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 static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 512 {
 513         unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
 514
 515         if (cmd->tf_flags & IDE_TFLAG_WRITE)
 516                 nr_bytes -= cmd->last_xfer_len;
 517
 518         if (nr_bytes > 0)
 519                 ide_complete_rq(drive, 0, nr_bytes);
 520 }
 521
 522 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 523 {
 524         ide_hwif_t *hwif = drive->hwif;
 525         struct ide_cmd *cmd = &hwif->cmd;
 526         struct request *rq = hwif->rq;
 527         ide_expiry_t *expiry = NULL;
 528         int dma_error = 0, dma, thislen, uptodate = 0;
 529         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
 530         int sense = (rq->cmd_type == REQ_TYPE_SENSE);
 531         unsigned int timeout;
 532         u16 len;
 533         u8 ireason, stat;
 534
 535         ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
 536
 537         /* check for errors */
 538         dma = drive->dma;
 539         if (dma) {
 540                 drive->dma = 0;
 541                 drive->waiting_for_dma = 0;
 542                 dma_error = hwif->dma_ops->dma_end(drive);
 543                 ide_dma_unmap_sg(drive, cmd);
 544                 if (dma_error) {
 545                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 546                                         write ? "write" : "read");
 547                         ide_dma_off(drive);
 548                 }
 549         }
 550
 551         /* check status */
 552         stat = hwif->tp_ops->read_status(hwif);
 553
 554         if (!OK_STAT(stat, 0, BAD_R_STAT)) {
 555                 rc = cdrom_decode_status(drive, stat);
 556                 if (rc) {
 557                         if (rc == 2)
 558                                 goto out_end;
 559                         return ide_stopped;
 560                 }
 561         }
 562
 563         /* using dma, transfer is complete now */
 564         if (dma) {
 565                 if (dma_error)
 566                         return ide_error(drive, "dma error", stat);
 567                 uptodate = 1;
 568                 goto out_end;
 569         }
 570
 571         ide_read_bcount_and_ireason(drive, &len, &ireason);
 572
 573         thislen = (rq->cmd_type == REQ_TYPE_FS) ? len : cmd->nleft;
 574         if (thislen > len)
 575                 thislen = len;
 576
 577         ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
 578                                   stat, thislen);
 579
 580         /* If DRQ is clear, the command has completed. */
 581         if ((stat & ATA_DRQ) == 0) {
 582                 if (rq->cmd_type == REQ_TYPE_FS) {
 583                         /*
 584                          * If we're not done reading/writing, complain.
 585                          * Otherwise, complete the command normally.
 586                          */
 587                         uptodate = 1;
 588                         if (cmd->nleft > 0) {
 589                                 printk(KERN_ERR PFX "%s: %s: data underrun "
 590                                         "(%u bytes)\n", drive->name, __func__,
 591                                         cmd->nleft);
 592                                 if (!write)
 593                                         rq->cmd_flags |= REQ_FAILED;
 594                                 uptodate = 0;
 595                         }
 596                 } else if (rq->cmd_type != REQ_TYPE_BLOCK_PC) {
 597                         ide_cd_request_sense_fixup(drive, cmd);
 598
 599                         uptodate = cmd->nleft ? 0 : 1;
 600
 601                         /*
 602                          * suck out the remaining bytes from the drive in an
 603                          * attempt to complete the data xfer. (see BZ#13399)
 604                          */
 605                         if (!(stat & ATA_ERR) && !uptodate && thislen) {
 606                                 ide_pio_bytes(drive, cmd, write, thislen);
 607                                 uptodate = cmd->nleft ? 0 : 1;
 608                         }
 609
 610                         if (!uptodate)
 611                                 rq->cmd_flags |= REQ_FAILED;
 612                 }
 613                 goto out_end;
 614         }
 615
 616         rc = ide_check_ireason(drive, rq, len, ireason, write);
 617         if (rc)
 618                 goto out_end;
 619
 620         cmd->last_xfer_len = 0;
 621
 622         ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
 623                                   "ireason: 0x%x",
 624                                   rq->cmd_type, ireason);
 625
 626         /* transfer data */
 627         while (thislen > 0) {
 628                 int blen = min_t(int, thislen, cmd->nleft);
 629
 630                 if (cmd->nleft == 0)
 631                         break;
 632
 633                 ide_pio_bytes(drive, cmd, write, blen);
 634                 cmd->last_xfer_len += blen;
 635
 636                 thislen -= blen;
 637                 len -= blen;
 638
 639                 if (sense && write == 0)
 640                         rq->sense_len += blen;
 641         }
 642
 643         /* pad, if necessary */
 644         if (len > 0) {
 645                 if (rq->cmd_type != REQ_TYPE_FS || write == 0)
 646                         ide_pad_transfer(drive, write, len);
 647                 else {
 648                         printk(KERN_ERR PFX "%s: confused, missing data\n",
 649                                 drive->name);
 650                         blk_dump_rq_flags(rq, "cdrom_newpc_intr");
 651                 }
 652         }
 653
 654         if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
 655                 timeout = rq->timeout;
 656         } else {
 657                 timeout = ATAPI_WAIT_PC;
 658                 if (rq->cmd_type != REQ_TYPE_FS)
 659                         expiry = ide_cd_expiry;
 660         }
 661
 662         hwif->expiry = expiry;
 663         ide_set_handler(drive, cdrom_newpc_intr, timeout);
 664         return ide_started;
 665
 666 out_end:
 667         if (rq->cmd_type == REQ_TYPE_BLOCK_PC && rc == 0) {
 668                 rq->resid_len = 0;
 669                 blk_end_request_all(rq, 0);
 670                 hwif->rq = NULL;
 671         } else {
 672                 if (sense && uptodate)
 673                         ide_cd_complete_failed_rq(drive, rq);
 674
 675                 if (rq->cmd_type == REQ_TYPE_FS) {
 676                         if (cmd->nleft == 0)
 677                                 uptodate = 1;
 678                 } else {
 679                         if (uptodate <= 0 && rq->errors == 0)
 680                                 rq->errors = -EIO;
 681                 }
 682
 683                 if (uptodate == 0 && rq->bio)
 684                         ide_cd_error_cmd(drive, cmd);
 685
 686                 /* make sure it's fully ended */
 687                 if (rq->cmd_type != REQ_TYPE_FS) {
 688                         rq->resid_len -= cmd->nbytes - cmd->nleft;
 689                         if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
 690                                 rq->resid_len += cmd->last_xfer_len;
 691                 }
 692
 693                 ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq));
 694
 695                 if (sense && rc == 2)
 696                         ide_error(drive, "request sense failure", stat);
 697         }
 698         return ide_stopped;
 699 }
 700
 701 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 702 {
 703         struct cdrom_info *cd = drive->driver_data;
 704         struct request_queue *q = drive->queue;
 705         int write = rq_data_dir(rq) == WRITE;
 706         unsigned short sectors_per_frame =
 707                 queue_logical_block_size(q) >> SECTOR_BITS;
 708
 709         ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
 710                                   "secs_per_frame: %u",
 711                                   rq->cmd[0], rq->cmd_flags, sectors_per_frame);
 712
 713         if (write) {
 714                 /* disk has become write protected */
 715                 if (get_disk_ro(cd->disk))
 716                         return ide_stopped;
 717         } else {
 718                 /*
 719                  * We may be retrying this request after an error.  Fix up any
 720                  * weirdness which might be present in the request packet.
 721                  */
 722                 q->prep_rq_fn(q, rq);
 723         }
 724
 725         /* fs requests *must* be hardware frame aligned */
 726         if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
 727             (blk_rq_pos(rq) & (sectors_per_frame - 1)))
 728                 return ide_stopped;
 729
 730         /* use DMA, if possible */
 731         drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 732
 733         if (write)
 734                 cd->devinfo.media_written = 1;
 735
 736         rq->timeout = ATAPI_WAIT_PC;
 737
 738         return ide_started;
 739 }
 740
 741 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
 742 {
 743
 744         ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
 745                                   rq->cmd[0], rq->cmd_type);
 746
 747         if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
 748                 rq->cmd_flags |= REQ_QUIET;
 749         else
 750                 rq->cmd_flags &= ~REQ_FAILED;
 751
 752         drive->dma = 0;
 753
 754         /* sg request */
 755         if (rq->bio) {
 756                 struct request_queue *q = drive->queue;
 757                 char *buf = bio_data(rq->bio);
 758                 unsigned int alignment;
 759
 760                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 761
 762                 /*
 763                  * check if dma is safe
 764                  *
 765                  * NOTE! The "len" and "addr" checks should possibly have
 766                  * separate masks.
 767                  */
 768                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
 769                 if ((unsigned long)buf & alignment
 770                     || blk_rq_bytes(rq) & q->dma_pad_mask
 771                     || object_is_on_stack(buf))
 772                         drive->dma = 0;
 773         }
 774 }
 775
 776 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
 777                                         sector_t block)
 778 {
 779         struct ide_cmd cmd;
 780         int uptodate = 0, nsectors;
 781
 782         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
 783                                   rq->cmd[0], (unsigned long long)block);
 784
 785         if (drive->debug_mask & IDE_DBG_RQ)
 786                 blk_dump_rq_flags(rq, "ide_cd_do_request");
 787
 788         switch (rq->cmd_type) {
 789         case REQ_TYPE_FS:
 790                 if (cdrom_start_rw(drive, rq) == ide_stopped)
 791                         goto out_end;
 792                 break;
 793         case REQ_TYPE_SENSE:
 794         case REQ_TYPE_BLOCK_PC:
 795         case REQ_TYPE_ATA_PC:
 796                 if (!rq->timeout)
 797                         rq->timeout = ATAPI_WAIT_PC;
 798
 799                 cdrom_do_block_pc(drive, rq);
 800                 break;
 801         case REQ_TYPE_SPECIAL:
 802                 /* right now this can only be a reset... */
 803                 uptodate = 1;
 804                 goto out_end;
 805         default:
 806                 BUG();
 807         }
 808
 809         /* prepare sense request for this command */
 810         ide_prep_sense(drive, rq);
 811
 812         memset(&cmd, 0, sizeof(cmd));
 813
 814         if (rq_data_dir(rq))
 815                 cmd.tf_flags |= IDE_TFLAG_WRITE;
 816
 817         cmd.rq = rq;
 818
 819         if (rq->cmd_type == REQ_TYPE_FS || blk_rq_bytes(rq)) {
 820                 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
 821                 ide_map_sg(drive, &cmd);
 822         }
 823
 824         return ide_issue_pc(drive, &cmd);
 825 out_end:
 826         nsectors = blk_rq_sectors(rq);
 827
 828         if (nsectors == 0)
 829                 nsectors = 1;
 830
 831         ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
 832
 833         return ide_stopped;
 834 }
 835
 836 /*
 837  * Ioctl handling.
 838  *
 839  * Routines which queue packet commands take as a final argument a pointer to a
 840  * request_sense struct. If execution of the command results in an error with a
 841  * CHECK CONDITION status, this structure will be filled with the results of the
 842  * subsequent request sense command. The pointer can also be NULL, in which case
 843  * no sense information is returned.
 844  */
 845 static void msf_from_bcd(struct atapi_msf *msf)
 846 {
 847         msf->minute = bcd2bin(msf->minute);
 848         msf->second = bcd2bin(msf->second);
 849         msf->frame  = bcd2bin(msf->frame);
 850 }
 851
 852 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
 853 {
 854         struct cdrom_info *info = drive->driver_data;
 855         struct cdrom_device_info *cdi = &info->devinfo;
 856         unsigned char cmd[BLK_MAX_CDB];
 857
 858         ide_debug_log(IDE_DBG_FUNC, "enter");
 859
 860         memset(cmd, 0, BLK_MAX_CDB);
 861         cmd[0] = GPCMD_TEST_UNIT_READY;
 862
 863         /*
 864          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
 865          * instead of supporting the LOAD_UNLOAD opcode.
 866          */
 867         cmd[7] = cdi->sanyo_slot % 3;
 868
 869         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
 870 }
 871
 872 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
 873                                unsigned long *sectors_per_frame,
 874                                struct request_sense *sense)
 875 {
 876         struct {
 877                 __be32 lba;
 878                 __be32 blocklen;
 879         } capbuf;
 880
 881         int stat;
 882         unsigned char cmd[BLK_MAX_CDB];
 883         unsigned len = sizeof(capbuf);
 884         u32 blocklen;
 885
 886         ide_debug_log(IDE_DBG_FUNC, "enter");
 887
 888         memset(cmd, 0, BLK_MAX_CDB);
 889         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
 890
 891         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
 892                                REQ_QUIET);
 893         if (stat)
 894                 return stat;
 895
 896         /*
 897          * Sanity check the given block size, in so far as making
 898          * sure the sectors_per_frame we give to the caller won't
 899          * end up being bogus.
 900          */
 901         blocklen = be32_to_cpu(capbuf.blocklen);
 902         blocklen = (blocklen >> SECTOR_BITS) << SECTOR_BITS;
 903         switch (blocklen) {
 904         case 512:
 905         case 1024:
 906         case 2048:
 907         case 4096:
 908                 break;
 909         default:
 910                 printk_once(KERN_ERR PFX "%s: weird block size %u; "
 911                                 "setting default block size to 2048\n",
 912                                 drive->name, blocklen);
 913                 blocklen = 2048;
 914                 break;
 915         }
 916
 917         *capacity = 1 + be32_to_cpu(capbuf.lba);
 918         *sectors_per_frame = blocklen >> SECTOR_BITS;
 919
 920         ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
 921                                      *capacity, *sectors_per_frame);
 922
 923         return 0;
 924 }
 925
 926 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
 927                                 int format, char *buf, int buflen,
 928                                 struct request_sense *sense)
 929 {
 930         unsigned char cmd[BLK_MAX_CDB];
 931
 932         ide_debug_log(IDE_DBG_FUNC, "enter");
 933
 934         memset(cmd, 0, BLK_MAX_CDB);
 935
 936         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
 937         cmd[6] = trackno;
 938         cmd[7] = (buflen >> 8);
 939         cmd[8] = (buflen & 0xff);
 940         cmd[9] = (format << 6);
 941
 942         if (msf_flag)
 943                 cmd[1] = 2;
 944
 945         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
 946 }
 947
 948 /* Try to read the entire TOC for the disk into our internal buffer. */
 949 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
 950 {
 951         int stat, ntracks, i;
 952         struct cdrom_info *info = drive->driver_data;
 953         struct cdrom_device_info *cdi = &info->devinfo;
 954         struct atapi_toc *toc = info->toc;
 955         struct {
 956                 struct atapi_toc_header hdr;
 957                 struct atapi_toc_entry  ent;
 958         } ms_tmp;
 959         long last_written;
 960         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
 961
 962         ide_debug_log(IDE_DBG_FUNC, "enter");
 963
 964         if (toc == NULL) {
 965                 /* try to allocate space */
 966                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
 967                 if (toc == NULL) {
 968                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
 969                                         drive->name);
 970                         return -ENOMEM;
 971                 }
 972                 info->toc = toc;
 973         }
 974
 975         /*
 976          * Check to see if the existing data is still valid. If it is,
 977          * just return.
 978          */
 979         (void) cdrom_check_status(drive, sense);
 980
 981         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
 982                 return 0;
 983
 984         /* try to get the total cdrom capacity and sector size */
 985         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
 986                                    sense);
 987         if (stat)
 988                 toc->capacity = 0x1fffff;
 989
 990         set_capacity(info->disk, toc->capacity * sectors_per_frame);
 991         /* save a private copy of the TOC capacity for error handling */
 992         drive->probed_capacity = toc->capacity * sectors_per_frame;
 993
 994         blk_queue_logical_block_size(drive->queue,
 995                                      sectors_per_frame << SECTOR_BITS);
 996
 997         /* first read just the header, so we know how long the TOC is */
 998         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
 999                                     sizeof(struct atapi_toc_header), sense);
1000         if (stat)
1001                 return stat;
1002
1003         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1004                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1005                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1006         }
1007
1008         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1009         if (ntracks <= 0)
1010                 return -EIO;
1011         if (ntracks > MAX_TRACKS)
1012                 ntracks = MAX_TRACKS;
1013
1014         /* now read the whole schmeer */
1015         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1016                                   (char *)&toc->hdr,
1017                                    sizeof(struct atapi_toc_header) +
1018                                    (ntracks + 1) *
1019                                    sizeof(struct atapi_toc_entry), sense);
1020
1021         if (stat && toc->hdr.first_track > 1) {
1022                 /*
1023                  * Cds with CDI tracks only don't have any TOC entries, despite
1024                  * of this the returned values are
1025                  * first_track == last_track = number of CDI tracks + 1,
1026                  * so that this case is indistinguishable from the same layout
1027                  * plus an additional audio track. If we get an error for the
1028                  * regular case, we assume a CDI without additional audio
1029                  * tracks. In this case the readable TOC is empty (CDI tracks
1030                  * are not included) and only holds the Leadout entry.
1031                  *
1032                  * Heiko Eißfeldt.
1033                  */
1034                 ntracks = 0;
1035                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1036                                            (char *)&toc->hdr,
1037                                            sizeof(struct atapi_toc_header) +
1038                                            (ntracks + 1) *
1039                                            sizeof(struct atapi_toc_entry),
1040                                            sense);
1041                 if (stat)
1042                         return stat;
1043
1044                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1045                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1046                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1047                 } else {
1048                         toc->hdr.first_track = CDROM_LEADOUT;
1049                         toc->hdr.last_track = CDROM_LEADOUT;
1050                 }
1051         }
1052
1053         if (stat)
1054                 return stat;
1055
1056         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1057
1058         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1059                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1060                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1061         }
1062
1063         for (i = 0; i <= ntracks; i++) {
1064                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1065                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1066                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1067                         msf_from_bcd(&toc->ent[i].addr.msf);
1068                 }
1069                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1070                                                   toc->ent[i].addr.msf.second,
1071                                                   toc->ent[i].addr.msf.frame);
1072         }
1073
1074         if (toc->hdr.first_track != CDROM_LEADOUT) {
1075                 /* read the multisession information */
1076                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1077                                            sizeof(ms_tmp), sense);
1078                 if (stat)
1079                         return stat;
1080
1081                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1082         } else {
1083                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1084                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1085                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1086         }
1087
1088         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1089                 /* re-read multisession information using MSF format */
1090                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1091                                            sizeof(ms_tmp), sense);
1092                 if (stat)
1093                         return stat;
1094
1095                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1096                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1097                                                    ms_tmp.ent.addr.msf.second,
1098                                                    ms_tmp.ent.addr.msf.frame);
1099         }
1100
1101         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1102
1103         /* now try to get the total cdrom capacity */
1104         stat = cdrom_get_last_written(cdi, &last_written);
1105         if (!stat && (last_written > toc->capacity)) {
1106                 toc->capacity = last_written;
1107                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1108                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1109         }
1110
1111         /* Remember that we've read this stuff. */
1112         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1113
1114         return 0;
1115 }
1116
1117 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1118 {
1119         struct cdrom_info *info = drive->driver_data;
1120         struct cdrom_device_info *cdi = &info->devinfo;
1121         struct packet_command cgc;
1122         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1123
1124         ide_debug_log(IDE_DBG_FUNC, "enter");
1125
1126         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1127                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1128
1129         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1130         do {
1131                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1132                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1133                 if (!stat)
1134                         break;
1135         } while (--attempts);
1136         return stat;
1137 }
1138
1139 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1140 {
1141         struct cdrom_info *cd = drive->driver_data;
1142         u16 curspeed, maxspeed;
1143
1144         ide_debug_log(IDE_DBG_FUNC, "enter");
1145
1146         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1147                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1148                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1149         } else {
1150                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1151                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1152         }
1153
1154         ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1155                                      curspeed, maxspeed);
1156
1157         cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176);
1158         cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176);
1159 }
1160
1161 #define IDE_CD_CAPABILITIES \
1162         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1163          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1164          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1165          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1166          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1167
1168 static struct cdrom_device_ops ide_cdrom_dops = {
1169         .open                   = ide_cdrom_open_real,
1170         .release                = ide_cdrom_release_real,
1171         .drive_status           = ide_cdrom_drive_status,
1172         .media_changed          = ide_cdrom_check_media_change_real,
1173         .tray_move              = ide_cdrom_tray_move,
1174         .lock_door              = ide_cdrom_lock_door,
1175         .select_speed           = ide_cdrom_select_speed,
1176         .get_last_session       = ide_cdrom_get_last_session,
1177         .get_mcn                = ide_cdrom_get_mcn,
1178         .reset                  = ide_cdrom_reset,
1179         .audio_ioctl            = ide_cdrom_audio_ioctl,
1180         .capability             = IDE_CD_CAPABILITIES,
1181         .generic_packet         = ide_cdrom_packet,
1182 };
1183
1184 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1185 {
1186         struct cdrom_info *info = drive->driver_data;
1187         struct cdrom_device_info *devinfo = &info->devinfo;
1188
1189         ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1190
1191         devinfo->ops = &ide_cdrom_dops;
1192         devinfo->speed = info->current_speed;
1193         devinfo->capacity = nslots;
1194         devinfo->handle = drive;
1195         strcpy(devinfo->name, drive->name);
1196
1197         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1198                 devinfo->mask |= CDC_SELECT_SPEED;
1199
1200         devinfo->disk = info->disk;
1201         return register_cdrom(devinfo);
1202 }
1203
1204 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1205 {
1206         struct cdrom_info *cd = drive->driver_data;
1207         struct cdrom_device_info *cdi = &cd->devinfo;
1208         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1209         mechtype_t mechtype;
1210         int nslots = 1;
1211
1212         ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1213                                      drive->media, drive->atapi_flags);
1214
1215         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1216                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1217                      CDC_MO_DRIVE | CDC_RAM);
1218
1219         if (drive->media == ide_optical) {
1220                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1221                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1222                                 drive->name);
1223                 return nslots;
1224         }
1225
1226         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1227                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1228                 cdi->mask &= ~CDC_PLAY_AUDIO;
1229                 return nslots;
1230         }
1231
1232         /*
1233          * We have to cheat a little here. the packet will eventually be queued
1234          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1235          * Since this device hasn't been registered with the Uniform layer yet,
1236          * it can't do this. Same goes for cdi->ops.
1237          */
1238         cdi->handle = drive;
1239         cdi->ops = &ide_cdrom_dops;
1240
1241         if (ide_cdrom_get_capabilities(drive, buf))
1242                 return 0;
1243
1244         if ((buf[8 + 6] & 0x01) == 0)
1245                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1246         if (buf[8 + 6] & 0x08)
1247                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1248         if (buf[8 + 3] & 0x01)
1249                 cdi->mask &= ~CDC_CD_R;
1250         if (buf[8 + 3] & 0x02)
1251                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1252         if (buf[8 + 2] & 0x38)
1253                 cdi->mask &= ~CDC_DVD;
1254         if (buf[8 + 3] & 0x20)
1255                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1256         if (buf[8 + 3] & 0x10)
1257                 cdi->mask &= ~CDC_DVD_R;
1258         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1259                 cdi->mask &= ~CDC_PLAY_AUDIO;
1260
1261         mechtype = buf[8 + 6] >> 5;
1262         if (mechtype == mechtype_caddy ||
1263             mechtype == mechtype_popup ||
1264             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1265                 cdi->mask |= CDC_CLOSE_TRAY;
1266
1267         if (cdi->sanyo_slot > 0) {
1268                 cdi->mask &= ~CDC_SELECT_DISC;
1269                 nslots = 3;
1270         } else if (mechtype == mechtype_individual_changer ||
1271                    mechtype == mechtype_cartridge_changer) {
1272                 nslots = cdrom_number_of_slots(cdi);
1273                 if (nslots > 1)
1274                         cdi->mask &= ~CDC_SELECT_DISC;
1275         }
1276
1277         ide_cdrom_update_speed(drive, buf);
1278
1279         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1280
1281         /* don't print speed if the drive reported 0 */
1282         if (cd->max_speed)
1283                 printk(KERN_CONT " %dX", cd->max_speed);
1284
1285         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1286
1287         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1288                 printk(KERN_CONT " DVD%s%s",
1289                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1290                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1291
1292         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1293                 printk(KERN_CONT " CD%s%s",
1294                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1295                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1296
1297         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1298                 printk(KERN_CONT " changer w/%d slots", nslots);
1299         else
1300                 printk(KERN_CONT " drive");
1301
1302         printk(KERN_CONT ", %dkB Cache\n",
1303                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1304
1305         return nslots;
1306 }
1307
1308 /* standard prep_rq_fn that builds 10 byte cmds */
1309 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1310 {
1311         int hard_sect = queue_logical_block_size(q);
1312         long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
1313         unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
1314
1315         memset(rq->cmd, 0, BLK_MAX_CDB);
1316
1317         if (rq_data_dir(rq) == READ)
1318                 rq->cmd[0] = GPCMD_READ_10;
1319         else
1320                 rq->cmd[0] = GPCMD_WRITE_10;
1321
1322         /*
1323          * fill in lba
1324          */
1325         rq->cmd[2] = (block >> 24) & 0xff;
1326         rq->cmd[3] = (block >> 16) & 0xff;
1327         rq->cmd[4] = (block >>  8) & 0xff;
1328         rq->cmd[5] = block & 0xff;
1329
1330         /*
1331          * and transfer length
1332          */
1333         rq->cmd[7] = (blocks >> 8) & 0xff;
1334         rq->cmd[8] = blocks & 0xff;
1335         rq->cmd_len = 10;
1336         return BLKPREP_OK;
1337 }
1338
1339 /*
1340  * Most of the SCSI commands are supported directly by ATAPI devices.
1341  * This transform handles the few exceptions.
1342  */
1343 static int ide_cdrom_prep_pc(struct request *rq)
1344 {
1345         u8 *c = rq->cmd;
1346
1347         /* transform 6-byte read/write commands to the 10-byte version */
1348         if (c[0] == READ_6 || c[0] == WRITE_6) {
1349                 c[8] = c[4];
1350                 c[5] = c[3];
1351                 c[4] = c[2];
1352                 c[3] = c[1] & 0x1f;
1353                 c[2] = 0;
1354                 c[1] &= 0xe0;
1355                 c[0] += (READ_10 - READ_6);
1356                 rq->cmd_len = 10;
1357                 return BLKPREP_OK;
1358         }
1359
1360         /*
1361          * it's silly to pretend we understand 6-byte sense commands, just
1362          * reject with ILLEGAL_REQUEST and the caller should take the
1363          * appropriate action
1364          */
1365         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1366                 rq->errors = ILLEGAL_REQUEST;
1367                 return BLKPREP_KILL;
1368         }
1369
1370         return BLKPREP_OK;
1371 }
1372
1373 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1374 {
1375         if (rq->cmd_type == REQ_TYPE_FS)
1376                 return ide_cdrom_prep_fs(q, rq);
1377         else if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
1378                 return ide_cdrom_prep_pc(rq);
1379
1380         return 0;
1381 }
1382
1383 struct cd_list_entry {
1384         const char      *id_model;
1385         const char      *id_firmware;
1386         unsigned int    cd_flags;
1387 };
1388
1389 #ifdef CONFIG_IDE_PROC_FS
1390 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1391 {
1392         unsigned long capacity, sectors_per_frame;
1393
1394         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1395                 return 0;
1396
1397         return capacity * sectors_per_frame;
1398 }
1399
1400 static int idecd_capacity_proc_show(struct seq_file *m, void *v)
1401 {
1402         ide_drive_t *drive = m->private;
1403
1404         seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive));
1405         return 0;
1406 }
1407
1408 static int idecd_capacity_proc_open(struct inode *inode, struct file *file)
1409 {
1410         return single_open(file, idecd_capacity_proc_show, PDE(inode)->data);
1411 }
1412
1413 static const struct file_operations idecd_capacity_proc_fops = {
1414         .owner          = THIS_MODULE,
1415         .open           = idecd_capacity_proc_open,
1416         .read           = seq_read,
1417         .llseek         = seq_lseek,
1418         .release        = single_release,
1419 };
1420
1421 static ide_proc_entry_t idecd_proc[] = {
1422         { "capacity", S_IFREG|S_IRUGO, &idecd_capacity_proc_fops },
1423         {}
1424 };
1425
1426 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1427 {
1428         return idecd_proc;
1429 }
1430
1431 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1432 {
1433         return NULL;
1434 }
1435 #endif
1436
1437 static const struct cd_list_entry ide_cd_quirks_list[] = {
1438         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1439         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1440         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1441         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1442                                              IDE_AFLAG_PRE_ATAPI12,          },
1443         /* Vertos 300, some versions of this drive like to talk BCD. */
1444         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1445         /* Vertos 600 ESD. */
1446         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1447         /*
1448          * Sanyo 3 CD changer uses a non-standard command for CD changing
1449          * (by default standard ATAPI support for CD changers is used).
1450          */
1451         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1452         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1453         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1454         /* Stingray 8X CD-ROM. */
1455         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1456         /*
1457          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1458          * mode sense page capabilities size, but older drives break.
1459          */
1460         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1461         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1462         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1463         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1464         /*
1465          * Some drives used by Apple don't advertise audio play
1466          * but they do support reading TOC & audio datas.
1467          */
1468         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1469         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1470         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1471         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1472         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1473         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1474         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1475         { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1476         { NULL, NULL, 0 }
1477 };
1478
1479 static unsigned int ide_cd_flags(u16 *id)
1480 {
1481         const struct cd_list_entry *cle = ide_cd_quirks_list;
1482
1483         while (cle->id_model) {
1484                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1485                     (cle->id_firmware == NULL ||
1486                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1487                         return cle->cd_flags;
1488                 cle++;
1489         }
1490
1491         return 0;
1492 }
1493
1494 static int ide_cdrom_setup(ide_drive_t *drive)
1495 {
1496         struct cdrom_info *cd = drive->driver_data;
1497         struct cdrom_device_info *cdi = &cd->devinfo;
1498         struct request_queue *q = drive->queue;
1499         u16 *id = drive->id;
1500         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1501         int nslots;
1502
1503         ide_debug_log(IDE_DBG_PROBE, "enter");
1504
1505         blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1506         blk_queue_dma_alignment(q, 31);
1507         blk_queue_update_dma_pad(q, 15);
1508
1509         q->unplug_delay = max((1 * HZ) / 1000, 1);
1510
1511         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1512         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1513
1514         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1515             fw_rev[4] == '1' && fw_rev[6] <= '2')
1516                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1517                                      IDE_AFLAG_TOCADDR_AS_BCD);
1518         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1519                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1520                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1521         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1522                 /* 3 => use CD in slot 0 */
1523                 cdi->sanyo_slot = 3;
1524
1525         nslots = ide_cdrom_probe_capabilities(drive);
1526
1527         blk_queue_logical_block_size(q, CD_FRAMESIZE);
1528
1529         if (ide_cdrom_register(drive, nslots)) {
1530                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1531                                 " cdrom driver.\n", drive->name, __func__);
1532                 cd->devinfo.handle = NULL;
1533                 return 1;
1534         }
1535
1536         ide_proc_register_driver(drive, cd->driver);
1537         return 0;
1538 }
1539
1540 static void ide_cd_remove(ide_drive_t *drive)
1541 {
1542         struct cdrom_info *info = drive->driver_data;
1543
1544         ide_debug_log(IDE_DBG_FUNC, "enter");
1545
1546         ide_proc_unregister_driver(drive, info->driver);
1547         device_del(&info->dev);
1548         del_gendisk(info->disk);
1549
1550         mutex_lock(&idecd_ref_mutex);
1551         put_device(&info->dev);
1552         mutex_unlock(&idecd_ref_mutex);
1553 }
1554
1555 static void ide_cd_release(struct device *dev)
1556 {
1557         struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1558         struct cdrom_device_info *devinfo = &info->devinfo;
1559         ide_drive_t *drive = info->drive;
1560         struct gendisk *g = info->disk;
1561
1562         ide_debug_log(IDE_DBG_FUNC, "enter");
1563
1564         kfree(info->toc);
1565         if (devinfo->handle == drive)
1566                 unregister_cdrom(devinfo);
1567         drive->driver_data = NULL;
1568         blk_queue_prep_rq(drive->queue, NULL);
1569         g->private_data = NULL;
1570         put_disk(g);
1571         kfree(info);
1572 }
1573
1574 static int ide_cd_probe(ide_drive_t *);
1575
1576 static struct ide_driver ide_cdrom_driver = {
1577         .gen_driver = {
1578                 .owner          = THIS_MODULE,
1579                 .name           = "ide-cdrom",
1580                 .bus            = &ide_bus_type,
1581         },
1582         .probe                  = ide_cd_probe,
1583         .remove                 = ide_cd_remove,
1584         .version                = IDECD_VERSION,
1585         .do_request             = ide_cd_do_request,
1586 #ifdef CONFIG_IDE_PROC_FS
1587         .proc_entries           = ide_cd_proc_entries,
1588         .proc_devsets           = ide_cd_proc_devsets,
1589 #endif
1590 };
1591
1592 static int idecd_open(struct block_device *bdev, fmode_t mode)
1593 {
1594         struct cdrom_info *info;
1595         int rc = -ENXIO;
1596
1597         lock_kernel();
1598         info = ide_cd_get(bdev->bd_disk);
1599         if (!info)
1600                 goto out;
1601
1602         rc = cdrom_open(&info->devinfo, bdev, mode);
1603         if (rc < 0)
1604                 ide_cd_put(info);
1605 out:
1606         unlock_kernel();
1607         return rc;
1608 }
1609
1610 static int idecd_release(struct gendisk *disk, fmode_t mode)
1611 {
1612         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1613
1614         lock_kernel();
1615         cdrom_release(&info->devinfo, mode);
1616
1617         ide_cd_put(info);
1618         unlock_kernel();
1619
1620         return 0;
1621 }
1622
1623 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1624 {
1625         struct packet_command cgc;
1626         char buffer[16];
1627         int stat;
1628         char spindown;
1629
1630         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1631                 return -EFAULT;
1632
1633         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1634
1635         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1636         if (stat)
1637                 return stat;
1638
1639         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1640         return cdrom_mode_select(cdi, &cgc);
1641 }
1642
1643 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1644 {
1645         struct packet_command cgc;
1646         char buffer[16];
1647         int stat;
1648         char spindown;
1649
1650         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1651
1652         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1653         if (stat)
1654                 return stat;
1655
1656         spindown = buffer[11] & 0x0f;
1657         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1658                 return -EFAULT;
1659         return 0;
1660 }
1661
1662 static int idecd_locked_ioctl(struct block_device *bdev, fmode_t mode,
1663                         unsigned int cmd, unsigned long arg)
1664 {
1665         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1666         int err;
1667
1668         switch (cmd) {
1669         case CDROMSETSPINDOWN:
1670                 return idecd_set_spindown(&info->devinfo, arg);
1671         case CDROMGETSPINDOWN:
1672                 return idecd_get_spindown(&info->devinfo, arg);
1673         default:
1674                 break;
1675         }
1676
1677         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1678         if (err == -EINVAL)
1679                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1680
1681         return err;
1682 }
1683
1684 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1685                              unsigned int cmd, unsigned long arg)
1686 {
1687         int ret;
1688
1689         lock_kernel();
1690         ret = idecd_locked_ioctl(bdev, mode, cmd, arg);
1691         unlock_kernel();
1692
1693         return ret;
1694 }
1695
1696
1697 static int idecd_media_changed(struct gendisk *disk)
1698 {
1699         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1700         return cdrom_media_changed(&info->devinfo);
1701 }
1702
1703 static int idecd_revalidate_disk(struct gendisk *disk)
1704 {
1705         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1706         struct request_sense sense;
1707
1708         ide_cd_read_toc(info->drive, &sense);
1709
1710         return  0;
1711 }
1712
1713 static const struct block_device_operations idecd_ops = {
1714         .owner                  = THIS_MODULE,
1715         .open                   = idecd_open,
1716         .release                = idecd_release,
1717         .ioctl                  = idecd_ioctl,
1718         .media_changed          = idecd_media_changed,
1719         .revalidate_disk        = idecd_revalidate_disk
1720 };
1721
1722 /* module options */
1723 static unsigned long debug_mask;
1724 module_param(debug_mask, ulong, 0644);
1725
1726 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1727
1728 static int ide_cd_probe(ide_drive_t *drive)
1729 {
1730         struct cdrom_info *info;
1731         struct gendisk *g;
1732         struct request_sense sense;
1733
1734         ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1735                                      drive->driver_req, drive->media);
1736
1737         if (!strstr("ide-cdrom", drive->driver_req))
1738                 goto failed;
1739
1740         if (drive->media != ide_cdrom && drive->media != ide_optical)
1741                 goto failed;
1742
1743         drive->debug_mask = debug_mask;
1744         drive->irq_handler = cdrom_newpc_intr;
1745
1746         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1747         if (info == NULL) {
1748                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1749                                 drive->name);
1750                 goto failed;
1751         }
1752
1753         g = alloc_disk(1 << PARTN_BITS);
1754         if (!g)
1755                 goto out_free_cd;
1756
1757         ide_init_disk(g, drive);
1758
1759         info->dev.parent = &drive->gendev;
1760         info->dev.release = ide_cd_release;
1761         dev_set_name(&info->dev, dev_name(&drive->gendev));
1762
1763         if (device_register(&info->dev))
1764                 goto out_free_disk;
1765
1766         info->drive = drive;
1767         info->driver = &ide_cdrom_driver;
1768         info->disk = g;
1769
1770         g->private_data = &info->driver;
1771
1772         drive->driver_data = info;
1773
1774         g->minors = 1;
1775         g->driverfs_dev = &drive->gendev;
1776         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1777         if (ide_cdrom_setup(drive)) {
1778                 put_device(&info->dev);
1779                 goto failed;
1780         }
1781
1782         ide_cd_read_toc(drive, &sense);
1783         g->fops = &idecd_ops;
1784         g->flags |= GENHD_FL_REMOVABLE;
1785         add_disk(g);
1786         return 0;
1787
1788 out_free_disk:
1789         put_disk(g);
1790 out_free_cd:
1791         kfree(info);
1792 failed:
1793         return -ENODEV;
1794 }
1795
1796 static void __exit ide_cdrom_exit(void)
1797 {
1798         driver_unregister(&ide_cdrom_driver.gen_driver);
1799 }
1800
1801 static int __init ide_cdrom_init(void)
1802 {
1803         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1804         return driver_register(&ide_cdrom_driver.gen_driver);
1805 }
1806
1807 MODULE_ALIAS("ide:*m-cdrom*");
1808 MODULE_ALIAS("ide-cd");
1809 module_init(ide_cdrom_init);
1810 module_exit(ide_cdrom_exit);
1811 MODULE_LICENSE("GPL");