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/seq_file.h>
  34 #include <linux/smp_lock.h>
  35 #include <linux/slab.h>
  36 #include <linux/interrupt.h>
  37 #include <linux/errno.h>
  38 #include <linux/cdrom.h>
  39 #include <linux/ide.h>
  40 #include <linux/completion.h>
  41 #include <linux/mutex.h>
  42 #include <linux/bcd.h>
  43
  44 /* For SCSI -> ATAPI command conversion */
  45 #include <scsi/scsi.h>
  46
  47 #include <linux/irq.h>
  48 #include <linux/io.h>
  49 #include <asm/byteorder.h>
  50 #include <linux/uaccess.h>
  51 #include <asm/unaligned.h>
  52
  53 #include "ide-cd.h"
  54
  55 static DEFINE_MUTEX(idecd_ref_mutex);
  56
  57 static void ide_cd_release(struct device *);
  58
  59 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
  60 {
  61         struct cdrom_info *cd = NULL;
  62
  63         mutex_lock(&idecd_ref_mutex);
  64         cd = ide_drv_g(disk, cdrom_info);
  65         if (cd) {
  66                 if (ide_device_get(cd->drive))
  67                         cd = NULL;
  68                 else
  69                         get_device(&cd->dev);
  70
  71         }
  72         mutex_unlock(&idecd_ref_mutex);
  73         return cd;
  74 }
  75
  76 static void ide_cd_put(struct cdrom_info *cd)
  77 {
  78         ide_drive_t *drive = cd->drive;
  79
  80         mutex_lock(&idecd_ref_mutex);
  81         put_device(&cd->dev);
  82         ide_device_put(drive);
  83         mutex_unlock(&idecd_ref_mutex);
  84 }
  85
  86 /*
  87  * Generic packet command support and error handling routines.
  88  */
  89
  90 /* Mark that we've seen a media change and invalidate our internal buffers. */
  91 static void cdrom_saw_media_change(ide_drive_t *drive)
  92 {
  93         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
  94         drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
  95 }
  96
  97 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq)
  98 {
  99         struct request_sense *sense = &drive->sense_data;
 100         int log = 0;
 101
 102         if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
 103                 return 0;
 104
 105         ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
 106
 107         switch (sense->sense_key) {
 108         case NO_SENSE:
 109         case RECOVERED_ERROR:
 110                 break;
 111         case NOT_READY:
 112                 /*
 113                  * don't care about tray state messages for e.g. capacity
 114                  * commands or in-progress or becoming ready
 115                  */
 116                 if (sense->asc == 0x3a || sense->asc == 0x04)
 117                         break;
 118                 log = 1;
 119                 break;
 120         case ILLEGAL_REQUEST:
 121                 /*
 122                  * don't log START_STOP unit with LoEj set, since we cannot
 123                  * reliably check if drive can auto-close
 124                  */
 125                 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
 126                         break;
 127                 log = 1;
 128                 break;
 129         case UNIT_ATTENTION:
 130                 /*
 131                  * Make good and sure we've seen this potential media change.
 132                  * Some drives (i.e. Creative) fail to present the correct sense
 133                  * key in the error register.
 134                  */
 135                 cdrom_saw_media_change(drive);
 136                 break;
 137         default:
 138                 log = 1;
 139                 break;
 140         }
 141         return log;
 142 }
 143
 144 static void cdrom_analyze_sense_data(ide_drive_t *drive,
 145                                      struct request *failed_command)
 146 {
 147         struct request_sense *sense = &drive->sense_data;
 148         struct cdrom_info *info = drive->driver_data;
 149         unsigned long sector;
 150         unsigned long bio_sectors;
 151
 152         ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
 153                                      sense->error_code, sense->sense_key);
 154
 155         if (failed_command)
 156                 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
 157                                              failed_command->cmd[0]);
 158
 159         if (!cdrom_log_sense(drive, failed_command))
 160                 return;
 161
 162         /*
 163          * If a read toc is executed for a CD-R or CD-RW medium where the first
 164          * toc has not been recorded yet, it will fail with 05/24/00 (which is a
 165          * confusing error)
 166          */
 167         if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
 168                 if (sense->sense_key == 0x05 && sense->asc == 0x24)
 169                         return;
 170
 171         /* current error */
 172         if (sense->error_code == 0x70) {
 173                 switch (sense->sense_key) {
 174                 case MEDIUM_ERROR:
 175                 case VOLUME_OVERFLOW:
 176                 case ILLEGAL_REQUEST:
 177                         if (!sense->valid)
 178                                 break;
 179                         if (failed_command == NULL ||
 180                             failed_command->cmd_type != REQ_TYPE_FS)
 181                                 break;
 182                         sector = (sense->information[0] << 24) |
 183                                  (sense->information[1] << 16) |
 184                                  (sense->information[2] <<  8) |
 185                                  (sense->information[3]);
 186
 187                         if (queue_logical_block_size(drive->queue) == 2048)
 188                                 /* device sector size is 2K */
 189                                 sector <<= 2;
 190
 191                         bio_sectors = max(bio_sectors(failed_command->bio), 4U);
 192                         sector &= ~(bio_sectors - 1);
 193
 194                         /*
 195                          * The SCSI specification allows for the value
 196                          * returned by READ CAPACITY to be up to 75 2K
 197                          * sectors past the last readable block.
 198                          * Therefore, if we hit a medium error within the
 199                          * last 75 2K sectors, we decrease the saved size
 200                          * value.
 201                          */
 202                         if (sector < get_capacity(info->disk) &&
 203                             drive->probed_capacity - sector < 4 * 75)
 204                                 set_capacity(info->disk, sector);
 205                 }
 206         }
 207
 208         ide_cd_log_error(drive->name, failed_command, sense);
 209 }
 210
 211 static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
 212 {
 213         /*
 214          * For REQ_TYPE_SENSE, "rq->special" points to the original
 215          * failed request.  Also, the sense data should be read
 216          * directly from rq which might be different from the original
 217          * sense buffer if it got copied during mapping.
 218          */
 219         struct request *failed = (struct request *)rq->special;
 220         void *sense = bio_data(rq->bio);
 221
 222         if (failed) {
 223                 if (failed->sense) {
 224                         /*
 225                          * Sense is always read into drive->sense_data.
 226                          * Copy back if the failed request has its
 227                          * sense pointer set.
 228                          */
 229                         memcpy(failed->sense, sense, 18);
 230                         failed->sense_len = rq->sense_len;
 231                 }
 232                 cdrom_analyze_sense_data(drive, failed);
 233
 234                 if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
 235                         BUG();
 236         } else
 237                 cdrom_analyze_sense_data(drive, NULL);
 238 }
 239
 240
 241 /*
 242  * Allow the drive 5 seconds to recover; some devices will return NOT_READY
 243  * while flushing data from cache.
 244  *
 245  * returns: 0 failed (write timeout expired)
 246  *          1 success
 247  */
 248 static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
 249 {
 250
 251         struct cdrom_info *info = drive->driver_data;
 252
 253         if (!rq->errors)
 254                 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
 255
 256         rq->errors = 1;
 257
 258         if (time_after(jiffies, info->write_timeout))
 259                 return 0;
 260         else {
 261                 struct request_queue *q = drive->queue;
 262                 unsigned long flags;
 263
 264                 /*
 265                  * take a breather relying on the unplug timer to kick us again
 266                  */
 267
 268                 spin_lock_irqsave(q->queue_lock, flags);
 269                 blk_plug_device(q);
 270                 spin_unlock_irqrestore(q->queue_lock, flags);
 271
 272                 return 1;
 273         }
 274 }
 275
 276 /**
 277  * Returns:
 278  * 0: if the request should be continued.
 279  * 1: if the request will be going through error recovery.
 280  * 2: if the request should be ended.
 281  */
 282 static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 283 {
 284         ide_hwif_t *hwif = drive->hwif;
 285         struct request *rq = hwif->rq;
 286         int err, sense_key, do_end_request = 0;
 287
 288         /* get the IDE error register */
 289         err = ide_read_error(drive);
 290         sense_key = err >> 4;
 291
 292         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
 293                                   "stat 0x%x",
 294                                   rq->cmd[0], rq->cmd_type, err, stat);
 295
 296         if (rq->cmd_type == REQ_TYPE_SENSE) {
 297                 /*
 298                  * We got an error trying to get sense info from the drive
 299                  * (probably while trying to recover from a former error).
 300                  * Just give up.
 301                  */
 302                 rq->cmd_flags |= REQ_FAILED;
 303                 return 2;
 304         }
 305
 306         /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
 307         if (rq->cmd_type == REQ_TYPE_BLOCK_PC && !rq->errors)
 308                 rq->errors = SAM_STAT_CHECK_CONDITION;
 309
 310         if (blk_noretry_request(rq))
 311                 do_end_request = 1;
 312
 313         switch (sense_key) {
 314         case NOT_READY:
 315                 if (rq->cmd_type == REQ_TYPE_FS && rq_data_dir(rq) == WRITE) {
 316                         if (ide_cd_breathe(drive, rq))
 317                                 return 1;
 318                 } else {
 319                         cdrom_saw_media_change(drive);
 320
 321                         if (rq->cmd_type == REQ_TYPE_FS &&
 322                             !(rq->cmd_flags & REQ_QUIET))
 323                                 printk(KERN_ERR PFX "%s: tray open\n",
 324                                         drive->name);
 325                 }
 326                 do_end_request = 1;
 327                 break;
 328         case UNIT_ATTENTION:
 329                 cdrom_saw_media_change(drive);
 330
 331                 if (rq->cmd_type != REQ_TYPE_FS)
 332                         return 0;
 333
 334                 /*
 335                  * Arrange to retry the request but be sure to give up if we've
 336                  * retried too many times.
 337                  */
 338                 if (++rq->errors > ERROR_MAX)
 339                         do_end_request = 1;
 340                 break;
 341         case ILLEGAL_REQUEST:
 342                 /*
 343                  * Don't print error message for this condition -- SFF8090i
 344                  * indicates that 5/24/00 is the correct response to a request
 345                  * to close the tray if the drive doesn't have that capability.
 346                  *
 347                  * cdrom_log_sense() knows this!
 348                  */
 349                 if (rq->cmd[0] == GPCMD_START_STOP_UNIT)
 350                         break;
 351                 /* fall-through */
 352         case DATA_PROTECT:
 353                 /*
 354                  * No point in retrying after an illegal request or data
 355                  * protect error.
 356                  */
 357                 if (!(rq->cmd_flags & REQ_QUIET))
 358                         ide_dump_status(drive, "command error", stat);
 359                 do_end_request = 1;
 360                 break;
 361         case MEDIUM_ERROR:
 362                 /*
 363                  * No point in re-trying a zillion times on a bad sector.
 364                  * If we got here the error is not correctable.
 365                  */
 366                 if (!(rq->cmd_flags & REQ_QUIET))
 367                         ide_dump_status(drive, "media error "
 368                                         "(bad sector)", stat);
 369                 do_end_request = 1;
 370                 break;
 371         case BLANK_CHECK:
 372                 /* disk appears blank? */
 373                 if (!(rq->cmd_flags & REQ_QUIET))
 374                         ide_dump_status(drive, "media error (blank)",
 375                                         stat);
 376                 do_end_request = 1;
 377                 break;
 378         default:
 379                 if (rq->cmd_type != REQ_TYPE_FS)
 380                         break;
 381                 if (err & ~ATA_ABORTED) {
 382                         /* go to the default handler for other errors */
 383                         ide_error(drive, "cdrom_decode_status", stat);
 384                         return 1;
 385                 } else if (++rq->errors > ERROR_MAX)
 386                         /* we've racked up too many retries, abort */
 387                         do_end_request = 1;
 388         }
 389
 390         if (rq->cmd_type != REQ_TYPE_FS) {
 391                 rq->cmd_flags |= REQ_FAILED;
 392                 do_end_request = 1;
 393         }
 394
 395         /*
 396          * End a request through request sense analysis when we have sense data.
 397          * We need this in order to perform end of media processing.
 398          */
 399         if (do_end_request)
 400                 goto end_request;
 401
 402         /* if we got a CHECK_CONDITION status, queue a request sense command */
 403         if (stat & ATA_ERR)
 404                 return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
 405         return 1;
 406
 407 end_request:
 408         if (stat & ATA_ERR) {
 409                 hwif->rq = NULL;
 410                 return ide_queue_sense_rq(drive, rq) ? 2 : 1;
 411         } else
 412                 return 2;
 413 }
 414
 415 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
 416 {
 417         struct request *rq = cmd->rq;
 418
 419         ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
 420
 421         /*
 422          * Some of the trailing request sense fields are optional,
 423          * and some drives don't send them.  Sigh.
 424          */
 425         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 426             cmd->nleft > 0 && cmd->nleft <= 5)
 427                 cmd->nleft = 0;
 428 }
 429
 430 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 431                     int write, void *buffer, unsigned *bufflen,
 432                     struct request_sense *sense, int timeout,
 433                     unsigned int cmd_flags)
 434 {
 435         struct cdrom_info *info = drive->driver_data;
 436         struct request_sense local_sense;
 437         int retries = 10;
 438         unsigned int flags = 0;
 439
 440         if (!sense)
 441                 sense = &local_sense;
 442
 443         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
 444                                   "cmd_flags: 0x%x",
 445                                   cmd[0], write, timeout, cmd_flags);
 446
 447         /* start of retry loop */
 448         do {
 449                 struct request *rq;
 450                 int error;
 451
 452                 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
 453
 454                 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
 455                 rq->cmd_type = REQ_TYPE_ATA_PC;
 456                 rq->sense = sense;
 457                 rq->cmd_flags |= cmd_flags;
 458                 rq->timeout = timeout;
 459                 if (buffer) {
 460                         error = blk_rq_map_kern(drive->queue, rq, buffer,
 461                                                 *bufflen, GFP_NOIO);
 462                         if (error) {
 463                                 blk_put_request(rq);
 464                                 return error;
 465                         }
 466                 }
 467
 468                 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 469
 470                 if (buffer)
 471                         *bufflen = rq->resid_len;
 472
 473                 flags = rq->cmd_flags;
 474                 blk_put_request(rq);
 475
 476                 /*
 477                  * FIXME: we should probably abort/retry or something in case of
 478                  * failure.
 479                  */
 480                 if (flags & REQ_FAILED) {
 481                         /*
 482                          * The request failed.  Retry if it was due to a unit
 483                          * attention status (usually means media was changed).
 484                          */
 485                         struct request_sense *reqbuf = sense;
 486
 487                         if (reqbuf->sense_key == UNIT_ATTENTION)
 488                                 cdrom_saw_media_change(drive);
 489                         else if (reqbuf->sense_key == NOT_READY &&
 490                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 491                                 /*
 492                                  * The drive is in the process of loading
 493                                  * a disk.  Retry, but wait a little to give
 494                                  * the drive time to complete the load.
 495                                  */
 496                                 ssleep(2);
 497                         } else {
 498                                 /* otherwise, don't retry */
 499                                 retries = 0;
 500                         }
 501                         --retries;
 502                 }
 503
 504                 /* end of retry loop */
 505         } while ((flags & REQ_FAILED) && retries >= 0);
 506
 507         /* return an error if the command failed */
 508         return (flags & REQ_FAILED) ? -EIO : 0;
 509 }
 510
 511 /*
 512  * returns true if rq has been completed
 513  */
 514 static bool ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 515 {
 516         unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
 517
 518         if (cmd->tf_flags & IDE_TFLAG_WRITE)
 519                 nr_bytes -= cmd->last_xfer_len;
 520
 521         if (nr_bytes > 0) {
 522                 ide_complete_rq(drive, 0, nr_bytes);
 523                 return true;
 524         }
 525
 526         return false;
 527 }
 528
 529 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 530 {
 531         ide_hwif_t *hwif = drive->hwif;
 532         struct ide_cmd *cmd = &hwif->cmd;
 533         struct request *rq = hwif->rq;
 534         ide_expiry_t *expiry = NULL;
 535         int dma_error = 0, dma, thislen, uptodate = 0;
 536         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
 537         int sense = (rq->cmd_type == REQ_TYPE_SENSE);
 538         unsigned int timeout;
 539         u16 len;
 540         u8 ireason, stat;
 541
 542         ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
 543
 544         /* check for errors */
 545         dma = drive->dma;
 546         if (dma) {
 547                 drive->dma = 0;
 548                 drive->waiting_for_dma = 0;
 549                 dma_error = hwif->dma_ops->dma_end(drive);
 550                 ide_dma_unmap_sg(drive, cmd);
 551                 if (dma_error) {
 552                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 553                                         write ? "write" : "read");
 554                         ide_dma_off(drive);
 555                 }
 556         }
 557
 558         /* check status */
 559         stat = hwif->tp_ops->read_status(hwif);
 560
 561         if (!OK_STAT(stat, 0, BAD_R_STAT)) {
 562                 rc = cdrom_decode_status(drive, stat);
 563                 if (rc) {
 564                         if (rc == 2)
 565                                 goto out_end;
 566                         return ide_stopped;
 567                 }
 568         }
 569
 570         /* using dma, transfer is complete now */
 571         if (dma) {
 572                 if (dma_error)
 573                         return ide_error(drive, "dma error", stat);
 574                 uptodate = 1;
 575                 goto out_end;
 576         }
 577
 578         ide_read_bcount_and_ireason(drive, &len, &ireason);
 579
 580         thislen = (rq->cmd_type == REQ_TYPE_FS) ? len : cmd->nleft;
 581         if (thislen > len)
 582                 thislen = len;
 583
 584         ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
 585                                   stat, thislen);
 586
 587         /* If DRQ is clear, the command has completed. */
 588         if ((stat & ATA_DRQ) == 0) {
 589                 if (rq->cmd_type == REQ_TYPE_FS) {
 590                         /*
 591                          * If we're not done reading/writing, complain.
 592                          * Otherwise, complete the command normally.
 593                          */
 594                         uptodate = 1;
 595                         if (cmd->nleft > 0) {
 596                                 printk(KERN_ERR PFX "%s: %s: data underrun "
 597                                         "(%u bytes)\n", drive->name, __func__,
 598                                         cmd->nleft);
 599                                 if (!write)
 600                                         rq->cmd_flags |= REQ_FAILED;
 601                                 uptodate = 0;
 602                         }
 603                 } else if (rq->cmd_type != REQ_TYPE_BLOCK_PC) {
 604                         ide_cd_request_sense_fixup(drive, cmd);
 605
 606                         uptodate = cmd->nleft ? 0 : 1;
 607
 608                         /*
 609                          * suck out the remaining bytes from the drive in an
 610                          * attempt to complete the data xfer. (see BZ#13399)
 611                          */
 612                         if (!(stat & ATA_ERR) && !uptodate && thislen) {
 613                                 ide_pio_bytes(drive, cmd, write, thislen);
 614                                 uptodate = cmd->nleft ? 0 : 1;
 615                         }
 616
 617                         if (!uptodate)
 618                                 rq->cmd_flags |= REQ_FAILED;
 619                 }
 620                 goto out_end;
 621         }
 622
 623         rc = ide_check_ireason(drive, rq, len, ireason, write);
 624         if (rc)
 625                 goto out_end;
 626
 627         cmd->last_xfer_len = 0;
 628
 629         ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
 630                                   "ireason: 0x%x",
 631                                   rq->cmd_type, ireason);
 632
 633         /* transfer data */
 634         while (thislen > 0) {
 635                 int blen = min_t(int, thislen, cmd->nleft);
 636
 637                 if (cmd->nleft == 0)
 638                         break;
 639
 640                 ide_pio_bytes(drive, cmd, write, blen);
 641                 cmd->last_xfer_len += blen;
 642
 643                 thislen -= blen;
 644                 len -= blen;
 645
 646                 if (sense && write == 0)
 647                         rq->sense_len += blen;
 648         }
 649
 650         /* pad, if necessary */
 651         if (len > 0) {
 652                 if (rq->cmd_type != REQ_TYPE_FS || write == 0)
 653                         ide_pad_transfer(drive, write, len);
 654                 else {
 655                         printk(KERN_ERR PFX "%s: confused, missing data\n",
 656                                 drive->name);
 657                         blk_dump_rq_flags(rq, "cdrom_newpc_intr");
 658                 }
 659         }
 660
 661         if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
 662                 timeout = rq->timeout;
 663         } else {
 664                 timeout = ATAPI_WAIT_PC;
 665                 if (rq->cmd_type != REQ_TYPE_FS)
 666                         expiry = ide_cd_expiry;
 667         }
 668
 669         hwif->expiry = expiry;
 670         ide_set_handler(drive, cdrom_newpc_intr, timeout);
 671         return ide_started;
 672
 673 out_end:
 674         if (rq->cmd_type == REQ_TYPE_BLOCK_PC && rc == 0) {
 675                 rq->resid_len = 0;
 676                 blk_end_request_all(rq, 0);
 677                 hwif->rq = NULL;
 678         } else {
 679                 if (sense && uptodate)
 680                         ide_cd_complete_failed_rq(drive, rq);
 681
 682                 if (rq->cmd_type == REQ_TYPE_FS) {
 683                         if (cmd->nleft == 0)
 684                                 uptodate = 1;
 685                 } else {
 686                         if (uptodate <= 0 && rq->errors == 0)
 687                                 rq->errors = -EIO;
 688                 }
 689
 690                 if (uptodate == 0 && rq->bio)
 691                         if (ide_cd_error_cmd(drive, cmd))
 692                                 return ide_stopped;
 693
 694                 /* make sure it's fully ended */
 695                 if (rq->cmd_type != REQ_TYPE_FS) {
 696                         rq->resid_len -= cmd->nbytes - cmd->nleft;
 697                         if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
 698                                 rq->resid_len += cmd->last_xfer_len;
 699                 }
 700
 701                 ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq));
 702
 703                 if (sense && rc == 2)
 704                         ide_error(drive, "request sense failure", stat);
 705         }
 706         return ide_stopped;
 707 }
 708
 709 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 710 {
 711         struct cdrom_info *cd = drive->driver_data;
 712         struct request_queue *q = drive->queue;
 713         int write = rq_data_dir(rq) == WRITE;
 714         unsigned short sectors_per_frame =
 715                 queue_logical_block_size(q) >> SECTOR_BITS;
 716
 717         ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
 718                                   "secs_per_frame: %u",
 719                                   rq->cmd[0], rq->cmd_flags, sectors_per_frame);
 720
 721         if (write) {
 722                 /* disk has become write protected */
 723                 if (get_disk_ro(cd->disk))
 724                         return ide_stopped;
 725         } else {
 726                 /*
 727                  * We may be retrying this request after an error.  Fix up any
 728                  * weirdness which might be present in the request packet.
 729                  */
 730                 q->prep_rq_fn(q, rq);
 731         }
 732
 733         /* fs requests *must* be hardware frame aligned */
 734         if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
 735             (blk_rq_pos(rq) & (sectors_per_frame - 1)))
 736                 return ide_stopped;
 737
 738         /* use DMA, if possible */
 739         drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 740
 741         if (write)
 742                 cd->devinfo.media_written = 1;
 743
 744         rq->timeout = ATAPI_WAIT_PC;
 745
 746         return ide_started;
 747 }
 748
 749 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
 750 {
 751
 752         ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
 753                                   rq->cmd[0], rq->cmd_type);
 754
 755         if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
 756                 rq->cmd_flags |= REQ_QUIET;
 757         else
 758                 rq->cmd_flags &= ~REQ_FAILED;
 759
 760         drive->dma = 0;
 761
 762         /* sg request */
 763         if (rq->bio) {
 764                 struct request_queue *q = drive->queue;
 765                 char *buf = bio_data(rq->bio);
 766                 unsigned int alignment;
 767
 768                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 769
 770                 /*
 771                  * check if dma is safe
 772                  *
 773                  * NOTE! The "len" and "addr" checks should possibly have
 774                  * separate masks.
 775                  */
 776                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
 777                 if ((unsigned long)buf & alignment
 778                     || blk_rq_bytes(rq) & q->dma_pad_mask
 779                     || object_is_on_stack(buf))
 780                         drive->dma = 0;
 781         }
 782 }
 783
 784 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
 785                                         sector_t block)
 786 {
 787         struct ide_cmd cmd;
 788         int uptodate = 0, nsectors;
 789
 790         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
 791                                   rq->cmd[0], (unsigned long long)block);
 792
 793         if (drive->debug_mask & IDE_DBG_RQ)
 794                 blk_dump_rq_flags(rq, "ide_cd_do_request");
 795
 796         switch (rq->cmd_type) {
 797         case REQ_TYPE_FS:
 798                 if (cdrom_start_rw(drive, rq) == ide_stopped)
 799                         goto out_end;
 800                 break;
 801         case REQ_TYPE_SENSE:
 802         case REQ_TYPE_BLOCK_PC:
 803         case REQ_TYPE_ATA_PC:
 804                 if (!rq->timeout)
 805                         rq->timeout = ATAPI_WAIT_PC;
 806
 807                 cdrom_do_block_pc(drive, rq);
 808                 break;
 809         case REQ_TYPE_SPECIAL:
 810                 /* right now this can only be a reset... */
 811                 uptodate = 1;
 812                 goto out_end;
 813         default:
 814                 BUG();
 815         }
 816
 817         /* prepare sense request for this command */
 818         ide_prep_sense(drive, rq);
 819
 820         memset(&cmd, 0, sizeof(cmd));
 821
 822         if (rq_data_dir(rq))
 823                 cmd.tf_flags |= IDE_TFLAG_WRITE;
 824
 825         cmd.rq = rq;
 826
 827         if (rq->cmd_type == REQ_TYPE_FS || blk_rq_bytes(rq)) {
 828                 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
 829                 ide_map_sg(drive, &cmd);
 830         }
 831
 832         return ide_issue_pc(drive, &cmd);
 833 out_end:
 834         nsectors = blk_rq_sectors(rq);
 835
 836         if (nsectors == 0)
 837                 nsectors = 1;
 838
 839         ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
 840
 841         return ide_stopped;
 842 }
 843
 844 /*
 845  * Ioctl handling.
 846  *
 847  * Routines which queue packet commands take as a final argument a pointer to a
 848  * request_sense struct. If execution of the command results in an error with a
 849  * CHECK CONDITION status, this structure will be filled with the results of the
 850  * subsequent request sense command. The pointer can also be NULL, in which case
 851  * no sense information is returned.
 852  */
 853 static void msf_from_bcd(struct atapi_msf *msf)
 854 {
 855         msf->minute = bcd2bin(msf->minute);
 856         msf->second = bcd2bin(msf->second);
 857         msf->frame  = bcd2bin(msf->frame);
 858 }
 859
 860 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
 861 {
 862         struct cdrom_info *info = drive->driver_data;
 863         struct cdrom_device_info *cdi = &info->devinfo;
 864         unsigned char cmd[BLK_MAX_CDB];
 865
 866         ide_debug_log(IDE_DBG_FUNC, "enter");
 867
 868         memset(cmd, 0, BLK_MAX_CDB);
 869         cmd[0] = GPCMD_TEST_UNIT_READY;
 870
 871         /*
 872          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
 873          * instead of supporting the LOAD_UNLOAD opcode.
 874          */
 875         cmd[7] = cdi->sanyo_slot % 3;
 876
 877         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
 878 }
 879
 880 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
 881                                unsigned long *sectors_per_frame,
 882                                struct request_sense *sense)
 883 {
 884         struct {
 885                 __be32 lba;
 886                 __be32 blocklen;
 887         } capbuf;
 888
 889         int stat;
 890         unsigned char cmd[BLK_MAX_CDB];
 891         unsigned len = sizeof(capbuf);
 892         u32 blocklen;
 893
 894         ide_debug_log(IDE_DBG_FUNC, "enter");
 895
 896         memset(cmd, 0, BLK_MAX_CDB);
 897         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
 898
 899         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
 900                                REQ_QUIET);
 901         if (stat)
 902                 return stat;
 903
 904         /*
 905          * Sanity check the given block size, in so far as making
 906          * sure the sectors_per_frame we give to the caller won't
 907          * end up being bogus.
 908          */
 909         blocklen = be32_to_cpu(capbuf.blocklen);
 910         blocklen = (blocklen >> SECTOR_BITS) << SECTOR_BITS;
 911         switch (blocklen) {
 912         case 512:
 913         case 1024:
 914         case 2048:
 915         case 4096:
 916                 break;
 917         default:
 918                 printk_once(KERN_ERR PFX "%s: weird block size %u; "
 919                                 "setting default block size to 2048\n",
 920                                 drive->name, blocklen);
 921                 blocklen = 2048;
 922                 break;
 923         }
 924
 925         *capacity = 1 + be32_to_cpu(capbuf.lba);
 926         *sectors_per_frame = blocklen >> SECTOR_BITS;
 927
 928         ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
 929                                      *capacity, *sectors_per_frame);
 930
 931         return 0;
 932 }
 933
 934 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
 935                                 int format, char *buf, int buflen,
 936                                 struct request_sense *sense)
 937 {
 938         unsigned char cmd[BLK_MAX_CDB];
 939
 940         ide_debug_log(IDE_DBG_FUNC, "enter");
 941
 942         memset(cmd, 0, BLK_MAX_CDB);
 943
 944         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
 945         cmd[6] = trackno;
 946         cmd[7] = (buflen >> 8);
 947         cmd[8] = (buflen & 0xff);
 948         cmd[9] = (format << 6);
 949
 950         if (msf_flag)
 951                 cmd[1] = 2;
 952
 953         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
 954 }
 955
 956 /* Try to read the entire TOC for the disk into our internal buffer. */
 957 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
 958 {
 959         int stat, ntracks, i;
 960         struct cdrom_info *info = drive->driver_data;
 961         struct cdrom_device_info *cdi = &info->devinfo;
 962         struct atapi_toc *toc = info->toc;
 963         struct {
 964                 struct atapi_toc_header hdr;
 965                 struct atapi_toc_entry  ent;
 966         } ms_tmp;
 967         long last_written;
 968         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
 969
 970         ide_debug_log(IDE_DBG_FUNC, "enter");
 971
 972         if (toc == NULL) {
 973                 /* try to allocate space */
 974                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
 975                 if (toc == NULL) {
 976                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
 977                                         drive->name);
 978                         return -ENOMEM;
 979                 }
 980                 info->toc = toc;
 981         }
 982
 983         /*
 984          * Check to see if the existing data is still valid. If it is,
 985          * just return.
 986          */
 987         (void) cdrom_check_status(drive, sense);
 988
 989         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
 990                 return 0;
 991
 992         /* try to get the total cdrom capacity and sector size */
 993         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
 994                                    sense);
 995         if (stat)
 996                 toc->capacity = 0x1fffff;
 997
 998         set_capacity(info->disk, toc->capacity * sectors_per_frame);
 999         /* save a private copy of the TOC capacity for error handling */
1000         drive->probed_capacity = toc->capacity * sectors_per_frame;
1001
1002         blk_queue_logical_block_size(drive->queue,
1003                                      sectors_per_frame << SECTOR_BITS);
1004
1005         /* first read just the header, so we know how long the TOC is */
1006         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1007                                     sizeof(struct atapi_toc_header), sense);
1008         if (stat)
1009                 return stat;
1010
1011         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1012                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1013                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1014         }
1015
1016         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1017         if (ntracks <= 0)
1018                 return -EIO;
1019         if (ntracks > MAX_TRACKS)
1020                 ntracks = MAX_TRACKS;
1021
1022         /* now read the whole schmeer */
1023         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1024                                   (char *)&toc->hdr,
1025                                    sizeof(struct atapi_toc_header) +
1026                                    (ntracks + 1) *
1027                                    sizeof(struct atapi_toc_entry), sense);
1028
1029         if (stat && toc->hdr.first_track > 1) {
1030                 /*
1031                  * Cds with CDI tracks only don't have any TOC entries, despite
1032                  * of this the returned values are
1033                  * first_track == last_track = number of CDI tracks + 1,
1034                  * so that this case is indistinguishable from the same layout
1035                  * plus an additional audio track. If we get an error for the
1036                  * regular case, we assume a CDI without additional audio
1037                  * tracks. In this case the readable TOC is empty (CDI tracks
1038                  * are not included) and only holds the Leadout entry.
1039                  *
1040                  * Heiko Eißfeldt.
1041                  */
1042                 ntracks = 0;
1043                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1044                                            (char *)&toc->hdr,
1045                                            sizeof(struct atapi_toc_header) +
1046                                            (ntracks + 1) *
1047                                            sizeof(struct atapi_toc_entry),
1048                                            sense);
1049                 if (stat)
1050                         return stat;
1051
1052                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1053                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1054                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1055                 } else {
1056                         toc->hdr.first_track = CDROM_LEADOUT;
1057                         toc->hdr.last_track = CDROM_LEADOUT;
1058                 }
1059         }
1060
1061         if (stat)
1062                 return stat;
1063
1064         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1065
1066         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1067                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1068                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1069         }
1070
1071         for (i = 0; i <= ntracks; i++) {
1072                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1073                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1074                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1075                         msf_from_bcd(&toc->ent[i].addr.msf);
1076                 }
1077                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1078                                                   toc->ent[i].addr.msf.second,
1079                                                   toc->ent[i].addr.msf.frame);
1080         }
1081
1082         if (toc->hdr.first_track != CDROM_LEADOUT) {
1083                 /* read the multisession information */
1084                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1085                                            sizeof(ms_tmp), sense);
1086                 if (stat)
1087                         return stat;
1088
1089                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1090         } else {
1091                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1092                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1093                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1094         }
1095
1096         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1097                 /* re-read multisession information using MSF format */
1098                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1099                                            sizeof(ms_tmp), sense);
1100                 if (stat)
1101                         return stat;
1102
1103                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1104                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1105                                                    ms_tmp.ent.addr.msf.second,
1106                                                    ms_tmp.ent.addr.msf.frame);
1107         }
1108
1109         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1110
1111         /* now try to get the total cdrom capacity */
1112         stat = cdrom_get_last_written(cdi, &last_written);
1113         if (!stat && (last_written > toc->capacity)) {
1114                 toc->capacity = last_written;
1115                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1116                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1117         }
1118
1119         /* Remember that we've read this stuff. */
1120         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1121
1122         return 0;
1123 }
1124
1125 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1126 {
1127         struct cdrom_info *info = drive->driver_data;
1128         struct cdrom_device_info *cdi = &info->devinfo;
1129         struct packet_command cgc;
1130         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1131
1132         ide_debug_log(IDE_DBG_FUNC, "enter");
1133
1134         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1135                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1136
1137         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1138         do {
1139                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1140                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1141                 if (!stat)
1142                         break;
1143         } while (--attempts);
1144         return stat;
1145 }
1146
1147 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1148 {
1149         struct cdrom_info *cd = drive->driver_data;
1150         u16 curspeed, maxspeed;
1151
1152         ide_debug_log(IDE_DBG_FUNC, "enter");
1153
1154         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1155                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1156                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1157         } else {
1158                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1159                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1160         }
1161
1162         ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1163                                      curspeed, maxspeed);
1164
1165         cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176);
1166         cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176);
1167 }
1168
1169 #define IDE_CD_CAPABILITIES \
1170         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1171          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1172          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1173          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1174          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1175
1176 static struct cdrom_device_ops ide_cdrom_dops = {
1177         .open                   = ide_cdrom_open_real,
1178         .release                = ide_cdrom_release_real,
1179         .drive_status           = ide_cdrom_drive_status,
1180         .media_changed          = ide_cdrom_check_media_change_real,
1181         .tray_move              = ide_cdrom_tray_move,
1182         .lock_door              = ide_cdrom_lock_door,
1183         .select_speed           = ide_cdrom_select_speed,
1184         .get_last_session       = ide_cdrom_get_last_session,
1185         .get_mcn                = ide_cdrom_get_mcn,
1186         .reset                  = ide_cdrom_reset,
1187         .audio_ioctl            = ide_cdrom_audio_ioctl,
1188         .capability             = IDE_CD_CAPABILITIES,
1189         .generic_packet         = ide_cdrom_packet,
1190 };
1191
1192 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1193 {
1194         struct cdrom_info *info = drive->driver_data;
1195         struct cdrom_device_info *devinfo = &info->devinfo;
1196
1197         ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1198
1199         devinfo->ops = &ide_cdrom_dops;
1200         devinfo->speed = info->current_speed;
1201         devinfo->capacity = nslots;
1202         devinfo->handle = drive;
1203         strcpy(devinfo->name, drive->name);
1204
1205         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1206                 devinfo->mask |= CDC_SELECT_SPEED;
1207
1208         devinfo->disk = info->disk;
1209         return register_cdrom(devinfo);
1210 }
1211
1212 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1213 {
1214         struct cdrom_info *cd = drive->driver_data;
1215         struct cdrom_device_info *cdi = &cd->devinfo;
1216         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1217         mechtype_t mechtype;
1218         int nslots = 1;
1219
1220         ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1221                                      drive->media, drive->atapi_flags);
1222
1223         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1224                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1225                      CDC_MO_DRIVE | CDC_RAM);
1226
1227         if (drive->media == ide_optical) {
1228                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1229                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1230                                 drive->name);
1231                 return nslots;
1232         }
1233
1234         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1235                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1236                 cdi->mask &= ~CDC_PLAY_AUDIO;
1237                 return nslots;
1238         }
1239
1240         /*
1241          * We have to cheat a little here. the packet will eventually be queued
1242          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1243          * Since this device hasn't been registered with the Uniform layer yet,
1244          * it can't do this. Same goes for cdi->ops.
1245          */
1246         cdi->handle = drive;
1247         cdi->ops = &ide_cdrom_dops;
1248
1249         if (ide_cdrom_get_capabilities(drive, buf))
1250                 return 0;
1251
1252         if ((buf[8 + 6] & 0x01) == 0)
1253                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1254         if (buf[8 + 6] & 0x08)
1255                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1256         if (buf[8 + 3] & 0x01)
1257                 cdi->mask &= ~CDC_CD_R;
1258         if (buf[8 + 3] & 0x02)
1259                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1260         if (buf[8 + 2] & 0x38)
1261                 cdi->mask &= ~CDC_DVD;
1262         if (buf[8 + 3] & 0x20)
1263                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1264         if (buf[8 + 3] & 0x10)
1265                 cdi->mask &= ~CDC_DVD_R;
1266         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1267                 cdi->mask &= ~CDC_PLAY_AUDIO;
1268
1269         mechtype = buf[8 + 6] >> 5;
1270         if (mechtype == mechtype_caddy ||
1271             mechtype == mechtype_popup ||
1272             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1273                 cdi->mask |= CDC_CLOSE_TRAY;
1274
1275         if (cdi->sanyo_slot > 0) {
1276                 cdi->mask &= ~CDC_SELECT_DISC;
1277                 nslots = 3;
1278         } else if (mechtype == mechtype_individual_changer ||
1279                    mechtype == mechtype_cartridge_changer) {
1280                 nslots = cdrom_number_of_slots(cdi);
1281                 if (nslots > 1)
1282                         cdi->mask &= ~CDC_SELECT_DISC;
1283         }
1284
1285         ide_cdrom_update_speed(drive, buf);
1286
1287         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1288
1289         /* don't print speed if the drive reported 0 */
1290         if (cd->max_speed)
1291                 printk(KERN_CONT " %dX", cd->max_speed);
1292
1293         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1294
1295         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1296                 printk(KERN_CONT " DVD%s%s",
1297                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1298                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1299
1300         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1301                 printk(KERN_CONT " CD%s%s",
1302                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1303                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1304
1305         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1306                 printk(KERN_CONT " changer w/%d slots", nslots);
1307         else
1308                 printk(KERN_CONT " drive");
1309
1310         printk(KERN_CONT ", %dkB Cache\n",
1311                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1312
1313         return nslots;
1314 }
1315
1316 /* standard prep_rq_fn that builds 10 byte cmds */
1317 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1318 {
1319         int hard_sect = queue_logical_block_size(q);
1320         long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
1321         unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
1322
1323         memset(rq->cmd, 0, BLK_MAX_CDB);
1324
1325         if (rq_data_dir(rq) == READ)
1326                 rq->cmd[0] = GPCMD_READ_10;
1327         else
1328                 rq->cmd[0] = GPCMD_WRITE_10;
1329
1330         /*
1331          * fill in lba
1332          */
1333         rq->cmd[2] = (block >> 24) & 0xff;
1334         rq->cmd[3] = (block >> 16) & 0xff;
1335         rq->cmd[4] = (block >>  8) & 0xff;
1336         rq->cmd[5] = block & 0xff;
1337
1338         /*
1339          * and transfer length
1340          */
1341         rq->cmd[7] = (blocks >> 8) & 0xff;
1342         rq->cmd[8] = blocks & 0xff;
1343         rq->cmd_len = 10;
1344         return BLKPREP_OK;
1345 }
1346
1347 /*
1348  * Most of the SCSI commands are supported directly by ATAPI devices.
1349  * This transform handles the few exceptions.
1350  */
1351 static int ide_cdrom_prep_pc(struct request *rq)
1352 {
1353         u8 *c = rq->cmd;
1354
1355         /* transform 6-byte read/write commands to the 10-byte version */
1356         if (c[0] == READ_6 || c[0] == WRITE_6) {
1357                 c[8] = c[4];
1358                 c[5] = c[3];
1359                 c[4] = c[2];
1360                 c[3] = c[1] & 0x1f;
1361                 c[2] = 0;
1362                 c[1] &= 0xe0;
1363                 c[0] += (READ_10 - READ_6);
1364                 rq->cmd_len = 10;
1365                 return BLKPREP_OK;
1366         }
1367
1368         /*
1369          * it's silly to pretend we understand 6-byte sense commands, just
1370          * reject with ILLEGAL_REQUEST and the caller should take the
1371          * appropriate action
1372          */
1373         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1374                 rq->errors = ILLEGAL_REQUEST;
1375                 return BLKPREP_KILL;
1376         }
1377
1378         return BLKPREP_OK;
1379 }
1380
1381 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1382 {
1383         if (rq->cmd_type == REQ_TYPE_FS)
1384                 return ide_cdrom_prep_fs(q, rq);
1385         else if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
1386                 return ide_cdrom_prep_pc(rq);
1387
1388         return 0;
1389 }
1390
1391 struct cd_list_entry {
1392         const char      *id_model;
1393         const char      *id_firmware;
1394         unsigned int    cd_flags;
1395 };
1396
1397 #ifdef CONFIG_IDE_PROC_FS
1398 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1399 {
1400         unsigned long capacity, sectors_per_frame;
1401
1402         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1403                 return 0;
1404
1405         return capacity * sectors_per_frame;
1406 }
1407
1408 static int idecd_capacity_proc_show(struct seq_file *m, void *v)
1409 {
1410         ide_drive_t *drive = m->private;
1411
1412         seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive));
1413         return 0;
1414 }
1415
1416 static int idecd_capacity_proc_open(struct inode *inode, struct file *file)
1417 {
1418         return single_open(file, idecd_capacity_proc_show, PDE(inode)->data);
1419 }
1420
1421 static const struct file_operations idecd_capacity_proc_fops = {
1422         .owner          = THIS_MODULE,
1423         .open           = idecd_capacity_proc_open,
1424         .read           = seq_read,
1425         .llseek         = seq_lseek,
1426         .release        = single_release,
1427 };
1428
1429 static ide_proc_entry_t idecd_proc[] = {
1430         { "capacity", S_IFREG|S_IRUGO, &idecd_capacity_proc_fops },
1431         {}
1432 };
1433
1434 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1435 {
1436         return idecd_proc;
1437 }
1438
1439 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1440 {
1441         return NULL;
1442 }
1443 #endif
1444
1445 static const struct cd_list_entry ide_cd_quirks_list[] = {
1446         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1447         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1448         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1449         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1450                                              IDE_AFLAG_PRE_ATAPI12,          },
1451         /* Vertos 300, some versions of this drive like to talk BCD. */
1452         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1453         /* Vertos 600 ESD. */
1454         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1455         /*
1456          * Sanyo 3 CD changer uses a non-standard command for CD changing
1457          * (by default standard ATAPI support for CD changers is used).
1458          */
1459         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1460         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1461         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1462         /* Stingray 8X CD-ROM. */
1463         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1464         /*
1465          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1466          * mode sense page capabilities size, but older drives break.
1467          */
1468         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1469         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1470         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1471         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1472         /*
1473          * Some drives used by Apple don't advertise audio play
1474          * but they do support reading TOC & audio datas.
1475          */
1476         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1477         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1478         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1479         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1480         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1481         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1482         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1483         { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1484         { NULL, NULL, 0 }
1485 };
1486
1487 static unsigned int ide_cd_flags(u16 *id)
1488 {
1489         const struct cd_list_entry *cle = ide_cd_quirks_list;
1490
1491         while (cle->id_model) {
1492                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1493                     (cle->id_firmware == NULL ||
1494                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1495                         return cle->cd_flags;
1496                 cle++;
1497         }
1498
1499         return 0;
1500 }
1501
1502 static int ide_cdrom_setup(ide_drive_t *drive)
1503 {
1504         struct cdrom_info *cd = drive->driver_data;
1505         struct cdrom_device_info *cdi = &cd->devinfo;
1506         struct request_queue *q = drive->queue;
1507         u16 *id = drive->id;
1508         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1509         int nslots;
1510
1511         ide_debug_log(IDE_DBG_PROBE, "enter");
1512
1513         blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1514         blk_queue_dma_alignment(q, 31);
1515         blk_queue_update_dma_pad(q, 15);
1516
1517         q->unplug_delay = max((1 * HZ) / 1000, 1);
1518
1519         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1520         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1521
1522         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1523             fw_rev[4] == '1' && fw_rev[6] <= '2')
1524                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1525                                      IDE_AFLAG_TOCADDR_AS_BCD);
1526         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1527                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1528                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1529         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1530                 /* 3 => use CD in slot 0 */
1531                 cdi->sanyo_slot = 3;
1532
1533         nslots = ide_cdrom_probe_capabilities(drive);
1534
1535         blk_queue_logical_block_size(q, CD_FRAMESIZE);
1536
1537         if (ide_cdrom_register(drive, nslots)) {
1538                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1539                                 " cdrom driver.\n", drive->name, __func__);
1540                 cd->devinfo.handle = NULL;
1541                 return 1;
1542         }
1543
1544         ide_proc_register_driver(drive, cd->driver);
1545         return 0;
1546 }
1547
1548 static void ide_cd_remove(ide_drive_t *drive)
1549 {
1550         struct cdrom_info *info = drive->driver_data;
1551
1552         ide_debug_log(IDE_DBG_FUNC, "enter");
1553
1554         ide_proc_unregister_driver(drive, info->driver);
1555         device_del(&info->dev);
1556         del_gendisk(info->disk);
1557
1558         mutex_lock(&idecd_ref_mutex);
1559         put_device(&info->dev);
1560         mutex_unlock(&idecd_ref_mutex);
1561 }
1562
1563 static void ide_cd_release(struct device *dev)
1564 {
1565         struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1566         struct cdrom_device_info *devinfo = &info->devinfo;
1567         ide_drive_t *drive = info->drive;
1568         struct gendisk *g = info->disk;
1569
1570         ide_debug_log(IDE_DBG_FUNC, "enter");
1571
1572         kfree(info->toc);
1573         if (devinfo->handle == drive)
1574                 unregister_cdrom(devinfo);
1575         drive->driver_data = NULL;
1576         blk_queue_prep_rq(drive->queue, NULL);
1577         g->private_data = NULL;
1578         put_disk(g);
1579         kfree(info);
1580 }
1581
1582 static int ide_cd_probe(ide_drive_t *);
1583
1584 static struct ide_driver ide_cdrom_driver = {
1585         .gen_driver = {
1586                 .owner          = THIS_MODULE,
1587                 .name           = "ide-cdrom",
1588                 .bus            = &ide_bus_type,
1589         },
1590         .probe                  = ide_cd_probe,
1591         .remove                 = ide_cd_remove,
1592         .version                = IDECD_VERSION,
1593         .do_request             = ide_cd_do_request,
1594 #ifdef CONFIG_IDE_PROC_FS
1595         .proc_entries           = ide_cd_proc_entries,
1596         .proc_devsets           = ide_cd_proc_devsets,
1597 #endif
1598 };
1599
1600 static int idecd_open(struct block_device *bdev, fmode_t mode)
1601 {
1602         struct cdrom_info *info;
1603         int rc = -ENXIO;
1604
1605         lock_kernel();
1606         info = ide_cd_get(bdev->bd_disk);
1607         if (!info)
1608                 goto out;
1609
1610         rc = cdrom_open(&info->devinfo, bdev, mode);
1611         if (rc < 0)
1612                 ide_cd_put(info);
1613 out:
1614         unlock_kernel();
1615         return rc;
1616 }
1617
1618 static int idecd_release(struct gendisk *disk, fmode_t mode)
1619 {
1620         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1621
1622         lock_kernel();
1623         cdrom_release(&info->devinfo, mode);
1624
1625         ide_cd_put(info);
1626         unlock_kernel();
1627
1628         return 0;
1629 }
1630
1631 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1632 {
1633         struct packet_command cgc;
1634         char buffer[16];
1635         int stat;
1636         char spindown;
1637
1638         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1639                 return -EFAULT;
1640
1641         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1642
1643         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1644         if (stat)
1645                 return stat;
1646
1647         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1648         return cdrom_mode_select(cdi, &cgc);
1649 }
1650
1651 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1652 {
1653         struct packet_command cgc;
1654         char buffer[16];
1655         int stat;
1656         char spindown;
1657
1658         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1659
1660         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1661         if (stat)
1662                 return stat;
1663
1664         spindown = buffer[11] & 0x0f;
1665         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1666                 return -EFAULT;
1667         return 0;
1668 }
1669
1670 static int idecd_locked_ioctl(struct block_device *bdev, fmode_t mode,
1671                         unsigned int cmd, unsigned long arg)
1672 {
1673         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1674         int err;
1675
1676         switch (cmd) {
1677         case CDROMSETSPINDOWN:
1678                 return idecd_set_spindown(&info->devinfo, arg);
1679         case CDROMGETSPINDOWN:
1680                 return idecd_get_spindown(&info->devinfo, arg);
1681         default:
1682                 break;
1683         }
1684
1685         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1686         if (err == -EINVAL)
1687                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1688
1689         return err;
1690 }
1691
1692 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1693                              unsigned int cmd, unsigned long arg)
1694 {
1695         int ret;
1696
1697         lock_kernel();
1698         ret = idecd_locked_ioctl(bdev, mode, cmd, arg);
1699         unlock_kernel();
1700
1701         return ret;
1702 }
1703
1704
1705 static int idecd_media_changed(struct gendisk *disk)
1706 {
1707         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1708         return cdrom_media_changed(&info->devinfo);
1709 }
1710
1711 static int idecd_revalidate_disk(struct gendisk *disk)
1712 {
1713         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1714         struct request_sense sense;
1715
1716         ide_cd_read_toc(info->drive, &sense);
1717
1718         return  0;
1719 }
1720
1721 static const struct block_device_operations idecd_ops = {
1722         .owner                  = THIS_MODULE,
1723         .open                   = idecd_open,
1724         .release                = idecd_release,
1725         .ioctl                  = idecd_ioctl,
1726         .media_changed          = idecd_media_changed,
1727         .revalidate_disk        = idecd_revalidate_disk
1728 };
1729
1730 /* module options */
1731 static unsigned long debug_mask;
1732 module_param(debug_mask, ulong, 0644);
1733
1734 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1735
1736 static int ide_cd_probe(ide_drive_t *drive)
1737 {
1738         struct cdrom_info *info;
1739         struct gendisk *g;
1740         struct request_sense sense;
1741
1742         ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1743                                      drive->driver_req, drive->media);
1744
1745         if (!strstr("ide-cdrom", drive->driver_req))
1746                 goto failed;
1747
1748         if (drive->media != ide_cdrom && drive->media != ide_optical)
1749                 goto failed;
1750
1751         drive->debug_mask = debug_mask;
1752         drive->irq_handler = cdrom_newpc_intr;
1753
1754         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1755         if (info == NULL) {
1756                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1757                                 drive->name);
1758                 goto failed;
1759         }
1760
1761         g = alloc_disk(1 << PARTN_BITS);
1762         if (!g)
1763                 goto out_free_cd;
1764
1765         ide_init_disk(g, drive);
1766
1767         info->dev.parent = &drive->gendev;
1768         info->dev.release = ide_cd_release;
1769         dev_set_name(&info->dev, dev_name(&drive->gendev));
1770
1771         if (device_register(&info->dev))
1772                 goto out_free_disk;
1773
1774         info->drive = drive;
1775         info->driver = &ide_cdrom_driver;
1776         info->disk = g;
1777
1778         g->private_data = &info->driver;
1779
1780         drive->driver_data = info;
1781
1782         g->minors = 1;
1783         g->driverfs_dev = &drive->gendev;
1784         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1785         if (ide_cdrom_setup(drive)) {
1786                 put_device(&info->dev);
1787                 goto failed;
1788         }
1789
1790         ide_cd_read_toc(drive, &sense);
1791         g->fops = &idecd_ops;
1792         g->flags |= GENHD_FL_REMOVABLE;
1793         add_disk(g);
1794         return 0;
1795
1796 out_free_disk:
1797         put_disk(g);
1798 out_free_cd:
1799         kfree(info);
1800 failed:
1801         return -ENODEV;
1802 }
1803
1804 static void __exit ide_cdrom_exit(void)
1805 {
1806         driver_unregister(&ide_cdrom_driver.gen_driver);
1807 }
1808
1809 static int __init ide_cdrom_init(void)
1810 {
1811         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1812         return driver_register(&ide_cdrom_driver.gen_driver);
1813 }
1814
1815 MODULE_ALIAS("ide:*m-cdrom*");
1816 MODULE_ALIAS("ide-cd");
1817 module_init(ide_cdrom_init);
1818 module_exit(ide_cdrom_exit);
1819 MODULE_LICENSE("GPL");