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