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 DRV_NAME "ide-cd"
  27 #define PFX DRV_NAME ": "
  28
  29 #define IDECD_VERSION "5.00"
  30
  31 #include <linux/module.h>
  32 #include <linux/types.h>
  33 #include <linux/kernel.h>
  34 #include <linux/delay.h>
  35 #include <linux/timer.h>
  36 #include <linux/slab.h>
  37 #include <linux/interrupt.h>
  38 #include <linux/errno.h>
  39 #include <linux/cdrom.h>
  40 #include <linux/ide.h>
  41 #include <linux/completion.h>
  42 #include <linux/mutex.h>
  43 #include <linux/bcd.h>
  44
  45 /* For SCSI -> ATAPI command conversion */
  46 #include <scsi/scsi.h>
  47
  48 #include <linux/irq.h>
  49 #include <linux/io.h>
  50 #include <asm/byteorder.h>
  51 #include <linux/uaccess.h>
  52 #include <asm/unaligned.h>
  53
  54 #include "ide-cd.h"
  55
  56 static DEFINE_MUTEX(idecd_ref_mutex);
  57
  58 static void ide_cd_release(struct kref *);
  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_drv_g(disk, cdrom_info);
  66         if (cd) {
  67                 if (ide_device_get(cd->drive))
  68                         cd = NULL;
  69                 else
  70                         kref_get(&cd->kref);
  71
  72         }
  73         mutex_unlock(&idecd_ref_mutex);
  74         return cd;
  75 }
  76
  77 static void ide_cd_put(struct cdrom_info *cd)
  78 {
  79         ide_drive_t *drive = cd->drive;
  80
  81         mutex_lock(&idecd_ref_mutex);
  82         kref_put(&cd->kref, ide_cd_release);
  83         ide_device_put(drive);
  84         mutex_unlock(&idecd_ref_mutex);
  85 }
  86
  87 /*
  88  * Generic packet command support and error handling routines.
  89  */
  90
  91 /* Mark that we've seen a media change and invalidate our internal buffers. */
  92 static void cdrom_saw_media_change(ide_drive_t *drive)
  93 {
  94         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
  95         drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
  96 }
  97
  98 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
  99                            struct request_sense *sense)
 100 {
 101         int log = 0;
 102
 103         ide_debug_log(IDE_DBG_SENSE, "Call %s, sense_key: 0x%x\n", __func__,
 104                       sense->sense_key);
 105
 106         if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
 107                 return 0;
 108
 109         switch (sense->sense_key) {
 110         case NO_SENSE:
 111         case RECOVERED_ERROR:
 112                 break;
 113         case NOT_READY:
 114                 /*
 115                  * don't care about tray state messages for e.g. capacity
 116                  * commands or in-progress or becoming ready
 117                  */
 118                 if (sense->asc == 0x3a || sense->asc == 0x04)
 119                         break;
 120                 log = 1;
 121                 break;
 122         case ILLEGAL_REQUEST:
 123                 /*
 124                  * don't log START_STOP unit with LoEj set, since we cannot
 125                  * reliably check if drive can auto-close
 126                  */
 127                 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
 128                         break;
 129                 log = 1;
 130                 break;
 131         case UNIT_ATTENTION:
 132                 /*
 133                  * Make good and sure we've seen this potential media change.
 134                  * Some drives (i.e. Creative) fail to present the correct sense
 135                  * key in the error register.
 136                  */
 137                 cdrom_saw_media_change(drive);
 138                 break;
 139         default:
 140                 log = 1;
 141                 break;
 142         }
 143         return log;
 144 }
 145
 146 static void cdrom_analyze_sense_data(ide_drive_t *drive,
 147                               struct request *failed_command,
 148                               struct request_sense *sense)
 149 {
 150         unsigned long sector;
 151         unsigned long bio_sectors;
 152         struct cdrom_info *info = drive->driver_data;
 153
 154         ide_debug_log(IDE_DBG_SENSE, "Call %s, error_code: 0x%x, "
 155                         "sense_key: 0x%x\n", __func__, sense->error_code,
 156                         sense->sense_key);
 157
 158         if (failed_command)
 159                 ide_debug_log(IDE_DBG_SENSE, "%s: failed cmd: 0x%x\n",
 160                                 __func__, failed_command->cmd[0]);
 161
 162         if (!cdrom_log_sense(drive, failed_command, sense))
 163                 return;
 164
 165         /*
 166          * If a read toc is executed for a CD-R or CD-RW medium where the first
 167          * toc has not been recorded yet, it will fail with 05/24/00 (which is a
 168          * confusing error)
 169          */
 170         if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
 171                 if (sense->sense_key == 0x05 && sense->asc == 0x24)
 172                         return;
 173
 174         /* current error */
 175         if (sense->error_code == 0x70) {
 176                 switch (sense->sense_key) {
 177                 case MEDIUM_ERROR:
 178                 case VOLUME_OVERFLOW:
 179                 case ILLEGAL_REQUEST:
 180                         if (!sense->valid)
 181                                 break;
 182                         if (failed_command == NULL ||
 183                                         !blk_fs_request(failed_command))
 184                                 break;
 185                         sector = (sense->information[0] << 24) |
 186                                  (sense->information[1] << 16) |
 187                                  (sense->information[2] <<  8) |
 188                                  (sense->information[3]);
 189
 190                         if (drive->queue->hardsect_size == 2048)
 191                                 /* device sector size is 2K */
 192                                 sector <<= 2;
 193
 194                         bio_sectors = max(bio_sectors(failed_command->bio), 4U);
 195                         sector &= ~(bio_sectors - 1);
 196
 197                         if (sector < get_capacity(info->disk) &&
 198                             drive->probed_capacity - sector < 4 * 75)
 199                                 set_capacity(info->disk, sector);
 200                 }
 201         }
 202
 203         ide_cd_log_error(drive->name, failed_command, sense);
 204 }
 205
 206 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
 207                                       struct request *failed_command)
 208 {
 209         struct cdrom_info *info         = drive->driver_data;
 210         struct request *rq              = &info->request_sense_request;
 211
 212         ide_debug_log(IDE_DBG_SENSE, "Call %s\n", __func__);
 213
 214         if (sense == NULL)
 215                 sense = &info->sense_data;
 216
 217         /* stuff the sense request in front of our current request */
 218         blk_rq_init(NULL, rq);
 219         rq->cmd_type = REQ_TYPE_ATA_PC;
 220         rq->rq_disk = info->disk;
 221
 222         rq->data = sense;
 223         rq->cmd[0] = GPCMD_REQUEST_SENSE;
 224         rq->cmd[4] = 18;
 225         rq->data_len = 18;
 226
 227         rq->cmd_type = REQ_TYPE_SENSE;
 228         rq->cmd_flags |= REQ_PREEMPT;
 229
 230         /* NOTE! Save the failed command in "rq->buffer" */
 231         rq->buffer = (void *) failed_command;
 232
 233         if (failed_command)
 234                 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x\n",
 235                               failed_command->cmd[0]);
 236
 237         ide_do_drive_cmd(drive, rq);
 238 }
 239
 240 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
 241 {
 242         struct request *rq = HWGROUP(drive)->rq;
 243         int nsectors = rq->hard_cur_sectors;
 244
 245         ide_debug_log(IDE_DBG_FUNC, "Call %s, cmd: 0x%x, uptodate: 0x%x, "
 246                       "nsectors: %d\n", __func__, rq->cmd[0], uptodate,
 247                       nsectors);
 248
 249         if (blk_sense_request(rq) && uptodate) {
 250                 /*
 251                  * For REQ_TYPE_SENSE, "rq->buffer" points to the original
 252                  * failed request
 253                  */
 254                 struct request *failed = (struct request *) rq->buffer;
 255                 struct cdrom_info *info = drive->driver_data;
 256                 void *sense = &info->sense_data;
 257
 258                 if (failed) {
 259                         if (failed->sense) {
 260                                 sense = failed->sense;
 261                                 failed->sense_len = rq->sense_len;
 262                         }
 263                         cdrom_analyze_sense_data(drive, failed, sense);
 264                         /*
 265                          * now end the failed request
 266                          */
 267                         if (blk_fs_request(failed)) {
 268                                 if (ide_end_dequeued_request(drive, failed, 0,
 269                                                 failed->hard_nr_sectors))
 270                                         BUG();
 271                         } else {
 272                                 if (blk_end_request(failed, -EIO,
 273                                                     failed->data_len))
 274                                         BUG();
 275                         }
 276                 } else
 277                         cdrom_analyze_sense_data(drive, NULL, sense);
 278         }
 279
 280         if (!rq->current_nr_sectors && blk_fs_request(rq))
 281                 uptodate = 1;
 282         /* make sure it's fully ended */
 283         if (blk_pc_request(rq))
 284                 nsectors = (rq->data_len + 511) >> 9;
 285         if (!nsectors)
 286                 nsectors = 1;
 287
 288         ide_debug_log(IDE_DBG_FUNC, "Exit %s, uptodate: 0x%x, nsectors: %d\n",
 289                       __func__, uptodate, nsectors);
 290
 291         ide_end_request(drive, uptodate, nsectors);
 292 }
 293
 294 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
 295 {
 296         if (st & 0x80)
 297                 return;
 298         ide_dump_status(drive, msg, st);
 299 }
 300
 301 /*
 302  * Returns:
 303  * 0: if the request should be continued.
 304  * 1: if the request was ended.
 305  */
 306 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
 307 {
 308         ide_hwif_t *hwif = drive->hwif;
 309         ide_hwgroup_t *hwgroup = hwif->hwgroup;
 310         struct request *rq = hwgroup->rq;
 311         int stat, err, sense_key;
 312
 313         /* check for errors */
 314         stat = hwif->tp_ops->read_status(hwif);
 315
 316         if (stat_ret)
 317                 *stat_ret = stat;
 318
 319         if (OK_STAT(stat, good_stat, BAD_R_STAT))
 320                 return 0;
 321
 322         /* get the IDE error register */
 323         err = ide_read_error(drive);
 324         sense_key = err >> 4;
 325
 326         if (rq == NULL) {
 327                 printk(KERN_ERR PFX "%s: missing rq in %s\n",
 328                                 drive->name, __func__);
 329                 return 1;
 330         }
 331
 332         ide_debug_log(IDE_DBG_RQ, "%s: stat: 0x%x, good_stat: 0x%x, "
 333                       "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x, err: 0x%x\n",
 334                       __func__, stat, good_stat, rq->cmd[0], rq->cmd_type, err);
 335
 336         if (blk_sense_request(rq)) {
 337                 /*
 338                  * We got an error trying to get sense info from the drive
 339                  * (probably while trying to recover from a former error).
 340                  * Just give up.
 341                  */
 342                 rq->cmd_flags |= REQ_FAILED;
 343                 cdrom_end_request(drive, 0);
 344                 ide_error(drive, "request sense failure", stat);
 345                 return 1;
 346
 347         } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
 348                 /* All other functions, except for READ. */
 349
 350                 /*
 351                  * if we have an error, pass back CHECK_CONDITION as the
 352                  * scsi status byte
 353                  */
 354                 if (blk_pc_request(rq) && !rq->errors)
 355                         rq->errors = SAM_STAT_CHECK_CONDITION;
 356
 357                 /* check for tray open */
 358                 if (sense_key == NOT_READY) {
 359                         cdrom_saw_media_change(drive);
 360                 } else if (sense_key == UNIT_ATTENTION) {
 361                         /* check for media change */
 362                         cdrom_saw_media_change(drive);
 363                         return 0;
 364                 } else if (sense_key == ILLEGAL_REQUEST &&
 365                            rq->cmd[0] == GPCMD_START_STOP_UNIT) {
 366                         /*
 367                          * Don't print error message for this condition--
 368                          * SFF8090i indicates that 5/24/00 is the correct
 369                          * response to a request to close the tray if the
 370                          * drive doesn't have that capability.
 371                          * cdrom_log_sense() knows this!
 372                          */
 373                 } else if (!(rq->cmd_flags & REQ_QUIET)) {
 374                         /* otherwise, print an error */
 375                         ide_dump_status(drive, "packet command error", stat);
 376                 }
 377
 378                 rq->cmd_flags |= REQ_FAILED;
 379
 380                 /*
 381                  * instead of playing games with moving completions around,
 382                  * remove failed request completely and end it when the
 383                  * request sense has completed
 384                  */
 385                 goto end_request;
 386
 387         } else if (blk_fs_request(rq)) {
 388                 int do_end_request = 0;
 389
 390                 /* handle errors from READ and WRITE requests */
 391
 392                 if (blk_noretry_request(rq))
 393                         do_end_request = 1;
 394
 395                 if (sense_key == NOT_READY) {
 396                         /* tray open */
 397                         if (rq_data_dir(rq) == READ) {
 398                                 cdrom_saw_media_change(drive);
 399
 400                                 /* fail the request */
 401                                 printk(KERN_ERR PFX "%s: tray open\n",
 402                                                 drive->name);
 403                                 do_end_request = 1;
 404                         } else {
 405                                 struct cdrom_info *info = drive->driver_data;
 406
 407                                 /*
 408                                  * Allow the drive 5 seconds to recover, some
 409                                  * devices will return this error while flushing
 410                                  * data from cache.
 411                                  */
 412                                 if (!rq->errors)
 413                                         info->write_timeout = jiffies +
 414                                                         ATAPI_WAIT_WRITE_BUSY;
 415                                 rq->errors = 1;
 416                                 if (time_after(jiffies, info->write_timeout))
 417                                         do_end_request = 1;
 418                                 else {
 419                                         struct request_queue *q = drive->queue;
 420                                         unsigned long flags;
 421
 422                                         /*
 423                                          * take a breather relying on the unplug
 424                                          * timer to kick us again
 425                                          */
 426                                         spin_lock_irqsave(q->queue_lock, flags);
 427                                         blk_plug_device(q);
 428                                         spin_unlock_irqrestore(q->queue_lock, flags);
 429
 430                                         return 1;
 431                                 }
 432                         }
 433                 } else if (sense_key == UNIT_ATTENTION) {
 434                         /* media change */
 435                         cdrom_saw_media_change(drive);
 436
 437                         /*
 438                          * Arrange to retry the request but be sure to give up
 439                          * if we've retried too many times.
 440                          */
 441                         if (++rq->errors > ERROR_MAX)
 442                                 do_end_request = 1;
 443                 } else if (sense_key == ILLEGAL_REQUEST ||
 444                            sense_key == DATA_PROTECT) {
 445                         /*
 446                          * No point in retrying after an illegal request or data
 447                          * protect error.
 448                          */
 449                         ide_dump_status_no_sense(drive, "command error", stat);
 450                         do_end_request = 1;
 451                 } else if (sense_key == MEDIUM_ERROR) {
 452                         /*
 453                          * No point in re-trying a zillion times on a bad
 454                          * sector. If we got here the error is not correctable.
 455                          */
 456                         ide_dump_status_no_sense(drive,
 457                                                  "media error (bad sector)",
 458                                                  stat);
 459                         do_end_request = 1;
 460                 } else if (sense_key == BLANK_CHECK) {
 461                         /* disk appears blank ?? */
 462                         ide_dump_status_no_sense(drive, "media error (blank)",
 463                                                  stat);
 464                         do_end_request = 1;
 465                 } else if ((err & ~ATA_ABORTED) != 0) {
 466                         /* go to the default handler for other errors */
 467                         ide_error(drive, "cdrom_decode_status", stat);
 468                         return 1;
 469                 } else if ((++rq->errors > ERROR_MAX)) {
 470                         /* we've racked up too many retries, abort */
 471                         do_end_request = 1;
 472                 }
 473
 474                 /*
 475                  * End a request through request sense analysis when we have
 476                  * sense data. We need this in order to perform end of media
 477                  * processing.
 478                  */
 479                 if (do_end_request)
 480                         goto end_request;
 481
 482                 /*
 483                  * If we got a CHECK_CONDITION status, queue
 484                  * a request sense command.
 485                  */
 486                 if (stat & ATA_ERR)
 487                         cdrom_queue_request_sense(drive, NULL, NULL);
 488         } else {
 489                 blk_dump_rq_flags(rq, PFX "bad rq");
 490                 cdrom_end_request(drive, 0);
 491         }
 492
 493         /* retry, or handle the next request */
 494         return 1;
 495
 496 end_request:
 497         if (stat & ATA_ERR) {
 498                 struct request_queue *q = drive->queue;
 499                 unsigned long flags;
 500
 501                 spin_lock_irqsave(q->queue_lock, flags);
 502                 blkdev_dequeue_request(rq);
 503                 spin_unlock_irqrestore(q->queue_lock, flags);
 504
 505                 hwgroup->rq = NULL;
 506
 507                 cdrom_queue_request_sense(drive, rq->sense, rq);
 508         } else
 509                 cdrom_end_request(drive, 0);
 510
 511         return 1;
 512 }
 513
 514 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *);
 515 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
 516
 517 /*
 518  * Set up the device registers for transferring a packet command on DEV,
 519  * expecting to later transfer XFERLEN bytes.  HANDLER is the routine
 520  * which actually transfers the command to the drive.  If this is a
 521  * drq_interrupt device, this routine will arrange for HANDLER to be
 522  * called when the interrupt from the drive arrives.  Otherwise, HANDLER
 523  * will be called immediately after the drive is prepared for the transfer.
 524  */
 525 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive)
 526 {
 527         ide_hwif_t *hwif = drive->hwif;
 528         struct request *rq = hwif->hwgroup->rq;
 529         int xferlen;
 530
 531         xferlen = ide_cd_get_xferlen(rq);
 532
 533         ide_debug_log(IDE_DBG_PC, "Call %s, xferlen: %d\n", __func__, xferlen);
 534
 535         /* FIXME: for Virtual DMA we must check harder */
 536         if (drive->dma)
 537                 drive->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                            xferlen, drive->dma);
 542
 543         if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
 544                 /* waiting for CDB interrupt, not DMA yet. */
 545                 if (drive->dma)
 546                         drive->waiting_for_dma = 0;
 547
 548                 /* packet command */
 549                 ide_execute_command(drive, ATA_CMD_PACKET,
 550                                     cdrom_transfer_packet_command,
 551                                     ATAPI_WAIT_PC, ide_cd_expiry);
 552                 return ide_started;
 553         } else {
 554                 ide_execute_pkt_cmd(drive);
 555
 556                 return cdrom_transfer_packet_command(drive);
 557         }
 558 }
 559
 560 /*
 561  * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
 562  * registers must have already been prepared by cdrom_start_packet_command.
 563  * HANDLER is the interrupt handler to call when the command completes or
 564  * there's data ready.
 565  */
 566 #define ATAPI_MIN_CDB_BYTES 12
 567 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive)
 568 {
 569         ide_hwif_t *hwif = drive->hwif;
 570         struct request *rq = hwif->hwgroup->rq;
 571         int cmd_len;
 572         ide_startstop_t startstop;
 573
 574         ide_debug_log(IDE_DBG_PC, "Call %s\n", __func__);
 575
 576         if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
 577                 /*
 578                  * Here we should have been called after receiving an interrupt
 579                  * from the device.  DRQ should how be set.
 580                  */
 581
 582                 /* check for errors */
 583                 if (cdrom_decode_status(drive, ATA_DRQ, NULL))
 584                         return ide_stopped;
 585
 586                 /* ok, next interrupt will be DMA interrupt */
 587                 if (drive->dma)
 588                         drive->waiting_for_dma = 1;
 589         } else {
 590                 /* otherwise, we must wait for DRQ to get set */
 591                 if (ide_wait_stat(&startstop, drive, ATA_DRQ,
 592                                   ATA_BUSY, WAIT_READY))
 593                         return startstop;
 594         }
 595
 596         /* arm the interrupt handler */
 597         ide_set_handler(drive, cdrom_newpc_intr, rq->timeout, ide_cd_expiry);
 598
 599         /* ATAPI commands get padded out to 12 bytes minimum */
 600         cmd_len = COMMAND_SIZE(rq->cmd[0]);
 601         if (cmd_len < ATAPI_MIN_CDB_BYTES)
 602                 cmd_len = ATAPI_MIN_CDB_BYTES;
 603
 604         /* send the command to the device */
 605         hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
 606
 607         /* start the DMA if need be */
 608         if (drive->dma)
 609                 hwif->dma_ops->dma_start(drive);
 610
 611         return ide_started;
 612 }
 613
 614 /*
 615  * Check the contents of the interrupt reason register from the cdrom
 616  * and attempt to recover if there are problems.  Returns  0 if everything's
 617  * ok; nonzero if the request has been terminated.
 618  */
 619 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
 620                                 int len, int ireason, int rw)
 621 {
 622         ide_hwif_t *hwif = drive->hwif;
 623
 624         ide_debug_log(IDE_DBG_FUNC, "Call %s, ireason: 0x%x, rw: 0x%x\n",
 625                       __func__, ireason, rw);
 626
 627         /*
 628          * ireason == 0: the drive wants to receive data from us
 629          * ireason == 2: the drive is expecting to transfer data to us
 630          */
 631         if (ireason == (!rw << 1))
 632                 return 0;
 633         else if (ireason == (rw << 1)) {
 634
 635                 /* whoops... */
 636                 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
 637                                 drive->name, __func__);
 638
 639                 ide_pad_transfer(drive, rw, len);
 640         } else  if (rw == 0 && ireason == 1) {
 641                 /*
 642                  * Some drives (ASUS) seem to tell us that status info is
 643                  * available.  Just get it and ignore.
 644                  */
 645                 (void)hwif->tp_ops->read_status(hwif);
 646                 return 0;
 647         } else {
 648                 /* drive wants a command packet, or invalid ireason... */
 649                 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
 650                                 drive->name, __func__, ireason);
 651         }
 652
 653         if (rq->cmd_type == REQ_TYPE_ATA_PC)
 654                 rq->cmd_flags |= REQ_FAILED;
 655
 656         cdrom_end_request(drive, 0);
 657         return -1;
 658 }
 659
 660 /*
 661  * Assume that the drive will always provide data in multiples of at least
 662  * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
 663  */
 664 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
 665 {
 666         ide_debug_log(IDE_DBG_FUNC, "Call %s, len: %d\n", __func__, len);
 667
 668         if ((len % SECTOR_SIZE) == 0)
 669                 return 0;
 670
 671         printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
 672                         __func__, len);
 673
 674         if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
 675                 printk(KERN_ERR PFX "This drive is not supported by this "
 676                                 "version of the driver\n");
 677         else {
 678                 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
 679                 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
 680         }
 681
 682         return 1;
 683 }
 684
 685 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
 686                                                  struct request *rq)
 687 {
 688         ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd_flags: 0x%x\n", __func__,
 689                       rq->cmd_flags);
 690
 691         if (rq_data_dir(rq) == READ) {
 692                 unsigned short sectors_per_frame =
 693                         queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 694                 int nskip = rq->sector & (sectors_per_frame - 1);
 695
 696                 /*
 697                  * If the requested sector doesn't start on a frame boundary,
 698                  * we must adjust the start of the transfer so that it does,
 699                  * and remember to skip the first few sectors.
 700                  *
 701                  * If the rq->current_nr_sectors field is larger than the size
 702                  * of the buffer, it will mean that we're to skip a number of
 703                  * sectors equal to the amount by which rq->current_nr_sectors
 704                  * is larger than the buffer size.
 705                  */
 706                 if (nskip > 0) {
 707                         /* sanity check... */
 708                         if (rq->current_nr_sectors !=
 709                             bio_cur_sectors(rq->bio)) {
 710                                 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
 711                                                 drive->name, __func__,
 712                                                 rq->current_nr_sectors);
 713                                 cdrom_end_request(drive, 0);
 714                                 return ide_stopped;
 715                         }
 716                         rq->current_nr_sectors += nskip;
 717                 }
 718         }
 719
 720         /* set up the command */
 721         rq->timeout = ATAPI_WAIT_PC;
 722
 723         return ide_started;
 724 }
 725
 726 /*
 727  * Fix up a possibly partially-processed request so that we can start it over
 728  * entirely, or even put it back on the request queue.
 729  */
 730 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
 731 {
 732
 733         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
 734
 735         if (rq->buffer != bio_data(rq->bio)) {
 736                 sector_t n =
 737                         (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
 738
 739                 rq->buffer = bio_data(rq->bio);
 740                 rq->nr_sectors += n;
 741                 rq->sector -= n;
 742         }
 743         rq->current_nr_sectors = bio_cur_sectors(rq->bio);
 744         rq->hard_cur_sectors = rq->current_nr_sectors;
 745         rq->hard_nr_sectors = rq->nr_sectors;
 746         rq->hard_sector = rq->sector;
 747         rq->q->prep_rq_fn(rq->q, rq);
 748 }
 749
 750 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
 751 {
 752         ide_debug_log(IDE_DBG_FUNC, "Call %s, rq->cmd[0]: 0x%x\n",
 753                       __func__, rq->cmd[0]);
 754
 755         /*
 756          * Some of the trailing request sense fields are optional,
 757          * and some drives don't send them.  Sigh.
 758          */
 759         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 760             rq->data_len > 0 && rq->data_len <= 5)
 761                 while (rq->data_len > 0) {
 762                         *(u8 *)rq->data++ = 0;
 763                         --rq->data_len;
 764                 }
 765 }
 766
 767 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 768                     int write, void *buffer, unsigned *bufflen,
 769                     struct request_sense *sense, int timeout,
 770                     unsigned int cmd_flags)
 771 {
 772         struct cdrom_info *info = drive->driver_data;
 773         struct request_sense local_sense;
 774         int retries = 10;
 775         unsigned int flags = 0;
 776
 777         if (!sense)
 778                 sense = &local_sense;
 779
 780         ide_debug_log(IDE_DBG_PC, "Call %s, cmd[0]: 0x%x, write: 0x%x, "
 781                       "timeout: %d, cmd_flags: 0x%x\n", __func__, cmd[0], write,
 782                       timeout, cmd_flags);
 783
 784         /* start of retry loop */
 785         do {
 786                 struct request *rq;
 787                 int error;
 788
 789                 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
 790
 791                 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
 792                 rq->cmd_type = REQ_TYPE_ATA_PC;
 793                 rq->sense = sense;
 794                 rq->cmd_flags |= cmd_flags;
 795                 rq->timeout = timeout;
 796                 if (buffer) {
 797                         rq->data = buffer;
 798                         rq->data_len = *bufflen;
 799                 }
 800
 801                 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 802
 803                 if (buffer)
 804                         *bufflen = rq->data_len;
 805
 806                 flags = rq->cmd_flags;
 807                 blk_put_request(rq);
 808
 809                 /*
 810                  * FIXME: we should probably abort/retry or something in case of
 811                  * failure.
 812                  */
 813                 if (flags & REQ_FAILED) {
 814                         /*
 815                          * The request failed.  Retry if it was due to a unit
 816                          * attention status (usually means media was changed).
 817                          */
 818                         struct request_sense *reqbuf = sense;
 819
 820                         if (reqbuf->sense_key == UNIT_ATTENTION)
 821                                 cdrom_saw_media_change(drive);
 822                         else if (reqbuf->sense_key == NOT_READY &&
 823                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 824                                 /*
 825                                  * The drive is in the process of loading
 826                                  * a disk.  Retry, but wait a little to give
 827                                  * the drive time to complete the load.
 828                                  */
 829                                 ssleep(2);
 830                         } else {
 831                                 /* otherwise, don't retry */
 832                                 retries = 0;
 833                         }
 834                         --retries;
 835                 }
 836
 837                 /* end of retry loop */
 838         } while ((flags & REQ_FAILED) && retries >= 0);
 839
 840         /* return an error if the command failed */
 841         return (flags & REQ_FAILED) ? -EIO : 0;
 842 }
 843
 844 /*
 845  * Called from blk_end_request_callback() after the data of the request is
 846  * completed and before the request itself is completed. By returning value '1',
 847  * blk_end_request_callback() returns immediately without completing it.
 848  */
 849 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
 850 {
 851         return 1;
 852 }
 853
 854 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 855 {
 856         ide_hwif_t *hwif = drive->hwif;
 857         ide_hwgroup_t *hwgroup = hwif->hwgroup;
 858         struct request *rq = hwgroup->rq;
 859         xfer_func_t *xferfunc;
 860         ide_expiry_t *expiry = NULL;
 861         int dma_error = 0, dma, stat, thislen, uptodate = 0;
 862         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
 863         unsigned int timeout;
 864         u16 len;
 865         u8 ireason;
 866
 867         ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x\n",
 868                       __func__, rq->cmd[0], write);
 869
 870         /* check for errors */
 871         dma = drive->dma;
 872         if (dma) {
 873                 drive->dma = 0;
 874                 dma_error = hwif->dma_ops->dma_end(drive);
 875                 if (dma_error) {
 876                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 877                                         write ? "write" : "read");
 878                         ide_dma_off(drive);
 879                 }
 880         }
 881
 882         if (cdrom_decode_status(drive, 0, &stat))
 883                 return ide_stopped;
 884
 885         /* using dma, transfer is complete now */
 886         if (dma) {
 887                 if (dma_error)
 888                         return ide_error(drive, "dma error", stat);
 889                 if (blk_fs_request(rq)) {
 890                         ide_end_request(drive, 1, rq->nr_sectors);
 891                         return ide_stopped;
 892                 }
 893                 goto end_request;
 894         }
 895
 896         ide_read_bcount_and_ireason(drive, &len, &ireason);
 897
 898         thislen = blk_fs_request(rq) ? len : rq->data_len;
 899         if (thislen > len)
 900                 thislen = len;
 901
 902         ide_debug_log(IDE_DBG_PC, "%s: DRQ: stat: 0x%x, thislen: %d\n",
 903                       __func__, stat, thislen);
 904
 905         /* If DRQ is clear, the command has completed. */
 906         if ((stat & ATA_DRQ) == 0) {
 907                 if (blk_fs_request(rq)) {
 908                         /*
 909                          * If we're not done reading/writing, complain.
 910                          * Otherwise, complete the command normally.
 911                          */
 912                         uptodate = 1;
 913                         if (rq->current_nr_sectors > 0) {
 914                                 printk(KERN_ERR PFX "%s: %s: data underrun "
 915                                                 "(%d blocks)\n",
 916                                                 drive->name, __func__,
 917                                                 rq->current_nr_sectors);
 918                                 if (!write)
 919                                         rq->cmd_flags |= REQ_FAILED;
 920                                 uptodate = 0;
 921                         }
 922                         cdrom_end_request(drive, uptodate);
 923                         return ide_stopped;
 924                 } else if (!blk_pc_request(rq)) {
 925                         ide_cd_request_sense_fixup(drive, rq);
 926                         /* complain if we still have data left to transfer */
 927                         uptodate = rq->data_len ? 0 : 1;
 928                 }
 929                 goto end_request;
 930         }
 931
 932         /* check which way to transfer data */
 933         if (ide_cd_check_ireason(drive, rq, len, ireason, write))
 934                 return ide_stopped;
 935
 936         if (blk_fs_request(rq)) {
 937                 if (write == 0) {
 938                         int nskip;
 939
 940                         if (ide_cd_check_transfer_size(drive, len)) {
 941                                 cdrom_end_request(drive, 0);
 942                                 return ide_stopped;
 943                         }
 944
 945                         /*
 946                          * First, figure out if we need to bit-bucket
 947                          * any of the leading sectors.
 948                          */
 949                         nskip = min_t(int, rq->current_nr_sectors
 950                                            - bio_cur_sectors(rq->bio),
 951                                            thislen >> 9);
 952                         if (nskip > 0) {
 953                                 ide_pad_transfer(drive, write, nskip << 9);
 954                                 rq->current_nr_sectors -= nskip;
 955                                 thislen -= (nskip << 9);
 956                         }
 957                 }
 958         }
 959
 960         if (ireason == 0) {
 961                 write = 1;
 962                 xferfunc = hwif->tp_ops->output_data;
 963         } else {
 964                 write = 0;
 965                 xferfunc = hwif->tp_ops->input_data;
 966         }
 967
 968         ide_debug_log(IDE_DBG_PC, "%s: data transfer, rq->cmd_type: 0x%x, "
 969                       "ireason: 0x%x\n", __func__, rq->cmd_type, ireason);
 970
 971         /* transfer data */
 972         while (thislen > 0) {
 973                 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
 974                 int blen = rq->data_len;
 975
 976                 /* bio backed? */
 977                 if (rq->bio) {
 978                         if (blk_fs_request(rq)) {
 979                                 ptr = rq->buffer;
 980                                 blen = rq->current_nr_sectors << 9;
 981                         } else {
 982                                 ptr = bio_data(rq->bio);
 983                                 blen = bio_iovec(rq->bio)->bv_len;
 984                         }
 985                 }
 986
 987                 if (!ptr) {
 988                         if (blk_fs_request(rq) && !write)
 989                                 /*
 990                                  * If the buffers are full, pipe the rest into
 991                                  * oblivion.
 992                                  */
 993                                 ide_pad_transfer(drive, 0, thislen);
 994                         else {
 995                                 printk(KERN_ERR PFX "%s: confused, missing data\n",
 996                                                 drive->name);
 997                                 blk_dump_rq_flags(rq, rq_data_dir(rq)
 998                                                   ? "cdrom_newpc_intr, write"
 999                                                   : "cdrom_newpc_intr, read");
1000                         }
1001                         break;
1002                 }
1003
1004                 if (blen > thislen)
1005                         blen = thislen;
1006
1007                 xferfunc(drive, NULL, ptr, blen);
1008
1009                 thislen -= blen;
1010                 len -= blen;
1011
1012                 if (blk_fs_request(rq)) {
1013                         rq->buffer += blen;
1014                         rq->nr_sectors -= (blen >> 9);
1015                         rq->current_nr_sectors -= (blen >> 9);
1016                         rq->sector += (blen >> 9);
1017
1018                         if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1019                                 cdrom_end_request(drive, 1);
1020                 } else {
1021                         rq->data_len -= blen;
1022
1023                         /*
1024                          * The request can't be completed until DRQ is cleared.
1025                          * So complete the data, but don't complete the request
1026                          * using the dummy function for the callback feature
1027                          * of blk_end_request_callback().
1028                          */
1029                         if (rq->bio)
1030                                 blk_end_request_callback(rq, 0, blen,
1031                                                  cdrom_newpc_intr_dummy_cb);
1032                         else
1033                                 rq->data += blen;
1034                 }
1035                 if (!write && blk_sense_request(rq))
1036                         rq->sense_len += blen;
1037         }
1038
1039         /* pad, if necessary */
1040         if (!blk_fs_request(rq) && len > 0)
1041                 ide_pad_transfer(drive, write, len);
1042
1043         if (blk_pc_request(rq)) {
1044                 timeout = rq->timeout;
1045         } else {
1046                 timeout = ATAPI_WAIT_PC;
1047                 if (!blk_fs_request(rq))
1048                         expiry = ide_cd_expiry;
1049         }
1050
1051         ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1052         return ide_started;
1053
1054 end_request:
1055         if (blk_pc_request(rq)) {
1056                 unsigned int dlen = rq->data_len;
1057
1058                 if (dma)
1059                         rq->data_len = 0;
1060
1061                 if (blk_end_request(rq, 0, dlen))
1062                         BUG();
1063
1064                 hwgroup->rq = NULL;
1065         } else {
1066                 if (!uptodate)
1067                         rq->cmd_flags |= REQ_FAILED;
1068                 cdrom_end_request(drive, uptodate);
1069         }
1070         return ide_stopped;
1071 }
1072
1073 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1074 {
1075         struct cdrom_info *cd = drive->driver_data;
1076         int write = rq_data_dir(rq) == WRITE;
1077         unsigned short sectors_per_frame =
1078                 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1079
1080         ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x, "
1081                       "secs_per_frame: %u\n",
1082                       __func__, rq->cmd[0], write, sectors_per_frame);
1083
1084         if (write) {
1085                 /* disk has become write protected */
1086                 if (get_disk_ro(cd->disk)) {
1087                         cdrom_end_request(drive, 0);
1088                         return ide_stopped;
1089                 }
1090         } else {
1091                 /*
1092                  * We may be retrying this request after an error.  Fix up any
1093                  * weirdness which might be present in the request packet.
1094                  */
1095                 ide_cd_restore_request(drive, rq);
1096         }
1097
1098         /* use DMA, if possible / writes *must* be hardware frame aligned */
1099         if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1100             (rq->sector & (sectors_per_frame - 1))) {
1101                 if (write) {
1102                         cdrom_end_request(drive, 0);
1103                         return ide_stopped;
1104                 }
1105                 drive->dma = 0;
1106         } else
1107                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1108
1109         if (write)
1110                 cd->devinfo.media_written = 1;
1111
1112         return ide_started;
1113 }
1114
1115 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1116 {
1117
1118         ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, "
1119                       "rq->cmd_type: 0x%x\n", __func__, rq->cmd[0],
1120                       rq->cmd_type);
1121
1122         if (blk_pc_request(rq))
1123                 rq->cmd_flags |= REQ_QUIET;
1124         else
1125                 rq->cmd_flags &= ~REQ_FAILED;
1126
1127         drive->dma = 0;
1128
1129         /* sg request */
1130         if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1131                 struct request_queue *q = drive->queue;
1132                 unsigned int alignment;
1133                 char *buf;
1134
1135                 if (rq->bio)
1136                         buf = bio_data(rq->bio);
1137                 else
1138                         buf = rq->data;
1139
1140                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1141
1142                 /*
1143                  * check if dma is safe
1144                  *
1145                  * NOTE! The "len" and "addr" checks should possibly have
1146                  * separate masks.
1147                  */
1148                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1149                 if ((unsigned long)buf & alignment
1150                     || rq->data_len & q->dma_pad_mask
1151                     || object_is_on_stack(buf))
1152                         drive->dma = 0;
1153         }
1154 }
1155
1156 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1157                                         sector_t block)
1158 {
1159         ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, "
1160                       "rq->cmd_type: 0x%x, block: %llu\n",
1161                       __func__, rq->cmd[0], rq->cmd_type,
1162                       (unsigned long long)block);
1163
1164         if (blk_fs_request(rq)) {
1165                 if (cdrom_start_rw(drive, rq) == ide_stopped)
1166                         return ide_stopped;
1167
1168                 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1169                         return ide_stopped;
1170         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1171                    rq->cmd_type == REQ_TYPE_ATA_PC) {
1172                 if (!rq->timeout)
1173                         rq->timeout = ATAPI_WAIT_PC;
1174
1175                 cdrom_do_block_pc(drive, rq);
1176         } else if (blk_special_request(rq)) {
1177                 /* right now this can only be a reset... */
1178                 cdrom_end_request(drive, 1);
1179                 return ide_stopped;
1180         } else {
1181                 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1182                 cdrom_end_request(drive, 0);
1183                 return ide_stopped;
1184         }
1185
1186         return cdrom_start_packet_command(drive);
1187 }
1188
1189 /*
1190  * Ioctl handling.
1191  *
1192  * Routines which queue packet commands take as a final argument a pointer to a
1193  * request_sense struct. If execution of the command results in an error with a
1194  * CHECK CONDITION status, this structure will be filled with the results of the
1195  * subsequent request sense command. The pointer can also be NULL, in which case
1196  * no sense information is returned.
1197  */
1198 static void msf_from_bcd(struct atapi_msf *msf)
1199 {
1200         msf->minute = bcd2bin(msf->minute);
1201         msf->second = bcd2bin(msf->second);
1202         msf->frame  = bcd2bin(msf->frame);
1203 }
1204
1205 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1206 {
1207         struct cdrom_info *info = drive->driver_data;
1208         struct cdrom_device_info *cdi = &info->devinfo;
1209         unsigned char cmd[BLK_MAX_CDB];
1210
1211         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1212
1213         memset(cmd, 0, BLK_MAX_CDB);
1214         cmd[0] = GPCMD_TEST_UNIT_READY;
1215
1216         /*
1217          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1218          * instead of supporting the LOAD_UNLOAD opcode.
1219          */
1220         cmd[7] = cdi->sanyo_slot % 3;
1221
1222         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1223 }
1224
1225 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1226                                unsigned long *sectors_per_frame,
1227                                struct request_sense *sense)
1228 {
1229         struct {
1230                 __be32 lba;
1231                 __be32 blocklen;
1232         } capbuf;
1233
1234         int stat;
1235         unsigned char cmd[BLK_MAX_CDB];
1236         unsigned len = sizeof(capbuf);
1237         u32 blocklen;
1238
1239         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1240
1241         memset(cmd, 0, BLK_MAX_CDB);
1242         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1243
1244         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1245                                REQ_QUIET);
1246         if (stat)
1247                 return stat;
1248
1249         /*
1250          * Sanity check the given block size
1251          */
1252         blocklen = be32_to_cpu(capbuf.blocklen);
1253         switch (blocklen) {
1254         case 512:
1255         case 1024:
1256         case 2048:
1257         case 4096:
1258                 break;
1259         default:
1260                 printk(KERN_ERR PFX "%s: weird block size %u\n",
1261                                 drive->name, blocklen);
1262                 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1263                                 drive->name);
1264                 blocklen = 2048;
1265                 break;
1266         }
1267
1268         *capacity = 1 + be32_to_cpu(capbuf.lba);
1269         *sectors_per_frame = blocklen >> SECTOR_BITS;
1270
1271         ide_debug_log(IDE_DBG_PROBE, "%s: cap: %lu, sectors_per_frame: %lu\n",
1272                       __func__, *capacity, *sectors_per_frame);
1273
1274         return 0;
1275 }
1276
1277 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1278                                 int format, char *buf, int buflen,
1279                                 struct request_sense *sense)
1280 {
1281         unsigned char cmd[BLK_MAX_CDB];
1282
1283         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1284
1285         memset(cmd, 0, BLK_MAX_CDB);
1286
1287         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1288         cmd[6] = trackno;
1289         cmd[7] = (buflen >> 8);
1290         cmd[8] = (buflen & 0xff);
1291         cmd[9] = (format << 6);
1292
1293         if (msf_flag)
1294                 cmd[1] = 2;
1295
1296         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1297 }
1298
1299 /* Try to read the entire TOC for the disk into our internal buffer. */
1300 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1301 {
1302         int stat, ntracks, i;
1303         struct cdrom_info *info = drive->driver_data;
1304         struct cdrom_device_info *cdi = &info->devinfo;
1305         struct atapi_toc *toc = info->toc;
1306         struct {
1307                 struct atapi_toc_header hdr;
1308                 struct atapi_toc_entry  ent;
1309         } ms_tmp;
1310         long last_written;
1311         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1312
1313         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1314
1315         if (toc == NULL) {
1316                 /* try to allocate space */
1317                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1318                 if (toc == NULL) {
1319                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1320                                         drive->name);
1321                         return -ENOMEM;
1322                 }
1323                 info->toc = toc;
1324         }
1325
1326         /*
1327          * Check to see if the existing data is still valid. If it is,
1328          * just return.
1329          */
1330         (void) cdrom_check_status(drive, sense);
1331
1332         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1333                 return 0;
1334
1335         /* try to get the total cdrom capacity and sector size */
1336         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1337                                    sense);
1338         if (stat)
1339                 toc->capacity = 0x1fffff;
1340
1341         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1342         /* save a private copy of the TOC capacity for error handling */
1343         drive->probed_capacity = toc->capacity * sectors_per_frame;
1344
1345         blk_queue_hardsect_size(drive->queue,
1346                                 sectors_per_frame << SECTOR_BITS);
1347
1348         /* first read just the header, so we know how long the TOC is */
1349         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1350                                     sizeof(struct atapi_toc_header), sense);
1351         if (stat)
1352                 return stat;
1353
1354         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1355                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1356                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1357         }
1358
1359         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1360         if (ntracks <= 0)
1361                 return -EIO;
1362         if (ntracks > MAX_TRACKS)
1363                 ntracks = MAX_TRACKS;
1364
1365         /* now read the whole schmeer */
1366         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1367                                   (char *)&toc->hdr,
1368                                    sizeof(struct atapi_toc_header) +
1369                                    (ntracks + 1) *
1370                                    sizeof(struct atapi_toc_entry), sense);
1371
1372         if (stat && toc->hdr.first_track > 1) {
1373                 /*
1374                  * Cds with CDI tracks only don't have any TOC entries, despite
1375                  * of this the returned values are
1376                  * first_track == last_track = number of CDI tracks + 1,
1377                  * so that this case is indistinguishable from the same layout
1378                  * plus an additional audio track. If we get an error for the
1379                  * regular case, we assume a CDI without additional audio
1380                  * tracks. In this case the readable TOC is empty (CDI tracks
1381                  * are not included) and only holds the Leadout entry.
1382                  *
1383                  * Heiko Eißfeldt.
1384                  */
1385                 ntracks = 0;
1386                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1387                                            (char *)&toc->hdr,
1388                                            sizeof(struct atapi_toc_header) +
1389                                            (ntracks + 1) *
1390                                            sizeof(struct atapi_toc_entry),
1391                                            sense);
1392                 if (stat)
1393                         return stat;
1394
1395                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1396                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1397                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1398                 } else {
1399                         toc->hdr.first_track = CDROM_LEADOUT;
1400                         toc->hdr.last_track = CDROM_LEADOUT;
1401                 }
1402         }
1403
1404         if (stat)
1405                 return stat;
1406
1407         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1408
1409         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1410                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1411                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1412         }
1413
1414         for (i = 0; i <= ntracks; i++) {
1415                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1416                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1417                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1418                         msf_from_bcd(&toc->ent[i].addr.msf);
1419                 }
1420                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1421                                                   toc->ent[i].addr.msf.second,
1422                                                   toc->ent[i].addr.msf.frame);
1423         }
1424
1425         if (toc->hdr.first_track != CDROM_LEADOUT) {
1426                 /* read the multisession information */
1427                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1428                                            sizeof(ms_tmp), sense);
1429                 if (stat)
1430                         return stat;
1431
1432                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1433         } else {
1434                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1435                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1436                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1437         }
1438
1439         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1440                 /* re-read multisession information using MSF format */
1441                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1442                                            sizeof(ms_tmp), sense);
1443                 if (stat)
1444                         return stat;
1445
1446                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1447                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1448                                                    ms_tmp.ent.addr.msf.second,
1449                                                    ms_tmp.ent.addr.msf.frame);
1450         }
1451
1452         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1453
1454         /* now try to get the total cdrom capacity */
1455         stat = cdrom_get_last_written(cdi, &last_written);
1456         if (!stat && (last_written > toc->capacity)) {
1457                 toc->capacity = last_written;
1458                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1459                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1460         }
1461
1462         /* Remember that we've read this stuff. */
1463         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1464
1465         return 0;
1466 }
1467
1468 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1469 {
1470         struct cdrom_info *info = drive->driver_data;
1471         struct cdrom_device_info *cdi = &info->devinfo;
1472         struct packet_command cgc;
1473         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1474
1475         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1476
1477         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1478                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1479
1480         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1481         do {
1482                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1483                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1484                 if (!stat)
1485                         break;
1486         } while (--attempts);
1487         return stat;
1488 }
1489
1490 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1491 {
1492         struct cdrom_info *cd = drive->driver_data;
1493         u16 curspeed, maxspeed;
1494
1495         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1496
1497         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1498                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1499                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1500         } else {
1501                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1502                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1503         }
1504
1505         ide_debug_log(IDE_DBG_PROBE, "%s: curspeed: %u, maxspeed: %u\n",
1506                       __func__, curspeed, maxspeed);
1507
1508         cd->current_speed = (curspeed + (176/2)) / 176;
1509         cd->max_speed = (maxspeed + (176/2)) / 176;
1510 }
1511
1512 #define IDE_CD_CAPABILITIES \
1513         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1514          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1515          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1516          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1517          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1518
1519 static struct cdrom_device_ops ide_cdrom_dops = {
1520         .open                   = ide_cdrom_open_real,
1521         .release                = ide_cdrom_release_real,
1522         .drive_status           = ide_cdrom_drive_status,
1523         .media_changed          = ide_cdrom_check_media_change_real,
1524         .tray_move              = ide_cdrom_tray_move,
1525         .lock_door              = ide_cdrom_lock_door,
1526         .select_speed           = ide_cdrom_select_speed,
1527         .get_last_session       = ide_cdrom_get_last_session,
1528         .get_mcn                = ide_cdrom_get_mcn,
1529         .reset                  = ide_cdrom_reset,
1530         .audio_ioctl            = ide_cdrom_audio_ioctl,
1531         .capability             = IDE_CD_CAPABILITIES,
1532         .generic_packet         = ide_cdrom_packet,
1533 };
1534
1535 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1536 {
1537         struct cdrom_info *info = drive->driver_data;
1538         struct cdrom_device_info *devinfo = &info->devinfo;
1539
1540         ide_debug_log(IDE_DBG_PROBE, "Call %s, nslots: %d\n", __func__, nslots);
1541
1542         devinfo->ops = &ide_cdrom_dops;
1543         devinfo->speed = info->current_speed;
1544         devinfo->capacity = nslots;
1545         devinfo->handle = drive;
1546         strcpy(devinfo->name, drive->name);
1547
1548         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1549                 devinfo->mask |= CDC_SELECT_SPEED;
1550
1551         devinfo->disk = info->disk;
1552         return register_cdrom(devinfo);
1553 }
1554
1555 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1556 {
1557         struct cdrom_info *cd = drive->driver_data;
1558         struct cdrom_device_info *cdi = &cd->devinfo;
1559         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1560         mechtype_t mechtype;
1561         int nslots = 1;
1562
1563         ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->media: 0x%x, "
1564                       "drive->atapi_flags: 0x%lx\n", __func__, drive->media,
1565                       drive->atapi_flags);
1566
1567         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1568                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1569                      CDC_MO_DRIVE | CDC_RAM);
1570
1571         if (drive->media == ide_optical) {
1572                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1573                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1574                                 drive->name);
1575                 return nslots;
1576         }
1577
1578         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1579                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1580                 cdi->mask &= ~CDC_PLAY_AUDIO;
1581                 return nslots;
1582         }
1583
1584         /*
1585          * We have to cheat a little here. the packet will eventually be queued
1586          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1587          * Since this device hasn't been registered with the Uniform layer yet,
1588          * it can't do this. Same goes for cdi->ops.
1589          */
1590         cdi->handle = drive;
1591         cdi->ops = &ide_cdrom_dops;
1592
1593         if (ide_cdrom_get_capabilities(drive, buf))
1594                 return 0;
1595
1596         if ((buf[8 + 6] & 0x01) == 0)
1597                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1598         if (buf[8 + 6] & 0x08)
1599                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1600         if (buf[8 + 3] & 0x01)
1601                 cdi->mask &= ~CDC_CD_R;
1602         if (buf[8 + 3] & 0x02)
1603                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1604         if (buf[8 + 2] & 0x38)
1605                 cdi->mask &= ~CDC_DVD;
1606         if (buf[8 + 3] & 0x20)
1607                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1608         if (buf[8 + 3] & 0x10)
1609                 cdi->mask &= ~CDC_DVD_R;
1610         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1611                 cdi->mask &= ~CDC_PLAY_AUDIO;
1612
1613         mechtype = buf[8 + 6] >> 5;
1614         if (mechtype == mechtype_caddy ||
1615             mechtype == mechtype_popup ||
1616             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1617                 cdi->mask |= CDC_CLOSE_TRAY;
1618
1619         if (cdi->sanyo_slot > 0) {
1620                 cdi->mask &= ~CDC_SELECT_DISC;
1621                 nslots = 3;
1622         } else if (mechtype == mechtype_individual_changer ||
1623                    mechtype == mechtype_cartridge_changer) {
1624                 nslots = cdrom_number_of_slots(cdi);
1625                 if (nslots > 1)
1626                         cdi->mask &= ~CDC_SELECT_DISC;
1627         }
1628
1629         ide_cdrom_update_speed(drive, buf);
1630
1631         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1632
1633         /* don't print speed if the drive reported 0 */
1634         if (cd->max_speed)
1635                 printk(KERN_CONT " %dX", cd->max_speed);
1636
1637         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1638
1639         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1640                 printk(KERN_CONT " DVD%s%s",
1641                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1642                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1643
1644         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1645                 printk(KERN_CONT " CD%s%s",
1646                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1647                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1648
1649         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1650                 printk(KERN_CONT " changer w/%d slots", nslots);
1651         else
1652                 printk(KERN_CONT " drive");
1653
1654         printk(KERN_CONT ", %dkB Cache\n",
1655                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1656
1657         return nslots;
1658 }
1659
1660 /* standard prep_rq_fn that builds 10 byte cmds */
1661 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1662 {
1663         int hard_sect = queue_hardsect_size(q);
1664         long block = (long)rq->hard_sector / (hard_sect >> 9);
1665         unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1666
1667         memset(rq->cmd, 0, BLK_MAX_CDB);
1668
1669         if (rq_data_dir(rq) == READ)
1670                 rq->cmd[0] = GPCMD_READ_10;
1671         else
1672                 rq->cmd[0] = GPCMD_WRITE_10;
1673
1674         /*
1675          * fill in lba
1676          */
1677         rq->cmd[2] = (block >> 24) & 0xff;
1678         rq->cmd[3] = (block >> 16) & 0xff;
1679         rq->cmd[4] = (block >>  8) & 0xff;
1680         rq->cmd[5] = block & 0xff;
1681
1682         /*
1683          * and transfer length
1684          */
1685         rq->cmd[7] = (blocks >> 8) & 0xff;
1686         rq->cmd[8] = blocks & 0xff;
1687         rq->cmd_len = 10;
1688         return BLKPREP_OK;
1689 }
1690
1691 /*
1692  * Most of the SCSI commands are supported directly by ATAPI devices.
1693  * This transform handles the few exceptions.
1694  */
1695 static int ide_cdrom_prep_pc(struct request *rq)
1696 {
1697         u8 *c = rq->cmd;
1698
1699         /* transform 6-byte read/write commands to the 10-byte version */
1700         if (c[0] == READ_6 || c[0] == WRITE_6) {
1701                 c[8] = c[4];
1702                 c[5] = c[3];
1703                 c[4] = c[2];
1704                 c[3] = c[1] & 0x1f;
1705                 c[2] = 0;
1706                 c[1] &= 0xe0;
1707                 c[0] += (READ_10 - READ_6);
1708                 rq->cmd_len = 10;
1709                 return BLKPREP_OK;
1710         }
1711
1712         /*
1713          * it's silly to pretend we understand 6-byte sense commands, just
1714          * reject with ILLEGAL_REQUEST and the caller should take the
1715          * appropriate action
1716          */
1717         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1718                 rq->errors = ILLEGAL_REQUEST;
1719                 return BLKPREP_KILL;
1720         }
1721
1722         return BLKPREP_OK;
1723 }
1724
1725 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1726 {
1727         if (blk_fs_request(rq))
1728                 return ide_cdrom_prep_fs(q, rq);
1729         else if (blk_pc_request(rq))
1730                 return ide_cdrom_prep_pc(rq);
1731
1732         return 0;
1733 }
1734
1735 struct cd_list_entry {
1736         const char      *id_model;
1737         const char      *id_firmware;
1738         unsigned int    cd_flags;
1739 };
1740
1741 #ifdef CONFIG_IDE_PROC_FS
1742 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1743 {
1744         unsigned long capacity, sectors_per_frame;
1745
1746         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1747                 return 0;
1748
1749         return capacity * sectors_per_frame;
1750 }
1751
1752 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1753                                         int count, int *eof, void *data)
1754 {
1755         ide_drive_t *drive = data;
1756         int len;
1757
1758         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1759         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1760 }
1761
1762 static ide_proc_entry_t idecd_proc[] = {
1763         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1764         { NULL, 0, NULL, NULL }
1765 };
1766
1767 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1768 {
1769         return idecd_proc;
1770 }
1771
1772 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1773 {
1774         return NULL;
1775 }
1776 #endif
1777
1778 static const struct cd_list_entry ide_cd_quirks_list[] = {
1779         /* Limit transfer size per interrupt. */
1780         { "SAMSUNG CD-ROM SCR-2430", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1781         { "SAMSUNG CD-ROM SCR-2432", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1782         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1783         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1784         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1785         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1786                                              IDE_AFLAG_PRE_ATAPI12,          },
1787         /* Vertos 300, some versions of this drive like to talk BCD. */
1788         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1789         /* Vertos 600 ESD. */
1790         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1791         /*
1792          * Sanyo 3 CD changer uses a non-standard command for CD changing
1793          * (by default standard ATAPI support for CD changers is used).
1794          */
1795         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1796         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1797         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1798         /* Stingray 8X CD-ROM. */
1799         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1800         /*
1801          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1802          * mode sense page capabilities size, but older drives break.
1803          */
1804         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1805         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1806         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1807         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1808         /*
1809          * Some drives used by Apple don't advertise audio play
1810          * but they do support reading TOC & audio datas.
1811          */
1812         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1813         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1814         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1815         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1816         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1817         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1818         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1819         { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1820         { NULL, NULL, 0 }
1821 };
1822
1823 static unsigned int ide_cd_flags(u16 *id)
1824 {
1825         const struct cd_list_entry *cle = ide_cd_quirks_list;
1826
1827         while (cle->id_model) {
1828                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1829                     (cle->id_firmware == NULL ||
1830                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1831                         return cle->cd_flags;
1832                 cle++;
1833         }
1834
1835         return 0;
1836 }
1837
1838 static int ide_cdrom_setup(ide_drive_t *drive)
1839 {
1840         struct cdrom_info *cd = drive->driver_data;
1841         struct cdrom_device_info *cdi = &cd->devinfo;
1842         u16 *id = drive->id;
1843         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1844         int nslots;
1845
1846         ide_debug_log(IDE_DBG_PROBE, "Call %s\n", __func__);
1847
1848         blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1849         blk_queue_dma_alignment(drive->queue, 31);
1850         blk_queue_update_dma_pad(drive->queue, 15);
1851         drive->queue->unplug_delay = (1 * HZ) / 1000;
1852         if (!drive->queue->unplug_delay)
1853                 drive->queue->unplug_delay = 1;
1854
1855         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1856         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1857
1858         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1859             fw_rev[4] == '1' && fw_rev[6] <= '2')
1860                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1861                                      IDE_AFLAG_TOCADDR_AS_BCD);
1862         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1863                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1864                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1865         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1866                 /* 3 => use CD in slot 0 */
1867                 cdi->sanyo_slot = 3;
1868
1869         nslots = ide_cdrom_probe_capabilities(drive);
1870
1871         /* set correct block size */
1872         blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1873
1874         if (ide_cdrom_register(drive, nslots)) {
1875                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1876                                 " cdrom driver.\n", drive->name, __func__);
1877                 cd->devinfo.handle = NULL;
1878                 return 1;
1879         }
1880
1881         ide_proc_register_driver(drive, cd->driver);
1882         return 0;
1883 }
1884
1885 static void ide_cd_remove(ide_drive_t *drive)
1886 {
1887         struct cdrom_info *info = drive->driver_data;
1888
1889         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1890
1891         ide_proc_unregister_driver(drive, info->driver);
1892
1893         del_gendisk(info->disk);
1894
1895         ide_cd_put(info);
1896 }
1897
1898 static void ide_cd_release(struct kref *kref)
1899 {
1900         struct cdrom_info *info = to_ide_drv(kref, cdrom_info);
1901         struct cdrom_device_info *devinfo = &info->devinfo;
1902         ide_drive_t *drive = info->drive;
1903         struct gendisk *g = info->disk;
1904
1905         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1906
1907         kfree(info->toc);
1908         if (devinfo->handle == drive)
1909                 unregister_cdrom(devinfo);
1910         drive->driver_data = NULL;
1911         blk_queue_prep_rq(drive->queue, NULL);
1912         g->private_data = NULL;
1913         put_disk(g);
1914         kfree(info);
1915 }
1916
1917 static int ide_cd_probe(ide_drive_t *);
1918
1919 static ide_driver_t ide_cdrom_driver = {
1920         .gen_driver = {
1921                 .owner          = THIS_MODULE,
1922                 .name           = "ide-cdrom",
1923                 .bus            = &ide_bus_type,
1924         },
1925         .probe                  = ide_cd_probe,
1926         .remove                 = ide_cd_remove,
1927         .version                = IDECD_VERSION,
1928         .do_request             = ide_cd_do_request,
1929         .end_request            = ide_end_request,
1930         .error                  = __ide_error,
1931 #ifdef CONFIG_IDE_PROC_FS
1932         .proc_entries           = ide_cd_proc_entries,
1933         .proc_devsets           = ide_cd_proc_devsets,
1934 #endif
1935 };
1936
1937 static int idecd_open(struct block_device *bdev, fmode_t mode)
1938 {
1939         struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1940         int rc = -ENOMEM;
1941
1942         if (!info)
1943                 return -ENXIO;
1944
1945         rc = cdrom_open(&info->devinfo, bdev, mode);
1946
1947         if (rc < 0)
1948                 ide_cd_put(info);
1949
1950         return rc;
1951 }
1952
1953 static int idecd_release(struct gendisk *disk, fmode_t mode)
1954 {
1955         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1956
1957         cdrom_release(&info->devinfo, mode);
1958
1959         ide_cd_put(info);
1960
1961         return 0;
1962 }
1963
1964 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1965 {
1966         struct packet_command cgc;
1967         char buffer[16];
1968         int stat;
1969         char spindown;
1970
1971         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1972                 return -EFAULT;
1973
1974         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1975
1976         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1977         if (stat)
1978                 return stat;
1979
1980         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1981         return cdrom_mode_select(cdi, &cgc);
1982 }
1983
1984 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1985 {
1986         struct packet_command cgc;
1987         char buffer[16];
1988         int stat;
1989         char spindown;
1990
1991         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1992
1993         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1994         if (stat)
1995                 return stat;
1996
1997         spindown = buffer[11] & 0x0f;
1998         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1999                 return -EFAULT;
2000         return 0;
2001 }
2002
2003 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
2004                         unsigned int cmd, unsigned long arg)
2005 {
2006         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
2007         int err;
2008
2009         switch (cmd) {
2010         case CDROMSETSPINDOWN:
2011                 return idecd_set_spindown(&info->devinfo, arg);
2012         case CDROMGETSPINDOWN:
2013                 return idecd_get_spindown(&info->devinfo, arg);
2014         default:
2015                 break;
2016         }
2017
2018         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
2019         if (err == -EINVAL)
2020                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
2021
2022         return err;
2023 }
2024
2025 static int idecd_media_changed(struct gendisk *disk)
2026 {
2027         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2028         return cdrom_media_changed(&info->devinfo);
2029 }
2030
2031 static int idecd_revalidate_disk(struct gendisk *disk)
2032 {
2033         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2034         struct request_sense sense;
2035
2036         ide_cd_read_toc(info->drive, &sense);
2037
2038         return  0;
2039 }
2040
2041 static struct block_device_operations idecd_ops = {
2042         .owner                  = THIS_MODULE,
2043         .open                   = idecd_open,
2044         .release                = idecd_release,
2045         .locked_ioctl           = idecd_ioctl,
2046         .media_changed          = idecd_media_changed,
2047         .revalidate_disk        = idecd_revalidate_disk
2048 };
2049
2050 /* module options */
2051 static char *ignore;
2052 module_param(ignore, charp, 0400);
2053
2054 static unsigned long debug_mask;
2055 module_param(debug_mask, ulong, 0644);
2056
2057 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2058
2059 static int ide_cd_probe(ide_drive_t *drive)
2060 {
2061         struct cdrom_info *info;
2062         struct gendisk *g;
2063         struct request_sense sense;
2064
2065         ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->driver_req: %s, "
2066                       "drive->media: 0x%x\n", __func__, drive->driver_req,
2067                       drive->media);
2068
2069         if (!strstr("ide-cdrom", drive->driver_req))
2070                 goto failed;
2071
2072         if (drive->media != ide_cdrom && drive->media != ide_optical)
2073                 goto failed;
2074
2075         /* skip drives that we were told to ignore */
2076         if (ignore != NULL) {
2077                 if (strstr(ignore, drive->name)) {
2078                         printk(KERN_INFO PFX "ignoring drive %s\n",
2079                                          drive->name);
2080                         goto failed;
2081                 }
2082         }
2083
2084         drive->debug_mask = debug_mask;
2085
2086         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2087         if (info == NULL) {
2088                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
2089                                 drive->name);
2090                 goto failed;
2091         }
2092
2093         g = alloc_disk(1 << PARTN_BITS);
2094         if (!g)
2095                 goto out_free_cd;
2096
2097         ide_init_disk(g, drive);
2098
2099         kref_init(&info->kref);
2100
2101         info->drive = drive;
2102         info->driver = &ide_cdrom_driver;
2103         info->disk = g;
2104
2105         g->private_data = &info->driver;
2106
2107         drive->driver_data = info;
2108
2109         g->minors = 1;
2110         g->driverfs_dev = &drive->gendev;
2111         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2112         if (ide_cdrom_setup(drive)) {
2113                 ide_cd_release(&info->kref);
2114                 goto failed;
2115         }
2116
2117         ide_cd_read_toc(drive, &sense);
2118         g->fops = &idecd_ops;
2119         g->flags |= GENHD_FL_REMOVABLE;
2120         add_disk(g);
2121         return 0;
2122
2123 out_free_cd:
2124         kfree(info);
2125 failed:
2126         return -ENODEV;
2127 }
2128
2129 static void __exit ide_cdrom_exit(void)
2130 {
2131         driver_unregister(&ide_cdrom_driver.gen_driver);
2132 }
2133
2134 static int __init ide_cdrom_init(void)
2135 {
2136         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2137         return driver_register(&ide_cdrom_driver.gen_driver);
2138 }
2139
2140 MODULE_ALIAS("ide:*m-cdrom*");
2141 MODULE_ALIAS("ide-cd");
2142 module_init(ide_cdrom_init);
2143 module_exit(ide_cdrom_exit);
2144 MODULE_LICENSE("GPL");