drivers/ide/ide-cd.c

   1 /*
   2  * ATAPI CD-ROM driver.
   3  *
   4  * Copyright (C) 1994-1996   Scott Snyder <snyder@fnald0.fnal.gov>
   5  * Copyright (C) 1996-1998   Erik Andersen <andersee@debian.org>
   6  * Copyright (C) 1998-2000   Jens Axboe <axboe@suse.de>
   7  * Copyright (C) 2005, 2007  Bartlomiej Zolnierkiewicz
   8  *
   9  * May be copied or modified under the terms of the GNU General Public
  10  * License.  See linux/COPYING for more information.
  11  *
  12  * See Documentation/cdrom/ide-cd for usage information.
  13  *
  14  * Suggestions are welcome. Patches that work are more welcome though. ;-)
  15  * For those wishing to work on this driver, please be sure you download
  16  * and comply with the latest Mt. Fuji (SFF8090 version 4) and ATAPI
  17  * (SFF-8020i rev 2.6) standards. These documents can be obtained by
  18  * anonymous ftp from:
  19  * ftp://fission.dt.wdc.com/pub/standards/SFF_atapi/spec/SFF8020-r2.6/PS/8020r26.ps
  20  * ftp://ftp.avc-pioneer.com/Mtfuji4/Spec/Fuji4r10.pdf
  21  *
  22  * For historical changelog please see:
  23  *      Documentation/ide/ChangeLog.ide-cd.1994-2004
  24  */
  25
  26 #define DRV_NAME "ide-cd"
  27 #define PFX DRV_NAME ": "
  28
  29 #define IDECD_VERSION "5.00"
  30
  31 #include <linux/module.h>
  32 #include <linux/types.h>
  33 #include <linux/kernel.h>
  34 #include <linux/delay.h>
  35 #include <linux/timer.h>
  36 #include <linux/slab.h>
  37 #include <linux/interrupt.h>
  38 #include <linux/errno.h>
  39 #include <linux/cdrom.h>
  40 #include <linux/ide.h>
  41 #include <linux/completion.h>
  42 #include <linux/mutex.h>
  43 #include <linux/bcd.h>
  44
  45 /* For SCSI -> ATAPI command conversion */
  46 #include <scsi/scsi.h>
  47
  48 #include <linux/irq.h>
  49 #include <linux/io.h>
  50 #include <asm/byteorder.h>
  51 #include <linux/uaccess.h>
  52 #include <asm/unaligned.h>
  53
  54 #include "ide-cd.h"
  55
  56 static DEFINE_MUTEX(idecd_ref_mutex);
  57
  58 static void ide_cd_release(struct device *);
  59
  60 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
  61 {
  62         struct cdrom_info *cd = NULL;
  63
  64         mutex_lock(&idecd_ref_mutex);
  65         cd = ide_drv_g(disk, cdrom_info);
  66         if (cd) {
  67                 if (ide_device_get(cd->drive))
  68                         cd = NULL;
  69                 else
  70                         get_device(&cd->dev);
  71
  72         }
  73         mutex_unlock(&idecd_ref_mutex);
  74         return cd;
  75 }
  76
  77 static void ide_cd_put(struct cdrom_info *cd)
  78 {
  79         ide_drive_t *drive = cd->drive;
  80
  81         mutex_lock(&idecd_ref_mutex);
  82         put_device(&cd->dev);
  83         ide_device_put(drive);
  84         mutex_unlock(&idecd_ref_mutex);
  85 }
  86
  87 /*
  88  * Generic packet command support and error handling routines.
  89  */
  90
  91 /* Mark that we've seen a media change and invalidate our internal buffers. */
  92 static void cdrom_saw_media_change(ide_drive_t *drive)
  93 {
  94         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
  95         drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
  96 }
  97
  98 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
  99                            struct request_sense *sense)
 100 {
 101         int log = 0;
 102
 103         ide_debug_log(IDE_DBG_SENSE, "Call %s, sense_key: 0x%x\n", __func__,
 104                       sense->sense_key);
 105
 106         if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
 107                 return 0;
 108
 109         switch (sense->sense_key) {
 110         case NO_SENSE:
 111         case RECOVERED_ERROR:
 112                 break;
 113         case NOT_READY:
 114                 /*
 115                  * don't care about tray state messages for e.g. capacity
 116                  * commands or in-progress or becoming ready
 117                  */
 118                 if (sense->asc == 0x3a || sense->asc == 0x04)
 119                         break;
 120                 log = 1;
 121                 break;
 122         case ILLEGAL_REQUEST:
 123                 /*
 124                  * don't log START_STOP unit with LoEj set, since we cannot
 125                  * reliably check if drive can auto-close
 126                  */
 127                 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
 128                         break;
 129                 log = 1;
 130                 break;
 131         case UNIT_ATTENTION:
 132                 /*
 133                  * Make good and sure we've seen this potential media change.
 134                  * Some drives (i.e. Creative) fail to present the correct sense
 135                  * key in the error register.
 136                  */
 137                 cdrom_saw_media_change(drive);
 138                 break;
 139         default:
 140                 log = 1;
 141                 break;
 142         }
 143         return log;
 144 }
 145
 146 static void cdrom_analyze_sense_data(ide_drive_t *drive,
 147                               struct request *failed_command,
 148                               struct request_sense *sense)
 149 {
 150         unsigned long sector;
 151         unsigned long bio_sectors;
 152         struct cdrom_info *info = drive->driver_data;
 153
 154         ide_debug_log(IDE_DBG_SENSE, "Call %s, error_code: 0x%x, "
 155                         "sense_key: 0x%x\n", __func__, sense->error_code,
 156                         sense->sense_key);
 157
 158         if (failed_command)
 159                 ide_debug_log(IDE_DBG_SENSE, "%s: failed cmd: 0x%x\n",
 160                                 __func__, failed_command->cmd[0]);
 161
 162         if (!cdrom_log_sense(drive, failed_command, sense))
 163                 return;
 164
 165         /*
 166          * If a read toc is executed for a CD-R or CD-RW medium where the first
 167          * toc has not been recorded yet, it will fail with 05/24/00 (which is a
 168          * confusing error)
 169          */
 170         if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
 171                 if (sense->sense_key == 0x05 && sense->asc == 0x24)
 172                         return;
 173
 174         /* current error */
 175         if (sense->error_code == 0x70) {
 176                 switch (sense->sense_key) {
 177                 case MEDIUM_ERROR:
 178                 case VOLUME_OVERFLOW:
 179                 case ILLEGAL_REQUEST:
 180                         if (!sense->valid)
 181                                 break;
 182                         if (failed_command == NULL ||
 183                                         !blk_fs_request(failed_command))
 184                                 break;
 185                         sector = (sense->information[0] << 24) |
 186                                  (sense->information[1] << 16) |
 187                                  (sense->information[2] <<  8) |
 188                                  (sense->information[3]);
 189
 190                         if (drive->queue->hardsect_size == 2048)
 191                                 /* device sector size is 2K */
 192                                 sector <<= 2;
 193
 194                         bio_sectors = max(bio_sectors(failed_command->bio), 4U);
 195                         sector &= ~(bio_sectors - 1);
 196
 197                         /*
 198                          * The SCSI specification allows for the value
 199                          * returned by READ CAPACITY to be up to 75 2K
 200                          * sectors past the last readable block.
 201                          * Therefore, if we hit a medium error within the
 202                          * last 75 2K sectors, we decrease the saved size
 203                          * value.
 204                          */
 205                         if (sector < get_capacity(info->disk) &&
 206                             drive->probed_capacity - sector < 4 * 75)
 207                                 set_capacity(info->disk, sector);
 208                 }
 209         }
 210
 211         ide_cd_log_error(drive->name, failed_command, sense);
 212 }
 213
 214 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
 215                                       struct request *failed_command)
 216 {
 217         struct cdrom_info *info         = drive->driver_data;
 218         struct request *rq              = &info->request_sense_request;
 219
 220         ide_debug_log(IDE_DBG_SENSE, "Call %s\n", __func__);
 221
 222         if (sense == NULL)
 223                 sense = &info->sense_data;
 224
 225         /* stuff the sense request in front of our current request */
 226         blk_rq_init(NULL, rq);
 227         rq->cmd_type = REQ_TYPE_ATA_PC;
 228         rq->rq_disk = info->disk;
 229
 230         rq->data = sense;
 231         rq->cmd[0] = GPCMD_REQUEST_SENSE;
 232         rq->cmd[4] = 18;
 233         rq->data_len = 18;
 234
 235         rq->cmd_type = REQ_TYPE_SENSE;
 236         rq->cmd_flags |= REQ_PREEMPT;
 237
 238         /* NOTE! Save the failed command in "rq->buffer" */
 239         rq->buffer = (void *) failed_command;
 240
 241         if (failed_command)
 242                 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x\n",
 243                               failed_command->cmd[0]);
 244
 245         ide_do_drive_cmd(drive, rq);
 246 }
 247
 248 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
 249 {
 250         struct request *rq = drive->hwif->rq;
 251         int nsectors = rq->hard_cur_sectors;
 252
 253         ide_debug_log(IDE_DBG_FUNC, "Call %s, cmd: 0x%x, uptodate: 0x%x, "
 254                       "nsectors: %d\n", __func__, rq->cmd[0], uptodate,
 255                       nsectors);
 256
 257         if (blk_sense_request(rq) && uptodate) {
 258                 /*
 259                  * For REQ_TYPE_SENSE, "rq->buffer" points to the original
 260                  * failed request
 261                  */
 262                 struct request *failed = (struct request *) rq->buffer;
 263                 struct cdrom_info *info = drive->driver_data;
 264                 void *sense = &info->sense_data;
 265
 266                 if (failed) {
 267                         if (failed->sense) {
 268                                 sense = failed->sense;
 269                                 failed->sense_len = rq->sense_len;
 270                         }
 271                         cdrom_analyze_sense_data(drive, failed, sense);
 272                         /*
 273                          * now end the failed request
 274                          */
 275                         if (blk_fs_request(failed)) {
 276                                 if (ide_end_dequeued_request(drive, failed, 0,
 277                                                 failed->hard_nr_sectors))
 278                                         BUG();
 279                         } else {
 280                                 if (blk_end_request(failed, -EIO,
 281                                                     failed->data_len))
 282                                         BUG();
 283                         }
 284                 } else
 285                         cdrom_analyze_sense_data(drive, NULL, sense);
 286         }
 287
 288         if (!rq->current_nr_sectors && blk_fs_request(rq))
 289                 uptodate = 1;
 290         /* make sure it's fully ended */
 291         if (blk_pc_request(rq))
 292                 nsectors = (rq->data_len + 511) >> 9;
 293         if (!nsectors)
 294                 nsectors = 1;
 295
 296         ide_debug_log(IDE_DBG_FUNC, "Exit %s, uptodate: 0x%x, nsectors: %d\n",
 297                       __func__, uptodate, nsectors);
 298
 299         ide_end_request(drive, uptodate, nsectors);
 300 }
 301
 302 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
 303 {
 304         if (st & 0x80)
 305                 return;
 306         ide_dump_status(drive, msg, st);
 307 }
 308
 309 /*
 310  * Returns:
 311  * 0: if the request should be continued.
 312  * 1: if the request was ended.
 313  */
 314 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
 315 {
 316         ide_hwif_t *hwif = drive->hwif;
 317         struct request *rq = hwif->rq;
 318         int stat, err, sense_key;
 319
 320         /* check for errors */
 321         stat = hwif->tp_ops->read_status(hwif);
 322
 323         if (stat_ret)
 324                 *stat_ret = stat;
 325
 326         if (OK_STAT(stat, good_stat, BAD_R_STAT))
 327                 return 0;
 328
 329         /* get the IDE error register */
 330         err = ide_read_error(drive);
 331         sense_key = err >> 4;
 332
 333         if (rq == NULL) {
 334                 printk(KERN_ERR PFX "%s: missing rq in %s\n",
 335                                 drive->name, __func__);
 336                 return 1;
 337         }
 338
 339         ide_debug_log(IDE_DBG_RQ, "%s: stat: 0x%x, good_stat: 0x%x, "
 340                       "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x, err: 0x%x\n",
 341                       __func__, stat, good_stat, rq->cmd[0], rq->cmd_type, err);
 342
 343         if (blk_sense_request(rq)) {
 344                 /*
 345                  * We got an error trying to get sense info from the drive
 346                  * (probably while trying to recover from a former error).
 347                  * Just give up.
 348                  */
 349                 rq->cmd_flags |= REQ_FAILED;
 350                 cdrom_end_request(drive, 0);
 351                 ide_error(drive, "request sense failure", stat);
 352                 return 1;
 353
 354         } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
 355                 /* All other functions, except for READ. */
 356
 357                 /*
 358                  * if we have an error, pass back CHECK_CONDITION as the
 359                  * scsi status byte
 360                  */
 361                 if (blk_pc_request(rq) && !rq->errors)
 362                         rq->errors = SAM_STAT_CHECK_CONDITION;
 363
 364                 /* check for tray open */
 365                 if (sense_key == NOT_READY) {
 366                         cdrom_saw_media_change(drive);
 367                 } else if (sense_key == UNIT_ATTENTION) {
 368                         /* check for media change */
 369                         cdrom_saw_media_change(drive);
 370                         return 0;
 371                 } else if (sense_key == ILLEGAL_REQUEST &&
 372                            rq->cmd[0] == GPCMD_START_STOP_UNIT) {
 373                         /*
 374                          * Don't print error message for this condition--
 375                          * SFF8090i indicates that 5/24/00 is the correct
 376                          * response to a request to close the tray if the
 377                          * drive doesn't have that capability.
 378                          * cdrom_log_sense() knows this!
 379                          */
 380                 } else if (!(rq->cmd_flags & REQ_QUIET)) {
 381                         /* otherwise, print an error */
 382                         ide_dump_status(drive, "packet command error", stat);
 383                 }
 384
 385                 rq->cmd_flags |= REQ_FAILED;
 386
 387                 /*
 388                  * instead of playing games with moving completions around,
 389                  * remove failed request completely and end it when the
 390                  * request sense has completed
 391                  */
 392                 goto end_request;
 393
 394         } else if (blk_fs_request(rq)) {
 395                 int do_end_request = 0;
 396
 397                 /* handle errors from READ and WRITE requests */
 398
 399                 if (blk_noretry_request(rq))
 400                         do_end_request = 1;
 401
 402                 if (sense_key == NOT_READY) {
 403                         /* tray open */
 404                         if (rq_data_dir(rq) == READ) {
 405                                 cdrom_saw_media_change(drive);
 406
 407                                 /* fail the request */
 408                                 printk(KERN_ERR PFX "%s: tray open\n",
 409                                                 drive->name);
 410                                 do_end_request = 1;
 411                         } else {
 412                                 struct cdrom_info *info = drive->driver_data;
 413
 414                                 /*
 415                                  * Allow the drive 5 seconds to recover, some
 416                                  * devices will return this error while flushing
 417                                  * data from cache.
 418                                  */
 419                                 if (!rq->errors)
 420                                         info->write_timeout = jiffies +
 421                                                         ATAPI_WAIT_WRITE_BUSY;
 422                                 rq->errors = 1;
 423                                 if (time_after(jiffies, info->write_timeout))
 424                                         do_end_request = 1;
 425                                 else {
 426                                         struct request_queue *q = drive->queue;
 427                                         unsigned long flags;
 428
 429                                         /*
 430                                          * take a breather relying on the unplug
 431                                          * timer to kick us again
 432                                          */
 433                                         spin_lock_irqsave(q->queue_lock, flags);
 434                                         blk_plug_device(q);
 435                                         spin_unlock_irqrestore(q->queue_lock, flags);
 436
 437                                         return 1;
 438                                 }
 439                         }
 440                 } else if (sense_key == UNIT_ATTENTION) {
 441                         /* media change */
 442                         cdrom_saw_media_change(drive);
 443
 444                         /*
 445                          * Arrange to retry the request but be sure to give up
 446                          * if we've retried too many times.
 447                          */
 448                         if (++rq->errors > ERROR_MAX)
 449                                 do_end_request = 1;
 450                 } else if (sense_key == ILLEGAL_REQUEST ||
 451                            sense_key == DATA_PROTECT) {
 452                         /*
 453                          * No point in retrying after an illegal request or data
 454                          * protect error.
 455                          */
 456                         ide_dump_status_no_sense(drive, "command error", stat);
 457                         do_end_request = 1;
 458                 } else if (sense_key == MEDIUM_ERROR) {
 459                         /*
 460                          * No point in re-trying a zillion times on a bad
 461                          * sector. If we got here the error is not correctable.
 462                          */
 463                         ide_dump_status_no_sense(drive,
 464                                                  "media error (bad sector)",
 465                                                  stat);
 466                         do_end_request = 1;
 467                 } else if (sense_key == BLANK_CHECK) {
 468                         /* disk appears blank ?? */
 469                         ide_dump_status_no_sense(drive, "media error (blank)",
 470                                                  stat);
 471                         do_end_request = 1;
 472                 } else if ((err & ~ATA_ABORTED) != 0) {
 473                         /* go to the default handler for other errors */
 474                         ide_error(drive, "cdrom_decode_status", stat);
 475                         return 1;
 476                 } else if ((++rq->errors > ERROR_MAX)) {
 477                         /* we've racked up too many retries, abort */
 478                         do_end_request = 1;
 479                 }
 480
 481                 /*
 482                  * End a request through request sense analysis when we have
 483                  * sense data. We need this in order to perform end of media
 484                  * processing.
 485                  */
 486                 if (do_end_request)
 487                         goto end_request;
 488
 489                 /*
 490                  * If we got a CHECK_CONDITION status, queue
 491                  * a request sense command.
 492                  */
 493                 if (stat & ATA_ERR)
 494                         cdrom_queue_request_sense(drive, NULL, NULL);
 495         } else {
 496                 blk_dump_rq_flags(rq, PFX "bad rq");
 497                 cdrom_end_request(drive, 0);
 498         }
 499
 500         /* retry, or handle the next request */
 501         return 1;
 502
 503 end_request:
 504         if (stat & ATA_ERR) {
 505                 struct request_queue *q = drive->queue;
 506                 unsigned long flags;
 507
 508                 spin_lock_irqsave(q->queue_lock, flags);
 509                 blkdev_dequeue_request(rq);
 510                 spin_unlock_irqrestore(q->queue_lock, flags);
 511
 512                 hwif->rq = NULL;
 513
 514                 cdrom_queue_request_sense(drive, rq->sense, rq);
 515         } else
 516                 cdrom_end_request(drive, 0);
 517
 518         return 1;
 519 }
 520
 521 /*
 522  * Check the contents of the interrupt reason register from the cdrom
 523  * and attempt to recover if there are problems.  Returns  0 if everything's
 524  * ok; nonzero if the request has been terminated.
 525  */
 526 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
 527                                 int len, int ireason, int rw)
 528 {
 529         ide_hwif_t *hwif = drive->hwif;
 530
 531         ide_debug_log(IDE_DBG_FUNC, "Call %s, ireason: 0x%x, rw: 0x%x\n",
 532                       __func__, ireason, rw);
 533
 534         /*
 535          * ireason == 0: the drive wants to receive data from us
 536          * ireason == 2: the drive is expecting to transfer data to us
 537          */
 538         if (ireason == (!rw << 1))
 539                 return 0;
 540         else if (ireason == (rw << 1)) {
 541
 542                 /* whoops... */
 543                 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
 544                                 drive->name, __func__);
 545
 546                 ide_pad_transfer(drive, rw, len);
 547         } else  if (rw == 0 && ireason == 1) {
 548                 /*
 549                  * Some drives (ASUS) seem to tell us that status info is
 550                  * available.  Just get it and ignore.
 551                  */
 552                 (void)hwif->tp_ops->read_status(hwif);
 553                 return 0;
 554         } else {
 555                 /* drive wants a command packet, or invalid ireason... */
 556                 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
 557                                 drive->name, __func__, ireason);
 558         }
 559
 560         if (rq->cmd_type == REQ_TYPE_ATA_PC)
 561                 rq->cmd_flags |= REQ_FAILED;
 562
 563         cdrom_end_request(drive, 0);
 564         return -1;
 565 }
 566
 567 /*
 568  * Assume that the drive will always provide data in multiples of at least
 569  * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
 570  */
 571 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
 572 {
 573         ide_debug_log(IDE_DBG_FUNC, "Call %s, len: %d\n", __func__, len);
 574
 575         if ((len % SECTOR_SIZE) == 0)
 576                 return 0;
 577
 578         printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
 579                         __func__, len);
 580
 581         if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
 582                 printk(KERN_ERR PFX "This drive is not supported by this "
 583                                 "version of the driver\n");
 584         else {
 585                 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
 586                 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
 587         }
 588
 589         return 1;
 590 }
 591
 592 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
 593                                                  struct request *rq)
 594 {
 595         ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd_flags: 0x%x\n", __func__,
 596                       rq->cmd_flags);
 597
 598         if (rq_data_dir(rq) == READ) {
 599                 unsigned short sectors_per_frame =
 600                         queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 601                 int nskip = rq->sector & (sectors_per_frame - 1);
 602
 603                 /*
 604                  * If the requested sector doesn't start on a frame boundary,
 605                  * we must adjust the start of the transfer so that it does,
 606                  * and remember to skip the first few sectors.
 607                  *
 608                  * If the rq->current_nr_sectors field is larger than the size
 609                  * of the buffer, it will mean that we're to skip a number of
 610                  * sectors equal to the amount by which rq->current_nr_sectors
 611                  * is larger than the buffer size.
 612                  */
 613                 if (nskip > 0) {
 614                         /* sanity check... */
 615                         if (rq->current_nr_sectors !=
 616                             bio_cur_sectors(rq->bio)) {
 617                                 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
 618                                                 drive->name, __func__,
 619                                                 rq->current_nr_sectors);
 620                                 cdrom_end_request(drive, 0);
 621                                 return ide_stopped;
 622                         }
 623                         rq->current_nr_sectors += nskip;
 624                 }
 625         }
 626
 627         /* set up the command */
 628         rq->timeout = ATAPI_WAIT_PC;
 629
 630         return ide_started;
 631 }
 632
 633 /*
 634  * Fix up a possibly partially-processed request so that we can start it over
 635  * entirely, or even put it back on the request queue.
 636  */
 637 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
 638 {
 639
 640         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
 641
 642         if (rq->buffer != bio_data(rq->bio)) {
 643                 sector_t n =
 644                         (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
 645
 646                 rq->buffer = bio_data(rq->bio);
 647                 rq->nr_sectors += n;
 648                 rq->sector -= n;
 649         }
 650         rq->current_nr_sectors = bio_cur_sectors(rq->bio);
 651         rq->hard_cur_sectors = rq->current_nr_sectors;
 652         rq->hard_nr_sectors = rq->nr_sectors;
 653         rq->hard_sector = rq->sector;
 654         rq->q->prep_rq_fn(rq->q, rq);
 655 }
 656
 657 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
 658 {
 659         ide_debug_log(IDE_DBG_FUNC, "Call %s, rq->cmd[0]: 0x%x\n",
 660                       __func__, rq->cmd[0]);
 661
 662         /*
 663          * Some of the trailing request sense fields are optional,
 664          * and some drives don't send them.  Sigh.
 665          */
 666         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 667             rq->data_len > 0 && rq->data_len <= 5)
 668                 while (rq->data_len > 0) {
 669                         *(u8 *)rq->data++ = 0;
 670                         --rq->data_len;
 671                 }
 672 }
 673
 674 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 675                     int write, void *buffer, unsigned *bufflen,
 676                     struct request_sense *sense, int timeout,
 677                     unsigned int cmd_flags)
 678 {
 679         struct cdrom_info *info = drive->driver_data;
 680         struct request_sense local_sense;
 681         int retries = 10;
 682         unsigned int flags = 0;
 683
 684         if (!sense)
 685                 sense = &local_sense;
 686
 687         ide_debug_log(IDE_DBG_PC, "Call %s, cmd[0]: 0x%x, write: 0x%x, "
 688                       "timeout: %d, cmd_flags: 0x%x\n", __func__, cmd[0], write,
 689                       timeout, cmd_flags);
 690
 691         /* start of retry loop */
 692         do {
 693                 struct request *rq;
 694                 int error;
 695
 696                 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
 697
 698                 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
 699                 rq->cmd_type = REQ_TYPE_ATA_PC;
 700                 rq->sense = sense;
 701                 rq->cmd_flags |= cmd_flags;
 702                 rq->timeout = timeout;
 703                 if (buffer) {
 704                         rq->data = buffer;
 705                         rq->data_len = *bufflen;
 706                 }
 707
 708                 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 709
 710                 if (buffer)
 711                         *bufflen = rq->data_len;
 712
 713                 flags = rq->cmd_flags;
 714                 blk_put_request(rq);
 715
 716                 /*
 717                  * FIXME: we should probably abort/retry or something in case of
 718                  * failure.
 719                  */
 720                 if (flags & REQ_FAILED) {
 721                         /*
 722                          * The request failed.  Retry if it was due to a unit
 723                          * attention status (usually means media was changed).
 724                          */
 725                         struct request_sense *reqbuf = sense;
 726
 727                         if (reqbuf->sense_key == UNIT_ATTENTION)
 728                                 cdrom_saw_media_change(drive);
 729                         else if (reqbuf->sense_key == NOT_READY &&
 730                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 731                                 /*
 732                                  * The drive is in the process of loading
 733                                  * a disk.  Retry, but wait a little to give
 734                                  * the drive time to complete the load.
 735                                  */
 736                                 ssleep(2);
 737                         } else {
 738                                 /* otherwise, don't retry */
 739                                 retries = 0;
 740                         }
 741                         --retries;
 742                 }
 743
 744                 /* end of retry loop */
 745         } while ((flags & REQ_FAILED) && retries >= 0);
 746
 747         /* return an error if the command failed */
 748         return (flags & REQ_FAILED) ? -EIO : 0;
 749 }
 750
 751 /*
 752  * Called from blk_end_request_callback() after the data of the request is
 753  * completed and before the request itself is completed. By returning value '1',
 754  * blk_end_request_callback() returns immediately without completing it.
 755  */
 756 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
 757 {
 758         return 1;
 759 }
 760
 761 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 762 {
 763         ide_hwif_t *hwif = drive->hwif;
 764         struct request *rq = hwif->rq;
 765         xfer_func_t *xferfunc;
 766         ide_expiry_t *expiry = NULL;
 767         int dma_error = 0, dma, stat, thislen, uptodate = 0;
 768         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
 769         unsigned int timeout;
 770         u16 len;
 771         u8 ireason;
 772
 773         ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x\n",
 774                       __func__, rq->cmd[0], write);
 775
 776         /* check for errors */
 777         dma = drive->dma;
 778         if (dma) {
 779                 drive->dma = 0;
 780                 dma_error = hwif->dma_ops->dma_end(drive);
 781                 if (dma_error) {
 782                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 783                                         write ? "write" : "read");
 784                         ide_dma_off(drive);
 785                 }
 786         }
 787
 788         if (cdrom_decode_status(drive, 0, &stat))
 789                 return ide_stopped;
 790
 791         /* using dma, transfer is complete now */
 792         if (dma) {
 793                 if (dma_error)
 794                         return ide_error(drive, "dma error", stat);
 795                 if (blk_fs_request(rq)) {
 796                         ide_end_request(drive, 1, rq->nr_sectors);
 797                         return ide_stopped;
 798                 } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) {
 799                         ide_end_request(drive, 1, 1);
 800                         return ide_stopped;
 801                 }
 802                 goto end_request;
 803         }
 804
 805         ide_read_bcount_and_ireason(drive, &len, &ireason);
 806
 807         thislen = blk_fs_request(rq) ? len : rq->data_len;
 808         if (thislen > len)
 809                 thislen = len;
 810
 811         ide_debug_log(IDE_DBG_PC, "%s: DRQ: stat: 0x%x, thislen: %d\n",
 812                       __func__, stat, thislen);
 813
 814         /* If DRQ is clear, the command has completed. */
 815         if ((stat & ATA_DRQ) == 0) {
 816                 if (blk_fs_request(rq)) {
 817                         /*
 818                          * If we're not done reading/writing, complain.
 819                          * Otherwise, complete the command normally.
 820                          */
 821                         uptodate = 1;
 822                         if (rq->current_nr_sectors > 0) {
 823                                 printk(KERN_ERR PFX "%s: %s: data underrun "
 824                                                 "(%d blocks)\n",
 825                                                 drive->name, __func__,
 826                                                 rq->current_nr_sectors);
 827                                 if (!write)
 828                                         rq->cmd_flags |= REQ_FAILED;
 829                                 uptodate = 0;
 830                         }
 831                         cdrom_end_request(drive, uptodate);
 832                         return ide_stopped;
 833                 } else if (!blk_pc_request(rq)) {
 834                         ide_cd_request_sense_fixup(drive, rq);
 835                         /* complain if we still have data left to transfer */
 836                         uptodate = rq->data_len ? 0 : 1;
 837                 }
 838                 goto end_request;
 839         }
 840
 841         /* check which way to transfer data */
 842         if (ide_cd_check_ireason(drive, rq, len, ireason, write))
 843                 return ide_stopped;
 844
 845         if (blk_fs_request(rq)) {
 846                 if (write == 0) {
 847                         int nskip;
 848
 849                         if (ide_cd_check_transfer_size(drive, len)) {
 850                                 cdrom_end_request(drive, 0);
 851                                 return ide_stopped;
 852                         }
 853
 854                         /*
 855                          * First, figure out if we need to bit-bucket
 856                          * any of the leading sectors.
 857                          */
 858                         nskip = min_t(int, rq->current_nr_sectors
 859                                            - bio_cur_sectors(rq->bio),
 860                                            thislen >> 9);
 861                         if (nskip > 0) {
 862                                 ide_pad_transfer(drive, write, nskip << 9);
 863                                 rq->current_nr_sectors -= nskip;
 864                                 thislen -= (nskip << 9);
 865                         }
 866                 }
 867         }
 868
 869         if (ireason == 0) {
 870                 write = 1;
 871                 xferfunc = hwif->tp_ops->output_data;
 872         } else {
 873                 write = 0;
 874                 xferfunc = hwif->tp_ops->input_data;
 875         }
 876
 877         ide_debug_log(IDE_DBG_PC, "%s: data transfer, rq->cmd_type: 0x%x, "
 878                       "ireason: 0x%x\n", __func__, rq->cmd_type, ireason);
 879
 880         /* transfer data */
 881         while (thislen > 0) {
 882                 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
 883                 int blen = rq->data_len;
 884
 885                 /* bio backed? */
 886                 if (rq->bio) {
 887                         if (blk_fs_request(rq)) {
 888                                 ptr = rq->buffer;
 889                                 blen = rq->current_nr_sectors << 9;
 890                         } else {
 891                                 ptr = bio_data(rq->bio);
 892                                 blen = bio_iovec(rq->bio)->bv_len;
 893                         }
 894                 }
 895
 896                 if (!ptr) {
 897                         if (blk_fs_request(rq) && !write)
 898                                 /*
 899                                  * If the buffers are full, pipe the rest into
 900                                  * oblivion.
 901                                  */
 902                                 ide_pad_transfer(drive, 0, thislen);
 903                         else {
 904                                 printk(KERN_ERR PFX "%s: confused, missing data\n",
 905                                                 drive->name);
 906                                 blk_dump_rq_flags(rq, rq_data_dir(rq)
 907                                                   ? "cdrom_newpc_intr, write"
 908                                                   : "cdrom_newpc_intr, read");
 909                         }
 910                         break;
 911                 }
 912
 913                 if (blen > thislen)
 914                         blen = thislen;
 915
 916                 xferfunc(drive, NULL, ptr, blen);
 917
 918                 thislen -= blen;
 919                 len -= blen;
 920
 921                 if (blk_fs_request(rq)) {
 922                         rq->buffer += blen;
 923                         rq->nr_sectors -= (blen >> 9);
 924                         rq->current_nr_sectors -= (blen >> 9);
 925                         rq->sector += (blen >> 9);
 926
 927                         if (rq->current_nr_sectors == 0 && rq->nr_sectors)
 928                                 cdrom_end_request(drive, 1);
 929                 } else {
 930                         rq->data_len -= blen;
 931
 932                         /*
 933                          * The request can't be completed until DRQ is cleared.
 934                          * So complete the data, but don't complete the request
 935                          * using the dummy function for the callback feature
 936                          * of blk_end_request_callback().
 937                          */
 938                         if (rq->bio)
 939                                 blk_end_request_callback(rq, 0, blen,
 940                                                  cdrom_newpc_intr_dummy_cb);
 941                         else
 942                                 rq->data += blen;
 943                 }
 944                 if (!write && blk_sense_request(rq))
 945                         rq->sense_len += blen;
 946         }
 947
 948         /* pad, if necessary */
 949         if (!blk_fs_request(rq) && len > 0)
 950                 ide_pad_transfer(drive, write, len);
 951
 952         if (blk_pc_request(rq)) {
 953                 timeout = rq->timeout;
 954         } else {
 955                 timeout = ATAPI_WAIT_PC;
 956                 if (!blk_fs_request(rq))
 957                         expiry = ide_cd_expiry;
 958         }
 959
 960         ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
 961         return ide_started;
 962
 963 end_request:
 964         if (blk_pc_request(rq)) {
 965                 unsigned int dlen = rq->data_len;
 966
 967                 if (dma)
 968                         rq->data_len = 0;
 969
 970                 if (blk_end_request(rq, 0, dlen))
 971                         BUG();
 972
 973                 hwif->rq = NULL;
 974         } else {
 975                 if (!uptodate)
 976                         rq->cmd_flags |= REQ_FAILED;
 977                 cdrom_end_request(drive, uptodate);
 978         }
 979         return ide_stopped;
 980 }
 981
 982 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 983 {
 984         struct cdrom_info *cd = drive->driver_data;
 985         int write = rq_data_dir(rq) == WRITE;
 986         unsigned short sectors_per_frame =
 987                 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 988
 989         ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x, "
 990                       "secs_per_frame: %u\n",
 991                       __func__, rq->cmd[0], write, sectors_per_frame);
 992
 993         if (write) {
 994                 /* disk has become write protected */
 995                 if (get_disk_ro(cd->disk)) {
 996                         cdrom_end_request(drive, 0);
 997                         return ide_stopped;
 998                 }
 999         } else {
1000                 /*
1001                  * We may be retrying this request after an error.  Fix up any
1002                  * weirdness which might be present in the request packet.
1003                  */
1004                 ide_cd_restore_request(drive, rq);
1005         }
1006
1007         /* use DMA, if possible / writes *must* be hardware frame aligned */
1008         if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1009             (rq->sector & (sectors_per_frame - 1))) {
1010                 if (write) {
1011                         cdrom_end_request(drive, 0);
1012                         return ide_stopped;
1013                 }
1014                 drive->dma = 0;
1015         } else
1016                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1017
1018         if (write)
1019                 cd->devinfo.media_written = 1;
1020
1021         return ide_started;
1022 }
1023
1024 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1025 {
1026
1027         ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, "
1028                       "rq->cmd_type: 0x%x\n", __func__, rq->cmd[0],
1029                       rq->cmd_type);
1030
1031         if (blk_pc_request(rq))
1032                 rq->cmd_flags |= REQ_QUIET;
1033         else
1034                 rq->cmd_flags &= ~REQ_FAILED;
1035
1036         drive->dma = 0;
1037
1038         /* sg request */
1039         if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1040                 struct request_queue *q = drive->queue;
1041                 unsigned int alignment;
1042                 char *buf;
1043
1044                 if (rq->bio)
1045                         buf = bio_data(rq->bio);
1046                 else
1047                         buf = rq->data;
1048
1049                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1050
1051                 /*
1052                  * check if dma is safe
1053                  *
1054                  * NOTE! The "len" and "addr" checks should possibly have
1055                  * separate masks.
1056                  */
1057                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1058                 if ((unsigned long)buf & alignment
1059                     || rq->data_len & q->dma_pad_mask
1060                     || object_is_on_stack(buf))
1061                         drive->dma = 0;
1062         }
1063 }
1064
1065 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1066                                         sector_t block)
1067 {
1068         ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, "
1069                       "rq->cmd_type: 0x%x, block: %llu\n",
1070                       __func__, rq->cmd[0], rq->cmd_type,
1071                       (unsigned long long)block);
1072
1073         if (blk_fs_request(rq)) {
1074                 if (cdrom_start_rw(drive, rq) == ide_stopped)
1075                         return ide_stopped;
1076
1077                 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1078                         return ide_stopped;
1079         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1080                    rq->cmd_type == REQ_TYPE_ATA_PC) {
1081                 if (!rq->timeout)
1082                         rq->timeout = ATAPI_WAIT_PC;
1083
1084                 cdrom_do_block_pc(drive, rq);
1085         } else if (blk_special_request(rq)) {
1086                 /* right now this can only be a reset... */
1087                 cdrom_end_request(drive, 1);
1088                 return ide_stopped;
1089         } else {
1090                 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1091                 cdrom_end_request(drive, 0);
1092                 return ide_stopped;
1093         }
1094
1095         return ide_issue_pc(drive);
1096 }
1097
1098 /*
1099  * Ioctl handling.
1100  *
1101  * Routines which queue packet commands take as a final argument a pointer to a
1102  * request_sense struct. If execution of the command results in an error with a
1103  * CHECK CONDITION status, this structure will be filled with the results of the
1104  * subsequent request sense command. The pointer can also be NULL, in which case
1105  * no sense information is returned.
1106  */
1107 static void msf_from_bcd(struct atapi_msf *msf)
1108 {
1109         msf->minute = bcd2bin(msf->minute);
1110         msf->second = bcd2bin(msf->second);
1111         msf->frame  = bcd2bin(msf->frame);
1112 }
1113
1114 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1115 {
1116         struct cdrom_info *info = drive->driver_data;
1117         struct cdrom_device_info *cdi = &info->devinfo;
1118         unsigned char cmd[BLK_MAX_CDB];
1119
1120         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1121
1122         memset(cmd, 0, BLK_MAX_CDB);
1123         cmd[0] = GPCMD_TEST_UNIT_READY;
1124
1125         /*
1126          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1127          * instead of supporting the LOAD_UNLOAD opcode.
1128          */
1129         cmd[7] = cdi->sanyo_slot % 3;
1130
1131         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1132 }
1133
1134 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1135                                unsigned long *sectors_per_frame,
1136                                struct request_sense *sense)
1137 {
1138         struct {
1139                 __be32 lba;
1140                 __be32 blocklen;
1141         } capbuf;
1142
1143         int stat;
1144         unsigned char cmd[BLK_MAX_CDB];
1145         unsigned len = sizeof(capbuf);
1146         u32 blocklen;
1147
1148         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1149
1150         memset(cmd, 0, BLK_MAX_CDB);
1151         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1152
1153         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1154                                REQ_QUIET);
1155         if (stat)
1156                 return stat;
1157
1158         /*
1159          * Sanity check the given block size
1160          */
1161         blocklen = be32_to_cpu(capbuf.blocklen);
1162         switch (blocklen) {
1163         case 512:
1164         case 1024:
1165         case 2048:
1166         case 4096:
1167                 break;
1168         default:
1169                 printk(KERN_ERR PFX "%s: weird block size %u\n",
1170                                 drive->name, blocklen);
1171                 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1172                                 drive->name);
1173                 blocklen = 2048;
1174                 break;
1175         }
1176
1177         *capacity = 1 + be32_to_cpu(capbuf.lba);
1178         *sectors_per_frame = blocklen >> SECTOR_BITS;
1179
1180         ide_debug_log(IDE_DBG_PROBE, "%s: cap: %lu, sectors_per_frame: %lu\n",
1181                       __func__, *capacity, *sectors_per_frame);
1182
1183         return 0;
1184 }
1185
1186 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1187                                 int format, char *buf, int buflen,
1188                                 struct request_sense *sense)
1189 {
1190         unsigned char cmd[BLK_MAX_CDB];
1191
1192         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1193
1194         memset(cmd, 0, BLK_MAX_CDB);
1195
1196         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1197         cmd[6] = trackno;
1198         cmd[7] = (buflen >> 8);
1199         cmd[8] = (buflen & 0xff);
1200         cmd[9] = (format << 6);
1201
1202         if (msf_flag)
1203                 cmd[1] = 2;
1204
1205         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1206 }
1207
1208 /* Try to read the entire TOC for the disk into our internal buffer. */
1209 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1210 {
1211         int stat, ntracks, i;
1212         struct cdrom_info *info = drive->driver_data;
1213         struct cdrom_device_info *cdi = &info->devinfo;
1214         struct atapi_toc *toc = info->toc;
1215         struct {
1216                 struct atapi_toc_header hdr;
1217                 struct atapi_toc_entry  ent;
1218         } ms_tmp;
1219         long last_written;
1220         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1221
1222         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1223
1224         if (toc == NULL) {
1225                 /* try to allocate space */
1226                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1227                 if (toc == NULL) {
1228                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1229                                         drive->name);
1230                         return -ENOMEM;
1231                 }
1232                 info->toc = toc;
1233         }
1234
1235         /*
1236          * Check to see if the existing data is still valid. If it is,
1237          * just return.
1238          */
1239         (void) cdrom_check_status(drive, sense);
1240
1241         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1242                 return 0;
1243
1244         /* try to get the total cdrom capacity and sector size */
1245         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1246                                    sense);
1247         if (stat)
1248                 toc->capacity = 0x1fffff;
1249
1250         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1251         /* save a private copy of the TOC capacity for error handling */
1252         drive->probed_capacity = toc->capacity * sectors_per_frame;
1253
1254         blk_queue_hardsect_size(drive->queue,
1255                                 sectors_per_frame << SECTOR_BITS);
1256
1257         /* first read just the header, so we know how long the TOC is */
1258         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1259                                     sizeof(struct atapi_toc_header), sense);
1260         if (stat)
1261                 return stat;
1262
1263         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1264                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1265                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1266         }
1267
1268         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1269         if (ntracks <= 0)
1270                 return -EIO;
1271         if (ntracks > MAX_TRACKS)
1272                 ntracks = MAX_TRACKS;
1273
1274         /* now read the whole schmeer */
1275         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1276                                   (char *)&toc->hdr,
1277                                    sizeof(struct atapi_toc_header) +
1278                                    (ntracks + 1) *
1279                                    sizeof(struct atapi_toc_entry), sense);
1280
1281         if (stat && toc->hdr.first_track > 1) {
1282                 /*
1283                  * Cds with CDI tracks only don't have any TOC entries, despite
1284                  * of this the returned values are
1285                  * first_track == last_track = number of CDI tracks + 1,
1286                  * so that this case is indistinguishable from the same layout
1287                  * plus an additional audio track. If we get an error for the
1288                  * regular case, we assume a CDI without additional audio
1289                  * tracks. In this case the readable TOC is empty (CDI tracks
1290                  * are not included) and only holds the Leadout entry.
1291                  *
1292                  * Heiko Eißfeldt.
1293                  */
1294                 ntracks = 0;
1295                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1296                                            (char *)&toc->hdr,
1297                                            sizeof(struct atapi_toc_header) +
1298                                            (ntracks + 1) *
1299                                            sizeof(struct atapi_toc_entry),
1300                                            sense);
1301                 if (stat)
1302                         return stat;
1303
1304                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1305                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1306                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1307                 } else {
1308                         toc->hdr.first_track = CDROM_LEADOUT;
1309                         toc->hdr.last_track = CDROM_LEADOUT;
1310                 }
1311         }
1312
1313         if (stat)
1314                 return stat;
1315
1316         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1317
1318         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1319                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1320                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1321         }
1322
1323         for (i = 0; i <= ntracks; i++) {
1324                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1325                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1326                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1327                         msf_from_bcd(&toc->ent[i].addr.msf);
1328                 }
1329                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1330                                                   toc->ent[i].addr.msf.second,
1331                                                   toc->ent[i].addr.msf.frame);
1332         }
1333
1334         if (toc->hdr.first_track != CDROM_LEADOUT) {
1335                 /* read the multisession information */
1336                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1337                                            sizeof(ms_tmp), sense);
1338                 if (stat)
1339                         return stat;
1340
1341                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1342         } else {
1343                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1344                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1345                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1346         }
1347
1348         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1349                 /* re-read multisession information using MSF format */
1350                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1351                                            sizeof(ms_tmp), sense);
1352                 if (stat)
1353                         return stat;
1354
1355                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1356                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1357                                                    ms_tmp.ent.addr.msf.second,
1358                                                    ms_tmp.ent.addr.msf.frame);
1359         }
1360
1361         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1362
1363         /* now try to get the total cdrom capacity */
1364         stat = cdrom_get_last_written(cdi, &last_written);
1365         if (!stat && (last_written > toc->capacity)) {
1366                 toc->capacity = last_written;
1367                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1368                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1369         }
1370
1371         /* Remember that we've read this stuff. */
1372         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1373
1374         return 0;
1375 }
1376
1377 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1378 {
1379         struct cdrom_info *info = drive->driver_data;
1380         struct cdrom_device_info *cdi = &info->devinfo;
1381         struct packet_command cgc;
1382         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1383
1384         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1385
1386         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1387                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1388
1389         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1390         do {
1391                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1392                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1393                 if (!stat)
1394                         break;
1395         } while (--attempts);
1396         return stat;
1397 }
1398
1399 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1400 {
1401         struct cdrom_info *cd = drive->driver_data;
1402         u16 curspeed, maxspeed;
1403
1404         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1405
1406         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1407                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1408                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1409         } else {
1410                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1411                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1412         }
1413
1414         ide_debug_log(IDE_DBG_PROBE, "%s: curspeed: %u, maxspeed: %u\n",
1415                       __func__, curspeed, maxspeed);
1416
1417         cd->current_speed = (curspeed + (176/2)) / 176;
1418         cd->max_speed = (maxspeed + (176/2)) / 176;
1419 }
1420
1421 #define IDE_CD_CAPABILITIES \
1422         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1423          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1424          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1425          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1426          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1427
1428 static struct cdrom_device_ops ide_cdrom_dops = {
1429         .open                   = ide_cdrom_open_real,
1430         .release                = ide_cdrom_release_real,
1431         .drive_status           = ide_cdrom_drive_status,
1432         .media_changed          = ide_cdrom_check_media_change_real,
1433         .tray_move              = ide_cdrom_tray_move,
1434         .lock_door              = ide_cdrom_lock_door,
1435         .select_speed           = ide_cdrom_select_speed,
1436         .get_last_session       = ide_cdrom_get_last_session,
1437         .get_mcn                = ide_cdrom_get_mcn,
1438         .reset                  = ide_cdrom_reset,
1439         .audio_ioctl            = ide_cdrom_audio_ioctl,
1440         .capability             = IDE_CD_CAPABILITIES,
1441         .generic_packet         = ide_cdrom_packet,
1442 };
1443
1444 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1445 {
1446         struct cdrom_info *info = drive->driver_data;
1447         struct cdrom_device_info *devinfo = &info->devinfo;
1448
1449         ide_debug_log(IDE_DBG_PROBE, "Call %s, nslots: %d\n", __func__, nslots);
1450
1451         devinfo->ops = &ide_cdrom_dops;
1452         devinfo->speed = info->current_speed;
1453         devinfo->capacity = nslots;
1454         devinfo->handle = drive;
1455         strcpy(devinfo->name, drive->name);
1456
1457         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1458                 devinfo->mask |= CDC_SELECT_SPEED;
1459
1460         devinfo->disk = info->disk;
1461         return register_cdrom(devinfo);
1462 }
1463
1464 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1465 {
1466         struct cdrom_info *cd = drive->driver_data;
1467         struct cdrom_device_info *cdi = &cd->devinfo;
1468         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1469         mechtype_t mechtype;
1470         int nslots = 1;
1471
1472         ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->media: 0x%x, "
1473                       "drive->atapi_flags: 0x%lx\n", __func__, drive->media,
1474                       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, "Call %s\n", __func__);
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, "Call %s\n", __func__);
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, "Call %s\n", __func__);
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         .end_request            = ide_end_request,
1841 #ifdef CONFIG_IDE_PROC_FS
1842         .proc_entries           = ide_cd_proc_entries,
1843         .proc_devsets           = ide_cd_proc_devsets,
1844 #endif
1845 };
1846
1847 static int idecd_open(struct block_device *bdev, fmode_t mode)
1848 {
1849         struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1850         int rc = -ENOMEM;
1851
1852         if (!info)
1853                 return -ENXIO;
1854
1855         rc = cdrom_open(&info->devinfo, bdev, mode);
1856
1857         if (rc < 0)
1858                 ide_cd_put(info);
1859
1860         return rc;
1861 }
1862
1863 static int idecd_release(struct gendisk *disk, fmode_t mode)
1864 {
1865         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1866
1867         cdrom_release(&info->devinfo, mode);
1868
1869         ide_cd_put(info);
1870
1871         return 0;
1872 }
1873
1874 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1875 {
1876         struct packet_command cgc;
1877         char buffer[16];
1878         int stat;
1879         char spindown;
1880
1881         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1882                 return -EFAULT;
1883
1884         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1885
1886         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1887         if (stat)
1888                 return stat;
1889
1890         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1891         return cdrom_mode_select(cdi, &cgc);
1892 }
1893
1894 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1895 {
1896         struct packet_command cgc;
1897         char buffer[16];
1898         int stat;
1899         char spindown;
1900
1901         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1902
1903         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1904         if (stat)
1905                 return stat;
1906
1907         spindown = buffer[11] & 0x0f;
1908         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1909                 return -EFAULT;
1910         return 0;
1911 }
1912
1913 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1914                         unsigned int cmd, unsigned long arg)
1915 {
1916         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1917         int err;
1918
1919         switch (cmd) {
1920         case CDROMSETSPINDOWN:
1921                 return idecd_set_spindown(&info->devinfo, arg);
1922         case CDROMGETSPINDOWN:
1923                 return idecd_get_spindown(&info->devinfo, arg);
1924         default:
1925                 break;
1926         }
1927
1928         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1929         if (err == -EINVAL)
1930                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1931
1932         return err;
1933 }
1934
1935 static int idecd_media_changed(struct gendisk *disk)
1936 {
1937         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1938         return cdrom_media_changed(&info->devinfo);
1939 }
1940
1941 static int idecd_revalidate_disk(struct gendisk *disk)
1942 {
1943         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1944         struct request_sense sense;
1945
1946         ide_cd_read_toc(info->drive, &sense);
1947
1948         return  0;
1949 }
1950
1951 static struct block_device_operations idecd_ops = {
1952         .owner                  = THIS_MODULE,
1953         .open                   = idecd_open,
1954         .release                = idecd_release,
1955         .locked_ioctl           = idecd_ioctl,
1956         .media_changed          = idecd_media_changed,
1957         .revalidate_disk        = idecd_revalidate_disk
1958 };
1959
1960 /* module options */
1961 static char *ignore;
1962 module_param(ignore, charp, 0400);
1963
1964 static unsigned long debug_mask;
1965 module_param(debug_mask, ulong, 0644);
1966
1967 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1968
1969 static int ide_cd_probe(ide_drive_t *drive)
1970 {
1971         struct cdrom_info *info;
1972         struct gendisk *g;
1973         struct request_sense sense;
1974
1975         ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->driver_req: %s, "
1976                       "drive->media: 0x%x\n", __func__, drive->driver_req,
1977                       drive->media);
1978
1979         if (!strstr("ide-cdrom", drive->driver_req))
1980                 goto failed;
1981
1982         if (drive->media != ide_cdrom && drive->media != ide_optical)
1983                 goto failed;
1984
1985         /* skip drives that we were told to ignore */
1986         if (ignore != NULL) {
1987                 if (strstr(ignore, drive->name)) {
1988                         printk(KERN_INFO PFX "ignoring drive %s\n",
1989                                          drive->name);
1990                         goto failed;
1991                 }
1992         }
1993
1994         drive->debug_mask = debug_mask;
1995         drive->irq_handler = cdrom_newpc_intr;
1996
1997         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1998         if (info == NULL) {
1999                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
2000                                 drive->name);
2001                 goto failed;
2002         }
2003
2004         g = alloc_disk(1 << PARTN_BITS);
2005         if (!g)
2006                 goto out_free_cd;
2007
2008         ide_init_disk(g, drive);
2009
2010         info->dev.parent = &drive->gendev;
2011         info->dev.release = ide_cd_release;
2012         dev_set_name(&info->dev, dev_name(&drive->gendev));
2013
2014         if (device_register(&info->dev))
2015                 goto out_free_disk;
2016
2017         info->drive = drive;
2018         info->driver = &ide_cdrom_driver;
2019         info->disk = g;
2020
2021         g->private_data = &info->driver;
2022
2023         drive->driver_data = info;
2024
2025         g->minors = 1;
2026         g->driverfs_dev = &drive->gendev;
2027         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2028         if (ide_cdrom_setup(drive)) {
2029                 put_device(&info->dev);
2030                 goto failed;
2031         }
2032
2033         ide_cd_read_toc(drive, &sense);
2034         g->fops = &idecd_ops;
2035         g->flags |= GENHD_FL_REMOVABLE;
2036         add_disk(g);
2037         return 0;
2038
2039 out_free_disk:
2040         put_disk(g);
2041 out_free_cd:
2042         kfree(info);
2043 failed:
2044         return -ENODEV;
2045 }
2046
2047 static void __exit ide_cdrom_exit(void)
2048 {
2049         driver_unregister(&ide_cdrom_driver.gen_driver);
2050 }
2051
2052 static int __init ide_cdrom_init(void)
2053 {
2054         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2055         return driver_register(&ide_cdrom_driver.gen_driver);
2056 }
2057
2058 MODULE_ALIAS("ide:*m-cdrom*");
2059 MODULE_ALIAS("ide-cd");
2060 module_init(ide_cdrom_init);
2061 module_exit(ide_cdrom_exit);
2062 MODULE_LICENSE("GPL");