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, 2007-2009  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.rst for usage information.
  13  *
  14  * Suggestions are welcome. Patches that work are more welcome though. ;-)
  15  *
  16  * Documentation:
  17  *      Mt. Fuji (SFF8090 version 4) and ATAPI (SFF-8020i rev 2.6) standards.
  18  *
  19  * For historical changelog please see:
  20  *      Documentation/ide/ChangeLog.ide-cd.1994-2004
  21  */
  22
  23 #define DRV_NAME "ide-cd"
  24 #define PFX DRV_NAME ": "
  25
  26 #define IDECD_VERSION "5.00"
  27
  28 #include <linux/compat.h>
  29 #include <linux/module.h>
  30 #include <linux/types.h>
  31 #include <linux/kernel.h>
  32 #include <linux/sched/task_stack.h>
  33 #include <linux/delay.h>
  34 #include <linux/timer.h>
  35 #include <linux/seq_file.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/io.h>
  49 #include <asm/byteorder.h>
  50 #include <linux/uaccess.h>
  51 #include <asm/unaligned.h>
  52
  53 #include "ide-cd.h"
  54
  55 static DEFINE_MUTEX(ide_cd_mutex);
  56 static DEFINE_MUTEX(idecd_ref_mutex);
  57
  58 static void ide_cd_release(struct device *);
  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                         get_device(&cd->dev);
  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         put_device(&cd->dev);
  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 {
 100         struct request_sense *sense = &drive->sense_data;
 101         int log = 0;
 102
 103         if (!sense || !rq || (rq->rq_flags & RQF_QUIET))
 104                 return 0;
 105
 106         ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
 107
 108         switch (sense->sense_key) {
 109         case NO_SENSE:
 110         case RECOVERED_ERROR:
 111                 break;
 112         case NOT_READY:
 113                 /*
 114                  * don't care about tray state messages for e.g. capacity
 115                  * commands or in-progress or becoming ready
 116                  */
 117                 if (sense->asc == 0x3a || sense->asc == 0x04)
 118                         break;
 119                 log = 1;
 120                 break;
 121         case ILLEGAL_REQUEST:
 122                 /*
 123                  * don't log START_STOP unit with LoEj set, since we cannot
 124                  * reliably check if drive can auto-close
 125                  */
 126                 if (scsi_req(rq)->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
 127                         break;
 128                 log = 1;
 129                 break;
 130         case UNIT_ATTENTION:
 131                 /*
 132                  * Make good and sure we've seen this potential media change.
 133                  * Some drives (i.e. Creative) fail to present the correct sense
 134                  * key in the error register.
 135                  */
 136                 cdrom_saw_media_change(drive);
 137                 break;
 138         default:
 139                 log = 1;
 140                 break;
 141         }
 142         return log;
 143 }
 144
 145 static void cdrom_analyze_sense_data(ide_drive_t *drive,
 146                                      struct request *failed_command)
 147 {
 148         struct request_sense *sense = &drive->sense_data;
 149         struct cdrom_info *info = drive->driver_data;
 150         unsigned long sector;
 151         unsigned long bio_sectors;
 152
 153         ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
 154                                      sense->error_code, sense->sense_key);
 155
 156         if (failed_command)
 157                 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
 158                                              failed_command->cmd[0]);
 159
 160         if (!cdrom_log_sense(drive, failed_command))
 161                 return;
 162
 163         /*
 164          * If a read toc is executed for a CD-R or CD-RW medium where the first
 165          * toc has not been recorded yet, it will fail with 05/24/00 (which is a
 166          * confusing error)
 167          */
 168         if (failed_command && scsi_req(failed_command)->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
 169                 if (sense->sense_key == 0x05 && sense->asc == 0x24)
 170                         return;
 171
 172         /* current error */
 173         if (sense->error_code == 0x70) {
 174                 switch (sense->sense_key) {
 175                 case MEDIUM_ERROR:
 176                 case VOLUME_OVERFLOW:
 177                 case ILLEGAL_REQUEST:
 178                         if (!sense->valid)
 179                                 break;
 180                         if (failed_command == NULL ||
 181                             blk_rq_is_passthrough(failed_command))
 182                                 break;
 183                         sector = (sense->information[0] << 24) |
 184                                  (sense->information[1] << 16) |
 185                                  (sense->information[2] <<  8) |
 186                                  (sense->information[3]);
 187
 188                         if (queue_logical_block_size(drive->queue) == 2048)
 189                                 /* device sector size is 2K */
 190                                 sector <<= 2;
 191
 192                         bio_sectors = max(bio_sectors(failed_command->bio), 4U);
 193                         sector &= ~(bio_sectors - 1);
 194
 195                         /*
 196                          * The SCSI specification allows for the value
 197                          * returned by READ CAPACITY to be up to 75 2K
 198                          * sectors past the last readable block.
 199                          * Therefore, if we hit a medium error within the
 200                          * last 75 2K sectors, we decrease the saved size
 201                          * value.
 202                          */
 203                         if (sector < get_capacity(info->disk) &&
 204                             drive->probed_capacity - sector < 4 * 75)
 205                                 set_capacity(info->disk, sector);
 206                 }
 207         }
 208
 209         ide_cd_log_error(drive->name, failed_command, sense);
 210 }
 211
 212 static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
 213 {
 214         /*
 215          * For ATA_PRIV_SENSE, "ide_req(rq)->special" points to the original
 216          * failed request.  Also, the sense data should be read
 217          * directly from rq which might be different from the original
 218          * sense buffer if it got copied during mapping.
 219          */
 220         struct request *failed = ide_req(rq)->special;
 221         void *sense = bio_data(rq->bio);
 222
 223         if (failed) {
 224                 /*
 225                  * Sense is always read into drive->sense_data, copy back to the
 226                  * original request.
 227                  */
 228                 memcpy(scsi_req(failed)->sense, sense, 18);
 229                 scsi_req(failed)->sense_len = scsi_req(rq)->sense_len;
 230                 cdrom_analyze_sense_data(drive, failed);
 231
 232                 if (ide_end_rq(drive, failed, BLK_STS_IOERR, blk_rq_bytes(failed)))
 233                         BUG();
 234         } else
 235                 cdrom_analyze_sense_data(drive, NULL);
 236 }
 237
 238
 239 /*
 240  * Allow the drive 5 seconds to recover; some devices will return NOT_READY
 241  * while flushing data from cache.
 242  *
 243  * returns: 0 failed (write timeout expired)
 244  *          1 success
 245  */
 246 static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
 247 {
 248
 249         struct cdrom_info *info = drive->driver_data;
 250
 251         if (!scsi_req(rq)->result)
 252                 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
 253
 254         scsi_req(rq)->result = 1;
 255
 256         if (time_after(jiffies, info->write_timeout))
 257                 return 0;
 258         else {
 259                 /*
 260                  * take a breather
 261                  */
 262                 blk_mq_requeue_request(rq, false);
 263                 blk_mq_delay_kick_requeue_list(drive->queue, 1);
 264                 return 1;
 265         }
 266 }
 267
 268 static void ide_cd_free_sense(ide_drive_t *drive)
 269 {
 270         if (!drive->sense_rq)
 271                 return;
 272
 273         blk_mq_free_request(drive->sense_rq);
 274         drive->sense_rq = NULL;
 275         drive->sense_rq_armed = false;
 276 }
 277
 278 /**
 279  * Returns:
 280  * 0: if the request should be continued.
 281  * 1: if the request will be going through error recovery.
 282  * 2: if the request should be ended.
 283  */
 284 static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 285 {
 286         ide_hwif_t *hwif = drive->hwif;
 287         struct request *rq = hwif->rq;
 288         int err, sense_key, do_end_request = 0;
 289
 290         /* get the IDE error register */
 291         err = ide_read_error(drive);
 292         sense_key = err >> 4;
 293
 294         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
 295                                   "stat 0x%x",
 296                                   rq->cmd[0], rq->cmd_type, err, stat);
 297
 298         if (ata_sense_request(rq)) {
 299                 /*
 300                  * We got an error trying to get sense info from the drive
 301                  * (probably while trying to recover from a former error).
 302                  * Just give up.
 303                  */
 304                 rq->rq_flags |= RQF_FAILED;
 305                 return 2;
 306         }
 307
 308         /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
 309         if (blk_rq_is_scsi(rq) && !scsi_req(rq)->result)
 310                 scsi_req(rq)->result = SAM_STAT_CHECK_CONDITION;
 311
 312         if (blk_noretry_request(rq))
 313                 do_end_request = 1;
 314
 315         switch (sense_key) {
 316         case NOT_READY:
 317                 if (req_op(rq) == REQ_OP_WRITE) {
 318                         if (ide_cd_breathe(drive, rq))
 319                                 return 1;
 320                 } else {
 321                         cdrom_saw_media_change(drive);
 322
 323                         if (!blk_rq_is_passthrough(rq) &&
 324                             !(rq->rq_flags & RQF_QUIET))
 325                                 printk(KERN_ERR PFX "%s: tray open\n",
 326                                         drive->name);
 327                 }
 328                 do_end_request = 1;
 329                 break;
 330         case UNIT_ATTENTION:
 331                 cdrom_saw_media_change(drive);
 332
 333                 if (blk_rq_is_passthrough(rq))
 334                         return 0;
 335
 336                 /*
 337                  * Arrange to retry the request but be sure to give up if we've
 338                  * retried too many times.
 339                  */
 340                 if (++scsi_req(rq)->result > ERROR_MAX)
 341                         do_end_request = 1;
 342                 break;
 343         case ILLEGAL_REQUEST:
 344                 /*
 345                  * Don't print error message for this condition -- SFF8090i
 346                  * indicates that 5/24/00 is the correct response to a request
 347                  * to close the tray if the drive doesn't have that capability.
 348                  *
 349                  * cdrom_log_sense() knows this!
 350                  */
 351                 if (scsi_req(rq)->cmd[0] == GPCMD_START_STOP_UNIT)
 352                         break;
 353                 fallthrough;
 354         case DATA_PROTECT:
 355                 /*
 356                  * No point in retrying after an illegal request or data
 357                  * protect error.
 358                  */
 359                 if (!(rq->rq_flags & RQF_QUIET))
 360                         ide_dump_status(drive, "command error", stat);
 361                 do_end_request = 1;
 362                 break;
 363         case MEDIUM_ERROR:
 364                 /*
 365                  * No point in re-trying a zillion times on a bad sector.
 366                  * If we got here the error is not correctable.
 367                  */
 368                 if (!(rq->rq_flags & RQF_QUIET))
 369                         ide_dump_status(drive, "media error "
 370                                         "(bad sector)", stat);
 371                 do_end_request = 1;
 372                 break;
 373         case BLANK_CHECK:
 374                 /* disk appears blank? */
 375                 if (!(rq->rq_flags & RQF_QUIET))
 376                         ide_dump_status(drive, "media error (blank)",
 377                                         stat);
 378                 do_end_request = 1;
 379                 break;
 380         default:
 381                 if (blk_rq_is_passthrough(rq))
 382                         break;
 383                 if (err & ~ATA_ABORTED) {
 384                         /* go to the default handler for other errors */
 385                         ide_error(drive, "cdrom_decode_status", stat);
 386                         return 1;
 387                 } else if (++scsi_req(rq)->result > ERROR_MAX)
 388                         /* we've racked up too many retries, abort */
 389                         do_end_request = 1;
 390         }
 391
 392         if (blk_rq_is_passthrough(rq)) {
 393                 rq->rq_flags |= RQF_FAILED;
 394                 do_end_request = 1;
 395         }
 396
 397         /*
 398          * End a request through request sense analysis when we have sense data.
 399          * We need this in order to perform end of media processing.
 400          */
 401         if (do_end_request)
 402                 goto end_request;
 403
 404         /* if we got a CHECK_CONDITION status, queue a request sense command */
 405         if (stat & ATA_ERR)
 406                 return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
 407         return 1;
 408
 409 end_request:
 410         if (stat & ATA_ERR) {
 411                 hwif->rq = NULL;
 412                 return ide_queue_sense_rq(drive, rq) ? 2 : 1;
 413         } else
 414                 return 2;
 415 }
 416
 417 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
 418 {
 419         struct request *rq = cmd->rq;
 420
 421         ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
 422
 423         /*
 424          * Some of the trailing request sense fields are optional,
 425          * and some drives don't send them.  Sigh.
 426          */
 427         if (scsi_req(rq)->cmd[0] == GPCMD_REQUEST_SENSE &&
 428             cmd->nleft > 0 && cmd->nleft <= 5)
 429                 cmd->nleft = 0;
 430 }
 431
 432 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 433                     int write, void *buffer, unsigned *bufflen,
 434                     struct scsi_sense_hdr *sshdr, int timeout,
 435                     req_flags_t rq_flags)
 436 {
 437         struct cdrom_info *info = drive->driver_data;
 438         struct scsi_sense_hdr local_sshdr;
 439         int retries = 10;
 440         bool failed;
 441
 442         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
 443                                   "rq_flags: 0x%x",
 444                                   cmd[0], write, timeout, rq_flags);
 445
 446         if (!sshdr)
 447                 sshdr = &local_sshdr;
 448
 449         /* start of retry loop */
 450         do {
 451                 struct request *rq;
 452                 int error;
 453                 bool delay = false;
 454
 455                 rq = blk_get_request(drive->queue,
 456                         write ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
 457                 memcpy(scsi_req(rq)->cmd, cmd, BLK_MAX_CDB);
 458                 ide_req(rq)->type = ATA_PRIV_PC;
 459                 rq->rq_flags |= rq_flags;
 460                 rq->timeout = timeout;
 461                 if (buffer) {
 462                         error = blk_rq_map_kern(drive->queue, rq, buffer,
 463                                                 *bufflen, GFP_NOIO);
 464                         if (error) {
 465                                 blk_put_request(rq);
 466                                 return error;
 467                         }
 468                 }
 469
 470                 blk_execute_rq(info->disk, rq, 0);
 471                 error = scsi_req(rq)->result ? -EIO : 0;
 472
 473                 if (buffer)
 474                         *bufflen = scsi_req(rq)->resid_len;
 475                 scsi_normalize_sense(scsi_req(rq)->sense,
 476                                      scsi_req(rq)->sense_len, sshdr);
 477
 478                 /*
 479                  * FIXME: we should probably abort/retry or something in case of
 480                  * failure.
 481                  */
 482                 failed = (rq->rq_flags & RQF_FAILED) != 0;
 483                 if (failed) {
 484                         /*
 485                          * The request failed.  Retry if it was due to a unit
 486                          * attention status (usually means media was changed).
 487                          */
 488                         if (sshdr->sense_key == UNIT_ATTENTION)
 489                                 cdrom_saw_media_change(drive);
 490                         else if (sshdr->sense_key == NOT_READY &&
 491                                  sshdr->asc == 4 && sshdr->ascq != 4) {
 492                                 /*
 493                                  * The drive is in the process of loading
 494                                  * a disk.  Retry, but wait a little to give
 495                                  * the drive time to complete the load.
 496                                  */
 497                                 delay = true;
 498                         } else {
 499                                 /* otherwise, don't retry */
 500                                 retries = 0;
 501                         }
 502                         --retries;
 503                 }
 504                 blk_put_request(rq);
 505                 if (delay)
 506                         ssleep(2);
 507         } while (failed && retries >= 0);
 508
 509         /* return an error if the command failed */
 510         return failed ? -EIO : 0;
 511 }
 512
 513 /*
 514  * returns true if rq has been completed
 515  */
 516 static bool ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 517 {
 518         unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
 519
 520         if (cmd->tf_flags & IDE_TFLAG_WRITE)
 521                 nr_bytes -= cmd->last_xfer_len;
 522
 523         if (nr_bytes > 0) {
 524                 ide_complete_rq(drive, BLK_STS_OK, nr_bytes);
 525                 return true;
 526         }
 527
 528         return false;
 529 }
 530
 531 /* standard prep_rq that builds 10 byte cmds */
 532 static bool ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
 533 {
 534         int hard_sect = queue_logical_block_size(q);
 535         long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
 536         unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
 537         struct scsi_request *req = scsi_req(rq);
 538
 539         if (rq_data_dir(rq) == READ)
 540                 req->cmd[0] = GPCMD_READ_10;
 541         else
 542                 req->cmd[0] = GPCMD_WRITE_10;
 543
 544         /*
 545          * fill in lba
 546          */
 547         req->cmd[2] = (block >> 24) & 0xff;
 548         req->cmd[3] = (block >> 16) & 0xff;
 549         req->cmd[4] = (block >>  8) & 0xff;
 550         req->cmd[5] = block & 0xff;
 551
 552         /*
 553          * and transfer length
 554          */
 555         req->cmd[7] = (blocks >> 8) & 0xff;
 556         req->cmd[8] = blocks & 0xff;
 557         req->cmd_len = 10;
 558         return true;
 559 }
 560
 561 /*
 562  * Most of the SCSI commands are supported directly by ATAPI devices.
 563  * This transform handles the few exceptions.
 564  */
 565 static bool ide_cdrom_prep_pc(struct request *rq)
 566 {
 567         u8 *c = scsi_req(rq)->cmd;
 568
 569         /* transform 6-byte read/write commands to the 10-byte version */
 570         if (c[0] == READ_6 || c[0] == WRITE_6) {
 571                 c[8] = c[4];
 572                 c[5] = c[3];
 573                 c[4] = c[2];
 574                 c[3] = c[1] & 0x1f;
 575                 c[2] = 0;
 576                 c[1] &= 0xe0;
 577                 c[0] += (READ_10 - READ_6);
 578                 scsi_req(rq)->cmd_len = 10;
 579                 return true;
 580         }
 581
 582         /*
 583          * it's silly to pretend we understand 6-byte sense commands, just
 584          * reject with ILLEGAL_REQUEST and the caller should take the
 585          * appropriate action
 586          */
 587         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
 588                 scsi_req(rq)->result = ILLEGAL_REQUEST;
 589                 return false;
 590         }
 591
 592         return true;
 593 }
 594
 595 static bool ide_cdrom_prep_rq(ide_drive_t *drive, struct request *rq)
 596 {
 597         if (!blk_rq_is_passthrough(rq)) {
 598                 scsi_req_init(scsi_req(rq));
 599
 600                 return ide_cdrom_prep_fs(drive->queue, rq);
 601         } else if (blk_rq_is_scsi(rq))
 602                 return ide_cdrom_prep_pc(rq);
 603
 604         return true;
 605 }
 606
 607 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 608 {
 609         ide_hwif_t *hwif = drive->hwif;
 610         struct ide_cmd *cmd = &hwif->cmd;
 611         struct request *rq = hwif->rq;
 612         ide_expiry_t *expiry = NULL;
 613         int dma_error = 0, dma, thislen, uptodate = 0;
 614         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
 615         int sense = ata_sense_request(rq);
 616         unsigned int timeout;
 617         u16 len;
 618         u8 ireason, stat;
 619
 620         ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
 621
 622         /* check for errors */
 623         dma = drive->dma;
 624         if (dma) {
 625                 drive->dma = 0;
 626                 drive->waiting_for_dma = 0;
 627                 dma_error = hwif->dma_ops->dma_end(drive);
 628                 ide_dma_unmap_sg(drive, cmd);
 629                 if (dma_error) {
 630                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 631                                         write ? "write" : "read");
 632                         ide_dma_off(drive);
 633                 }
 634         }
 635
 636         /* check status */
 637         stat = hwif->tp_ops->read_status(hwif);
 638
 639         if (!OK_STAT(stat, 0, BAD_R_STAT)) {
 640                 rc = cdrom_decode_status(drive, stat);
 641                 if (rc) {
 642                         if (rc == 2)
 643                                 goto out_end;
 644                         return ide_stopped;
 645                 }
 646         }
 647
 648         /* using dma, transfer is complete now */
 649         if (dma) {
 650                 if (dma_error)
 651                         return ide_error(drive, "dma error", stat);
 652                 uptodate = 1;
 653                 goto out_end;
 654         }
 655
 656         ide_read_bcount_and_ireason(drive, &len, &ireason);
 657
 658         thislen = !blk_rq_is_passthrough(rq) ? len : cmd->nleft;
 659         if (thislen > len)
 660                 thislen = len;
 661
 662         ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
 663                                   stat, thislen);
 664
 665         /* If DRQ is clear, the command has completed. */
 666         if ((stat & ATA_DRQ) == 0) {
 667                 switch (req_op(rq)) {
 668                 default:
 669                         /*
 670                          * If we're not done reading/writing, complain.
 671                          * Otherwise, complete the command normally.
 672                          */
 673                         uptodate = 1;
 674                         if (cmd->nleft > 0) {
 675                                 printk(KERN_ERR PFX "%s: %s: data underrun "
 676                                         "(%u bytes)\n", drive->name, __func__,
 677                                         cmd->nleft);
 678                                 if (!write)
 679                                         rq->rq_flags |= RQF_FAILED;
 680                                 uptodate = 0;
 681                         }
 682                         goto out_end;
 683                 case REQ_OP_DRV_IN:
 684                 case REQ_OP_DRV_OUT:
 685                         ide_cd_request_sense_fixup(drive, cmd);
 686
 687                         uptodate = cmd->nleft ? 0 : 1;
 688
 689                         /*
 690                          * suck out the remaining bytes from the drive in an
 691                          * attempt to complete the data xfer. (see BZ#13399)
 692                          */
 693                         if (!(stat & ATA_ERR) && !uptodate && thislen) {
 694                                 ide_pio_bytes(drive, cmd, write, thislen);
 695                                 uptodate = cmd->nleft ? 0 : 1;
 696                         }
 697
 698                         if (!uptodate)
 699                                 rq->rq_flags |= RQF_FAILED;
 700                         goto out_end;
 701                 case REQ_OP_SCSI_IN:
 702                 case REQ_OP_SCSI_OUT:
 703                         goto out_end;
 704                 }
 705         }
 706
 707         rc = ide_check_ireason(drive, rq, len, ireason, write);
 708         if (rc)
 709                 goto out_end;
 710
 711         cmd->last_xfer_len = 0;
 712
 713         ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
 714                                   "ireason: 0x%x",
 715                                   rq->cmd_type, ireason);
 716
 717         /* transfer data */
 718         while (thislen > 0) {
 719                 int blen = min_t(int, thislen, cmd->nleft);
 720
 721                 if (cmd->nleft == 0)
 722                         break;
 723
 724                 ide_pio_bytes(drive, cmd, write, blen);
 725                 cmd->last_xfer_len += blen;
 726
 727                 thislen -= blen;
 728                 len -= blen;
 729
 730                 if (sense && write == 0)
 731                         scsi_req(rq)->sense_len += blen;
 732         }
 733
 734         /* pad, if necessary */
 735         if (len > 0) {
 736                 if (blk_rq_is_passthrough(rq) || write == 0)
 737                         ide_pad_transfer(drive, write, len);
 738                 else {
 739                         printk(KERN_ERR PFX "%s: confused, missing data\n",
 740                                 drive->name);
 741                         blk_dump_rq_flags(rq, "cdrom_newpc_intr");
 742                 }
 743         }
 744
 745         switch (req_op(rq)) {
 746         case REQ_OP_SCSI_IN:
 747         case REQ_OP_SCSI_OUT:
 748                 timeout = rq->timeout;
 749                 break;
 750         case REQ_OP_DRV_IN:
 751         case REQ_OP_DRV_OUT:
 752                 expiry = ide_cd_expiry;
 753                 fallthrough;
 754         default:
 755                 timeout = ATAPI_WAIT_PC;
 756                 break;
 757         }
 758
 759         hwif->expiry = expiry;
 760         ide_set_handler(drive, cdrom_newpc_intr, timeout);
 761         return ide_started;
 762
 763 out_end:
 764         if (blk_rq_is_scsi(rq) && rc == 0) {
 765                 scsi_req(rq)->resid_len = 0;
 766                 blk_mq_end_request(rq, BLK_STS_OK);
 767                 hwif->rq = NULL;
 768         } else {
 769                 if (sense && uptodate)
 770                         ide_cd_complete_failed_rq(drive, rq);
 771
 772                 if (!blk_rq_is_passthrough(rq)) {
 773                         if (cmd->nleft == 0)
 774                                 uptodate = 1;
 775                 } else {
 776                         if (uptodate <= 0 && scsi_req(rq)->result == 0)
 777                                 scsi_req(rq)->result = -EIO;
 778                 }
 779
 780                 if (uptodate == 0 && rq->bio)
 781                         if (ide_cd_error_cmd(drive, cmd))
 782                                 return ide_stopped;
 783
 784                 /* make sure it's fully ended */
 785                 if (blk_rq_is_passthrough(rq)) {
 786                         scsi_req(rq)->resid_len -= cmd->nbytes - cmd->nleft;
 787                         if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
 788                                 scsi_req(rq)->resid_len += cmd->last_xfer_len;
 789                 }
 790
 791                 ide_complete_rq(drive, uptodate ? BLK_STS_OK : BLK_STS_IOERR, blk_rq_bytes(rq));
 792
 793                 if (sense && rc == 2)
 794                         ide_error(drive, "request sense failure", stat);
 795         }
 796
 797         ide_cd_free_sense(drive);
 798         return ide_stopped;
 799 }
 800
 801 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 802 {
 803         struct cdrom_info *cd = drive->driver_data;
 804         struct request_queue *q = drive->queue;
 805         int write = rq_data_dir(rq) == WRITE;
 806         unsigned short sectors_per_frame =
 807                 queue_logical_block_size(q) >> SECTOR_SHIFT;
 808
 809         ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
 810                                   "secs_per_frame: %u",
 811                                   rq->cmd[0], rq->cmd_flags, sectors_per_frame);
 812
 813         if (write) {
 814                 /* disk has become write protected */
 815                 if (get_disk_ro(cd->disk))
 816                         return ide_stopped;
 817         } else {
 818                 /*
 819                  * We may be retrying this request after an error.  Fix up any
 820                  * weirdness which might be present in the request packet.
 821                  */
 822                 ide_cdrom_prep_rq(drive, rq);
 823         }
 824
 825         /* fs requests *must* be hardware frame aligned */
 826         if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
 827             (blk_rq_pos(rq) & (sectors_per_frame - 1)))
 828                 return ide_stopped;
 829
 830         /* use DMA, if possible */
 831         drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 832
 833         if (write)
 834                 cd->devinfo.media_written = 1;
 835
 836         rq->timeout = ATAPI_WAIT_PC;
 837
 838         return ide_started;
 839 }
 840
 841 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
 842 {
 843
 844         ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
 845                                   rq->cmd[0], rq->cmd_type);
 846
 847         if (blk_rq_is_scsi(rq))
 848                 rq->rq_flags |= RQF_QUIET;
 849         else
 850                 rq->rq_flags &= ~RQF_FAILED;
 851
 852         drive->dma = 0;
 853
 854         /* sg request */
 855         if (rq->bio) {
 856                 struct request_queue *q = drive->queue;
 857                 char *buf = bio_data(rq->bio);
 858                 unsigned int alignment;
 859
 860                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 861
 862                 /*
 863                  * check if dma is safe
 864                  *
 865                  * NOTE! The "len" and "addr" checks should possibly have
 866                  * separate masks.
 867                  */
 868                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
 869                 if ((unsigned long)buf & alignment
 870                     || blk_rq_bytes(rq) & q->dma_pad_mask
 871                     || object_is_on_stack(buf))
 872                         drive->dma = 0;
 873         }
 874 }
 875
 876 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
 877                                         sector_t block)
 878 {
 879         struct ide_cmd cmd;
 880         int uptodate = 0;
 881         unsigned int nsectors;
 882
 883         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
 884                                   rq->cmd[0], (unsigned long long)block);
 885
 886         if (drive->debug_mask & IDE_DBG_RQ)
 887                 blk_dump_rq_flags(rq, "ide_cd_do_request");
 888
 889         switch (req_op(rq)) {
 890         default:
 891                 if (cdrom_start_rw(drive, rq) == ide_stopped)
 892                         goto out_end;
 893                 break;
 894         case REQ_OP_SCSI_IN:
 895         case REQ_OP_SCSI_OUT:
 896         handle_pc:
 897                 if (!rq->timeout)
 898                         rq->timeout = ATAPI_WAIT_PC;
 899                 cdrom_do_block_pc(drive, rq);
 900                 break;
 901         case REQ_OP_DRV_IN:
 902         case REQ_OP_DRV_OUT:
 903                 switch (ide_req(rq)->type) {
 904                 case ATA_PRIV_MISC:
 905                         /* right now this can only be a reset... */
 906                         uptodate = 1;
 907                         goto out_end;
 908                 case ATA_PRIV_SENSE:
 909                 case ATA_PRIV_PC:
 910                         goto handle_pc;
 911                 default:
 912                         BUG();
 913                 }
 914         }
 915
 916         /* prepare sense request for this command */
 917         ide_prep_sense(drive, rq);
 918
 919         memset(&cmd, 0, sizeof(cmd));
 920
 921         if (rq_data_dir(rq))
 922                 cmd.tf_flags |= IDE_TFLAG_WRITE;
 923
 924         cmd.rq = rq;
 925
 926         if (!blk_rq_is_passthrough(rq) || blk_rq_bytes(rq)) {
 927                 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
 928                 ide_map_sg(drive, &cmd);
 929         }
 930
 931         return ide_issue_pc(drive, &cmd);
 932 out_end:
 933         nsectors = blk_rq_sectors(rq);
 934
 935         if (nsectors == 0)
 936                 nsectors = 1;
 937
 938         ide_complete_rq(drive, uptodate ? BLK_STS_OK : BLK_STS_IOERR, nsectors << 9);
 939
 940         return ide_stopped;
 941 }
 942
 943 /*
 944  * Ioctl handling.
 945  *
 946  * Routines which queue packet commands take as a final argument a pointer to a
 947  * request_sense struct. If execution of the command results in an error with a
 948  * CHECK CONDITION status, this structure will be filled with the results of the
 949  * subsequent request sense command. The pointer can also be NULL, in which case
 950  * no sense information is returned.
 951  */
 952 static void msf_from_bcd(struct atapi_msf *msf)
 953 {
 954         msf->minute = bcd2bin(msf->minute);
 955         msf->second = bcd2bin(msf->second);
 956         msf->frame  = bcd2bin(msf->frame);
 957 }
 958
 959 int cdrom_check_status(ide_drive_t *drive, struct scsi_sense_hdr *sshdr)
 960 {
 961         struct cdrom_info *info = drive->driver_data;
 962         struct cdrom_device_info *cdi;
 963         unsigned char cmd[BLK_MAX_CDB];
 964
 965         ide_debug_log(IDE_DBG_FUNC, "enter");
 966
 967         if (!info)
 968                 return -EIO;
 969
 970         cdi = &info->devinfo;
 971
 972         memset(cmd, 0, BLK_MAX_CDB);
 973         cmd[0] = GPCMD_TEST_UNIT_READY;
 974
 975         /*
 976          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
 977          * instead of supporting the LOAD_UNLOAD opcode.
 978          */
 979         cmd[7] = cdi->sanyo_slot % 3;
 980
 981         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sshdr, 0, RQF_QUIET);
 982 }
 983
 984 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
 985                                unsigned long *sectors_per_frame)
 986 {
 987         struct {
 988                 __be32 lba;
 989                 __be32 blocklen;
 990         } capbuf;
 991
 992         int stat;
 993         unsigned char cmd[BLK_MAX_CDB];
 994         unsigned len = sizeof(capbuf);
 995         u32 blocklen;
 996
 997         ide_debug_log(IDE_DBG_FUNC, "enter");
 998
 999         memset(cmd, 0, BLK_MAX_CDB);
1000         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1001
1002         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, NULL, 0,
1003                                RQF_QUIET);
1004         if (stat)
1005                 return stat;
1006
1007         /*
1008          * Sanity check the given block size, in so far as making
1009          * sure the sectors_per_frame we give to the caller won't
1010          * end up being bogus.
1011          */
1012         blocklen = be32_to_cpu(capbuf.blocklen);
1013         blocklen = (blocklen >> SECTOR_SHIFT) << SECTOR_SHIFT;
1014         switch (blocklen) {
1015         case 512:
1016         case 1024:
1017         case 2048:
1018         case 4096:
1019                 break;
1020         default:
1021                 printk_once(KERN_ERR PFX "%s: weird block size %u; "
1022                                 "setting default block size to 2048\n",
1023                                 drive->name, blocklen);
1024                 blocklen = 2048;
1025                 break;
1026         }
1027
1028         *capacity = 1 + be32_to_cpu(capbuf.lba);
1029         *sectors_per_frame = blocklen >> SECTOR_SHIFT;
1030
1031         ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
1032                                      *capacity, *sectors_per_frame);
1033
1034         return 0;
1035 }
1036
1037 static int ide_cdrom_read_tocentry(ide_drive_t *drive, int trackno,
1038                 int msf_flag, int format, char *buf, int buflen)
1039 {
1040         unsigned char cmd[BLK_MAX_CDB];
1041
1042         ide_debug_log(IDE_DBG_FUNC, "enter");
1043
1044         memset(cmd, 0, BLK_MAX_CDB);
1045
1046         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1047         cmd[6] = trackno;
1048         cmd[7] = (buflen >> 8);
1049         cmd[8] = (buflen & 0xff);
1050         cmd[9] = (format << 6);
1051
1052         if (msf_flag)
1053                 cmd[1] = 2;
1054
1055         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, NULL, 0, RQF_QUIET);
1056 }
1057
1058 /* Try to read the entire TOC for the disk into our internal buffer. */
1059 int ide_cd_read_toc(ide_drive_t *drive)
1060 {
1061         int stat, ntracks, i;
1062         struct cdrom_info *info = drive->driver_data;
1063         struct cdrom_device_info *cdi = &info->devinfo;
1064         struct atapi_toc *toc = info->toc;
1065         struct {
1066                 struct atapi_toc_header hdr;
1067                 struct atapi_toc_entry  ent;
1068         } ms_tmp;
1069         long last_written;
1070         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1071
1072         ide_debug_log(IDE_DBG_FUNC, "enter");
1073
1074         if (toc == NULL) {
1075                 /* try to allocate space */
1076                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1077                 if (toc == NULL) {
1078                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1079                                         drive->name);
1080                         return -ENOMEM;
1081                 }
1082                 info->toc = toc;
1083         }
1084
1085         /*
1086          * Check to see if the existing data is still valid. If it is,
1087          * just return.
1088          */
1089         (void) cdrom_check_status(drive, NULL);
1090
1091         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1092                 return 0;
1093
1094         /* try to get the total cdrom capacity and sector size */
1095         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame);
1096         if (stat)
1097                 toc->capacity = 0x1fffff;
1098
1099         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1100         /* save a private copy of the TOC capacity for error handling */
1101         drive->probed_capacity = toc->capacity * sectors_per_frame;
1102
1103         blk_queue_logical_block_size(drive->queue,
1104                                      sectors_per_frame << SECTOR_SHIFT);
1105
1106         /* first read just the header, so we know how long the TOC is */
1107         stat = ide_cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1108                                     sizeof(struct atapi_toc_header));
1109         if (stat)
1110                 return stat;
1111
1112         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1113                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1114                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1115         }
1116
1117         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1118         if (ntracks <= 0)
1119                 return -EIO;
1120         if (ntracks > MAX_TRACKS)
1121                 ntracks = MAX_TRACKS;
1122
1123         /* now read the whole schmeer */
1124         stat = ide_cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1125                                   (char *)&toc->hdr,
1126                                    sizeof(struct atapi_toc_header) +
1127                                    (ntracks + 1) *
1128                                    sizeof(struct atapi_toc_entry));
1129
1130         if (stat && toc->hdr.first_track > 1) {
1131                 /*
1132                  * Cds with CDI tracks only don't have any TOC entries, despite
1133                  * of this the returned values are
1134                  * first_track == last_track = number of CDI tracks + 1,
1135                  * so that this case is indistinguishable from the same layout
1136                  * plus an additional audio track. If we get an error for the
1137                  * regular case, we assume a CDI without additional audio
1138                  * tracks. In this case the readable TOC is empty (CDI tracks
1139                  * are not included) and only holds the Leadout entry.
1140                  *
1141                  * Heiko Eißfeldt.
1142                  */
1143                 ntracks = 0;
1144                 stat = ide_cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1145                                            (char *)&toc->hdr,
1146                                            sizeof(struct atapi_toc_header) +
1147                                            (ntracks + 1) *
1148                                            sizeof(struct atapi_toc_entry));
1149                 if (stat)
1150                         return stat;
1151
1152                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1153                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1154                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1155                 } else {
1156                         toc->hdr.first_track = CDROM_LEADOUT;
1157                         toc->hdr.last_track = CDROM_LEADOUT;
1158                 }
1159         }
1160
1161         if (stat)
1162                 return stat;
1163
1164         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1165
1166         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1167                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1168                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1169         }
1170
1171         for (i = 0; i <= ntracks; i++) {
1172                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1173                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1174                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1175                         msf_from_bcd(&toc->ent[i].addr.msf);
1176                 }
1177                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1178                                                   toc->ent[i].addr.msf.second,
1179                                                   toc->ent[i].addr.msf.frame);
1180         }
1181
1182         if (toc->hdr.first_track != CDROM_LEADOUT) {
1183                 /* read the multisession information */
1184                 stat = ide_cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1185                                            sizeof(ms_tmp));
1186                 if (stat)
1187                         return stat;
1188
1189                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1190         } else {
1191                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1192                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1193                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1194         }
1195
1196         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1197                 /* re-read multisession information using MSF format */
1198                 stat = ide_cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1199                                            sizeof(ms_tmp));
1200                 if (stat)
1201                         return stat;
1202
1203                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1204                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1205                                                    ms_tmp.ent.addr.msf.second,
1206                                                    ms_tmp.ent.addr.msf.frame);
1207         }
1208
1209         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1210
1211         /* now try to get the total cdrom capacity */
1212         stat = cdrom_get_last_written(cdi, &last_written);
1213         if (!stat && (last_written > toc->capacity)) {
1214                 toc->capacity = last_written;
1215                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1216                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1217         }
1218
1219         /* Remember that we've read this stuff. */
1220         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1221
1222         return 0;
1223 }
1224
1225 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1226 {
1227         struct cdrom_info *info = drive->driver_data;
1228         struct cdrom_device_info *cdi = &info->devinfo;
1229         struct packet_command cgc;
1230         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1231
1232         ide_debug_log(IDE_DBG_FUNC, "enter");
1233
1234         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1235                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1236
1237         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1238         do {
1239                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1240                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1241                 if (!stat)
1242                         break;
1243         } while (--attempts);
1244         return stat;
1245 }
1246
1247 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1248 {
1249         struct cdrom_info *cd = drive->driver_data;
1250         u16 curspeed, maxspeed;
1251
1252         ide_debug_log(IDE_DBG_FUNC, "enter");
1253
1254         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1255                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1256                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1257         } else {
1258                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1259                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1260         }
1261
1262         ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1263                                      curspeed, maxspeed);
1264
1265         cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176);
1266         cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176);
1267 }
1268
1269 #define IDE_CD_CAPABILITIES \
1270         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1271          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1272          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1273          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1274          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1275
1276 static const struct cdrom_device_ops ide_cdrom_dops = {
1277         .open                   = ide_cdrom_open_real,
1278         .release                = ide_cdrom_release_real,
1279         .drive_status           = ide_cdrom_drive_status,
1280         .check_events           = ide_cdrom_check_events_real,
1281         .tray_move              = ide_cdrom_tray_move,
1282         .lock_door              = ide_cdrom_lock_door,
1283         .select_speed           = ide_cdrom_select_speed,
1284         .get_last_session       = ide_cdrom_get_last_session,
1285         .get_mcn                = ide_cdrom_get_mcn,
1286         .reset                  = ide_cdrom_reset,
1287         .audio_ioctl            = ide_cdrom_audio_ioctl,
1288         .capability             = IDE_CD_CAPABILITIES,
1289         .generic_packet         = ide_cdrom_packet,
1290 };
1291
1292 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1293 {
1294         struct cdrom_info *info = drive->driver_data;
1295         struct cdrom_device_info *devinfo = &info->devinfo;
1296
1297         ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1298
1299         devinfo->ops = &ide_cdrom_dops;
1300         devinfo->speed = info->current_speed;
1301         devinfo->capacity = nslots;
1302         devinfo->handle = drive;
1303         strcpy(devinfo->name, drive->name);
1304
1305         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1306                 devinfo->mask |= CDC_SELECT_SPEED;
1307
1308         return register_cdrom(info->disk, devinfo);
1309 }
1310
1311 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1312 {
1313         struct cdrom_info *cd = drive->driver_data;
1314         struct cdrom_device_info *cdi = &cd->devinfo;
1315         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1316         mechtype_t mechtype;
1317         int nslots = 1;
1318
1319         ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1320                                      drive->media, drive->atapi_flags);
1321
1322         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1323                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1324                      CDC_MO_DRIVE | CDC_RAM);
1325
1326         if (drive->media == ide_optical) {
1327                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1328                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1329                                 drive->name);
1330                 return nslots;
1331         }
1332
1333         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1334                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1335                 cdi->mask &= ~CDC_PLAY_AUDIO;
1336                 return nslots;
1337         }
1338
1339         /*
1340          * We have to cheat a little here. the packet will eventually be queued
1341          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1342          * Since this device hasn't been registered with the Uniform layer yet,
1343          * it can't do this. Same goes for cdi->ops.
1344          */
1345         cdi->handle = drive;
1346         cdi->ops = &ide_cdrom_dops;
1347
1348         if (ide_cdrom_get_capabilities(drive, buf))
1349                 return 0;
1350
1351         if ((buf[8 + 6] & 0x01) == 0)
1352                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1353         if (buf[8 + 6] & 0x08)
1354                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1355         if (buf[8 + 3] & 0x01)
1356                 cdi->mask &= ~CDC_CD_R;
1357         if (buf[8 + 3] & 0x02)
1358                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1359         if (buf[8 + 2] & 0x38)
1360                 cdi->mask &= ~CDC_DVD;
1361         if (buf[8 + 3] & 0x20)
1362                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1363         if (buf[8 + 3] & 0x10)
1364                 cdi->mask &= ~CDC_DVD_R;
1365         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1366                 cdi->mask &= ~CDC_PLAY_AUDIO;
1367
1368         mechtype = buf[8 + 6] >> 5;
1369         if (mechtype == mechtype_caddy ||
1370             mechtype == mechtype_popup ||
1371             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1372                 cdi->mask |= CDC_CLOSE_TRAY;
1373
1374         if (cdi->sanyo_slot > 0) {
1375                 cdi->mask &= ~CDC_SELECT_DISC;
1376                 nslots = 3;
1377         } else if (mechtype == mechtype_individual_changer ||
1378                    mechtype == mechtype_cartridge_changer) {
1379                 nslots = cdrom_number_of_slots(cdi);
1380                 if (nslots > 1)
1381                         cdi->mask &= ~CDC_SELECT_DISC;
1382         }
1383
1384         ide_cdrom_update_speed(drive, buf);
1385
1386         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1387
1388         /* don't print speed if the drive reported 0 */
1389         if (cd->max_speed)
1390                 printk(KERN_CONT " %dX", cd->max_speed);
1391
1392         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1393
1394         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1395                 printk(KERN_CONT " DVD%s%s",
1396                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1397                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1398
1399         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1400                 printk(KERN_CONT " CD%s%s",
1401                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1402                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1403
1404         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1405                 printk(KERN_CONT " changer w/%d slots", nslots);
1406         else
1407                 printk(KERN_CONT " drive");
1408
1409         printk(KERN_CONT ", %dkB Cache\n",
1410                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1411
1412         return nslots;
1413 }
1414
1415 struct cd_list_entry {
1416         const char      *id_model;
1417         const char      *id_firmware;
1418         unsigned int    cd_flags;
1419 };
1420
1421 #ifdef CONFIG_IDE_PROC_FS
1422 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1423 {
1424         unsigned long capacity, sectors_per_frame;
1425
1426         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame))
1427                 return 0;
1428
1429         return capacity * sectors_per_frame;
1430 }
1431
1432 static int idecd_capacity_proc_show(struct seq_file *m, void *v)
1433 {
1434         ide_drive_t *drive = m->private;
1435
1436         seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive));
1437         return 0;
1438 }
1439
1440 static ide_proc_entry_t idecd_proc[] = {
1441         { "capacity", S_IFREG|S_IRUGO, idecd_capacity_proc_show },
1442         {}
1443 };
1444
1445 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1446 {
1447         return idecd_proc;
1448 }
1449
1450 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1451 {
1452         return NULL;
1453 }
1454 #endif
1455
1456 static const struct cd_list_entry ide_cd_quirks_list[] = {
1457         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1458         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1459         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1460         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1461                                              IDE_AFLAG_PRE_ATAPI12,          },
1462         /* Vertos 300, some versions of this drive like to talk BCD. */
1463         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1464         /* Vertos 600 ESD. */
1465         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1466         /*
1467          * Sanyo 3 CD changer uses a non-standard command for CD changing
1468          * (by default standard ATAPI support for CD changers is used).
1469          */
1470         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1471         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1472         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1473         /* Stingray 8X CD-ROM. */
1474         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1475         /*
1476          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1477          * mode sense page capabilities size, but older drives break.
1478          */
1479         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1480         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1481         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1482         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1483         /*
1484          * Some drives used by Apple don't advertise audio play
1485          * but they do support reading TOC & audio datas.
1486          */
1487         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1488         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1489         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1490         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1491         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1492         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1493         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1494         { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1495         { NULL, NULL, 0 }
1496 };
1497
1498 static unsigned int ide_cd_flags(u16 *id)
1499 {
1500         const struct cd_list_entry *cle = ide_cd_quirks_list;
1501
1502         while (cle->id_model) {
1503                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1504                     (cle->id_firmware == NULL ||
1505                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1506                         return cle->cd_flags;
1507                 cle++;
1508         }
1509
1510         return 0;
1511 }
1512
1513 static int ide_cdrom_setup(ide_drive_t *drive)
1514 {
1515         struct cdrom_info *cd = drive->driver_data;
1516         struct cdrom_device_info *cdi = &cd->devinfo;
1517         struct request_queue *q = drive->queue;
1518         u16 *id = drive->id;
1519         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1520         int nslots;
1521
1522         ide_debug_log(IDE_DBG_PROBE, "enter");
1523
1524         drive->prep_rq = ide_cdrom_prep_rq;
1525         blk_queue_dma_alignment(q, 31);
1526         blk_queue_update_dma_pad(q, 15);
1527
1528         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1529         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1530
1531         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1532             fw_rev[4] == '1' && fw_rev[6] <= '2')
1533                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1534                                      IDE_AFLAG_TOCADDR_AS_BCD);
1535         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1536                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1537                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1538         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1539                 /* 3 => use CD in slot 0 */
1540                 cdi->sanyo_slot = 3;
1541
1542         nslots = ide_cdrom_probe_capabilities(drive);
1543
1544         blk_queue_logical_block_size(q, CD_FRAMESIZE);
1545
1546         if (ide_cdrom_register(drive, nslots)) {
1547                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1548                                 " cdrom driver.\n", drive->name, __func__);
1549                 cd->devinfo.handle = NULL;
1550                 return 1;
1551         }
1552
1553         ide_proc_register_driver(drive, cd->driver);
1554         return 0;
1555 }
1556
1557 static void ide_cd_remove(ide_drive_t *drive)
1558 {
1559         struct cdrom_info *info = drive->driver_data;
1560
1561         ide_debug_log(IDE_DBG_FUNC, "enter");
1562
1563         ide_proc_unregister_driver(drive, info->driver);
1564         device_del(&info->dev);
1565         del_gendisk(info->disk);
1566
1567         mutex_lock(&idecd_ref_mutex);
1568         put_device(&info->dev);
1569         mutex_unlock(&idecd_ref_mutex);
1570 }
1571
1572 static void ide_cd_release(struct device *dev)
1573 {
1574         struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1575         struct cdrom_device_info *devinfo = &info->devinfo;
1576         ide_drive_t *drive = info->drive;
1577         struct gendisk *g = info->disk;
1578
1579         ide_debug_log(IDE_DBG_FUNC, "enter");
1580
1581         kfree(info->toc);
1582         if (devinfo->handle == drive)
1583                 unregister_cdrom(devinfo);
1584         drive->driver_data = NULL;
1585         drive->prep_rq = NULL;
1586         g->private_data = NULL;
1587         put_disk(g);
1588         kfree(info);
1589 }
1590
1591 static int ide_cd_probe(ide_drive_t *);
1592
1593 static struct ide_driver ide_cdrom_driver = {
1594         .gen_driver = {
1595                 .owner          = THIS_MODULE,
1596                 .name           = "ide-cdrom",
1597                 .bus            = &ide_bus_type,
1598         },
1599         .probe                  = ide_cd_probe,
1600         .remove                 = ide_cd_remove,
1601         .version                = IDECD_VERSION,
1602         .do_request             = ide_cd_do_request,
1603 #ifdef CONFIG_IDE_PROC_FS
1604         .proc_entries           = ide_cd_proc_entries,
1605         .proc_devsets           = ide_cd_proc_devsets,
1606 #endif
1607 };
1608
1609 static int idecd_open(struct block_device *bdev, fmode_t mode)
1610 {
1611         struct cdrom_info *info;
1612         int rc = -ENXIO;
1613
1614         if (bdev_check_media_change(bdev)) {
1615                 info = ide_drv_g(bdev->bd_disk, cdrom_info);
1616
1617                 ide_cd_read_toc(info->drive);
1618         }
1619
1620         mutex_lock(&ide_cd_mutex);
1621         info = ide_cd_get(bdev->bd_disk);
1622         if (!info)
1623                 goto out;
1624
1625         rc = cdrom_open(&info->devinfo, bdev, mode);
1626         if (rc < 0)
1627                 ide_cd_put(info);
1628 out:
1629         mutex_unlock(&ide_cd_mutex);
1630         return rc;
1631 }
1632
1633 static void idecd_release(struct gendisk *disk, fmode_t mode)
1634 {
1635         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1636
1637         mutex_lock(&ide_cd_mutex);
1638         cdrom_release(&info->devinfo, mode);
1639
1640         ide_cd_put(info);
1641         mutex_unlock(&ide_cd_mutex);
1642 }
1643
1644 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1645 {
1646         struct packet_command cgc;
1647         char buffer[16];
1648         int stat;
1649         char spindown;
1650
1651         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1652                 return -EFAULT;
1653
1654         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1655
1656         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1657         if (stat)
1658                 return stat;
1659
1660         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1661         return cdrom_mode_select(cdi, &cgc);
1662 }
1663
1664 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1665 {
1666         struct packet_command cgc;
1667         char buffer[16];
1668         int stat;
1669         char spindown;
1670
1671         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1672
1673         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1674         if (stat)
1675                 return stat;
1676
1677         spindown = buffer[11] & 0x0f;
1678         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1679                 return -EFAULT;
1680         return 0;
1681 }
1682
1683 static int idecd_locked_ioctl(struct block_device *bdev, fmode_t mode,
1684                         unsigned int cmd, unsigned long arg)
1685 {
1686         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1687         int err;
1688
1689         switch (cmd) {
1690         case CDROMSETSPINDOWN:
1691                 return idecd_set_spindown(&info->devinfo, arg);
1692         case CDROMGETSPINDOWN:
1693                 return idecd_get_spindown(&info->devinfo, arg);
1694         default:
1695                 break;
1696         }
1697
1698         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1699         if (err == -EINVAL)
1700                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1701
1702         return err;
1703 }
1704
1705 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1706                              unsigned int cmd, unsigned long arg)
1707 {
1708         int ret;
1709
1710         mutex_lock(&ide_cd_mutex);
1711         ret = idecd_locked_ioctl(bdev, mode, cmd, arg);
1712         mutex_unlock(&ide_cd_mutex);
1713
1714         return ret;
1715 }
1716
1717 static int idecd_locked_compat_ioctl(struct block_device *bdev, fmode_t mode,
1718                         unsigned int cmd, unsigned long arg)
1719 {
1720         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1721         void __user *argp = compat_ptr(arg);
1722         int err;
1723
1724         switch (cmd) {
1725         case CDROMSETSPINDOWN:
1726                 return idecd_set_spindown(&info->devinfo, (unsigned long)argp);
1727         case CDROMGETSPINDOWN:
1728                 return idecd_get_spindown(&info->devinfo, (unsigned long)argp);
1729         default:
1730                 break;
1731         }
1732
1733         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1734         if (err == -EINVAL)
1735                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd,
1736                                   (unsigned long)argp);
1737
1738         return err;
1739 }
1740
1741 static int idecd_compat_ioctl(struct block_device *bdev, fmode_t mode,
1742                              unsigned int cmd, unsigned long arg)
1743 {
1744         int ret;
1745
1746         mutex_lock(&ide_cd_mutex);
1747         ret = idecd_locked_compat_ioctl(bdev, mode, cmd, arg);
1748         mutex_unlock(&ide_cd_mutex);
1749
1750         return ret;
1751 }
1752
1753 static unsigned int idecd_check_events(struct gendisk *disk,
1754                                        unsigned int clearing)
1755 {
1756         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1757         return cdrom_check_events(&info->devinfo, clearing);
1758 }
1759
1760 static const struct block_device_operations idecd_ops = {
1761         .owner                  = THIS_MODULE,
1762         .open                   = idecd_open,
1763         .release                = idecd_release,
1764         .ioctl                  = idecd_ioctl,
1765         .compat_ioctl           = IS_ENABLED(CONFIG_COMPAT) ?
1766                                   idecd_compat_ioctl : NULL,
1767         .check_events           = idecd_check_events,
1768 };
1769
1770 /* module options */
1771 static unsigned long debug_mask;
1772 module_param(debug_mask, ulong, 0644);
1773
1774 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1775
1776 static int ide_cd_probe(ide_drive_t *drive)
1777 {
1778         struct cdrom_info *info;
1779         struct gendisk *g;
1780
1781         ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1782                                      drive->driver_req, drive->media);
1783
1784         if (!strstr("ide-cdrom", drive->driver_req))
1785                 goto failed;
1786
1787         if (drive->media != ide_cdrom && drive->media != ide_optical)
1788                 goto failed;
1789
1790         drive->debug_mask = debug_mask;
1791         drive->irq_handler = cdrom_newpc_intr;
1792
1793         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1794         if (info == NULL) {
1795                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1796                                 drive->name);
1797                 goto failed;
1798         }
1799
1800         g = alloc_disk(1 << PARTN_BITS);
1801         if (!g)
1802                 goto out_free_cd;
1803
1804         ide_init_disk(g, drive);
1805
1806         info->dev.parent = &drive->gendev;
1807         info->dev.release = ide_cd_release;
1808         dev_set_name(&info->dev, "%s", dev_name(&drive->gendev));
1809
1810         if (device_register(&info->dev))
1811                 goto out_free_disk;
1812
1813         info->drive = drive;
1814         info->driver = &ide_cdrom_driver;
1815         info->disk = g;
1816
1817         g->private_data = &info->driver;
1818
1819         drive->driver_data = info;
1820
1821         g->minors = 1;
1822         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1823         if (ide_cdrom_setup(drive)) {
1824                 put_device(&info->dev);
1825                 goto failed;
1826         }
1827
1828         ide_cd_read_toc(drive);
1829         g->fops = &idecd_ops;
1830         g->flags |= GENHD_FL_REMOVABLE | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
1831         g->events = DISK_EVENT_MEDIA_CHANGE;
1832         device_add_disk(&drive->gendev, g, NULL);
1833         return 0;
1834
1835 out_free_disk:
1836         put_disk(g);
1837 out_free_cd:
1838         kfree(info);
1839 failed:
1840         return -ENODEV;
1841 }
1842
1843 static void __exit ide_cdrom_exit(void)
1844 {
1845         driver_unregister(&ide_cdrom_driver.gen_driver);
1846 }
1847
1848 static int __init ide_cdrom_init(void)
1849 {
1850         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1851         return driver_register(&ide_cdrom_driver.gen_driver);
1852 }
1853
1854 MODULE_ALIAS("ide:*m-cdrom*");
1855 MODULE_ALIAS("ide-cd");
1856 module_init(ide_cdrom_init);
1857 module_exit(ide_cdrom_exit);
1858 MODULE_LICENSE("GPL");