git.oblomov.eu Git - linux-2.6/blob - 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, 2007-2009  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 ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
 210 {
 211         /*
 212          * For REQ_TYPE_SENSE, "rq->special" points to the original
 213          * failed request
 214          */
 215         struct request *failed = (struct request *)rq->special;
 216         struct request_sense *sense = &drive->sense_data;
 217
 218         if (failed) {
 219                 if (failed->sense) {
 220                         /*
 221                          * Sense is always read into drive->sense_data.
 222                          * Copy back if the failed request has its
 223                          * sense pointer set.
 224                          */
 225                         memcpy(failed->sense, sense, 18);
 226                         sense = failed->sense;
 227                         failed->sense_len = rq->sense_len;
 228                 }
 229                 cdrom_analyze_sense_data(drive, failed, sense);
 230
 231                 if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
 232                         BUG();
 233         } else
 234                 cdrom_analyze_sense_data(drive, NULL, sense);
 235 }
 236
 237
 238 /*
 239  * Allow the drive 5 seconds to recover; some devices will return NOT_READY
 240  * while flushing data from cache.
 241  *
 242  * returns: 0 failed (write timeout expired)
 243  *          1 success
 244  */
 245 static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
 246 {
 247
 248         struct cdrom_info *info = drive->driver_data;
 249
 250         if (!rq->errors)
 251                 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
 252
 253         rq->errors = 1;
 254
 255         if (time_after(jiffies, info->write_timeout))
 256                 return 0;
 257         else {
 258                 struct request_queue *q = drive->queue;
 259                 unsigned long flags;
 260
 261                 /*
 262                  * take a breather relying on the unplug timer to kick us again
 263                  */
 264
 265                 spin_lock_irqsave(q->queue_lock, flags);
 266                 blk_plug_device(q);
 267                 spin_unlock_irqrestore(q->queue_lock, flags);
 268
 269                 return 1;
 270         }
 271 }
 272
 273 /**
 274  * Returns:
 275  * 0: if the request should be continued.
 276  * 1: if the request will be going through error recovery.
 277  * 2: if the request should be ended.
 278  */
 279 static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 280 {
 281         ide_hwif_t *hwif = drive->hwif;
 282         struct request *rq = hwif->rq;
 283         int err, sense_key, do_end_request = 0;
 284         u8 quiet = rq->cmd_flags & REQ_QUIET;
 285
 286         /* get the IDE error register */
 287         err = ide_read_error(drive);
 288         sense_key = err >> 4;
 289
 290         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
 291                                   "stat 0x%x",
 292                                   rq->cmd[0], rq->cmd_type, err, stat);
 293
 294         if (blk_sense_request(rq)) {
 295                 /*
 296                  * We got an error trying to get sense info from the drive
 297                  * (probably while trying to recover from a former error).
 298                  * Just give up.
 299                  */
 300                 rq->cmd_flags |= REQ_FAILED;
 301                 return 2;
 302         }
 303
 304         /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
 305         if (blk_pc_request(rq) && !rq->errors)
 306                 rq->errors = SAM_STAT_CHECK_CONDITION;
 307
 308         if (blk_noretry_request(rq))
 309                 do_end_request = 1;
 310
 311         switch (sense_key) {
 312         case NOT_READY:
 313                 if (blk_fs_request(rq) && rq_data_dir(rq) == WRITE) {
 314                         if (ide_cd_breathe(drive, rq))
 315                                 return 1;
 316                 } else {
 317                         cdrom_saw_media_change(drive);
 318
 319                         if (blk_fs_request(rq) && !quiet)
 320                                 printk(KERN_ERR PFX "%s: tray open\n",
 321                                         drive->name);
 322                 }
 323                 do_end_request = 1;
 324                 break;
 325         case UNIT_ATTENTION:
 326                 cdrom_saw_media_change(drive);
 327
 328                 if (blk_fs_request(rq) == 0)
 329                         return 0;
 330
 331                 /*
 332                  * Arrange to retry the request but be sure to give up if we've
 333                  * retried too many times.
 334                  */
 335                 if (++rq->errors > ERROR_MAX)
 336                         do_end_request = 1;
 337                 break;
 338         case ILLEGAL_REQUEST:
 339                 /*
 340                  * Don't print error message for this condition -- SFF8090i
 341                  * indicates that 5/24/00 is the correct response to a request
 342                  * to close the tray if the drive doesn't have that capability.
 343                  *
 344                  * cdrom_log_sense() knows this!
 345                  */
 346                 if (rq->cmd[0] == GPCMD_START_STOP_UNIT)
 347                         break;
 348                 /* fall-through */
 349         case DATA_PROTECT:
 350                 /*
 351                  * No point in retrying after an illegal request or data
 352                  * protect error.
 353                  */
 354                 if (!quiet)
 355                         ide_dump_status(drive, "command error", stat);
 356                 do_end_request = 1;
 357                 break;
 358         case MEDIUM_ERROR:
 359                 /*
 360                  * No point in re-trying a zillion times on a bad sector.
 361                  * If we got here the error is not correctable.
 362                  */
 363                 if (!quiet)
 364                         ide_dump_status(drive, "media error "
 365                                         "(bad sector)", stat);
 366                 do_end_request = 1;
 367                 break;
 368         case BLANK_CHECK:
 369                 /* disk appears blank? */
 370                 if (!quiet)
 371                         ide_dump_status(drive, "media error (blank)",
 372                                         stat);
 373                 do_end_request = 1;
 374                 break;
 375         default:
 376                 if (blk_fs_request(rq) == 0)
 377                         break;
 378                 if (err & ~ATA_ABORTED) {
 379                         /* go to the default handler for other errors */
 380                         ide_error(drive, "cdrom_decode_status", stat);
 381                         return 1;
 382                 } else if (++rq->errors > ERROR_MAX)
 383                         /* we've racked up too many retries, abort */
 384                         do_end_request = 1;
 385         }
 386
 387         if (blk_fs_request(rq) == 0) {
 388                 rq->cmd_flags |= REQ_FAILED;
 389                 do_end_request = 1;
 390         }
 391
 392         /*
 393          * End a request through request sense analysis when we have sense data.
 394          * We need this in order to perform end of media processing.
 395          */
 396         if (do_end_request)
 397                 goto end_request;
 398
 399         /* if we got a CHECK_CONDITION status, queue a request sense command */
 400         if (stat & ATA_ERR)
 401                 ide_queue_sense_rq(drive, NULL);
 402         return 1;
 403
 404 end_request:
 405         if (stat & ATA_ERR) {
 406                 struct request_queue *q = drive->queue;
 407                 unsigned long flags;
 408
 409                 spin_lock_irqsave(q->queue_lock, flags);
 410                 blkdev_dequeue_request(rq);
 411                 spin_unlock_irqrestore(q->queue_lock, flags);
 412
 413                 hwif->rq = NULL;
 414
 415                 ide_queue_sense_rq(drive, rq);
 416                 return 1;
 417         } else
 418                 return 2;
 419 }
 420
 421 /*
 422  * Check the contents of the interrupt reason register from the cdrom
 423  * and attempt to recover if there are problems.  Returns  0 if everything's
 424  * ok; nonzero if the request has been terminated.
 425  */
 426 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
 427                                 int len, int ireason, int rw)
 428 {
 429         ide_hwif_t *hwif = drive->hwif;
 430
 431         ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw);
 432
 433         /*
 434          * ireason == 0: the drive wants to receive data from us
 435          * ireason == 2: the drive is expecting to transfer data to us
 436          */
 437         if (ireason == (!rw << 1))
 438                 return 0;
 439         else if (ireason == (rw << 1)) {
 440
 441                 /* whoops... */
 442                 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
 443                                 drive->name, __func__);
 444
 445                 ide_pad_transfer(drive, rw, len);
 446         } else  if (rw == 0 && ireason == 1) {
 447                 /*
 448                  * Some drives (ASUS) seem to tell us that status info is
 449                  * available.  Just get it and ignore.
 450                  */
 451                 (void)hwif->tp_ops->read_status(hwif);
 452                 return 0;
 453         } else {
 454                 /* drive wants a command packet, or invalid ireason... */
 455                 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
 456                                 drive->name, __func__, ireason);
 457         }
 458
 459         if (rq->cmd_type == REQ_TYPE_ATA_PC)
 460                 rq->cmd_flags |= REQ_FAILED;
 461
 462         return -1;
 463 }
 464
 465 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
 466 {
 467         struct request *rq = cmd->rq;
 468
 469         ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
 470
 471         /*
 472          * Some of the trailing request sense fields are optional,
 473          * and some drives don't send them.  Sigh.
 474          */
 475         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 476             cmd->nleft > 0 && cmd->nleft <= 5)
 477                 cmd->nleft = 0;
 478 }
 479
 480 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 481                     int write, void *buffer, unsigned *bufflen,
 482                     struct request_sense *sense, int timeout,
 483                     unsigned int cmd_flags)
 484 {
 485         struct cdrom_info *info = drive->driver_data;
 486         struct request_sense local_sense;
 487         int retries = 10;
 488         unsigned int flags = 0;
 489
 490         if (!sense)
 491                 sense = &local_sense;
 492
 493         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
 494                                   "cmd_flags: 0x%x",
 495                                   cmd[0], write, timeout, cmd_flags);
 496
 497         /* start of retry loop */
 498         do {
 499                 struct request *rq;
 500                 int error;
 501
 502                 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
 503
 504                 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
 505                 rq->cmd_type = REQ_TYPE_ATA_PC;
 506                 rq->sense = sense;
 507                 rq->cmd_flags |= cmd_flags;
 508                 rq->timeout = timeout;
 509                 if (buffer) {
 510                         rq->data = buffer;
 511                         rq->data_len = *bufflen;
 512                 }
 513
 514                 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 515
 516                 if (buffer)
 517                         *bufflen = rq->data_len;
 518
 519                 flags = rq->cmd_flags;
 520                 blk_put_request(rq);
 521
 522                 /*
 523                  * FIXME: we should probably abort/retry or something in case of
 524                  * failure.
 525                  */
 526                 if (flags & REQ_FAILED) {
 527                         /*
 528                          * The request failed.  Retry if it was due to a unit
 529                          * attention status (usually means media was changed).
 530                          */
 531                         struct request_sense *reqbuf = sense;
 532
 533                         if (reqbuf->sense_key == UNIT_ATTENTION)
 534                                 cdrom_saw_media_change(drive);
 535                         else if (reqbuf->sense_key == NOT_READY &&
 536                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 537                                 /*
 538                                  * The drive is in the process of loading
 539                                  * a disk.  Retry, but wait a little to give
 540                                  * the drive time to complete the load.
 541                                  */
 542                                 ssleep(2);
 543                         } else {
 544                                 /* otherwise, don't retry */
 545                                 retries = 0;
 546                         }
 547                         --retries;
 548                 }
 549
 550                 /* end of retry loop */
 551         } while ((flags & REQ_FAILED) && retries >= 0);
 552
 553         /* return an error if the command failed */
 554         return (flags & REQ_FAILED) ? -EIO : 0;
 555 }
 556
 557 static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 558 {
 559         unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
 560
 561         if (cmd->tf_flags & IDE_TFLAG_WRITE)
 562                 nr_bytes -= cmd->last_xfer_len;
 563
 564         if (nr_bytes > 0)
 565                 ide_complete_rq(drive, 0, nr_bytes);
 566 }
 567
 568 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 569 {
 570         ide_hwif_t *hwif = drive->hwif;
 571         struct ide_cmd *cmd = &hwif->cmd;
 572         struct request *rq = hwif->rq;
 573         ide_expiry_t *expiry = NULL;
 574         int dma_error = 0, dma, thislen, uptodate = 0;
 575         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc, nsectors;
 576         int sense = blk_sense_request(rq);
 577         unsigned int timeout;
 578         u16 len;
 579         u8 ireason, stat;
 580
 581         ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
 582
 583         /* check for errors */
 584         dma = drive->dma;
 585         if (dma) {
 586                 drive->dma = 0;
 587                 drive->waiting_for_dma = 0;
 588                 dma_error = hwif->dma_ops->dma_end(drive);
 589                 ide_dma_unmap_sg(drive, cmd);
 590                 if (dma_error) {
 591                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 592                                         write ? "write" : "read");
 593                         ide_dma_off(drive);
 594                 }
 595         }
 596
 597         /* check status */
 598         stat = hwif->tp_ops->read_status(hwif);
 599
 600         if (!OK_STAT(stat, 0, BAD_R_STAT)) {
 601                 rc = cdrom_decode_status(drive, stat);
 602                 if (rc) {
 603                         if (rc == 2)
 604                                 goto out_end;
 605                         return ide_stopped;
 606                 }
 607         }
 608
 609         /* using dma, transfer is complete now */
 610         if (dma) {
 611                 if (dma_error)
 612                         return ide_error(drive, "dma error", stat);
 613                 uptodate = 1;
 614                 goto out_end;
 615         }
 616
 617         ide_read_bcount_and_ireason(drive, &len, &ireason);
 618
 619         thislen = blk_fs_request(rq) ? len : cmd->nleft;
 620         if (thislen > len)
 621                 thislen = len;
 622
 623         ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
 624                                   stat, thislen);
 625
 626         /* If DRQ is clear, the command has completed. */
 627         if ((stat & ATA_DRQ) == 0) {
 628                 if (blk_fs_request(rq)) {
 629                         /*
 630                          * If we're not done reading/writing, complain.
 631                          * Otherwise, complete the command normally.
 632                          */
 633                         uptodate = 1;
 634                         if (cmd->nleft > 0) {
 635                                 printk(KERN_ERR PFX "%s: %s: data underrun "
 636                                         "(%u bytes)\n", drive->name, __func__,
 637                                         cmd->nleft);
 638                                 if (!write)
 639                                         rq->cmd_flags |= REQ_FAILED;
 640                                 uptodate = 0;
 641                         }
 642                 } else if (!blk_pc_request(rq)) {
 643                         ide_cd_request_sense_fixup(drive, cmd);
 644                         /* complain if we still have data left to transfer */
 645                         uptodate = cmd->nleft ? 0 : 1;
 646                         if (uptodate == 0)
 647                                 rq->cmd_flags |= REQ_FAILED;
 648                 }
 649                 goto out_end;
 650         }
 651
 652         /* check which way to transfer data */
 653         rc = ide_cd_check_ireason(drive, rq, len, ireason, write);
 654         if (rc)
 655                 goto out_end;
 656
 657         cmd->last_xfer_len = 0;
 658
 659         ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
 660                                   "ireason: 0x%x",
 661                                   rq->cmd_type, ireason);
 662
 663         /* transfer data */
 664         while (thislen > 0) {
 665                 int blen = min_t(int, thislen, cmd->nleft);
 666
 667                 if (cmd->nleft == 0)
 668                         break;
 669
 670                 ide_pio_bytes(drive, cmd, write, blen);
 671                 cmd->last_xfer_len += blen;
 672
 673                 thislen -= blen;
 674                 len -= blen;
 675
 676                 if (sense && write == 0)
 677                         rq->sense_len += blen;
 678         }
 679
 680         /* pad, if necessary */
 681         if (len > 0) {
 682                 if (blk_fs_request(rq) == 0 || write == 0)
 683                         ide_pad_transfer(drive, write, len);
 684                 else {
 685                         printk(KERN_ERR PFX "%s: confused, missing data\n",
 686                                 drive->name);
 687                         blk_dump_rq_flags(rq, "cdrom_newpc_intr");
 688                 }
 689         }
 690
 691         if (blk_pc_request(rq)) {
 692                 timeout = rq->timeout;
 693         } else {
 694                 timeout = ATAPI_WAIT_PC;
 695                 if (!blk_fs_request(rq))
 696                         expiry = ide_cd_expiry;
 697         }
 698
 699         hwif->expiry = expiry;
 700         ide_set_handler(drive, cdrom_newpc_intr, timeout);
 701         return ide_started;
 702
 703 out_end:
 704         if (blk_pc_request(rq) && rc == 0) {
 705                 unsigned int dlen = rq->data_len;
 706
 707                 rq->data_len = 0;
 708
 709                 if (blk_end_request(rq, 0, dlen))
 710                         BUG();
 711
 712                 hwif->rq = NULL;
 713         } else {
 714                 if (sense && uptodate)
 715                         ide_cd_complete_failed_rq(drive, rq);
 716
 717                 if (blk_fs_request(rq)) {
 718                         if (cmd->nleft == 0)
 719                                 uptodate = 1;
 720                 } else {
 721                         if (uptodate <= 0 && rq->errors == 0)
 722                                 rq->errors = -EIO;
 723                 }
 724
 725                 if (uptodate == 0)
 726                         ide_cd_error_cmd(drive, cmd);
 727
 728                 /* make sure it's fully ended */
 729                 if (blk_pc_request(rq))
 730                         nsectors = (rq->data_len + 511) >> 9;
 731                 else
 732                         nsectors = rq->hard_nr_sectors;
 733
 734                 if (nsectors == 0)
 735                         nsectors = 1;
 736
 737                 if (blk_fs_request(rq) == 0) {
 738                         rq->data_len -= (cmd->nbytes - cmd->nleft);
 739                         if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
 740                                 rq->data_len += cmd->last_xfer_len;
 741                 }
 742
 743                 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
 744
 745                 if (sense && rc == 2)
 746                         ide_error(drive, "request sense failure", stat);
 747         }
 748         return ide_stopped;
 749 }
 750
 751 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 752 {
 753         struct cdrom_info *cd = drive->driver_data;
 754         struct request_queue *q = drive->queue;
 755         int write = rq_data_dir(rq) == WRITE;
 756         unsigned short sectors_per_frame =
 757                 queue_hardsect_size(q) >> SECTOR_BITS;
 758
 759         ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
 760                                   "secs_per_frame: %u",
 761                                   rq->cmd[0], rq->cmd_flags, sectors_per_frame);
 762
 763         if (write) {
 764                 /* disk has become write protected */
 765                 if (get_disk_ro(cd->disk))
 766                         return ide_stopped;
 767         } else {
 768                 /*
 769                  * We may be retrying this request after an error.  Fix up any
 770                  * weirdness which might be present in the request packet.
 771                  */
 772                 q->prep_rq_fn(q, rq);
 773         }
 774
 775         /* fs requests *must* be hardware frame aligned */
 776         if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
 777             (rq->sector & (sectors_per_frame - 1)))
 778                 return ide_stopped;
 779
 780         /* use DMA, if possible */
 781         drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 782
 783         if (write)
 784                 cd->devinfo.media_written = 1;
 785
 786         rq->timeout = ATAPI_WAIT_PC;
 787
 788         return ide_started;
 789 }
 790
 791 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
 792 {
 793
 794         ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
 795                                   rq->cmd[0], rq->cmd_type);
 796
 797         if (blk_pc_request(rq))
 798                 rq->cmd_flags |= REQ_QUIET;
 799         else
 800                 rq->cmd_flags &= ~REQ_FAILED;
 801
 802         drive->dma = 0;
 803
 804         /* sg request */
 805         if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
 806                 struct request_queue *q = drive->queue;
 807                 unsigned int alignment;
 808                 char *buf;
 809
 810                 if (rq->bio)
 811                         buf = bio_data(rq->bio);
 812                 else
 813                         buf = rq->data;
 814
 815                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 816
 817                 /*
 818                  * check if dma is safe
 819                  *
 820                  * NOTE! The "len" and "addr" checks should possibly have
 821                  * separate masks.
 822                  */
 823                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
 824                 if ((unsigned long)buf & alignment
 825                     || rq->data_len & q->dma_pad_mask
 826                     || object_is_on_stack(buf))
 827                         drive->dma = 0;
 828         }
 829 }
 830
 831 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
 832                                         sector_t block)
 833 {
 834         struct ide_cmd cmd;
 835         int uptodate = 0, nsectors;
 836
 837         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
 838                                   rq->cmd[0], (unsigned long long)block);
 839
 840         if (drive->debug_mask & IDE_DBG_RQ)
 841                 blk_dump_rq_flags(rq, "ide_cd_do_request");
 842
 843         if (blk_fs_request(rq)) {
 844                 if (cdrom_start_rw(drive, rq) == ide_stopped)
 845                         goto out_end;
 846         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
 847                    rq->cmd_type == REQ_TYPE_ATA_PC) {
 848                 if (!rq->timeout)
 849                         rq->timeout = ATAPI_WAIT_PC;
 850
 851                 cdrom_do_block_pc(drive, rq);
 852         } else if (blk_special_request(rq)) {
 853                 /* right now this can only be a reset... */
 854                 uptodate = 1;
 855                 goto out_end;
 856         } else {
 857                 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
 858                 if (rq->errors == 0)
 859                         rq->errors = -EIO;
 860                 goto out_end;
 861         }
 862
 863         /* prepare sense request for this command */
 864         ide_prep_sense(drive, rq);
 865
 866         memset(&cmd, 0, sizeof(cmd));
 867
 868         if (rq_data_dir(rq))
 869                 cmd.tf_flags |= IDE_TFLAG_WRITE;
 870
 871         cmd.rq = rq;
 872
 873         if (blk_fs_request(rq) || rq->data_len) {
 874                 ide_init_sg_cmd(&cmd, blk_fs_request(rq) ? (rq->nr_sectors << 9)
 875                                                          : rq->data_len);
 876                 ide_map_sg(drive, &cmd);
 877         }
 878
 879         return ide_issue_pc(drive, &cmd);
 880 out_end:
 881         nsectors = rq->hard_nr_sectors;
 882
 883         if (nsectors == 0)
 884                 nsectors = 1;
 885
 886         ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
 887
 888         return ide_stopped;
 889 }
 890
 891 /*
 892  * Ioctl handling.
 893  *
 894  * Routines which queue packet commands take as a final argument a pointer to a
 895  * request_sense struct. If execution of the command results in an error with a
 896  * CHECK CONDITION status, this structure will be filled with the results of the
 897  * subsequent request sense command. The pointer can also be NULL, in which case
 898  * no sense information is returned.
 899  */
 900 static void msf_from_bcd(struct atapi_msf *msf)
 901 {
 902         msf->minute = bcd2bin(msf->minute);
 903         msf->second = bcd2bin(msf->second);
 904         msf->frame  = bcd2bin(msf->frame);
 905 }
 906
 907 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
 908 {
 909         struct cdrom_info *info = drive->driver_data;
 910         struct cdrom_device_info *cdi = &info->devinfo;
 911         unsigned char cmd[BLK_MAX_CDB];
 912
 913         ide_debug_log(IDE_DBG_FUNC, "enter");
 914
 915         memset(cmd, 0, BLK_MAX_CDB);
 916         cmd[0] = GPCMD_TEST_UNIT_READY;
 917
 918         /*
 919          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
 920          * instead of supporting the LOAD_UNLOAD opcode.
 921          */
 922         cmd[7] = cdi->sanyo_slot % 3;
 923
 924         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
 925 }
 926
 927 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
 928                                unsigned long *sectors_per_frame,
 929                                struct request_sense *sense)
 930 {
 931         struct {
 932                 __be32 lba;
 933                 __be32 blocklen;
 934         } capbuf;
 935
 936         int stat;
 937         unsigned char cmd[BLK_MAX_CDB];
 938         unsigned len = sizeof(capbuf);
 939         u32 blocklen;
 940
 941         ide_debug_log(IDE_DBG_FUNC, "enter");
 942
 943         memset(cmd, 0, BLK_MAX_CDB);
 944         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
 945
 946         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
 947                                REQ_QUIET);
 948         if (stat)
 949                 return stat;
 950
 951         /*
 952          * Sanity check the given block size
 953          */
 954         blocklen = be32_to_cpu(capbuf.blocklen);
 955         switch (blocklen) {
 956         case 512:
 957         case 1024:
 958         case 2048:
 959         case 4096:
 960                 break;
 961         default:
 962                 printk(KERN_ERR PFX "%s: weird block size %u\n",
 963                                 drive->name, blocklen);
 964                 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
 965                                 drive->name);
 966                 blocklen = 2048;
 967                 break;
 968         }
 969
 970         *capacity = 1 + be32_to_cpu(capbuf.lba);
 971         *sectors_per_frame = blocklen >> SECTOR_BITS;
 972
 973         ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
 974                                      *capacity, *sectors_per_frame);
 975
 976         return 0;
 977 }
 978
 979 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
 980                                 int format, char *buf, int buflen,
 981                                 struct request_sense *sense)
 982 {
 983         unsigned char cmd[BLK_MAX_CDB];
 984
 985         ide_debug_log(IDE_DBG_FUNC, "enter");
 986
 987         memset(cmd, 0, BLK_MAX_CDB);
 988
 989         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
 990         cmd[6] = trackno;
 991         cmd[7] = (buflen >> 8);
 992         cmd[8] = (buflen & 0xff);
 993         cmd[9] = (format << 6);
 994
 995         if (msf_flag)
 996                 cmd[1] = 2;
 997
 998         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
 999 }
1000
1001 /* Try to read the entire TOC for the disk into our internal buffer. */
1002 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1003 {
1004         int stat, ntracks, i;
1005         struct cdrom_info *info = drive->driver_data;
1006         struct cdrom_device_info *cdi = &info->devinfo;
1007         struct atapi_toc *toc = info->toc;
1008         struct {
1009                 struct atapi_toc_header hdr;
1010                 struct atapi_toc_entry  ent;
1011         } ms_tmp;
1012         long last_written;
1013         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1014
1015         ide_debug_log(IDE_DBG_FUNC, "enter");
1016
1017         if (toc == NULL) {
1018                 /* try to allocate space */
1019                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1020                 if (toc == NULL) {
1021                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1022                                         drive->name);
1023                         return -ENOMEM;
1024                 }
1025                 info->toc = toc;
1026         }
1027
1028         /*
1029          * Check to see if the existing data is still valid. If it is,
1030          * just return.
1031          */
1032         (void) cdrom_check_status(drive, sense);
1033
1034         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1035                 return 0;
1036
1037         /* try to get the total cdrom capacity and sector size */
1038         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1039                                    sense);
1040         if (stat)
1041                 toc->capacity = 0x1fffff;
1042
1043         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1044         /* save a private copy of the TOC capacity for error handling */
1045         drive->probed_capacity = toc->capacity * sectors_per_frame;
1046
1047         blk_queue_hardsect_size(drive->queue,
1048                                 sectors_per_frame << SECTOR_BITS);
1049
1050         /* first read just the header, so we know how long the TOC is */
1051         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1052                                     sizeof(struct atapi_toc_header), sense);
1053         if (stat)
1054                 return stat;
1055
1056         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1057                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1058                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1059         }
1060
1061         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1062         if (ntracks <= 0)
1063                 return -EIO;
1064         if (ntracks > MAX_TRACKS)
1065                 ntracks = MAX_TRACKS;
1066
1067         /* now read the whole schmeer */
1068         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1069                                   (char *)&toc->hdr,
1070                                    sizeof(struct atapi_toc_header) +
1071                                    (ntracks + 1) *
1072                                    sizeof(struct atapi_toc_entry), sense);
1073
1074         if (stat && toc->hdr.first_track > 1) {
1075                 /*
1076                  * Cds with CDI tracks only don't have any TOC entries, despite
1077                  * of this the returned values are
1078                  * first_track == last_track = number of CDI tracks + 1,
1079                  * so that this case is indistinguishable from the same layout
1080                  * plus an additional audio track. If we get an error for the
1081                  * regular case, we assume a CDI without additional audio
1082                  * tracks. In this case the readable TOC is empty (CDI tracks
1083                  * are not included) and only holds the Leadout entry.
1084                  *
1085                  * Heiko Eißfeldt.
1086                  */
1087                 ntracks = 0;
1088                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1089                                            (char *)&toc->hdr,
1090                                            sizeof(struct atapi_toc_header) +
1091                                            (ntracks + 1) *
1092                                            sizeof(struct atapi_toc_entry),
1093                                            sense);
1094                 if (stat)
1095                         return stat;
1096
1097                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1098                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1099                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1100                 } else {
1101                         toc->hdr.first_track = CDROM_LEADOUT;
1102                         toc->hdr.last_track = CDROM_LEADOUT;
1103                 }
1104         }
1105
1106         if (stat)
1107                 return stat;
1108
1109         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1110
1111         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1112                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1113                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1114         }
1115
1116         for (i = 0; i <= ntracks; i++) {
1117                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1118                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1119                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1120                         msf_from_bcd(&toc->ent[i].addr.msf);
1121                 }
1122                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1123                                                   toc->ent[i].addr.msf.second,
1124                                                   toc->ent[i].addr.msf.frame);
1125         }
1126
1127         if (toc->hdr.first_track != CDROM_LEADOUT) {
1128                 /* read the multisession information */
1129                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1130                                            sizeof(ms_tmp), sense);
1131                 if (stat)
1132                         return stat;
1133
1134                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1135         } else {
1136                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1137                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1138                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1139         }
1140
1141         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1142                 /* re-read multisession information using MSF format */
1143                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1144                                            sizeof(ms_tmp), sense);
1145                 if (stat)
1146                         return stat;
1147
1148                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1149                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1150                                                    ms_tmp.ent.addr.msf.second,
1151                                                    ms_tmp.ent.addr.msf.frame);
1152         }
1153
1154         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1155
1156         /* now try to get the total cdrom capacity */
1157         stat = cdrom_get_last_written(cdi, &last_written);
1158         if (!stat && (last_written > toc->capacity)) {
1159                 toc->capacity = last_written;
1160                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1161                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1162         }
1163
1164         /* Remember that we've read this stuff. */
1165         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1166
1167         return 0;
1168 }
1169
1170 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1171 {
1172         struct cdrom_info *info = drive->driver_data;
1173         struct cdrom_device_info *cdi = &info->devinfo;
1174         struct packet_command cgc;
1175         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1176
1177         ide_debug_log(IDE_DBG_FUNC, "enter");
1178
1179         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1180                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1181
1182         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1183         do {
1184                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1185                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1186                 if (!stat)
1187                         break;
1188         } while (--attempts);
1189         return stat;
1190 }
1191
1192 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1193 {
1194         struct cdrom_info *cd = drive->driver_data;
1195         u16 curspeed, maxspeed;
1196
1197         ide_debug_log(IDE_DBG_FUNC, "enter");
1198
1199         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1200                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1201                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1202         } else {
1203                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1204                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1205         }
1206
1207         ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1208                                      curspeed, maxspeed);
1209
1210         cd->current_speed = (curspeed + (176/2)) / 176;
1211         cd->max_speed = (maxspeed + (176/2)) / 176;
1212 }
1213
1214 #define IDE_CD_CAPABILITIES \
1215         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1216          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1217          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1218          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1219          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1220
1221 static struct cdrom_device_ops ide_cdrom_dops = {
1222         .open                   = ide_cdrom_open_real,
1223         .release                = ide_cdrom_release_real,
1224         .drive_status           = ide_cdrom_drive_status,
1225         .media_changed          = ide_cdrom_check_media_change_real,
1226         .tray_move              = ide_cdrom_tray_move,
1227         .lock_door              = ide_cdrom_lock_door,
1228         .select_speed           = ide_cdrom_select_speed,
1229         .get_last_session       = ide_cdrom_get_last_session,
1230         .get_mcn                = ide_cdrom_get_mcn,
1231         .reset                  = ide_cdrom_reset,
1232         .audio_ioctl            = ide_cdrom_audio_ioctl,
1233         .capability             = IDE_CD_CAPABILITIES,
1234         .generic_packet         = ide_cdrom_packet,
1235 };
1236
1237 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1238 {
1239         struct cdrom_info *info = drive->driver_data;
1240         struct cdrom_device_info *devinfo = &info->devinfo;
1241
1242         ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1243
1244         devinfo->ops = &ide_cdrom_dops;
1245         devinfo->speed = info->current_speed;
1246         devinfo->capacity = nslots;
1247         devinfo->handle = drive;
1248         strcpy(devinfo->name, drive->name);
1249
1250         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1251                 devinfo->mask |= CDC_SELECT_SPEED;
1252
1253         devinfo->disk = info->disk;
1254         return register_cdrom(devinfo);
1255 }
1256
1257 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1258 {
1259         struct cdrom_info *cd = drive->driver_data;
1260         struct cdrom_device_info *cdi = &cd->devinfo;
1261         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1262         mechtype_t mechtype;
1263         int nslots = 1;
1264
1265         ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1266                                      drive->media, drive->atapi_flags);
1267
1268         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1269                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1270                      CDC_MO_DRIVE | CDC_RAM);
1271
1272         if (drive->media == ide_optical) {
1273                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1274                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1275                                 drive->name);
1276                 return nslots;
1277         }
1278
1279         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1280                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1281                 cdi->mask &= ~CDC_PLAY_AUDIO;
1282                 return nslots;
1283         }
1284
1285         /*
1286          * We have to cheat a little here. the packet will eventually be queued
1287          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1288          * Since this device hasn't been registered with the Uniform layer yet,
1289          * it can't do this. Same goes for cdi->ops.
1290          */
1291         cdi->handle = drive;
1292         cdi->ops = &ide_cdrom_dops;
1293
1294         if (ide_cdrom_get_capabilities(drive, buf))
1295                 return 0;
1296
1297         if ((buf[8 + 6] & 0x01) == 0)
1298                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1299         if (buf[8 + 6] & 0x08)
1300                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1301         if (buf[8 + 3] & 0x01)
1302                 cdi->mask &= ~CDC_CD_R;
1303         if (buf[8 + 3] & 0x02)
1304                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1305         if (buf[8 + 2] & 0x38)
1306                 cdi->mask &= ~CDC_DVD;
1307         if (buf[8 + 3] & 0x20)
1308                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1309         if (buf[8 + 3] & 0x10)
1310                 cdi->mask &= ~CDC_DVD_R;
1311         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1312                 cdi->mask &= ~CDC_PLAY_AUDIO;
1313
1314         mechtype = buf[8 + 6] >> 5;
1315         if (mechtype == mechtype_caddy ||
1316             mechtype == mechtype_popup ||
1317             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1318                 cdi->mask |= CDC_CLOSE_TRAY;
1319
1320         if (cdi->sanyo_slot > 0) {
1321                 cdi->mask &= ~CDC_SELECT_DISC;
1322                 nslots = 3;
1323         } else if (mechtype == mechtype_individual_changer ||
1324                    mechtype == mechtype_cartridge_changer) {
1325                 nslots = cdrom_number_of_slots(cdi);
1326                 if (nslots > 1)
1327                         cdi->mask &= ~CDC_SELECT_DISC;
1328         }
1329
1330         ide_cdrom_update_speed(drive, buf);
1331
1332         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1333
1334         /* don't print speed if the drive reported 0 */
1335         if (cd->max_speed)
1336                 printk(KERN_CONT " %dX", cd->max_speed);
1337
1338         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1339
1340         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1341                 printk(KERN_CONT " DVD%s%s",
1342                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1343                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1344
1345         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1346                 printk(KERN_CONT " CD%s%s",
1347                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1348                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1349
1350         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1351                 printk(KERN_CONT " changer w/%d slots", nslots);
1352         else
1353                 printk(KERN_CONT " drive");
1354
1355         printk(KERN_CONT ", %dkB Cache\n",
1356                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1357
1358         return nslots;
1359 }
1360
1361 /* standard prep_rq_fn that builds 10 byte cmds */
1362 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1363 {
1364         int hard_sect = queue_hardsect_size(q);
1365         long block = (long)rq->hard_sector / (hard_sect >> 9);
1366         unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1367
1368         memset(rq->cmd, 0, BLK_MAX_CDB);
1369
1370         if (rq_data_dir(rq) == READ)
1371                 rq->cmd[0] = GPCMD_READ_10;
1372         else
1373                 rq->cmd[0] = GPCMD_WRITE_10;
1374
1375         /*
1376          * fill in lba
1377          */
1378         rq->cmd[2] = (block >> 24) & 0xff;
1379         rq->cmd[3] = (block >> 16) & 0xff;
1380         rq->cmd[4] = (block >>  8) & 0xff;
1381         rq->cmd[5] = block & 0xff;
1382
1383         /*
1384          * and transfer length
1385          */
1386         rq->cmd[7] = (blocks >> 8) & 0xff;
1387         rq->cmd[8] = blocks & 0xff;
1388         rq->cmd_len = 10;
1389         return BLKPREP_OK;
1390 }
1391
1392 /*
1393  * Most of the SCSI commands are supported directly by ATAPI devices.
1394  * This transform handles the few exceptions.
1395  */
1396 static int ide_cdrom_prep_pc(struct request *rq)
1397 {
1398         u8 *c = rq->cmd;
1399
1400         /* transform 6-byte read/write commands to the 10-byte version */
1401         if (c[0] == READ_6 || c[0] == WRITE_6) {
1402                 c[8] = c[4];
1403                 c[5] = c[3];
1404                 c[4] = c[2];
1405                 c[3] = c[1] & 0x1f;
1406                 c[2] = 0;
1407                 c[1] &= 0xe0;
1408                 c[0] += (READ_10 - READ_6);
1409                 rq->cmd_len = 10;
1410                 return BLKPREP_OK;
1411         }
1412
1413         /*
1414          * it's silly to pretend we understand 6-byte sense commands, just
1415          * reject with ILLEGAL_REQUEST and the caller should take the
1416          * appropriate action
1417          */
1418         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1419                 rq->errors = ILLEGAL_REQUEST;
1420                 return BLKPREP_KILL;
1421         }
1422
1423         return BLKPREP_OK;
1424 }
1425
1426 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1427 {
1428         if (blk_fs_request(rq))
1429                 return ide_cdrom_prep_fs(q, rq);
1430         else if (blk_pc_request(rq))
1431                 return ide_cdrom_prep_pc(rq);
1432
1433         return 0;
1434 }
1435
1436 struct cd_list_entry {
1437         const char      *id_model;
1438         const char      *id_firmware;
1439         unsigned int    cd_flags;
1440 };
1441
1442 #ifdef CONFIG_IDE_PROC_FS
1443 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1444 {
1445         unsigned long capacity, sectors_per_frame;
1446
1447         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1448                 return 0;
1449
1450         return capacity * sectors_per_frame;
1451 }
1452
1453 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1454                                         int count, int *eof, void *data)
1455 {
1456         ide_drive_t *drive = data;
1457         int len;
1458
1459         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1460         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1461 }
1462
1463 static ide_proc_entry_t idecd_proc[] = {
1464         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1465         { NULL, 0, NULL, NULL }
1466 };
1467
1468 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1469 {
1470         return idecd_proc;
1471 }
1472
1473 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1474 {
1475         return NULL;
1476 }
1477 #endif
1478
1479 static const struct cd_list_entry ide_cd_quirks_list[] = {
1480         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1481         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1482         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1483         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1484                                              IDE_AFLAG_PRE_ATAPI12,          },
1485         /* Vertos 300, some versions of this drive like to talk BCD. */
1486         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1487         /* Vertos 600 ESD. */
1488         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1489         /*
1490          * Sanyo 3 CD changer uses a non-standard command for CD changing
1491          * (by default standard ATAPI support for CD changers is used).
1492          */
1493         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1494         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1495         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1496         /* Stingray 8X CD-ROM. */
1497         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1498         /*
1499          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1500          * mode sense page capabilities size, but older drives break.
1501          */
1502         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1503         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1504         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1505         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1506         /*
1507          * Some drives used by Apple don't advertise audio play
1508          * but they do support reading TOC & audio datas.
1509          */
1510         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1511         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1512         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1513         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1514         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1515         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1516         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1517         { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1518         { NULL, NULL, 0 }
1519 };
1520
1521 static unsigned int ide_cd_flags(u16 *id)
1522 {
1523         const struct cd_list_entry *cle = ide_cd_quirks_list;
1524
1525         while (cle->id_model) {
1526                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1527                     (cle->id_firmware == NULL ||
1528                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1529                         return cle->cd_flags;
1530                 cle++;
1531         }
1532
1533         return 0;
1534 }
1535
1536 static int ide_cdrom_setup(ide_drive_t *drive)
1537 {
1538         struct cdrom_info *cd = drive->driver_data;
1539         struct cdrom_device_info *cdi = &cd->devinfo;
1540         struct request_queue *q = drive->queue;
1541         u16 *id = drive->id;
1542         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1543         int nslots;
1544
1545         ide_debug_log(IDE_DBG_PROBE, "enter");
1546
1547         blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1548         blk_queue_dma_alignment(q, 31);
1549         blk_queue_update_dma_pad(q, 15);
1550
1551         q->unplug_delay = max((1 * HZ) / 1000, 1);
1552
1553         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1554         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1555
1556         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1557             fw_rev[4] == '1' && fw_rev[6] <= '2')
1558                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1559                                      IDE_AFLAG_TOCADDR_AS_BCD);
1560         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1561                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1562                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1563         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1564                 /* 3 => use CD in slot 0 */
1565                 cdi->sanyo_slot = 3;
1566
1567         nslots = ide_cdrom_probe_capabilities(drive);
1568
1569         blk_queue_hardsect_size(q, CD_FRAMESIZE);
1570
1571         if (ide_cdrom_register(drive, nslots)) {
1572                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1573                                 " cdrom driver.\n", drive->name, __func__);
1574                 cd->devinfo.handle = NULL;
1575                 return 1;
1576         }
1577
1578         ide_proc_register_driver(drive, cd->driver);
1579         return 0;
1580 }
1581
1582 static void ide_cd_remove(ide_drive_t *drive)
1583 {
1584         struct cdrom_info *info = drive->driver_data;
1585
1586         ide_debug_log(IDE_DBG_FUNC, "enter");
1587
1588         ide_proc_unregister_driver(drive, info->driver);
1589         device_del(&info->dev);
1590         del_gendisk(info->disk);
1591
1592         mutex_lock(&idecd_ref_mutex);
1593         put_device(&info->dev);
1594         mutex_unlock(&idecd_ref_mutex);
1595 }
1596
1597 static void ide_cd_release(struct device *dev)
1598 {
1599         struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1600         struct cdrom_device_info *devinfo = &info->devinfo;
1601         ide_drive_t *drive = info->drive;
1602         struct gendisk *g = info->disk;
1603
1604         ide_debug_log(IDE_DBG_FUNC, "enter");
1605
1606         kfree(info->toc);
1607         if (devinfo->handle == drive)
1608                 unregister_cdrom(devinfo);
1609         drive->driver_data = NULL;
1610         blk_queue_prep_rq(drive->queue, NULL);
1611         g->private_data = NULL;
1612         put_disk(g);
1613         kfree(info);
1614 }
1615
1616 static int ide_cd_probe(ide_drive_t *);
1617
1618 static struct ide_driver ide_cdrom_driver = {
1619         .gen_driver = {
1620                 .owner          = THIS_MODULE,
1621                 .name           = "ide-cdrom",
1622                 .bus            = &ide_bus_type,
1623         },
1624         .probe                  = ide_cd_probe,
1625         .remove                 = ide_cd_remove,
1626         .version                = IDECD_VERSION,
1627         .do_request             = ide_cd_do_request,
1628 #ifdef CONFIG_IDE_PROC_FS
1629         .proc_entries           = ide_cd_proc_entries,
1630         .proc_devsets           = ide_cd_proc_devsets,
1631 #endif
1632 };
1633
1634 static int idecd_open(struct block_device *bdev, fmode_t mode)
1635 {
1636         struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1637         int rc = -ENOMEM;
1638
1639         if (!info)
1640                 return -ENXIO;
1641
1642         rc = cdrom_open(&info->devinfo, bdev, mode);
1643
1644         if (rc < 0)
1645                 ide_cd_put(info);
1646
1647         return rc;
1648 }
1649
1650 static int idecd_release(struct gendisk *disk, fmode_t mode)
1651 {
1652         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1653
1654         cdrom_release(&info->devinfo, mode);
1655
1656         ide_cd_put(info);
1657
1658         return 0;
1659 }
1660
1661 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1662 {
1663         struct packet_command cgc;
1664         char buffer[16];
1665         int stat;
1666         char spindown;
1667
1668         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1669                 return -EFAULT;
1670
1671         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1672
1673         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1674         if (stat)
1675                 return stat;
1676
1677         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1678         return cdrom_mode_select(cdi, &cgc);
1679 }
1680
1681 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1682 {
1683         struct packet_command cgc;
1684         char buffer[16];
1685         int stat;
1686         char spindown;
1687
1688         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1689
1690         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1691         if (stat)
1692                 return stat;
1693
1694         spindown = buffer[11] & 0x0f;
1695         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1696                 return -EFAULT;
1697         return 0;
1698 }
1699
1700 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1701                         unsigned int cmd, unsigned long arg)
1702 {
1703         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1704         int err;
1705
1706         switch (cmd) {
1707         case CDROMSETSPINDOWN:
1708                 return idecd_set_spindown(&info->devinfo, arg);
1709         case CDROMGETSPINDOWN:
1710                 return idecd_get_spindown(&info->devinfo, arg);
1711         default:
1712                 break;
1713         }
1714
1715         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1716         if (err == -EINVAL)
1717                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1718
1719         return err;
1720 }
1721
1722 static int idecd_media_changed(struct gendisk *disk)
1723 {
1724         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1725         return cdrom_media_changed(&info->devinfo);
1726 }
1727
1728 static int idecd_revalidate_disk(struct gendisk *disk)
1729 {
1730         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1731         struct request_sense sense;
1732
1733         ide_cd_read_toc(info->drive, &sense);
1734
1735         return  0;
1736 }
1737
1738 static struct block_device_operations idecd_ops = {
1739         .owner                  = THIS_MODULE,
1740         .open                   = idecd_open,
1741         .release                = idecd_release,
1742         .locked_ioctl           = idecd_ioctl,
1743         .media_changed          = idecd_media_changed,
1744         .revalidate_disk        = idecd_revalidate_disk
1745 };
1746
1747 /* module options */
1748 static unsigned long debug_mask;
1749 module_param(debug_mask, ulong, 0644);
1750
1751 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1752
1753 static int ide_cd_probe(ide_drive_t *drive)
1754 {
1755         struct cdrom_info *info;
1756         struct gendisk *g;
1757         struct request_sense sense;
1758
1759         ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1760                                      drive->driver_req, drive->media);
1761
1762         if (!strstr("ide-cdrom", drive->driver_req))
1763                 goto failed;
1764
1765         if (drive->media != ide_cdrom && drive->media != ide_optical)
1766                 goto failed;
1767
1768         drive->debug_mask = debug_mask;
1769         drive->irq_handler = cdrom_newpc_intr;
1770
1771         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1772         if (info == NULL) {
1773                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1774                                 drive->name);
1775                 goto failed;
1776         }
1777
1778         g = alloc_disk(1 << PARTN_BITS);
1779         if (!g)
1780                 goto out_free_cd;
1781
1782         ide_init_disk(g, drive);
1783
1784         info->dev.parent = &drive->gendev;
1785         info->dev.release = ide_cd_release;
1786         dev_set_name(&info->dev, dev_name(&drive->gendev));
1787
1788         if (device_register(&info->dev))
1789                 goto out_free_disk;
1790
1791         info->drive = drive;
1792         info->driver = &ide_cdrom_driver;
1793         info->disk = g;
1794
1795         g->private_data = &info->driver;
1796
1797         drive->driver_data = info;
1798
1799         g->minors = 1;
1800         g->driverfs_dev = &drive->gendev;
1801         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1802         if (ide_cdrom_setup(drive)) {
1803                 put_device(&info->dev);
1804                 goto failed;
1805         }
1806
1807         ide_cd_read_toc(drive, &sense);
1808         g->fops = &idecd_ops;
1809         g->flags |= GENHD_FL_REMOVABLE;
1810         add_disk(g);
1811         return 0;
1812
1813 out_free_disk:
1814         put_disk(g);
1815 out_free_cd:
1816         kfree(info);
1817 failed:
1818         return -ENODEV;
1819 }
1820
1821 static void __exit ide_cdrom_exit(void)
1822 {
1823         driver_unregister(&ide_cdrom_driver.gen_driver);
1824 }
1825
1826 static int __init ide_cdrom_init(void)
1827 {
1828         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1829         return driver_register(&ide_cdrom_driver.gen_driver);
1830 }
1831
1832 MODULE_ALIAS("ide:*m-cdrom*");
1833 MODULE_ALIAS("ide-cd");
1834 module_init(ide_cdrom_init);
1835 module_exit(ide_cdrom_exit);
1836 MODULE_LICENSE("GPL");