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 /*
 515  * Set up the device registers for transferring a packet command on DEV,
 516  * expecting to later transfer XFERLEN bytes.  HANDLER is the routine
 517  * which actually transfers the command to the drive.  If this is a
 518  * drq_interrupt device, this routine will arrange for HANDLER to be
 519  * called when the interrupt from the drive arrives.  Otherwise, HANDLER
 520  * will be called immediately after the drive is prepared for the transfer.
 521  */
 522 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
 523                                                   int xferlen,
 524                                                   ide_handler_t *handler)
 525 {
 526         ide_hwif_t *hwif = drive->hwif;
 527
 528         ide_debug_log(IDE_DBG_PC, "Call %s, xferlen: %d\n", __func__, xferlen);
 529
 530         /* FIXME: for Virtual DMA we must check harder */
 531         if (drive->dma)
 532                 drive->dma = !hwif->dma_ops->dma_setup(drive);
 533
 534         /* set up the controller registers */
 535         ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL,
 536                            xferlen, drive->dma);
 537
 538         if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
 539                 /* waiting for CDB interrupt, not DMA yet. */
 540                 if (drive->dma)
 541                         drive->waiting_for_dma = 0;
 542
 543                 /* packet command */
 544                 ide_execute_command(drive, ATA_CMD_PACKET, handler,
 545                                     ATAPI_WAIT_PC, ide_cd_expiry);
 546                 return ide_started;
 547         } else {
 548                 ide_execute_pkt_cmd(drive);
 549
 550                 return (*handler) (drive);
 551         }
 552 }
 553
 554 /*
 555  * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
 556  * registers must have already been prepared by cdrom_start_packet_command.
 557  * HANDLER is the interrupt handler to call when the command completes or
 558  * there's data ready.
 559  */
 560 #define ATAPI_MIN_CDB_BYTES 12
 561 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive,
 562                                           struct request *rq,
 563                                           ide_handler_t *handler)
 564 {
 565         ide_hwif_t *hwif = drive->hwif;
 566         int cmd_len;
 567         ide_startstop_t startstop;
 568
 569         ide_debug_log(IDE_DBG_PC, "Call %s\n", __func__);
 570
 571         if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
 572                 /*
 573                  * Here we should have been called after receiving an interrupt
 574                  * from the device.  DRQ should how be set.
 575                  */
 576
 577                 /* check for errors */
 578                 if (cdrom_decode_status(drive, ATA_DRQ, NULL))
 579                         return ide_stopped;
 580
 581                 /* ok, next interrupt will be DMA interrupt */
 582                 if (drive->dma)
 583                         drive->waiting_for_dma = 1;
 584         } else {
 585                 /* otherwise, we must wait for DRQ to get set */
 586                 if (ide_wait_stat(&startstop, drive, ATA_DRQ,
 587                                   ATA_BUSY, WAIT_READY))
 588                         return startstop;
 589         }
 590
 591         /* arm the interrupt handler */
 592         ide_set_handler(drive, handler, rq->timeout, ide_cd_expiry);
 593
 594         /* ATAPI commands get padded out to 12 bytes minimum */
 595         cmd_len = COMMAND_SIZE(rq->cmd[0]);
 596         if (cmd_len < ATAPI_MIN_CDB_BYTES)
 597                 cmd_len = ATAPI_MIN_CDB_BYTES;
 598
 599         /* send the command to the device */
 600         hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
 601
 602         /* start the DMA if need be */
 603         if (drive->dma)
 604                 hwif->dma_ops->dma_start(drive);
 605
 606         return ide_started;
 607 }
 608
 609 /*
 610  * Check the contents of the interrupt reason register from the cdrom
 611  * and attempt to recover if there are problems.  Returns  0 if everything's
 612  * ok; nonzero if the request has been terminated.
 613  */
 614 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
 615                                 int len, int ireason, int rw)
 616 {
 617         ide_hwif_t *hwif = drive->hwif;
 618
 619         ide_debug_log(IDE_DBG_FUNC, "Call %s, ireason: 0x%x, rw: 0x%x\n",
 620                       __func__, ireason, rw);
 621
 622         /*
 623          * ireason == 0: the drive wants to receive data from us
 624          * ireason == 2: the drive is expecting to transfer data to us
 625          */
 626         if (ireason == (!rw << 1))
 627                 return 0;
 628         else if (ireason == (rw << 1)) {
 629
 630                 /* whoops... */
 631                 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
 632                                 drive->name, __func__);
 633
 634                 ide_pad_transfer(drive, rw, len);
 635         } else  if (rw == 0 && ireason == 1) {
 636                 /*
 637                  * Some drives (ASUS) seem to tell us that status info is
 638                  * available.  Just get it and ignore.
 639                  */
 640                 (void)hwif->tp_ops->read_status(hwif);
 641                 return 0;
 642         } else {
 643                 /* drive wants a command packet, or invalid ireason... */
 644                 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
 645                                 drive->name, __func__, ireason);
 646         }
 647
 648         if (rq->cmd_type == REQ_TYPE_ATA_PC)
 649                 rq->cmd_flags |= REQ_FAILED;
 650
 651         cdrom_end_request(drive, 0);
 652         return -1;
 653 }
 654
 655 /*
 656  * Assume that the drive will always provide data in multiples of at least
 657  * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
 658  */
 659 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
 660 {
 661         ide_debug_log(IDE_DBG_FUNC, "Call %s, len: %d\n", __func__, len);
 662
 663         if ((len % SECTOR_SIZE) == 0)
 664                 return 0;
 665
 666         printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
 667                         __func__, len);
 668
 669         if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
 670                 printk(KERN_ERR PFX "This drive is not supported by this "
 671                                 "version of the driver\n");
 672         else {
 673                 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
 674                 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
 675         }
 676
 677         return 1;
 678 }
 679
 680 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
 681
 682 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
 683                                                  struct request *rq)
 684 {
 685         ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd_flags: 0x%x\n", __func__,
 686                       rq->cmd_flags);
 687
 688         if (rq_data_dir(rq) == READ) {
 689                 unsigned short sectors_per_frame =
 690                         queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 691                 int nskip = rq->sector & (sectors_per_frame - 1);
 692
 693                 /*
 694                  * If the requested sector doesn't start on a frame boundary,
 695                  * we must adjust the start of the transfer so that it does,
 696                  * and remember to skip the first few sectors.
 697                  *
 698                  * If the rq->current_nr_sectors field is larger than the size
 699                  * of the buffer, it will mean that we're to skip a number of
 700                  * sectors equal to the amount by which rq->current_nr_sectors
 701                  * is larger than the buffer size.
 702                  */
 703                 if (nskip > 0) {
 704                         /* sanity check... */
 705                         if (rq->current_nr_sectors !=
 706                             bio_cur_sectors(rq->bio)) {
 707                                 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
 708                                                 drive->name, __func__,
 709                                                 rq->current_nr_sectors);
 710                                 cdrom_end_request(drive, 0);
 711                                 return ide_stopped;
 712                         }
 713                         rq->current_nr_sectors += nskip;
 714                 }
 715         }
 716
 717         /* set up the command */
 718         rq->timeout = ATAPI_WAIT_PC;
 719
 720         return ide_started;
 721 }
 722
 723 /*
 724  * Routine to send a read/write packet command to the drive. This is usually
 725  * called directly from cdrom_start_{read,write}(). However, for drq_interrupt
 726  * devices, it is called from an interrupt when the drive is ready to accept
 727  * the command.
 728  */
 729 static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive)
 730 {
 731         struct request *rq = drive->hwif->hwgroup->rq;
 732
 733         /* send the command to the drive and return */
 734         return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
 735 }
 736
 737 /*
 738  * Fix up a possibly partially-processed request so that we can start it over
 739  * entirely, or even put it back on the request queue.
 740  */
 741 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
 742 {
 743
 744         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
 745
 746         if (rq->buffer != bio_data(rq->bio)) {
 747                 sector_t n =
 748                         (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
 749
 750                 rq->buffer = bio_data(rq->bio);
 751                 rq->nr_sectors += n;
 752                 rq->sector -= n;
 753         }
 754         rq->current_nr_sectors = bio_cur_sectors(rq->bio);
 755         rq->hard_cur_sectors = rq->current_nr_sectors;
 756         rq->hard_nr_sectors = rq->nr_sectors;
 757         rq->hard_sector = rq->sector;
 758         rq->q->prep_rq_fn(rq->q, rq);
 759 }
 760
 761 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
 762 {
 763         ide_debug_log(IDE_DBG_FUNC, "Call %s, rq->cmd[0]: 0x%x\n",
 764                       __func__, rq->cmd[0]);
 765
 766         /*
 767          * Some of the trailing request sense fields are optional,
 768          * and some drives don't send them.  Sigh.
 769          */
 770         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 771             rq->data_len > 0 && rq->data_len <= 5)
 772                 while (rq->data_len > 0) {
 773                         *(u8 *)rq->data++ = 0;
 774                         --rq->data_len;
 775                 }
 776 }
 777
 778 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 779                     int write, void *buffer, unsigned *bufflen,
 780                     struct request_sense *sense, int timeout,
 781                     unsigned int cmd_flags)
 782 {
 783         struct cdrom_info *info = drive->driver_data;
 784         struct request_sense local_sense;
 785         int retries = 10;
 786         unsigned int flags = 0;
 787
 788         if (!sense)
 789                 sense = &local_sense;
 790
 791         ide_debug_log(IDE_DBG_PC, "Call %s, cmd[0]: 0x%x, write: 0x%x, "
 792                       "timeout: %d, cmd_flags: 0x%x\n", __func__, cmd[0], write,
 793                       timeout, cmd_flags);
 794
 795         /* start of retry loop */
 796         do {
 797                 struct request *rq;
 798                 int error;
 799
 800                 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
 801
 802                 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
 803                 rq->cmd_type = REQ_TYPE_ATA_PC;
 804                 rq->sense = sense;
 805                 rq->cmd_flags |= cmd_flags;
 806                 rq->timeout = timeout;
 807                 if (buffer) {
 808                         rq->data = buffer;
 809                         rq->data_len = *bufflen;
 810                 }
 811
 812                 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 813
 814                 if (buffer)
 815                         *bufflen = rq->data_len;
 816
 817                 flags = rq->cmd_flags;
 818                 blk_put_request(rq);
 819
 820                 /*
 821                  * FIXME: we should probably abort/retry or something in case of
 822                  * failure.
 823                  */
 824                 if (flags & REQ_FAILED) {
 825                         /*
 826                          * The request failed.  Retry if it was due to a unit
 827                          * attention status (usually means media was changed).
 828                          */
 829                         struct request_sense *reqbuf = sense;
 830
 831                         if (reqbuf->sense_key == UNIT_ATTENTION)
 832                                 cdrom_saw_media_change(drive);
 833                         else if (reqbuf->sense_key == NOT_READY &&
 834                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 835                                 /*
 836                                  * The drive is in the process of loading
 837                                  * a disk.  Retry, but wait a little to give
 838                                  * the drive time to complete the load.
 839                                  */
 840                                 ssleep(2);
 841                         } else {
 842                                 /* otherwise, don't retry */
 843                                 retries = 0;
 844                         }
 845                         --retries;
 846                 }
 847
 848                 /* end of retry loop */
 849         } while ((flags & REQ_FAILED) && retries >= 0);
 850
 851         /* return an error if the command failed */
 852         return (flags & REQ_FAILED) ? -EIO : 0;
 853 }
 854
 855 /*
 856  * Called from blk_end_request_callback() after the data of the request is
 857  * completed and before the request itself is completed. By returning value '1',
 858  * blk_end_request_callback() returns immediately without completing it.
 859  */
 860 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
 861 {
 862         return 1;
 863 }
 864
 865 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 866 {
 867         ide_hwif_t *hwif = drive->hwif;
 868         ide_hwgroup_t *hwgroup = hwif->hwgroup;
 869         struct request *rq = hwgroup->rq;
 870         xfer_func_t *xferfunc;
 871         ide_expiry_t *expiry = NULL;
 872         int dma_error = 0, dma, stat, thislen, uptodate = 0;
 873         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
 874         unsigned int timeout;
 875         u16 len;
 876         u8 ireason;
 877
 878         ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x\n",
 879                       __func__, rq->cmd[0], write);
 880
 881         /* check for errors */
 882         dma = drive->dma;
 883         if (dma) {
 884                 drive->dma = 0;
 885                 dma_error = hwif->dma_ops->dma_end(drive);
 886                 if (dma_error) {
 887                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 888                                         write ? "write" : "read");
 889                         ide_dma_off(drive);
 890                 }
 891         }
 892
 893         if (cdrom_decode_status(drive, 0, &stat))
 894                 return ide_stopped;
 895
 896         /* using dma, transfer is complete now */
 897         if (dma) {
 898                 if (dma_error)
 899                         return ide_error(drive, "dma error", stat);
 900                 if (blk_fs_request(rq)) {
 901                         ide_end_request(drive, 1, rq->nr_sectors);
 902                         return ide_stopped;
 903                 }
 904                 goto end_request;
 905         }
 906
 907         ide_read_bcount_and_ireason(drive, &len, &ireason);
 908
 909         thislen = blk_fs_request(rq) ? len : rq->data_len;
 910         if (thislen > len)
 911                 thislen = len;
 912
 913         ide_debug_log(IDE_DBG_PC, "%s: DRQ: stat: 0x%x, thislen: %d\n",
 914                       __func__, stat, thislen);
 915
 916         /* If DRQ is clear, the command has completed. */
 917         if ((stat & ATA_DRQ) == 0) {
 918                 if (blk_fs_request(rq)) {
 919                         /*
 920                          * If we're not done reading/writing, complain.
 921                          * Otherwise, complete the command normally.
 922                          */
 923                         uptodate = 1;
 924                         if (rq->current_nr_sectors > 0) {
 925                                 printk(KERN_ERR PFX "%s: %s: data underrun "
 926                                                 "(%d blocks)\n",
 927                                                 drive->name, __func__,
 928                                                 rq->current_nr_sectors);
 929                                 if (!write)
 930                                         rq->cmd_flags |= REQ_FAILED;
 931                                 uptodate = 0;
 932                         }
 933                         cdrom_end_request(drive, uptodate);
 934                         return ide_stopped;
 935                 } else if (!blk_pc_request(rq)) {
 936                         ide_cd_request_sense_fixup(drive, rq);
 937                         /* complain if we still have data left to transfer */
 938                         uptodate = rq->data_len ? 0 : 1;
 939                 }
 940                 goto end_request;
 941         }
 942
 943         /* check which way to transfer data */
 944         if (ide_cd_check_ireason(drive, rq, len, ireason, write))
 945                 return ide_stopped;
 946
 947         if (blk_fs_request(rq)) {
 948                 if (write == 0) {
 949                         int nskip;
 950
 951                         if (ide_cd_check_transfer_size(drive, len)) {
 952                                 cdrom_end_request(drive, 0);
 953                                 return ide_stopped;
 954                         }
 955
 956                         /*
 957                          * First, figure out if we need to bit-bucket
 958                          * any of the leading sectors.
 959                          */
 960                         nskip = min_t(int, rq->current_nr_sectors
 961                                            - bio_cur_sectors(rq->bio),
 962                                            thislen >> 9);
 963                         if (nskip > 0) {
 964                                 ide_pad_transfer(drive, write, nskip << 9);
 965                                 rq->current_nr_sectors -= nskip;
 966                                 thislen -= (nskip << 9);
 967                         }
 968                 }
 969         }
 970
 971         if (ireason == 0) {
 972                 write = 1;
 973                 xferfunc = hwif->tp_ops->output_data;
 974         } else {
 975                 write = 0;
 976                 xferfunc = hwif->tp_ops->input_data;
 977         }
 978
 979         ide_debug_log(IDE_DBG_PC, "%s: data transfer, rq->cmd_type: 0x%x, "
 980                       "ireason: 0x%x\n", __func__, rq->cmd_type, ireason);
 981
 982         /* transfer data */
 983         while (thislen > 0) {
 984                 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
 985                 int blen = rq->data_len;
 986
 987                 /* bio backed? */
 988                 if (rq->bio) {
 989                         if (blk_fs_request(rq)) {
 990                                 ptr = rq->buffer;
 991                                 blen = rq->current_nr_sectors << 9;
 992                         } else {
 993                                 ptr = bio_data(rq->bio);
 994                                 blen = bio_iovec(rq->bio)->bv_len;
 995                         }
 996                 }
 997
 998                 if (!ptr) {
 999                         if (blk_fs_request(rq) && !write)
1000                                 /*
1001                                  * If the buffers are full, pipe the rest into
1002                                  * oblivion.
1003                                  */
1004                                 ide_pad_transfer(drive, 0, thislen);
1005                         else {
1006                                 printk(KERN_ERR PFX "%s: confused, missing data\n",
1007                                                 drive->name);
1008                                 blk_dump_rq_flags(rq, rq_data_dir(rq)
1009                                                   ? "cdrom_newpc_intr, write"
1010                                                   : "cdrom_newpc_intr, read");
1011                         }
1012                         break;
1013                 }
1014
1015                 if (blen > thislen)
1016                         blen = thislen;
1017
1018                 xferfunc(drive, NULL, ptr, blen);
1019
1020                 thislen -= blen;
1021                 len -= blen;
1022
1023                 if (blk_fs_request(rq)) {
1024                         rq->buffer += blen;
1025                         rq->nr_sectors -= (blen >> 9);
1026                         rq->current_nr_sectors -= (blen >> 9);
1027                         rq->sector += (blen >> 9);
1028
1029                         if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1030                                 cdrom_end_request(drive, 1);
1031                 } else {
1032                         rq->data_len -= blen;
1033
1034                         /*
1035                          * The request can't be completed until DRQ is cleared.
1036                          * So complete the data, but don't complete the request
1037                          * using the dummy function for the callback feature
1038                          * of blk_end_request_callback().
1039                          */
1040                         if (rq->bio)
1041                                 blk_end_request_callback(rq, 0, blen,
1042                                                  cdrom_newpc_intr_dummy_cb);
1043                         else
1044                                 rq->data += blen;
1045                 }
1046                 if (!write && blk_sense_request(rq))
1047                         rq->sense_len += blen;
1048         }
1049
1050         /* pad, if necessary */
1051         if (!blk_fs_request(rq) && len > 0)
1052                 ide_pad_transfer(drive, write, len);
1053
1054         if (blk_pc_request(rq)) {
1055                 timeout = rq->timeout;
1056         } else {
1057                 timeout = ATAPI_WAIT_PC;
1058                 if (!blk_fs_request(rq))
1059                         expiry = ide_cd_expiry;
1060         }
1061
1062         ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1063         return ide_started;
1064
1065 end_request:
1066         if (blk_pc_request(rq)) {
1067                 unsigned int dlen = rq->data_len;
1068
1069                 if (dma)
1070                         rq->data_len = 0;
1071
1072                 if (blk_end_request(rq, 0, dlen))
1073                         BUG();
1074
1075                 hwgroup->rq = NULL;
1076         } else {
1077                 if (!uptodate)
1078                         rq->cmd_flags |= REQ_FAILED;
1079                 cdrom_end_request(drive, uptodate);
1080         }
1081         return ide_stopped;
1082 }
1083
1084 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1085 {
1086         struct cdrom_info *cd = drive->driver_data;
1087         int write = rq_data_dir(rq) == WRITE;
1088         unsigned short sectors_per_frame =
1089                 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1090
1091         ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x, "
1092                       "secs_per_frame: %u\n",
1093                       __func__, rq->cmd[0], write, sectors_per_frame);
1094
1095         if (write) {
1096                 /* disk has become write protected */
1097                 if (get_disk_ro(cd->disk)) {
1098                         cdrom_end_request(drive, 0);
1099                         return ide_stopped;
1100                 }
1101         } else {
1102                 /*
1103                  * We may be retrying this request after an error.  Fix up any
1104                  * weirdness which might be present in the request packet.
1105                  */
1106                 ide_cd_restore_request(drive, rq);
1107         }
1108
1109         /* use DMA, if possible / writes *must* be hardware frame aligned */
1110         if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1111             (rq->sector & (sectors_per_frame - 1))) {
1112                 if (write) {
1113                         cdrom_end_request(drive, 0);
1114                         return ide_stopped;
1115                 }
1116                 drive->dma = 0;
1117         } else
1118                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1119
1120         if (write)
1121                 cd->devinfo.media_written = 1;
1122
1123         return ide_started;
1124 }
1125
1126 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1127 {
1128         struct request *rq = HWGROUP(drive)->rq;
1129
1130         return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1131 }
1132
1133 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1134 {
1135
1136         ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, "
1137                       "rq->cmd_type: 0x%x\n", __func__, rq->cmd[0],
1138                       rq->cmd_type);
1139
1140         if (blk_pc_request(rq))
1141                 rq->cmd_flags |= REQ_QUIET;
1142         else
1143                 rq->cmd_flags &= ~REQ_FAILED;
1144
1145         drive->dma = 0;
1146
1147         /* sg request */
1148         if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1149                 struct request_queue *q = drive->queue;
1150                 unsigned int alignment;
1151                 char *buf;
1152
1153                 if (rq->bio)
1154                         buf = bio_data(rq->bio);
1155                 else
1156                         buf = rq->data;
1157
1158                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1159
1160                 /*
1161                  * check if dma is safe
1162                  *
1163                  * NOTE! The "len" and "addr" checks should possibly have
1164                  * separate masks.
1165                  */
1166                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1167                 if ((unsigned long)buf & alignment
1168                     || rq->data_len & q->dma_pad_mask
1169                     || object_is_on_stack(buf))
1170                         drive->dma = 0;
1171         }
1172 }
1173
1174 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1175                                         sector_t block)
1176 {
1177         ide_handler_t *fn;
1178         int xferlen;
1179
1180         ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, "
1181                       "rq->cmd_type: 0x%x, block: %llu\n",
1182                       __func__, rq->cmd[0], rq->cmd_type,
1183                       (unsigned long long)block);
1184
1185         xferlen = ide_cd_get_xferlen(rq);
1186
1187         if (blk_fs_request(rq)) {
1188                 fn = cdrom_start_rw_cont;
1189
1190                 if (cdrom_start_rw(drive, rq) == ide_stopped)
1191                         return ide_stopped;
1192
1193                 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1194                         return ide_stopped;
1195         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1196                    rq->cmd_type == REQ_TYPE_ATA_PC) {
1197                 fn = cdrom_do_newpc_cont;
1198
1199                 if (!rq->timeout)
1200                         rq->timeout = ATAPI_WAIT_PC;
1201
1202                 cdrom_do_block_pc(drive, rq);
1203         } else if (blk_special_request(rq)) {
1204                 /* right now this can only be a reset... */
1205                 cdrom_end_request(drive, 1);
1206                 return ide_stopped;
1207         } else {
1208                 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1209                 cdrom_end_request(drive, 0);
1210                 return ide_stopped;
1211         }
1212
1213         return cdrom_start_packet_command(drive, xferlen, fn);
1214 }
1215
1216 /*
1217  * Ioctl handling.
1218  *
1219  * Routines which queue packet commands take as a final argument a pointer to a
1220  * request_sense struct. If execution of the command results in an error with a
1221  * CHECK CONDITION status, this structure will be filled with the results of the
1222  * subsequent request sense command. The pointer can also be NULL, in which case
1223  * no sense information is returned.
1224  */
1225 static void msf_from_bcd(struct atapi_msf *msf)
1226 {
1227         msf->minute = bcd2bin(msf->minute);
1228         msf->second = bcd2bin(msf->second);
1229         msf->frame  = bcd2bin(msf->frame);
1230 }
1231
1232 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1233 {
1234         struct cdrom_info *info = drive->driver_data;
1235         struct cdrom_device_info *cdi = &info->devinfo;
1236         unsigned char cmd[BLK_MAX_CDB];
1237
1238         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1239
1240         memset(cmd, 0, BLK_MAX_CDB);
1241         cmd[0] = GPCMD_TEST_UNIT_READY;
1242
1243         /*
1244          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1245          * instead of supporting the LOAD_UNLOAD opcode.
1246          */
1247         cmd[7] = cdi->sanyo_slot % 3;
1248
1249         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1250 }
1251
1252 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1253                                unsigned long *sectors_per_frame,
1254                                struct request_sense *sense)
1255 {
1256         struct {
1257                 __be32 lba;
1258                 __be32 blocklen;
1259         } capbuf;
1260
1261         int stat;
1262         unsigned char cmd[BLK_MAX_CDB];
1263         unsigned len = sizeof(capbuf);
1264         u32 blocklen;
1265
1266         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1267
1268         memset(cmd, 0, BLK_MAX_CDB);
1269         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1270
1271         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1272                                REQ_QUIET);
1273         if (stat)
1274                 return stat;
1275
1276         /*
1277          * Sanity check the given block size
1278          */
1279         blocklen = be32_to_cpu(capbuf.blocklen);
1280         switch (blocklen) {
1281         case 512:
1282         case 1024:
1283         case 2048:
1284         case 4096:
1285                 break;
1286         default:
1287                 printk(KERN_ERR PFX "%s: weird block size %u\n",
1288                                 drive->name, blocklen);
1289                 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1290                                 drive->name);
1291                 blocklen = 2048;
1292                 break;
1293         }
1294
1295         *capacity = 1 + be32_to_cpu(capbuf.lba);
1296         *sectors_per_frame = blocklen >> SECTOR_BITS;
1297
1298         ide_debug_log(IDE_DBG_PROBE, "%s: cap: %lu, sectors_per_frame: %lu\n",
1299                       __func__, *capacity, *sectors_per_frame);
1300
1301         return 0;
1302 }
1303
1304 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1305                                 int format, char *buf, int buflen,
1306                                 struct request_sense *sense)
1307 {
1308         unsigned char cmd[BLK_MAX_CDB];
1309
1310         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1311
1312         memset(cmd, 0, BLK_MAX_CDB);
1313
1314         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1315         cmd[6] = trackno;
1316         cmd[7] = (buflen >> 8);
1317         cmd[8] = (buflen & 0xff);
1318         cmd[9] = (format << 6);
1319
1320         if (msf_flag)
1321                 cmd[1] = 2;
1322
1323         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1324 }
1325
1326 /* Try to read the entire TOC for the disk into our internal buffer. */
1327 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1328 {
1329         int stat, ntracks, i;
1330         struct cdrom_info *info = drive->driver_data;
1331         struct cdrom_device_info *cdi = &info->devinfo;
1332         struct atapi_toc *toc = info->toc;
1333         struct {
1334                 struct atapi_toc_header hdr;
1335                 struct atapi_toc_entry  ent;
1336         } ms_tmp;
1337         long last_written;
1338         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1339
1340         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1341
1342         if (toc == NULL) {
1343                 /* try to allocate space */
1344                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1345                 if (toc == NULL) {
1346                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1347                                         drive->name);
1348                         return -ENOMEM;
1349                 }
1350                 info->toc = toc;
1351         }
1352
1353         /*
1354          * Check to see if the existing data is still valid. If it is,
1355          * just return.
1356          */
1357         (void) cdrom_check_status(drive, sense);
1358
1359         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1360                 return 0;
1361
1362         /* try to get the total cdrom capacity and sector size */
1363         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1364                                    sense);
1365         if (stat)
1366                 toc->capacity = 0x1fffff;
1367
1368         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1369         /* save a private copy of the TOC capacity for error handling */
1370         drive->probed_capacity = toc->capacity * sectors_per_frame;
1371
1372         blk_queue_hardsect_size(drive->queue,
1373                                 sectors_per_frame << SECTOR_BITS);
1374
1375         /* first read just the header, so we know how long the TOC is */
1376         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1377                                     sizeof(struct atapi_toc_header), sense);
1378         if (stat)
1379                 return stat;
1380
1381         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1382                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1383                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1384         }
1385
1386         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1387         if (ntracks <= 0)
1388                 return -EIO;
1389         if (ntracks > MAX_TRACKS)
1390                 ntracks = MAX_TRACKS;
1391
1392         /* now read the whole schmeer */
1393         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1394                                   (char *)&toc->hdr,
1395                                    sizeof(struct atapi_toc_header) +
1396                                    (ntracks + 1) *
1397                                    sizeof(struct atapi_toc_entry), sense);
1398
1399         if (stat && toc->hdr.first_track > 1) {
1400                 /*
1401                  * Cds with CDI tracks only don't have any TOC entries, despite
1402                  * of this the returned values are
1403                  * first_track == last_track = number of CDI tracks + 1,
1404                  * so that this case is indistinguishable from the same layout
1405                  * plus an additional audio track. If we get an error for the
1406                  * regular case, we assume a CDI without additional audio
1407                  * tracks. In this case the readable TOC is empty (CDI tracks
1408                  * are not included) and only holds the Leadout entry.
1409                  *
1410                  * Heiko Eißfeldt.
1411                  */
1412                 ntracks = 0;
1413                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1414                                            (char *)&toc->hdr,
1415                                            sizeof(struct atapi_toc_header) +
1416                                            (ntracks + 1) *
1417                                            sizeof(struct atapi_toc_entry),
1418                                            sense);
1419                 if (stat)
1420                         return stat;
1421
1422                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1423                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1424                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1425                 } else {
1426                         toc->hdr.first_track = CDROM_LEADOUT;
1427                         toc->hdr.last_track = CDROM_LEADOUT;
1428                 }
1429         }
1430
1431         if (stat)
1432                 return stat;
1433
1434         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1435
1436         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1437                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1438                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1439         }
1440
1441         for (i = 0; i <= ntracks; i++) {
1442                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1443                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1444                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1445                         msf_from_bcd(&toc->ent[i].addr.msf);
1446                 }
1447                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1448                                                   toc->ent[i].addr.msf.second,
1449                                                   toc->ent[i].addr.msf.frame);
1450         }
1451
1452         if (toc->hdr.first_track != CDROM_LEADOUT) {
1453                 /* read the multisession information */
1454                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1455                                            sizeof(ms_tmp), sense);
1456                 if (stat)
1457                         return stat;
1458
1459                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1460         } else {
1461                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1462                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1463                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1464         }
1465
1466         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1467                 /* re-read multisession information using MSF format */
1468                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1469                                            sizeof(ms_tmp), sense);
1470                 if (stat)
1471                         return stat;
1472
1473                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1474                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1475                                                    ms_tmp.ent.addr.msf.second,
1476                                                    ms_tmp.ent.addr.msf.frame);
1477         }
1478
1479         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1480
1481         /* now try to get the total cdrom capacity */
1482         stat = cdrom_get_last_written(cdi, &last_written);
1483         if (!stat && (last_written > toc->capacity)) {
1484                 toc->capacity = last_written;
1485                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1486                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1487         }
1488
1489         /* Remember that we've read this stuff. */
1490         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1491
1492         return 0;
1493 }
1494
1495 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1496 {
1497         struct cdrom_info *info = drive->driver_data;
1498         struct cdrom_device_info *cdi = &info->devinfo;
1499         struct packet_command cgc;
1500         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1501
1502         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1503
1504         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1505                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1506
1507         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1508         do {
1509                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1510                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1511                 if (!stat)
1512                         break;
1513         } while (--attempts);
1514         return stat;
1515 }
1516
1517 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1518 {
1519         struct cdrom_info *cd = drive->driver_data;
1520         u16 curspeed, maxspeed;
1521
1522         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1523
1524         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1525                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1526                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1527         } else {
1528                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1529                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1530         }
1531
1532         ide_debug_log(IDE_DBG_PROBE, "%s: curspeed: %u, maxspeed: %u\n",
1533                       __func__, curspeed, maxspeed);
1534
1535         cd->current_speed = (curspeed + (176/2)) / 176;
1536         cd->max_speed = (maxspeed + (176/2)) / 176;
1537 }
1538
1539 #define IDE_CD_CAPABILITIES \
1540         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1541          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1542          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1543          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1544          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1545
1546 static struct cdrom_device_ops ide_cdrom_dops = {
1547         .open                   = ide_cdrom_open_real,
1548         .release                = ide_cdrom_release_real,
1549         .drive_status           = ide_cdrom_drive_status,
1550         .media_changed          = ide_cdrom_check_media_change_real,
1551         .tray_move              = ide_cdrom_tray_move,
1552         .lock_door              = ide_cdrom_lock_door,
1553         .select_speed           = ide_cdrom_select_speed,
1554         .get_last_session       = ide_cdrom_get_last_session,
1555         .get_mcn                = ide_cdrom_get_mcn,
1556         .reset                  = ide_cdrom_reset,
1557         .audio_ioctl            = ide_cdrom_audio_ioctl,
1558         .capability             = IDE_CD_CAPABILITIES,
1559         .generic_packet         = ide_cdrom_packet,
1560 };
1561
1562 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1563 {
1564         struct cdrom_info *info = drive->driver_data;
1565         struct cdrom_device_info *devinfo = &info->devinfo;
1566
1567         ide_debug_log(IDE_DBG_PROBE, "Call %s, nslots: %d\n", __func__, nslots);
1568
1569         devinfo->ops = &ide_cdrom_dops;
1570         devinfo->speed = info->current_speed;
1571         devinfo->capacity = nslots;
1572         devinfo->handle = drive;
1573         strcpy(devinfo->name, drive->name);
1574
1575         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1576                 devinfo->mask |= CDC_SELECT_SPEED;
1577
1578         devinfo->disk = info->disk;
1579         return register_cdrom(devinfo);
1580 }
1581
1582 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1583 {
1584         struct cdrom_info *cd = drive->driver_data;
1585         struct cdrom_device_info *cdi = &cd->devinfo;
1586         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1587         mechtype_t mechtype;
1588         int nslots = 1;
1589
1590         ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->media: 0x%x, "
1591                       "drive->atapi_flags: 0x%lx\n", __func__, drive->media,
1592                       drive->atapi_flags);
1593
1594         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1595                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1596                      CDC_MO_DRIVE | CDC_RAM);
1597
1598         if (drive->media == ide_optical) {
1599                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1600                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1601                                 drive->name);
1602                 return nslots;
1603         }
1604
1605         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1606                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1607                 cdi->mask &= ~CDC_PLAY_AUDIO;
1608                 return nslots;
1609         }
1610
1611         /*
1612          * We have to cheat a little here. the packet will eventually be queued
1613          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1614          * Since this device hasn't been registered with the Uniform layer yet,
1615          * it can't do this. Same goes for cdi->ops.
1616          */
1617         cdi->handle = drive;
1618         cdi->ops = &ide_cdrom_dops;
1619
1620         if (ide_cdrom_get_capabilities(drive, buf))
1621                 return 0;
1622
1623         if ((buf[8 + 6] & 0x01) == 0)
1624                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1625         if (buf[8 + 6] & 0x08)
1626                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1627         if (buf[8 + 3] & 0x01)
1628                 cdi->mask &= ~CDC_CD_R;
1629         if (buf[8 + 3] & 0x02)
1630                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1631         if (buf[8 + 2] & 0x38)
1632                 cdi->mask &= ~CDC_DVD;
1633         if (buf[8 + 3] & 0x20)
1634                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1635         if (buf[8 + 3] & 0x10)
1636                 cdi->mask &= ~CDC_DVD_R;
1637         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1638                 cdi->mask &= ~CDC_PLAY_AUDIO;
1639
1640         mechtype = buf[8 + 6] >> 5;
1641         if (mechtype == mechtype_caddy ||
1642             mechtype == mechtype_popup ||
1643             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1644                 cdi->mask |= CDC_CLOSE_TRAY;
1645
1646         if (cdi->sanyo_slot > 0) {
1647                 cdi->mask &= ~CDC_SELECT_DISC;
1648                 nslots = 3;
1649         } else if (mechtype == mechtype_individual_changer ||
1650                    mechtype == mechtype_cartridge_changer) {
1651                 nslots = cdrom_number_of_slots(cdi);
1652                 if (nslots > 1)
1653                         cdi->mask &= ~CDC_SELECT_DISC;
1654         }
1655
1656         ide_cdrom_update_speed(drive, buf);
1657
1658         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1659
1660         /* don't print speed if the drive reported 0 */
1661         if (cd->max_speed)
1662                 printk(KERN_CONT " %dX", cd->max_speed);
1663
1664         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1665
1666         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1667                 printk(KERN_CONT " DVD%s%s",
1668                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1669                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1670
1671         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1672                 printk(KERN_CONT " CD%s%s",
1673                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1674                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1675
1676         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1677                 printk(KERN_CONT " changer w/%d slots", nslots);
1678         else
1679                 printk(KERN_CONT " drive");
1680
1681         printk(KERN_CONT ", %dkB Cache\n",
1682                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1683
1684         return nslots;
1685 }
1686
1687 /* standard prep_rq_fn that builds 10 byte cmds */
1688 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1689 {
1690         int hard_sect = queue_hardsect_size(q);
1691         long block = (long)rq->hard_sector / (hard_sect >> 9);
1692         unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1693
1694         memset(rq->cmd, 0, BLK_MAX_CDB);
1695
1696         if (rq_data_dir(rq) == READ)
1697                 rq->cmd[0] = GPCMD_READ_10;
1698         else
1699                 rq->cmd[0] = GPCMD_WRITE_10;
1700
1701         /*
1702          * fill in lba
1703          */
1704         rq->cmd[2] = (block >> 24) & 0xff;
1705         rq->cmd[3] = (block >> 16) & 0xff;
1706         rq->cmd[4] = (block >>  8) & 0xff;
1707         rq->cmd[5] = block & 0xff;
1708
1709         /*
1710          * and transfer length
1711          */
1712         rq->cmd[7] = (blocks >> 8) & 0xff;
1713         rq->cmd[8] = blocks & 0xff;
1714         rq->cmd_len = 10;
1715         return BLKPREP_OK;
1716 }
1717
1718 /*
1719  * Most of the SCSI commands are supported directly by ATAPI devices.
1720  * This transform handles the few exceptions.
1721  */
1722 static int ide_cdrom_prep_pc(struct request *rq)
1723 {
1724         u8 *c = rq->cmd;
1725
1726         /* transform 6-byte read/write commands to the 10-byte version */
1727         if (c[0] == READ_6 || c[0] == WRITE_6) {
1728                 c[8] = c[4];
1729                 c[5] = c[3];
1730                 c[4] = c[2];
1731                 c[3] = c[1] & 0x1f;
1732                 c[2] = 0;
1733                 c[1] &= 0xe0;
1734                 c[0] += (READ_10 - READ_6);
1735                 rq->cmd_len = 10;
1736                 return BLKPREP_OK;
1737         }
1738
1739         /*
1740          * it's silly to pretend we understand 6-byte sense commands, just
1741          * reject with ILLEGAL_REQUEST and the caller should take the
1742          * appropriate action
1743          */
1744         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1745                 rq->errors = ILLEGAL_REQUEST;
1746                 return BLKPREP_KILL;
1747         }
1748
1749         return BLKPREP_OK;
1750 }
1751
1752 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1753 {
1754         if (blk_fs_request(rq))
1755                 return ide_cdrom_prep_fs(q, rq);
1756         else if (blk_pc_request(rq))
1757                 return ide_cdrom_prep_pc(rq);
1758
1759         return 0;
1760 }
1761
1762 struct cd_list_entry {
1763         const char      *id_model;
1764         const char      *id_firmware;
1765         unsigned int    cd_flags;
1766 };
1767
1768 #ifdef CONFIG_IDE_PROC_FS
1769 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1770 {
1771         unsigned long capacity, sectors_per_frame;
1772
1773         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1774                 return 0;
1775
1776         return capacity * sectors_per_frame;
1777 }
1778
1779 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1780                                         int count, int *eof, void *data)
1781 {
1782         ide_drive_t *drive = data;
1783         int len;
1784
1785         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1786         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1787 }
1788
1789 static ide_proc_entry_t idecd_proc[] = {
1790         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1791         { NULL, 0, NULL, NULL }
1792 };
1793
1794 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1795 {
1796         return idecd_proc;
1797 }
1798
1799 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1800 {
1801         return NULL;
1802 }
1803 #endif
1804
1805 static const struct cd_list_entry ide_cd_quirks_list[] = {
1806         /* Limit transfer size per interrupt. */
1807         { "SAMSUNG CD-ROM SCR-2430", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1808         { "SAMSUNG CD-ROM SCR-2432", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1809         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1810         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1811         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1812         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1813                                              IDE_AFLAG_PRE_ATAPI12,          },
1814         /* Vertos 300, some versions of this drive like to talk BCD. */
1815         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1816         /* Vertos 600 ESD. */
1817         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1818         /*
1819          * Sanyo 3 CD changer uses a non-standard command for CD changing
1820          * (by default standard ATAPI support for CD changers is used).
1821          */
1822         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1823         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1824         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1825         /* Stingray 8X CD-ROM. */
1826         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1827         /*
1828          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1829          * mode sense page capabilities size, but older drives break.
1830          */
1831         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1832         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1833         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1834         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1835         /*
1836          * Some drives used by Apple don't advertise audio play
1837          * but they do support reading TOC & audio datas.
1838          */
1839         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1840         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1841         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1842         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1843         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1844         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1845         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1846         { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1847         { NULL, NULL, 0 }
1848 };
1849
1850 static unsigned int ide_cd_flags(u16 *id)
1851 {
1852         const struct cd_list_entry *cle = ide_cd_quirks_list;
1853
1854         while (cle->id_model) {
1855                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1856                     (cle->id_firmware == NULL ||
1857                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1858                         return cle->cd_flags;
1859                 cle++;
1860         }
1861
1862         return 0;
1863 }
1864
1865 static int ide_cdrom_setup(ide_drive_t *drive)
1866 {
1867         struct cdrom_info *cd = drive->driver_data;
1868         struct cdrom_device_info *cdi = &cd->devinfo;
1869         u16 *id = drive->id;
1870         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1871         int nslots;
1872
1873         ide_debug_log(IDE_DBG_PROBE, "Call %s\n", __func__);
1874
1875         blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1876         blk_queue_dma_alignment(drive->queue, 31);
1877         blk_queue_update_dma_pad(drive->queue, 15);
1878         drive->queue->unplug_delay = (1 * HZ) / 1000;
1879         if (!drive->queue->unplug_delay)
1880                 drive->queue->unplug_delay = 1;
1881
1882         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1883         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1884
1885         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1886             fw_rev[4] == '1' && fw_rev[6] <= '2')
1887                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1888                                      IDE_AFLAG_TOCADDR_AS_BCD);
1889         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1890                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1891                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1892         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1893                 /* 3 => use CD in slot 0 */
1894                 cdi->sanyo_slot = 3;
1895
1896         nslots = ide_cdrom_probe_capabilities(drive);
1897
1898         /* set correct block size */
1899         blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1900
1901         if (ide_cdrom_register(drive, nslots)) {
1902                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1903                                 " cdrom driver.\n", drive->name, __func__);
1904                 cd->devinfo.handle = NULL;
1905                 return 1;
1906         }
1907
1908         ide_proc_register_driver(drive, cd->driver);
1909         return 0;
1910 }
1911
1912 static void ide_cd_remove(ide_drive_t *drive)
1913 {
1914         struct cdrom_info *info = drive->driver_data;
1915
1916         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1917
1918         ide_proc_unregister_driver(drive, info->driver);
1919
1920         del_gendisk(info->disk);
1921
1922         ide_cd_put(info);
1923 }
1924
1925 static void ide_cd_release(struct kref *kref)
1926 {
1927         struct cdrom_info *info = to_ide_drv(kref, cdrom_info);
1928         struct cdrom_device_info *devinfo = &info->devinfo;
1929         ide_drive_t *drive = info->drive;
1930         struct gendisk *g = info->disk;
1931
1932         ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1933
1934         kfree(info->toc);
1935         if (devinfo->handle == drive)
1936                 unregister_cdrom(devinfo);
1937         drive->driver_data = NULL;
1938         blk_queue_prep_rq(drive->queue, NULL);
1939         g->private_data = NULL;
1940         put_disk(g);
1941         kfree(info);
1942 }
1943
1944 static int ide_cd_probe(ide_drive_t *);
1945
1946 static ide_driver_t ide_cdrom_driver = {
1947         .gen_driver = {
1948                 .owner          = THIS_MODULE,
1949                 .name           = "ide-cdrom",
1950                 .bus            = &ide_bus_type,
1951         },
1952         .probe                  = ide_cd_probe,
1953         .remove                 = ide_cd_remove,
1954         .version                = IDECD_VERSION,
1955         .do_request             = ide_cd_do_request,
1956         .end_request            = ide_end_request,
1957         .error                  = __ide_error,
1958 #ifdef CONFIG_IDE_PROC_FS
1959         .proc_entries           = ide_cd_proc_entries,
1960         .proc_devsets           = ide_cd_proc_devsets,
1961 #endif
1962 };
1963
1964 static int idecd_open(struct block_device *bdev, fmode_t mode)
1965 {
1966         struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1967         int rc = -ENOMEM;
1968
1969         if (!info)
1970                 return -ENXIO;
1971
1972         rc = cdrom_open(&info->devinfo, bdev, mode);
1973
1974         if (rc < 0)
1975                 ide_cd_put(info);
1976
1977         return rc;
1978 }
1979
1980 static int idecd_release(struct gendisk *disk, fmode_t mode)
1981 {
1982         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1983
1984         cdrom_release(&info->devinfo, mode);
1985
1986         ide_cd_put(info);
1987
1988         return 0;
1989 }
1990
1991 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1992 {
1993         struct packet_command cgc;
1994         char buffer[16];
1995         int stat;
1996         char spindown;
1997
1998         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1999                 return -EFAULT;
2000
2001         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2002
2003         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2004         if (stat)
2005                 return stat;
2006
2007         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
2008         return cdrom_mode_select(cdi, &cgc);
2009 }
2010
2011 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2012 {
2013         struct packet_command cgc;
2014         char buffer[16];
2015         int stat;
2016         char spindown;
2017
2018         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2019
2020         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2021         if (stat)
2022                 return stat;
2023
2024         spindown = buffer[11] & 0x0f;
2025         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
2026                 return -EFAULT;
2027         return 0;
2028 }
2029
2030 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
2031                         unsigned int cmd, unsigned long arg)
2032 {
2033         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
2034         int err;
2035
2036         switch (cmd) {
2037         case CDROMSETSPINDOWN:
2038                 return idecd_set_spindown(&info->devinfo, arg);
2039         case CDROMGETSPINDOWN:
2040                 return idecd_get_spindown(&info->devinfo, arg);
2041         default:
2042                 break;
2043         }
2044
2045         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
2046         if (err == -EINVAL)
2047                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
2048
2049         return err;
2050 }
2051
2052 static int idecd_media_changed(struct gendisk *disk)
2053 {
2054         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2055         return cdrom_media_changed(&info->devinfo);
2056 }
2057
2058 static int idecd_revalidate_disk(struct gendisk *disk)
2059 {
2060         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2061         struct request_sense sense;
2062
2063         ide_cd_read_toc(info->drive, &sense);
2064
2065         return  0;
2066 }
2067
2068 static struct block_device_operations idecd_ops = {
2069         .owner                  = THIS_MODULE,
2070         .open                   = idecd_open,
2071         .release                = idecd_release,
2072         .locked_ioctl           = idecd_ioctl,
2073         .media_changed          = idecd_media_changed,
2074         .revalidate_disk        = idecd_revalidate_disk
2075 };
2076
2077 /* module options */
2078 static char *ignore;
2079 module_param(ignore, charp, 0400);
2080
2081 static unsigned long debug_mask;
2082 module_param(debug_mask, ulong, 0644);
2083
2084 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2085
2086 static int ide_cd_probe(ide_drive_t *drive)
2087 {
2088         struct cdrom_info *info;
2089         struct gendisk *g;
2090         struct request_sense sense;
2091
2092         ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->driver_req: %s, "
2093                       "drive->media: 0x%x\n", __func__, drive->driver_req,
2094                       drive->media);
2095
2096         if (!strstr("ide-cdrom", drive->driver_req))
2097                 goto failed;
2098
2099         if (drive->media != ide_cdrom && drive->media != ide_optical)
2100                 goto failed;
2101
2102         /* skip drives that we were told to ignore */
2103         if (ignore != NULL) {
2104                 if (strstr(ignore, drive->name)) {
2105                         printk(KERN_INFO PFX "ignoring drive %s\n",
2106                                          drive->name);
2107                         goto failed;
2108                 }
2109         }
2110
2111         drive->debug_mask = debug_mask;
2112
2113         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2114         if (info == NULL) {
2115                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
2116                                 drive->name);
2117                 goto failed;
2118         }
2119
2120         g = alloc_disk(1 << PARTN_BITS);
2121         if (!g)
2122                 goto out_free_cd;
2123
2124         ide_init_disk(g, drive);
2125
2126         kref_init(&info->kref);
2127
2128         info->drive = drive;
2129         info->driver = &ide_cdrom_driver;
2130         info->disk = g;
2131
2132         g->private_data = &info->driver;
2133
2134         drive->driver_data = info;
2135
2136         g->minors = 1;
2137         g->driverfs_dev = &drive->gendev;
2138         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2139         if (ide_cdrom_setup(drive)) {
2140                 ide_cd_release(&info->kref);
2141                 goto failed;
2142         }
2143
2144         ide_cd_read_toc(drive, &sense);
2145         g->fops = &idecd_ops;
2146         g->flags |= GENHD_FL_REMOVABLE;
2147         add_disk(g);
2148         return 0;
2149
2150 out_free_cd:
2151         kfree(info);
2152 failed:
2153         return -ENODEV;
2154 }
2155
2156 static void __exit ide_cdrom_exit(void)
2157 {
2158         driver_unregister(&ide_cdrom_driver.gen_driver);
2159 }
2160
2161 static int __init ide_cdrom_init(void)
2162 {
2163         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2164         return driver_register(&ide_cdrom_driver.gen_driver);
2165 }
2166
2167 MODULE_ALIAS("ide:*m-cdrom*");
2168 MODULE_ALIAS("ide-cd");
2169 module_init(ide_cdrom_init);
2170 module_exit(ide_cdrom_exit);
2171 MODULE_LICENSE("GPL");