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 DRV_NAME "ide-cd"
  27 #define PFX DRV_NAME ": "
  28
  29 #define IDECD_VERSION "5.00"
  30
  31 #include <linux/module.h>
  32 #include <linux/types.h>
  33 #include <linux/kernel.h>
  34 #include <linux/delay.h>
  35 #include <linux/timer.h>
  36 #include <linux/slab.h>
  37 #include <linux/interrupt.h>
  38 #include <linux/errno.h>
  39 #include <linux/cdrom.h>
  40 #include <linux/ide.h>
  41 #include <linux/completion.h>
  42 #include <linux/mutex.h>
  43 #include <linux/bcd.h>
  44
  45 /* For SCSI -> ATAPI command conversion */
  46 #include <scsi/scsi.h>
  47
  48 #include <linux/irq.h>
  49 #include <linux/io.h>
  50 #include <asm/byteorder.h>
  51 #include <linux/uaccess.h>
  52 #include <asm/unaligned.h>
  53
  54 #include "ide-cd.h"
  55
  56 static DEFINE_MUTEX(idecd_ref_mutex);
  57
  58 static void ide_cd_release(struct device *);
  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_drv_g(disk, cdrom_info);
  66         if (cd) {
  67                 if (ide_device_get(cd->drive))
  68                         cd = NULL;
  69                 else
  70                         get_device(&cd->dev);
  71
  72         }
  73         mutex_unlock(&idecd_ref_mutex);
  74         return cd;
  75 }
  76
  77 static void ide_cd_put(struct cdrom_info *cd)
  78 {
  79         ide_drive_t *drive = cd->drive;
  80
  81         mutex_lock(&idecd_ref_mutex);
  82         put_device(&cd->dev);
  83         ide_device_put(drive);
  84         mutex_unlock(&idecd_ref_mutex);
  85 }
  86
  87 /*
  88  * Generic packet command support and error handling routines.
  89  */
  90
  91 /* Mark that we've seen a media change and invalidate our internal buffers. */
  92 static void cdrom_saw_media_change(ide_drive_t *drive)
  93 {
  94         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
  95         drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
  96 }
  97
  98 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
  99                            struct request_sense *sense)
 100 {
 101         int log = 0;
 102
 103         ide_debug_log(IDE_DBG_SENSE, "Call %s, sense_key: 0x%x\n", __func__,
 104                       sense->sense_key);
 105
 106         if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
 107                 return 0;
 108
 109         switch (sense->sense_key) {
 110         case NO_SENSE:
 111         case RECOVERED_ERROR:
 112                 break;
 113         case NOT_READY:
 114                 /*
 115                  * don't care about tray state messages for e.g. capacity
 116                  * commands or in-progress or becoming ready
 117                  */
 118                 if (sense->asc == 0x3a || sense->asc == 0x04)
 119                         break;
 120                 log = 1;
 121                 break;
 122         case ILLEGAL_REQUEST:
 123                 /*
 124                  * don't log START_STOP unit with LoEj set, since we cannot
 125                  * reliably check if drive can auto-close
 126                  */
 127                 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
 128                         break;
 129                 log = 1;
 130                 break;
 131         case UNIT_ATTENTION:
 132                 /*
 133                  * Make good and sure we've seen this potential media change.
 134                  * Some drives (i.e. Creative) fail to present the correct sense
 135                  * key in the error register.
 136                  */
 137                 cdrom_saw_media_change(drive);
 138                 break;
 139         default:
 140                 log = 1;
 141                 break;
 142         }
 143         return log;
 144 }
 145
 146 static void cdrom_analyze_sense_data(ide_drive_t *drive,
 147                               struct request *failed_command,
 148                               struct request_sense *sense)
 149 {
 150         unsigned long sector;
 151         unsigned long bio_sectors;
 152         struct cdrom_info *info = drive->driver_data;
 153
 154         ide_debug_log(IDE_DBG_SENSE, "Call %s, error_code: 0x%x, "
 155                         "sense_key: 0x%x\n", __func__, sense->error_code,
 156                         sense->sense_key);
 157
 158         if (failed_command)
 159                 ide_debug_log(IDE_DBG_SENSE, "%s: failed cmd: 0x%x\n",
 160                                 __func__, failed_command->cmd[0]);
 161
 162         if (!cdrom_log_sense(drive, failed_command, sense))
 163                 return;
 164
 165         /*
 166          * If a read toc is executed for a CD-R or CD-RW medium where the first
 167          * toc has not been recorded yet, it will fail with 05/24/00 (which is a
 168          * confusing error)
 169          */
 170         if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
 171                 if (sense->sense_key == 0x05 && sense->asc == 0x24)
 172                         return;
 173
 174         /* current error */
 175         if (sense->error_code == 0x70) {
 176                 switch (sense->sense_key) {
 177                 case MEDIUM_ERROR:
 178                 case VOLUME_OVERFLOW:
 179                 case ILLEGAL_REQUEST:
 180                         if (!sense->valid)
 181                                 break;
 182                         if (failed_command == NULL ||
 183                                         !blk_fs_request(failed_command))
 184                                 break;
 185                         sector = (sense->information[0] << 24) |
 186                                  (sense->information[1] << 16) |
 187                                  (sense->information[2] <<  8) |
 188                                  (sense->information[3]);
 189
 190                         if (drive->queue->hardsect_size == 2048)
 191                                 /* device sector size is 2K */
 192                                 sector <<= 2;
 193
 194                         bio_sectors = max(bio_sectors(failed_command->bio), 4U);
 195                         sector &= ~(bio_sectors - 1);
 196
 197                         /*
 198                          * The SCSI specification allows for the value
 199                          * returned by READ CAPACITY to be up to 75 2K
 200                          * sectors past the last readable block.
 201                          * Therefore, if we hit a medium error within the
 202                          * last 75 2K sectors, we decrease the saved size
 203                          * value.
 204                          */
 205                         if (sector < get_capacity(info->disk) &&
 206                             drive->probed_capacity - sector < 4 * 75)
 207                                 set_capacity(info->disk, sector);
 208                 }
 209         }
 210
 211         ide_cd_log_error(drive->name, failed_command, sense);
 212 }
 213
 214 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
 215                                       struct request *failed_command)
 216 {
 217         struct cdrom_info *info         = drive->driver_data;
 218         struct request *rq              = &info->request_sense_request;
 219
 220         ide_debug_log(IDE_DBG_SENSE, "Call %s\n", __func__);
 221
 222         if (sense == NULL)
 223                 sense = &info->sense_data;
 224
 225         /* stuff the sense request in front of our current request */
 226         blk_rq_init(NULL, rq);
 227         rq->cmd_type = REQ_TYPE_ATA_PC;
 228         rq->rq_disk = info->disk;
 229
 230         rq->data = sense;
 231         rq->cmd[0] = GPCMD_REQUEST_SENSE;
 232         rq->cmd[4] = 18;
 233         rq->data_len = 18;
 234
 235         rq->cmd_type = REQ_TYPE_SENSE;
 236         rq->cmd_flags |= REQ_PREEMPT;
 237
 238         /* NOTE! Save the failed command in "rq->buffer" */
 239         rq->buffer = (void *) failed_command;
 240
 241         if (failed_command)
 242                 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x\n",
 243                               failed_command->cmd[0]);
 244
 245         drive->hwif->rq = NULL;
 246
 247         elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0);
 248 }
 249
 250 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
 251 {
 252         struct request *rq = drive->hwif->rq;
 253         int nsectors = rq->hard_cur_sectors;
 254
 255         ide_debug_log(IDE_DBG_FUNC, "Call %s, cmd: 0x%x, uptodate: 0x%x, "
 256                       "nsectors: %d\n", __func__, rq->cmd[0], uptodate,
 257                       nsectors);
 258
 259         if (blk_sense_request(rq) && uptodate) {
 260                 /*
 261                  * For REQ_TYPE_SENSE, "rq->buffer" points to the original
 262                  * failed request
 263                  */
 264                 struct request *failed = (struct request *) rq->buffer;
 265                 struct cdrom_info *info = drive->driver_data;
 266                 void *sense = &info->sense_data;
 267
 268                 if (failed) {
 269                         if (failed->sense) {
 270                                 sense = failed->sense;
 271                                 failed->sense_len = rq->sense_len;
 272                         }
 273                         cdrom_analyze_sense_data(drive, failed, sense);
 274                         /*
 275                          * now end the failed request
 276                          */
 277                         if (blk_fs_request(failed)) {
 278                                 if (ide_end_dequeued_request(drive, failed, 0,
 279                                                 failed->hard_nr_sectors))
 280                                         BUG();
 281                         } else {
 282                                 if (blk_end_request(failed, -EIO,
 283                                                     failed->data_len))
 284                                         BUG();
 285                         }
 286                 } else
 287                         cdrom_analyze_sense_data(drive, NULL, sense);
 288         }
 289
 290         if (!rq->current_nr_sectors && blk_fs_request(rq))
 291                 uptodate = 1;
 292         /* make sure it's fully ended */
 293         if (blk_pc_request(rq))
 294                 nsectors = (rq->data_len + 511) >> 9;
 295         if (!nsectors)
 296                 nsectors = 1;
 297
 298         ide_debug_log(IDE_DBG_FUNC, "Exit %s, uptodate: 0x%x, nsectors: %d\n",
 299                       __func__, uptodate, nsectors);
 300
 301         ide_end_request(drive, uptodate, nsectors);
 302 }
 303
 304 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
 305 {
 306         if (st & 0x80)
 307                 return;
 308         ide_dump_status(drive, msg, st);
 309 }
 310
 311 /*
 312  * Returns:
 313  * 0: if the request should be continued.
 314  * 1: if the request was ended.
 315  */
 316 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
 317 {
 318         ide_hwif_t *hwif = drive->hwif;
 319         struct request *rq = hwif->rq;
 320         int stat, err, sense_key;
 321
 322         /* check for errors */
 323         stat = hwif->tp_ops->read_status(hwif);
 324
 325         if (stat_ret)
 326                 *stat_ret = stat;
 327
 328         if (OK_STAT(stat, good_stat, BAD_R_STAT))
 329                 return 0;
 330
 331         /* get the IDE error register */
 332         err = ide_read_error(drive);
 333         sense_key = err >> 4;
 334
 335         if (rq == NULL) {
 336                 printk(KERN_ERR PFX "%s: missing rq in %s\n",
 337                                 drive->name, __func__);
 338                 return 1;
 339         }
 340
 341         ide_debug_log(IDE_DBG_RQ, "%s: stat: 0x%x, good_stat: 0x%x, "
 342                       "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x, err: 0x%x\n",
 343                       __func__, stat, good_stat, rq->cmd[0], rq->cmd_type, err);
 344
 345         if (blk_sense_request(rq)) {
 346                 /*
 347                  * We got an error trying to get sense info from the drive
 348                  * (probably while trying to recover from a former error).
 349                  * Just give up.
 350                  */
 351                 rq->cmd_flags |= REQ_FAILED;
 352                 cdrom_end_request(drive, 0);
 353                 ide_error(drive, "request sense failure", stat);
 354                 return 1;
 355
 356         } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
 357                 /* All other functions, except for READ. */
 358
 359                 /*
 360                  * if we have an error, pass back CHECK_CONDITION as the
 361                  * scsi status byte
 362                  */
 363                 if (blk_pc_request(rq) && !rq->errors)
 364                         rq->errors = SAM_STAT_CHECK_CONDITION;
 365
 366                 /* check for tray open */
 367                 if (sense_key == NOT_READY) {
 368                         cdrom_saw_media_change(drive);
 369                 } else if (sense_key == UNIT_ATTENTION) {
 370                         /* check for media change */
 371                         cdrom_saw_media_change(drive);
 372                         return 0;
 373                 } else if (sense_key == ILLEGAL_REQUEST &&
 374                            rq->cmd[0] == GPCMD_START_STOP_UNIT) {
 375                         /*
 376                          * Don't print error message for this condition--
 377                          * SFF8090i indicates that 5/24/00 is the correct
 378                          * response to a request to close the tray if the
 379                          * drive doesn't have that capability.
 380                          * cdrom_log_sense() knows this!
 381                          */
 382                 } else if (!(rq->cmd_flags & REQ_QUIET)) {
 383                         /* otherwise, print an error */
 384                         ide_dump_status(drive, "packet command error", stat);
 385                 }
 386
 387                 rq->cmd_flags |= REQ_FAILED;
 388
 389                 /*
 390                  * instead of playing games with moving completions around,
 391                  * remove failed request completely and end it when the
 392                  * request sense has completed
 393                  */
 394                 goto end_request;
 395
 396         } else if (blk_fs_request(rq)) {
 397                 int do_end_request = 0;
 398
 399                 /* handle errors from READ and WRITE requests */
 400
 401                 if (blk_noretry_request(rq))
 402                         do_end_request = 1;
 403
 404                 if (sense_key == NOT_READY) {
 405                         /* tray open */
 406                         if (rq_data_dir(rq) == READ) {
 407                                 cdrom_saw_media_change(drive);
 408
 409                                 /* fail the request */
 410                                 printk(KERN_ERR PFX "%s: tray open\n",
 411                                                 drive->name);
 412                                 do_end_request = 1;
 413                         } else {
 414                                 struct cdrom_info *info = drive->driver_data;
 415
 416                                 /*
 417                                  * Allow the drive 5 seconds to recover, some
 418                                  * devices will return this error while flushing
 419                                  * data from cache.
 420                                  */
 421                                 if (!rq->errors)
 422                                         info->write_timeout = jiffies +
 423                                                         ATAPI_WAIT_WRITE_BUSY;
 424                                 rq->errors = 1;
 425                                 if (time_after(jiffies, info->write_timeout))
 426                                         do_end_request = 1;
 427                                 else {
 428                                         struct request_queue *q = drive->queue;
 429                                         unsigned long flags;
 430
 431                                         /*
 432                                          * take a breather relying on the unplug
 433                                          * timer to kick us again
 434                                          */
 435                                         spin_lock_irqsave(q->queue_lock, flags);
 436                                         blk_plug_device(q);
 437                                         spin_unlock_irqrestore(q->queue_lock, flags);
 438
 439                                         return 1;
 440                                 }
 441                         }
 442                 } else if (sense_key == UNIT_ATTENTION) {
 443                         /* media change */
 444                         cdrom_saw_media_change(drive);
 445
 446                         /*
 447                          * Arrange to retry the request but be sure to give up
 448                          * if we've retried too many times.
 449                          */
 450                         if (++rq->errors > ERROR_MAX)
 451                                 do_end_request = 1;
 452                 } else if (sense_key == ILLEGAL_REQUEST ||
 453                            sense_key == DATA_PROTECT) {
 454                         /*
 455                          * No point in retrying after an illegal request or data
 456                          * protect error.
 457                          */
 458                         ide_dump_status_no_sense(drive, "command error", stat);
 459                         do_end_request = 1;
 460                 } else if (sense_key == MEDIUM_ERROR) {
 461                         /*
 462                          * No point in re-trying a zillion times on a bad
 463                          * sector. If we got here the error is not correctable.
 464                          */
 465                         ide_dump_status_no_sense(drive,
 466                                                  "media error (bad sector)",
 467                                                  stat);
 468                         do_end_request = 1;
 469                 } else if (sense_key == BLANK_CHECK) {
 470                         /* disk appears blank ?? */
 471                         ide_dump_status_no_sense(drive, "media error (blank)",
 472                                                  stat);
 473                         do_end_request = 1;
 474                 } else if ((err & ~ATA_ABORTED) != 0) {
 475                         /* go to the default handler for other errors */
 476                         ide_error(drive, "cdrom_decode_status", stat);
 477                         return 1;
 478                 } else if ((++rq->errors > ERROR_MAX)) {
 479                         /* we've racked up too many retries, abort */
 480                         do_end_request = 1;
 481                 }
 482
 483                 /*
 484                  * End a request through request sense analysis when we have
 485                  * sense data. We need this in order to perform end of media
 486                  * processing.
 487                  */
 488                 if (do_end_request)
 489                         goto end_request;
 490
 491                 /*
 492                  * If we got a CHECK_CONDITION status, queue
 493                  * a request sense command.
 494                  */
 495                 if (stat & ATA_ERR)
 496                         cdrom_queue_request_sense(drive, NULL, NULL);
 497         } else {
 498                 blk_dump_rq_flags(rq, PFX "bad rq");
 499                 cdrom_end_request(drive, 0);
 500         }
 501
 502         /* retry, or handle the next request */
 503         return 1;
 504
 505 end_request:
 506         if (stat & ATA_ERR) {
 507                 struct request_queue *q = drive->queue;
 508                 unsigned long flags;
 509
 510                 spin_lock_irqsave(q->queue_lock, flags);
 511                 blkdev_dequeue_request(rq);
 512                 spin_unlock_irqrestore(q->queue_lock, flags);
 513
 514                 hwif->rq = NULL;
 515
 516                 cdrom_queue_request_sense(drive, rq->sense, rq);
 517         } else
 518                 cdrom_end_request(drive, 0);
 519
 520         return 1;
 521 }
 522
 523 /*
 524  * Check the contents of the interrupt reason register from the cdrom
 525  * and attempt to recover if there are problems.  Returns  0 if everything's
 526  * ok; nonzero if the request has been terminated.
 527  */
 528 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
 529                                 int len, int ireason, int rw)
 530 {
 531         ide_hwif_t *hwif = drive->hwif;
 532
 533         ide_debug_log(IDE_DBG_FUNC, "Call %s, ireason: 0x%x, rw: 0x%x\n",
 534                       __func__, ireason, rw);
 535
 536         /*
 537          * ireason == 0: the drive wants to receive data from us
 538          * ireason == 2: the drive is expecting to transfer data to us
 539          */
 540         if (ireason == (!rw << 1))
 541                 return 0;
 542         else if (ireason == (rw << 1)) {
 543
 544                 /* whoops... */
 545                 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
 546                                 drive->name, __func__);
 547
 548                 ide_pad_transfer(drive, rw, len);
 549         } else  if (rw == 0 && ireason == 1) {
 550                 /*
 551                  * Some drives (ASUS) seem to tell us that status info is
 552                  * available.  Just get it and ignore.
 553                  */
 554                 (void)hwif->tp_ops->read_status(hwif);
 555                 return 0;
 556         } else {
 557                 /* drive wants a command packet, or invalid ireason... */
 558                 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
 559                                 drive->name, __func__, ireason);
 560         }
 561
 562         if (rq->cmd_type == REQ_TYPE_ATA_PC)
 563                 rq->cmd_flags |= REQ_FAILED;
 564
 565         cdrom_end_request(drive, 0);
 566         return -1;
 567 }
 568
 569 /*
 570  * Assume that the drive will always provide data in multiples of at least
 571  * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
 572  */
 573 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
 574 {
 575         ide_debug_log(IDE_DBG_FUNC, "Call %s, len: %d\n", __func__, len);
 576
 577         if ((len % SECTOR_SIZE) == 0)
 578                 return 0;
 579
 580         printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
 581                         __func__, len);
 582
 583         if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
 584                 printk(KERN_ERR PFX "This drive is not supported by this "
 585                                 "version of the driver\n");
 586         else {
 587                 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
 588                 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
 589         }
 590
 591         return 1;
 592 }
 593
 594 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
 595                                                  struct request *rq)
 596 {
 597         ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd_flags: 0x%x\n", __func__,
 598                       rq->cmd_flags);
 599
 600         if (rq_data_dir(rq) == READ) {
 601                 unsigned short sectors_per_frame =
 602                         queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 603                 int nskip = rq->sector & (sectors_per_frame - 1);
 604
 605                 /*
 606                  * If the requested sector doesn't start on a frame boundary,
 607                  * we must adjust the start of the transfer so that it does,
 608                  * and remember to skip the first few sectors.
 609                  *
 610                  * If the rq->current_nr_sectors field is larger than the size
 611                  * of the buffer, it will mean that we're to skip a number of
 612                  * sectors equal to the amount by which rq->current_nr_sectors
 613                  * is larger than the buffer size.
 614                  */
 615                 if (nskip > 0) {
 616                         /* sanity check... */
 617                         if (rq->current_nr_sectors !=
 618                             bio_cur_sectors(rq->bio)) {
 619                                 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
 620                                                 drive->name, __func__,
 621                                                 rq->current_nr_sectors);
 622                                 cdrom_end_request(drive, 0);
 623                                 return ide_stopped;
 624                         }
 625                         rq->current_nr_sectors += nskip;
 626                 }
 627         }
 628
 629         /* set up the command */
 630         rq->timeout = ATAPI_WAIT_PC;
 631
 632         return ide_started;
 633 }
 634
 635 /*
 636  * Fix up a possibly partially-processed request so that we can start it over
 637  * entirely, or even put it back on the request queue.
 638  */
 639 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
 640 {
 641
 642         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
 643
 644         if (rq->buffer != bio_data(rq->bio)) {
 645                 sector_t n =
 646                         (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
 647
 648                 rq->buffer = bio_data(rq->bio);
 649                 rq->nr_sectors += n;
 650                 rq->sector -= n;
 651         }
 652         rq->current_nr_sectors = bio_cur_sectors(rq->bio);
 653         rq->hard_cur_sectors = rq->current_nr_sectors;
 654         rq->hard_nr_sectors = rq->nr_sectors;
 655         rq->hard_sector = rq->sector;
 656         rq->q->prep_rq_fn(rq->q, rq);
 657 }
 658
 659 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
 660 {
 661         ide_debug_log(IDE_DBG_FUNC, "Call %s, rq->cmd[0]: 0x%x\n",
 662                       __func__, rq->cmd[0]);
 663
 664         /*
 665          * Some of the trailing request sense fields are optional,
 666          * and some drives don't send them.  Sigh.
 667          */
 668         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 669             rq->data_len > 0 && rq->data_len <= 5)
 670                 while (rq->data_len > 0) {
 671                         *(u8 *)rq->data++ = 0;
 672                         --rq->data_len;
 673                 }
 674 }
 675
 676 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 677                     int write, void *buffer, unsigned *bufflen,
 678                     struct request_sense *sense, int timeout,
 679                     unsigned int cmd_flags)
 680 {
 681         struct cdrom_info *info = drive->driver_data;
 682         struct request_sense local_sense;
 683         int retries = 10;
 684         unsigned int flags = 0;
 685
 686         if (!sense)
 687                 sense = &local_sense;
 688
 689         ide_debug_log(IDE_DBG_PC, "Call %s, cmd[0]: 0x%x, write: 0x%x, "
 690                       "timeout: %d, cmd_flags: 0x%x\n", __func__, cmd[0], write,
 691                       timeout, cmd_flags);
 692
 693         /* start of retry loop */
 694         do {
 695                 struct request *rq;
 696                 int error;
 697
 698                 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
 699
 700                 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
 701                 rq->cmd_type = REQ_TYPE_ATA_PC;
 702                 rq->sense = sense;
 703                 rq->cmd_flags |= cmd_flags;
 704                 rq->timeout = timeout;
 705                 if (buffer) {
 706                         rq->data = buffer;
 707                         rq->data_len = *bufflen;
 708                 }
 709
 710                 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 711
 712                 if (buffer)
 713                         *bufflen = rq->data_len;
 714
 715                 flags = rq->cmd_flags;
 716                 blk_put_request(rq);
 717
 718                 /*
 719                  * FIXME: we should probably abort/retry or something in case of
 720                  * failure.
 721                  */
 722                 if (flags & REQ_FAILED) {
 723                         /*
 724                          * The request failed.  Retry if it was due to a unit
 725                          * attention status (usually means media was changed).
 726                          */
 727                         struct request_sense *reqbuf = sense;
 728
 729                         if (reqbuf->sense_key == UNIT_ATTENTION)
 730                                 cdrom_saw_media_change(drive);
 731                         else if (reqbuf->sense_key == NOT_READY &&
 732                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 733                                 /*
 734                                  * The drive is in the process of loading
 735                                  * a disk.  Retry, but wait a little to give
 736                                  * the drive time to complete the load.
 737                                  */
 738                                 ssleep(2);
 739                         } else {
 740                                 /* otherwise, don't retry */
 741                                 retries = 0;
 742                         }
 743                         --retries;
 744                 }
 745
 746                 /* end of retry loop */
 747         } while ((flags & REQ_FAILED) && retries >= 0);
 748
 749         /* return an error if the command failed */
 750         return (flags & REQ_FAILED) ? -EIO : 0;
 751 }
 752
 753 /*
 754  * Called from blk_end_request_callback() after the data of the request is
 755  * completed and before the request itself is completed. By returning value '1',
 756  * blk_end_request_callback() returns immediately without completing it.
 757  */
 758 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
 759 {
 760         return 1;
 761 }
 762
 763 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 764 {
 765         ide_hwif_t *hwif = drive->hwif;
 766         struct request *rq = hwif->rq;
 767         xfer_func_t *xferfunc;
 768         ide_expiry_t *expiry = NULL;
 769         int dma_error = 0, dma, stat, thislen, uptodate = 0;
 770         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
 771         unsigned int timeout;
 772         u16 len;
 773         u8 ireason;
 774
 775         ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x\n",
 776                       __func__, rq->cmd[0], write);
 777
 778         /* check for errors */
 779         dma = drive->dma;
 780         if (dma) {
 781                 drive->dma = 0;
 782                 dma_error = hwif->dma_ops->dma_end(drive);
 783                 if (dma_error) {
 784                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 785                                         write ? "write" : "read");
 786                         ide_dma_off(drive);
 787                 }
 788         }
 789
 790         if (cdrom_decode_status(drive, 0, &stat))
 791                 return ide_stopped;
 792
 793         /* using dma, transfer is complete now */
 794         if (dma) {
 795                 if (dma_error)
 796                         return ide_error(drive, "dma error", stat);
 797                 if (blk_fs_request(rq)) {
 798                         ide_end_request(drive, 1, rq->nr_sectors);
 799                         return ide_stopped;
 800                 } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) {
 801                         ide_end_request(drive, 1, 1);
 802                         return ide_stopped;
 803                 }
 804                 goto end_request;
 805         }
 806
 807         ide_read_bcount_and_ireason(drive, &len, &ireason);
 808
 809         thislen = blk_fs_request(rq) ? len : rq->data_len;
 810         if (thislen > len)
 811                 thislen = len;
 812
 813         ide_debug_log(IDE_DBG_PC, "%s: DRQ: stat: 0x%x, thislen: %d\n",
 814                       __func__, stat, thislen);
 815
 816         /* If DRQ is clear, the command has completed. */
 817         if ((stat & ATA_DRQ) == 0) {
 818                 if (blk_fs_request(rq)) {
 819                         /*
 820                          * If we're not done reading/writing, complain.
 821                          * Otherwise, complete the command normally.
 822                          */
 823                         uptodate = 1;
 824                         if (rq->current_nr_sectors > 0) {
 825                                 printk(KERN_ERR PFX "%s: %s: data underrun "
 826                                                 "(%d blocks)\n",
 827                                                 drive->name, __func__,
 828                                                 rq->current_nr_sectors);
 829                                 if (!write)
 830                                         rq->cmd_flags |= REQ_FAILED;
 831                                 uptodate = 0;
 832                         }
 833                         cdrom_end_request(drive, uptodate);
 834                         return ide_stopped;
 835                 } else if (!blk_pc_request(rq)) {
 836                         ide_cd_request_sense_fixup(drive, rq);
 837                         /* complain if we still have data left to transfer */
 838                         uptodate = rq->data_len ? 0 : 1;
 839                 }
 840                 goto end_request;
 841         }
 842
 843         /* check which way to transfer data */
 844         if (ide_cd_check_ireason(drive, rq, len, ireason, write))
 845                 return ide_stopped;
 846
 847         if (blk_fs_request(rq)) {
 848                 if (write == 0) {
 849                         int nskip;
 850
 851                         if (ide_cd_check_transfer_size(drive, len)) {
 852                                 cdrom_end_request(drive, 0);
 853                                 return ide_stopped;
 854                         }
 855
 856                         /*
 857                          * First, figure out if we need to bit-bucket
 858                          * any of the leading sectors.
 859                          */
 860                         nskip = min_t(int, rq->current_nr_sectors
 861                                            - bio_cur_sectors(rq->bio),
 862                                            thislen >> 9);
 863                         if (nskip > 0) {
 864                                 ide_pad_transfer(drive, write, nskip << 9);
 865                                 rq->current_nr_sectors -= nskip;
 866                                 thislen -= (nskip << 9);
 867                         }
 868                 }
 869         }
 870
 871         if (ireason == 0) {
 872                 write = 1;
 873                 xferfunc = hwif->tp_ops->output_data;
 874         } else {
 875                 write = 0;
 876                 xferfunc = hwif->tp_ops->input_data;
 877         }
 878
 879         ide_debug_log(IDE_DBG_PC, "%s: data transfer, rq->cmd_type: 0x%x, "
 880                       "ireason: 0x%x\n", __func__, rq->cmd_type, ireason);
 881
 882         /* transfer data */
 883         while (thislen > 0) {
 884                 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
 885                 int blen = rq->data_len;
 886
 887                 /* bio backed? */
 888                 if (rq->bio) {
 889                         if (blk_fs_request(rq)) {
 890                                 ptr = rq->buffer;
 891                                 blen = rq->current_nr_sectors << 9;
 892                         } else {
 893                                 ptr = bio_data(rq->bio);
 894                                 blen = bio_iovec(rq->bio)->bv_len;
 895                         }
 896                 }
 897
 898                 if (!ptr) {
 899                         if (blk_fs_request(rq) && !write)
 900                                 /*
 901                                  * If the buffers are full, pipe the rest into
 902                                  * oblivion.
 903                                  */
 904                                 ide_pad_transfer(drive, 0, thislen);
 905                         else {
 906                                 printk(KERN_ERR PFX "%s: confused, missing data\n",
 907                                                 drive->name);
 908                                 blk_dump_rq_flags(rq, rq_data_dir(rq)
 909                                                   ? "cdrom_newpc_intr, write"
 910                                                   : "cdrom_newpc_intr, read");
 911                         }
 912                         break;
 913                 }
 914
 915                 if (blen > thislen)
 916                         blen = thislen;
 917
 918                 xferfunc(drive, NULL, ptr, blen);
 919
 920                 thislen -= blen;
 921                 len -= blen;
 922
 923                 if (blk_fs_request(rq)) {
 924                         rq->buffer += blen;
 925                         rq->nr_sectors -= (blen >> 9);
 926                         rq->current_nr_sectors -= (blen >> 9);
 927                         rq->sector += (blen >> 9);
 928
 929                         if (rq->current_nr_sectors == 0 && rq->nr_sectors)
 930                                 cdrom_end_request(drive, 1);
 931                 } else {
 932                         rq->data_len -= blen;
 933
 934                         /*
 935                          * The request can't be completed until DRQ is cleared.
 936                          * So complete the data, but don't complete the request
 937                          * using the dummy function for the callback feature
 938                          * of blk_end_request_callback().
 939                          */
 940                         if (rq->bio)
 941                                 blk_end_request_callback(rq, 0, blen,
 942                                                  cdrom_newpc_intr_dummy_cb);
 943                         else
 944                                 rq->data += blen;
 945                 }
 946                 if (!write && blk_sense_request(rq))
 947                         rq->sense_len += blen;
 948         }
 949
 950         /* pad, if necessary */
 951         if (!blk_fs_request(rq) && len > 0)
 952                 ide_pad_transfer(drive, write, len);
 953
 954         if (blk_pc_request(rq)) {
 955                 timeout = rq->timeout;
 956         } else {
 957                 timeout = ATAPI_WAIT_PC;
 958                 if (!blk_fs_request(rq))
 959                         expiry = ide_cd_expiry;
 960         }
 961
 962         ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
 963         return ide_started;
 964
 965 end_request:
 966         if (blk_pc_request(rq)) {
 967                 unsigned int dlen = rq->data_len;
 968
 969                 if (dma)
 970                         rq->data_len = 0;
 971
 972                 if (blk_end_request(rq, 0, dlen))
 973                         BUG();
 974
 975                 hwif->rq = NULL;
 976         } else {
 977                 if (!uptodate)
 978                         rq->cmd_flags |= REQ_FAILED;
 979                 cdrom_end_request(drive, uptodate);
 980         }
 981         return ide_stopped;
 982 }
 983
 984 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 985 {
 986         struct cdrom_info *cd = drive->driver_data;
 987         int write = rq_data_dir(rq) == WRITE;
 988         unsigned short sectors_per_frame =
 989                 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 990
 991         ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x, "
 992                       "secs_per_frame: %u\n",
 993                       __func__, rq->cmd[0], write, sectors_per_frame);
 994
 995         if (write) {
 996                 /* disk has become write protected */
 997                 if (get_disk_ro(cd->disk)) {
 998                         cdrom_end_request(drive, 0);
 999                         return ide_stopped;
1000                 }
1001         } else {
1002                 /*
1003                  * We may be retrying this request after an error.  Fix up any
1004                  * weirdness which might be present in the request packet.
1005                  */
1006                 ide_cd_restore_request(drive, rq);
1007         }
1008
1009         /* use DMA, if possible / writes *must* be hardware frame aligned */
1010         if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1011             (rq->sector & (sectors_per_frame - 1))) {
1012                 if (write) {
1013                         cdrom_end_request(drive, 0);
1014                         return ide_stopped;
1015                 }
1016                 drive->dma = 0;
1017         } else
1018                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1019
1020         if (write)
1021                 cd->devinfo.media_written = 1;
1022
1023         return ide_started;
1024 }
1025
1026 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1027 {
1028
1029         ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, "
1030                       "rq->cmd_type: 0x%x\n", __func__, rq->cmd[0],
1031                       rq->cmd_type);
1032
1033         if (blk_pc_request(rq))
1034                 rq->cmd_flags |= REQ_QUIET;
1035         else
1036                 rq->cmd_flags &= ~REQ_FAILED;
1037
1038         drive->dma = 0;
1039
1040         /* sg request */
1041         if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1042                 struct request_queue *q = drive->queue;
1043                 unsigned int alignment;
1044                 char *buf;
1045
1046                 if (rq->bio)
1047                         buf = bio_data(rq->bio);
1048                 else
1049                         buf = rq->data;
1050
1051                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1052
1053                 /*
1054                  * check if dma is safe
1055                  *
1056                  * NOTE! The "len" and "addr" checks should possibly have
1057                  * separate masks.
1058                  */
1059                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1060                 if ((unsigned long)buf & alignment
1061                     || rq->data_len & q->dma_pad_mask
1062                     || object_is_on_stack(buf))
1063                         drive->dma = 0;
1064         }
1065 }
1066
1067 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1068                                         sector_t block)
1069 {
1070         ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, "
1071                       "rq->cmd_type: 0x%x, block: %llu\n",
1072                       __func__, rq->cmd[0], rq->cmd_type,
1073                       (unsigned long long)block);
1074
1075         if (blk_fs_request(rq)) {
1076                 if (cdrom_start_rw(drive, rq) == ide_stopped)
1077                         return ide_stopped;
1078
1079                 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1080                         return ide_stopped;
1081         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1082                    rq->cmd_type == REQ_TYPE_ATA_PC) {
1083                 if (!rq->timeout)
1084                         rq->timeout = ATAPI_WAIT_PC;
1085
1086                 cdrom_do_block_pc(drive, rq);
1087         } else if (blk_special_request(rq)) {
1088                 /* right now this can only be a reset... */
1089                 cdrom_end_request(drive, 1);
1090                 return ide_stopped;
1091         } else {
1092                 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1093                 cdrom_end_request(drive, 0);
1094                 return ide_stopped;
1095         }
1096
1097         return ide_issue_pc(drive);
1098 }
1099
1100 /*
1101  * Ioctl handling.
1102  *
1103  * Routines which queue packet commands take as a final argument a pointer to a
1104  * request_sense struct. If execution of the command results in an error with a
1105  * CHECK CONDITION status, this structure will be filled with the results of the
1106  * subsequent request sense command. The pointer can also be NULL, in which case
1107  * no sense information is returned.
1108  */
1109 static void msf_from_bcd(struct atapi_msf *msf)
1110 {
1111         msf->minute = bcd2bin(msf->minute);
1112         msf->second = bcd2bin(msf->second);
1113         msf->frame  = bcd2bin(msf->frame);
1114 }
1115
1116 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1117 {
1118         struct cdrom_info *info = drive->driver_data;
1119         struct cdrom_device_info *cdi = &info->devinfo;
1120         unsigned char cmd[BLK_MAX_CDB];
1121
1122         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1123
1124         memset(cmd, 0, BLK_MAX_CDB);
1125         cmd[0] = GPCMD_TEST_UNIT_READY;
1126
1127         /*
1128          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1129          * instead of supporting the LOAD_UNLOAD opcode.
1130          */
1131         cmd[7] = cdi->sanyo_slot % 3;
1132
1133         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1134 }
1135
1136 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1137                                unsigned long *sectors_per_frame,
1138                                struct request_sense *sense)
1139 {
1140         struct {
1141                 __be32 lba;
1142                 __be32 blocklen;
1143         } capbuf;
1144
1145         int stat;
1146         unsigned char cmd[BLK_MAX_CDB];
1147         unsigned len = sizeof(capbuf);
1148         u32 blocklen;
1149
1150         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1151
1152         memset(cmd, 0, BLK_MAX_CDB);
1153         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1154
1155         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1156                                REQ_QUIET);
1157         if (stat)
1158                 return stat;
1159
1160         /*
1161          * Sanity check the given block size
1162          */
1163         blocklen = be32_to_cpu(capbuf.blocklen);
1164         switch (blocklen) {
1165         case 512:
1166         case 1024:
1167         case 2048:
1168         case 4096:
1169                 break;
1170         default:
1171                 printk(KERN_ERR PFX "%s: weird block size %u\n",
1172                                 drive->name, blocklen);
1173                 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1174                                 drive->name);
1175                 blocklen = 2048;
1176                 break;
1177         }
1178
1179         *capacity = 1 + be32_to_cpu(capbuf.lba);
1180         *sectors_per_frame = blocklen >> SECTOR_BITS;
1181
1182         ide_debug_log(IDE_DBG_PROBE, "%s: cap: %lu, sectors_per_frame: %lu\n",
1183                       __func__, *capacity, *sectors_per_frame);
1184
1185         return 0;
1186 }
1187
1188 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1189                                 int format, char *buf, int buflen,
1190                                 struct request_sense *sense)
1191 {
1192         unsigned char cmd[BLK_MAX_CDB];
1193
1194         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1195
1196         memset(cmd, 0, BLK_MAX_CDB);
1197
1198         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1199         cmd[6] = trackno;
1200         cmd[7] = (buflen >> 8);
1201         cmd[8] = (buflen & 0xff);
1202         cmd[9] = (format << 6);
1203
1204         if (msf_flag)
1205                 cmd[1] = 2;
1206
1207         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1208 }
1209
1210 /* Try to read the entire TOC for the disk into our internal buffer. */
1211 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1212 {
1213         int stat, ntracks, i;
1214         struct cdrom_info *info = drive->driver_data;
1215         struct cdrom_device_info *cdi = &info->devinfo;
1216         struct atapi_toc *toc = info->toc;
1217         struct {
1218                 struct atapi_toc_header hdr;
1219                 struct atapi_toc_entry  ent;
1220         } ms_tmp;
1221         long last_written;
1222         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1223
1224         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1225
1226         if (toc == NULL) {
1227                 /* try to allocate space */
1228                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1229                 if (toc == NULL) {
1230                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1231                                         drive->name);
1232                         return -ENOMEM;
1233                 }
1234                 info->toc = toc;
1235         }
1236
1237         /*
1238          * Check to see if the existing data is still valid. If it is,
1239          * just return.
1240          */
1241         (void) cdrom_check_status(drive, sense);
1242
1243         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1244                 return 0;
1245
1246         /* try to get the total cdrom capacity and sector size */
1247         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1248                                    sense);
1249         if (stat)
1250                 toc->capacity = 0x1fffff;
1251
1252         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1253         /* save a private copy of the TOC capacity for error handling */
1254         drive->probed_capacity = toc->capacity * sectors_per_frame;
1255
1256         blk_queue_hardsect_size(drive->queue,
1257                                 sectors_per_frame << SECTOR_BITS);
1258
1259         /* first read just the header, so we know how long the TOC is */
1260         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1261                                     sizeof(struct atapi_toc_header), sense);
1262         if (stat)
1263                 return stat;
1264
1265         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1266                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1267                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1268         }
1269
1270         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1271         if (ntracks <= 0)
1272                 return -EIO;
1273         if (ntracks > MAX_TRACKS)
1274                 ntracks = MAX_TRACKS;
1275
1276         /* now read the whole schmeer */
1277         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1278                                   (char *)&toc->hdr,
1279                                    sizeof(struct atapi_toc_header) +
1280                                    (ntracks + 1) *
1281                                    sizeof(struct atapi_toc_entry), sense);
1282
1283         if (stat && toc->hdr.first_track > 1) {
1284                 /*
1285                  * Cds with CDI tracks only don't have any TOC entries, despite
1286                  * of this the returned values are
1287                  * first_track == last_track = number of CDI tracks + 1,
1288                  * so that this case is indistinguishable from the same layout
1289                  * plus an additional audio track. If we get an error for the
1290                  * regular case, we assume a CDI without additional audio
1291                  * tracks. In this case the readable TOC is empty (CDI tracks
1292                  * are not included) and only holds the Leadout entry.
1293                  *
1294                  * Heiko Eißfeldt.
1295                  */
1296                 ntracks = 0;
1297                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1298                                            (char *)&toc->hdr,
1299                                            sizeof(struct atapi_toc_header) +
1300                                            (ntracks + 1) *
1301                                            sizeof(struct atapi_toc_entry),
1302                                            sense);
1303                 if (stat)
1304                         return stat;
1305
1306                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1307                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1308                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1309                 } else {
1310                         toc->hdr.first_track = CDROM_LEADOUT;
1311                         toc->hdr.last_track = CDROM_LEADOUT;
1312                 }
1313         }
1314
1315         if (stat)
1316                 return stat;
1317
1318         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1319
1320         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1321                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1322                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1323         }
1324
1325         for (i = 0; i <= ntracks; i++) {
1326                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1327                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1328                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1329                         msf_from_bcd(&toc->ent[i].addr.msf);
1330                 }
1331                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1332                                                   toc->ent[i].addr.msf.second,
1333                                                   toc->ent[i].addr.msf.frame);
1334         }
1335
1336         if (toc->hdr.first_track != CDROM_LEADOUT) {
1337                 /* read the multisession information */
1338                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1339                                            sizeof(ms_tmp), sense);
1340                 if (stat)
1341                         return stat;
1342
1343                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1344         } else {
1345                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1346                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1347                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1348         }
1349
1350         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1351                 /* re-read multisession information using MSF format */
1352                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1353                                            sizeof(ms_tmp), sense);
1354                 if (stat)
1355                         return stat;
1356
1357                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1358                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1359                                                    ms_tmp.ent.addr.msf.second,
1360                                                    ms_tmp.ent.addr.msf.frame);
1361         }
1362
1363         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1364
1365         /* now try to get the total cdrom capacity */
1366         stat = cdrom_get_last_written(cdi, &last_written);
1367         if (!stat && (last_written > toc->capacity)) {
1368                 toc->capacity = last_written;
1369                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1370                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1371         }
1372
1373         /* Remember that we've read this stuff. */
1374         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1375
1376         return 0;
1377 }
1378
1379 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1380 {
1381         struct cdrom_info *info = drive->driver_data;
1382         struct cdrom_device_info *cdi = &info->devinfo;
1383         struct packet_command cgc;
1384         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1385
1386         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1387
1388         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1389                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1390
1391         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1392         do {
1393                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1394                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1395                 if (!stat)
1396                         break;
1397         } while (--attempts);
1398         return stat;
1399 }
1400
1401 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1402 {
1403         struct cdrom_info *cd = drive->driver_data;
1404         u16 curspeed, maxspeed;
1405
1406         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1407
1408         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1409                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1410                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1411         } else {
1412                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1413                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1414         }
1415
1416         ide_debug_log(IDE_DBG_PROBE, "%s: curspeed: %u, maxspeed: %u\n",
1417                       __func__, curspeed, maxspeed);
1418
1419         cd->current_speed = (curspeed + (176/2)) / 176;
1420         cd->max_speed = (maxspeed + (176/2)) / 176;
1421 }
1422
1423 #define IDE_CD_CAPABILITIES \
1424         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1425          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1426          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1427          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1428          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1429
1430 static struct cdrom_device_ops ide_cdrom_dops = {
1431         .open                   = ide_cdrom_open_real,
1432         .release                = ide_cdrom_release_real,
1433         .drive_status           = ide_cdrom_drive_status,
1434         .media_changed          = ide_cdrom_check_media_change_real,
1435         .tray_move              = ide_cdrom_tray_move,
1436         .lock_door              = ide_cdrom_lock_door,
1437         .select_speed           = ide_cdrom_select_speed,
1438         .get_last_session       = ide_cdrom_get_last_session,
1439         .get_mcn                = ide_cdrom_get_mcn,
1440         .reset                  = ide_cdrom_reset,
1441         .audio_ioctl            = ide_cdrom_audio_ioctl,
1442         .capability             = IDE_CD_CAPABILITIES,
1443         .generic_packet         = ide_cdrom_packet,
1444 };
1445
1446 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1447 {
1448         struct cdrom_info *info = drive->driver_data;
1449         struct cdrom_device_info *devinfo = &info->devinfo;
1450
1451         ide_debug_log(IDE_DBG_PROBE, "Call %s, nslots: %d\n", __func__, nslots);
1452
1453         devinfo->ops = &ide_cdrom_dops;
1454         devinfo->speed = info->current_speed;
1455         devinfo->capacity = nslots;
1456         devinfo->handle = drive;
1457         strcpy(devinfo->name, drive->name);
1458
1459         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1460                 devinfo->mask |= CDC_SELECT_SPEED;
1461
1462         devinfo->disk = info->disk;
1463         return register_cdrom(devinfo);
1464 }
1465
1466 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1467 {
1468         struct cdrom_info *cd = drive->driver_data;
1469         struct cdrom_device_info *cdi = &cd->devinfo;
1470         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1471         mechtype_t mechtype;
1472         int nslots = 1;
1473
1474         ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->media: 0x%x, "
1475                       "drive->atapi_flags: 0x%lx\n", __func__, drive->media,
1476                       drive->atapi_flags);
1477
1478         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1479                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1480                      CDC_MO_DRIVE | CDC_RAM);
1481
1482         if (drive->media == ide_optical) {
1483                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1484                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1485                                 drive->name);
1486                 return nslots;
1487         }
1488
1489         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1490                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1491                 cdi->mask &= ~CDC_PLAY_AUDIO;
1492                 return nslots;
1493         }
1494
1495         /*
1496          * We have to cheat a little here. the packet will eventually be queued
1497          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1498          * Since this device hasn't been registered with the Uniform layer yet,
1499          * it can't do this. Same goes for cdi->ops.
1500          */
1501         cdi->handle = drive;
1502         cdi->ops = &ide_cdrom_dops;
1503
1504         if (ide_cdrom_get_capabilities(drive, buf))
1505                 return 0;
1506
1507         if ((buf[8 + 6] & 0x01) == 0)
1508                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1509         if (buf[8 + 6] & 0x08)
1510                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1511         if (buf[8 + 3] & 0x01)
1512                 cdi->mask &= ~CDC_CD_R;
1513         if (buf[8 + 3] & 0x02)
1514                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1515         if (buf[8 + 2] & 0x38)
1516                 cdi->mask &= ~CDC_DVD;
1517         if (buf[8 + 3] & 0x20)
1518                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1519         if (buf[8 + 3] & 0x10)
1520                 cdi->mask &= ~CDC_DVD_R;
1521         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1522                 cdi->mask &= ~CDC_PLAY_AUDIO;
1523
1524         mechtype = buf[8 + 6] >> 5;
1525         if (mechtype == mechtype_caddy ||
1526             mechtype == mechtype_popup ||
1527             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1528                 cdi->mask |= CDC_CLOSE_TRAY;
1529
1530         if (cdi->sanyo_slot > 0) {
1531                 cdi->mask &= ~CDC_SELECT_DISC;
1532                 nslots = 3;
1533         } else if (mechtype == mechtype_individual_changer ||
1534                    mechtype == mechtype_cartridge_changer) {
1535                 nslots = cdrom_number_of_slots(cdi);
1536                 if (nslots > 1)
1537                         cdi->mask &= ~CDC_SELECT_DISC;
1538         }
1539
1540         ide_cdrom_update_speed(drive, buf);
1541
1542         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1543
1544         /* don't print speed if the drive reported 0 */
1545         if (cd->max_speed)
1546                 printk(KERN_CONT " %dX", cd->max_speed);
1547
1548         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1549
1550         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1551                 printk(KERN_CONT " DVD%s%s",
1552                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1553                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1554
1555         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1556                 printk(KERN_CONT " CD%s%s",
1557                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1558                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1559
1560         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1561                 printk(KERN_CONT " changer w/%d slots", nslots);
1562         else
1563                 printk(KERN_CONT " drive");
1564
1565         printk(KERN_CONT ", %dkB Cache\n",
1566                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1567
1568         return nslots;
1569 }
1570
1571 /* standard prep_rq_fn that builds 10 byte cmds */
1572 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1573 {
1574         int hard_sect = queue_hardsect_size(q);
1575         long block = (long)rq->hard_sector / (hard_sect >> 9);
1576         unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1577
1578         memset(rq->cmd, 0, BLK_MAX_CDB);
1579
1580         if (rq_data_dir(rq) == READ)
1581                 rq->cmd[0] = GPCMD_READ_10;
1582         else
1583                 rq->cmd[0] = GPCMD_WRITE_10;
1584
1585         /*
1586          * fill in lba
1587          */
1588         rq->cmd[2] = (block >> 24) & 0xff;
1589         rq->cmd[3] = (block >> 16) & 0xff;
1590         rq->cmd[4] = (block >>  8) & 0xff;
1591         rq->cmd[5] = block & 0xff;
1592
1593         /*
1594          * and transfer length
1595          */
1596         rq->cmd[7] = (blocks >> 8) & 0xff;
1597         rq->cmd[8] = blocks & 0xff;
1598         rq->cmd_len = 10;
1599         return BLKPREP_OK;
1600 }
1601
1602 /*
1603  * Most of the SCSI commands are supported directly by ATAPI devices.
1604  * This transform handles the few exceptions.
1605  */
1606 static int ide_cdrom_prep_pc(struct request *rq)
1607 {
1608         u8 *c = rq->cmd;
1609
1610         /* transform 6-byte read/write commands to the 10-byte version */
1611         if (c[0] == READ_6 || c[0] == WRITE_6) {
1612                 c[8] = c[4];
1613                 c[5] = c[3];
1614                 c[4] = c[2];
1615                 c[3] = c[1] & 0x1f;
1616                 c[2] = 0;
1617                 c[1] &= 0xe0;
1618                 c[0] += (READ_10 - READ_6);
1619                 rq->cmd_len = 10;
1620                 return BLKPREP_OK;
1621         }
1622
1623         /*
1624          * it's silly to pretend we understand 6-byte sense commands, just
1625          * reject with ILLEGAL_REQUEST and the caller should take the
1626          * appropriate action
1627          */
1628         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1629                 rq->errors = ILLEGAL_REQUEST;
1630                 return BLKPREP_KILL;
1631         }
1632
1633         return BLKPREP_OK;
1634 }
1635
1636 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1637 {
1638         if (blk_fs_request(rq))
1639                 return ide_cdrom_prep_fs(q, rq);
1640         else if (blk_pc_request(rq))
1641                 return ide_cdrom_prep_pc(rq);
1642
1643         return 0;
1644 }
1645
1646 struct cd_list_entry {
1647         const char      *id_model;
1648         const char      *id_firmware;
1649         unsigned int    cd_flags;
1650 };
1651
1652 #ifdef CONFIG_IDE_PROC_FS
1653 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1654 {
1655         unsigned long capacity, sectors_per_frame;
1656
1657         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1658                 return 0;
1659
1660         return capacity * sectors_per_frame;
1661 }
1662
1663 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1664                                         int count, int *eof, void *data)
1665 {
1666         ide_drive_t *drive = data;
1667         int len;
1668
1669         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1670         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1671 }
1672
1673 static ide_proc_entry_t idecd_proc[] = {
1674         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1675         { NULL, 0, NULL, NULL }
1676 };
1677
1678 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1679 {
1680         return idecd_proc;
1681 }
1682
1683 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1684 {
1685         return NULL;
1686 }
1687 #endif
1688
1689 static const struct cd_list_entry ide_cd_quirks_list[] = {
1690         /* Limit transfer size per interrupt. */
1691         { "SAMSUNG CD-ROM SCR-2430", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1692         { "SAMSUNG CD-ROM SCR-2432", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1693         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1694         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1695         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1696         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1697                                              IDE_AFLAG_PRE_ATAPI12,          },
1698         /* Vertos 300, some versions of this drive like to talk BCD. */
1699         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1700         /* Vertos 600 ESD. */
1701         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1702         /*
1703          * Sanyo 3 CD changer uses a non-standard command for CD changing
1704          * (by default standard ATAPI support for CD changers is used).
1705          */
1706         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1707         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1708         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1709         /* Stingray 8X CD-ROM. */
1710         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1711         /*
1712          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1713          * mode sense page capabilities size, but older drives break.
1714          */
1715         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1716         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1717         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1718         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1719         /*
1720          * Some drives used by Apple don't advertise audio play
1721          * but they do support reading TOC & audio datas.
1722          */
1723         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1724         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1725         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1726         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1727         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1728         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1729         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1730         { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1731         { NULL, NULL, 0 }
1732 };
1733
1734 static unsigned int ide_cd_flags(u16 *id)
1735 {
1736         const struct cd_list_entry *cle = ide_cd_quirks_list;
1737
1738         while (cle->id_model) {
1739                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1740                     (cle->id_firmware == NULL ||
1741                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1742                         return cle->cd_flags;
1743                 cle++;
1744         }
1745
1746         return 0;
1747 }
1748
1749 static int ide_cdrom_setup(ide_drive_t *drive)
1750 {
1751         struct cdrom_info *cd = drive->driver_data;
1752         struct cdrom_device_info *cdi = &cd->devinfo;
1753         u16 *id = drive->id;
1754         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1755         int nslots;
1756
1757         ide_debug_log(IDE_DBG_PROBE, "Call %s\n", __func__);
1758
1759         blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1760         blk_queue_dma_alignment(drive->queue, 31);
1761         blk_queue_update_dma_pad(drive->queue, 15);
1762         drive->queue->unplug_delay = (1 * HZ) / 1000;
1763         if (!drive->queue->unplug_delay)
1764                 drive->queue->unplug_delay = 1;
1765
1766         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1767         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1768
1769         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1770             fw_rev[4] == '1' && fw_rev[6] <= '2')
1771                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1772                                      IDE_AFLAG_TOCADDR_AS_BCD);
1773         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1774                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1775                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1776         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1777                 /* 3 => use CD in slot 0 */
1778                 cdi->sanyo_slot = 3;
1779
1780         nslots = ide_cdrom_probe_capabilities(drive);
1781
1782         /* set correct block size */
1783         blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1784
1785         if (ide_cdrom_register(drive, nslots)) {
1786                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1787                                 " cdrom driver.\n", drive->name, __func__);
1788                 cd->devinfo.handle = NULL;
1789                 return 1;
1790         }
1791
1792         ide_proc_register_driver(drive, cd->driver);
1793         return 0;
1794 }
1795
1796 static void ide_cd_remove(ide_drive_t *drive)
1797 {
1798         struct cdrom_info *info = drive->driver_data;
1799
1800         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1801
1802         ide_proc_unregister_driver(drive, info->driver);
1803         device_del(&info->dev);
1804         del_gendisk(info->disk);
1805
1806         mutex_lock(&idecd_ref_mutex);
1807         put_device(&info->dev);
1808         mutex_unlock(&idecd_ref_mutex);
1809 }
1810
1811 static void ide_cd_release(struct device *dev)
1812 {
1813         struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1814         struct cdrom_device_info *devinfo = &info->devinfo;
1815         ide_drive_t *drive = info->drive;
1816         struct gendisk *g = info->disk;
1817
1818         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1819
1820         kfree(info->toc);
1821         if (devinfo->handle == drive)
1822                 unregister_cdrom(devinfo);
1823         drive->driver_data = NULL;
1824         blk_queue_prep_rq(drive->queue, NULL);
1825         g->private_data = NULL;
1826         put_disk(g);
1827         kfree(info);
1828 }
1829
1830 static int ide_cd_probe(ide_drive_t *);
1831
1832 static struct ide_driver ide_cdrom_driver = {
1833         .gen_driver = {
1834                 .owner          = THIS_MODULE,
1835                 .name           = "ide-cdrom",
1836                 .bus            = &ide_bus_type,
1837         },
1838         .probe                  = ide_cd_probe,
1839         .remove                 = ide_cd_remove,
1840         .version                = IDECD_VERSION,
1841         .do_request             = ide_cd_do_request,
1842         .end_request            = ide_end_request,
1843 #ifdef CONFIG_IDE_PROC_FS
1844         .proc_entries           = ide_cd_proc_entries,
1845         .proc_devsets           = ide_cd_proc_devsets,
1846 #endif
1847 };
1848
1849 static int idecd_open(struct block_device *bdev, fmode_t mode)
1850 {
1851         struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1852         int rc = -ENOMEM;
1853
1854         if (!info)
1855                 return -ENXIO;
1856
1857         rc = cdrom_open(&info->devinfo, bdev, mode);
1858
1859         if (rc < 0)
1860                 ide_cd_put(info);
1861
1862         return rc;
1863 }
1864
1865 static int idecd_release(struct gendisk *disk, fmode_t mode)
1866 {
1867         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1868
1869         cdrom_release(&info->devinfo, mode);
1870
1871         ide_cd_put(info);
1872
1873         return 0;
1874 }
1875
1876 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1877 {
1878         struct packet_command cgc;
1879         char buffer[16];
1880         int stat;
1881         char spindown;
1882
1883         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1884                 return -EFAULT;
1885
1886         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1887
1888         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1889         if (stat)
1890                 return stat;
1891
1892         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1893         return cdrom_mode_select(cdi, &cgc);
1894 }
1895
1896 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1897 {
1898         struct packet_command cgc;
1899         char buffer[16];
1900         int stat;
1901         char spindown;
1902
1903         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1904
1905         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1906         if (stat)
1907                 return stat;
1908
1909         spindown = buffer[11] & 0x0f;
1910         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1911                 return -EFAULT;
1912         return 0;
1913 }
1914
1915 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1916                         unsigned int cmd, unsigned long arg)
1917 {
1918         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1919         int err;
1920
1921         switch (cmd) {
1922         case CDROMSETSPINDOWN:
1923                 return idecd_set_spindown(&info->devinfo, arg);
1924         case CDROMGETSPINDOWN:
1925                 return idecd_get_spindown(&info->devinfo, arg);
1926         default:
1927                 break;
1928         }
1929
1930         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1931         if (err == -EINVAL)
1932                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1933
1934         return err;
1935 }
1936
1937 static int idecd_media_changed(struct gendisk *disk)
1938 {
1939         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1940         return cdrom_media_changed(&info->devinfo);
1941 }
1942
1943 static int idecd_revalidate_disk(struct gendisk *disk)
1944 {
1945         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1946         struct request_sense sense;
1947
1948         ide_cd_read_toc(info->drive, &sense);
1949
1950         return  0;
1951 }
1952
1953 static struct block_device_operations idecd_ops = {
1954         .owner                  = THIS_MODULE,
1955         .open                   = idecd_open,
1956         .release                = idecd_release,
1957         .locked_ioctl           = idecd_ioctl,
1958         .media_changed          = idecd_media_changed,
1959         .revalidate_disk        = idecd_revalidate_disk
1960 };
1961
1962 /* module options */
1963 static char *ignore;
1964 module_param(ignore, charp, 0400);
1965
1966 static unsigned long debug_mask;
1967 module_param(debug_mask, ulong, 0644);
1968
1969 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1970
1971 static int ide_cd_probe(ide_drive_t *drive)
1972 {
1973         struct cdrom_info *info;
1974         struct gendisk *g;
1975         struct request_sense sense;
1976
1977         ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->driver_req: %s, "
1978                       "drive->media: 0x%x\n", __func__, drive->driver_req,
1979                       drive->media);
1980
1981         if (!strstr("ide-cdrom", drive->driver_req))
1982                 goto failed;
1983
1984         if (drive->media != ide_cdrom && drive->media != ide_optical)
1985                 goto failed;
1986
1987         /* skip drives that we were told to ignore */
1988         if (ignore != NULL) {
1989                 if (strstr(ignore, drive->name)) {
1990                         printk(KERN_INFO PFX "ignoring drive %s\n",
1991                                          drive->name);
1992                         goto failed;
1993                 }
1994         }
1995
1996         drive->debug_mask = debug_mask;
1997         drive->irq_handler = cdrom_newpc_intr;
1998
1999         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2000         if (info == NULL) {
2001                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
2002                                 drive->name);
2003                 goto failed;
2004         }
2005
2006         g = alloc_disk(1 << PARTN_BITS);
2007         if (!g)
2008                 goto out_free_cd;
2009
2010         ide_init_disk(g, drive);
2011
2012         info->dev.parent = &drive->gendev;
2013         info->dev.release = ide_cd_release;
2014         dev_set_name(&info->dev, dev_name(&drive->gendev));
2015
2016         if (device_register(&info->dev))
2017                 goto out_free_disk;
2018
2019         info->drive = drive;
2020         info->driver = &ide_cdrom_driver;
2021         info->disk = g;
2022
2023         g->private_data = &info->driver;
2024
2025         drive->driver_data = info;
2026
2027         g->minors = 1;
2028         g->driverfs_dev = &drive->gendev;
2029         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2030         if (ide_cdrom_setup(drive)) {
2031                 put_device(&info->dev);
2032                 goto failed;
2033         }
2034
2035         ide_cd_read_toc(drive, &sense);
2036         g->fops = &idecd_ops;
2037         g->flags |= GENHD_FL_REMOVABLE;
2038         add_disk(g);
2039         return 0;
2040
2041 out_free_disk:
2042         put_disk(g);
2043 out_free_cd:
2044         kfree(info);
2045 failed:
2046         return -ENODEV;
2047 }
2048
2049 static void __exit ide_cdrom_exit(void)
2050 {
2051         driver_unregister(&ide_cdrom_driver.gen_driver);
2052 }
2053
2054 static int __init ide_cdrom_init(void)
2055 {
2056         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2057         return driver_register(&ide_cdrom_driver.gen_driver);
2058 }
2059
2060 MODULE_ALIAS("ide:*m-cdrom*");
2061 MODULE_ALIAS("ide-cd");
2062 module_init(ide_cdrom_init);
2063 module_exit(ide_cdrom_exit);
2064 MODULE_LICENSE("GPL");