         default:
1322                 printk(KERN_ERR "%s: weird block size %u\n",
1323                         drive->name, blocklen);
1324                 printk(KERN_ERR "%s: default to 2kb block size\n",
1325                         drive->name);
1326                 blocklen = 2048;
1327                 break;
1328         }
1329
1330         *capacity = 1 + be32_to_cpu(capbuf.lba);
1331         *sectors_per_frame = blocklen >> SECTOR_BITS;
1332         return 0;
1333 }
1334
1335 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1336                                 int format, char *buf, int buflen,
1337                                 struct request_sense *sense)
1338 {
1339         unsigned char cmd[BLK_MAX_CDB];
1340
1341         memset(cmd, 0, BLK_MAX_CDB);
1342
1343         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1344         cmd[6] = trackno;
1345         cmd[7] = (buflen >> 8);
1346         cmd[8] = (buflen & 0xff);
1347         cmd[9] = (format << 6);
1348
1349         if (msf_flag)
1350                 cmd[1] = 2;
1351
1352         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1353 }
1354
1355 /* Try to read the entire TOC for the disk into our internal buffer. */
1356 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1357 {
1358         int stat, ntracks, i;
1359         struct cdrom_info *info = drive->driver_data;
1360         struct cdrom_device_info *cdi = &info->devinfo;
1361         struct atapi_toc *toc = info->toc;
1362         struct {
1363                 struct atapi_toc_header hdr;
1364                 struct atapi_toc_entry  ent;
1365         } ms_tmp;
1366         long last_written;
1367         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1368
1369         if (toc == NULL) {
1370                 /* try to allocate space */
1371                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1372                 if (toc == NULL) {
1373                         printk(KERN_ERR "%s: No cdrom TOC buffer!\n",
1374                                         drive->name);
1375                         return -ENOMEM;
1376                 }
1377                 info->toc = toc;
1378         }
1379
1380         /*
1381          * Check to see if the existing data is still valid. If it is,
1382          * just return.
1383          */
1384         (void) cdrom_check_status(drive, sense);
1385
1386         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1387                 return 0;
1388
1389         /* try to get the total cdrom capacity and sector size */
1390         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1391                                    sense);
1392         if (stat)
1393                 toc->capacity = 0x1fffff;
1394
1395         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1396         /* save a private copy of the TOC capacity for error handling */
1397         drive->probed_capacity = toc->capacity * sectors_per_frame;
1398
1399         blk_queue_hardsect_size(drive->queue,
1400                                 sectors_per_frame << SECTOR_BITS);
1401
1402         /* first read just the header, so we know how long the TOC is */
1403         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1404                                     sizeof(struct atapi_toc_header), sense);
1405         if (stat)
1406                 return stat;
1407
1408         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1409                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1410                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1411         }
1412
1413         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1414         if (ntracks <= 0)
1415                 return -EIO;
1416         if (ntracks > MAX_TRACKS)
1417                 ntracks = MAX_TRACKS;
1418
1419         /* now read the whole schmeer */
1420         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1421                                   (char *)&toc->hdr,
1422                                    sizeof(struct atapi_toc_header) +
1423                                    (ntracks + 1) *
1424                                    sizeof(struct atapi_toc_entry), sense);
1425
1426         if (stat && toc->hdr.first_track > 1) {
1427                 /*
1428                  * Cds with CDI tracks only don't have any TOC entries, despite
1429                  * of this the returned values are
1430                  * first_track == last_track = number of CDI tracks + 1,
1431                  * so that this case is indistinguishable from the same layout
1432                  * plus an additional audio track. If we get an error for the
1433                  * regular case, we assume a CDI without additional audio
1434                  * tracks. In this case the readable TOC is empty (CDI tracks
1435                  * are not included) and only holds the Leadout entry.
1436                  *
1437                  * Heiko Eißfeldt.
1438                  */
1439                 ntracks = 0;
1440                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1441                                            (char *)&toc->hdr,
1442                                            sizeof(struct atapi_toc_header) +
1443                                            (ntracks + 1) *
1444                                            sizeof(struct atapi_toc_entry),
1445                                            sense);
1446                 if (stat)
1447                         return stat;
1448
1449                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1450                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1451                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1452                 } else {
1453                         toc->hdr.first_track = CDROM_LEADOUT;
1454                         toc->hdr.last_track = CDROM_LEADOUT;
1455                 }
1456         }
1457
1458         if (stat)
1459                 return stat;
1460
1461         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1462
1463         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1464                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1465                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1466         }
1467
1468         for (i = 0; i <= ntracks; i++) {
1469                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1470                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1471                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1472                         msf_from_bcd(&toc->ent[i].addr.msf);
1473                 }
1474                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1475                                                   toc->ent[i].addr.msf.second,
1476                                                   toc->ent[i].addr.msf.frame);
1477         }
1478
1479         if (toc->hdr.first_track != CDROM_LEADOUT) {
1480                 /* read the multisession information */
1481                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1482                                            sizeof(ms_tmp), sense);
1483                 if (stat)
1484                         return stat;
1485
1486                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1487         } else {
1488                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1489                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1490                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1491         }
1492
1493         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1494                 /* re-read multisession information using MSF format */
1495                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1496                                            sizeof(ms_tmp), sense);
1497                 if (stat)
1498                         return stat;
1499
1500                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1501                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1502                                                    ms_tmp.ent.addr.msf.second,
1503                                                    ms_tmp.ent.addr.msf.frame);
1504         }
1505
1506         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1507
1508         /* now try to get the total cdrom capacity */
1509         stat = cdrom_get_last_written(cdi, &last_written);
1510         if (!stat && (last_written > toc->capacity)) {
1511                 toc->capacity = last_written;
1512                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1513                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1514         }
1515
1516         /* Remember that we've read this stuff. */
1517         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1518
1519         return 0;
1520 }
1521
1522 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1523 {
1524         struct cdrom_info *info = drive->driver_data;
1525         struct cdrom_device_info *cdi = &info->devinfo;
1526         struct packet_command cgc;
1527         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1528
1529         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1530                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1531
1532         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1533         do {
1534                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1535                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1536                 if (!stat)
1537                         break;
1538         } while (--attempts);
1539         return stat;
1540 }
1541
1542 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1543 {
1544         struct cdrom_info *cd = drive->driver_data;
1545         u16 curspeed, maxspeed;
1546
1547         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1548                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1549                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1550         } else {
1551                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1552                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1553         }
1554
1555         cd->current_speed = (curspeed + (176/2)) / 176;
1556         cd->max_speed = (maxspeed + (176/2)) / 176;
1557 }
1558
1559 #define IDE_CD_CAPABILITIES \
1560         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1561          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1562          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1563          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1564          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1565
1566 static struct cdrom_device_ops ide_cdrom_dops = {
1567         .open                   = ide_cdrom_open_real,
1568         .release                = ide_cdrom_release_real,
1569         .drive_status           = ide_cdrom_drive_status,
1570         .media_changed          = ide_cdrom_check_media_change_real,
1571         .tray_move              = ide_cdrom_tray_move,
1572         .lock_door              = ide_cdrom_lock_door,
1573         .select_speed           = ide_cdrom_select_speed,
1574         .get_last_session       = ide_cdrom_get_last_session,
1575         .get_mcn                = ide_cdrom_get_mcn,
1576         .reset                  = ide_cdrom_reset,
1577         .audio_ioctl            = ide_cdrom_audio_ioctl,
1578         .capability             = IDE_CD_CAPABILITIES,
1579         .generic_packet         = ide_cdrom_packet,
1580 };
1581
1582 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1583 {
1584         struct cdrom_info *info = drive->driver_data;
1585         struct cdrom_device_info *devinfo = &info->devinfo;
1586
1587         devinfo->ops = &ide_cdrom_dops;
1588         devinfo->speed = info->current_speed;
1589         devinfo->capacity = nslots;
1590         devinfo->handle = drive;
1591         strcpy(devinfo->name, drive->name);
1592
1593         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1594                 devinfo->mask |= CDC_SELECT_SPEED;
1595
1596         devinfo->disk = info->disk;
1597         return register_cdrom(devinfo);
1598 }
1599
1600 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1601 {
1602         struct cdrom_info *cd = drive->driver_data;
1603         struct cdrom_device_info *cdi = &cd->devinfo;
1604         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1605         mechtype_t mechtype;
1606         int nslots = 1;
1607
1608         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1609                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1610                      CDC_MO_DRIVE | CDC_RAM);
1611
1612         if (drive->media == ide_optical) {
1613                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1614                 printk(KERN_ERR "%s: ATAPI magneto-optical drive\n",
1615                                 drive->name);
1616                 return nslots;
1617         }
1618
1619         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1620                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1621                 cdi->mask &= ~CDC_PLAY_AUDIO;
1622                 return nslots;
1623         }
1624
1625         /*
1626          * We have to cheat a little here. the packet will eventually be queued
1627          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1628          * Since this device hasn't been registered with the Uniform layer yet,
1629          * it can't do this. Same goes for cdi->ops.
1630          */
1631         cdi->handle = drive;
1632         cdi->ops = &ide_cdrom_dops;
1633
1634         if (ide_cdrom_get_capabilities(drive, buf))
1635                 return 0;
1636
1637         if ((buf[8 + 6] & 0x01) == 0)
1638                 drive->atapi_flags |= IDE_AFLAG_NO_DOORLOCK;
1639         if (buf[8 + 6] & 0x08)
1640                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1641         if (buf[8 + 3] & 0x01)
1642                 cdi->mask &= ~CDC_CD_R;
1643         if (buf[8 + 3] & 0x02)
1644                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1645         if (buf[8 + 2] & 0x38)
1646                 cdi->mask &= ~CDC_DVD;
1647         if (buf[8 + 3] & 0x20)
1648                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1649         if (buf[8 + 3] & 0x10)
1650                 cdi->mask &= ~CDC_DVD_R;
1651         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1652                 cdi->mask &= ~CDC_PLAY_AUDIO;
1653
1654         mechtype = buf[8 + 6] >> 5;
1655         if (mechtype == mechtype_caddy ||
1656             mechtype == mechtype_popup ||
1657             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1658                 cdi->mask |= CDC_CLOSE_TRAY;
1659
1660         if (cdi->sanyo_slot > 0) {
1661                 cdi->mask &= ~CDC_SELECT_DISC;
1662                 nslots = 3;
1663         } else if (mechtype == mechtype_individual_changer ||
1664                    mechtype == mechtype_cartridge_changer) {
1665                 nslots = cdrom_number_of_slots(cdi);
1666                 if (nslots > 1)
1667                         cdi->mask &= ~CDC_SELECT_DISC;
1668         }
1669
1670         ide_cdrom_update_speed(drive, buf);
1671
1672         printk(KERN_INFO "%s: ATAPI", drive->name);
1673
1674         /* don't print speed if the drive reported 0 */
1675         if (cd->max_speed)
1676                 printk(KERN_CONT " %dX", cd->max_speed);
1677
1678         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1679
1680         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1681                 printk(KERN_CONT " DVD%s%s",
1682                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1683                                  (cdi->mask & CDC_DVD_RAM) ? "" : "-RAM");
1684
1685         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1686                 printk(KERN_CONT " CD%s%s",
1687                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1688                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1689
1690         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1691                 printk(KERN_CONT " changer w/%d slots", nslots);
1692         else
1693                 printk(KERN_CONT " drive");
1694
1695         printk(KERN_CONT ", %dkB Cache\n", be16_to_cpup((__be16 *)&buf[8 + 12]));
1696
1697         return nslots;
1698 }
1699
1700 /* standard prep_rq_fn that builds 10 byte cmds */
1701 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1702 {
1703         int hard_sect = queue_hardsect_size(q);
1704         long block = (long)rq->hard_sector / (hard_sect >> 9);
1705         unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1706
1707         memset(rq->cmd, 0, BLK_MAX_CDB);
1708
1709         if (rq_data_dir(rq) == READ)
1710                 rq->cmd[0] = GPCMD_READ_10;
1711         else
1712                 rq->cmd[0] = GPCMD_WRITE_10;
1713
1714         /*
1715          * fill in lba
1716          */
1717         rq->cmd[2] = (block >> 24) & 0xff;
1718         rq->cmd[3] = (block >> 16) & 0xff;
1719         rq->cmd[4] = (block >>  8) & 0xff;
1720         rq->cmd[5] = block & 0xff;
1721
1722         /*
1723          * and transfer length
1724          */
1725         rq->cmd[7] = (blocks >> 8) & 0xff;
1726         rq->cmd[8] = blocks & 0xff;
1727         rq->cmd_len = 10;
1728         return BLKPREP_OK;
1729 }
1730
1731 /*
1732  * Most of the SCSI commands are supported directly by ATAPI devices.
1733  * This transform handles the few exceptions.
1734  */
1735 static int ide_cdrom_prep_pc(struct request *rq)
1736 {
1737         u8 *c = rq->cmd;
1738
1739         /* transform 6-byte read/write commands to the 10-byte version */
1740         if (c[0] == READ_6 || c[0] == WRITE_6) {
1741                 c[8] = c[4];
1742                 c[5] = c[3];
1743                 c[4] = c[2];
1744                 c[3] = c[1] & 0x1f;
1745                 c[2] = 0;
1746                 c[1] &= 0xe0;
1747                 c[0] += (READ_10 - READ_6);
1748                 rq->cmd_len = 10;
1749                 return BLKPREP_OK;
1750         }
1751
1752         /*
1753          * it's silly to pretend we understand 6-byte sense commands, just
1754          * reject with ILLEGAL_REQUEST and the caller should take the
1755          * appropriate action
1756          */
1757         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1758                 rq->errors = ILLEGAL_REQUEST;
1759                 return BLKPREP_KILL;
1760         }
1761
1762         return BLKPREP_OK;
1763 }
1764
1765 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1766 {
1767         if (blk_fs_request(rq))
1768                 return ide_cdrom_prep_fs(q, rq);
1769         else if (blk_pc_request(rq))
1770                 return ide_cdrom_prep_pc(rq);
1771
1772         return 0;
1773 }
1774
1775 struct cd_list_entry {
1776         const char      *id_model;
1777         const char      *id_firmware;
1778         unsigned int    cd_flags;
1779 };
1780
1781 #ifdef CONFIG_IDE_PROC_FS
1782 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1783 {
1784         unsigned long capacity, sectors_per_frame;
1785
1786         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1787                 return 0;
1788
1789         return capacity * sectors_per_frame;
1790 }
1791
1792 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1793                                         int count, int *eof, void *data)
1794 {
1795         ide_drive_t *drive = data;
1796         int len;
1797
1798         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1799         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1800 }
1801
1802 static ide_proc_entry_t idecd_proc[] = {
1803         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1804         { NULL, 0, NULL, NULL }
1805 };
1806
1807 ide_devset_rw_field(dsc_overlap, dsc_overlap);
1808
1809 static const struct ide_proc_devset idecd_settings[] = {
1810         IDE_PROC_DEVSET(dsc_overlap, 0, 1),
1811         { 0 },
1812 };
1813 #endif
1814
1815 static const struct cd_list_entry ide_cd_quirks_list[] = {
1816         /* Limit transfer size per interrupt. */
1817         { "SAMSUNG CD-ROM SCR-2430", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1818         { "SAMSUNG CD-ROM SCR-2432", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1819         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1820         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1821         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1822         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1823                                              IDE_AFLAG_PRE_ATAPI12,          },
1824         /* Vertos 300, some versions of this drive like to talk BCD. */
1825         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1826         /* Vertos 600 ESD. */
1827         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1828         /*
1829          * Sanyo 3 CD changer uses a non-standard command for CD changing
1830          * (by default standard ATAPI support for CD changers is used).
1831          */
1832         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1833         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1834         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1835         /* Stingray 8X CD-ROM. */
1836         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1837         /*
1838          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1839          * mode sense page capabilities size, but older drives break.
1840          */
1841         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1842         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1843         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1844         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1845         /*
1846          * Some drives used by Apple don't advertise audio play
1847          * but they do support reading TOC & audio datas.
1848          */
1849         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1850         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1851         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1852         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1853         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1854         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1855         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1856         { NULL, NULL, 0 }
1857 };
1858
1859 static unsigned int ide_cd_flags(u16 *id)
1860 {
1861         const struct cd_list_entry *cle = ide_cd_quirks_list;
1862
1863         while (cle->id_model) {
1864                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1865                     (cle->id_firmware == NULL ||
1866                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1867                         return cle->cd_flags;
1868                 cle++;
1869         }
1870
1871         return 0;
1872 }
1873
1874 static int ide_cdrom_setup(ide_drive_t *drive)
1875 {
1876         struct cdrom_info *cd = drive->driver_data;
1877         struct cdrom_device_info *cdi = &cd->devinfo;
1878         u16 *id = drive->id;
1879         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1880         int nslots;
1881
1882         blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1883         blk_queue_dma_alignment(drive->queue, 31);
1884         blk_queue_update_dma_pad(drive->queue, 15);
1885         drive->queue->unplug_delay = (1 * HZ) / 1000;
1886         if (!drive->queue->unplug_delay)
1887                 drive->queue->unplug_delay = 1;
1888
1889         drive->special.all      = 0;
1890
1891         drive->atapi_flags = IDE_AFLAG_MEDIA_CHANGED | IDE_AFLAG_NO_EJECT |
1892                        ide_cd_flags(id);
1893
1894         if ((id[ATA_ID_CONFIG] & 0x0060) == 0x20)
1895                 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
1896
1897         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1898             fw_rev[4] == '1' && fw_rev[6] <= '2')
1899                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1900                                      IDE_AFLAG_TOCADDR_AS_BCD);
1901         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1902                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1903                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1904         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1905                 /* 3 => use CD in slot 0 */
1906                 cdi->sanyo_slot = 3;
1907
1908         nslots = ide_cdrom_probe_capabilities(drive);
1909
1910         /* set correct block size */
1911         blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1912
1913         drive->dsc_overlap = (drive->next != drive);
1914
1915         if (ide_cdrom_register(drive, nslots)) {
1916                 printk(KERN_ERR "%s: %s failed to register device with the"
1917                                 " cdrom driver.\n", drive->name, __func__);
1918                 cd->devinfo.handle = NULL;
1919                 return 1;
1920         }
1921
1922         ide_proc_register_driver(drive, cd->driver);
1923         return 0;
1924 }
1925
1926 static void ide_cd_remove(ide_drive_t *drive)
1927 {
1928         struct cdrom_info *info = drive->driver_data;
1929
1930         ide_proc_unregister_driver(drive, info->driver);
1931
1932         del_gendisk(info->disk);
1933
1934         ide_cd_put(info);
1935 }
1936
1937 static void ide_cd_release(struct kref *kref)
1938 {
1939         struct cdrom_info *info = to_ide_drv(kref, cdrom_info);
1940         struct cdrom_device_info *devinfo = &info->devinfo;
1941         ide_drive_t *drive = info->drive;
1942         struct gendisk *g = info->disk;
1943
1944         kfree(info->toc);
1945         if (devinfo->handle == drive)
1946                 unregister_cdrom(devinfo);
1947         drive->dsc_overlap = 0;
1948         drive->driver_data = NULL;
1949         blk_queue_prep_rq(drive->queue, NULL);
1950         g->private_data = NULL;
1951         put_disk(g);
1952         kfree(info);
1953 }
1954
1955 static int ide_cd_probe(ide_drive_t *);
1956
1957 static ide_driver_t ide_cdrom_driver = {
1958         .gen_driver = {
1959                 .owner          = THIS_MODULE,
1960                 .name           = "ide-cdrom",
1961                 .bus            = &ide_bus_type,
1962         },
1963         .probe                  = ide_cd_probe,
1964         .remove                 = ide_cd_remove,
1965         .version                = IDECD_VERSION,
1966         .media                  = ide_cdrom,
1967         .do_request             = ide_cd_do_request,
1968         .end_request            = ide_end_request,
1969         .error                  = __ide_error,
1970 #ifdef CONFIG_IDE_PROC_FS
1971         .proc                   = idecd_proc,
1972         .settings               = idecd_settings,
1973 #endif
1974 };
1975
1976 static int idecd_open(struct inode *inode, struct file *file)
1977 {
1978         struct gendisk *disk = inode->i_bdev->bd_disk;
1979         struct cdrom_info *info;
1980         int rc = -ENOMEM;
1981
1982         info = ide_cd_get(disk);
1983         if (!info)
1984                 return -ENXIO;
1985
1986         rc = cdrom_open(&info->devinfo, inode, file);
1987
1988         if (rc < 0)
1989                 ide_cd_put(info);
1990
1991         return rc;
1992 }
1993
1994 static int idecd_release(struct inode *inode, struct file *file)
1995 {
1996         struct gendisk *disk = inode->i_bdev->bd_disk;
1997         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1998
1999         cdrom_release(&info->devinfo, file);
2000
2001         ide_cd_put(info);
2002
2003         return 0;
2004 }
2005
2006 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2007 {
2008         struct packet_command cgc;
2009         char buffer[16];
2010         int stat;
2011         char spindown;
2012
2013         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
2014                 return -EFAULT;
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         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
2023         return cdrom_mode_select(cdi, &cgc);
2024 }
2025
2026 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2027 {
2028         struct packet_command cgc;
2029         char buffer[16];
2030         int stat;
2031         char spindown;
2032
2033         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2034
2035         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2036         if (stat)
2037                 return stat;
2038
2039         spindown = buffer[11] & 0x0f;
2040         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
2041                 return -EFAULT;
2042         return 0;
2043 }
2044
2045 static int idecd_ioctl(struct inode *inode, struct file *file,
2046                         unsigned int cmd, unsigned long arg)
2047 {
2048         struct block_device *bdev = inode->i_bdev;
2049         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
2050         int err;
2051
2052         switch (cmd) {
2053         case CDROMSETSPINDOWN:
2054                 return idecd_set_spindown(&info->devinfo, arg);
2055         case CDROMGETSPINDOWN:
2056                 return idecd_get_spindown(&info->devinfo, arg);
2057         default:
2058                 break;
2059         }
2060
2061         err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg);
2062         if (err == -EINVAL)
2063                 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg);
2064
2065         return err;
2066 }
2067
2068 static int idecd_media_changed(struct gendisk *disk)
2069 {
2070         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2071         return cdrom_media_changed(&info->devinfo);
2072 }
2073
2074 static int idecd_revalidate_disk(struct gendisk *disk)
2075 {
2076         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2077         struct request_sense sense;
2078
2079         ide_cd_read_toc(info->drive, &sense);
2080
2081         return  0;
2082 }
2083
2084 static struct block_device_operations idecd_ops = {
2085         .owner                  = THIS_MODULE,
2086         .open                   = idecd_open,
2087         .release                = idecd_release,
2088         .ioctl                  = idecd_ioctl,
2089         .media_changed          = idecd_media_changed,
2090         .revalidate_disk        = idecd_revalidate_disk
2091 };
2092
2093 /* module options */
2094 static char *ignore;
2095
2096 module_param(ignore, charp, 0400);
2097 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2098
2099 static int ide_cd_probe(ide_drive_t *drive)
2100 {
2101         struct cdrom_info *info;
2102         struct gendisk *g;
2103         struct request_sense sense;
2104
2105         if (!strstr("ide-cdrom", drive->driver_req))
2106                 goto failed;
2107
2108         if (drive->media != ide_cdrom && drive->media != ide_optical)
2109                 goto failed;
2110
2111         /* skip drives that we were told to ignore */
2112         if (ignore != NULL) {
2113                 if (strstr(ignore, drive->name)) {
2114                         printk(KERN_INFO "ide-cd: ignoring drive %s\n",
2115                                          drive->name);
2116                         goto failed;
2117                 }
2118         }
2119         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2120         if (info == NULL) {
2121                 printk(KERN_ERR "%s: Can't allocate a cdrom structure\n",
2122                                 drive->name);
2123                 goto failed;
2124         }
2125
2126         g = alloc_disk(1 << PARTN_BITS);
2127         if (!g)
2128                 goto out_free_cd;
2129
2130         ide_init_disk(g, drive);
2131
2132         kref_init(&info->kref);
2133
2134         info->drive = drive;
2135         info->driver = &ide_cdrom_driver;
2136         info->disk = g;
2137
2138         g->private_data = &info->driver;
2139
2140         drive->driver_data = info;
2141
2142         g->minors = 1;
2143         g->driverfs_dev = &drive->gendev;
2144         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2145         if (ide_cdrom_setup(drive)) {
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");