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  *
  16  * Documentation:
  17  *      Mt. Fuji (SFF8090 version 4) and ATAPI (SFF-8020i rev 2.6) standards.
  18  *
  19  * For historical changelog please see:
  20  *      Documentation/ide/ChangeLog.ide-cd.1994-2004
  21  */
  22
  23 #define DRV_NAME "ide-cd"
  24 #define PFX DRV_NAME ": "
  25
  26 #define IDECD_VERSION "5.00"
  27
  28 #include <linux/module.h>
  29 #include <linux/types.h>
  30 #include <linux/kernel.h>
  31 #include <linux/delay.h>
  32 #include <linux/timer.h>
  33 #include <linux/slab.h>
  34 #include <linux/interrupt.h>
  35 #include <linux/errno.h>
  36 #include <linux/cdrom.h>
  37 #include <linux/ide.h>
  38 #include <linux/completion.h>
  39 #include <linux/mutex.h>
  40 #include <linux/bcd.h>
  41
  42 /* For SCSI -> ATAPI command conversion */
  43 #include <scsi/scsi.h>
  44
  45 #include <linux/irq.h>
  46 #include <linux/io.h>
  47 #include <asm/byteorder.h>
  48 #include <linux/uaccess.h>
  49 #include <asm/unaligned.h>
  50
  51 #include "ide-cd.h"
  52
  53 static DEFINE_MUTEX(idecd_ref_mutex);
  54
  55 static void ide_cd_release(struct device *);
  56
  57 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
  58 {
  59         struct cdrom_info *cd = NULL;
  60
  61         mutex_lock(&idecd_ref_mutex);
  62         cd = ide_drv_g(disk, cdrom_info);
  63         if (cd) {
  64                 if (ide_device_get(cd->drive))
  65                         cd = NULL;
  66                 else
  67                         get_device(&cd->dev);
  68
  69         }
  70         mutex_unlock(&idecd_ref_mutex);
  71         return cd;
  72 }
  73
  74 static void ide_cd_put(struct cdrom_info *cd)
  75 {
  76         ide_drive_t *drive = cd->drive;
  77
  78         mutex_lock(&idecd_ref_mutex);
  79         put_device(&cd->dev);
  80         ide_device_put(drive);
  81         mutex_unlock(&idecd_ref_mutex);
  82 }
  83
  84 /*
  85  * Generic packet command support and error handling routines.
  86  */
  87
  88 /* Mark that we've seen a media change and invalidate our internal buffers. */
  89 static void cdrom_saw_media_change(ide_drive_t *drive)
  90 {
  91         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
  92         drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
  93 }
  94
  95 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
  96                            struct request_sense *sense)
  97 {
  98         int log = 0;
  99
 100         ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
 101
 102         if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
 103                 return 0;
 104
 105         switch (sense->sense_key) {
 106         case NO_SENSE:
 107         case RECOVERED_ERROR:
 108                 break;
 109         case NOT_READY:
 110                 /*
 111                  * don't care about tray state messages for e.g. capacity
 112                  * commands or in-progress or becoming ready
 113                  */
 114                 if (sense->asc == 0x3a || sense->asc == 0x04)
 115                         break;
 116                 log = 1;
 117                 break;
 118         case ILLEGAL_REQUEST:
 119                 /*
 120                  * don't log START_STOP unit with LoEj set, since we cannot
 121                  * reliably check if drive can auto-close
 122                  */
 123                 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
 124                         break;
 125                 log = 1;
 126                 break;
 127         case UNIT_ATTENTION:
 128                 /*
 129                  * Make good and sure we've seen this potential media change.
 130                  * Some drives (i.e. Creative) fail to present the correct sense
 131                  * key in the error register.
 132                  */
 133                 cdrom_saw_media_change(drive);
 134                 break;
 135         default:
 136                 log = 1;
 137                 break;
 138         }
 139         return log;
 140 }
 141
 142 static void cdrom_analyze_sense_data(ide_drive_t *drive,
 143                               struct request *failed_command,
 144                               struct request_sense *sense)
 145 {
 146         unsigned long sector;
 147         unsigned long bio_sectors;
 148         struct cdrom_info *info = drive->driver_data;
 149
 150         ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
 151                                      sense->error_code, sense->sense_key);
 152
 153         if (failed_command)
 154                 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
 155                                              failed_command->cmd[0]);
 156
 157         if (!cdrom_log_sense(drive, failed_command, sense))
 158                 return;
 159
 160         /*
 161          * If a read toc is executed for a CD-R or CD-RW medium where the first
 162          * toc has not been recorded yet, it will fail with 05/24/00 (which is a
 163          * confusing error)
 164          */
 165         if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
 166                 if (sense->sense_key == 0x05 && sense->asc == 0x24)
 167                         return;
 168
 169         /* current error */
 170         if (sense->error_code == 0x70) {
 171                 switch (sense->sense_key) {
 172                 case MEDIUM_ERROR:
 173                 case VOLUME_OVERFLOW:
 174                 case ILLEGAL_REQUEST:
 175                         if (!sense->valid)
 176                                 break;
 177                         if (failed_command == NULL ||
 178                                         !blk_fs_request(failed_command))
 179                                 break;
 180                         sector = (sense->information[0] << 24) |
 181                                  (sense->information[1] << 16) |
 182                                  (sense->information[2] <<  8) |
 183                                  (sense->information[3]);
 184
 185                         if (drive->queue->hardsect_size == 2048)
 186                                 /* device sector size is 2K */
 187                                 sector <<= 2;
 188
 189                         bio_sectors = max(bio_sectors(failed_command->bio), 4U);
 190                         sector &= ~(bio_sectors - 1);
 191
 192                         /*
 193                          * The SCSI specification allows for the value
 194                          * returned by READ CAPACITY to be up to 75 2K
 195                          * sectors past the last readable block.
 196                          * Therefore, if we hit a medium error within the
 197                          * last 75 2K sectors, we decrease the saved size
 198                          * value.
 199                          */
 200                         if (sector < get_capacity(info->disk) &&
 201                             drive->probed_capacity - sector < 4 * 75)
 202                                 set_capacity(info->disk, sector);
 203                 }
 204         }
 205
 206         ide_cd_log_error(drive->name, failed_command, sense);
 207 }
 208
 209 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
 210                                       struct request *failed_command)
 211 {
 212         struct cdrom_info *info         = drive->driver_data;
 213         struct request *rq              = &drive->request_sense_rq;
 214
 215         ide_debug_log(IDE_DBG_SENSE, "enter");
 216
 217         if (sense == NULL)
 218                 sense = &info->sense_data;
 219
 220         /* stuff the sense request in front of our current request */
 221         blk_rq_init(NULL, rq);
 222         rq->cmd_type = REQ_TYPE_ATA_PC;
 223         rq->rq_disk = info->disk;
 224
 225         rq->data = sense;
 226         rq->cmd[0] = GPCMD_REQUEST_SENSE;
 227         rq->cmd[4] = 18;
 228         rq->data_len = 18;
 229
 230         rq->cmd_type = REQ_TYPE_SENSE;
 231         rq->cmd_flags |= REQ_PREEMPT;
 232
 233         /* NOTE! Save the failed command in "rq->buffer" */
 234         rq->buffer = (void *) failed_command;
 235
 236         if (failed_command)
 237                 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x",
 238                                              failed_command->cmd[0]);
 239
 240         drive->hwif->rq = NULL;
 241
 242         elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0);
 243 }
 244
 245 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
 246 {
 247         struct request *rq = drive->hwif->rq;
 248         int nsectors = rq->hard_cur_sectors;
 249
 250         ide_debug_log(IDE_DBG_FUNC, "cmd: 0x%x, uptodate: 0x%x, nsectors: %d",
 251                                     rq->cmd[0], uptodate, nsectors);
 252
 253         if (blk_sense_request(rq) && uptodate) {
 254                 /*
 255                  * For REQ_TYPE_SENSE, "rq->buffer" points to the original
 256                  * failed request
 257                  */
 258                 struct request *failed = (struct request *) rq->buffer;
 259                 struct cdrom_info *info = drive->driver_data;
 260                 void *sense = &info->sense_data;
 261
 262                 if (failed) {
 263                         if (failed->sense) {
 264                                 sense = failed->sense;
 265                                 failed->sense_len = rq->sense_len;
 266                         }
 267                         cdrom_analyze_sense_data(drive, failed, sense);
 268
 269                         if (ide_end_rq(drive, failed, -EIO,
 270                                        blk_rq_bytes(failed)))
 271                                 BUG();
 272                 } else
 273                         cdrom_analyze_sense_data(drive, NULL, sense);
 274         }
 275
 276         if (!rq->current_nr_sectors && blk_fs_request(rq))
 277                 uptodate = 1;
 278         /* make sure it's fully ended */
 279         if (blk_pc_request(rq))
 280                 nsectors = (rq->data_len + 511) >> 9;
 281         if (!nsectors)
 282                 nsectors = 1;
 283
 284         ide_debug_log(IDE_DBG_FUNC, "uptodate: 0x%x, nsectors: %d",
 285                                     uptodate, nsectors);
 286
 287         if (blk_fs_request(rq) == 0 && uptodate <= 0 && rq->errors == 0)
 288                 rq->errors = -EIO;
 289
 290         ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
 291 }
 292
 293 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
 294 {
 295         if (st & 0x80)
 296                 return;
 297         ide_dump_status(drive, msg, st);
 298 }
 299
 300 /*
 301  * Returns:
 302  * 0: if the request should be continued.
 303  * 1: if the request was ended.
 304  */
 305 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
 306 {
 307         ide_hwif_t *hwif = drive->hwif;
 308         struct request *rq = hwif->rq;
 309         int stat, err, sense_key;
 310
 311         /* check for errors */
 312         stat = hwif->tp_ops->read_status(hwif);
 313
 314         if (stat_ret)
 315                 *stat_ret = stat;
 316
 317         if (OK_STAT(stat, good_stat, BAD_R_STAT))
 318                 return 0;
 319
 320         /* get the IDE error register */
 321         err = ide_read_error(drive);
 322         sense_key = err >> 4;
 323
 324         if (rq == NULL) {
 325                 printk(KERN_ERR PFX "%s: missing rq in %s\n",
 326                                 drive->name, __func__);
 327                 return 1;
 328         }
 329
 330         ide_debug_log(IDE_DBG_RQ, "stat: 0x%x, good_stat: 0x%x, cmd[0]: 0x%x, "
 331                                   "rq->cmd_type: 0x%x, err: 0x%x",
 332                                   stat, good_stat, rq->cmd[0], rq->cmd_type,
 333                                   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, "ireason: 0x%x, rw: 0x%x", ireason, rw);
 524
 525         /*
 526          * ireason == 0: the drive wants to receive data from us
 527          * ireason == 2: the drive is expecting to transfer data to us
 528          */
 529         if (ireason == (!rw << 1))
 530                 return 0;
 531         else if (ireason == (rw << 1)) {
 532
 533                 /* whoops... */
 534                 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
 535                                 drive->name, __func__);
 536
 537                 ide_pad_transfer(drive, rw, len);
 538         } else  if (rw == 0 && ireason == 1) {
 539                 /*
 540                  * Some drives (ASUS) seem to tell us that status info is
 541                  * available.  Just get it and ignore.
 542                  */
 543                 (void)hwif->tp_ops->read_status(hwif);
 544                 return 0;
 545         } else {
 546                 /* drive wants a command packet, or invalid ireason... */
 547                 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
 548                                 drive->name, __func__, ireason);
 549         }
 550
 551         if (rq->cmd_type == REQ_TYPE_ATA_PC)
 552                 rq->cmd_flags |= REQ_FAILED;
 553
 554         cdrom_end_request(drive, 0);
 555         return -1;
 556 }
 557
 558 /*
 559  * Assume that the drive will always provide data in multiples of at least
 560  * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
 561  */
 562 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
 563 {
 564         ide_debug_log(IDE_DBG_FUNC, "len: %d", len);
 565
 566         if ((len % SECTOR_SIZE) == 0)
 567                 return 0;
 568
 569         printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
 570                         __func__, len);
 571
 572         if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
 573                 printk(KERN_ERR PFX "This drive is not supported by this "
 574                                 "version of the driver\n");
 575         else {
 576                 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
 577                 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
 578         }
 579
 580         return 1;
 581 }
 582
 583 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
 584                                                  struct request *rq)
 585 {
 586         ide_debug_log(IDE_DBG_RQ, "rq->cmd_flags: 0x%x", rq->cmd_flags);
 587
 588         if (rq_data_dir(rq) == READ) {
 589                 unsigned short sectors_per_frame =
 590                         queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 591                 int nskip = rq->sector & (sectors_per_frame - 1);
 592
 593                 /*
 594                  * If the requested sector doesn't start on a frame boundary,
 595                  * we must adjust the start of the transfer so that it does,
 596                  * and remember to skip the first few sectors.
 597                  *
 598                  * If the rq->current_nr_sectors field is larger than the size
 599                  * of the buffer, it will mean that we're to skip a number of
 600                  * sectors equal to the amount by which rq->current_nr_sectors
 601                  * is larger than the buffer size.
 602                  */
 603                 if (nskip > 0) {
 604                         /* sanity check... */
 605                         if (rq->current_nr_sectors !=
 606                             bio_cur_sectors(rq->bio)) {
 607                                 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
 608                                                 drive->name, __func__,
 609                                                 rq->current_nr_sectors);
 610                                 cdrom_end_request(drive, 0);
 611                                 return ide_stopped;
 612                         }
 613                         rq->current_nr_sectors += nskip;
 614                 }
 615         }
 616
 617         /* set up the command */
 618         rq->timeout = ATAPI_WAIT_PC;
 619
 620         return ide_started;
 621 }
 622
 623 /*
 624  * Fix up a possibly partially-processed request so that we can start it over
 625  * entirely, or even put it back on the request queue.
 626  */
 627 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
 628 {
 629
 630         ide_debug_log(IDE_DBG_FUNC, "enter");
 631
 632         if (rq->buffer != bio_data(rq->bio)) {
 633                 sector_t n =
 634                         (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
 635
 636                 rq->buffer = bio_data(rq->bio);
 637                 rq->nr_sectors += n;
 638                 rq->sector -= n;
 639         }
 640         rq->current_nr_sectors = bio_cur_sectors(rq->bio);
 641         rq->hard_cur_sectors = rq->current_nr_sectors;
 642         rq->hard_nr_sectors = rq->nr_sectors;
 643         rq->hard_sector = rq->sector;
 644         rq->q->prep_rq_fn(rq->q, rq);
 645 }
 646
 647 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
 648 {
 649         ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
 650
 651         /*
 652          * Some of the trailing request sense fields are optional,
 653          * and some drives don't send them.  Sigh.
 654          */
 655         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 656             rq->data_len > 0 && rq->data_len <= 5)
 657                 while (rq->data_len > 0) {
 658                         *(u8 *)rq->data++ = 0;
 659                         --rq->data_len;
 660                 }
 661 }
 662
 663 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 664                     int write, void *buffer, unsigned *bufflen,
 665                     struct request_sense *sense, int timeout,
 666                     unsigned int cmd_flags)
 667 {
 668         struct cdrom_info *info = drive->driver_data;
 669         struct request_sense local_sense;
 670         int retries = 10;
 671         unsigned int flags = 0;
 672
 673         if (!sense)
 674                 sense = &local_sense;
 675
 676         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
 677                                   "cmd_flags: 0x%x",
 678                                   cmd[0], write, timeout, cmd_flags);
 679
 680         /* start of retry loop */
 681         do {
 682                 struct request *rq;
 683                 int error;
 684
 685                 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
 686
 687                 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
 688                 rq->cmd_type = REQ_TYPE_ATA_PC;
 689                 rq->sense = sense;
 690                 rq->cmd_flags |= cmd_flags;
 691                 rq->timeout = timeout;
 692                 if (buffer) {
 693                         rq->data = buffer;
 694                         rq->data_len = *bufflen;
 695                 }
 696
 697                 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 698
 699                 if (buffer)
 700                         *bufflen = rq->data_len;
 701
 702                 flags = rq->cmd_flags;
 703                 blk_put_request(rq);
 704
 705                 /*
 706                  * FIXME: we should probably abort/retry or something in case of
 707                  * failure.
 708                  */
 709                 if (flags & REQ_FAILED) {
 710                         /*
 711                          * The request failed.  Retry if it was due to a unit
 712                          * attention status (usually means media was changed).
 713                          */
 714                         struct request_sense *reqbuf = sense;
 715
 716                         if (reqbuf->sense_key == UNIT_ATTENTION)
 717                                 cdrom_saw_media_change(drive);
 718                         else if (reqbuf->sense_key == NOT_READY &&
 719                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 720                                 /*
 721                                  * The drive is in the process of loading
 722                                  * a disk.  Retry, but wait a little to give
 723                                  * the drive time to complete the load.
 724                                  */
 725                                 ssleep(2);
 726                         } else {
 727                                 /* otherwise, don't retry */
 728                                 retries = 0;
 729                         }
 730                         --retries;
 731                 }
 732
 733                 /* end of retry loop */
 734         } while ((flags & REQ_FAILED) && retries >= 0);
 735
 736         /* return an error if the command failed */
 737         return (flags & REQ_FAILED) ? -EIO : 0;
 738 }
 739
 740 /*
 741  * Called from blk_end_request_callback() after the data of the request is
 742  * completed and before the request itself is completed. By returning value '1',
 743  * blk_end_request_callback() returns immediately without completing it.
 744  */
 745 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
 746 {
 747         return 1;
 748 }
 749
 750 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 751 {
 752         ide_hwif_t *hwif = drive->hwif;
 753         struct request *rq = hwif->rq;
 754         xfer_func_t *xferfunc;
 755         ide_expiry_t *expiry = NULL;
 756         int dma_error = 0, dma, stat, thislen, uptodate = 0;
 757         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
 758         unsigned int timeout;
 759         u16 len;
 760         u8 ireason;
 761
 762         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x",
 763                                   rq->cmd[0], write);
 764
 765         /* check for errors */
 766         dma = drive->dma;
 767         if (dma) {
 768                 drive->dma = 0;
 769                 dma_error = hwif->dma_ops->dma_end(drive);
 770                 if (dma_error) {
 771                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 772                                         write ? "write" : "read");
 773                         ide_dma_off(drive);
 774                 }
 775         }
 776
 777         if (cdrom_decode_status(drive, 0, &stat))
 778                 return ide_stopped;
 779
 780         /* using dma, transfer is complete now */
 781         if (dma) {
 782                 if (dma_error)
 783                         return ide_error(drive, "dma error", stat);
 784                 if (blk_fs_request(rq)) {
 785                         ide_complete_rq(drive, 0, rq->nr_sectors
 786                                 ? (rq->nr_sectors << 9) : ide_rq_bytes(rq));
 787                         return ide_stopped;
 788                 } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) {
 789                         ide_complete_rq(drive, 0, 512);
 790                         return ide_stopped;
 791                 }
 792                 goto end_request;
 793         }
 794
 795         ide_read_bcount_and_ireason(drive, &len, &ireason);
 796
 797         thislen = blk_fs_request(rq) ? len : rq->data_len;
 798         if (thislen > len)
 799                 thislen = len;
 800
 801         ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
 802                                   stat, thislen);
 803
 804         /* If DRQ is clear, the command has completed. */
 805         if ((stat & ATA_DRQ) == 0) {
 806                 if (blk_fs_request(rq)) {
 807                         /*
 808                          * If we're not done reading/writing, complain.
 809                          * Otherwise, complete the command normally.
 810                          */
 811                         uptodate = 1;
 812                         if (rq->current_nr_sectors > 0) {
 813                                 printk(KERN_ERR PFX "%s: %s: data underrun "
 814                                                 "(%d blocks)\n",
 815                                                 drive->name, __func__,
 816                                                 rq->current_nr_sectors);
 817                                 if (!write)
 818                                         rq->cmd_flags |= REQ_FAILED;
 819                                 uptodate = 0;
 820                         }
 821                         cdrom_end_request(drive, uptodate);
 822                         return ide_stopped;
 823                 } else if (!blk_pc_request(rq)) {
 824                         ide_cd_request_sense_fixup(drive, rq);
 825                         /* complain if we still have data left to transfer */
 826                         uptodate = rq->data_len ? 0 : 1;
 827                 }
 828                 goto end_request;
 829         }
 830
 831         /* check which way to transfer data */
 832         if (ide_cd_check_ireason(drive, rq, len, ireason, write))
 833                 return ide_stopped;
 834
 835         if (blk_fs_request(rq)) {
 836                 if (write == 0) {
 837                         int nskip;
 838
 839                         if (ide_cd_check_transfer_size(drive, len)) {
 840                                 cdrom_end_request(drive, 0);
 841                                 return ide_stopped;
 842                         }
 843
 844                         /*
 845                          * First, figure out if we need to bit-bucket
 846                          * any of the leading sectors.
 847                          */
 848                         nskip = min_t(int, rq->current_nr_sectors
 849                                            - bio_cur_sectors(rq->bio),
 850                                            thislen >> 9);
 851                         if (nskip > 0) {
 852                                 ide_pad_transfer(drive, write, nskip << 9);
 853                                 rq->current_nr_sectors -= nskip;
 854                                 thislen -= (nskip << 9);
 855                         }
 856                 }
 857         }
 858
 859         if (ireason == 0) {
 860                 write = 1;
 861                 xferfunc = hwif->tp_ops->output_data;
 862         } else {
 863                 write = 0;
 864                 xferfunc = hwif->tp_ops->input_data;
 865         }
 866
 867         ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
 868                                   "ireason: 0x%x",
 869                                   rq->cmd_type, ireason);
 870
 871         /* transfer data */
 872         while (thislen > 0) {
 873                 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
 874                 int blen = rq->data_len;
 875
 876                 /* bio backed? */
 877                 if (rq->bio) {
 878                         if (blk_fs_request(rq)) {
 879                                 ptr = rq->buffer;
 880                                 blen = rq->current_nr_sectors << 9;
 881                         } else {
 882                                 ptr = bio_data(rq->bio);
 883                                 blen = bio_iovec(rq->bio)->bv_len;
 884                         }
 885                 }
 886
 887                 if (!ptr) {
 888                         if (blk_fs_request(rq) && !write)
 889                                 /*
 890                                  * If the buffers are full, pipe the rest into
 891                                  * oblivion.
 892                                  */
 893                                 ide_pad_transfer(drive, 0, thislen);
 894                         else {
 895                                 printk(KERN_ERR PFX "%s: confused, missing data\n",
 896                                                 drive->name);
 897                                 blk_dump_rq_flags(rq, rq_data_dir(rq)
 898                                                   ? "cdrom_newpc_intr, write"
 899                                                   : "cdrom_newpc_intr, read");
 900                         }
 901                         break;
 902                 }
 903
 904                 if (blen > thislen)
 905                         blen = thislen;
 906
 907                 xferfunc(drive, NULL, ptr, blen);
 908
 909                 thislen -= blen;
 910                 len -= blen;
 911
 912                 if (blk_fs_request(rq)) {
 913                         rq->buffer += blen;
 914                         rq->nr_sectors -= (blen >> 9);
 915                         rq->current_nr_sectors -= (blen >> 9);
 916                         rq->sector += (blen >> 9);
 917
 918                         if (rq->current_nr_sectors == 0 && rq->nr_sectors)
 919                                 cdrom_end_request(drive, 1);
 920                 } else {
 921                         rq->data_len -= blen;
 922
 923                         /*
 924                          * The request can't be completed until DRQ is cleared.
 925                          * So complete the data, but don't complete the request
 926                          * using the dummy function for the callback feature
 927                          * of blk_end_request_callback().
 928                          */
 929                         if (rq->bio)
 930                                 blk_end_request_callback(rq, 0, blen,
 931                                                  cdrom_newpc_intr_dummy_cb);
 932                         else
 933                                 rq->data += blen;
 934                 }
 935                 if (!write && blk_sense_request(rq))
 936                         rq->sense_len += blen;
 937         }
 938
 939         /* pad, if necessary */
 940         if (!blk_fs_request(rq) && len > 0)
 941                 ide_pad_transfer(drive, write, len);
 942
 943         if (blk_pc_request(rq)) {
 944                 timeout = rq->timeout;
 945         } else {
 946                 timeout = ATAPI_WAIT_PC;
 947                 if (!blk_fs_request(rq))
 948                         expiry = ide_cd_expiry;
 949         }
 950
 951         hwif->expiry = expiry;
 952         ide_set_handler(drive, cdrom_newpc_intr, timeout);
 953         return ide_started;
 954
 955 end_request:
 956         if (blk_pc_request(rq)) {
 957                 unsigned int dlen = rq->data_len;
 958
 959                 if (dma)
 960                         rq->data_len = 0;
 961
 962                 if (blk_end_request(rq, 0, dlen))
 963                         BUG();
 964
 965                 hwif->rq = NULL;
 966         } else {
 967                 if (!uptodate)
 968                         rq->cmd_flags |= REQ_FAILED;
 969                 cdrom_end_request(drive, uptodate);
 970         }
 971         return ide_stopped;
 972 }
 973
 974 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 975 {
 976         struct cdrom_info *cd = drive->driver_data;
 977         int write = rq_data_dir(rq) == WRITE;
 978         unsigned short sectors_per_frame =
 979                 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 980
 981         ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, write: 0x%x, "
 982                                   "secs_per_frame: %u",
 983                                   rq->cmd[0], write, sectors_per_frame);
 984
 985         if (write) {
 986                 /* disk has become write protected */
 987                 if (get_disk_ro(cd->disk)) {
 988                         cdrom_end_request(drive, 0);
 989                         return ide_stopped;
 990                 }
 991         } else {
 992                 /*
 993                  * We may be retrying this request after an error.  Fix up any
 994                  * weirdness which might be present in the request packet.
 995                  */
 996                 ide_cd_restore_request(drive, rq);
 997         }
 998
 999         /* use DMA, if possible / writes *must* be hardware frame aligned */
1000         if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1001             (rq->sector & (sectors_per_frame - 1))) {
1002                 if (write) {
1003                         cdrom_end_request(drive, 0);
1004                         return ide_stopped;
1005                 }
1006                 drive->dma = 0;
1007         } else
1008                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1009
1010         if (write)
1011                 cd->devinfo.media_written = 1;
1012
1013         return ide_started;
1014 }
1015
1016 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1017 {
1018
1019         ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
1020                                   rq->cmd[0], rq->cmd_type);
1021
1022         if (blk_pc_request(rq))
1023                 rq->cmd_flags |= REQ_QUIET;
1024         else
1025                 rq->cmd_flags &= ~REQ_FAILED;
1026
1027         drive->dma = 0;
1028
1029         /* sg request */
1030         if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1031                 struct request_queue *q = drive->queue;
1032                 unsigned int alignment;
1033                 char *buf;
1034
1035                 if (rq->bio)
1036                         buf = bio_data(rq->bio);
1037                 else
1038                         buf = rq->data;
1039
1040                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1041
1042                 /*
1043                  * check if dma is safe
1044                  *
1045                  * NOTE! The "len" and "addr" checks should possibly have
1046                  * separate masks.
1047                  */
1048                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1049                 if ((unsigned long)buf & alignment
1050                     || rq->data_len & q->dma_pad_mask
1051                     || object_is_on_stack(buf))
1052                         drive->dma = 0;
1053         }
1054 }
1055
1056 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1057                                         sector_t block)
1058 {
1059         struct ide_cmd cmd;
1060
1061         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
1062                                   rq->cmd[0], (unsigned long long)block);
1063
1064         if (drive->debug_mask & IDE_DBG_RQ)
1065                 blk_dump_rq_flags(rq, "ide_cd_do_request");
1066
1067         if (blk_fs_request(rq)) {
1068                 if (cdrom_start_rw(drive, rq) == ide_stopped)
1069                         return ide_stopped;
1070
1071                 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1072                         return ide_stopped;
1073         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1074                    rq->cmd_type == REQ_TYPE_ATA_PC) {
1075                 if (!rq->timeout)
1076                         rq->timeout = ATAPI_WAIT_PC;
1077
1078                 cdrom_do_block_pc(drive, rq);
1079         } else if (blk_special_request(rq)) {
1080                 /* right now this can only be a reset... */
1081                 cdrom_end_request(drive, 1);
1082                 return ide_stopped;
1083         } else {
1084                 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1085                 cdrom_end_request(drive, 0);
1086                 return ide_stopped;
1087         }
1088
1089         memset(&cmd, 0, sizeof(cmd));
1090
1091         if (rq_data_dir(rq))
1092                 cmd.tf_flags |= IDE_TFLAG_WRITE;
1093
1094         cmd.rq = rq;
1095
1096         return ide_issue_pc(drive, &cmd);
1097 }
1098
1099 /*
1100  * Ioctl handling.
1101  *
1102  * Routines which queue packet commands take as a final argument a pointer to a
1103  * request_sense struct. If execution of the command results in an error with a
1104  * CHECK CONDITION status, this structure will be filled with the results of the
1105  * subsequent request sense command. The pointer can also be NULL, in which case
1106  * no sense information is returned.
1107  */
1108 static void msf_from_bcd(struct atapi_msf *msf)
1109 {
1110         msf->minute = bcd2bin(msf->minute);
1111         msf->second = bcd2bin(msf->second);
1112         msf->frame  = bcd2bin(msf->frame);
1113 }
1114
1115 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1116 {
1117         struct cdrom_info *info = drive->driver_data;
1118         struct cdrom_device_info *cdi = &info->devinfo;
1119         unsigned char cmd[BLK_MAX_CDB];
1120
1121         ide_debug_log(IDE_DBG_FUNC, "enter");
1122
1123         memset(cmd, 0, BLK_MAX_CDB);
1124         cmd[0] = GPCMD_TEST_UNIT_READY;
1125
1126         /*
1127          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1128          * instead of supporting the LOAD_UNLOAD opcode.
1129          */
1130         cmd[7] = cdi->sanyo_slot % 3;
1131
1132         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1133 }
1134
1135 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1136                                unsigned long *sectors_per_frame,
1137                                struct request_sense *sense)
1138 {
1139         struct {
1140                 __be32 lba;
1141                 __be32 blocklen;
1142         } capbuf;
1143
1144         int stat;
1145         unsigned char cmd[BLK_MAX_CDB];
1146         unsigned len = sizeof(capbuf);
1147         u32 blocklen;
1148
1149         ide_debug_log(IDE_DBG_FUNC, "enter");
1150
1151         memset(cmd, 0, BLK_MAX_CDB);
1152         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1153
1154         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1155                                REQ_QUIET);
1156         if (stat)
1157                 return stat;
1158
1159         /*
1160          * Sanity check the given block size
1161          */
1162         blocklen = be32_to_cpu(capbuf.blocklen);
1163         switch (blocklen) {
1164         case 512:
1165         case 1024:
1166         case 2048:
1167         case 4096:
1168                 break;
1169         default:
1170                 printk(KERN_ERR PFX "%s: weird block size %u\n",
1171                                 drive->name, blocklen);
1172                 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1173                                 drive->name);
1174                 blocklen = 2048;
1175                 break;
1176         }
1177
1178         *capacity = 1 + be32_to_cpu(capbuf.lba);
1179         *sectors_per_frame = blocklen >> SECTOR_BITS;
1180
1181         ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
1182                                      *capacity, *sectors_per_frame);
1183
1184         return 0;
1185 }
1186
1187 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1188                                 int format, char *buf, int buflen,
1189                                 struct request_sense *sense)
1190 {
1191         unsigned char cmd[BLK_MAX_CDB];
1192
1193         ide_debug_log(IDE_DBG_FUNC, "enter");
1194
1195         memset(cmd, 0, BLK_MAX_CDB);
1196
1197         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1198         cmd[6] = trackno;
1199         cmd[7] = (buflen >> 8);
1200         cmd[8] = (buflen & 0xff);
1201         cmd[9] = (format << 6);
1202
1203         if (msf_flag)
1204                 cmd[1] = 2;
1205
1206         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1207 }
1208
1209 /* Try to read the entire TOC for the disk into our internal buffer. */
1210 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1211 {
1212         int stat, ntracks, i;
1213         struct cdrom_info *info = drive->driver_data;
1214         struct cdrom_device_info *cdi = &info->devinfo;
1215         struct atapi_toc *toc = info->toc;
1216         struct {
1217                 struct atapi_toc_header hdr;
1218                 struct atapi_toc_entry  ent;
1219         } ms_tmp;
1220         long last_written;
1221         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1222
1223         ide_debug_log(IDE_DBG_FUNC, "enter");
1224
1225         if (toc == NULL) {
1226                 /* try to allocate space */
1227                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1228                 if (toc == NULL) {
1229                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1230                                         drive->name);
1231                         return -ENOMEM;
1232                 }
1233                 info->toc = toc;
1234         }
1235
1236         /*
1237          * Check to see if the existing data is still valid. If it is,
1238          * just return.
1239          */
1240         (void) cdrom_check_status(drive, sense);
1241
1242         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1243                 return 0;
1244
1245         /* try to get the total cdrom capacity and sector size */
1246         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1247                                    sense);
1248         if (stat)
1249                 toc->capacity = 0x1fffff;
1250
1251         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1252         /* save a private copy of the TOC capacity for error handling */
1253         drive->probed_capacity = toc->capacity * sectors_per_frame;
1254
1255         blk_queue_hardsect_size(drive->queue,
1256                                 sectors_per_frame << SECTOR_BITS);
1257
1258         /* first read just the header, so we know how long the TOC is */
1259         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1260                                     sizeof(struct atapi_toc_header), sense);
1261         if (stat)
1262                 return stat;
1263
1264         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1265                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1266                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1267         }
1268
1269         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1270         if (ntracks <= 0)
1271                 return -EIO;
1272         if (ntracks > MAX_TRACKS)
1273                 ntracks = MAX_TRACKS;
1274
1275         /* now read the whole schmeer */
1276         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1277                                   (char *)&toc->hdr,
1278                                    sizeof(struct atapi_toc_header) +
1279                                    (ntracks + 1) *
1280                                    sizeof(struct atapi_toc_entry), sense);
1281
1282         if (stat && toc->hdr.first_track > 1) {
1283                 /*
1284                  * Cds with CDI tracks only don't have any TOC entries, despite
1285                  * of this the returned values are
1286                  * first_track == last_track = number of CDI tracks + 1,
1287                  * so that this case is indistinguishable from the same layout
1288                  * plus an additional audio track. If we get an error for the
1289                  * regular case, we assume a CDI without additional audio
1290                  * tracks. In this case the readable TOC is empty (CDI tracks
1291                  * are not included) and only holds the Leadout entry.
1292                  *
1293                  * Heiko Eißfeldt.
1294                  */
1295                 ntracks = 0;
1296                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1297                                            (char *)&toc->hdr,
1298                                            sizeof(struct atapi_toc_header) +
1299                                            (ntracks + 1) *
1300                                            sizeof(struct atapi_toc_entry),
1301                                            sense);
1302                 if (stat)
1303                         return stat;
1304
1305                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1306                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1307                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1308                 } else {
1309                         toc->hdr.first_track = CDROM_LEADOUT;
1310                         toc->hdr.last_track = CDROM_LEADOUT;
1311                 }
1312         }
1313
1314         if (stat)
1315                 return stat;
1316
1317         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1318
1319         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1320                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1321                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1322         }
1323
1324         for (i = 0; i <= ntracks; i++) {
1325                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1326                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1327                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1328                         msf_from_bcd(&toc->ent[i].addr.msf);
1329                 }
1330                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1331                                                   toc->ent[i].addr.msf.second,
1332                                                   toc->ent[i].addr.msf.frame);
1333         }
1334
1335         if (toc->hdr.first_track != CDROM_LEADOUT) {
1336                 /* read the multisession information */
1337                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1338                                            sizeof(ms_tmp), sense);
1339                 if (stat)
1340                         return stat;
1341
1342                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1343         } else {
1344                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1345                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1346                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1347         }
1348
1349         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1350                 /* re-read multisession information using MSF format */
1351                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1352                                            sizeof(ms_tmp), sense);
1353                 if (stat)
1354                         return stat;
1355
1356                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1357                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1358                                                    ms_tmp.ent.addr.msf.second,
1359                                                    ms_tmp.ent.addr.msf.frame);
1360         }
1361
1362         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1363
1364         /* now try to get the total cdrom capacity */
1365         stat = cdrom_get_last_written(cdi, &last_written);
1366         if (!stat && (last_written > toc->capacity)) {
1367                 toc->capacity = last_written;
1368                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1369                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1370         }
1371
1372         /* Remember that we've read this stuff. */
1373         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1374
1375         return 0;
1376 }
1377
1378 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1379 {
1380         struct cdrom_info *info = drive->driver_data;
1381         struct cdrom_device_info *cdi = &info->devinfo;
1382         struct packet_command cgc;
1383         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1384
1385         ide_debug_log(IDE_DBG_FUNC, "enter");
1386
1387         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1388                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1389
1390         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1391         do {
1392                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1393                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1394                 if (!stat)
1395                         break;
1396         } while (--attempts);
1397         return stat;
1398 }
1399
1400 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1401 {
1402         struct cdrom_info *cd = drive->driver_data;
1403         u16 curspeed, maxspeed;
1404
1405         ide_debug_log(IDE_DBG_FUNC, "enter");
1406
1407         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1408                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1409                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1410         } else {
1411                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1412                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1413         }
1414
1415         ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1416                                      curspeed, maxspeed);
1417
1418         cd->current_speed = (curspeed + (176/2)) / 176;
1419         cd->max_speed = (maxspeed + (176/2)) / 176;
1420 }
1421
1422 #define IDE_CD_CAPABILITIES \
1423         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1424          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1425          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1426          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1427          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1428
1429 static struct cdrom_device_ops ide_cdrom_dops = {
1430         .open                   = ide_cdrom_open_real,
1431         .release                = ide_cdrom_release_real,
1432         .drive_status           = ide_cdrom_drive_status,
1433         .media_changed          = ide_cdrom_check_media_change_real,
1434         .tray_move              = ide_cdrom_tray_move,
1435         .lock_door              = ide_cdrom_lock_door,
1436         .select_speed           = ide_cdrom_select_speed,
1437         .get_last_session       = ide_cdrom_get_last_session,
1438         .get_mcn                = ide_cdrom_get_mcn,
1439         .reset                  = ide_cdrom_reset,
1440         .audio_ioctl            = ide_cdrom_audio_ioctl,
1441         .capability             = IDE_CD_CAPABILITIES,
1442         .generic_packet         = ide_cdrom_packet,
1443 };
1444
1445 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1446 {
1447         struct cdrom_info *info = drive->driver_data;
1448         struct cdrom_device_info *devinfo = &info->devinfo;
1449
1450         ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1451
1452         devinfo->ops = &ide_cdrom_dops;
1453         devinfo->speed = info->current_speed;
1454         devinfo->capacity = nslots;
1455         devinfo->handle = drive;
1456         strcpy(devinfo->name, drive->name);
1457
1458         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1459                 devinfo->mask |= CDC_SELECT_SPEED;
1460
1461         devinfo->disk = info->disk;
1462         return register_cdrom(devinfo);
1463 }
1464
1465 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1466 {
1467         struct cdrom_info *cd = drive->driver_data;
1468         struct cdrom_device_info *cdi = &cd->devinfo;
1469         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1470         mechtype_t mechtype;
1471         int nslots = 1;
1472
1473         ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1474                                      drive->media, drive->atapi_flags);
1475
1476         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1477                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1478                      CDC_MO_DRIVE | CDC_RAM);
1479
1480         if (drive->media == ide_optical) {
1481                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1482                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1483                                 drive->name);
1484                 return nslots;
1485         }
1486
1487         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1488                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1489                 cdi->mask &= ~CDC_PLAY_AUDIO;
1490                 return nslots;
1491         }
1492
1493         /*
1494          * We have to cheat a little here. the packet will eventually be queued
1495          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1496          * Since this device hasn't been registered with the Uniform layer yet,
1497          * it can't do this. Same goes for cdi->ops.
1498          */
1499         cdi->handle = drive;
1500         cdi->ops = &ide_cdrom_dops;
1501
1502         if (ide_cdrom_get_capabilities(drive, buf))
1503                 return 0;
1504
1505         if ((buf[8 + 6] & 0x01) == 0)
1506                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1507         if (buf[8 + 6] & 0x08)
1508                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1509         if (buf[8 + 3] & 0x01)
1510                 cdi->mask &= ~CDC_CD_R;
1511         if (buf[8 + 3] & 0x02)
1512                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1513         if (buf[8 + 2] & 0x38)
1514                 cdi->mask &= ~CDC_DVD;
1515         if (buf[8 + 3] & 0x20)
1516                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1517         if (buf[8 + 3] & 0x10)
1518                 cdi->mask &= ~CDC_DVD_R;
1519         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1520                 cdi->mask &= ~CDC_PLAY_AUDIO;
1521
1522         mechtype = buf[8 + 6] >> 5;
1523         if (mechtype == mechtype_caddy ||
1524             mechtype == mechtype_popup ||
1525             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1526                 cdi->mask |= CDC_CLOSE_TRAY;
1527
1528         if (cdi->sanyo_slot > 0) {
1529                 cdi->mask &= ~CDC_SELECT_DISC;
1530                 nslots = 3;
1531         } else if (mechtype == mechtype_individual_changer ||
1532                    mechtype == mechtype_cartridge_changer) {
1533                 nslots = cdrom_number_of_slots(cdi);
1534                 if (nslots > 1)
1535                         cdi->mask &= ~CDC_SELECT_DISC;
1536         }
1537
1538         ide_cdrom_update_speed(drive, buf);
1539
1540         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1541
1542         /* don't print speed if the drive reported 0 */
1543         if (cd->max_speed)
1544                 printk(KERN_CONT " %dX", cd->max_speed);
1545
1546         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1547
1548         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1549                 printk(KERN_CONT " DVD%s%s",
1550                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1551                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1552
1553         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1554                 printk(KERN_CONT " CD%s%s",
1555                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1556                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1557
1558         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1559                 printk(KERN_CONT " changer w/%d slots", nslots);
1560         else
1561                 printk(KERN_CONT " drive");
1562
1563         printk(KERN_CONT ", %dkB Cache\n",
1564                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1565
1566         return nslots;
1567 }
1568
1569 /* standard prep_rq_fn that builds 10 byte cmds */
1570 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1571 {
1572         int hard_sect = queue_hardsect_size(q);
1573         long block = (long)rq->hard_sector / (hard_sect >> 9);
1574         unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1575
1576         memset(rq->cmd, 0, BLK_MAX_CDB);
1577
1578         if (rq_data_dir(rq) == READ)
1579                 rq->cmd[0] = GPCMD_READ_10;
1580         else
1581                 rq->cmd[0] = GPCMD_WRITE_10;
1582
1583         /*
1584          * fill in lba
1585          */
1586         rq->cmd[2] = (block >> 24) & 0xff;
1587         rq->cmd[3] = (block >> 16) & 0xff;
1588         rq->cmd[4] = (block >>  8) & 0xff;
1589         rq->cmd[5] = block & 0xff;
1590
1591         /*
1592          * and transfer length
1593          */
1594         rq->cmd[7] = (blocks >> 8) & 0xff;
1595         rq->cmd[8] = blocks & 0xff;
1596         rq->cmd_len = 10;
1597         return BLKPREP_OK;
1598 }
1599
1600 /*
1601  * Most of the SCSI commands are supported directly by ATAPI devices.
1602  * This transform handles the few exceptions.
1603  */
1604 static int ide_cdrom_prep_pc(struct request *rq)
1605 {
1606         u8 *c = rq->cmd;
1607
1608         /* transform 6-byte read/write commands to the 10-byte version */
1609         if (c[0] == READ_6 || c[0] == WRITE_6) {
1610                 c[8] = c[4];
1611                 c[5] = c[3];
1612                 c[4] = c[2];
1613                 c[3] = c[1] & 0x1f;
1614                 c[2] = 0;
1615                 c[1] &= 0xe0;
1616                 c[0] += (READ_10 - READ_6);
1617                 rq->cmd_len = 10;
1618                 return BLKPREP_OK;
1619         }
1620
1621         /*
1622          * it's silly to pretend we understand 6-byte sense commands, just
1623          * reject with ILLEGAL_REQUEST and the caller should take the
1624          * appropriate action
1625          */
1626         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1627                 rq->errors = ILLEGAL_REQUEST;
1628                 return BLKPREP_KILL;
1629         }
1630
1631         return BLKPREP_OK;
1632 }
1633
1634 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1635 {
1636         if (blk_fs_request(rq))
1637                 return ide_cdrom_prep_fs(q, rq);
1638         else if (blk_pc_request(rq))
1639                 return ide_cdrom_prep_pc(rq);
1640
1641         return 0;
1642 }
1643
1644 struct cd_list_entry {
1645         const char      *id_model;
1646         const char      *id_firmware;
1647         unsigned int    cd_flags;
1648 };
1649
1650 #ifdef CONFIG_IDE_PROC_FS
1651 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1652 {
1653         unsigned long capacity, sectors_per_frame;
1654
1655         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1656                 return 0;
1657
1658         return capacity * sectors_per_frame;
1659 }
1660
1661 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1662                                         int count, int *eof, void *data)
1663 {
1664         ide_drive_t *drive = data;
1665         int len;
1666
1667         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1668         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1669 }
1670
1671 static ide_proc_entry_t idecd_proc[] = {
1672         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1673         { NULL, 0, NULL, NULL }
1674 };
1675
1676 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1677 {
1678         return idecd_proc;
1679 }
1680
1681 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1682 {
1683         return NULL;
1684 }
1685 #endif
1686
1687 static const struct cd_list_entry ide_cd_quirks_list[] = {
1688         /* Limit transfer size per interrupt. */
1689         { "SAMSUNG CD-ROM SCR-2430", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1690         { "SAMSUNG CD-ROM SCR-2432", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1691         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1692         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1693         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1694         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1695                                              IDE_AFLAG_PRE_ATAPI12,          },
1696         /* Vertos 300, some versions of this drive like to talk BCD. */
1697         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1698         /* Vertos 600 ESD. */
1699         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1700         /*
1701          * Sanyo 3 CD changer uses a non-standard command for CD changing
1702          * (by default standard ATAPI support for CD changers is used).
1703          */
1704         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1705         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1706         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1707         /* Stingray 8X CD-ROM. */
1708         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1709         /*
1710          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1711          * mode sense page capabilities size, but older drives break.
1712          */
1713         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1714         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1715         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1716         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1717         /*
1718          * Some drives used by Apple don't advertise audio play
1719          * but they do support reading TOC & audio datas.
1720          */
1721         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1722         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1723         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1724         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1725         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1726         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1727         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1728         { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1729         { NULL, NULL, 0 }
1730 };
1731
1732 static unsigned int ide_cd_flags(u16 *id)
1733 {
1734         const struct cd_list_entry *cle = ide_cd_quirks_list;
1735
1736         while (cle->id_model) {
1737                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1738                     (cle->id_firmware == NULL ||
1739                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1740                         return cle->cd_flags;
1741                 cle++;
1742         }
1743
1744         return 0;
1745 }
1746
1747 static int ide_cdrom_setup(ide_drive_t *drive)
1748 {
1749         struct cdrom_info *cd = drive->driver_data;
1750         struct cdrom_device_info *cdi = &cd->devinfo;
1751         u16 *id = drive->id;
1752         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1753         int nslots;
1754
1755         ide_debug_log(IDE_DBG_PROBE, "enter");
1756
1757         blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1758         blk_queue_dma_alignment(drive->queue, 31);
1759         blk_queue_update_dma_pad(drive->queue, 15);
1760         drive->queue->unplug_delay = (1 * HZ) / 1000;
1761         if (!drive->queue->unplug_delay)
1762                 drive->queue->unplug_delay = 1;
1763
1764         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1765         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1766
1767         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1768             fw_rev[4] == '1' && fw_rev[6] <= '2')
1769                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1770                                      IDE_AFLAG_TOCADDR_AS_BCD);
1771         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1772                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1773                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1774         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1775                 /* 3 => use CD in slot 0 */
1776                 cdi->sanyo_slot = 3;
1777
1778         nslots = ide_cdrom_probe_capabilities(drive);
1779
1780         /* set correct block size */
1781         blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1782
1783         if (ide_cdrom_register(drive, nslots)) {
1784                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1785                                 " cdrom driver.\n", drive->name, __func__);
1786                 cd->devinfo.handle = NULL;
1787                 return 1;
1788         }
1789
1790         ide_proc_register_driver(drive, cd->driver);
1791         return 0;
1792 }
1793
1794 static void ide_cd_remove(ide_drive_t *drive)
1795 {
1796         struct cdrom_info *info = drive->driver_data;
1797
1798         ide_debug_log(IDE_DBG_FUNC, "enter");
1799
1800         ide_proc_unregister_driver(drive, info->driver);
1801         device_del(&info->dev);
1802         del_gendisk(info->disk);
1803
1804         mutex_lock(&idecd_ref_mutex);
1805         put_device(&info->dev);
1806         mutex_unlock(&idecd_ref_mutex);
1807 }
1808
1809 static void ide_cd_release(struct device *dev)
1810 {
1811         struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1812         struct cdrom_device_info *devinfo = &info->devinfo;
1813         ide_drive_t *drive = info->drive;
1814         struct gendisk *g = info->disk;
1815
1816         ide_debug_log(IDE_DBG_FUNC, "enter");
1817
1818         kfree(info->toc);
1819         if (devinfo->handle == drive)
1820                 unregister_cdrom(devinfo);
1821         drive->driver_data = NULL;
1822         blk_queue_prep_rq(drive->queue, NULL);
1823         g->private_data = NULL;
1824         put_disk(g);
1825         kfree(info);
1826 }
1827
1828 static int ide_cd_probe(ide_drive_t *);
1829
1830 static struct ide_driver ide_cdrom_driver = {
1831         .gen_driver = {
1832                 .owner          = THIS_MODULE,
1833                 .name           = "ide-cdrom",
1834                 .bus            = &ide_bus_type,
1835         },
1836         .probe                  = ide_cd_probe,
1837         .remove                 = ide_cd_remove,
1838         .version                = IDECD_VERSION,
1839         .do_request             = ide_cd_do_request,
1840 #ifdef CONFIG_IDE_PROC_FS
1841         .proc_entries           = ide_cd_proc_entries,
1842         .proc_devsets           = ide_cd_proc_devsets,
1843 #endif
1844 };
1845
1846 static int idecd_open(struct block_device *bdev, fmode_t mode)
1847 {
1848         struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1849         int rc = -ENOMEM;
1850
1851         if (!info)
1852                 return -ENXIO;
1853
1854         rc = cdrom_open(&info->devinfo, bdev, mode);
1855
1856         if (rc < 0)
1857                 ide_cd_put(info);
1858
1859         return rc;
1860 }
1861
1862 static int idecd_release(struct gendisk *disk, fmode_t mode)
1863 {
1864         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1865
1866         cdrom_release(&info->devinfo, mode);
1867
1868         ide_cd_put(info);
1869
1870         return 0;
1871 }
1872
1873 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1874 {
1875         struct packet_command cgc;
1876         char buffer[16];
1877         int stat;
1878         char spindown;
1879
1880         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1881                 return -EFAULT;
1882
1883         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1884
1885         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1886         if (stat)
1887                 return stat;
1888
1889         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1890         return cdrom_mode_select(cdi, &cgc);
1891 }
1892
1893 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1894 {
1895         struct packet_command cgc;
1896         char buffer[16];
1897         int stat;
1898         char spindown;
1899
1900         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1901
1902         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1903         if (stat)
1904                 return stat;
1905
1906         spindown = buffer[11] & 0x0f;
1907         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1908                 return -EFAULT;
1909         return 0;
1910 }
1911
1912 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1913                         unsigned int cmd, unsigned long arg)
1914 {
1915         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1916         int err;
1917
1918         switch (cmd) {
1919         case CDROMSETSPINDOWN:
1920                 return idecd_set_spindown(&info->devinfo, arg);
1921         case CDROMGETSPINDOWN:
1922                 return idecd_get_spindown(&info->devinfo, arg);
1923         default:
1924                 break;
1925         }
1926
1927         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1928         if (err == -EINVAL)
1929                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1930
1931         return err;
1932 }
1933
1934 static int idecd_media_changed(struct gendisk *disk)
1935 {
1936         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1937         return cdrom_media_changed(&info->devinfo);
1938 }
1939
1940 static int idecd_revalidate_disk(struct gendisk *disk)
1941 {
1942         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1943         struct request_sense sense;
1944
1945         ide_cd_read_toc(info->drive, &sense);
1946
1947         return  0;
1948 }
1949
1950 static struct block_device_operations idecd_ops = {
1951         .owner                  = THIS_MODULE,
1952         .open                   = idecd_open,
1953         .release                = idecd_release,
1954         .locked_ioctl           = idecd_ioctl,
1955         .media_changed          = idecd_media_changed,
1956         .revalidate_disk        = idecd_revalidate_disk
1957 };
1958
1959 /* module options */
1960 static char *ignore;
1961 module_param(ignore, charp, 0400);
1962
1963 static unsigned long debug_mask;
1964 module_param(debug_mask, ulong, 0644);
1965
1966 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1967
1968 static int ide_cd_probe(ide_drive_t *drive)
1969 {
1970         struct cdrom_info *info;
1971         struct gendisk *g;
1972         struct request_sense sense;
1973
1974         ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1975                                      drive->driver_req, drive->media);
1976
1977         if (!strstr("ide-cdrom", drive->driver_req))
1978                 goto failed;
1979
1980         if (drive->media != ide_cdrom && drive->media != ide_optical)
1981                 goto failed;
1982
1983         /* skip drives that we were told to ignore */
1984         if (ignore != NULL) {
1985                 if (strstr(ignore, drive->name)) {
1986                         printk(KERN_INFO PFX "ignoring drive %s\n",
1987                                          drive->name);
1988                         goto failed;
1989                 }
1990         }
1991
1992         drive->debug_mask = debug_mask;
1993         drive->irq_handler = cdrom_newpc_intr;
1994
1995         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1996         if (info == NULL) {
1997                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1998                                 drive->name);
1999                 goto failed;
2000         }
2001
2002         g = alloc_disk(1 << PARTN_BITS);
2003         if (!g)
2004                 goto out_free_cd;
2005
2006         ide_init_disk(g, drive);
2007
2008         info->dev.parent = &drive->gendev;
2009         info->dev.release = ide_cd_release;
2010         dev_set_name(&info->dev, dev_name(&drive->gendev));
2011
2012         if (device_register(&info->dev))
2013                 goto out_free_disk;
2014
2015         info->drive = drive;
2016         info->driver = &ide_cdrom_driver;
2017         info->disk = g;
2018
2019         g->private_data = &info->driver;
2020
2021         drive->driver_data = info;
2022
2023         g->minors = 1;
2024         g->driverfs_dev = &drive->gendev;
2025         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2026         if (ide_cdrom_setup(drive)) {
2027                 put_device(&info->dev);
2028                 goto failed;
2029         }
2030
2031         ide_cd_read_toc(drive, &sense);
2032         g->fops = &idecd_ops;
2033         g->flags |= GENHD_FL_REMOVABLE;
2034         add_disk(g);
2035         return 0;
2036
2037 out_free_disk:
2038         put_disk(g);
2039 out_free_cd:
2040         kfree(info);
2041 failed:
2042         return -ENODEV;
2043 }
2044
2045 static void __exit ide_cdrom_exit(void)
2046 {
2047         driver_unregister(&ide_cdrom_driver.gen_driver);
2048 }
2049
2050 static int __init ide_cdrom_init(void)
2051 {
2052         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2053         return driver_register(&ide_cdrom_driver.gen_driver);
2054 }
2055
2056 MODULE_ALIAS("ide:*m-cdrom*");
2057 MODULE_ALIAS("ide-cd");
2058 module_init(ide_cdrom_init);
2059 module_exit(ide_cdrom_exit);
2060 MODULE_LICENSE("GPL");