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