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 = drive->hwif->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         struct request *rq = hwif->rq;
 310         int stat, err, sense_key;
 311
 312         /* check for errors */
 313         stat = hwif->tp_ops->read_status(hwif);
 314
 315         if (stat_ret)
 316                 *stat_ret = stat;
 317
 318         if (OK_STAT(stat, good_stat, BAD_R_STAT))
 319                 return 0;
 320
 321         /* get the IDE error register */
 322         err = ide_read_error(drive);
 323         sense_key = err >> 4;
 324
 325         if (rq == NULL) {
 326                 printk(KERN_ERR PFX "%s: missing rq in %s\n",
 327                                 drive->name, __func__);
 328                 return 1;
 329         }
 330
 331         ide_debug_log(IDE_DBG_RQ, "%s: stat: 0x%x, good_stat: 0x%x, "
 332                       "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x, err: 0x%x\n",
 333                       __func__, stat, good_stat, rq->cmd[0], rq->cmd_type, err);
 334
 335         if (blk_sense_request(rq)) {
 336                 /*
 337                  * We got an error trying to get sense info from the drive
 338                  * (probably while trying to recover from a former error).
 339                  * Just give up.
 340                  */
 341                 rq->cmd_flags |= REQ_FAILED;
 342                 cdrom_end_request(drive, 0);
 343                 ide_error(drive, "request sense failure", stat);
 344                 return 1;
 345
 346         } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
 347                 /* All other functions, except for READ. */
 348
 349                 /*
 350                  * if we have an error, pass back CHECK_CONDITION as the
 351                  * scsi status byte
 352                  */
 353                 if (blk_pc_request(rq) && !rq->errors)
 354                         rq->errors = SAM_STAT_CHECK_CONDITION;
 355
 356                 /* check for tray open */
 357                 if (sense_key == NOT_READY) {
 358                         cdrom_saw_media_change(drive);
 359                 } else if (sense_key == UNIT_ATTENTION) {
 360                         /* check for media change */
 361                         cdrom_saw_media_change(drive);
 362                         return 0;
 363                 } else if (sense_key == ILLEGAL_REQUEST &&
 364                            rq->cmd[0] == GPCMD_START_STOP_UNIT) {
 365                         /*
 366                          * Don't print error message for this condition--
 367                          * SFF8090i indicates that 5/24/00 is the correct
 368                          * response to a request to close the tray if the
 369                          * drive doesn't have that capability.
 370                          * cdrom_log_sense() knows this!
 371                          */
 372                 } else if (!(rq->cmd_flags & REQ_QUIET)) {
 373                         /* otherwise, print an error */
 374                         ide_dump_status(drive, "packet command error", stat);
 375                 }
 376
 377                 rq->cmd_flags |= REQ_FAILED;
 378
 379                 /*
 380                  * instead of playing games with moving completions around,
 381                  * remove failed request completely and end it when the
 382                  * request sense has completed
 383                  */
 384                 goto end_request;
 385
 386         } else if (blk_fs_request(rq)) {
 387                 int do_end_request = 0;
 388
 389                 /* handle errors from READ and WRITE requests */
 390
 391                 if (blk_noretry_request(rq))
 392                         do_end_request = 1;
 393
 394                 if (sense_key == NOT_READY) {
 395                         /* tray open */
 396                         if (rq_data_dir(rq) == READ) {
 397                                 cdrom_saw_media_change(drive);
 398
 399                                 /* fail the request */
 400                                 printk(KERN_ERR PFX "%s: tray open\n",
 401                                                 drive->name);
 402                                 do_end_request = 1;
 403                         } else {
 404                                 struct cdrom_info *info = drive->driver_data;
 405
 406                                 /*
 407                                  * Allow the drive 5 seconds to recover, some
 408                                  * devices will return this error while flushing
 409                                  * data from cache.
 410                                  */
 411                                 if (!rq->errors)
 412                                         info->write_timeout = jiffies +
 413                                                         ATAPI_WAIT_WRITE_BUSY;
 414                                 rq->errors = 1;
 415                                 if (time_after(jiffies, info->write_timeout))
 416                                         do_end_request = 1;
 417                                 else {
 418                                         struct request_queue *q = drive->queue;
 419                                         unsigned long flags;
 420
 421                                         /*
 422                                          * take a breather relying on the unplug
 423                                          * timer to kick us again
 424                                          */
 425                                         spin_lock_irqsave(q->queue_lock, flags);
 426                                         blk_plug_device(q);
 427                                         spin_unlock_irqrestore(q->queue_lock, flags);
 428
 429                                         return 1;
 430                                 }
 431                         }
 432                 } else if (sense_key == UNIT_ATTENTION) {
 433                         /* media change */
 434                         cdrom_saw_media_change(drive);
 435
 436                         /*
 437                          * Arrange to retry the request but be sure to give up
 438                          * if we've retried too many times.
 439                          */
 440                         if (++rq->errors > ERROR_MAX)
 441                                 do_end_request = 1;
 442                 } else if (sense_key == ILLEGAL_REQUEST ||
 443                            sense_key == DATA_PROTECT) {
 444                         /*
 445                          * No point in retrying after an illegal request or data
 446                          * protect error.
 447                          */
 448                         ide_dump_status_no_sense(drive, "command error", stat);
 449                         do_end_request = 1;
 450                 } else if (sense_key == MEDIUM_ERROR) {
 451                         /*
 452                          * No point in re-trying a zillion times on a bad
 453                          * sector. If we got here the error is not correctable.
 454                          */
 455                         ide_dump_status_no_sense(drive,
 456                                                  "media error (bad sector)",
 457                                                  stat);
 458                         do_end_request = 1;
 459                 } else if (sense_key == BLANK_CHECK) {
 460                         /* disk appears blank ?? */
 461                         ide_dump_status_no_sense(drive, "media error (blank)",
 462                                                  stat);
 463                         do_end_request = 1;
 464                 } else if ((err & ~ATA_ABORTED) != 0) {
 465                         /* go to the default handler for other errors */
 466                         ide_error(drive, "cdrom_decode_status", stat);
 467                         return 1;
 468                 } else if ((++rq->errors > ERROR_MAX)) {
 469                         /* we've racked up too many retries, abort */
 470                         do_end_request = 1;
 471                 }
 472
 473                 /*
 474                  * End a request through request sense analysis when we have
 475                  * sense data. We need this in order to perform end of media
 476                  * processing.
 477                  */
 478                 if (do_end_request)
 479                         goto end_request;
 480
 481                 /*
 482                  * If we got a CHECK_CONDITION status, queue
 483                  * a request sense command.
 484                  */
 485                 if (stat & ATA_ERR)
 486                         cdrom_queue_request_sense(drive, NULL, NULL);
 487         } else {
 488                 blk_dump_rq_flags(rq, PFX "bad rq");
 489                 cdrom_end_request(drive, 0);
 490         }
 491
 492         /* retry, or handle the next request */
 493         return 1;
 494
 495 end_request:
 496         if (stat & ATA_ERR) {
 497                 struct request_queue *q = drive->queue;
 498                 unsigned long flags;
 499
 500                 spin_lock_irqsave(q->queue_lock, flags);
 501                 blkdev_dequeue_request(rq);
 502                 spin_unlock_irqrestore(q->queue_lock, flags);
 503
 504                 hwif->rq = NULL;
 505
 506                 cdrom_queue_request_sense(drive, rq->sense, rq);
 507         } else
 508                 cdrom_end_request(drive, 0);
 509
 510         return 1;
 511 }
 512
 513 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *);
 514 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
 515
 516 /*
 517  * Set up the device registers for transferring a packet command on DEV,
 518  * expecting to later transfer XFERLEN bytes.  HANDLER is the routine
 519  * which actually transfers the command to the drive.  If this is a
 520  * drq_interrupt device, this routine will arrange for HANDLER to be
 521  * called when the interrupt from the drive arrives.  Otherwise, HANDLER
 522  * will be called immediately after the drive is prepared for the transfer.
 523  */
 524 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive)
 525 {
 526         ide_hwif_t *hwif = drive->hwif;
 527         struct request *rq = hwif->rq;
 528         int xferlen;
 529
 530         xferlen = ide_cd_get_xferlen(rq);
 531
 532         ide_debug_log(IDE_DBG_PC, "Call %s, xferlen: %d\n", __func__, xferlen);
 533
 534         /* FIXME: for Virtual DMA we must check harder */
 535         if (drive->dma)
 536                 drive->dma = !hwif->dma_ops->dma_setup(drive);
 537
 538         /* set up the controller registers */
 539         ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL,
 540                            xferlen, drive->dma);
 541
 542         if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
 543                 /* waiting for CDB interrupt, not DMA yet. */
 544                 if (drive->dma)
 545                         drive->waiting_for_dma = 0;
 546
 547                 /* packet command */
 548                 ide_execute_command(drive, ATA_CMD_PACKET,
 549                                     cdrom_transfer_packet_command,
 550                                     ATAPI_WAIT_PC, ide_cd_expiry);
 551                 return ide_started;
 552         } else {
 553                 ide_execute_pkt_cmd(drive);
 554
 555                 return cdrom_transfer_packet_command(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 {
 568         ide_hwif_t *hwif = drive->hwif;
 569         struct request *rq = hwif->rq;
 570         int cmd_len;
 571         ide_startstop_t startstop;
 572
 573         ide_debug_log(IDE_DBG_PC, "Call %s\n", __func__);
 574
 575         if (drive->atapi_flags & IDE_AFLAG_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, ATA_DRQ, NULL))
 583                         return ide_stopped;
 584
 585                 /* ok, next interrupt will be DMA interrupt */
 586                 if (drive->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, ATA_DRQ,
 591                                   ATA_BUSY, WAIT_READY))
 592                         return startstop;
 593         }
 594
 595         /* arm the interrupt handler */
 596         ide_set_handler(drive, cdrom_newpc_intr, rq->timeout, ide_cd_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->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
 605
 606         /* start the DMA if need be */
 607         if (drive->dma)
 608                 hwif->dma_ops->dma_start(drive);
 609
 610         return ide_started;
 611 }
 612
 613 /*
 614  * Check the contents of the interrupt reason register from the cdrom
 615  * and attempt to recover if there are problems.  Returns  0 if everything's
 616  * ok; nonzero if the request has been terminated.
 617  */
 618 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
 619                                 int len, int ireason, int rw)
 620 {
 621         ide_hwif_t *hwif = drive->hwif;
 622
 623         ide_debug_log(IDE_DBG_FUNC, "Call %s, ireason: 0x%x, rw: 0x%x\n",
 624                       __func__, ireason, rw);
 625
 626         /*
 627          * ireason == 0: the drive wants to receive data from us
 628          * ireason == 2: the drive is expecting to transfer data to us
 629          */
 630         if (ireason == (!rw << 1))
 631                 return 0;
 632         else if (ireason == (rw << 1)) {
 633
 634                 /* whoops... */
 635                 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
 636                                 drive->name, __func__);
 637
 638                 ide_pad_transfer(drive, rw, len);
 639         } else  if (rw == 0 && ireason == 1) {
 640                 /*
 641                  * Some drives (ASUS) seem to tell us that status info is
 642                  * available.  Just get it and ignore.
 643                  */
 644                 (void)hwif->tp_ops->read_status(hwif);
 645                 return 0;
 646         } else {
 647                 /* drive wants a command packet, or invalid ireason... */
 648                 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
 649                                 drive->name, __func__, ireason);
 650         }
 651
 652         if (rq->cmd_type == REQ_TYPE_ATA_PC)
 653                 rq->cmd_flags |= REQ_FAILED;
 654
 655         cdrom_end_request(drive, 0);
 656         return -1;
 657 }
 658
 659 /*
 660  * Assume that the drive will always provide data in multiples of at least
 661  * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
 662  */
 663 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
 664 {
 665         ide_debug_log(IDE_DBG_FUNC, "Call %s, len: %d\n", __func__, len);
 666
 667         if ((len % SECTOR_SIZE) == 0)
 668                 return 0;
 669
 670         printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
 671                         __func__, len);
 672
 673         if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
 674                 printk(KERN_ERR PFX "This drive is not supported by this "
 675                                 "version of the driver\n");
 676         else {
 677                 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
 678                 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
 679         }
 680
 681         return 1;
 682 }
 683
 684 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
 685                                                  struct request *rq)
 686 {
 687         ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd_flags: 0x%x\n", __func__,
 688                       rq->cmd_flags);
 689
 690         if (rq_data_dir(rq) == READ) {
 691                 unsigned short sectors_per_frame =
 692                         queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 693                 int nskip = rq->sector & (sectors_per_frame - 1);
 694
 695                 /*
 696                  * If the requested sector doesn't start on a frame boundary,
 697                  * we must adjust the start of the transfer so that it does,
 698                  * and remember to skip the first few sectors.
 699                  *
 700                  * If the rq->current_nr_sectors field is larger than the size
 701                  * of the buffer, it will mean that we're to skip a number of
 702                  * sectors equal to the amount by which rq->current_nr_sectors
 703                  * is larger than the buffer size.
 704                  */
 705                 if (nskip > 0) {
 706                         /* sanity check... */
 707                         if (rq->current_nr_sectors !=
 708                             bio_cur_sectors(rq->bio)) {
 709                                 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
 710                                                 drive->name, __func__,
 711                                                 rq->current_nr_sectors);
 712                                 cdrom_end_request(drive, 0);
 713                                 return ide_stopped;
 714                         }
 715                         rq->current_nr_sectors += nskip;
 716                 }
 717         }
 718
 719         /* set up the command */
 720         rq->timeout = ATAPI_WAIT_PC;
 721
 722         return ide_started;
 723 }
 724
 725 /*
 726  * Fix up a possibly partially-processed request so that we can start it over
 727  * entirely, or even put it back on the request queue.
 728  */
 729 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
 730 {
 731
 732         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
 733
 734         if (rq->buffer != bio_data(rq->bio)) {
 735                 sector_t n =
 736                         (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
 737
 738                 rq->buffer = bio_data(rq->bio);
 739                 rq->nr_sectors += n;
 740                 rq->sector -= n;
 741         }
 742         rq->current_nr_sectors = bio_cur_sectors(rq->bio);
 743         rq->hard_cur_sectors = rq->current_nr_sectors;
 744         rq->hard_nr_sectors = rq->nr_sectors;
 745         rq->hard_sector = rq->sector;
 746         rq->q->prep_rq_fn(rq->q, rq);
 747 }
 748
 749 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
 750 {
 751         ide_debug_log(IDE_DBG_FUNC, "Call %s, rq->cmd[0]: 0x%x\n",
 752                       __func__, rq->cmd[0]);
 753
 754         /*
 755          * Some of the trailing request sense fields are optional,
 756          * and some drives don't send them.  Sigh.
 757          */
 758         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 759             rq->data_len > 0 && rq->data_len <= 5)
 760                 while (rq->data_len > 0) {
 761                         *(u8 *)rq->data++ = 0;
 762                         --rq->data_len;
 763                 }
 764 }
 765
 766 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 767                     int write, void *buffer, unsigned *bufflen,
 768                     struct request_sense *sense, int timeout,
 769                     unsigned int cmd_flags)
 770 {
 771         struct cdrom_info *info = drive->driver_data;
 772         struct request_sense local_sense;
 773         int retries = 10;
 774         unsigned int flags = 0;
 775
 776         if (!sense)
 777                 sense = &local_sense;
 778
 779         ide_debug_log(IDE_DBG_PC, "Call %s, cmd[0]: 0x%x, write: 0x%x, "
 780                       "timeout: %d, cmd_flags: 0x%x\n", __func__, cmd[0], write,
 781                       timeout, cmd_flags);
 782
 783         /* start of retry loop */
 784         do {
 785                 struct request *rq;
 786                 int error;
 787
 788                 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
 789
 790                 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
 791                 rq->cmd_type = REQ_TYPE_ATA_PC;
 792                 rq->sense = sense;
 793                 rq->cmd_flags |= cmd_flags;
 794                 rq->timeout = timeout;
 795                 if (buffer) {
 796                         rq->data = buffer;
 797                         rq->data_len = *bufflen;
 798                 }
 799
 800                 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 801
 802                 if (buffer)
 803                         *bufflen = rq->data_len;
 804
 805                 flags = rq->cmd_flags;
 806                 blk_put_request(rq);
 807
 808                 /*
 809                  * FIXME: we should probably abort/retry or something in case of
 810                  * failure.
 811                  */
 812                 if (flags & REQ_FAILED) {
 813                         /*
 814                          * The request failed.  Retry if it was due to a unit
 815                          * attention status (usually means media was changed).
 816                          */
 817                         struct request_sense *reqbuf = sense;
 818
 819                         if (reqbuf->sense_key == UNIT_ATTENTION)
 820                                 cdrom_saw_media_change(drive);
 821                         else if (reqbuf->sense_key == NOT_READY &&
 822                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 823                                 /*
 824                                  * The drive is in the process of loading
 825                                  * a disk.  Retry, but wait a little to give
 826                                  * the drive time to complete the load.
 827                                  */
 828                                 ssleep(2);
 829                         } else {
 830                                 /* otherwise, don't retry */
 831                                 retries = 0;
 832                         }
 833                         --retries;
 834                 }
 835
 836                 /* end of retry loop */
 837         } while ((flags & REQ_FAILED) && retries >= 0);
 838
 839         /* return an error if the command failed */
 840         return (flags & REQ_FAILED) ? -EIO : 0;
 841 }
 842
 843 /*
 844  * Called from blk_end_request_callback() after the data of the request is
 845  * completed and before the request itself is completed. By returning value '1',
 846  * blk_end_request_callback() returns immediately without completing it.
 847  */
 848 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
 849 {
 850         return 1;
 851 }
 852
 853 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 854 {
 855         ide_hwif_t *hwif = drive->hwif;
 856         struct request *rq = hwif->rq;
 857         xfer_func_t *xferfunc;
 858         ide_expiry_t *expiry = NULL;
 859         int dma_error = 0, dma, stat, thislen, uptodate = 0;
 860         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
 861         unsigned int timeout;
 862         u16 len;
 863         u8 ireason;
 864
 865         ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x\n",
 866                       __func__, rq->cmd[0], write);
 867
 868         /* check for errors */
 869         dma = drive->dma;
 870         if (dma) {
 871                 drive->dma = 0;
 872                 dma_error = hwif->dma_ops->dma_end(drive);
 873                 if (dma_error) {
 874                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 875                                         write ? "write" : "read");
 876                         ide_dma_off(drive);
 877                 }
 878         }
 879
 880         if (cdrom_decode_status(drive, 0, &stat))
 881                 return ide_stopped;
 882
 883         /* using dma, transfer is complete now */
 884         if (dma) {
 885                 if (dma_error)
 886                         return ide_error(drive, "dma error", stat);
 887                 if (blk_fs_request(rq)) {
 888                         ide_end_request(drive, 1, rq->nr_sectors);
 889                         return ide_stopped;
 890                 }
 891                 goto end_request;
 892         }
 893
 894         ide_read_bcount_and_ireason(drive, &len, &ireason);
 895
 896         thislen = blk_fs_request(rq) ? len : rq->data_len;
 897         if (thislen > len)
 898                 thislen = len;
 899
 900         ide_debug_log(IDE_DBG_PC, "%s: DRQ: stat: 0x%x, thislen: %d\n",
 901                       __func__, stat, thislen);
 902
 903         /* If DRQ is clear, the command has completed. */
 904         if ((stat & ATA_DRQ) == 0) {
 905                 if (blk_fs_request(rq)) {
 906                         /*
 907                          * If we're not done reading/writing, complain.
 908                          * Otherwise, complete the command normally.
 909                          */
 910                         uptodate = 1;
 911                         if (rq->current_nr_sectors > 0) {
 912                                 printk(KERN_ERR PFX "%s: %s: data underrun "
 913                                                 "(%d blocks)\n",
 914                                                 drive->name, __func__,
 915                                                 rq->current_nr_sectors);
 916                                 if (!write)
 917                                         rq->cmd_flags |= REQ_FAILED;
 918                                 uptodate = 0;
 919                         }
 920                         cdrom_end_request(drive, uptodate);
 921                         return ide_stopped;
 922                 } else if (!blk_pc_request(rq)) {
 923                         ide_cd_request_sense_fixup(drive, rq);
 924                         /* complain if we still have data left to transfer */
 925                         uptodate = rq->data_len ? 0 : 1;
 926                 }
 927                 goto end_request;
 928         }
 929
 930         /* check which way to transfer data */
 931         if (ide_cd_check_ireason(drive, rq, len, ireason, write))
 932                 return ide_stopped;
 933
 934         if (blk_fs_request(rq)) {
 935                 if (write == 0) {
 936                         int nskip;
 937
 938                         if (ide_cd_check_transfer_size(drive, len)) {
 939                                 cdrom_end_request(drive, 0);
 940                                 return ide_stopped;
 941                         }
 942
 943                         /*
 944                          * First, figure out if we need to bit-bucket
 945                          * any of the leading sectors.
 946                          */
 947                         nskip = min_t(int, rq->current_nr_sectors
 948                                            - bio_cur_sectors(rq->bio),
 949                                            thislen >> 9);
 950                         if (nskip > 0) {
 951                                 ide_pad_transfer(drive, write, nskip << 9);
 952                                 rq->current_nr_sectors -= nskip;
 953                                 thislen -= (nskip << 9);
 954                         }
 955                 }
 956         }
 957
 958         if (ireason == 0) {
 959                 write = 1;
 960                 xferfunc = hwif->tp_ops->output_data;
 961         } else {
 962                 write = 0;
 963                 xferfunc = hwif->tp_ops->input_data;
 964         }
 965
 966         ide_debug_log(IDE_DBG_PC, "%s: data transfer, rq->cmd_type: 0x%x, "
 967                       "ireason: 0x%x\n", __func__, rq->cmd_type, ireason);
 968
 969         /* transfer data */
 970         while (thislen > 0) {
 971                 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
 972                 int blen = rq->data_len;
 973
 974                 /* bio backed? */
 975                 if (rq->bio) {
 976                         if (blk_fs_request(rq)) {
 977                                 ptr = rq->buffer;
 978                                 blen = rq->current_nr_sectors << 9;
 979                         } else {
 980                                 ptr = bio_data(rq->bio);
 981                                 blen = bio_iovec(rq->bio)->bv_len;
 982                         }
 983                 }
 984
 985                 if (!ptr) {
 986                         if (blk_fs_request(rq) && !write)
 987                                 /*
 988                                  * If the buffers are full, pipe the rest into
 989                                  * oblivion.
 990                                  */
 991                                 ide_pad_transfer(drive, 0, thislen);
 992                         else {
 993                                 printk(KERN_ERR PFX "%s: confused, missing data\n",
 994                                                 drive->name);
 995                                 blk_dump_rq_flags(rq, rq_data_dir(rq)
 996                                                   ? "cdrom_newpc_intr, write"
 997                                                   : "cdrom_newpc_intr, read");
 998                         }
 999                         break;
1000                 }
1001
1002                 if (blen > thislen)
1003                         blen = thislen;
1004
1005                 xferfunc(drive, NULL, ptr, blen);
1006
1007                 thislen -= blen;
1008                 len -= blen;
1009
1010                 if (blk_fs_request(rq)) {
1011                         rq->buffer += blen;
1012                         rq->nr_sectors -= (blen >> 9);
1013                         rq->current_nr_sectors -= (blen >> 9);
1014                         rq->sector += (blen >> 9);
1015
1016                         if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1017                                 cdrom_end_request(drive, 1);
1018                 } else {
1019                         rq->data_len -= blen;
1020
1021                         /*
1022                          * The request can't be completed until DRQ is cleared.
1023                          * So complete the data, but don't complete the request
1024                          * using the dummy function for the callback feature
1025                          * of blk_end_request_callback().
1026                          */
1027                         if (rq->bio)
1028                                 blk_end_request_callback(rq, 0, blen,
1029                                                  cdrom_newpc_intr_dummy_cb);
1030                         else
1031                                 rq->data += blen;
1032                 }
1033                 if (!write && blk_sense_request(rq))
1034                         rq->sense_len += blen;
1035         }
1036
1037         /* pad, if necessary */
1038         if (!blk_fs_request(rq) && len > 0)
1039                 ide_pad_transfer(drive, write, len);
1040
1041         if (blk_pc_request(rq)) {
1042                 timeout = rq->timeout;
1043         } else {
1044                 timeout = ATAPI_WAIT_PC;
1045                 if (!blk_fs_request(rq))
1046                         expiry = ide_cd_expiry;
1047         }
1048
1049         ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1050         return ide_started;
1051
1052 end_request:
1053         if (blk_pc_request(rq)) {
1054                 unsigned int dlen = rq->data_len;
1055
1056                 if (dma)
1057                         rq->data_len = 0;
1058
1059                 if (blk_end_request(rq, 0, dlen))
1060                         BUG();
1061
1062                 hwif->rq = NULL;
1063         } else {
1064                 if (!uptodate)
1065                         rq->cmd_flags |= REQ_FAILED;
1066                 cdrom_end_request(drive, uptodate);
1067         }
1068         return ide_stopped;
1069 }
1070
1071 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1072 {
1073         struct cdrom_info *cd = drive->driver_data;
1074         int write = rq_data_dir(rq) == WRITE;
1075         unsigned short sectors_per_frame =
1076                 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1077
1078         ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x, "
1079                       "secs_per_frame: %u\n",
1080                       __func__, rq->cmd[0], write, sectors_per_frame);
1081
1082         if (write) {
1083                 /* disk has become write protected */
1084                 if (get_disk_ro(cd->disk)) {
1085                         cdrom_end_request(drive, 0);
1086                         return ide_stopped;
1087                 }
1088         } else {
1089                 /*
1090                  * We may be retrying this request after an error.  Fix up any
1091                  * weirdness which might be present in the request packet.
1092                  */
1093                 ide_cd_restore_request(drive, rq);
1094         }
1095
1096         /* use DMA, if possible / writes *must* be hardware frame aligned */
1097         if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1098             (rq->sector & (sectors_per_frame - 1))) {
1099                 if (write) {
1100                         cdrom_end_request(drive, 0);
1101                         return ide_stopped;
1102                 }
1103                 drive->dma = 0;
1104         } else
1105                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1106
1107         if (write)
1108                 cd->devinfo.media_written = 1;
1109
1110         return ide_started;
1111 }
1112
1113 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1114 {
1115
1116         ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, "
1117                       "rq->cmd_type: 0x%x\n", __func__, rq->cmd[0],
1118                       rq->cmd_type);
1119
1120         if (blk_pc_request(rq))
1121                 rq->cmd_flags |= REQ_QUIET;
1122         else
1123                 rq->cmd_flags &= ~REQ_FAILED;
1124
1125         drive->dma = 0;
1126
1127         /* sg request */
1128         if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1129                 struct request_queue *q = drive->queue;
1130                 unsigned int alignment;
1131                 char *buf;
1132
1133                 if (rq->bio)
1134                         buf = bio_data(rq->bio);
1135                 else
1136                         buf = rq->data;
1137
1138                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1139
1140                 /*
1141                  * check if dma is safe
1142                  *
1143                  * NOTE! The "len" and "addr" checks should possibly have
1144                  * separate masks.
1145                  */
1146                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1147                 if ((unsigned long)buf & alignment
1148                     || rq->data_len & q->dma_pad_mask
1149                     || object_is_on_stack(buf))
1150                         drive->dma = 0;
1151         }
1152 }
1153
1154 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1155                                         sector_t block)
1156 {
1157         ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, "
1158                       "rq->cmd_type: 0x%x, block: %llu\n",
1159                       __func__, rq->cmd[0], rq->cmd_type,
1160                       (unsigned long long)block);
1161
1162         if (blk_fs_request(rq)) {
1163                 if (cdrom_start_rw(drive, rq) == ide_stopped)
1164                         return ide_stopped;
1165
1166                 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1167                         return ide_stopped;
1168         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1169                    rq->cmd_type == REQ_TYPE_ATA_PC) {
1170                 if (!rq->timeout)
1171                         rq->timeout = ATAPI_WAIT_PC;
1172
1173                 cdrom_do_block_pc(drive, rq);
1174         } else if (blk_special_request(rq)) {
1175                 /* right now this can only be a reset... */
1176                 cdrom_end_request(drive, 1);
1177                 return ide_stopped;
1178         } else {
1179                 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1180                 cdrom_end_request(drive, 0);
1181                 return ide_stopped;
1182         }
1183
1184         return cdrom_start_packet_command(drive);
1185 }
1186
1187 /*
1188  * Ioctl handling.
1189  *
1190  * Routines which queue packet commands take as a final argument a pointer to a
1191  * request_sense struct. If execution of the command results in an error with a
1192  * CHECK CONDITION status, this structure will be filled with the results of the
1193  * subsequent request sense command. The pointer can also be NULL, in which case
1194  * no sense information is returned.
1195  */
1196 static void msf_from_bcd(struct atapi_msf *msf)
1197 {
1198         msf->minute = bcd2bin(msf->minute);
1199         msf->second = bcd2bin(msf->second);
1200         msf->frame  = bcd2bin(msf->frame);
1201 }
1202
1203 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1204 {
1205         struct cdrom_info *info = drive->driver_data;
1206         struct cdrom_device_info *cdi = &info->devinfo;
1207         unsigned char cmd[BLK_MAX_CDB];
1208
1209         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1210
1211         memset(cmd, 0, BLK_MAX_CDB);
1212         cmd[0] = GPCMD_TEST_UNIT_READY;
1213
1214         /*
1215          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1216          * instead of supporting the LOAD_UNLOAD opcode.
1217          */
1218         cmd[7] = cdi->sanyo_slot % 3;
1219
1220         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1221 }
1222
1223 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1224                                unsigned long *sectors_per_frame,
1225                                struct request_sense *sense)
1226 {
1227         struct {
1228                 __be32 lba;
1229                 __be32 blocklen;
1230         } capbuf;
1231
1232         int stat;
1233         unsigned char cmd[BLK_MAX_CDB];
1234         unsigned len = sizeof(capbuf);
1235         u32 blocklen;
1236
1237         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1238
1239         memset(cmd, 0, BLK_MAX_CDB);
1240         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1241
1242         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1243                                REQ_QUIET);
1244         if (stat)
1245                 return stat;
1246
1247         /*
1248          * Sanity check the given block size
1249          */
1250         blocklen = be32_to_cpu(capbuf.blocklen);
1251         switch (blocklen) {
1252         case 512:
1253         case 1024:
1254         case 2048:
1255         case 4096:
1256                 break;
1257         default:
1258                 printk(KERN_ERR PFX "%s: weird block size %u\n",
1259                                 drive->name, blocklen);
1260                 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1261                                 drive->name);
1262                 blocklen = 2048;
1263                 break;
1264         }
1265
1266         *capacity = 1 + be32_to_cpu(capbuf.lba);
1267         *sectors_per_frame = blocklen >> SECTOR_BITS;
1268
1269         ide_debug_log(IDE_DBG_PROBE, "%s: cap: %lu, sectors_per_frame: %lu\n",
1270                       __func__, *capacity, *sectors_per_frame);
1271
1272         return 0;
1273 }
1274
1275 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1276                                 int format, char *buf, int buflen,
1277                                 struct request_sense *sense)
1278 {
1279         unsigned char cmd[BLK_MAX_CDB];
1280
1281         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1282
1283         memset(cmd, 0, BLK_MAX_CDB);
1284
1285         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1286         cmd[6] = trackno;
1287         cmd[7] = (buflen >> 8);
1288         cmd[8] = (buflen & 0xff);
1289         cmd[9] = (format << 6);
1290
1291         if (msf_flag)
1292                 cmd[1] = 2;
1293
1294         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1295 }
1296
1297 /* Try to read the entire TOC for the disk into our internal buffer. */
1298 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1299 {
1300         int stat, ntracks, i;
1301         struct cdrom_info *info = drive->driver_data;
1302         struct cdrom_device_info *cdi = &info->devinfo;
1303         struct atapi_toc *toc = info->toc;
1304         struct {
1305                 struct atapi_toc_header hdr;
1306                 struct atapi_toc_entry  ent;
1307         } ms_tmp;
1308         long last_written;
1309         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1310
1311         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1312
1313         if (toc == NULL) {
1314                 /* try to allocate space */
1315                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1316                 if (toc == NULL) {
1317                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1318                                         drive->name);
1319                         return -ENOMEM;
1320                 }
1321                 info->toc = toc;
1322         }
1323
1324         /*
1325          * Check to see if the existing data is still valid. If it is,
1326          * just return.
1327          */
1328         (void) cdrom_check_status(drive, sense);
1329
1330         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1331                 return 0;
1332
1333         /* try to get the total cdrom capacity and sector size */
1334         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1335                                    sense);
1336         if (stat)
1337                 toc->capacity = 0x1fffff;
1338
1339         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1340         /* save a private copy of the TOC capacity for error handling */
1341         drive->probed_capacity = toc->capacity * sectors_per_frame;
1342
1343         blk_queue_hardsect_size(drive->queue,
1344                                 sectors_per_frame << SECTOR_BITS);
1345
1346         /* first read just the header, so we know how long the TOC is */
1347         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1348                                     sizeof(struct atapi_toc_header), sense);
1349         if (stat)
1350                 return stat;
1351
1352         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1353                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1354                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1355         }
1356
1357         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1358         if (ntracks <= 0)
1359                 return -EIO;
1360         if (ntracks > MAX_TRACKS)
1361                 ntracks = MAX_TRACKS;
1362
1363         /* now read the whole schmeer */
1364         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1365                                   (char *)&toc->hdr,
1366                                    sizeof(struct atapi_toc_header) +
1367                                    (ntracks + 1) *
1368                                    sizeof(struct atapi_toc_entry), sense);
1369
1370         if (stat && toc->hdr.first_track > 1) {
1371                 /*
1372                  * Cds with CDI tracks only don't have any TOC entries, despite
1373                  * of this the returned values are
1374                  * first_track == last_track = number of CDI tracks + 1,
1375                  * so that this case is indistinguishable from the same layout
1376                  * plus an additional audio track. If we get an error for the
1377                  * regular case, we assume a CDI without additional audio
1378                  * tracks. In this case the readable TOC is empty (CDI tracks
1379                  * are not included) and only holds the Leadout entry.
1380                  *
1381                  * Heiko Eißfeldt.
1382                  */
1383                 ntracks = 0;
1384                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1385                                            (char *)&toc->hdr,
1386                                            sizeof(struct atapi_toc_header) +
1387                                            (ntracks + 1) *
1388                                            sizeof(struct atapi_toc_entry),
1389                                            sense);
1390                 if (stat)
1391                         return stat;
1392
1393                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1394                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1395                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1396                 } else {
1397                         toc->hdr.first_track = CDROM_LEADOUT;
1398                         toc->hdr.last_track = CDROM_LEADOUT;
1399                 }
1400         }
1401
1402         if (stat)
1403                 return stat;
1404
1405         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1406
1407         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1408                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1409                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1410         }
1411
1412         for (i = 0; i <= ntracks; i++) {
1413                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1414                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1415                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1416                         msf_from_bcd(&toc->ent[i].addr.msf);
1417                 }
1418                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1419                                                   toc->ent[i].addr.msf.second,
1420                                                   toc->ent[i].addr.msf.frame);
1421         }
1422
1423         if (toc->hdr.first_track != CDROM_LEADOUT) {
1424                 /* read the multisession information */
1425                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1426                                            sizeof(ms_tmp), sense);
1427                 if (stat)
1428                         return stat;
1429
1430                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1431         } else {
1432                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1433                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1434                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1435         }
1436
1437         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1438                 /* re-read multisession information using MSF format */
1439                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1440                                            sizeof(ms_tmp), sense);
1441                 if (stat)
1442                         return stat;
1443
1444                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1445                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1446                                                    ms_tmp.ent.addr.msf.second,
1447                                                    ms_tmp.ent.addr.msf.frame);
1448         }
1449
1450         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1451
1452         /* now try to get the total cdrom capacity */
1453         stat = cdrom_get_last_written(cdi, &last_written);
1454         if (!stat && (last_written > toc->capacity)) {
1455                 toc->capacity = last_written;
1456                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1457                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1458         }
1459
1460         /* Remember that we've read this stuff. */
1461         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1462
1463         return 0;
1464 }
1465
1466 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1467 {
1468         struct cdrom_info *info = drive->driver_data;
1469         struct cdrom_device_info *cdi = &info->devinfo;
1470         struct packet_command cgc;
1471         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1472
1473         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1474
1475         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1476                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1477
1478         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1479         do {
1480                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1481                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1482                 if (!stat)
1483                         break;
1484         } while (--attempts);
1485         return stat;
1486 }
1487
1488 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1489 {
1490         struct cdrom_info *cd = drive->driver_data;
1491         u16 curspeed, maxspeed;
1492
1493         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1494
1495         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1496                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1497                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1498         } else {
1499                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1500                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1501         }
1502
1503         ide_debug_log(IDE_DBG_PROBE, "%s: curspeed: %u, maxspeed: %u\n",
1504                       __func__, curspeed, maxspeed);
1505
1506         cd->current_speed = (curspeed + (176/2)) / 176;
1507         cd->max_speed = (maxspeed + (176/2)) / 176;
1508 }
1509
1510 #define IDE_CD_CAPABILITIES \
1511         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1512          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1513          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1514          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1515          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1516
1517 static struct cdrom_device_ops ide_cdrom_dops = {
1518         .open                   = ide_cdrom_open_real,
1519         .release                = ide_cdrom_release_real,
1520         .drive_status           = ide_cdrom_drive_status,
1521         .media_changed          = ide_cdrom_check_media_change_real,
1522         .tray_move              = ide_cdrom_tray_move,
1523         .lock_door              = ide_cdrom_lock_door,
1524         .select_speed           = ide_cdrom_select_speed,
1525         .get_last_session       = ide_cdrom_get_last_session,
1526         .get_mcn                = ide_cdrom_get_mcn,
1527         .reset                  = ide_cdrom_reset,
1528         .audio_ioctl            = ide_cdrom_audio_ioctl,
1529         .capability             = IDE_CD_CAPABILITIES,
1530         .generic_packet         = ide_cdrom_packet,
1531 };
1532
1533 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1534 {
1535         struct cdrom_info *info = drive->driver_data;
1536         struct cdrom_device_info *devinfo = &info->devinfo;
1537
1538         ide_debug_log(IDE_DBG_PROBE, "Call %s, nslots: %d\n", __func__, nslots);
1539
1540         devinfo->ops = &ide_cdrom_dops;
1541         devinfo->speed = info->current_speed;
1542         devinfo->capacity = nslots;
1543         devinfo->handle = drive;
1544         strcpy(devinfo->name, drive->name);
1545
1546         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1547                 devinfo->mask |= CDC_SELECT_SPEED;
1548
1549         devinfo->disk = info->disk;
1550         return register_cdrom(devinfo);
1551 }
1552
1553 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1554 {
1555         struct cdrom_info *cd = drive->driver_data;
1556         struct cdrom_device_info *cdi = &cd->devinfo;
1557         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1558         mechtype_t mechtype;
1559         int nslots = 1;
1560
1561         ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->media: 0x%x, "
1562                       "drive->atapi_flags: 0x%lx\n", __func__, drive->media,
1563                       drive->atapi_flags);
1564
1565         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1566                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1567                      CDC_MO_DRIVE | CDC_RAM);
1568
1569         if (drive->media == ide_optical) {
1570                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1571                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1572                                 drive->name);
1573                 return nslots;
1574         }
1575
1576         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1577                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1578                 cdi->mask &= ~CDC_PLAY_AUDIO;
1579                 return nslots;
1580         }
1581
1582         /*
1583          * We have to cheat a little here. the packet will eventually be queued
1584          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1585          * Since this device hasn't been registered with the Uniform layer yet,
1586          * it can't do this. Same goes for cdi->ops.
1587          */
1588         cdi->handle = drive;
1589         cdi->ops = &ide_cdrom_dops;
1590
1591         if (ide_cdrom_get_capabilities(drive, buf))
1592                 return 0;
1593
1594         if ((buf[8 + 6] & 0x01) == 0)
1595                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1596         if (buf[8 + 6] & 0x08)
1597                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1598         if (buf[8 + 3] & 0x01)
1599                 cdi->mask &= ~CDC_CD_R;
1600         if (buf[8 + 3] & 0x02)
1601                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1602         if (buf[8 + 2] & 0x38)
1603                 cdi->mask &= ~CDC_DVD;
1604         if (buf[8 + 3] & 0x20)
1605                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1606         if (buf[8 + 3] & 0x10)
1607                 cdi->mask &= ~CDC_DVD_R;
1608         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1609                 cdi->mask &= ~CDC_PLAY_AUDIO;
1610
1611         mechtype = buf[8 + 6] >> 5;
1612         if (mechtype == mechtype_caddy ||
1613             mechtype == mechtype_popup ||
1614             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1615                 cdi->mask |= CDC_CLOSE_TRAY;
1616
1617         if (cdi->sanyo_slot > 0) {
1618                 cdi->mask &= ~CDC_SELECT_DISC;
1619                 nslots = 3;
1620         } else if (mechtype == mechtype_individual_changer ||
1621                    mechtype == mechtype_cartridge_changer) {
1622                 nslots = cdrom_number_of_slots(cdi);
1623                 if (nslots > 1)
1624                         cdi->mask &= ~CDC_SELECT_DISC;
1625         }
1626
1627         ide_cdrom_update_speed(drive, buf);
1628
1629         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1630
1631         /* don't print speed if the drive reported 0 */
1632         if (cd->max_speed)
1633                 printk(KERN_CONT " %dX", cd->max_speed);
1634
1635         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1636
1637         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1638                 printk(KERN_CONT " DVD%s%s",
1639                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1640                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1641
1642         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1643                 printk(KERN_CONT " CD%s%s",
1644                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1645                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1646
1647         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1648                 printk(KERN_CONT " changer w/%d slots", nslots);
1649         else
1650                 printk(KERN_CONT " drive");
1651
1652         printk(KERN_CONT ", %dkB Cache\n",
1653                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1654
1655         return nslots;
1656 }
1657
1658 /* standard prep_rq_fn that builds 10 byte cmds */
1659 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1660 {
1661         int hard_sect = queue_hardsect_size(q);
1662         long block = (long)rq->hard_sector / (hard_sect >> 9);
1663         unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1664
1665         memset(rq->cmd, 0, BLK_MAX_CDB);
1666
1667         if (rq_data_dir(rq) == READ)
1668                 rq->cmd[0] = GPCMD_READ_10;
1669         else
1670                 rq->cmd[0] = GPCMD_WRITE_10;
1671
1672         /*
1673          * fill in lba
1674          */
1675         rq->cmd[2] = (block >> 24) & 0xff;
1676         rq->cmd[3] = (block >> 16) & 0xff;
1677         rq->cmd[4] = (block >>  8) & 0xff;
1678         rq->cmd[5] = block & 0xff;
1679
1680         /*
1681          * and transfer length
1682          */
1683         rq->cmd[7] = (blocks >> 8) & 0xff;
1684         rq->cmd[8] = blocks & 0xff;
1685         rq->cmd_len = 10;
1686         return BLKPREP_OK;
1687 }
1688
1689 /*
1690  * Most of the SCSI commands are supported directly by ATAPI devices.
1691  * This transform handles the few exceptions.
1692  */
1693 static int ide_cdrom_prep_pc(struct request *rq)
1694 {
1695         u8 *c = rq->cmd;
1696
1697         /* transform 6-byte read/write commands to the 10-byte version */
1698         if (c[0] == READ_6 || c[0] == WRITE_6) {
1699                 c[8] = c[4];
1700                 c[5] = c[3];
1701                 c[4] = c[2];
1702                 c[3] = c[1] & 0x1f;
1703                 c[2] = 0;
1704                 c[1] &= 0xe0;
1705                 c[0] += (READ_10 - READ_6);
1706                 rq->cmd_len = 10;
1707                 return BLKPREP_OK;
1708         }
1709
1710         /*
1711          * it's silly to pretend we understand 6-byte sense commands, just
1712          * reject with ILLEGAL_REQUEST and the caller should take the
1713          * appropriate action
1714          */
1715         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1716                 rq->errors = ILLEGAL_REQUEST;
1717                 return BLKPREP_KILL;
1718         }
1719
1720         return BLKPREP_OK;
1721 }
1722
1723 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1724 {
1725         if (blk_fs_request(rq))
1726                 return ide_cdrom_prep_fs(q, rq);
1727         else if (blk_pc_request(rq))
1728                 return ide_cdrom_prep_pc(rq);
1729
1730         return 0;
1731 }
1732
1733 struct cd_list_entry {
1734         const char      *id_model;
1735         const char      *id_firmware;
1736         unsigned int    cd_flags;
1737 };
1738
1739 #ifdef CONFIG_IDE_PROC_FS
1740 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1741 {
1742         unsigned long capacity, sectors_per_frame;
1743
1744         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1745                 return 0;
1746
1747         return capacity * sectors_per_frame;
1748 }
1749
1750 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1751                                         int count, int *eof, void *data)
1752 {
1753         ide_drive_t *drive = data;
1754         int len;
1755
1756         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1757         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1758 }
1759
1760 static ide_proc_entry_t idecd_proc[] = {
1761         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1762         { NULL, 0, NULL, NULL }
1763 };
1764
1765 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1766 {
1767         return idecd_proc;
1768 }
1769
1770 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1771 {
1772         return NULL;
1773 }
1774 #endif
1775
1776 static const struct cd_list_entry ide_cd_quirks_list[] = {
1777         /* Limit transfer size per interrupt. */
1778         { "SAMSUNG CD-ROM SCR-2430", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1779         { "SAMSUNG CD-ROM SCR-2432", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1780         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1781         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1782         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1783         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1784                                              IDE_AFLAG_PRE_ATAPI12,          },
1785         /* Vertos 300, some versions of this drive like to talk BCD. */
1786         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1787         /* Vertos 600 ESD. */
1788         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1789         /*
1790          * Sanyo 3 CD changer uses a non-standard command for CD changing
1791          * (by default standard ATAPI support for CD changers is used).
1792          */
1793         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1794         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1795         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1796         /* Stingray 8X CD-ROM. */
1797         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1798         /*
1799          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1800          * mode sense page capabilities size, but older drives break.
1801          */
1802         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1803         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1804         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1805         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1806         /*
1807          * Some drives used by Apple don't advertise audio play
1808          * but they do support reading TOC & audio datas.
1809          */
1810         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1811         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1812         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1813         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1814         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1815         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1816         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1817         { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1818         { NULL, NULL, 0 }
1819 };
1820
1821 static unsigned int ide_cd_flags(u16 *id)
1822 {
1823         const struct cd_list_entry *cle = ide_cd_quirks_list;
1824
1825         while (cle->id_model) {
1826                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1827                     (cle->id_firmware == NULL ||
1828                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1829                         return cle->cd_flags;
1830                 cle++;
1831         }
1832
1833         return 0;
1834 }
1835
1836 static int ide_cdrom_setup(ide_drive_t *drive)
1837 {
1838         struct cdrom_info *cd = drive->driver_data;
1839         struct cdrom_device_info *cdi = &cd->devinfo;
1840         u16 *id = drive->id;
1841         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1842         int nslots;
1843
1844         ide_debug_log(IDE_DBG_PROBE, "Call %s\n", __func__);
1845
1846         blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1847         blk_queue_dma_alignment(drive->queue, 31);
1848         blk_queue_update_dma_pad(drive->queue, 15);
1849         drive->queue->unplug_delay = (1 * HZ) / 1000;
1850         if (!drive->queue->unplug_delay)
1851                 drive->queue->unplug_delay = 1;
1852
1853         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1854         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1855
1856         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1857             fw_rev[4] == '1' && fw_rev[6] <= '2')
1858                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1859                                      IDE_AFLAG_TOCADDR_AS_BCD);
1860         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1861                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1862                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1863         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1864                 /* 3 => use CD in slot 0 */
1865                 cdi->sanyo_slot = 3;
1866
1867         nslots = ide_cdrom_probe_capabilities(drive);
1868
1869         /* set correct block size */
1870         blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1871
1872         if (ide_cdrom_register(drive, nslots)) {
1873                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1874                                 " cdrom driver.\n", drive->name, __func__);
1875                 cd->devinfo.handle = NULL;
1876                 return 1;
1877         }
1878
1879         ide_proc_register_driver(drive, cd->driver);
1880         return 0;
1881 }
1882
1883 static void ide_cd_remove(ide_drive_t *drive)
1884 {
1885         struct cdrom_info *info = drive->driver_data;
1886
1887         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1888
1889         ide_proc_unregister_driver(drive, info->driver);
1890
1891         del_gendisk(info->disk);
1892
1893         ide_cd_put(info);
1894 }
1895
1896 static void ide_cd_release(struct kref *kref)
1897 {
1898         struct cdrom_info *info = to_ide_drv(kref, cdrom_info);
1899         struct cdrom_device_info *devinfo = &info->devinfo;
1900         ide_drive_t *drive = info->drive;
1901         struct gendisk *g = info->disk;
1902
1903         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1904
1905         kfree(info->toc);
1906         if (devinfo->handle == drive)
1907                 unregister_cdrom(devinfo);
1908         drive->driver_data = NULL;
1909         blk_queue_prep_rq(drive->queue, NULL);
1910         g->private_data = NULL;
1911         put_disk(g);
1912         kfree(info);
1913 }
1914
1915 static int ide_cd_probe(ide_drive_t *);
1916
1917 static ide_driver_t ide_cdrom_driver = {
1918         .gen_driver = {
1919                 .owner          = THIS_MODULE,
1920                 .name           = "ide-cdrom",
1921                 .bus            = &ide_bus_type,
1922         },
1923         .probe                  = ide_cd_probe,
1924         .remove                 = ide_cd_remove,
1925         .version                = IDECD_VERSION,
1926         .do_request             = ide_cd_do_request,
1927         .end_request            = ide_end_request,
1928         .error                  = __ide_error,
1929 #ifdef CONFIG_IDE_PROC_FS
1930         .proc_entries           = ide_cd_proc_entries,
1931         .proc_devsets           = ide_cd_proc_devsets,
1932 #endif
1933 };
1934
1935 static int idecd_open(struct block_device *bdev, fmode_t mode)
1936 {
1937         struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1938         int rc = -ENOMEM;
1939
1940         if (!info)
1941                 return -ENXIO;
1942
1943         rc = cdrom_open(&info->devinfo, bdev, mode);
1944
1945         if (rc < 0)
1946                 ide_cd_put(info);
1947
1948         return rc;
1949 }
1950
1951 static int idecd_release(struct gendisk *disk, fmode_t mode)
1952 {
1953         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1954
1955         cdrom_release(&info->devinfo, mode);
1956
1957         ide_cd_put(info);
1958
1959         return 0;
1960 }
1961
1962 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1963 {
1964         struct packet_command cgc;
1965         char buffer[16];
1966         int stat;
1967         char spindown;
1968
1969         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1970                 return -EFAULT;
1971
1972         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1973
1974         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1975         if (stat)
1976                 return stat;
1977
1978         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1979         return cdrom_mode_select(cdi, &cgc);
1980 }
1981
1982 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1983 {
1984         struct packet_command cgc;
1985         char buffer[16];
1986         int stat;
1987         char spindown;
1988
1989         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1990
1991         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1992         if (stat)
1993                 return stat;
1994
1995         spindown = buffer[11] & 0x0f;
1996         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1997                 return -EFAULT;
1998         return 0;
1999 }
2000
2001 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
2002                         unsigned int cmd, unsigned long arg)
2003 {
2004         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
2005         int err;
2006
2007         switch (cmd) {
2008         case CDROMSETSPINDOWN:
2009                 return idecd_set_spindown(&info->devinfo, arg);
2010         case CDROMGETSPINDOWN:
2011                 return idecd_get_spindown(&info->devinfo, arg);
2012         default:
2013                 break;
2014         }
2015
2016         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
2017         if (err == -EINVAL)
2018                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
2019
2020         return err;
2021 }
2022
2023 static int idecd_media_changed(struct gendisk *disk)
2024 {
2025         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2026         return cdrom_media_changed(&info->devinfo);
2027 }
2028
2029 static int idecd_revalidate_disk(struct gendisk *disk)
2030 {
2031         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2032         struct request_sense sense;
2033
2034         ide_cd_read_toc(info->drive, &sense);
2035
2036         return  0;
2037 }
2038
2039 static struct block_device_operations idecd_ops = {
2040         .owner                  = THIS_MODULE,
2041         .open                   = idecd_open,
2042         .release                = idecd_release,
2043         .locked_ioctl           = idecd_ioctl,
2044         .media_changed          = idecd_media_changed,
2045         .revalidate_disk        = idecd_revalidate_disk
2046 };
2047
2048 /* module options */
2049 static char *ignore;
2050 module_param(ignore, charp, 0400);
2051
2052 static unsigned long debug_mask;
2053 module_param(debug_mask, ulong, 0644);
2054
2055 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2056
2057 static int ide_cd_probe(ide_drive_t *drive)
2058 {
2059         struct cdrom_info *info;
2060         struct gendisk *g;
2061         struct request_sense sense;
2062
2063         ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->driver_req: %s, "
2064                       "drive->media: 0x%x\n", __func__, drive->driver_req,
2065                       drive->media);
2066
2067         if (!strstr("ide-cdrom", drive->driver_req))
2068                 goto failed;
2069
2070         if (drive->media != ide_cdrom && drive->media != ide_optical)
2071                 goto failed;
2072
2073         /* skip drives that we were told to ignore */
2074         if (ignore != NULL) {
2075                 if (strstr(ignore, drive->name)) {
2076                         printk(KERN_INFO PFX "ignoring drive %s\n",
2077                                          drive->name);
2078                         goto failed;
2079                 }
2080         }
2081
2082         drive->debug_mask = debug_mask;
2083
2084         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2085         if (info == NULL) {
2086                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
2087                                 drive->name);
2088                 goto failed;
2089         }
2090
2091         g = alloc_disk(1 << PARTN_BITS);
2092         if (!g)
2093                 goto out_free_cd;
2094
2095         ide_init_disk(g, drive);
2096
2097         kref_init(&info->kref);
2098
2099         info->drive = drive;
2100         info->driver = &ide_cdrom_driver;
2101         info->disk = g;
2102
2103         g->private_data = &info->driver;
2104
2105         drive->driver_data = info;
2106
2107         g->minors = 1;
2108         g->driverfs_dev = &drive->gendev;
2109         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2110         if (ide_cdrom_setup(drive)) {
2111                 ide_cd_release(&info->kref);
2112                 goto failed;
2113         }
2114
2115         ide_cd_read_toc(drive, &sense);
2116         g->fops = &idecd_ops;
2117         g->flags |= GENHD_FL_REMOVABLE;
2118         add_disk(g);
2119         return 0;
2120
2121 out_free_cd:
2122         kfree(info);
2123 failed:
2124         return -ENODEV;
2125 }
2126
2127 static void __exit ide_cdrom_exit(void)
2128 {
2129         driver_unregister(&ide_cdrom_driver.gen_driver);
2130 }
2131
2132 static int __init ide_cdrom_init(void)
2133 {
2134         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2135         return driver_register(&ide_cdrom_driver.gen_driver);
2136 }
2137
2138 MODULE_ALIAS("ide:*m-cdrom*");
2139 MODULE_ALIAS("ide-cd");
2140 module_init(ide_cdrom_init);
2141 module_exit(ide_cdrom_exit);
2142 MODULE_LICENSE("GPL");