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