drivers/ide/ide-cd.c

   1 /*
   2  * ATAPI CD-ROM driver.
   3  *
   4  * Copyright (C) 1994-1996   Scott Snyder <snyder@fnald0.fnal.gov>
   5  * Copyright (C) 1996-1998   Erik Andersen <andersee@debian.org>
   6  * Copyright (C) 1998-2000   Jens Axboe <axboe@suse.de>
   7  * Copyright (C) 2005, 2007-2009  Bartlomiej Zolnierkiewicz
   8  *
   9  * May be copied or modified under the terms of the GNU General Public
  10  * License.  See linux/COPYING for more information.
  11  *
  12  * See Documentation/cdrom/ide-cd for usage information.
  13  *
  14  * Suggestions are welcome. Patches that work are more welcome though. ;-)
  15  *
  16  * Documentation:
  17  *      Mt. Fuji (SFF8090 version 4) and ATAPI (SFF-8020i rev 2.6) standards.
  18  *
  19  * For historical changelog please see:
  20  *      Documentation/ide/ChangeLog.ide-cd.1994-2004
  21  */
  22
  23 #define DRV_NAME "ide-cd"
  24 #define PFX DRV_NAME ": "
  25
  26 #define IDECD_VERSION "5.00"
  27
  28 #include <linux/module.h>
  29 #include <linux/types.h>
  30 #include <linux/kernel.h>
  31 #include <linux/delay.h>
  32 #include <linux/timer.h>
  33 #include <linux/slab.h>
  34 #include <linux/interrupt.h>
  35 #include <linux/errno.h>
  36 #include <linux/cdrom.h>
  37 #include <linux/ide.h>
  38 #include <linux/completion.h>
  39 #include <linux/mutex.h>
  40 #include <linux/bcd.h>
  41
  42 /* For SCSI -> ATAPI command conversion */
  43 #include <scsi/scsi.h>
  44
  45 #include <linux/irq.h>
  46 #include <linux/io.h>
  47 #include <asm/byteorder.h>
  48 #include <linux/uaccess.h>
  49 #include <asm/unaligned.h>
  50
  51 #include "ide-cd.h"
  52
  53 static DEFINE_MUTEX(idecd_ref_mutex);
  54
  55 static void ide_cd_release(struct device *);
  56
  57 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
  58 {
  59         struct cdrom_info *cd = NULL;
  60
  61         mutex_lock(&idecd_ref_mutex);
  62         cd = ide_drv_g(disk, cdrom_info);
  63         if (cd) {
  64                 if (ide_device_get(cd->drive))
  65                         cd = NULL;
  66                 else
  67                         get_device(&cd->dev);
  68
  69         }
  70         mutex_unlock(&idecd_ref_mutex);
  71         return cd;
  72 }
  73
  74 static void ide_cd_put(struct cdrom_info *cd)
  75 {
  76         ide_drive_t *drive = cd->drive;
  77
  78         mutex_lock(&idecd_ref_mutex);
  79         put_device(&cd->dev);
  80         ide_device_put(drive);
  81         mutex_unlock(&idecd_ref_mutex);
  82 }
  83
  84 /*
  85  * Generic packet command support and error handling routines.
  86  */
  87
  88 /* Mark that we've seen a media change and invalidate our internal buffers. */
  89 static void cdrom_saw_media_change(ide_drive_t *drive)
  90 {
  91         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
  92         drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
  93 }
  94
  95 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq)
  96 {
  97         struct request_sense *sense = &drive->sense_data;
  98         int log = 0;
  99
 100         if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
 101                 return 0;
 102
 103         ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
 104
 105         switch (sense->sense_key) {
 106         case NO_SENSE:
 107         case RECOVERED_ERROR:
 108                 break;
 109         case NOT_READY:
 110                 /*
 111                  * don't care about tray state messages for e.g. capacity
 112                  * commands or in-progress or becoming ready
 113                  */
 114                 if (sense->asc == 0x3a || sense->asc == 0x04)
 115                         break;
 116                 log = 1;
 117                 break;
 118         case ILLEGAL_REQUEST:
 119                 /*
 120                  * don't log START_STOP unit with LoEj set, since we cannot
 121                  * reliably check if drive can auto-close
 122                  */
 123                 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
 124                         break;
 125                 log = 1;
 126                 break;
 127         case UNIT_ATTENTION:
 128                 /*
 129                  * Make good and sure we've seen this potential media change.
 130                  * Some drives (i.e. Creative) fail to present the correct sense
 131                  * key in the error register.
 132                  */
 133                 cdrom_saw_media_change(drive);
 134                 break;
 135         default:
 136                 log = 1;
 137                 break;
 138         }
 139         return log;
 140 }
 141
 142 static void cdrom_analyze_sense_data(ide_drive_t *drive,
 143                                      struct request *failed_command)
 144 {
 145         struct request_sense *sense = &drive->sense_data;
 146         struct cdrom_info *info = drive->driver_data;
 147         unsigned long sector;
 148         unsigned long bio_sectors;
 149
 150         ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
 151                                      sense->error_code, sense->sense_key);
 152
 153         if (failed_command)
 154                 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
 155                                              failed_command->cmd[0]);
 156
 157         if (!cdrom_log_sense(drive, failed_command))
 158                 return;
 159
 160         /*
 161          * If a read toc is executed for a CD-R or CD-RW medium where the first
 162          * toc has not been recorded yet, it will fail with 05/24/00 (which is a
 163          * confusing error)
 164          */
 165         if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
 166                 if (sense->sense_key == 0x05 && sense->asc == 0x24)
 167                         return;
 168
 169         /* current error */
 170         if (sense->error_code == 0x70) {
 171                 switch (sense->sense_key) {
 172                 case MEDIUM_ERROR:
 173                 case VOLUME_OVERFLOW:
 174                 case ILLEGAL_REQUEST:
 175                         if (!sense->valid)
 176                                 break;
 177                         if (failed_command == NULL ||
 178                                         !blk_fs_request(failed_command))
 179                                 break;
 180                         sector = (sense->information[0] << 24) |
 181                                  (sense->information[1] << 16) |
 182                                  (sense->information[2] <<  8) |
 183                                  (sense->information[3]);
 184
 185                         if (queue_logical_block_size(drive->queue) == 2048)
 186                                 /* device sector size is 2K */
 187                                 sector <<= 2;
 188
 189                         bio_sectors = max(bio_sectors(failed_command->bio), 4U);
 190                         sector &= ~(bio_sectors - 1);
 191
 192                         /*
 193                          * The SCSI specification allows for the value
 194                          * returned by READ CAPACITY to be up to 75 2K
 195                          * sectors past the last readable block.
 196                          * Therefore, if we hit a medium error within the
 197                          * last 75 2K sectors, we decrease the saved size
 198                          * value.
 199                          */
 200                         if (sector < get_capacity(info->disk) &&
 201                             drive->probed_capacity - sector < 4 * 75)
 202                                 set_capacity(info->disk, sector);
 203                 }
 204         }
 205
 206         ide_cd_log_error(drive->name, failed_command, sense);
 207 }
 208
 209 static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
 210 {
 211         /*
 212          * For REQ_TYPE_SENSE, "rq->special" points to the original
 213          * failed request.  Also, the sense data should be read
 214          * directly from rq which might be different from the original
 215          * sense buffer if it got copied during mapping.
 216          */
 217         struct request *failed = (struct request *)rq->special;
 218         void *sense = bio_data(rq->bio);
 219
 220         if (failed) {
 221                 if (failed->sense) {
 222                         /*
 223                          * Sense is always read into drive->sense_data.
 224                          * Copy back if the failed request has its
 225                          * sense pointer set.
 226                          */
 227                         memcpy(failed->sense, sense, 18);
 228                         failed->sense_len = rq->sense_len;
 229                 }
 230                 cdrom_analyze_sense_data(drive, failed);
 231
 232                 if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
 233                         BUG();
 234         } else
 235                 cdrom_analyze_sense_data(drive, NULL);
 236 }
 237
 238
 239 /*
 240  * Allow the drive 5 seconds to recover; some devices will return NOT_READY
 241  * while flushing data from cache.
 242  *
 243  * returns: 0 failed (write timeout expired)
 244  *          1 success
 245  */
 246 static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
 247 {
 248
 249         struct cdrom_info *info = drive->driver_data;
 250
 251         if (!rq->errors)
 252                 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
 253
 254         rq->errors = 1;
 255
 256         if (time_after(jiffies, info->write_timeout))
 257                 return 0;
 258         else {
 259                 struct request_queue *q = drive->queue;
 260                 unsigned long flags;
 261
 262                 /*
 263                  * take a breather relying on the unplug timer to kick us again
 264                  */
 265
 266                 spin_lock_irqsave(q->queue_lock, flags);
 267                 blk_plug_device(q);
 268                 spin_unlock_irqrestore(q->queue_lock, flags);
 269
 270                 return 1;
 271         }
 272 }
 273
 274 /**
 275  * Returns:
 276  * 0: if the request should be continued.
 277  * 1: if the request will be going through error recovery.
 278  * 2: if the request should be ended.
 279  */
 280 static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 281 {
 282         ide_hwif_t *hwif = drive->hwif;
 283         struct request *rq = hwif->rq;
 284         int err, sense_key, do_end_request = 0;
 285
 286         /* get the IDE error register */
 287         err = ide_read_error(drive);
 288         sense_key = err >> 4;
 289
 290         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
 291                                   "stat 0x%x",
 292                                   rq->cmd[0], rq->cmd_type, err, stat);
 293
 294         if (blk_sense_request(rq)) {
 295                 /*
 296                  * We got an error trying to get sense info from the drive
 297                  * (probably while trying to recover from a former error).
 298                  * Just give up.
 299                  */
 300                 rq->cmd_flags |= REQ_FAILED;
 301                 return 2;
 302         }
 303
 304         /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
 305         if (blk_pc_request(rq) && !rq->errors)
 306                 rq->errors = SAM_STAT_CHECK_CONDITION;
 307
 308         if (blk_noretry_request(rq))
 309                 do_end_request = 1;
 310
 311         switch (sense_key) {
 312         case NOT_READY:
 313                 if (blk_fs_request(rq) && rq_data_dir(rq) == WRITE) {
 314                         if (ide_cd_breathe(drive, rq))
 315                                 return 1;
 316                 } else {
 317                         cdrom_saw_media_change(drive);
 318
 319                         if (blk_fs_request(rq) && !blk_rq_quiet(rq))
 320                                 printk(KERN_ERR PFX "%s: tray open\n",
 321                                         drive->name);
 322                 }
 323                 do_end_request = 1;
 324                 break;
 325         case UNIT_ATTENTION:
 326                 cdrom_saw_media_change(drive);
 327
 328                 if (blk_fs_request(rq) == 0)
 329                         return 0;
 330
 331                 /*
 332                  * Arrange to retry the request but be sure to give up if we've
 333                  * retried too many times.
 334                  */
 335                 if (++rq->errors > ERROR_MAX)
 336                         do_end_request = 1;
 337                 break;
 338         case ILLEGAL_REQUEST:
 339                 /*
 340                  * Don't print error message for this condition -- SFF8090i
 341                  * indicates that 5/24/00 is the correct response to a request
 342                  * to close the tray if the drive doesn't have that capability.
 343                  *
 344                  * cdrom_log_sense() knows this!
 345                  */
 346                 if (rq->cmd[0] == GPCMD_START_STOP_UNIT)
 347                         break;
 348                 /* fall-through */
 349         case DATA_PROTECT:
 350                 /*
 351                  * No point in retrying after an illegal request or data
 352                  * protect error.
 353                  */
 354                 if (!blk_rq_quiet(rq))
 355                         ide_dump_status(drive, "command error", stat);
 356                 do_end_request = 1;
 357                 break;
 358         case MEDIUM_ERROR:
 359                 /*
 360                  * No point in re-trying a zillion times on a bad sector.
 361                  * If we got here the error is not correctable.
 362                  */
 363                 if (!blk_rq_quiet(rq))
 364                         ide_dump_status(drive, "media error "
 365                                         "(bad sector)", stat);
 366                 do_end_request = 1;
 367                 break;
 368         case BLANK_CHECK:
 369                 /* disk appears blank? */
 370                 if (!blk_rq_quiet(rq))
 371                         ide_dump_status(drive, "media error (blank)",
 372                                         stat);
 373                 do_end_request = 1;
 374                 break;
 375         default:
 376                 if (blk_fs_request(rq) == 0)
 377                         break;
 378                 if (err & ~ATA_ABORTED) {
 379                         /* go to the default handler for other errors */
 380                         ide_error(drive, "cdrom_decode_status", stat);
 381                         return 1;
 382                 } else if (++rq->errors > ERROR_MAX)
 383                         /* we've racked up too many retries, abort */
 384                         do_end_request = 1;
 385         }
 386
 387         if (blk_fs_request(rq) == 0) {
 388                 rq->cmd_flags |= REQ_FAILED;
 389                 do_end_request = 1;
 390         }
 391
 392         /*
 393          * End a request through request sense analysis when we have sense data.
 394          * We need this in order to perform end of media processing.
 395          */
 396         if (do_end_request)
 397                 goto end_request;
 398
 399         /* if we got a CHECK_CONDITION status, queue a request sense command */
 400         if (stat & ATA_ERR)
 401                 return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
 402         return 1;
 403
 404 end_request:
 405         if (stat & ATA_ERR) {
 406                 hwif->rq = NULL;
 407                 return ide_queue_sense_rq(drive, rq) ? 2 : 1;
 408         } else
 409                 return 2;
 410 }
 411
 412 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
 413 {
 414         struct request *rq = cmd->rq;
 415
 416         ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
 417
 418         /*
 419          * Some of the trailing request sense fields are optional,
 420          * and some drives don't send them.  Sigh.
 421          */
 422         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 423             cmd->nleft > 0 && cmd->nleft <= 5)
 424                 cmd->nleft = 0;
 425 }
 426
 427 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 428                     int write, void *buffer, unsigned *bufflen,
 429                     struct request_sense *sense, int timeout,
 430                     unsigned int cmd_flags)
 431 {
 432         struct cdrom_info *info = drive->driver_data;
 433         struct request_sense local_sense;
 434         int retries = 10;
 435         unsigned int flags = 0;
 436
 437         if (!sense)
 438                 sense = &local_sense;
 439
 440         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
 441                                   "cmd_flags: 0x%x",
 442                                   cmd[0], write, timeout, cmd_flags);
 443
 444         /* start of retry loop */
 445         do {
 446                 struct request *rq;
 447                 int error;
 448
 449                 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
 450
 451                 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
 452                 rq->cmd_type = REQ_TYPE_ATA_PC;
 453                 rq->sense = sense;
 454                 rq->cmd_flags |= cmd_flags;
 455                 rq->timeout = timeout;
 456                 if (buffer) {
 457                         error = blk_rq_map_kern(drive->queue, rq, buffer,
 458                                                 *bufflen, GFP_NOIO);
 459                         if (error) {
 460                                 blk_put_request(rq);
 461                                 return error;
 462                         }
 463                 }
 464
 465                 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 466
 467                 if (buffer)
 468                         *bufflen = rq->resid_len;
 469
 470                 flags = rq->cmd_flags;
 471                 blk_put_request(rq);
 472
 473                 /*
 474                  * FIXME: we should probably abort/retry or something in case of
 475                  * failure.
 476                  */
 477                 if (flags & REQ_FAILED) {
 478                         /*
 479                          * The request failed.  Retry if it was due to a unit
 480                          * attention status (usually means media was changed).
 481                          */
 482                         struct request_sense *reqbuf = sense;
 483
 484                         if (reqbuf->sense_key == UNIT_ATTENTION)
 485                                 cdrom_saw_media_change(drive);
 486                         else if (reqbuf->sense_key == NOT_READY &&
 487                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 488                                 /*
 489                                  * The drive is in the process of loading
 490                                  * a disk.  Retry, but wait a little to give
 491                                  * the drive time to complete the load.
 492                                  */
 493                                 ssleep(2);
 494                         } else {
 495                                 /* otherwise, don't retry */
 496                                 retries = 0;
 497                         }
 498                         --retries;
 499                 }
 500
 501                 /* end of retry loop */
 502         } while ((flags & REQ_FAILED) && retries >= 0);
 503
 504         /* return an error if the command failed */
 505         return (flags & REQ_FAILED) ? -EIO : 0;
 506 }
 507
 508 static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 509 {
 510         unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
 511
 512         if (cmd->tf_flags & IDE_TFLAG_WRITE)
 513                 nr_bytes -= cmd->last_xfer_len;
 514
 515         if (nr_bytes > 0)
 516                 ide_complete_rq(drive, 0, nr_bytes);
 517 }
 518
 519 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 520 {
 521         ide_hwif_t *hwif = drive->hwif;
 522         struct ide_cmd *cmd = &hwif->cmd;
 523         struct request *rq = hwif->rq;
 524         ide_expiry_t *expiry = NULL;
 525         int dma_error = 0, dma, thislen, uptodate = 0;
 526         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
 527         int sense = blk_sense_request(rq);
 528         unsigned int timeout;
 529         u16 len;
 530         u8 ireason, stat;
 531
 532         ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
 533
 534         /* check for errors */
 535         dma = drive->dma;
 536         if (dma) {
 537                 drive->dma = 0;
 538                 drive->waiting_for_dma = 0;
 539                 dma_error = hwif->dma_ops->dma_end(drive);
 540                 ide_dma_unmap_sg(drive, cmd);
 541                 if (dma_error) {
 542                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 543                                         write ? "write" : "read");
 544                         ide_dma_off(drive);
 545                 }
 546         }
 547
 548         /* check status */
 549         stat = hwif->tp_ops->read_status(hwif);
 550
 551         if (!OK_STAT(stat, 0, BAD_R_STAT)) {
 552                 rc = cdrom_decode_status(drive, stat);
 553                 if (rc) {
 554                         if (rc == 2)
 555                                 goto out_end;
 556                         return ide_stopped;
 557                 }
 558         }
 559
 560         /* using dma, transfer is complete now */
 561         if (dma) {
 562                 if (dma_error)
 563                         return ide_error(drive, "dma error", stat);
 564                 uptodate = 1;
 565                 goto out_end;
 566         }
 567
 568         ide_read_bcount_and_ireason(drive, &len, &ireason);
 569
 570         thislen = blk_fs_request(rq) ? len : cmd->nleft;
 571         if (thislen > len)
 572                 thislen = len;
 573
 574         ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
 575                                   stat, thislen);
 576
 577         /* If DRQ is clear, the command has completed. */
 578         if ((stat & ATA_DRQ) == 0) {
 579                 if (blk_fs_request(rq)) {
 580                         /*
 581                          * If we're not done reading/writing, complain.
 582                          * Otherwise, complete the command normally.
 583                          */
 584                         uptodate = 1;
 585                         if (cmd->nleft > 0) {
 586                                 printk(KERN_ERR PFX "%s: %s: data underrun "
 587                                         "(%u bytes)\n", drive->name, __func__,
 588                                         cmd->nleft);
 589                                 if (!write)
 590                                         rq->cmd_flags |= REQ_FAILED;
 591                                 uptodate = 0;
 592                         }
 593                 } else if (!blk_pc_request(rq)) {
 594                         ide_cd_request_sense_fixup(drive, cmd);
 595
 596                         uptodate = cmd->nleft ? 0 : 1;
 597
 598                         /*
 599                          * suck out the remaining bytes from the drive in an
 600                          * attempt to complete the data xfer. (see BZ#13399)
 601                          */
 602                         if (!(stat & ATA_ERR) && !uptodate && thislen) {
 603                                 ide_pio_bytes(drive, cmd, write, thislen);
 604                                 uptodate = cmd->nleft ? 0 : 1;
 605                         }
 606
 607                         if (!uptodate)
 608                                 rq->cmd_flags |= REQ_FAILED;
 609                 }
 610                 goto out_end;
 611         }
 612
 613         rc = ide_check_ireason(drive, rq, len, ireason, write);
 614         if (rc)
 615                 goto out_end;
 616
 617         cmd->last_xfer_len = 0;
 618
 619         ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
 620                                   "ireason: 0x%x",
 621                                   rq->cmd_type, ireason);
 622
 623         /* transfer data */
 624         while (thislen > 0) {
 625                 int blen = min_t(int, thislen, cmd->nleft);
 626
 627                 if (cmd->nleft == 0)
 628                         break;
 629
 630                 ide_pio_bytes(drive, cmd, write, blen);
 631                 cmd->last_xfer_len += blen;
 632
 633                 thislen -= blen;
 634                 len -= blen;
 635
 636                 if (sense && write == 0)
 637                         rq->sense_len += blen;
 638         }
 639
 640         /* pad, if necessary */
 641         if (len > 0) {
 642                 if (blk_fs_request(rq) == 0 || write == 0)
 643                         ide_pad_transfer(drive, write, len);
 644                 else {
 645                         printk(KERN_ERR PFX "%s: confused, missing data\n",
 646                                 drive->name);
 647                         blk_dump_rq_flags(rq, "cdrom_newpc_intr");
 648                 }
 649         }
 650
 651         if (blk_pc_request(rq)) {
 652                 timeout = rq->timeout;
 653         } else {
 654                 timeout = ATAPI_WAIT_PC;
 655                 if (!blk_fs_request(rq))
 656                         expiry = ide_cd_expiry;
 657         }
 658
 659         hwif->expiry = expiry;
 660         ide_set_handler(drive, cdrom_newpc_intr, timeout);
 661         return ide_started;
 662
 663 out_end:
 664         if (blk_pc_request(rq) && rc == 0) {
 665                 rq->resid_len = 0;
 666                 blk_end_request_all(rq, 0);
 667                 hwif->rq = NULL;
 668         } else {
 669                 if (sense && uptodate)
 670                         ide_cd_complete_failed_rq(drive, rq);
 671
 672                 if (blk_fs_request(rq)) {
 673                         if (cmd->nleft == 0)
 674                                 uptodate = 1;
 675                 } else {
 676                         if (uptodate <= 0 && rq->errors == 0)
 677                                 rq->errors = -EIO;
 678                 }
 679
 680                 if (uptodate == 0 && rq->bio)
 681                         ide_cd_error_cmd(drive, cmd);
 682
 683                 /* make sure it's fully ended */
 684                 if (blk_fs_request(rq) == 0) {
 685                         rq->resid_len -= cmd->nbytes - cmd->nleft;
 686                         if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
 687                                 rq->resid_len += cmd->last_xfer_len;
 688                 }
 689
 690                 ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq));
 691
 692                 if (sense && rc == 2)
 693                         ide_error(drive, "request sense failure", stat);
 694         }
 695         return ide_stopped;
 696 }
 697
 698 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 699 {
 700         struct cdrom_info *cd = drive->driver_data;
 701         struct request_queue *q = drive->queue;
 702         int write = rq_data_dir(rq) == WRITE;
 703         unsigned short sectors_per_frame =
 704                 queue_logical_block_size(q) >> SECTOR_BITS;
 705
 706         ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
 707                                   "secs_per_frame: %u",
 708                                   rq->cmd[0], rq->cmd_flags, sectors_per_frame);
 709
 710         if (write) {
 711                 /* disk has become write protected */
 712                 if (get_disk_ro(cd->disk))
 713                         return ide_stopped;
 714         } else {
 715                 /*
 716                  * We may be retrying this request after an error.  Fix up any
 717                  * weirdness which might be present in the request packet.
 718                  */
 719                 q->prep_rq_fn(q, rq);
 720         }
 721
 722         /* fs requests *must* be hardware frame aligned */
 723         if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
 724             (blk_rq_pos(rq) & (sectors_per_frame - 1)))
 725                 return ide_stopped;
 726
 727         /* use DMA, if possible */
 728         drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 729
 730         if (write)
 731                 cd->devinfo.media_written = 1;
 732
 733         rq->timeout = ATAPI_WAIT_PC;
 734
 735         return ide_started;
 736 }
 737
 738 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
 739 {
 740
 741         ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
 742                                   rq->cmd[0], rq->cmd_type);
 743
 744         if (blk_pc_request(rq))
 745                 rq->cmd_flags |= REQ_QUIET;
 746         else
 747                 rq->cmd_flags &= ~REQ_FAILED;
 748
 749         drive->dma = 0;
 750
 751         /* sg request */
 752         if (rq->bio) {
 753                 struct request_queue *q = drive->queue;
 754                 char *buf = bio_data(rq->bio);
 755                 unsigned int alignment;
 756
 757                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 758
 759                 /*
 760                  * check if dma is safe
 761                  *
 762                  * NOTE! The "len" and "addr" checks should possibly have
 763                  * separate masks.
 764                  */
 765                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
 766                 if ((unsigned long)buf & alignment
 767                     || blk_rq_bytes(rq) & q->dma_pad_mask
 768                     || object_is_on_stack(buf))
 769                         drive->dma = 0;
 770         }
 771 }
 772
 773 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
 774                                         sector_t block)
 775 {
 776         struct ide_cmd cmd;
 777         int uptodate = 0, nsectors;
 778
 779         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
 780                                   rq->cmd[0], (unsigned long long)block);
 781
 782         if (drive->debug_mask & IDE_DBG_RQ)
 783                 blk_dump_rq_flags(rq, "ide_cd_do_request");
 784
 785         if (blk_fs_request(rq)) {
 786                 if (cdrom_start_rw(drive, rq) == ide_stopped)
 787                         goto out_end;
 788         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
 789                    rq->cmd_type == REQ_TYPE_ATA_PC) {
 790                 if (!rq->timeout)
 791                         rq->timeout = ATAPI_WAIT_PC;
 792
 793                 cdrom_do_block_pc(drive, rq);
 794         } else if (blk_special_request(rq)) {
 795                 /* right now this can only be a reset... */
 796                 uptodate = 1;
 797                 goto out_end;
 798         } else
 799                 BUG();
 800
 801         /* prepare sense request for this command */
 802         ide_prep_sense(drive, rq);
 803
 804         memset(&cmd, 0, sizeof(cmd));
 805
 806         if (rq_data_dir(rq))
 807                 cmd.tf_flags |= IDE_TFLAG_WRITE;
 808
 809         cmd.rq = rq;
 810
 811         if (blk_fs_request(rq) || blk_rq_bytes(rq)) {
 812                 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
 813                 ide_map_sg(drive, &cmd);
 814         }
 815
 816         return ide_issue_pc(drive, &cmd);
 817 out_end:
 818         nsectors = blk_rq_sectors(rq);
 819
 820         if (nsectors == 0)
 821                 nsectors = 1;
 822
 823         ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
 824
 825         return ide_stopped;
 826 }
 827
 828 /*
 829  * Ioctl handling.
 830  *
 831  * Routines which queue packet commands take as a final argument a pointer to a
 832  * request_sense struct. If execution of the command results in an error with a
 833  * CHECK CONDITION status, this structure will be filled with the results of the
 834  * subsequent request sense command. The pointer can also be NULL, in which case
 835  * no sense information is returned.
 836  */
 837 static void msf_from_bcd(struct atapi_msf *msf)
 838 {
 839         msf->minute = bcd2bin(msf->minute);
 840         msf->second = bcd2bin(msf->second);
 841         msf->frame  = bcd2bin(msf->frame);
 842 }
 843
 844 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
 845 {
 846         struct cdrom_info *info = drive->driver_data;
 847         struct cdrom_device_info *cdi = &info->devinfo;
 848         unsigned char cmd[BLK_MAX_CDB];
 849
 850         ide_debug_log(IDE_DBG_FUNC, "enter");
 851
 852         memset(cmd, 0, BLK_MAX_CDB);
 853         cmd[0] = GPCMD_TEST_UNIT_READY;
 854
 855         /*
 856          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
 857          * instead of supporting the LOAD_UNLOAD opcode.
 858          */
 859         cmd[7] = cdi->sanyo_slot % 3;
 860
 861         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
 862 }
 863
 864 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
 865                                unsigned long *sectors_per_frame,
 866                                struct request_sense *sense)
 867 {
 868         struct {
 869                 __be32 lba;
 870                 __be32 blocklen;
 871         } capbuf;
 872
 873         int stat;
 874         unsigned char cmd[BLK_MAX_CDB];
 875         unsigned len = sizeof(capbuf);
 876         u32 blocklen;
 877
 878         ide_debug_log(IDE_DBG_FUNC, "enter");
 879
 880         memset(cmd, 0, BLK_MAX_CDB);
 881         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
 882
 883         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
 884                                REQ_QUIET);
 885         if (stat)
 886                 return stat;
 887
 888         /*
 889          * Sanity check the given block size, in so far as making
 890          * sure the sectors_per_frame we give to the caller won't
 891          * end up being bogus.
 892          */
 893         blocklen = be32_to_cpu(capbuf.blocklen);
 894         blocklen = (blocklen >> SECTOR_BITS) << SECTOR_BITS;
 895         switch (blocklen) {
 896         case 512:
 897         case 1024:
 898         case 2048:
 899         case 4096:
 900                 break;
 901         default:
 902                 printk_once(KERN_ERR PFX "%s: weird block size %u; "
 903                                 "setting default block size to 2048\n",
 904                                 drive->name, blocklen);
 905                 blocklen = 2048;
 906                 break;
 907         }
 908
 909         *capacity = 1 + be32_to_cpu(capbuf.lba);
 910         *sectors_per_frame = blocklen >> SECTOR_BITS;
 911
 912         ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
 913                                      *capacity, *sectors_per_frame);
 914
 915         return 0;
 916 }
 917
 918 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
 919                                 int format, char *buf, int buflen,
 920                                 struct request_sense *sense)
 921 {
 922         unsigned char cmd[BLK_MAX_CDB];
 923
 924         ide_debug_log(IDE_DBG_FUNC, "enter");
 925
 926         memset(cmd, 0, BLK_MAX_CDB);
 927
 928         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
 929         cmd[6] = trackno;
 930         cmd[7] = (buflen >> 8);
 931         cmd[8] = (buflen & 0xff);
 932         cmd[9] = (format << 6);
 933
 934         if (msf_flag)
 935                 cmd[1] = 2;
 936
 937         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
 938 }
 939
 940 /* Try to read the entire TOC for the disk into our internal buffer. */
 941 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
 942 {
 943         int stat, ntracks, i;
 944         struct cdrom_info *info = drive->driver_data;
 945         struct cdrom_device_info *cdi = &info->devinfo;
 946         struct atapi_toc *toc = info->toc;
 947         struct {
 948                 struct atapi_toc_header hdr;
 949                 struct atapi_toc_entry  ent;
 950         } ms_tmp;
 951         long last_written;
 952         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
 953
 954         ide_debug_log(IDE_DBG_FUNC, "enter");
 955
 956         if (toc == NULL) {
 957                 /* try to allocate space */
 958                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
 959                 if (toc == NULL) {
 960                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
 961                                         drive->name);
 962                         return -ENOMEM;
 963                 }
 964                 info->toc = toc;
 965         }
 966
 967         /*
 968          * Check to see if the existing data is still valid. If it is,
 969          * just return.
 970          */
 971         (void) cdrom_check_status(drive, sense);
 972
 973         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
 974                 return 0;
 975
 976         /* try to get the total cdrom capacity and sector size */
 977         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
 978                                    sense);
 979         if (stat)
 980                 toc->capacity = 0x1fffff;
 981
 982         set_capacity(info->disk, toc->capacity * sectors_per_frame);
 983         /* save a private copy of the TOC capacity for error handling */
 984         drive->probed_capacity = toc->capacity * sectors_per_frame;
 985
 986         blk_queue_logical_block_size(drive->queue,
 987                                      sectors_per_frame << SECTOR_BITS);
 988
 989         /* first read just the header, so we know how long the TOC is */
 990         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
 991                                     sizeof(struct atapi_toc_header), sense);
 992         if (stat)
 993                 return stat;
 994
 995         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
 996                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
 997                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
 998         }
 999
1000         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1001         if (ntracks <= 0)
1002                 return -EIO;
1003         if (ntracks > MAX_TRACKS)
1004                 ntracks = MAX_TRACKS;
1005
1006         /* now read the whole schmeer */
1007         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1008                                   (char *)&toc->hdr,
1009                                    sizeof(struct atapi_toc_header) +
1010                                    (ntracks + 1) *
1011                                    sizeof(struct atapi_toc_entry), sense);
1012
1013         if (stat && toc->hdr.first_track > 1) {
1014                 /*
1015                  * Cds with CDI tracks only don't have any TOC entries, despite
1016                  * of this the returned values are
1017                  * first_track == last_track = number of CDI tracks + 1,
1018                  * so that this case is indistinguishable from the same layout
1019                  * plus an additional audio track. If we get an error for the
1020                  * regular case, we assume a CDI without additional audio
1021                  * tracks. In this case the readable TOC is empty (CDI tracks
1022                  * are not included) and only holds the Leadout entry.
1023                  *
1024                  * Heiko Eißfeldt.
1025                  */
1026                 ntracks = 0;
1027                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1028                                            (char *)&toc->hdr,
1029                                            sizeof(struct atapi_toc_header) +
1030                                            (ntracks + 1) *
1031                                            sizeof(struct atapi_toc_entry),
1032                                            sense);
1033                 if (stat)
1034                         return stat;
1035
1036                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1037                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1038                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1039                 } else {
1040                         toc->hdr.first_track = CDROM_LEADOUT;
1041                         toc->hdr.last_track = CDROM_LEADOUT;
1042                 }
1043         }
1044
1045         if (stat)
1046                 return stat;
1047
1048         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1049
1050         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1051                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1052                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1053         }
1054
1055         for (i = 0; i <= ntracks; i++) {
1056                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1057                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1058                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1059                         msf_from_bcd(&toc->ent[i].addr.msf);
1060                 }
1061                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1062                                                   toc->ent[i].addr.msf.second,
1063                                                   toc->ent[i].addr.msf.frame);
1064         }
1065
1066         if (toc->hdr.first_track != CDROM_LEADOUT) {
1067                 /* read the multisession information */
1068                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1069                                            sizeof(ms_tmp), sense);
1070                 if (stat)
1071                         return stat;
1072
1073                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1074         } else {
1075                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1076                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1077                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1078         }
1079
1080         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1081                 /* re-read multisession information using MSF format */
1082                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1083                                            sizeof(ms_tmp), sense);
1084                 if (stat)
1085                         return stat;
1086
1087                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1088                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1089                                                    ms_tmp.ent.addr.msf.second,
1090                                                    ms_tmp.ent.addr.msf.frame);
1091         }
1092
1093         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1094
1095         /* now try to get the total cdrom capacity */
1096         stat = cdrom_get_last_written(cdi, &last_written);
1097         if (!stat && (last_written > toc->capacity)) {
1098                 toc->capacity = last_written;
1099                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1100                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1101         }
1102
1103         /* Remember that we've read this stuff. */
1104         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1105
1106         return 0;
1107 }
1108
1109 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1110 {
1111         struct cdrom_info *info = drive->driver_data;
1112         struct cdrom_device_info *cdi = &info->devinfo;
1113         struct packet_command cgc;
1114         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1115
1116         ide_debug_log(IDE_DBG_FUNC, "enter");
1117
1118         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1119                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1120
1121         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1122         do {
1123                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1124                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1125                 if (!stat)
1126                         break;
1127         } while (--attempts);
1128         return stat;
1129 }
1130
1131 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1132 {
1133         struct cdrom_info *cd = drive->driver_data;
1134         u16 curspeed, maxspeed;
1135
1136         ide_debug_log(IDE_DBG_FUNC, "enter");
1137
1138         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1139                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1140                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1141         } else {
1142                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1143                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1144         }
1145
1146         ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1147                                      curspeed, maxspeed);
1148
1149         cd->current_speed = (curspeed + (176/2)) / 176;
1150         cd->max_speed = (maxspeed + (176/2)) / 176;
1151 }
1152
1153 #define IDE_CD_CAPABILITIES \
1154         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1155          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1156          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1157          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1158          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1159
1160 static struct cdrom_device_ops ide_cdrom_dops = {
1161         .open                   = ide_cdrom_open_real,
1162         .release                = ide_cdrom_release_real,
1163         .drive_status           = ide_cdrom_drive_status,
1164         .media_changed          = ide_cdrom_check_media_change_real,
1165         .tray_move              = ide_cdrom_tray_move,
1166         .lock_door              = ide_cdrom_lock_door,
1167         .select_speed           = ide_cdrom_select_speed,
1168         .get_last_session       = ide_cdrom_get_last_session,
1169         .get_mcn                = ide_cdrom_get_mcn,
1170         .reset                  = ide_cdrom_reset,
1171         .audio_ioctl            = ide_cdrom_audio_ioctl,
1172         .capability             = IDE_CD_CAPABILITIES,
1173         .generic_packet         = ide_cdrom_packet,
1174 };
1175
1176 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1177 {
1178         struct cdrom_info *info = drive->driver_data;
1179         struct cdrom_device_info *devinfo = &info->devinfo;
1180
1181         ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1182
1183         devinfo->ops = &ide_cdrom_dops;
1184         devinfo->speed = info->current_speed;
1185         devinfo->capacity = nslots;
1186         devinfo->handle = drive;
1187         strcpy(devinfo->name, drive->name);
1188
1189         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1190                 devinfo->mask |= CDC_SELECT_SPEED;
1191
1192         devinfo->disk = info->disk;
1193         return register_cdrom(devinfo);
1194 }
1195
1196 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1197 {
1198         struct cdrom_info *cd = drive->driver_data;
1199         struct cdrom_device_info *cdi = &cd->devinfo;
1200         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1201         mechtype_t mechtype;
1202         int nslots = 1;
1203
1204         ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1205                                      drive->media, drive->atapi_flags);
1206
1207         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1208                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1209                      CDC_MO_DRIVE | CDC_RAM);
1210
1211         if (drive->media == ide_optical) {
1212                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1213                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1214                                 drive->name);
1215                 return nslots;
1216         }
1217
1218         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1219                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1220                 cdi->mask &= ~CDC_PLAY_AUDIO;
1221                 return nslots;
1222         }
1223
1224         /*
1225          * We have to cheat a little here. the packet will eventually be queued
1226          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1227          * Since this device hasn't been registered with the Uniform layer yet,
1228          * it can't do this. Same goes for cdi->ops.
1229          */
1230         cdi->handle = drive;
1231         cdi->ops = &ide_cdrom_dops;
1232
1233         if (ide_cdrom_get_capabilities(drive, buf))
1234                 return 0;
1235
1236         if ((buf[8 + 6] & 0x01) == 0)
1237                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1238         if (buf[8 + 6] & 0x08)
1239                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1240         if (buf[8 + 3] & 0x01)
1241                 cdi->mask &= ~CDC_CD_R;
1242         if (buf[8 + 3] & 0x02)
1243                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1244         if (buf[8 + 2] & 0x38)
1245                 cdi->mask &= ~CDC_DVD;
1246         if (buf[8 + 3] & 0x20)
1247                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1248         if (buf[8 + 3] & 0x10)
1249                 cdi->mask &= ~CDC_DVD_R;
1250         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1251                 cdi->mask &= ~CDC_PLAY_AUDIO;
1252
1253         mechtype = buf[8 + 6] >> 5;
1254         if (mechtype == mechtype_caddy ||
1255             mechtype == mechtype_popup ||
1256             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1257                 cdi->mask |= CDC_CLOSE_TRAY;
1258
1259         if (cdi->sanyo_slot > 0) {
1260                 cdi->mask &= ~CDC_SELECT_DISC;
1261                 nslots = 3;
1262         } else if (mechtype == mechtype_individual_changer ||
1263                    mechtype == mechtype_cartridge_changer) {
1264                 nslots = cdrom_number_of_slots(cdi);
1265                 if (nslots > 1)
1266                         cdi->mask &= ~CDC_SELECT_DISC;
1267         }
1268
1269         ide_cdrom_update_speed(drive, buf);
1270
1271         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1272
1273         /* don't print speed if the drive reported 0 */
1274         if (cd->max_speed)
1275                 printk(KERN_CONT " %dX", cd->max_speed);
1276
1277         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1278
1279         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1280                 printk(KERN_CONT " DVD%s%s",
1281                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1282                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1283
1284         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1285                 printk(KERN_CONT " CD%s%s",
1286                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1287                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1288
1289         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1290                 printk(KERN_CONT " changer w/%d slots", nslots);
1291         else
1292                 printk(KERN_CONT " drive");
1293
1294         printk(KERN_CONT ", %dkB Cache\n",
1295                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1296
1297         return nslots;
1298 }
1299
1300 /* standard prep_rq_fn that builds 10 byte cmds */
1301 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1302 {
1303         int hard_sect = queue_logical_block_size(q);
1304         long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
1305         unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
1306
1307         memset(rq->cmd, 0, BLK_MAX_CDB);
1308
1309         if (rq_data_dir(rq) == READ)
1310                 rq->cmd[0] = GPCMD_READ_10;
1311         else
1312                 rq->cmd[0] = GPCMD_WRITE_10;
1313
1314         /*
1315          * fill in lba
1316          */
1317         rq->cmd[2] = (block >> 24) & 0xff;
1318         rq->cmd[3] = (block >> 16) & 0xff;
1319         rq->cmd[4] = (block >>  8) & 0xff;
1320         rq->cmd[5] = block & 0xff;
1321
1322         /*
1323          * and transfer length
1324          */
1325         rq->cmd[7] = (blocks >> 8) & 0xff;
1326         rq->cmd[8] = blocks & 0xff;
1327         rq->cmd_len = 10;
1328         return BLKPREP_OK;
1329 }
1330
1331 /*
1332  * Most of the SCSI commands are supported directly by ATAPI devices.
1333  * This transform handles the few exceptions.
1334  */
1335 static int ide_cdrom_prep_pc(struct request *rq)
1336 {
1337         u8 *c = rq->cmd;
1338
1339         /* transform 6-byte read/write commands to the 10-byte version */
1340         if (c[0] == READ_6 || c[0] == WRITE_6) {
1341                 c[8] = c[4];
1342                 c[5] = c[3];
1343                 c[4] = c[2];
1344                 c[3] = c[1] & 0x1f;
1345                 c[2] = 0;
1346                 c[1] &= 0xe0;
1347                 c[0] += (READ_10 - READ_6);
1348                 rq->cmd_len = 10;
1349                 return BLKPREP_OK;
1350         }
1351
1352         /*
1353          * it's silly to pretend we understand 6-byte sense commands, just
1354          * reject with ILLEGAL_REQUEST and the caller should take the
1355          * appropriate action
1356          */
1357         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1358                 rq->errors = ILLEGAL_REQUEST;
1359                 return BLKPREP_KILL;
1360         }
1361
1362         return BLKPREP_OK;
1363 }
1364
1365 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1366 {
1367         if (blk_fs_request(rq))
1368                 return ide_cdrom_prep_fs(q, rq);
1369         else if (blk_pc_request(rq))
1370                 return ide_cdrom_prep_pc(rq);
1371
1372         return 0;
1373 }
1374
1375 struct cd_list_entry {
1376         const char      *id_model;
1377         const char      *id_firmware;
1378         unsigned int    cd_flags;
1379 };
1380
1381 #ifdef CONFIG_IDE_PROC_FS
1382 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1383 {
1384         unsigned long capacity, sectors_per_frame;
1385
1386         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1387                 return 0;
1388
1389         return capacity * sectors_per_frame;
1390 }
1391
1392 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1393                                         int count, int *eof, void *data)
1394 {
1395         ide_drive_t *drive = data;
1396         int len;
1397
1398         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1399         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1400 }
1401
1402 static ide_proc_entry_t idecd_proc[] = {
1403         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1404         { NULL, 0, NULL, NULL }
1405 };
1406
1407 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1408 {
1409         return idecd_proc;
1410 }
1411
1412 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1413 {
1414         return NULL;
1415 }
1416 #endif
1417
1418 static const struct cd_list_entry ide_cd_quirks_list[] = {
1419         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1420         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1421         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1422         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1423                                              IDE_AFLAG_PRE_ATAPI12,          },
1424         /* Vertos 300, some versions of this drive like to talk BCD. */
1425         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1426         /* Vertos 600 ESD. */
1427         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1428         /*
1429          * Sanyo 3 CD changer uses a non-standard command for CD changing
1430          * (by default standard ATAPI support for CD changers is used).
1431          */
1432         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1433         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1434         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1435         /* Stingray 8X CD-ROM. */
1436         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1437         /*
1438          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1439          * mode sense page capabilities size, but older drives break.
1440          */
1441         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1442         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1443         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1444         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1445         /*
1446          * Some drives used by Apple don't advertise audio play
1447          * but they do support reading TOC & audio datas.
1448          */
1449         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1450         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1451         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1452         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1453         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1454         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1455         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1456         { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1457         { NULL, NULL, 0 }
1458 };
1459
1460 static unsigned int ide_cd_flags(u16 *id)
1461 {
1462         const struct cd_list_entry *cle = ide_cd_quirks_list;
1463
1464         while (cle->id_model) {
1465                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1466                     (cle->id_firmware == NULL ||
1467                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1468                         return cle->cd_flags;
1469                 cle++;
1470         }
1471
1472         return 0;
1473 }
1474
1475 static int ide_cdrom_setup(ide_drive_t *drive)
1476 {
1477         struct cdrom_info *cd = drive->driver_data;
1478         struct cdrom_device_info *cdi = &cd->devinfo;
1479         struct request_queue *q = drive->queue;
1480         u16 *id = drive->id;
1481         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1482         int nslots;
1483
1484         ide_debug_log(IDE_DBG_PROBE, "enter");
1485
1486         blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1487         blk_queue_dma_alignment(q, 31);
1488         blk_queue_update_dma_pad(q, 15);
1489
1490         q->unplug_delay = max((1 * HZ) / 1000, 1);
1491
1492         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1493         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1494
1495         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1496             fw_rev[4] == '1' && fw_rev[6] <= '2')
1497                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1498                                      IDE_AFLAG_TOCADDR_AS_BCD);
1499         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1500                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1501                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1502         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1503                 /* 3 => use CD in slot 0 */
1504                 cdi->sanyo_slot = 3;
1505
1506         nslots = ide_cdrom_probe_capabilities(drive);
1507
1508         blk_queue_logical_block_size(q, CD_FRAMESIZE);
1509
1510         if (ide_cdrom_register(drive, nslots)) {
1511                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1512                                 " cdrom driver.\n", drive->name, __func__);
1513                 cd->devinfo.handle = NULL;
1514                 return 1;
1515         }
1516
1517         ide_proc_register_driver(drive, cd->driver);
1518         return 0;
1519 }
1520
1521 static void ide_cd_remove(ide_drive_t *drive)
1522 {
1523         struct cdrom_info *info = drive->driver_data;
1524
1525         ide_debug_log(IDE_DBG_FUNC, "enter");
1526
1527         ide_proc_unregister_driver(drive, info->driver);
1528         device_del(&info->dev);
1529         del_gendisk(info->disk);
1530
1531         mutex_lock(&idecd_ref_mutex);
1532         put_device(&info->dev);
1533         mutex_unlock(&idecd_ref_mutex);
1534 }
1535
1536 static void ide_cd_release(struct device *dev)
1537 {
1538         struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1539         struct cdrom_device_info *devinfo = &info->devinfo;
1540         ide_drive_t *drive = info->drive;
1541         struct gendisk *g = info->disk;
1542
1543         ide_debug_log(IDE_DBG_FUNC, "enter");
1544
1545         kfree(info->toc);
1546         if (devinfo->handle == drive)
1547                 unregister_cdrom(devinfo);
1548         drive->driver_data = NULL;
1549         blk_queue_prep_rq(drive->queue, NULL);
1550         g->private_data = NULL;
1551         put_disk(g);
1552         kfree(info);
1553 }
1554
1555 static int ide_cd_probe(ide_drive_t *);
1556
1557 static struct ide_driver ide_cdrom_driver = {
1558         .gen_driver = {
1559                 .owner          = THIS_MODULE,
1560                 .name           = "ide-cdrom",
1561                 .bus            = &ide_bus_type,
1562         },
1563         .probe                  = ide_cd_probe,
1564         .remove                 = ide_cd_remove,
1565         .version                = IDECD_VERSION,
1566         .do_request             = ide_cd_do_request,
1567 #ifdef CONFIG_IDE_PROC_FS
1568         .proc_entries           = ide_cd_proc_entries,
1569         .proc_devsets           = ide_cd_proc_devsets,
1570 #endif
1571 };
1572
1573 static int idecd_open(struct block_device *bdev, fmode_t mode)
1574 {
1575         struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1576         int rc = -ENOMEM;
1577
1578         if (!info)
1579                 return -ENXIO;
1580
1581         rc = cdrom_open(&info->devinfo, bdev, mode);
1582
1583         if (rc < 0)
1584                 ide_cd_put(info);
1585
1586         return rc;
1587 }
1588
1589 static int idecd_release(struct gendisk *disk, fmode_t mode)
1590 {
1591         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1592
1593         cdrom_release(&info->devinfo, mode);
1594
1595         ide_cd_put(info);
1596
1597         return 0;
1598 }
1599
1600 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1601 {
1602         struct packet_command cgc;
1603         char buffer[16];
1604         int stat;
1605         char spindown;
1606
1607         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1608                 return -EFAULT;
1609
1610         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1611
1612         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1613         if (stat)
1614                 return stat;
1615
1616         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1617         return cdrom_mode_select(cdi, &cgc);
1618 }
1619
1620 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1621 {
1622         struct packet_command cgc;
1623         char buffer[16];
1624         int stat;
1625         char spindown;
1626
1627         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1628
1629         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1630         if (stat)
1631                 return stat;
1632
1633         spindown = buffer[11] & 0x0f;
1634         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1635                 return -EFAULT;
1636         return 0;
1637 }
1638
1639 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1640                         unsigned int cmd, unsigned long arg)
1641 {
1642         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1643         int err;
1644
1645         switch (cmd) {
1646         case CDROMSETSPINDOWN:
1647                 return idecd_set_spindown(&info->devinfo, arg);
1648         case CDROMGETSPINDOWN:
1649                 return idecd_get_spindown(&info->devinfo, arg);
1650         default:
1651                 break;
1652         }
1653
1654         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1655         if (err == -EINVAL)
1656                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1657
1658         return err;
1659 }
1660
1661 static int idecd_media_changed(struct gendisk *disk)
1662 {
1663         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1664         return cdrom_media_changed(&info->devinfo);
1665 }
1666
1667 static int idecd_revalidate_disk(struct gendisk *disk)
1668 {
1669         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1670         struct request_sense sense;
1671
1672         ide_cd_read_toc(info->drive, &sense);
1673
1674         return  0;
1675 }
1676
1677 static struct block_device_operations idecd_ops = {
1678         .owner                  = THIS_MODULE,
1679         .open                   = idecd_open,
1680         .release                = idecd_release,
1681         .locked_ioctl           = idecd_ioctl,
1682         .media_changed          = idecd_media_changed,
1683         .revalidate_disk        = idecd_revalidate_disk
1684 };
1685
1686 /* module options */
1687 static unsigned long debug_mask;
1688 module_param(debug_mask, ulong, 0644);
1689
1690 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1691
1692 static int ide_cd_probe(ide_drive_t *drive)
1693 {
1694         struct cdrom_info *info;
1695         struct gendisk *g;
1696         struct request_sense sense;
1697
1698         ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1699                                      drive->driver_req, drive->media);
1700
1701         if (!strstr("ide-cdrom", drive->driver_req))
1702                 goto failed;
1703
1704         if (drive->media != ide_cdrom && drive->media != ide_optical)
1705                 goto failed;
1706
1707         drive->debug_mask = debug_mask;
1708         drive->irq_handler = cdrom_newpc_intr;
1709
1710         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1711         if (info == NULL) {
1712                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1713                                 drive->name);
1714                 goto failed;
1715         }
1716
1717         g = alloc_disk(1 << PARTN_BITS);
1718         if (!g)
1719                 goto out_free_cd;
1720
1721         ide_init_disk(g, drive);
1722
1723         info->dev.parent = &drive->gendev;
1724         info->dev.release = ide_cd_release;
1725         dev_set_name(&info->dev, dev_name(&drive->gendev));
1726
1727         if (device_register(&info->dev))
1728                 goto out_free_disk;
1729
1730         info->drive = drive;
1731         info->driver = &ide_cdrom_driver;
1732         info->disk = g;
1733
1734         g->private_data = &info->driver;
1735
1736         drive->driver_data = info;
1737
1738         g->minors = 1;
1739         g->driverfs_dev = &drive->gendev;
1740         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1741         if (ide_cdrom_setup(drive)) {
1742                 put_device(&info->dev);
1743                 goto failed;
1744         }
1745
1746         ide_cd_read_toc(drive, &sense);
1747         g->fops = &idecd_ops;
1748         g->flags |= GENHD_FL_REMOVABLE;
1749         add_disk(g);
1750         return 0;
1751
1752 out_free_disk:
1753         put_disk(g);
1754 out_free_cd:
1755         kfree(info);
1756 failed:
1757         return -ENODEV;
1758 }
1759
1760 static void __exit ide_cdrom_exit(void)
1761 {
1762         driver_unregister(&ide_cdrom_driver.gen_driver);
1763 }
1764
1765 static int __init ide_cdrom_init(void)
1766 {
1767         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1768         return driver_register(&ide_cdrom_driver.gen_driver);
1769 }
1770
1771 MODULE_ALIAS("ide:*m-cdrom*");
1772 MODULE_ALIAS("ide-cd");
1773 module_init(ide_cdrom_init);
1774 module_exit(ide_cdrom_exit);
1775 MODULE_LICENSE("GPL");