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