git.oblomov.eu Git - linux-2.6/blob - 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  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  * For those wishing to work on this driver, please be sure you download
  16  * and comply with the latest Mt. Fuji (SFF8090 version 4) and ATAPI
  17  * (SFF-8020i rev 2.6) standards. These documents can be obtained by
  18  * anonymous ftp from:
  19  * ftp://fission.dt.wdc.com/pub/standards/SFF_atapi/spec/SFF8020-r2.6/PS/8020r26.ps
  20  * ftp://ftp.avc-pioneer.com/Mtfuji4/Spec/Fuji4r10.pdf
  21  *
  22  * For historical changelog please see:
  23  *      Documentation/ide/ChangeLog.ide-cd.1994-2004
  24  */
  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 #define to_ide_cd(obj) container_of(obj, struct cdrom_info, kref)
  56
  57 #define ide_cd_g(disk) \
  58         container_of((disk)->private_data, struct cdrom_info, driver)
  59
  60 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
  61 {
  62         struct cdrom_info *cd = NULL;
  63
  64         mutex_lock(&idecd_ref_mutex);
  65         cd = ide_cd_g(disk);
  66         if (cd)
  67                 kref_get(&cd->kref);
  68         mutex_unlock(&idecd_ref_mutex);
  69         return cd;
  70 }
  71
  72 static void ide_cd_release(struct kref *);
  73
  74 static void ide_cd_put(struct cdrom_info *cd)
  75 {
  76         mutex_lock(&idecd_ref_mutex);
  77         kref_put(&cd->kref, ide_cd_release);
  78         mutex_unlock(&idecd_ref_mutex);
  79 }
  80
  81 /*
  82  * Generic packet command support and error handling routines.
  83  */
  84
  85 /* Mark that we've seen a media change and invalidate our internal buffers. */
  86 static void cdrom_saw_media_change(ide_drive_t *drive)
  87 {
  88         struct cdrom_info *cd = drive->driver_data;
  89
  90         cd->cd_flags |= IDE_CD_FLAG_MEDIA_CHANGED;
  91         cd->cd_flags &= ~IDE_CD_FLAG_TOC_VALID;
  92 }
  93
  94 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
  95                            struct request_sense *sense)
  96 {
  97         int log = 0;
  98
  99         if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
 100                 return 0;
 101
 102         switch (sense->sense_key) {
 103         case NO_SENSE:
 104         case RECOVERED_ERROR:
 105                 break;
 106         case NOT_READY:
 107                 /*
 108                  * don't care about tray state messages for e.g. capacity
 109                  * commands or in-progress or becoming ready
 110                  */
 111                 if (sense->asc == 0x3a || sense->asc == 0x04)
 112                         break;
 113                 log = 1;
 114                 break;
 115         case ILLEGAL_REQUEST:
 116                 /*
 117                  * don't log START_STOP unit with LoEj set, since we cannot
 118                  * reliably check if drive can auto-close
 119                  */
 120                 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
 121                         break;
 122                 log = 1;
 123                 break;
 124         case UNIT_ATTENTION:
 125                 /*
 126                  * Make good and sure we've seen this potential media change.
 127                  * Some drives (i.e. Creative) fail to present the correct sense
 128                  * key in the error register.
 129                  */
 130                 cdrom_saw_media_change(drive);
 131                 break;
 132         default:
 133                 log = 1;
 134                 break;
 135         }
 136         return log;
 137 }
 138
 139 static void cdrom_analyze_sense_data(ide_drive_t *drive,
 140                               struct request *failed_command,
 141                               struct request_sense *sense)
 142 {
 143         unsigned long sector;
 144         unsigned long bio_sectors;
 145         struct cdrom_info *info = drive->driver_data;
 146
 147         if (!cdrom_log_sense(drive, failed_command, sense))
 148                 return;
 149
 150         /*
 151          * If a read toc is executed for a CD-R or CD-RW medium where the first
 152          * toc has not been recorded yet, it will fail with 05/24/00 (which is a
 153          * confusing error)
 154          */
 155         if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
 156                 if (sense->sense_key == 0x05 && sense->asc == 0x24)
 157                         return;
 158
 159         /* current error */
 160         if (sense->error_code == 0x70) {
 161                 switch (sense->sense_key) {
 162                 case MEDIUM_ERROR:
 163                 case VOLUME_OVERFLOW:
 164                 case ILLEGAL_REQUEST:
 165                         if (!sense->valid)
 166                                 break;
 167                         if (failed_command == NULL ||
 168                                         !blk_fs_request(failed_command))
 169                                 break;
 170                         sector = (sense->information[0] << 24) |
 171                                  (sense->information[1] << 16) |
 172                                  (sense->information[2] <<  8) |
 173                                  (sense->information[3]);
 174
 175                         if (drive->queue->hardsect_size == 2048)
 176                                 /* device sector size is 2K */
 177                                 sector <<= 2;
 178
 179                         bio_sectors = max(bio_sectors(failed_command->bio), 4U);
 180                         sector &= ~(bio_sectors - 1);
 181
 182                         if (sector < get_capacity(info->disk) &&
 183                             drive->probed_capacity - sector < 4 * 75)
 184                                 set_capacity(info->disk, sector);
 185                 }
 186         }
 187
 188         ide_cd_log_error(drive->name, failed_command, sense);
 189 }
 190
 191 /* Initialize a ide-cd packet command request */
 192 void ide_cd_init_rq(ide_drive_t *drive, struct request *rq)
 193 {
 194         struct cdrom_info *cd = drive->driver_data;
 195
 196         ide_init_drive_cmd(rq);
 197         rq->cmd_type = REQ_TYPE_ATA_PC;
 198         rq->rq_disk = cd->disk;
 199 }
 200
 201 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
 202                                       struct request *failed_command)
 203 {
 204         struct cdrom_info *info         = drive->driver_data;
 205         struct request *rq              = &info->request_sense_request;
 206
 207         if (sense == NULL)
 208                 sense = &info->sense_data;
 209
 210         /* stuff the sense request in front of our current request */
 211         ide_cd_init_rq(drive, rq);
 212
 213         rq->data = sense;
 214         rq->cmd[0] = GPCMD_REQUEST_SENSE;
 215         rq->cmd[4] = 18;
 216         rq->data_len = 18;
 217
 218         rq->cmd_type = REQ_TYPE_SENSE;
 219
 220         /* NOTE! Save the failed command in "rq->buffer" */
 221         rq->buffer = (void *) failed_command;
 222
 223         (void) ide_do_drive_cmd(drive, rq, ide_preempt);
 224 }
 225
 226 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
 227 {
 228         struct request *rq = HWGROUP(drive)->rq;
 229         int nsectors = rq->hard_cur_sectors;
 230
 231         if (blk_sense_request(rq) && uptodate) {
 232                 /*
 233                  * For REQ_TYPE_SENSE, "rq->buffer" points to the original
 234                  * failed request
 235                  */
 236                 struct request *failed = (struct request *) rq->buffer;
 237                 struct cdrom_info *info = drive->driver_data;
 238                 void *sense = &info->sense_data;
 239                 unsigned long flags;
 240
 241                 if (failed) {
 242                         if (failed->sense) {
 243                                 sense = failed->sense;
 244                                 failed->sense_len = rq->sense_len;
 245                         }
 246                         cdrom_analyze_sense_data(drive, failed, sense);
 247                         /*
 248                          * now end the failed request
 249                          */
 250                         if (blk_fs_request(failed)) {
 251                                 if (ide_end_dequeued_request(drive, failed, 0,
 252                                                 failed->hard_nr_sectors))
 253                                         BUG();
 254                         } else {
 255                                 spin_lock_irqsave(&ide_lock, flags);
 256                                 if (__blk_end_request(failed, -EIO,
 257                                                       failed->data_len))
 258                                         BUG();
 259                                 spin_unlock_irqrestore(&ide_lock, flags);
 260                         }
 261                 } else
 262                         cdrom_analyze_sense_data(drive, NULL, sense);
 263         }
 264
 265         if (!rq->current_nr_sectors && blk_fs_request(rq))
 266                 uptodate = 1;
 267         /* make sure it's fully ended */
 268         if (blk_pc_request(rq))
 269                 nsectors = (rq->data_len + 511) >> 9;
 270         if (!nsectors)
 271                 nsectors = 1;
 272
 273         ide_end_request(drive, uptodate, nsectors);
 274 }
 275
 276 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
 277 {
 278         if (st & 0x80)
 279                 return;
 280         ide_dump_status(drive, msg, st);
 281 }
 282
 283 /*
 284  * Returns:
 285  * 0: if the request should be continued.
 286  * 1: if the request was ended.
 287  */
 288 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
 289 {
 290         struct request *rq = HWGROUP(drive)->rq;
 291         int stat, err, sense_key;
 292
 293         /* check for errors */
 294         stat = ide_read_status(drive);
 295
 296         if (stat_ret)
 297                 *stat_ret = stat;
 298
 299         if (OK_STAT(stat, good_stat, BAD_R_STAT))
 300                 return 0;
 301
 302         /* get the IDE error register */
 303         err = ide_read_error(drive);
 304         sense_key = err >> 4;
 305
 306         if (rq == NULL) {
 307                 printk(KERN_ERR "%s: missing rq in %s\n",
 308                                 drive->name, __func__);
 309                 return 1;
 310         }
 311
 312         if (blk_sense_request(rq)) {
 313                 /*
 314                  * We got an error trying to get sense info from the drive
 315                  * (probably while trying to recover from a former error).
 316                  * Just give up.
 317                  */
 318                 rq->cmd_flags |= REQ_FAILED;
 319                 cdrom_end_request(drive, 0);
 320                 ide_error(drive, "request sense failure", stat);
 321                 return 1;
 322
 323         } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
 324                 /* All other functions, except for READ. */
 325
 326                 /*
 327                  * if we have an error, pass back CHECK_CONDITION as the
 328                  * scsi status byte
 329                  */
 330                 if (blk_pc_request(rq) && !rq->errors)
 331                         rq->errors = SAM_STAT_CHECK_CONDITION;
 332
 333                 /* check for tray open */
 334                 if (sense_key == NOT_READY) {
 335                         cdrom_saw_media_change(drive);
 336                 } else if (sense_key == UNIT_ATTENTION) {
 337                         /* check for media change */
 338                         cdrom_saw_media_change(drive);
 339                         return 0;
 340                 } else if (sense_key == ILLEGAL_REQUEST &&
 341                            rq->cmd[0] == GPCMD_START_STOP_UNIT) {
 342                         /*
 343                          * Don't print error message for this condition--
 344                          * SFF8090i indicates that 5/24/00 is the correct
 345                          * response to a request to close the tray if the
 346                          * drive doesn't have that capability.
 347                          * cdrom_log_sense() knows this!
 348                          */
 349                 } else if (!(rq->cmd_flags & REQ_QUIET)) {
 350                         /* otherwise, print an error */
 351                         ide_dump_status(drive, "packet command error", stat);
 352                 }
 353
 354                 rq->cmd_flags |= REQ_FAILED;
 355
 356                 /*
 357                  * instead of playing games with moving completions around,
 358                  * remove failed request completely and end it when the
 359                  * request sense has completed
 360                  */
 361                 goto end_request;
 362
 363         } else if (blk_fs_request(rq)) {
 364                 int do_end_request = 0;
 365
 366                 /* handle errors from READ and WRITE requests */
 367
 368                 if (blk_noretry_request(rq))
 369                         do_end_request = 1;
 370
 371                 if (sense_key == NOT_READY) {
 372                         /* tray open */
 373                         if (rq_data_dir(rq) == READ) {
 374                                 cdrom_saw_media_change(drive);
 375
 376                                 /* fail the request */
 377                                 printk(KERN_ERR "%s: tray open\n", drive->name);
 378                                 do_end_request = 1;
 379                         } else {
 380                                 struct cdrom_info *info = drive->driver_data;
 381
 382                                 /*
 383                                  * Allow the drive 5 seconds to recover, some
 384                                  * devices will return this error while flushing
 385                                  * data from cache.
 386                                  */
 387                                 if (!rq->errors)
 388                                         info->write_timeout = jiffies +
 389                                                         ATAPI_WAIT_WRITE_BUSY;
 390                                 rq->errors = 1;
 391                                 if (time_after(jiffies, info->write_timeout))
 392                                         do_end_request = 1;
 393                                 else {
 394                                         unsigned long flags;
 395
 396                                         /*
 397                                          * take a breather relying on the unplug
 398                                          * timer to kick us again
 399                                          */
 400                                         spin_lock_irqsave(&ide_lock, flags);
 401                                         blk_plug_device(drive->queue);
 402                                         spin_unlock_irqrestore(&ide_lock,
 403                                                                 flags);
 404                                         return 1;
 405                                 }
 406                         }
 407                 } else if (sense_key == UNIT_ATTENTION) {
 408                         /* media change */
 409                         cdrom_saw_media_change(drive);
 410
 411                         /*
 412                          * Arrange to retry the request but be sure to give up
 413                          * if we've retried too many times.
 414                          */
 415                         if (++rq->errors > ERROR_MAX)
 416                                 do_end_request = 1;
 417                 } else if (sense_key == ILLEGAL_REQUEST ||
 418                            sense_key == DATA_PROTECT) {
 419                         /*
 420                          * No point in retrying after an illegal request or data
 421                          * protect error.
 422                          */
 423                         ide_dump_status_no_sense(drive, "command error", stat);
 424                         do_end_request = 1;
 425                 } else if (sense_key == MEDIUM_ERROR) {
 426                         /*
 427                          * No point in re-trying a zillion times on a bad
 428                          * sector. If we got here the error is not correctable.
 429                          */
 430                         ide_dump_status_no_sense(drive,
 431                                                  "media error (bad sector)",
 432                                                  stat);
 433                         do_end_request = 1;
 434                 } else if (sense_key == BLANK_CHECK) {
 435                         /* disk appears blank ?? */
 436                         ide_dump_status_no_sense(drive, "media error (blank)",
 437                                                  stat);
 438                         do_end_request = 1;
 439                 } else if ((err & ~ABRT_ERR) != 0) {
 440                         /* go to the default handler for other errors */
 441                         ide_error(drive, "cdrom_decode_status", stat);
 442                         return 1;
 443                 } else if ((++rq->errors > ERROR_MAX)) {
 444                         /* we've racked up too many retries, abort */
 445                         do_end_request = 1;
 446                 }
 447
 448                 /*
 449                  * End a request through request sense analysis when we have
 450                  * sense data. We need this in order to perform end of media
 451                  * processing.
 452                  */
 453                 if (do_end_request)
 454                         goto end_request;
 455
 456                 /*
 457                  * If we got a CHECK_CONDITION status, queue
 458                  * a request sense command.
 459                  */
 460                 if (stat & ERR_STAT)
 461                         cdrom_queue_request_sense(drive, NULL, NULL);
 462         } else {
 463                 blk_dump_rq_flags(rq, "ide-cd: bad rq");
 464                 cdrom_end_request(drive, 0);
 465         }
 466
 467         /* retry, or handle the next request */
 468         return 1;
 469
 470 end_request:
 471         if (stat & ERR_STAT) {
 472                 unsigned long flags;
 473
 474                 spin_lock_irqsave(&ide_lock, flags);
 475                 blkdev_dequeue_request(rq);
 476                 HWGROUP(drive)->rq = NULL;
 477                 spin_unlock_irqrestore(&ide_lock, flags);
 478
 479                 cdrom_queue_request_sense(drive, rq->sense, rq);
 480         } else
 481                 cdrom_end_request(drive, 0);
 482
 483         return 1;
 484 }
 485
 486 static int cdrom_timer_expiry(ide_drive_t *drive)
 487 {
 488         struct request *rq = HWGROUP(drive)->rq;
 489         unsigned long wait = 0;
 490
 491         /*
 492          * Some commands are *slow* and normally take a long time to complete.
 493          * Usually we can use the ATAPI "disconnect" to bypass this, but not all
 494          * commands/drives support that. Let ide_timer_expiry keep polling us
 495          * for these.
 496          */
 497         switch (rq->cmd[0]) {
 498         case GPCMD_BLANK:
 499         case GPCMD_FORMAT_UNIT:
 500         case GPCMD_RESERVE_RZONE_TRACK:
 501         case GPCMD_CLOSE_TRACK:
 502         case GPCMD_FLUSH_CACHE:
 503                 wait = ATAPI_WAIT_PC;
 504                 break;
 505         default:
 506                 if (!(rq->cmd_flags & REQ_QUIET))
 507                         printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n",
 508                                          rq->cmd[0]);
 509                 wait = 0;
 510                 break;
 511         }
 512         return wait;
 513 }
 514
 515 /*
 516  * Set up the device registers for transferring a packet command on DEV,
 517  * expecting to later transfer XFERLEN bytes.  HANDLER is the routine
 518  * which actually transfers the command to the drive.  If this is a
 519  * drq_interrupt device, this routine will arrange for HANDLER to be
 520  * called when the interrupt from the drive arrives.  Otherwise, HANDLER
 521  * will be called immediately after the drive is prepared for the transfer.
 522  */
 523 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
 524                                                   int xferlen,
 525                                                   ide_handler_t *handler)
 526 {
 527         ide_startstop_t startstop;
 528         struct cdrom_info *info = drive->driver_data;
 529         ide_hwif_t *hwif = drive->hwif;
 530
 531         /* wait for the controller to be idle */
 532         if (ide_wait_stat(&startstop, drive, 0, BUSY_STAT, WAIT_READY))
 533                 return startstop;
 534
 535         /* FIXME: for Virtual DMA we must check harder */
 536         if (info->dma)
 537                 info->dma = !hwif->dma_ops->dma_setup(drive);
 538
 539         /* set up the controller registers */
 540         ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL |
 541                            IDE_TFLAG_NO_SELECT_MASK, xferlen, info->dma);
 542
 543         if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) {
 544                 /* waiting for CDB interrupt, not DMA yet. */
 545                 if (info->dma)
 546                         drive->waiting_for_dma = 0;
 547
 548                 /* packet command */
 549                 ide_execute_command(drive, WIN_PACKETCMD, handler,
 550                                     ATAPI_WAIT_PC, cdrom_timer_expiry);
 551                 return ide_started;
 552         } else {
 553                 ide_execute_pkt_cmd(drive);
 554
 555                 return (*handler) (drive);
 556         }
 557 }
 558
 559 /*
 560  * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
 561  * registers must have already been prepared by cdrom_start_packet_command.
 562  * HANDLER is the interrupt handler to call when the command completes or
 563  * there's data ready.
 564  */
 565 #define ATAPI_MIN_CDB_BYTES 12
 566 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive,
 567                                           struct request *rq,
 568                                           ide_handler_t *handler)
 569 {
 570         ide_hwif_t *hwif = drive->hwif;
 571         int cmd_len;
 572         struct cdrom_info *info = drive->driver_data;
 573         ide_startstop_t startstop;
 574
 575         if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) {
 576                 /*
 577                  * Here we should have been called after receiving an interrupt
 578                  * from the device.  DRQ should how be set.
 579                  */
 580
 581                 /* check for errors */
 582                 if (cdrom_decode_status(drive, DRQ_STAT, NULL))
 583                         return ide_stopped;
 584
 585                 /* ok, next interrupt will be DMA interrupt */
 586                 if (info->dma)
 587                         drive->waiting_for_dma = 1;
 588         } else {
 589                 /* otherwise, we must wait for DRQ to get set */
 590                 if (ide_wait_stat(&startstop, drive, DRQ_STAT,
 591                                 BUSY_STAT, WAIT_READY))
 592                         return startstop;
 593         }
 594
 595         /* arm the interrupt handler */
 596         ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry);
 597
 598         /* ATAPI commands get padded out to 12 bytes minimum */
 599         cmd_len = COMMAND_SIZE(rq->cmd[0]);
 600         if (cmd_len < ATAPI_MIN_CDB_BYTES)
 601                 cmd_len = ATAPI_MIN_CDB_BYTES;
 602
 603         /* send the command to the device */
 604         hwif->output_data(drive, NULL, rq->cmd, cmd_len);
 605
 606         /* start the DMA if need be */
 607         if (info->dma)
 608                 hwif->dma_ops->dma_start(drive);
 609
 610         return ide_started;
 611 }
 612
 613 /*
 614  * Block read functions.
 615  */
 616 static void ide_cd_pad_transfer(ide_drive_t *drive, xfer_func_t *xf, int len)
 617 {
 618         while (len > 0) {
 619                 int dum = 0;
 620                 xf(drive, NULL, &dum, sizeof(dum));
 621                 len -= sizeof(dum);
 622         }
 623 }
 624
 625 static void ide_cd_drain_data(ide_drive_t *drive, int nsects)
 626 {
 627         while (nsects > 0) {
 628                 static char dum[SECTOR_SIZE];
 629
 630                 drive->hwif->input_data(drive, NULL, dum, sizeof(dum));
 631                 nsects--;
 632         }
 633 }
 634
 635 /*
 636  * Check the contents of the interrupt reason register from the cdrom
 637  * and attempt to recover if there are problems.  Returns  0 if everything's
 638  * ok; nonzero if the request has been terminated.
 639  */
 640 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
 641                                 int len, int ireason, int rw)
 642 {
 643         /*
 644          * ireason == 0: the drive wants to receive data from us
 645          * ireason == 2: the drive is expecting to transfer data to us
 646          */
 647         if (ireason == (!rw << 1))
 648                 return 0;
 649         else if (ireason == (rw << 1)) {
 650                 ide_hwif_t *hwif = drive->hwif;
 651                 xfer_func_t *xf;
 652
 653                 /* whoops... */
 654                 printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
 655                                 drive->name, __func__);
 656
 657                 xf = rw ? hwif->output_data : hwif->input_data;
 658                 ide_cd_pad_transfer(drive, xf, len);
 659         } else  if (rw == 0 && ireason == 1) {
 660                 /*
 661                  * Some drives (ASUS) seem to tell us that status info is
 662                  * available.  Just get it and ignore.
 663                  */
 664                 (void)ide_read_status(drive);
 665                 return 0;
 666         } else {
 667                 /* drive wants a command packet, or invalid ireason... */
 668                 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n",
 669                                 drive->name, __func__, ireason);
 670         }
 671
 672         if (rq->cmd_type == REQ_TYPE_ATA_PC)
 673                 rq->cmd_flags |= REQ_FAILED;
 674
 675         cdrom_end_request(drive, 0);
 676         return -1;
 677 }
 678
 679 /*
 680  * Assume that the drive will always provide data in multiples of at least
 681  * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
 682  */
 683 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
 684 {
 685         struct cdrom_info *cd = drive->driver_data;
 686
 687         if ((len % SECTOR_SIZE) == 0)
 688                 return 0;
 689
 690         printk(KERN_ERR "%s: %s: Bad transfer size %d\n",
 691                         drive->name, __func__, len);
 692
 693         if (cd->cd_flags & IDE_CD_FLAG_LIMIT_NFRAMES)
 694                 printk(KERN_ERR "  This drive is not supported by "
 695                                 "this version of the driver\n");
 696         else {
 697                 printk(KERN_ERR "  Trying to limit transfer sizes\n");
 698                 cd->cd_flags |= IDE_CD_FLAG_LIMIT_NFRAMES;
 699         }
 700
 701         return 1;
 702 }
 703
 704 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
 705
 706 /*
 707  * Routine to send a read/write packet command to the drive. This is usually
 708  * called directly from cdrom_start_{read,write}(). However, for drq_interrupt
 709  * devices, it is called from an interrupt when the drive is ready to accept
 710  * the command.
 711  */
 712 static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive)
 713 {
 714         struct request *rq = HWGROUP(drive)->rq;
 715
 716         if (rq_data_dir(rq) == READ) {
 717                 unsigned short sectors_per_frame =
 718                         queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 719                 int nskip = rq->sector & (sectors_per_frame - 1);
 720
 721                 /*
 722                  * If the requested sector doesn't start on a frame boundary,
 723                  * we must adjust the start of the transfer so that it does,
 724                  * and remember to skip the first few sectors.
 725                  *
 726                  * If the rq->current_nr_sectors field is larger than the size
 727                  * of the buffer, it will mean that we're to skip a number of
 728                  * sectors equal to the amount by which rq->current_nr_sectors
 729                  * is larger than the buffer size.
 730                  */
 731                 if (nskip > 0) {
 732                         /* sanity check... */
 733                         if (rq->current_nr_sectors !=
 734                             bio_cur_sectors(rq->bio)) {
 735                                 printk(KERN_ERR "%s: %s: buffer botch (%u)\n",
 736                                                 drive->name, __func__,
 737                                                 rq->current_nr_sectors);
 738                                 cdrom_end_request(drive, 0);
 739                                 return ide_stopped;
 740                         }
 741                         rq->current_nr_sectors += nskip;
 742                 }
 743         }
 744 #if 0
 745         else
 746                 /* the immediate bit */
 747                 rq->cmd[1] = 1 << 3;
 748 #endif
 749         /* set up the command */
 750         rq->timeout = ATAPI_WAIT_PC;
 751
 752         /* send the command to the drive and return */
 753         return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
 754 }
 755
 756 #define IDECD_SEEK_THRESHOLD    (1000)                  /* 1000 blocks */
 757 #define IDECD_SEEK_TIMER        (5 * WAIT_MIN_SLEEP)    /* 100 ms */
 758 #define IDECD_SEEK_TIMEOUT      (2 * WAIT_CMD)          /* 20 sec */
 759
 760 static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive)
 761 {
 762         struct cdrom_info *info = drive->driver_data;
 763         int stat;
 764         static int retry = 10;
 765
 766         if (cdrom_decode_status(drive, 0, &stat))
 767                 return ide_stopped;
 768
 769         info->cd_flags |= IDE_CD_FLAG_SEEKING;
 770
 771         if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) {
 772                 if (--retry == 0)
 773                         drive->dsc_overlap = 0;
 774         }
 775         return ide_stopped;
 776 }
 777
 778 static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive)
 779 {
 780         struct request *rq = HWGROUP(drive)->rq;
 781         sector_t frame = rq->sector;
 782
 783         sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS);
 784
 785         memset(rq->cmd, 0, BLK_MAX_CDB);
 786         rq->cmd[0] = GPCMD_SEEK;
 787         put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]);
 788
 789         rq->timeout = ATAPI_WAIT_PC;
 790         return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
 791 }
 792
 793 static ide_startstop_t cdrom_start_seek(ide_drive_t *drive, unsigned int block)
 794 {
 795         struct cdrom_info *info = drive->driver_data;
 796
 797         info->dma = 0;
 798         info->start_seek = jiffies;
 799         return cdrom_start_packet_command(drive, 0,
 800                                           cdrom_start_seek_continuation);
 801 }
 802
 803 /*
 804  * Fix up a possibly partially-processed request so that we can start it over
 805  * entirely, or even put it back on the request queue.
 806  */
 807 static void restore_request(struct request *rq)
 808 {
 809         if (rq->buffer != bio_data(rq->bio)) {
 810                 sector_t n =
 811                         (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
 812
 813                 rq->buffer = bio_data(rq->bio);
 814                 rq->nr_sectors += n;
 815                 rq->sector -= n;
 816         }
 817         rq->current_nr_sectors = bio_cur_sectors(rq->bio);
 818         rq->hard_cur_sectors = rq->current_nr_sectors;
 819         rq->hard_nr_sectors = rq->nr_sectors;
 820         rq->hard_sector = rq->sector;
 821         rq->q->prep_rq_fn(rq->q, rq);
 822 }
 823
 824 /*
 825  * All other packet commands.
 826  */
 827 static void ide_cd_request_sense_fixup(struct request *rq)
 828 {
 829         /*
 830          * Some of the trailing request sense fields are optional,
 831          * and some drives don't send them.  Sigh.
 832          */
 833         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 834             rq->data_len > 0 && rq->data_len <= 5)
 835                 while (rq->data_len > 0) {
 836                         *(u8 *)rq->data++ = 0;
 837                         --rq->data_len;
 838                 }
 839 }
 840
 841 int ide_cd_queue_pc(ide_drive_t *drive, struct request *rq)
 842 {
 843         struct request_sense sense;
 844         int retries = 10;
 845         unsigned int flags = rq->cmd_flags;
 846
 847         if (rq->sense == NULL)
 848                 rq->sense = &sense;
 849
 850         /* start of retry loop */
 851         do {
 852                 int error;
 853                 unsigned long time = jiffies;
 854                 rq->cmd_flags = flags;
 855
 856                 error = ide_do_drive_cmd(drive, rq, ide_wait);
 857                 time = jiffies - time;
 858
 859                 /*
 860                  * FIXME: we should probably abort/retry or something in case of
 861                  * failure.
 862                  */
 863                 if (rq->cmd_flags & REQ_FAILED) {
 864                         /*
 865                          * The request failed.  Retry if it was due to a unit
 866                          * attention status (usually means media was changed).
 867                          */
 868                         struct request_sense *reqbuf = rq->sense;
 869
 870                         if (reqbuf->sense_key == UNIT_ATTENTION)
 871                                 cdrom_saw_media_change(drive);
 872                         else if (reqbuf->sense_key == NOT_READY &&
 873                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 874                                 /*
 875                                  * The drive is in the process of loading
 876                                  * a disk.  Retry, but wait a little to give
 877                                  * the drive time to complete the load.
 878                                  */
 879                                 ssleep(2);
 880                         } else {
 881                                 /* otherwise, don't retry */
 882                                 retries = 0;
 883                         }
 884                         --retries;
 885                 }
 886
 887                 /* end of retry loop */
 888         } while ((rq->cmd_flags & REQ_FAILED) && retries >= 0);
 889
 890         /* return an error if the command failed */
 891         return (rq->cmd_flags & REQ_FAILED) ? -EIO : 0;
 892 }
 893
 894 /*
 895  * Called from blk_end_request_callback() after the data of the request is
 896  * completed and before the request itself is completed. By returning value '1',
 897  * blk_end_request_callback() returns immediately without completing it.
 898  */
 899 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
 900 {
 901         return 1;
 902 }
 903
 904 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 905 {
 906         ide_hwif_t *hwif = drive->hwif;
 907         struct cdrom_info *info = drive->driver_data;
 908         struct request *rq = HWGROUP(drive)->rq;
 909         xfer_func_t *xferfunc;
 910         ide_expiry_t *expiry = NULL;
 911         int dma_error = 0, dma, stat, ireason, len, thislen, uptodate = 0;
 912         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
 913         unsigned int timeout;
 914         u8 lowcyl, highcyl;
 915
 916         /* check for errors */
 917         dma = info->dma;
 918         if (dma) {
 919                 info->dma = 0;
 920                 dma_error = hwif->dma_ops->dma_end(drive);
 921                 if (dma_error) {
 922                         printk(KERN_ERR "%s: DMA %s error\n", drive->name,
 923                                         write ? "write" : "read");
 924                         ide_dma_off(drive);
 925                 }
 926         }
 927
 928         if (cdrom_decode_status(drive, 0, &stat))
 929                 return ide_stopped;
 930
 931         /* using dma, transfer is complete now */
 932         if (dma) {
 933                 if (dma_error)
 934                         return ide_error(drive, "dma error", stat);
 935                 if (blk_fs_request(rq)) {
 936                         ide_end_request(drive, 1, rq->nr_sectors);
 937                         return ide_stopped;
 938                 }
 939                 goto end_request;
 940         }
 941
 942         /* ok we fall to pio :/ */
 943         ireason = hwif->INB(hwif->io_ports.nsect_addr) & 0x3;
 944         lowcyl  = hwif->INB(hwif->io_ports.lbam_addr);
 945         highcyl = hwif->INB(hwif->io_ports.lbah_addr);
 946
 947         len = lowcyl + (256 * highcyl);
 948
 949         thislen = blk_fs_request(rq) ? len : rq->data_len;
 950         if (thislen > len)
 951                 thislen = len;
 952
 953         /* If DRQ is clear, the command has completed. */
 954         if ((stat & DRQ_STAT) == 0) {
 955                 if (blk_fs_request(rq)) {
 956                         /*
 957                          * If we're not done reading/writing, complain.
 958                          * Otherwise, complete the command normally.
 959                          */
 960                         uptodate = 1;
 961                         if (rq->current_nr_sectors > 0) {
 962                                 printk(KERN_ERR "%s: %s: data underrun "
 963                                                 "(%d blocks)\n",
 964                                                 drive->name, __func__,
 965                                                 rq->current_nr_sectors);
 966                                 if (!write)
 967                                         rq->cmd_flags |= REQ_FAILED;
 968                                 uptodate = 0;
 969                         }
 970                         cdrom_end_request(drive, uptodate);
 971                         return ide_stopped;
 972                 } else if (!blk_pc_request(rq)) {
 973                         ide_cd_request_sense_fixup(rq);
 974                         /* complain if we still have data left to transfer */
 975                         uptodate = rq->data_len ? 0 : 1;
 976                 }
 977                 goto end_request;
 978         }
 979
 980         /* check which way to transfer data */
 981         if (ide_cd_check_ireason(drive, rq, len, ireason, write))
 982                 return ide_stopped;
 983
 984         if (blk_fs_request(rq)) {
 985                 if (write == 0) {
 986                         int nskip;
 987
 988                         if (ide_cd_check_transfer_size(drive, len)) {
 989                                 cdrom_end_request(drive, 0);
 990                                 return ide_stopped;
 991                         }
 992
 993                         /*
 994                          * First, figure out if we need to bit-bucket
 995                          * any of the leading sectors.
 996                          */
 997                         nskip = min_t(int, rq->current_nr_sectors
 998                                            - bio_cur_sectors(rq->bio),
 999                                            thislen >> 9);
1000                         if (nskip > 0) {
1001                                 ide_cd_drain_data(drive, nskip);
1002                                 rq->current_nr_sectors -= nskip;
1003                                 thislen -= (nskip << 9);
1004                         }
1005                 }
1006         }
1007
1008         if (ireason == 0) {
1009                 write = 1;
1010                 xferfunc = hwif->output_data;
1011         } else {
1012                 write = 0;
1013                 xferfunc = hwif->input_data;
1014         }
1015
1016         /* transfer data */
1017         while (thislen > 0) {
1018                 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
1019                 int blen = rq->data_len;
1020
1021                 /* bio backed? */
1022                 if (rq->bio) {
1023                         if (blk_fs_request(rq)) {
1024                                 ptr = rq->buffer;
1025                                 blen = rq->current_nr_sectors << 9;
1026                         } else {
1027                                 ptr = bio_data(rq->bio);
1028                                 blen = bio_iovec(rq->bio)->bv_len;
1029                         }
1030                 }
1031
1032                 if (!ptr) {
1033                         if (blk_fs_request(rq) && !write)
1034                                 /*
1035                                  * If the buffers are full, pipe the rest into
1036                                  * oblivion.
1037                                  */
1038                                 ide_cd_drain_data(drive, thislen >> 9);
1039                         else {
1040                                 printk(KERN_ERR "%s: confused, missing data\n",
1041                                                 drive->name);
1042                                 blk_dump_rq_flags(rq, rq_data_dir(rq)
1043                                                   ? "cdrom_newpc_intr, write"
1044                                                   : "cdrom_newpc_intr, read");
1045                         }
1046                         break;
1047                 }
1048
1049                 if (blen > thislen)
1050                         blen = thislen;
1051
1052                 xferfunc(drive, NULL, ptr, blen);
1053
1054                 thislen -= blen;
1055                 len -= blen;
1056
1057                 if (blk_fs_request(rq)) {
1058                         rq->buffer += blen;
1059                         rq->nr_sectors -= (blen >> 9);
1060                         rq->current_nr_sectors -= (blen >> 9);
1061                         rq->sector += (blen >> 9);
1062
1063                         if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1064                                 cdrom_end_request(drive, 1);
1065                 } else {
1066                         rq->data_len -= blen;
1067
1068                         /*
1069                          * The request can't be completed until DRQ is cleared.
1070                          * So complete the data, but don't complete the request
1071                          * using the dummy function for the callback feature
1072                          * of blk_end_request_callback().
1073                          */
1074                         if (rq->bio)
1075                                 blk_end_request_callback(rq, 0, blen,
1076                                                  cdrom_newpc_intr_dummy_cb);
1077                         else
1078                                 rq->data += blen;
1079                 }
1080                 if (!write && blk_sense_request(rq))
1081                         rq->sense_len += blen;
1082         }
1083
1084         /* pad, if necessary */
1085         if (!blk_fs_request(rq) && len > 0)
1086                 ide_cd_pad_transfer(drive, xferfunc, len);
1087
1088         if (blk_pc_request(rq)) {
1089                 timeout = rq->timeout;
1090         } else {
1091                 timeout = ATAPI_WAIT_PC;
1092                 if (!blk_fs_request(rq))
1093                         expiry = cdrom_timer_expiry;
1094         }
1095
1096         ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1097         return ide_started;
1098
1099 end_request:
1100         if (blk_pc_request(rq)) {
1101                 unsigned long flags;
1102                 unsigned int dlen = rq->data_len;
1103
1104                 if (dma)
1105                         rq->data_len = 0;
1106
1107                 spin_lock_irqsave(&ide_lock, flags);
1108                 if (__blk_end_request(rq, 0, dlen))
1109                         BUG();
1110                 HWGROUP(drive)->rq = NULL;
1111                 spin_unlock_irqrestore(&ide_lock, flags);
1112         } else {
1113                 if (!uptodate)
1114                         rq->cmd_flags |= REQ_FAILED;
1115                 cdrom_end_request(drive, uptodate);
1116         }
1117         return ide_stopped;
1118 }
1119
1120 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1121 {
1122         struct cdrom_info *cd = drive->driver_data;
1123         int write = rq_data_dir(rq) == WRITE;
1124         unsigned short sectors_per_frame =
1125                 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1126
1127         if (write) {
1128                 /* disk has become write protected */
1129                 if (cd->disk->policy) {
1130                         cdrom_end_request(drive, 0);
1131                         return ide_stopped;
1132                 }
1133         } else {
1134                 /*
1135                  * We may be retrying this request after an error.  Fix up any
1136                  * weirdness which might be present in the request packet.
1137                  */
1138                 restore_request(rq);
1139         }
1140
1141         /* use DMA, if possible / writes *must* be hardware frame aligned */
1142         if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1143             (rq->sector & (sectors_per_frame - 1))) {
1144                 if (write) {
1145                         cdrom_end_request(drive, 0);
1146                         return ide_stopped;
1147                 }
1148                 cd->dma = 0;
1149         } else
1150                 cd->dma = drive->using_dma;
1151
1152         if (write)
1153                 cd->devinfo.media_written = 1;
1154
1155         /* start sending the read/write request to the drive */
1156         return cdrom_start_packet_command(drive, 32768, cdrom_start_rw_cont);
1157 }
1158
1159 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1160 {
1161         struct request *rq = HWGROUP(drive)->rq;
1162
1163         if (!rq->timeout)
1164                 rq->timeout = ATAPI_WAIT_PC;
1165
1166         return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1167 }
1168
1169 static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1170 {
1171         struct cdrom_info *info = drive->driver_data;
1172
1173         if (blk_pc_request(rq))
1174                 rq->cmd_flags |= REQ_QUIET;
1175         else
1176                 rq->cmd_flags &= ~REQ_FAILED;
1177
1178         info->dma = 0;
1179
1180         /* sg request */
1181         if (rq->bio) {
1182                 int mask = drive->queue->dma_alignment;
1183                 unsigned long addr =
1184                         (unsigned long)page_address(bio_page(rq->bio));
1185
1186                 info->dma = drive->using_dma;
1187
1188                 /*
1189                  * check if dma is safe
1190                  *
1191                  * NOTE! The "len" and "addr" checks should possibly have
1192                  * separate masks.
1193                  */
1194                 if ((rq->data_len & 15) || (addr & mask))
1195                         info->dma = 0;
1196         }
1197
1198         /* start sending the command to the drive */
1199         return cdrom_start_packet_command(drive, rq->data_len,
1200                                           cdrom_do_newpc_cont);
1201 }
1202
1203 /*
1204  * cdrom driver request routine.
1205  */
1206 static ide_startstop_t ide_do_rw_cdrom(ide_drive_t *drive, struct request *rq,
1207                                         sector_t block)
1208 {
1209         ide_startstop_t action;
1210         struct cdrom_info *info = drive->driver_data;
1211
1212         if (blk_fs_request(rq)) {
1213                 if (info->cd_flags & IDE_CD_FLAG_SEEKING) {
1214                         unsigned long elapsed = jiffies - info->start_seek;
1215                         int stat = ide_read_status(drive);
1216
1217                         if ((stat & SEEK_STAT) != SEEK_STAT) {
1218                                 if (elapsed < IDECD_SEEK_TIMEOUT) {
1219                                         ide_stall_queue(drive,
1220                                                         IDECD_SEEK_TIMER);
1221                                         return ide_stopped;
1222                                 }
1223                                 printk(KERN_ERR "%s: DSC timeout\n",
1224                                                 drive->name);
1225                         }
1226                         info->cd_flags &= ~IDE_CD_FLAG_SEEKING;
1227                 }
1228                 if (rq_data_dir(rq) == READ &&
1229                     IDE_LARGE_SEEK(info->last_block, block,
1230                                    IDECD_SEEK_THRESHOLD) &&
1231                     drive->dsc_overlap)
1232                         action = cdrom_start_seek(drive, block);
1233                 else
1234                         action = cdrom_start_rw(drive, rq);
1235                 info->last_block = block;
1236                 return action;
1237         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1238                    rq->cmd_type == REQ_TYPE_ATA_PC) {
1239                 return cdrom_do_block_pc(drive, rq);
1240         } else if (blk_special_request(rq)) {
1241                 /* right now this can only be a reset... */
1242                 cdrom_end_request(drive, 1);
1243                 return ide_stopped;
1244         }
1245
1246         blk_dump_rq_flags(rq, "ide-cd bad flags");
1247         cdrom_end_request(drive, 0);
1248         return ide_stopped;
1249 }
1250
1251
1252
1253 /*
1254  * Ioctl handling.
1255  *
1256  * Routines which queue packet commands take as a final argument a pointer to a
1257  * request_sense struct. If execution of the command results in an error with a
1258  * CHECK CONDITION status, this structure will be filled with the results of the
1259  * subsequent request sense command. The pointer can also be NULL, in which case
1260  * no sense information is returned.
1261  */
1262 static void msf_from_bcd(struct atapi_msf *msf)
1263 {
1264         msf->minute = BCD2BIN(msf->minute);
1265         msf->second = BCD2BIN(msf->second);
1266         msf->frame  = BCD2BIN(msf->frame);
1267 }
1268
1269 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1270 {
1271         struct request req;
1272         struct cdrom_info *info = drive->driver_data;
1273         struct cdrom_device_info *cdi = &info->devinfo;
1274
1275         ide_cd_init_rq(drive, &req);
1276
1277         req.sense = sense;
1278         req.cmd[0] = GPCMD_TEST_UNIT_READY;
1279         req.cmd_flags |= REQ_QUIET;
1280
1281         /*
1282          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1283          * instead of supporting the LOAD_UNLOAD opcode.
1284          */
1285         req.cmd[7] = cdi->sanyo_slot % 3;
1286
1287         return ide_cd_queue_pc(drive, &req);
1288 }
1289
1290 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1291                                unsigned long *sectors_per_frame,
1292                                struct request_sense *sense)
1293 {
1294         struct {
1295                 __u32 lba;
1296                 __u32 blocklen;
1297         } capbuf;
1298
1299         int stat;
1300         struct request req;
1301
1302         ide_cd_init_rq(drive, &req);
1303
1304         req.sense = sense;
1305         req.cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1306         req.data = (char *)&capbuf;
1307         req.data_len = sizeof(capbuf);
1308         req.cmd_flags |= REQ_QUIET;
1309
1310         stat = ide_cd_queue_pc(drive, &req);
1311         if (stat == 0) {
1312                 *capacity = 1 + be32_to_cpu(capbuf.lba);
1313                 *sectors_per_frame =
1314                         be32_to_cpu(capbuf.blocklen) >> SECTOR_BITS;
1315         }
1316
1317         return stat;
1318 }
1319
1320 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1321                                 int format, char *buf, int buflen,
1322                                 struct request_sense *sense)
1323 {
1324         struct request req;
1325
1326         ide_cd_init_rq(drive, &req);
1327
1328         req.sense = sense;
1329         req.data =  buf;
1330         req.data_len = buflen;
1331         req.cmd_flags |= REQ_QUIET;
1332         req.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1333         req.cmd[6] = trackno;
1334         req.cmd[7] = (buflen >> 8);
1335         req.cmd[8] = (buflen & 0xff);
1336         req.cmd[9] = (format << 6);
1337
1338         if (msf_flag)
1339                 req.cmd[1] = 2;
1340
1341         return ide_cd_queue_pc(drive, &req);
1342 }
1343
1344 /* Try to read the entire TOC for the disk into our internal buffer. */
1345 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1346 {
1347         int stat, ntracks, i;
1348         struct cdrom_info *info = drive->driver_data;
1349         struct cdrom_device_info *cdi = &info->devinfo;
1350         struct atapi_toc *toc = info->toc;
1351         struct {
1352                 struct atapi_toc_header hdr;
1353                 struct atapi_toc_entry  ent;
1354         } ms_tmp;
1355         long last_written;
1356         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1357
1358         if (toc == NULL) {
1359                 /* try to allocate space */
1360                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1361                 if (toc == NULL) {
1362                         printk(KERN_ERR "%s: No cdrom TOC buffer!\n",
1363                                         drive->name);
1364                         return -ENOMEM;
1365                 }
1366                 info->toc = toc;
1367         }
1368
1369         /*
1370          * Check to see if the existing data is still valid. If it is,
1371          * just return.
1372          */
1373         (void) cdrom_check_status(drive, sense);
1374
1375         if (info->cd_flags & IDE_CD_FLAG_TOC_VALID)
1376                 return 0;
1377
1378         /* try to get the total cdrom capacity and sector size */
1379         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1380                                    sense);
1381         if (stat)
1382                 toc->capacity = 0x1fffff;
1383
1384         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1385         /* save a private copy of the TOC capacity for error handling */
1386         drive->probed_capacity = toc->capacity * sectors_per_frame;
1387
1388         blk_queue_hardsect_size(drive->queue,
1389                                 sectors_per_frame << SECTOR_BITS);
1390
1391         /* first read just the header, so we know how long the TOC is */
1392         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1393                                     sizeof(struct atapi_toc_header), sense);
1394         if (stat)
1395                 return stat;
1396
1397         if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1398                 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1399                 toc->hdr.last_track  = BCD2BIN(toc->hdr.last_track);
1400         }
1401
1402         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1403         if (ntracks <= 0)
1404                 return -EIO;
1405         if (ntracks > MAX_TRACKS)
1406                 ntracks = MAX_TRACKS;
1407
1408         /* now read the whole schmeer */
1409         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1410                                   (char *)&toc->hdr,
1411                                    sizeof(struct atapi_toc_header) +
1412                                    (ntracks + 1) *
1413                                    sizeof(struct atapi_toc_entry), sense);
1414
1415         if (stat && toc->hdr.first_track > 1) {
1416                 /*
1417                  * Cds with CDI tracks only don't have any TOC entries, despite
1418                  * of this the returned values are
1419                  * first_track == last_track = number of CDI tracks + 1,
1420                  * so that this case is indistinguishable from the same layout
1421                  * plus an additional audio track. If we get an error for the
1422                  * regular case, we assume a CDI without additional audio
1423                  * tracks. In this case the readable TOC is empty (CDI tracks
1424                  * are not included) and only holds the Leadout entry.
1425                  *
1426                  * Heiko Eißfeldt.
1427                  */
1428                 ntracks = 0;
1429                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1430                                            (char *)&toc->hdr,
1431                                            sizeof(struct atapi_toc_header) +
1432                                            (ntracks + 1) *
1433                                            sizeof(struct atapi_toc_entry),
1434                                            sense);
1435                 if (stat)
1436                         return stat;
1437
1438                 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1439                         toc->hdr.first_track = (u8)BIN2BCD(CDROM_LEADOUT);
1440                         toc->hdr.last_track = (u8)BIN2BCD(CDROM_LEADOUT);
1441                 } else {
1442                         toc->hdr.first_track = CDROM_LEADOUT;
1443                         toc->hdr.last_track = CDROM_LEADOUT;
1444                 }
1445         }
1446
1447         if (stat)
1448                 return stat;
1449
1450         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1451
1452         if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1453                 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1454                 toc->hdr.last_track  = BCD2BIN(toc->hdr.last_track);
1455         }
1456
1457         for (i = 0; i <= ntracks; i++) {
1458                 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1459                         if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD)
1460                                 toc->ent[i].track = BCD2BIN(toc->ent[i].track);
1461                         msf_from_bcd(&toc->ent[i].addr.msf);
1462                 }
1463                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1464                                                   toc->ent[i].addr.msf.second,
1465                                                   toc->ent[i].addr.msf.frame);
1466         }
1467
1468         if (toc->hdr.first_track != CDROM_LEADOUT) {
1469                 /* read the multisession information */
1470                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1471                                            sizeof(ms_tmp), sense);
1472                 if (stat)
1473                         return stat;
1474
1475                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1476         } else {
1477                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1478                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1479                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1480         }
1481
1482         if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1483                 /* re-read multisession information using MSF format */
1484                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1485                                            sizeof(ms_tmp), sense);
1486                 if (stat)
1487                         return stat;
1488
1489                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1490                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1491                                                    ms_tmp.ent.addr.msf.second,
1492                                                    ms_tmp.ent.addr.msf.frame);
1493         }
1494
1495         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1496
1497         /* now try to get the total cdrom capacity */
1498         stat = cdrom_get_last_written(cdi, &last_written);
1499         if (!stat && (last_written > toc->capacity)) {
1500                 toc->capacity = last_written;
1501                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1502                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1503         }
1504
1505         /* Remember that we've read this stuff. */
1506         info->cd_flags |= IDE_CD_FLAG_TOC_VALID;
1507
1508         return 0;
1509 }
1510
1511 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1512 {
1513         struct cdrom_info *info = drive->driver_data;
1514         struct cdrom_device_info *cdi = &info->devinfo;
1515         struct packet_command cgc;
1516         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1517
1518         if ((info->cd_flags & IDE_CD_FLAG_FULL_CAPS_PAGE) == 0)
1519                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1520
1521         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1522         do {
1523                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1524                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1525                 if (!stat)
1526                         break;
1527         } while (--attempts);
1528         return stat;
1529 }
1530
1531 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1532 {
1533         struct cdrom_info *cd = drive->driver_data;
1534         u16 curspeed, maxspeed;
1535
1536         curspeed = *(u16 *)&buf[8 + 14];
1537         maxspeed = *(u16 *)&buf[8 +  8];
1538
1539         if (cd->cd_flags & IDE_CD_FLAG_LE_SPEED_FIELDS) {
1540                 curspeed = le16_to_cpu(curspeed);
1541                 maxspeed = le16_to_cpu(maxspeed);
1542         } else {
1543                 curspeed = be16_to_cpu(curspeed);
1544                 maxspeed = be16_to_cpu(maxspeed);
1545         }
1546
1547         cd->current_speed = (curspeed + (176/2)) / 176;
1548         cd->max_speed = (maxspeed + (176/2)) / 176;
1549 }
1550
1551 #define IDE_CD_CAPABILITIES \
1552         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1553          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1554          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1555          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1556          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1557
1558 static struct cdrom_device_ops ide_cdrom_dops = {
1559         .open                   = ide_cdrom_open_real,
1560         .release                = ide_cdrom_release_real,
1561         .drive_status           = ide_cdrom_drive_status,
1562         .media_changed          = ide_cdrom_check_media_change_real,
1563         .tray_move              = ide_cdrom_tray_move,
1564         .lock_door              = ide_cdrom_lock_door,
1565         .select_speed           = ide_cdrom_select_speed,
1566         .get_last_session       = ide_cdrom_get_last_session,
1567         .get_mcn                = ide_cdrom_get_mcn,
1568         .reset                  = ide_cdrom_reset,
1569         .audio_ioctl            = ide_cdrom_audio_ioctl,
1570         .capability             = IDE_CD_CAPABILITIES,
1571         .generic_packet         = ide_cdrom_packet,
1572 };
1573
1574 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1575 {
1576         struct cdrom_info *info = drive->driver_data;
1577         struct cdrom_device_info *devinfo = &info->devinfo;
1578
1579         devinfo->ops = &ide_cdrom_dops;
1580         devinfo->speed = info->current_speed;
1581         devinfo->capacity = nslots;
1582         devinfo->handle = drive;
1583         strcpy(devinfo->name, drive->name);
1584
1585         if (info->cd_flags & IDE_CD_FLAG_NO_SPEED_SELECT)
1586                 devinfo->mask |= CDC_SELECT_SPEED;
1587
1588         devinfo->disk = info->disk;
1589         return register_cdrom(devinfo);
1590 }
1591
1592 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1593 {
1594         struct cdrom_info *cd = drive->driver_data;
1595         struct cdrom_device_info *cdi = &cd->devinfo;
1596         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1597         mechtype_t mechtype;
1598         int nslots = 1;
1599
1600         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1601                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1602                      CDC_MO_DRIVE | CDC_RAM);
1603
1604         if (drive->media == ide_optical) {
1605                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1606                 printk(KERN_ERR "%s: ATAPI magneto-optical drive\n",
1607                                 drive->name);
1608                 return nslots;
1609         }
1610
1611         if (cd->cd_flags & IDE_CD_FLAG_PRE_ATAPI12) {
1612                 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
1613                 cdi->mask &= ~CDC_PLAY_AUDIO;
1614                 return nslots;
1615         }
1616
1617         /*
1618          * We have to cheat a little here. the packet will eventually be queued
1619          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1620          * Since this device hasn't been registered with the Uniform layer yet,
1621          * it can't do this. Same goes for cdi->ops.
1622          */
1623         cdi->handle = drive;
1624         cdi->ops = &ide_cdrom_dops;
1625
1626         if (ide_cdrom_get_capabilities(drive, buf))
1627                 return 0;
1628
1629         if ((buf[8 + 6] & 0x01) == 0)
1630                 cd->cd_flags |= IDE_CD_FLAG_NO_DOORLOCK;
1631         if (buf[8 + 6] & 0x08)
1632                 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
1633         if (buf[8 + 3] & 0x01)
1634                 cdi->mask &= ~CDC_CD_R;
1635         if (buf[8 + 3] & 0x02)
1636                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1637         if (buf[8 + 2] & 0x38)
1638                 cdi->mask &= ~CDC_DVD;
1639         if (buf[8 + 3] & 0x20)
1640                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1641         if (buf[8 + 3] & 0x10)
1642                 cdi->mask &= ~CDC_DVD_R;
1643         if ((buf[8 + 4] & 0x01) || (cd->cd_flags & IDE_CD_FLAG_PLAY_AUDIO_OK))
1644                 cdi->mask &= ~CDC_PLAY_AUDIO;
1645
1646         mechtype = buf[8 + 6] >> 5;
1647         if (mechtype == mechtype_caddy || mechtype == mechtype_popup)
1648                 cdi->mask |= CDC_CLOSE_TRAY;
1649
1650         if (cdi->sanyo_slot > 0) {
1651                 cdi->mask &= ~CDC_SELECT_DISC;
1652                 nslots = 3;
1653         } else if (mechtype == mechtype_individual_changer ||
1654                    mechtype == mechtype_cartridge_changer) {
1655                 nslots = cdrom_number_of_slots(cdi);
1656                 if (nslots > 1)
1657                         cdi->mask &= ~CDC_SELECT_DISC;
1658         }
1659
1660         ide_cdrom_update_speed(drive, buf);
1661
1662         printk(KERN_INFO "%s: ATAPI", drive->name);
1663
1664         /* don't print speed if the drive reported 0 */
1665         if (cd->max_speed)
1666                 printk(KERN_CONT " %dX", cd->max_speed);
1667
1668         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1669
1670         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1671                 printk(KERN_CONT " DVD%s%s",
1672                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1673                                  (cdi->mask & CDC_DVD_RAM) ? "" : "-RAM");
1674
1675         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1676                 printk(KERN_CONT " CD%s%s",
1677                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1678                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1679
1680         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1681                 printk(KERN_CONT " changer w/%d slots", nslots);
1682         else
1683                 printk(KERN_CONT " drive");
1684
1685         printk(KERN_CONT ", %dkB Cache\n", be16_to_cpu(*(u16 *)&buf[8 + 12]));
1686
1687         return nslots;
1688 }
1689
1690 /* standard prep_rq_fn that builds 10 byte cmds */
1691 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1692 {
1693         int hard_sect = queue_hardsect_size(q);
1694         long block = (long)rq->hard_sector / (hard_sect >> 9);
1695         unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1696
1697         memset(rq->cmd, 0, BLK_MAX_CDB);
1698
1699         if (rq_data_dir(rq) == READ)
1700                 rq->cmd[0] = GPCMD_READ_10;
1701         else
1702                 rq->cmd[0] = GPCMD_WRITE_10;
1703
1704         /*
1705          * fill in lba
1706          */
1707         rq->cmd[2] = (block >> 24) & 0xff;
1708         rq->cmd[3] = (block >> 16) & 0xff;
1709         rq->cmd[4] = (block >>  8) & 0xff;
1710         rq->cmd[5] = block & 0xff;
1711
1712         /*
1713          * and transfer length
1714          */
1715         rq->cmd[7] = (blocks >> 8) & 0xff;
1716         rq->cmd[8] = blocks & 0xff;
1717         rq->cmd_len = 10;
1718         return BLKPREP_OK;
1719 }
1720
1721 /*
1722  * Most of the SCSI commands are supported directly by ATAPI devices.
1723  * This transform handles the few exceptions.
1724  */
1725 static int ide_cdrom_prep_pc(struct request *rq)
1726 {
1727         u8 *c = rq->cmd;
1728
1729         /* transform 6-byte read/write commands to the 10-byte version */
1730         if (c[0] == READ_6 || c[0] == WRITE_6) {
1731                 c[8] = c[4];
1732                 c[5] = c[3];
1733                 c[4] = c[2];
1734                 c[3] = c[1] & 0x1f;
1735                 c[2] = 0;
1736                 c[1] &= 0xe0;
1737                 c[0] += (READ_10 - READ_6);
1738                 rq->cmd_len = 10;
1739                 return BLKPREP_OK;
1740         }
1741
1742         /*
1743          * it's silly to pretend we understand 6-byte sense commands, just
1744          * reject with ILLEGAL_REQUEST and the caller should take the
1745          * appropriate action
1746          */
1747         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1748                 rq->errors = ILLEGAL_REQUEST;
1749                 return BLKPREP_KILL;
1750         }
1751
1752         return BLKPREP_OK;
1753 }
1754
1755 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1756 {
1757         if (blk_fs_request(rq))
1758                 return ide_cdrom_prep_fs(q, rq);
1759         else if (blk_pc_request(rq))
1760                 return ide_cdrom_prep_pc(rq);
1761
1762         return 0;
1763 }
1764
1765 struct cd_list_entry {
1766         const char      *id_model;
1767         const char      *id_firmware;
1768         unsigned int    cd_flags;
1769 };
1770
1771 #ifdef CONFIG_IDE_PROC_FS
1772 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1773 {
1774         unsigned long capacity, sectors_per_frame;
1775
1776         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1777                 return 0;
1778
1779         return capacity * sectors_per_frame;
1780 }
1781
1782 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1783                                         int count, int *eof, void *data)
1784 {
1785         ide_drive_t *drive = data;
1786         int len;
1787
1788         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1789         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1790 }
1791
1792 static ide_proc_entry_t idecd_proc[] = {
1793         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1794         { NULL, 0, NULL, NULL }
1795 };
1796
1797 static void ide_cdrom_add_settings(ide_drive_t *drive)
1798 {
1799         ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1,
1800                         &drive->dsc_overlap, NULL);
1801 }
1802 #else
1803 static inline void ide_cdrom_add_settings(ide_drive_t *drive) { ; }
1804 #endif
1805
1806 static const struct cd_list_entry ide_cd_quirks_list[] = {
1807         /* Limit transfer size per interrupt. */
1808         { "SAMSUNG CD-ROM SCR-2430", NULL,   IDE_CD_FLAG_LIMIT_NFRAMES      },
1809         { "SAMSUNG CD-ROM SCR-2432", NULL,   IDE_CD_FLAG_LIMIT_NFRAMES      },
1810         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1811         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_CD_FLAG_NO_SPEED_SELECT    },
1812         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1813         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_CD_FLAG_TOCADDR_AS_BCD |
1814                                              IDE_CD_FLAG_PRE_ATAPI12,       },
1815         /* Vertos 300, some versions of this drive like to talk BCD. */
1816         { "V003S0DS",                NULL,   IDE_CD_FLAG_VERTOS_300_SSD,    },
1817         /* Vertos 600 ESD. */
1818         { "V006E0DS",                NULL,   IDE_CD_FLAG_VERTOS_600_ESD,    },
1819         /*
1820          * Sanyo 3 CD changer uses a non-standard command for CD changing
1821          * (by default standard ATAPI support for CD changers is used).
1822          */
1823         { "CD-ROM CDR-C3 G",         NULL,   IDE_CD_FLAG_SANYO_3CD          },
1824         { "CD-ROM CDR-C3G",          NULL,   IDE_CD_FLAG_SANYO_3CD          },
1825         { "CD-ROM CDR_C36",          NULL,   IDE_CD_FLAG_SANYO_3CD          },
1826         /* Stingray 8X CD-ROM. */
1827         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_CD_FLAG_PRE_ATAPI12},
1828         /*
1829          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1830          * mode sense page capabilities size, but older drives break.
1831          */
1832         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_CD_FLAG_FULL_CAPS_PAGE  },
1833         { "WPI CDS-32X",                NULL,   IDE_CD_FLAG_FULL_CAPS_PAGE  },
1834         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1835         { "",                        "241N", IDE_CD_FLAG_LE_SPEED_FIELDS    },
1836         /*
1837          * Some drives used by Apple don't advertise audio play
1838          * but they do support reading TOC & audio datas.
1839          */
1840         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1841         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1842         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1843         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1844         { "Optiarc DVD RW AD-5200A", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1845         { NULL, NULL, 0 }
1846 };
1847
1848 static unsigned int ide_cd_flags(struct hd_driveid *id)
1849 {
1850         const struct cd_list_entry *cle = ide_cd_quirks_list;
1851
1852         while (cle->id_model) {
1853                 if (strcmp(cle->id_model, id->model) == 0 &&
1854                     (cle->id_firmware == NULL ||
1855                      strstr(id->fw_rev, cle->id_firmware)))
1856                         return cle->cd_flags;
1857                 cle++;
1858         }
1859
1860         return 0;
1861 }
1862
1863 static int ide_cdrom_setup(ide_drive_t *drive)
1864 {
1865         struct cdrom_info *cd = drive->driver_data;
1866         struct cdrom_device_info *cdi = &cd->devinfo;
1867         struct hd_driveid *id = drive->id;
1868         int nslots;
1869
1870         blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1871         blk_queue_dma_alignment(drive->queue, 31);
1872         drive->queue->unplug_delay = (1 * HZ) / 1000;
1873         if (!drive->queue->unplug_delay)
1874                 drive->queue->unplug_delay = 1;
1875
1876         drive->special.all      = 0;
1877
1878         cd->cd_flags = IDE_CD_FLAG_MEDIA_CHANGED | IDE_CD_FLAG_NO_EJECT |
1879                        ide_cd_flags(id);
1880
1881         if ((id->config & 0x0060) == 0x20)
1882                 cd->cd_flags |= IDE_CD_FLAG_DRQ_INTERRUPT;
1883
1884         if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_300_SSD) &&
1885             id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1886                 cd->cd_flags |= (IDE_CD_FLAG_TOCTRACKS_AS_BCD |
1887                                  IDE_CD_FLAG_TOCADDR_AS_BCD);
1888         else if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_600_ESD) &&
1889                  id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1890                 cd->cd_flags |= IDE_CD_FLAG_TOCTRACKS_AS_BCD;
1891         else if (cd->cd_flags & IDE_CD_FLAG_SANYO_3CD)
1892                 /* 3 => use CD in slot 0 */
1893                 cdi->sanyo_slot = 3;
1894
1895         nslots = ide_cdrom_probe_capabilities(drive);
1896
1897         /* set correct block size */
1898         blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1899
1900         drive->dsc_overlap = (drive->next != drive);
1901
1902         if (ide_cdrom_register(drive, nslots)) {
1903                 printk(KERN_ERR "%s: %s failed to register device with the"
1904                                 " cdrom driver.\n", drive->name, __func__);
1905                 cd->devinfo.handle = NULL;
1906                 return 1;
1907         }
1908         ide_cdrom_add_settings(drive);
1909         return 0;
1910 }
1911
1912 static void ide_cd_remove(ide_drive_t *drive)
1913 {
1914         struct cdrom_info *info = drive->driver_data;
1915
1916         ide_proc_unregister_driver(drive, info->driver);
1917
1918         del_gendisk(info->disk);
1919
1920         ide_cd_put(info);
1921 }
1922
1923 static void ide_cd_release(struct kref *kref)
1924 {
1925         struct cdrom_info *info = to_ide_cd(kref);
1926         struct cdrom_device_info *devinfo = &info->devinfo;
1927         ide_drive_t *drive = info->drive;
1928         struct gendisk *g = info->disk;
1929
1930         kfree(info->toc);
1931         if (devinfo->handle == drive)
1932                 unregister_cdrom(devinfo);
1933         drive->dsc_overlap = 0;
1934         drive->driver_data = NULL;
1935         blk_queue_prep_rq(drive->queue, NULL);
1936         g->private_data = NULL;
1937         put_disk(g);
1938         kfree(info);
1939 }
1940
1941 static int ide_cd_probe(ide_drive_t *);
1942
1943 static ide_driver_t ide_cdrom_driver = {
1944         .gen_driver = {
1945                 .owner          = THIS_MODULE,
1946                 .name           = "ide-cdrom",
1947                 .bus            = &ide_bus_type,
1948         },
1949         .probe                  = ide_cd_probe,
1950         .remove                 = ide_cd_remove,
1951         .version                = IDECD_VERSION,
1952         .media                  = ide_cdrom,
1953         .supports_dsc_overlap   = 1,
1954         .do_request             = ide_do_rw_cdrom,
1955         .end_request            = ide_end_request,
1956         .error                  = __ide_error,
1957         .abort                  = __ide_abort,
1958 #ifdef CONFIG_IDE_PROC_FS
1959         .proc                   = idecd_proc,
1960 #endif
1961 };
1962
1963 static int idecd_open(struct inode *inode, struct file *file)
1964 {
1965         struct gendisk *disk = inode->i_bdev->bd_disk;
1966         struct cdrom_info *info;
1967         int rc = -ENOMEM;
1968
1969         info = ide_cd_get(disk);
1970         if (!info)
1971                 return -ENXIO;
1972
1973         rc = cdrom_open(&info->devinfo, inode, file);
1974
1975         if (rc < 0)
1976                 ide_cd_put(info);
1977
1978         return rc;
1979 }
1980
1981 static int idecd_release(struct inode *inode, struct file *file)
1982 {
1983         struct gendisk *disk = inode->i_bdev->bd_disk;
1984         struct cdrom_info *info = ide_cd_g(disk);
1985
1986         cdrom_release(&info->devinfo, file);
1987
1988         ide_cd_put(info);
1989
1990         return 0;
1991 }
1992
1993 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1994 {
1995         struct packet_command cgc;
1996         char buffer[16];
1997         int stat;
1998         char spindown;
1999
2000         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
2001                 return -EFAULT;
2002
2003         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2004
2005         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2006         if (stat)
2007                 return stat;
2008
2009         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
2010         return cdrom_mode_select(cdi, &cgc);
2011 }
2012
2013 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2014 {
2015         struct packet_command cgc;
2016         char buffer[16];
2017         int stat;
2018         char spindown;
2019
2020         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2021
2022         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2023         if (stat)
2024                 return stat;
2025
2026         spindown = buffer[11] & 0x0f;
2027         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
2028                 return -EFAULT;
2029         return 0;
2030 }
2031
2032 static int idecd_ioctl(struct inode *inode, struct file *file,
2033                         unsigned int cmd, unsigned long arg)
2034 {
2035         struct block_device *bdev = inode->i_bdev;
2036         struct cdrom_info *info = ide_cd_g(bdev->bd_disk);
2037         int err;
2038
2039         switch (cmd) {
2040         case CDROMSETSPINDOWN:
2041                 return idecd_set_spindown(&info->devinfo, arg);
2042         case CDROMGETSPINDOWN:
2043                 return idecd_get_spindown(&info->devinfo, arg);
2044         default:
2045                 break;
2046         }
2047
2048         err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg);
2049         if (err == -EINVAL)
2050                 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg);
2051
2052         return err;
2053 }
2054
2055 static int idecd_media_changed(struct gendisk *disk)
2056 {
2057         struct cdrom_info *info = ide_cd_g(disk);
2058         return cdrom_media_changed(&info->devinfo);
2059 }
2060
2061 static int idecd_revalidate_disk(struct gendisk *disk)
2062 {
2063         struct cdrom_info *info = ide_cd_g(disk);
2064         struct request_sense sense;
2065
2066         ide_cd_read_toc(info->drive, &sense);
2067
2068         return  0;
2069 }
2070
2071 static struct block_device_operations idecd_ops = {
2072         .owner                  = THIS_MODULE,
2073         .open                   = idecd_open,
2074         .release                = idecd_release,
2075         .ioctl                  = idecd_ioctl,
2076         .media_changed          = idecd_media_changed,
2077         .revalidate_disk        = idecd_revalidate_disk
2078 };
2079
2080 /* module options */
2081 static char *ignore;
2082
2083 module_param(ignore, charp, 0400);
2084 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2085
2086 static int ide_cd_probe(ide_drive_t *drive)
2087 {
2088         struct cdrom_info *info;
2089         struct gendisk *g;
2090         struct request_sense sense;
2091
2092         if (!strstr("ide-cdrom", drive->driver_req))
2093                 goto failed;
2094         if (!drive->present)
2095                 goto failed;
2096         if (drive->media != ide_cdrom && drive->media != ide_optical)
2097                 goto failed;
2098         /* skip drives that we were told to ignore */
2099         if (ignore != NULL) {
2100                 if (strstr(ignore, drive->name)) {
2101                         printk(KERN_INFO "ide-cd: ignoring drive %s\n",
2102                                          drive->name);
2103                         goto failed;
2104                 }
2105         }
2106         if (drive->scsi) {
2107                 printk(KERN_INFO "ide-cd: passing drive %s to ide-scsi "
2108                                  "emulation.\n", drive->name);
2109                 goto failed;
2110         }
2111         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2112         if (info == NULL) {
2113                 printk(KERN_ERR "%s: Can't allocate a cdrom structure\n",
2114                                 drive->name);
2115                 goto failed;
2116         }
2117
2118         g = alloc_disk(1 << PARTN_BITS);
2119         if (!g)
2120                 goto out_free_cd;
2121
2122         ide_init_disk(g, drive);
2123
2124         ide_proc_register_driver(drive, &ide_cdrom_driver);
2125
2126         kref_init(&info->kref);
2127
2128         info->drive = drive;
2129         info->driver = &ide_cdrom_driver;
2130         info->disk = g;
2131
2132         g->private_data = &info->driver;
2133
2134         drive->driver_data = info;
2135
2136         g->minors = 1;
2137         g->driverfs_dev = &drive->gendev;
2138         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2139         if (ide_cdrom_setup(drive)) {
2140                 ide_proc_unregister_driver(drive, &ide_cdrom_driver);
2141                 ide_cd_release(&info->kref);
2142                 goto failed;
2143         }
2144
2145         ide_cd_read_toc(drive, &sense);
2146         g->fops = &idecd_ops;
2147         g->flags |= GENHD_FL_REMOVABLE;
2148         add_disk(g);
2149         return 0;
2150
2151 out_free_cd:
2152         kfree(info);
2153 failed:
2154         return -ENODEV;
2155 }
2156
2157 static void __exit ide_cdrom_exit(void)
2158 {
2159         driver_unregister(&ide_cdrom_driver.gen_driver);
2160 }
2161
2162 static int __init ide_cdrom_init(void)
2163 {
2164         return driver_register(&ide_cdrom_driver.gen_driver);
2165 }
2166
2167 MODULE_ALIAS("ide:*m-cdrom*");
2168 MODULE_ALIAS("ide-cd");
2169 module_init(ide_cdrom_init);
2170 module_exit(ide_cdrom_exit);
2171 MODULE_LICENSE("GPL");