drivers/ide/ide-cd.c

   1 /*
   2  * ATAPI CD-ROM driver.
   3  *
   4  * Copyright (C) 1994-1996   Scott Snyder <snyder@fnald0.fnal.gov>
   5  * Copyright (C) 1996-1998   Erik Andersen <andersee@debian.org>
   6  * Copyright (C) 1998-2000   Jens Axboe <axboe@suse.de>
   7  * Copyright (C) 2005, 2007-2009  Bartlomiej Zolnierkiewicz
   8  *
   9  * May be copied or modified under the terms of the GNU General Public
  10  * License.  See linux/COPYING for more information.
  11  *
  12  * See Documentation/cdrom/ide-cd for usage information.
  13  *
  14  * Suggestions are welcome. Patches that work are more welcome though. ;-)
  15  *
  16  * Documentation:
  17  *      Mt. Fuji (SFF8090 version 4) and ATAPI (SFF-8020i rev 2.6) standards.
  18  *
  19  * For historical changelog please see:
  20  *      Documentation/ide/ChangeLog.ide-cd.1994-2004
  21  */
  22
  23 #define DRV_NAME "ide-cd"
  24 #define PFX DRV_NAME ": "
  25
  26 #define IDECD_VERSION "5.00"
  27
  28 #include <linux/module.h>
  29 #include <linux/types.h>
  30 #include <linux/kernel.h>
  31 #include <linux/delay.h>
  32 #include <linux/timer.h>
  33 #include <linux/slab.h>
  34 #include <linux/interrupt.h>
  35 #include <linux/errno.h>
  36 #include <linux/cdrom.h>
  37 #include <linux/ide.h>
  38 #include <linux/completion.h>
  39 #include <linux/mutex.h>
  40 #include <linux/bcd.h>
  41
  42 /* For SCSI -> ATAPI command conversion */
  43 #include <scsi/scsi.h>
  44
  45 #include <linux/irq.h>
  46 #include <linux/io.h>
  47 #include <asm/byteorder.h>
  48 #include <linux/uaccess.h>
  49 #include <asm/unaligned.h>
  50
  51 #include "ide-cd.h"
  52
  53 static DEFINE_MUTEX(idecd_ref_mutex);
  54
  55 static void ide_cd_release(struct device *);
  56
  57 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
  58 {
  59         struct cdrom_info *cd = NULL;
  60
  61         mutex_lock(&idecd_ref_mutex);
  62         cd = ide_drv_g(disk, cdrom_info);
  63         if (cd) {
  64                 if (ide_device_get(cd->drive))
  65                         cd = NULL;
  66                 else
  67                         get_device(&cd->dev);
  68
  69         }
  70         mutex_unlock(&idecd_ref_mutex);
  71         return cd;
  72 }
  73
  74 static void ide_cd_put(struct cdrom_info *cd)
  75 {
  76         ide_drive_t *drive = cd->drive;
  77
  78         mutex_lock(&idecd_ref_mutex);
  79         put_device(&cd->dev);
  80         ide_device_put(drive);
  81         mutex_unlock(&idecd_ref_mutex);
  82 }
  83
  84 /*
  85  * Generic packet command support and error handling routines.
  86  */
  87
  88 /* Mark that we've seen a media change and invalidate our internal buffers. */
  89 static void cdrom_saw_media_change(ide_drive_t *drive)
  90 {
  91         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
  92         drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
  93 }
  94
  95 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
  96                            struct request_sense *sense)
  97 {
  98         int log = 0;
  99
 100         ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
 101
 102         if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
 103                 return 0;
 104
 105         switch (sense->sense_key) {
 106         case NO_SENSE:
 107         case RECOVERED_ERROR:
 108                 break;
 109         case NOT_READY:
 110                 /*
 111                  * don't care about tray state messages for e.g. capacity
 112                  * commands or in-progress or becoming ready
 113                  */
 114                 if (sense->asc == 0x3a || sense->asc == 0x04)
 115                         break;
 116                 log = 1;
 117                 break;
 118         case ILLEGAL_REQUEST:
 119                 /*
 120                  * don't log START_STOP unit with LoEj set, since we cannot
 121                  * reliably check if drive can auto-close
 122                  */
 123                 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
 124                         break;
 125                 log = 1;
 126                 break;
 127         case UNIT_ATTENTION:
 128                 /*
 129                  * Make good and sure we've seen this potential media change.
 130                  * Some drives (i.e. Creative) fail to present the correct sense
 131                  * key in the error register.
 132                  */
 133                 cdrom_saw_media_change(drive);
 134                 break;
 135         default:
 136                 log = 1;
 137                 break;
 138         }
 139         return log;
 140 }
 141
 142 static void cdrom_analyze_sense_data(ide_drive_t *drive,
 143                               struct request *failed_command,
 144                               struct request_sense *sense)
 145 {
 146         unsigned long sector;
 147         unsigned long bio_sectors;
 148         struct cdrom_info *info = drive->driver_data;
 149
 150         ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
 151                                      sense->error_code, sense->sense_key);
 152
 153         if (failed_command)
 154                 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
 155                                              failed_command->cmd[0]);
 156
 157         if (!cdrom_log_sense(drive, failed_command, sense))
 158                 return;
 159
 160         /*
 161          * If a read toc is executed for a CD-R or CD-RW medium where the first
 162          * toc has not been recorded yet, it will fail with 05/24/00 (which is a
 163          * confusing error)
 164          */
 165         if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
 166                 if (sense->sense_key == 0x05 && sense->asc == 0x24)
 167                         return;
 168
 169         /* current error */
 170         if (sense->error_code == 0x70) {
 171                 switch (sense->sense_key) {
 172                 case MEDIUM_ERROR:
 173                 case VOLUME_OVERFLOW:
 174                 case ILLEGAL_REQUEST:
 175                         if (!sense->valid)
 176                                 break;
 177                         if (failed_command == NULL ||
 178                                         !blk_fs_request(failed_command))
 179                                 break;
 180                         sector = (sense->information[0] << 24) |
 181                                  (sense->information[1] << 16) |
 182                                  (sense->information[2] <<  8) |
 183                                  (sense->information[3]);
 184
 185                         if (drive->queue->hardsect_size == 2048)
 186                                 /* device sector size is 2K */
 187                                 sector <<= 2;
 188
 189                         bio_sectors = max(bio_sectors(failed_command->bio), 4U);
 190                         sector &= ~(bio_sectors - 1);
 191
 192                         /*
 193                          * The SCSI specification allows for the value
 194                          * returned by READ CAPACITY to be up to 75 2K
 195                          * sectors past the last readable block.
 196                          * Therefore, if we hit a medium error within the
 197                          * last 75 2K sectors, we decrease the saved size
 198                          * value.
 199                          */
 200                         if (sector < get_capacity(info->disk) &&
 201                             drive->probed_capacity - sector < 4 * 75)
 202                                 set_capacity(info->disk, sector);
 203                 }
 204         }
 205
 206         ide_cd_log_error(drive->name, failed_command, sense);
 207 }
 208
 209 static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
 210 {
 211         /*
 212          * For REQ_TYPE_SENSE, "rq->special" points to the original
 213          * failed request.  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                         sense = failed->sense;
 229                         failed->sense_len = rq->sense_len;
 230                 }
 231                 cdrom_analyze_sense_data(drive, failed, sense);
 232
 233                 if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
 234                         BUG();
 235         } else
 236                 cdrom_analyze_sense_data(drive, NULL, sense);
 237 }
 238
 239
 240 /*
 241  * Allow the drive 5 seconds to recover; some devices will return NOT_READY
 242  * while flushing data from cache.
 243  *
 244  * returns: 0 failed (write timeout expired)
 245  *          1 success
 246  */
 247 static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
 248 {
 249
 250         struct cdrom_info *info = drive->driver_data;
 251
 252         if (!rq->errors)
 253                 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
 254
 255         rq->errors = 1;
 256
 257         if (time_after(jiffies, info->write_timeout))
 258                 return 0;
 259         else {
 260                 struct request_queue *q = drive->queue;
 261                 unsigned long flags;
 262
 263                 /*
 264                  * take a breather relying on the unplug timer to kick us again
 265                  */
 266
 267                 spin_lock_irqsave(q->queue_lock, flags);
 268                 blk_plug_device(q);
 269                 spin_unlock_irqrestore(q->queue_lock, flags);
 270
 271                 return 1;
 272         }
 273 }
 274
 275 /**
 276  * Returns:
 277  * 0: if the request should be continued.
 278  * 1: if the request will be going through error recovery.
 279  * 2: if the request should be ended.
 280  */
 281 static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 282 {
 283         ide_hwif_t *hwif = drive->hwif;
 284         struct request *rq = hwif->rq;
 285         int err, sense_key, do_end_request = 0;
 286         u8 quiet = rq->cmd_flags & REQ_QUIET;
 287
 288         /* get the IDE error register */
 289         err = ide_read_error(drive);
 290         sense_key = err >> 4;
 291
 292         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
 293                                   "stat 0x%x",
 294                                   rq->cmd[0], rq->cmd_type, err, stat);
 295
 296         if (blk_sense_request(rq)) {
 297                 /*
 298                  * We got an error trying to get sense info from the drive
 299                  * (probably while trying to recover from a former error).
 300                  * Just give up.
 301                  */
 302                 rq->cmd_flags |= REQ_FAILED;
 303                 return 2;
 304         }
 305
 306         /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
 307         if (blk_pc_request(rq) && !rq->errors)
 308                 rq->errors = SAM_STAT_CHECK_CONDITION;
 309
 310         if (blk_noretry_request(rq))
 311                 do_end_request = 1;
 312
 313         switch (sense_key) {
 314         case NOT_READY:
 315                 if (blk_fs_request(rq) && rq_data_dir(rq) == WRITE) {
 316                         if (ide_cd_breathe(drive, rq))
 317                                 return 1;
 318                 } else {
 319                         cdrom_saw_media_change(drive);
 320
 321                         if (blk_fs_request(rq) && !quiet)
 322                                 printk(KERN_ERR PFX "%s: tray open\n",
 323                                         drive->name);
 324                 }
 325                 do_end_request = 1;
 326                 break;
 327         case UNIT_ATTENTION:
 328                 cdrom_saw_media_change(drive);
 329
 330                 if (blk_fs_request(rq) == 0)
 331                         return 0;
 332
 333                 /*
 334                  * Arrange to retry the request but be sure to give up if we've
 335                  * retried too many times.
 336                  */
 337                 if (++rq->errors > ERROR_MAX)
 338                         do_end_request = 1;
 339                 break;
 340         case ILLEGAL_REQUEST:
 341                 /*
 342                  * Don't print error message for this condition -- SFF8090i
 343                  * indicates that 5/24/00 is the correct response to a request
 344                  * to close the tray if the drive doesn't have that capability.
 345                  *
 346                  * cdrom_log_sense() knows this!
 347                  */
 348                 if (rq->cmd[0] == GPCMD_START_STOP_UNIT)
 349                         break;
 350                 /* fall-through */
 351         case DATA_PROTECT:
 352                 /*
 353                  * No point in retrying after an illegal request or data
 354                  * protect error.
 355                  */
 356                 if (!quiet)
 357                         ide_dump_status(drive, "command error", stat);
 358                 do_end_request = 1;
 359                 break;
 360         case MEDIUM_ERROR:
 361                 /*
 362                  * No point in re-trying a zillion times on a bad sector.
 363                  * If we got here the error is not correctable.
 364                  */
 365                 if (!quiet)
 366                         ide_dump_status(drive, "media error "
 367                                         "(bad sector)", stat);
 368                 do_end_request = 1;
 369                 break;
 370         case BLANK_CHECK:
 371                 /* disk appears blank? */
 372                 if (!quiet)
 373                         ide_dump_status(drive, "media error (blank)",
 374                                         stat);
 375                 do_end_request = 1;
 376                 break;
 377         default:
 378                 if (blk_fs_request(rq) == 0)
 379                         break;
 380                 if (err & ~ATA_ABORTED) {
 381                         /* go to the default handler for other errors */
 382                         ide_error(drive, "cdrom_decode_status", stat);
 383                         return 1;
 384                 } else if (++rq->errors > ERROR_MAX)
 385                         /* we've racked up too many retries, abort */
 386                         do_end_request = 1;
 387         }
 388
 389         if (blk_fs_request(rq) == 0) {
 390                 rq->cmd_flags |= REQ_FAILED;
 391                 do_end_request = 1;
 392         }
 393
 394         /*
 395          * End a request through request sense analysis when we have sense data.
 396          * We need this in order to perform end of media processing.
 397          */
 398         if (do_end_request)
 399                 goto end_request;
 400
 401         /* if we got a CHECK_CONDITION status, queue a request sense command */
 402         if (stat & ATA_ERR)
 403                 return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
 404         return 1;
 405
 406 end_request:
 407         if (stat & ATA_ERR) {
 408                 struct request_queue *q = drive->queue;
 409                 unsigned long flags;
 410
 411                 spin_lock_irqsave(q->queue_lock, flags);
 412                 blkdev_dequeue_request(rq);
 413                 spin_unlock_irqrestore(q->queue_lock, flags);
 414
 415                 hwif->rq = NULL;
 416
 417                 return ide_queue_sense_rq(drive, rq) ? 2 : 1;
 418         } else
 419                 return 2;
 420 }
 421
 422 /*
 423  * Check the contents of the interrupt reason register from the cdrom
 424  * and attempt to recover if there are problems.  Returns  0 if everything's
 425  * ok; nonzero if the request has been terminated.
 426  */
 427 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
 428                                 int len, int ireason, int rw)
 429 {
 430         ide_hwif_t *hwif = drive->hwif;
 431
 432         ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw);
 433
 434         /*
 435          * ireason == 0: the drive wants to receive data from us
 436          * ireason == 2: the drive is expecting to transfer data to us
 437          */
 438         if (ireason == (!rw << 1))
 439                 return 0;
 440         else if (ireason == (rw << 1)) {
 441
 442                 /* whoops... */
 443                 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
 444                                 drive->name, __func__);
 445
 446                 ide_pad_transfer(drive, rw, len);
 447         } else  if (rw == 0 && ireason == 1) {
 448                 /*
 449                  * Some drives (ASUS) seem to tell us that status info is
 450                  * available.  Just get it and ignore.
 451                  */
 452                 (void)hwif->tp_ops->read_status(hwif);
 453                 return 0;
 454         } else {
 455                 /* drive wants a command packet, or invalid ireason... */
 456                 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
 457                                 drive->name, __func__, ireason);
 458         }
 459
 460         if (rq->cmd_type == REQ_TYPE_ATA_PC)
 461                 rq->cmd_flags |= REQ_FAILED;
 462
 463         return -1;
 464 }
 465
 466 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
 467 {
 468         struct request *rq = cmd->rq;
 469
 470         ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
 471
 472         /*
 473          * Some of the trailing request sense fields are optional,
 474          * and some drives don't send them.  Sigh.
 475          */
 476         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 477             cmd->nleft > 0 && cmd->nleft <= 5)
 478                 cmd->nleft = 0;
 479 }
 480
 481 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 482                     int write, void *buffer, unsigned *bufflen,
 483                     struct request_sense *sense, int timeout,
 484                     unsigned int cmd_flags)
 485 {
 486         struct cdrom_info *info = drive->driver_data;
 487         struct request_sense local_sense;
 488         int retries = 10;
 489         unsigned int flags = 0;
 490
 491         if (!sense)
 492                 sense = &local_sense;
 493
 494         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
 495                                   "cmd_flags: 0x%x",
 496                                   cmd[0], write, timeout, cmd_flags);
 497
 498         /* start of retry loop */
 499         do {
 500                 struct request *rq;
 501                 int error;
 502
 503                 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
 504
 505                 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
 506                 rq->cmd_type = REQ_TYPE_ATA_PC;
 507                 rq->sense = sense;
 508                 rq->cmd_flags |= cmd_flags;
 509                 rq->timeout = timeout;
 510                 if (buffer) {
 511                         error = blk_rq_map_kern(drive->queue, rq, buffer,
 512                                                 *bufflen, GFP_NOIO);
 513                         if (error) {
 514                                 blk_put_request(rq);
 515                                 return error;
 516                         }
 517                 }
 518
 519                 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 520
 521                 if (buffer)
 522                         *bufflen = rq->resid_len;
 523
 524                 flags = rq->cmd_flags;
 525                 blk_put_request(rq);
 526
 527                 /*
 528                  * FIXME: we should probably abort/retry or something in case of
 529                  * failure.
 530                  */
 531                 if (flags & REQ_FAILED) {
 532                         /*
 533                          * The request failed.  Retry if it was due to a unit
 534                          * attention status (usually means media was changed).
 535                          */
 536                         struct request_sense *reqbuf = sense;
 537
 538                         if (reqbuf->sense_key == UNIT_ATTENTION)
 539                                 cdrom_saw_media_change(drive);
 540                         else if (reqbuf->sense_key == NOT_READY &&
 541                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 542                                 /*
 543                                  * The drive is in the process of loading
 544                                  * a disk.  Retry, but wait a little to give
 545                                  * the drive time to complete the load.
 546                                  */
 547                                 ssleep(2);
 548                         } else {
 549                                 /* otherwise, don't retry */
 550                                 retries = 0;
 551                         }
 552                         --retries;
 553                 }
 554
 555                 /* end of retry loop */
 556         } while ((flags & REQ_FAILED) && retries >= 0);
 557
 558         /* return an error if the command failed */
 559         return (flags & REQ_FAILED) ? -EIO : 0;
 560 }
 561
 562 static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 563 {
 564         unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
 565
 566         if (cmd->tf_flags & IDE_TFLAG_WRITE)
 567                 nr_bytes -= cmd->last_xfer_len;
 568
 569         if (nr_bytes > 0)
 570                 ide_complete_rq(drive, 0, nr_bytes);
 571 }
 572
 573 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 574 {
 575         ide_hwif_t *hwif = drive->hwif;
 576         struct ide_cmd *cmd = &hwif->cmd;
 577         struct request *rq = hwif->rq;
 578         ide_expiry_t *expiry = NULL;
 579         int dma_error = 0, dma, thislen, uptodate = 0;
 580         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
 581         int sense = blk_sense_request(rq);
 582         unsigned int timeout;
 583         u16 len;
 584         u8 ireason, stat;
 585
 586         ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
 587
 588         /* check for errors */
 589         dma = drive->dma;
 590         if (dma) {
 591                 drive->dma = 0;
 592                 drive->waiting_for_dma = 0;
 593                 dma_error = hwif->dma_ops->dma_end(drive);
 594                 ide_dma_unmap_sg(drive, cmd);
 595                 if (dma_error) {
 596                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 597                                         write ? "write" : "read");
 598                         ide_dma_off(drive);
 599                 }
 600         }
 601
 602         /* check status */
 603         stat = hwif->tp_ops->read_status(hwif);
 604
 605         if (!OK_STAT(stat, 0, BAD_R_STAT)) {
 606                 rc = cdrom_decode_status(drive, stat);
 607                 if (rc) {
 608                         if (rc == 2)
 609                                 goto out_end;
 610                         return ide_stopped;
 611                 }
 612         }
 613
 614         /* using dma, transfer is complete now */
 615         if (dma) {
 616                 if (dma_error)
 617                         return ide_error(drive, "dma error", stat);
 618                 uptodate = 1;
 619                 goto out_end;
 620         }
 621
 622         ide_read_bcount_and_ireason(drive, &len, &ireason);
 623
 624         thislen = blk_fs_request(rq) ? len : cmd->nleft;
 625         if (thislen > len)
 626                 thislen = len;
 627
 628         ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
 629                                   stat, thislen);
 630
 631         /* If DRQ is clear, the command has completed. */
 632         if ((stat & ATA_DRQ) == 0) {
 633                 if (blk_fs_request(rq)) {
 634                         /*
 635                          * If we're not done reading/writing, complain.
 636                          * Otherwise, complete the command normally.
 637                          */
 638                         uptodate = 1;
 639                         if (cmd->nleft > 0) {
 640                                 printk(KERN_ERR PFX "%s: %s: data underrun "
 641                                         "(%u bytes)\n", drive->name, __func__,
 642                                         cmd->nleft);
 643                                 if (!write)
 644                                         rq->cmd_flags |= REQ_FAILED;
 645                                 uptodate = 0;
 646                         }
 647                 } else if (!blk_pc_request(rq)) {
 648                         ide_cd_request_sense_fixup(drive, cmd);
 649                         /* complain if we still have data left to transfer */
 650                         uptodate = cmd->nleft ? 0 : 1;
 651                         if (uptodate == 0)
 652                                 rq->cmd_flags |= REQ_FAILED;
 653                 }
 654                 goto out_end;
 655         }
 656
 657         /* check which way to transfer data */
 658         rc = ide_cd_check_ireason(drive, rq, len, ireason, write);
 659         if (rc)
 660                 goto out_end;
 661
 662         cmd->last_xfer_len = 0;
 663
 664         ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
 665                                   "ireason: 0x%x",
 666                                   rq->cmd_type, ireason);
 667
 668         /* transfer data */
 669         while (thislen > 0) {
 670                 int blen = min_t(int, thislen, cmd->nleft);
 671
 672                 if (cmd->nleft == 0)
 673                         break;
 674
 675                 ide_pio_bytes(drive, cmd, write, blen);
 676                 cmd->last_xfer_len += blen;
 677
 678                 thislen -= blen;
 679                 len -= blen;
 680
 681                 if (sense && write == 0)
 682                         rq->sense_len += blen;
 683         }
 684
 685         /* pad, if necessary */
 686         if (len > 0) {
 687                 if (blk_fs_request(rq) == 0 || write == 0)
 688                         ide_pad_transfer(drive, write, len);
 689                 else {
 690                         printk(KERN_ERR PFX "%s: confused, missing data\n",
 691                                 drive->name);
 692                         blk_dump_rq_flags(rq, "cdrom_newpc_intr");
 693                 }
 694         }
 695
 696         if (blk_pc_request(rq)) {
 697                 timeout = rq->timeout;
 698         } else {
 699                 timeout = ATAPI_WAIT_PC;
 700                 if (!blk_fs_request(rq))
 701                         expiry = ide_cd_expiry;
 702         }
 703
 704         hwif->expiry = expiry;
 705         ide_set_handler(drive, cdrom_newpc_intr, timeout);
 706         return ide_started;
 707
 708 out_end:
 709         if (blk_pc_request(rq) && rc == 0) {
 710                 blk_end_request_all(rq, 0);
 711                 hwif->rq = NULL;
 712         } else {
 713                 if (sense && uptodate)
 714                         ide_cd_complete_failed_rq(drive, rq);
 715
 716                 if (blk_fs_request(rq)) {
 717                         if (cmd->nleft == 0)
 718                                 uptodate = 1;
 719                 } else {
 720                         if (uptodate <= 0 && rq->errors == 0)
 721                                 rq->errors = -EIO;
 722                 }
 723
 724                 if (uptodate == 0)
 725                         ide_cd_error_cmd(drive, cmd);
 726
 727                 /* make sure it's fully ended */
 728                 if (blk_fs_request(rq) == 0) {
 729                         rq->resid_len = blk_rq_bytes(rq) -
 730                                 (cmd->nbytes - cmd->nleft);
 731                         if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
 732                                 rq->resid_len += cmd->last_xfer_len;
 733                 }
 734
 735                 ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq));
 736
 737                 if (sense && rc == 2)
 738                         ide_error(drive, "request sense failure", stat);
 739         }
 740         return ide_stopped;
 741 }
 742
 743 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 744 {
 745         struct cdrom_info *cd = drive->driver_data;
 746         struct request_queue *q = drive->queue;
 747         int write = rq_data_dir(rq) == WRITE;
 748         unsigned short sectors_per_frame =
 749                 queue_hardsect_size(q) >> SECTOR_BITS;
 750
 751         ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
 752                                   "secs_per_frame: %u",
 753                                   rq->cmd[0], rq->cmd_flags, sectors_per_frame);
 754
 755         if (write) {
 756                 /* disk has become write protected */
 757                 if (get_disk_ro(cd->disk))
 758                         return ide_stopped;
 759         } else {
 760                 /*
 761                  * We may be retrying this request after an error.  Fix up any
 762                  * weirdness which might be present in the request packet.
 763                  */
 764                 q->prep_rq_fn(q, rq);
 765         }
 766
 767         /* fs requests *must* be hardware frame aligned */
 768         if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
 769             (blk_rq_pos(rq) & (sectors_per_frame - 1)))
 770                 return ide_stopped;
 771
 772         /* use DMA, if possible */
 773         drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 774
 775         if (write)
 776                 cd->devinfo.media_written = 1;
 777
 778         rq->timeout = ATAPI_WAIT_PC;
 779
 780         return ide_started;
 781 }
 782
 783 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
 784 {
 785
 786         ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
 787                                   rq->cmd[0], rq->cmd_type);
 788
 789         if (blk_pc_request(rq))
 790                 rq->cmd_flags |= REQ_QUIET;
 791         else
 792                 rq->cmd_flags &= ~REQ_FAILED;
 793
 794         drive->dma = 0;
 795
 796         /* sg request */
 797         if (rq->bio) {
 798                 struct request_queue *q = drive->queue;
 799                 char *buf = bio_data(rq->bio);
 800                 unsigned int alignment;
 801
 802                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 803
 804                 /*
 805                  * check if dma is safe
 806                  *
 807                  * NOTE! The "len" and "addr" checks should possibly have
 808                  * separate masks.
 809                  */
 810                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
 811                 if ((unsigned long)buf & alignment
 812                     || blk_rq_bytes(rq) & q->dma_pad_mask
 813                     || object_is_on_stack(buf))
 814                         drive->dma = 0;
 815         }
 816 }
 817
 818 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
 819                                         sector_t block)
 820 {
 821         struct ide_cmd cmd;
 822         int uptodate = 0, nsectors;
 823
 824         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
 825                                   rq->cmd[0], (unsigned long long)block);
 826
 827         if (drive->debug_mask & IDE_DBG_RQ)
 828                 blk_dump_rq_flags(rq, "ide_cd_do_request");
 829
 830         if (blk_fs_request(rq)) {
 831                 if (cdrom_start_rw(drive, rq) == ide_stopped)
 832                         goto out_end;
 833         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
 834                    rq->cmd_type == REQ_TYPE_ATA_PC) {
 835                 if (!rq->timeout)
 836                         rq->timeout = ATAPI_WAIT_PC;
 837
 838                 cdrom_do_block_pc(drive, rq);
 839         } else if (blk_special_request(rq)) {
 840                 /* right now this can only be a reset... */
 841                 uptodate = 1;
 842                 goto out_end;
 843         } else {
 844                 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
 845                 if (rq->errors == 0)
 846                         rq->errors = -EIO;
 847                 goto out_end;
 848         }
 849
 850         /* prepare sense request for this command */
 851         ide_prep_sense(drive, rq);
 852
 853         memset(&cmd, 0, sizeof(cmd));
 854
 855         if (rq_data_dir(rq))
 856                 cmd.tf_flags |= IDE_TFLAG_WRITE;
 857
 858         cmd.rq = rq;
 859
 860         if (blk_fs_request(rq) || blk_rq_bytes(rq)) {
 861                 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
 862                 ide_map_sg(drive, &cmd);
 863         }
 864
 865         return ide_issue_pc(drive, &cmd);
 866 out_end:
 867         nsectors = blk_rq_sectors(rq);
 868
 869         if (nsectors == 0)
 870                 nsectors = 1;
 871
 872         ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
 873
 874         return ide_stopped;
 875 }
 876
 877 /*
 878  * Ioctl handling.
 879  *
 880  * Routines which queue packet commands take as a final argument a pointer to a
 881  * request_sense struct. If execution of the command results in an error with a
 882  * CHECK CONDITION status, this structure will be filled with the results of the
 883  * subsequent request sense command. The pointer can also be NULL, in which case
 884  * no sense information is returned.
 885  */
 886 static void msf_from_bcd(struct atapi_msf *msf)
 887 {
 888         msf->minute = bcd2bin(msf->minute);
 889         msf->second = bcd2bin(msf->second);
 890         msf->frame  = bcd2bin(msf->frame);
 891 }
 892
 893 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
 894 {
 895         struct cdrom_info *info = drive->driver_data;
 896         struct cdrom_device_info *cdi = &info->devinfo;
 897         unsigned char cmd[BLK_MAX_CDB];
 898
 899         ide_debug_log(IDE_DBG_FUNC, "enter");
 900
 901         memset(cmd, 0, BLK_MAX_CDB);
 902         cmd[0] = GPCMD_TEST_UNIT_READY;
 903
 904         /*
 905          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
 906          * instead of supporting the LOAD_UNLOAD opcode.
 907          */
 908         cmd[7] = cdi->sanyo_slot % 3;
 909
 910         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
 911 }
 912
 913 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
 914                                unsigned long *sectors_per_frame,
 915                                struct request_sense *sense)
 916 {
 917         struct {
 918                 __be32 lba;
 919                 __be32 blocklen;
 920         } capbuf;
 921
 922         int stat;
 923         unsigned char cmd[BLK_MAX_CDB];
 924         unsigned len = sizeof(capbuf);
 925         u32 blocklen;
 926
 927         ide_debug_log(IDE_DBG_FUNC, "enter");
 928
 929         memset(cmd, 0, BLK_MAX_CDB);
 930         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
 931
 932         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
 933                                REQ_QUIET);
 934         if (stat)
 935                 return stat;
 936
 937         /*
 938          * Sanity check the given block size
 939          */
 940         blocklen = be32_to_cpu(capbuf.blocklen);
 941         switch (blocklen) {
 942         case 512:
 943         case 1024:
 944         case 2048:
 945         case 4096:
 946                 break;
 947         default:
 948                 printk(KERN_ERR PFX "%s: weird block size %u\n",
 949                                 drive->name, blocklen);
 950                 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
 951                                 drive->name);
 952                 blocklen = 2048;
 953                 break;
 954         }
 955
 956         *capacity = 1 + be32_to_cpu(capbuf.lba);
 957         *sectors_per_frame = blocklen >> SECTOR_BITS;
 958
 959         ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
 960                                      *capacity, *sectors_per_frame);
 961
 962         return 0;
 963 }
 964
 965 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
 966                                 int format, char *buf, int buflen,
 967                                 struct request_sense *sense)
 968 {
 969         unsigned char cmd[BLK_MAX_CDB];
 970
 971         ide_debug_log(IDE_DBG_FUNC, "enter");
 972
 973         memset(cmd, 0, BLK_MAX_CDB);
 974
 975         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
 976         cmd[6] = trackno;
 977         cmd[7] = (buflen >> 8);
 978         cmd[8] = (buflen & 0xff);
 979         cmd[9] = (format << 6);
 980
 981         if (msf_flag)
 982                 cmd[1] = 2;
 983
 984         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
 985 }
 986
 987 /* Try to read the entire TOC for the disk into our internal buffer. */
 988 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
 989 {
 990         int stat, ntracks, i;
 991         struct cdrom_info *info = drive->driver_data;
 992         struct cdrom_device_info *cdi = &info->devinfo;
 993         struct atapi_toc *toc = info->toc;
 994         struct {
 995                 struct atapi_toc_header hdr;
 996                 struct atapi_toc_entry  ent;
 997         } ms_tmp;
 998         long last_written;
 999         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1000
1001         ide_debug_log(IDE_DBG_FUNC, "enter");
1002
1003         if (toc == NULL) {
1004                 /* try to allocate space */
1005                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1006                 if (toc == NULL) {
1007                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1008                                         drive->name);
1009                         return -ENOMEM;
1010                 }
1011                 info->toc = toc;
1012         }
1013
1014         /*
1015          * Check to see if the existing data is still valid. If it is,
1016          * just return.
1017          */
1018         (void) cdrom_check_status(drive, sense);
1019
1020         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1021                 return 0;
1022
1023         /* try to get the total cdrom capacity and sector size */
1024         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1025                                    sense);
1026         if (stat)
1027                 toc->capacity = 0x1fffff;
1028
1029         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1030         /* save a private copy of the TOC capacity for error handling */
1031         drive->probed_capacity = toc->capacity * sectors_per_frame;
1032
1033         blk_queue_hardsect_size(drive->queue,
1034                                 sectors_per_frame << SECTOR_BITS);
1035
1036         /* first read just the header, so we know how long the TOC is */
1037         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1038                                     sizeof(struct atapi_toc_header), sense);
1039         if (stat)
1040                 return stat;
1041
1042         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1043                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1044                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1045         }
1046
1047         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1048         if (ntracks <= 0)
1049                 return -EIO;
1050         if (ntracks > MAX_TRACKS)
1051                 ntracks = MAX_TRACKS;
1052
1053         /* now read the whole schmeer */
1054         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1055                                   (char *)&toc->hdr,
1056                                    sizeof(struct atapi_toc_header) +
1057                                    (ntracks + 1) *
1058                                    sizeof(struct atapi_toc_entry), sense);
1059
1060         if (stat && toc->hdr.first_track > 1) {
1061                 /*
1062                  * Cds with CDI tracks only don't have any TOC entries, despite
1063                  * of this the returned values are
1064                  * first_track == last_track = number of CDI tracks + 1,
1065                  * so that this case is indistinguishable from the same layout
1066                  * plus an additional audio track. If we get an error for the
1067                  * regular case, we assume a CDI without additional audio
1068                  * tracks. In this case the readable TOC is empty (CDI tracks
1069                  * are not included) and only holds the Leadout entry.
1070                  *
1071                  * Heiko Eißfeldt.
1072                  */
1073                 ntracks = 0;
1074                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1075                                            (char *)&toc->hdr,
1076                                            sizeof(struct atapi_toc_header) +
1077                                            (ntracks + 1) *
1078                                            sizeof(struct atapi_toc_entry),
1079                                            sense);
1080                 if (stat)
1081                         return stat;
1082
1083                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1084                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1085                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1086                 } else {
1087                         toc->hdr.first_track = CDROM_LEADOUT;
1088                         toc->hdr.last_track = CDROM_LEADOUT;
1089                 }
1090         }
1091
1092         if (stat)
1093                 return stat;
1094
1095         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1096
1097         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1098                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1099                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1100         }
1101
1102         for (i = 0; i <= ntracks; i++) {
1103                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1104                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1105                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1106                         msf_from_bcd(&toc->ent[i].addr.msf);
1107                 }
1108                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1109                                                   toc->ent[i].addr.msf.second,
1110                                                   toc->ent[i].addr.msf.frame);
1111         }
1112
1113         if (toc->hdr.first_track != CDROM_LEADOUT) {
1114                 /* read the multisession information */
1115                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1116                                            sizeof(ms_tmp), sense);
1117                 if (stat)
1118                         return stat;
1119
1120                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1121         } else {
1122                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1123                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1124                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1125         }
1126
1127         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1128                 /* re-read multisession information using MSF format */
1129                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1130                                            sizeof(ms_tmp), sense);
1131                 if (stat)
1132                         return stat;
1133
1134                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1135                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1136                                                    ms_tmp.ent.addr.msf.second,
1137                                                    ms_tmp.ent.addr.msf.frame);
1138         }
1139
1140         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1141
1142         /* now try to get the total cdrom capacity */
1143         stat = cdrom_get_last_written(cdi, &last_written);
1144         if (!stat && (last_written > toc->capacity)) {
1145                 toc->capacity = last_written;
1146                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1147                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1148         }
1149
1150         /* Remember that we've read this stuff. */
1151         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1152
1153         return 0;
1154 }
1155
1156 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1157 {
1158         struct cdrom_info *info = drive->driver_data;
1159         struct cdrom_device_info *cdi = &info->devinfo;
1160         struct packet_command cgc;
1161         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1162
1163         ide_debug_log(IDE_DBG_FUNC, "enter");
1164
1165         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1166                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1167
1168         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1169         do {
1170                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1171                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1172                 if (!stat)
1173                         break;
1174         } while (--attempts);
1175         return stat;
1176 }
1177
1178 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1179 {
1180         struct cdrom_info *cd = drive->driver_data;
1181         u16 curspeed, maxspeed;
1182
1183         ide_debug_log(IDE_DBG_FUNC, "enter");
1184
1185         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1186                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1187                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1188         } else {
1189                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1190                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1191         }
1192
1193         ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1194                                      curspeed, maxspeed);
1195
1196         cd->current_speed = (curspeed + (176/2)) / 176;
1197         cd->max_speed = (maxspeed + (176/2)) / 176;
1198 }
1199
1200 #define IDE_CD_CAPABILITIES \
1201         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1202          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1203          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1204          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1205          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1206
1207 static struct cdrom_device_ops ide_cdrom_dops = {
1208         .open                   = ide_cdrom_open_real,
1209         .release                = ide_cdrom_release_real,
1210         .drive_status           = ide_cdrom_drive_status,
1211         .media_changed          = ide_cdrom_check_media_change_real,
1212         .tray_move              = ide_cdrom_tray_move,
1213         .lock_door              = ide_cdrom_lock_door,
1214         .select_speed           = ide_cdrom_select_speed,
1215         .get_last_session       = ide_cdrom_get_last_session,
1216         .get_mcn                = ide_cdrom_get_mcn,
1217         .reset                  = ide_cdrom_reset,
1218         .audio_ioctl            = ide_cdrom_audio_ioctl,
1219         .capability             = IDE_CD_CAPABILITIES,
1220         .generic_packet         = ide_cdrom_packet,
1221 };
1222
1223 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1224 {
1225         struct cdrom_info *info = drive->driver_data;
1226         struct cdrom_device_info *devinfo = &info->devinfo;
1227
1228         ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1229
1230         devinfo->ops = &ide_cdrom_dops;
1231         devinfo->speed = info->current_speed;
1232         devinfo->capacity = nslots;
1233         devinfo->handle = drive;
1234         strcpy(devinfo->name, drive->name);
1235
1236         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1237                 devinfo->mask |= CDC_SELECT_SPEED;
1238
1239         devinfo->disk = info->disk;
1240         return register_cdrom(devinfo);
1241 }
1242
1243 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1244 {
1245         struct cdrom_info *cd = drive->driver_data;
1246         struct cdrom_device_info *cdi = &cd->devinfo;
1247         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1248         mechtype_t mechtype;
1249         int nslots = 1;
1250
1251         ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1252                                      drive->media, drive->atapi_flags);
1253
1254         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1255                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1256                      CDC_MO_DRIVE | CDC_RAM);
1257
1258         if (drive->media == ide_optical) {
1259                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1260                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1261                                 drive->name);
1262                 return nslots;
1263         }
1264
1265         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1266                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1267                 cdi->mask &= ~CDC_PLAY_AUDIO;
1268                 return nslots;
1269         }
1270
1271         /*
1272          * We have to cheat a little here. the packet will eventually be queued
1273          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1274          * Since this device hasn't been registered with the Uniform layer yet,
1275          * it can't do this. Same goes for cdi->ops.
1276          */
1277         cdi->handle = drive;
1278         cdi->ops = &ide_cdrom_dops;
1279
1280         if (ide_cdrom_get_capabilities(drive, buf))
1281                 return 0;
1282
1283         if ((buf[8 + 6] & 0x01) == 0)
1284                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1285         if (buf[8 + 6] & 0x08)
1286                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1287         if (buf[8 + 3] & 0x01)
1288                 cdi->mask &= ~CDC_CD_R;
1289         if (buf[8 + 3] & 0x02)
1290                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1291         if (buf[8 + 2] & 0x38)
1292                 cdi->mask &= ~CDC_DVD;
1293         if (buf[8 + 3] & 0x20)
1294                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1295         if (buf[8 + 3] & 0x10)
1296                 cdi->mask &= ~CDC_DVD_R;
1297         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1298                 cdi->mask &= ~CDC_PLAY_AUDIO;
1299
1300         mechtype = buf[8 + 6] >> 5;
1301         if (mechtype == mechtype_caddy ||
1302             mechtype == mechtype_popup ||
1303             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1304                 cdi->mask |= CDC_CLOSE_TRAY;
1305
1306         if (cdi->sanyo_slot > 0) {
1307                 cdi->mask &= ~CDC_SELECT_DISC;
1308                 nslots = 3;
1309         } else if (mechtype == mechtype_individual_changer ||
1310                    mechtype == mechtype_cartridge_changer) {
1311                 nslots = cdrom_number_of_slots(cdi);
1312                 if (nslots > 1)
1313                         cdi->mask &= ~CDC_SELECT_DISC;
1314         }
1315
1316         ide_cdrom_update_speed(drive, buf);
1317
1318         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1319
1320         /* don't print speed if the drive reported 0 */
1321         if (cd->max_speed)
1322                 printk(KERN_CONT " %dX", cd->max_speed);
1323
1324         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1325
1326         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1327                 printk(KERN_CONT " DVD%s%s",
1328                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1329                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1330
1331         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1332                 printk(KERN_CONT " CD%s%s",
1333                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1334                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1335
1336         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1337                 printk(KERN_CONT " changer w/%d slots", nslots);
1338         else
1339                 printk(KERN_CONT " drive");
1340
1341         printk(KERN_CONT ", %dkB Cache\n",
1342                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1343
1344         return nslots;
1345 }
1346
1347 /* standard prep_rq_fn that builds 10 byte cmds */
1348 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1349 {
1350         int hard_sect = queue_hardsect_size(q);
1351         long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
1352         unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
1353
1354         memset(rq->cmd, 0, BLK_MAX_CDB);
1355
1356         if (rq_data_dir(rq) == READ)
1357                 rq->cmd[0] = GPCMD_READ_10;
1358         else
1359                 rq->cmd[0] = GPCMD_WRITE_10;
1360
1361         /*
1362          * fill in lba
1363          */
1364         rq->cmd[2] = (block >> 24) & 0xff;
1365         rq->cmd[3] = (block >> 16) & 0xff;
1366         rq->cmd[4] = (block >>  8) & 0xff;
1367         rq->cmd[5] = block & 0xff;
1368
1369         /*
1370          * and transfer length
1371          */
1372         rq->cmd[7] = (blocks >> 8) & 0xff;
1373         rq->cmd[8] = blocks & 0xff;
1374         rq->cmd_len = 10;
1375         return BLKPREP_OK;
1376 }
1377
1378 /*
1379  * Most of the SCSI commands are supported directly by ATAPI devices.
1380  * This transform handles the few exceptions.
1381  */
1382 static int ide_cdrom_prep_pc(struct request *rq)
1383 {
1384         u8 *c = rq->cmd;
1385
1386         /* transform 6-byte read/write commands to the 10-byte version */
1387         if (c[0] == READ_6 || c[0] == WRITE_6) {
1388                 c[8] = c[4];
1389                 c[5] = c[3];
1390                 c[4] = c[2];
1391                 c[3] = c[1] & 0x1f;
1392                 c[2] = 0;
1393                 c[1] &= 0xe0;
1394                 c[0] += (READ_10 - READ_6);
1395                 rq->cmd_len = 10;
1396                 return BLKPREP_OK;
1397         }
1398
1399         /*
1400          * it's silly to pretend we understand 6-byte sense commands, just
1401          * reject with ILLEGAL_REQUEST and the caller should take the
1402          * appropriate action
1403          */
1404         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1405                 rq->errors = ILLEGAL_REQUEST;
1406                 return BLKPREP_KILL;
1407         }
1408
1409         return BLKPREP_OK;
1410 }
1411
1412 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1413 {
1414         if (blk_fs_request(rq))
1415                 return ide_cdrom_prep_fs(q, rq);
1416         else if (blk_pc_request(rq))
1417                 return ide_cdrom_prep_pc(rq);
1418
1419         return 0;
1420 }
1421
1422 struct cd_list_entry {
1423         const char      *id_model;
1424         const char      *id_firmware;
1425         unsigned int    cd_flags;
1426 };
1427
1428 #ifdef CONFIG_IDE_PROC_FS
1429 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1430 {
1431         unsigned long capacity, sectors_per_frame;
1432
1433         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1434                 return 0;
1435
1436         return capacity * sectors_per_frame;
1437 }
1438
1439 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1440                                         int count, int *eof, void *data)
1441 {
1442         ide_drive_t *drive = data;
1443         int len;
1444
1445         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1446         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1447 }
1448
1449 static ide_proc_entry_t idecd_proc[] = {
1450         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1451         { NULL, 0, NULL, NULL }
1452 };
1453
1454 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1455 {
1456         return idecd_proc;
1457 }
1458
1459 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1460 {
1461         return NULL;
1462 }
1463 #endif
1464
1465 static const struct cd_list_entry ide_cd_quirks_list[] = {
1466         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1467         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1468         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1469         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1470                                              IDE_AFLAG_PRE_ATAPI12,          },
1471         /* Vertos 300, some versions of this drive like to talk BCD. */
1472         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1473         /* Vertos 600 ESD. */
1474         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1475         /*
1476          * Sanyo 3 CD changer uses a non-standard command for CD changing
1477          * (by default standard ATAPI support for CD changers is used).
1478          */
1479         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1480         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1481         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1482         /* Stingray 8X CD-ROM. */
1483         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1484         /*
1485          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1486          * mode sense page capabilities size, but older drives break.
1487          */
1488         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1489         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1490         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1491         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1492         /*
1493          * Some drives used by Apple don't advertise audio play
1494          * but they do support reading TOC & audio datas.
1495          */
1496         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1497         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1498         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1499         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1500         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1501         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1502         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1503         { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1504         { NULL, NULL, 0 }
1505 };
1506
1507 static unsigned int ide_cd_flags(u16 *id)
1508 {
1509         const struct cd_list_entry *cle = ide_cd_quirks_list;
1510
1511         while (cle->id_model) {
1512                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1513                     (cle->id_firmware == NULL ||
1514                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1515                         return cle->cd_flags;
1516                 cle++;
1517         }
1518
1519         return 0;
1520 }
1521
1522 static int ide_cdrom_setup(ide_drive_t *drive)
1523 {
1524         struct cdrom_info *cd = drive->driver_data;
1525         struct cdrom_device_info *cdi = &cd->devinfo;
1526         struct request_queue *q = drive->queue;
1527         u16 *id = drive->id;
1528         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1529         int nslots;
1530
1531         ide_debug_log(IDE_DBG_PROBE, "enter");
1532
1533         blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1534         blk_queue_dma_alignment(q, 31);
1535         blk_queue_update_dma_pad(q, 15);
1536
1537         q->unplug_delay = max((1 * HZ) / 1000, 1);
1538
1539         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1540         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1541
1542         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1543             fw_rev[4] == '1' && fw_rev[6] <= '2')
1544                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1545                                      IDE_AFLAG_TOCADDR_AS_BCD);
1546         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1547                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1548                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1549         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1550                 /* 3 => use CD in slot 0 */
1551                 cdi->sanyo_slot = 3;
1552
1553         nslots = ide_cdrom_probe_capabilities(drive);
1554
1555         blk_queue_hardsect_size(q, CD_FRAMESIZE);
1556
1557         if (ide_cdrom_register(drive, nslots)) {
1558                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1559                                 " cdrom driver.\n", drive->name, __func__);
1560                 cd->devinfo.handle = NULL;
1561                 return 1;
1562         }
1563
1564         ide_proc_register_driver(drive, cd->driver);
1565         return 0;
1566 }
1567
1568 static void ide_cd_remove(ide_drive_t *drive)
1569 {
1570         struct cdrom_info *info = drive->driver_data;
1571
1572         ide_debug_log(IDE_DBG_FUNC, "enter");
1573
1574         ide_proc_unregister_driver(drive, info->driver);
1575         device_del(&info->dev);
1576         del_gendisk(info->disk);
1577
1578         mutex_lock(&idecd_ref_mutex);
1579         put_device(&info->dev);
1580         mutex_unlock(&idecd_ref_mutex);
1581 }
1582
1583 static void ide_cd_release(struct device *dev)
1584 {
1585         struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1586         struct cdrom_device_info *devinfo = &info->devinfo;
1587         ide_drive_t *drive = info->drive;
1588         struct gendisk *g = info->disk;
1589
1590         ide_debug_log(IDE_DBG_FUNC, "enter");
1591
1592         kfree(info->toc);
1593         if (devinfo->handle == drive)
1594                 unregister_cdrom(devinfo);
1595         drive->driver_data = NULL;
1596         blk_queue_prep_rq(drive->queue, NULL);
1597         g->private_data = NULL;
1598         put_disk(g);
1599         kfree(info);
1600 }
1601
1602 static int ide_cd_probe(ide_drive_t *);
1603
1604 static struct ide_driver ide_cdrom_driver = {
1605         .gen_driver = {
1606                 .owner          = THIS_MODULE,
1607                 .name           = "ide-cdrom",
1608                 .bus            = &ide_bus_type,
1609         },
1610         .probe                  = ide_cd_probe,
1611         .remove                 = ide_cd_remove,
1612         .version                = IDECD_VERSION,
1613         .do_request             = ide_cd_do_request,
1614 #ifdef CONFIG_IDE_PROC_FS
1615         .proc_entries           = ide_cd_proc_entries,
1616         .proc_devsets           = ide_cd_proc_devsets,
1617 #endif
1618 };
1619
1620 static int idecd_open(struct block_device *bdev, fmode_t mode)
1621 {
1622         struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1623         int rc = -ENOMEM;
1624
1625         if (!info)
1626                 return -ENXIO;
1627
1628         rc = cdrom_open(&info->devinfo, bdev, mode);
1629
1630         if (rc < 0)
1631                 ide_cd_put(info);
1632
1633         return rc;
1634 }
1635
1636 static int idecd_release(struct gendisk *disk, fmode_t mode)
1637 {
1638         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1639
1640         cdrom_release(&info->devinfo, mode);
1641
1642         ide_cd_put(info);
1643
1644         return 0;
1645 }
1646
1647 static int idecd_set_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         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1655                 return -EFAULT;
1656
1657         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1658
1659         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1660         if (stat)
1661                 return stat;
1662
1663         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1664         return cdrom_mode_select(cdi, &cgc);
1665 }
1666
1667 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1668 {
1669         struct packet_command cgc;
1670         char buffer[16];
1671         int stat;
1672         char spindown;
1673
1674         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1675
1676         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1677         if (stat)
1678                 return stat;
1679
1680         spindown = buffer[11] & 0x0f;
1681         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1682                 return -EFAULT;
1683         return 0;
1684 }
1685
1686 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1687                         unsigned int cmd, unsigned long arg)
1688 {
1689         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1690         int err;
1691
1692         switch (cmd) {
1693         case CDROMSETSPINDOWN:
1694                 return idecd_set_spindown(&info->devinfo, arg);
1695         case CDROMGETSPINDOWN:
1696                 return idecd_get_spindown(&info->devinfo, arg);
1697         default:
1698                 break;
1699         }
1700
1701         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1702         if (err == -EINVAL)
1703                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1704
1705         return err;
1706 }
1707
1708 static int idecd_media_changed(struct gendisk *disk)
1709 {
1710         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1711         return cdrom_media_changed(&info->devinfo);
1712 }
1713
1714 static int idecd_revalidate_disk(struct gendisk *disk)
1715 {
1716         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1717         struct request_sense sense;
1718
1719         ide_cd_read_toc(info->drive, &sense);
1720
1721         return  0;
1722 }
1723
1724 static struct block_device_operations idecd_ops = {
1725         .owner                  = THIS_MODULE,
1726         .open                   = idecd_open,
1727         .release                = idecd_release,
1728         .locked_ioctl           = idecd_ioctl,
1729         .media_changed          = idecd_media_changed,
1730         .revalidate_disk        = idecd_revalidate_disk
1731 };
1732
1733 /* module options */
1734 static unsigned long debug_mask;
1735 module_param(debug_mask, ulong, 0644);
1736
1737 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1738
1739 static int ide_cd_probe(ide_drive_t *drive)
1740 {
1741         struct cdrom_info *info;
1742         struct gendisk *g;
1743         struct request_sense sense;
1744
1745         ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1746                                      drive->driver_req, drive->media);
1747
1748         if (!strstr("ide-cdrom", drive->driver_req))
1749                 goto failed;
1750
1751         if (drive->media != ide_cdrom && drive->media != ide_optical)
1752                 goto failed;
1753
1754         drive->debug_mask = debug_mask;
1755         drive->irq_handler = cdrom_newpc_intr;
1756
1757         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1758         if (info == NULL) {
1759                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1760                                 drive->name);
1761                 goto failed;
1762         }
1763
1764         g = alloc_disk(1 << PARTN_BITS);
1765         if (!g)
1766                 goto out_free_cd;
1767
1768         ide_init_disk(g, drive);
1769
1770         info->dev.parent = &drive->gendev;
1771         info->dev.release = ide_cd_release;
1772         dev_set_name(&info->dev, dev_name(&drive->gendev));
1773
1774         if (device_register(&info->dev))
1775                 goto out_free_disk;
1776
1777         info->drive = drive;
1778         info->driver = &ide_cdrom_driver;
1779         info->disk = g;
1780
1781         g->private_data = &info->driver;
1782
1783         drive->driver_data = info;
1784
1785         g->minors = 1;
1786         g->driverfs_dev = &drive->gendev;
1787         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1788         if (ide_cdrom_setup(drive)) {
1789                 put_device(&info->dev);
1790                 goto failed;
1791         }
1792
1793         ide_cd_read_toc(drive, &sense);
1794         g->fops = &idecd_ops;
1795         g->flags |= GENHD_FL_REMOVABLE;
1796         add_disk(g);
1797         return 0;
1798
1799 out_free_disk:
1800         put_disk(g);
1801 out_free_cd:
1802         kfree(info);
1803 failed:
1804         return -ENODEV;
1805 }
1806
1807 static void __exit ide_cdrom_exit(void)
1808 {
1809         driver_unregister(&ide_cdrom_driver.gen_driver);
1810 }
1811
1812 static int __init ide_cdrom_init(void)
1813 {
1814         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1815         return driver_register(&ide_cdrom_driver.gen_driver);
1816 }
1817
1818 MODULE_ALIAS("ide:*m-cdrom*");
1819 MODULE_ALIAS("ide-cd");
1820 module_init(ide_cdrom_init);
1821 module_exit(ide_cdrom_exit);
1822 MODULE_LICENSE("GPL");