linux/drivers/ide/ide-cd.c
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   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 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/module.h>
  29#include <linux/types.h>
  30#include <linux/kernel.h>
  31#include <linux/delay.h>
  32#include <linux/timer.h>
  33#include <linux/seq_file.h>
  34#include <linux/slab.h>
  35#include <linux/interrupt.h>
  36#include <linux/errno.h>
  37#include <linux/cdrom.h>
  38#include <linux/ide.h>
  39#include <linux/completion.h>
  40#include <linux/mutex.h>
  41#include <linux/bcd.h>
  42
  43/* For SCSI -> ATAPI command conversion */
  44#include <scsi/scsi.h>
  45
  46#include <linux/io.h>
  47#include <asm/byteorder.h>
  48#include <linux/uaccess.h>
  49#include <asm/unaligned.h>
  50
  51#include "ide-cd.h"
  52
  53static DEFINE_MUTEX(ide_cd_mutex);
  54static DEFINE_MUTEX(idecd_ref_mutex);
  55
  56static void ide_cd_release(struct device *);
  57
  58static struct cdrom_info *ide_cd_get(struct gendisk *disk)
  59{
  60        struct cdrom_info *cd = NULL;
  61
  62        mutex_lock(&idecd_ref_mutex);
  63        cd = ide_drv_g(disk, cdrom_info);
  64        if (cd) {
  65                if (ide_device_get(cd->drive))
  66                        cd = NULL;
  67                else
  68                        get_device(&cd->dev);
  69
  70        }
  71        mutex_unlock(&idecd_ref_mutex);
  72        return cd;
  73}
  74
  75static void ide_cd_put(struct cdrom_info *cd)
  76{
  77        ide_drive_t *drive = cd->drive;
  78
  79        mutex_lock(&idecd_ref_mutex);
  80        put_device(&cd->dev);
  81        ide_device_put(drive);
  82        mutex_unlock(&idecd_ref_mutex);
  83}
  84
  85/*
  86 * Generic packet command support and error handling routines.
  87 */
  88
  89/* Mark that we've seen a media change and invalidate our internal buffers. */
  90static void cdrom_saw_media_change(ide_drive_t *drive)
  91{
  92        drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
  93        drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
  94}
  95
  96static int cdrom_log_sense(ide_drive_t *drive, struct request *rq)
  97{
  98        struct request_sense *sense = &drive->sense_data;
  99        int log = 0;
 100
 101        if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
 102                return 0;
 103
 104        ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
 105
 106        switch (sense->sense_key) {
 107        case NO_SENSE:
 108        case RECOVERED_ERROR:
 109                break;
 110        case NOT_READY:
 111                /*
 112                 * don't care about tray state messages for e.g. capacity
 113                 * commands or in-progress or becoming ready
 114                 */
 115                if (sense->asc == 0x3a || sense->asc == 0x04)
 116                        break;
 117                log = 1;
 118                break;
 119        case ILLEGAL_REQUEST:
 120                /*
 121                 * don't log START_STOP unit with LoEj set, since we cannot
 122                 * reliably check if drive can auto-close
 123                 */
 124                if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
 125                        break;
 126                log = 1;
 127                break;
 128        case UNIT_ATTENTION:
 129                /*
 130                 * Make good and sure we've seen this potential media change.
 131                 * Some drives (i.e. Creative) fail to present the correct sense
 132                 * key in the error register.
 133                 */
 134                cdrom_saw_media_change(drive);
 135                break;
 136        default:
 137                log = 1;
 138                break;
 139        }
 140        return log;
 141}
 142
 143static void cdrom_analyze_sense_data(ide_drive_t *drive,
 144                                     struct request *failed_command)
 145{
 146        struct request_sense *sense = &drive->sense_data;
 147        struct cdrom_info *info = drive->driver_data;
 148        unsigned long sector;
 149        unsigned long bio_sectors;
 150
 151        ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
 152                                     sense->error_code, sense->sense_key);
 153
 154        if (failed_command)
 155                ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
 156                                             failed_command->cmd[0]);
 157
 158        if (!cdrom_log_sense(drive, failed_command))
 159                return;
 160
 161        /*
 162         * If a read toc is executed for a CD-R or CD-RW medium where the first
 163         * toc has not been recorded yet, it will fail with 05/24/00 (which is a
 164         * confusing error)
 165         */
 166        if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
 167                if (sense->sense_key == 0x05 && sense->asc == 0x24)
 168                        return;
 169
 170        /* current error */
 171        if (sense->error_code == 0x70) {
 172                switch (sense->sense_key) {
 173                case MEDIUM_ERROR:
 174                case VOLUME_OVERFLOW:
 175                case ILLEGAL_REQUEST:
 176                        if (!sense->valid)
 177                                break;
 178                        if (failed_command == NULL ||
 179                            failed_command->cmd_type != REQ_TYPE_FS)
 180                                break;
 181                        sector = (sense->information[0] << 24) |
 182                                 (sense->information[1] << 16) |
 183                                 (sense->information[2] <<  8) |
 184                                 (sense->information[3]);
 185
 186                        if (queue_logical_block_size(drive->queue) == 2048)
 187                                /* device sector size is 2K */
 188                                sector <<= 2;
 189
 190                        bio_sectors = max(bio_sectors(failed_command->bio), 4U);
 191                        sector &= ~(bio_sectors - 1);
 192
 193                        /*
 194                         * The SCSI specification allows for the value
 195                         * returned by READ CAPACITY to be up to 75 2K
 196                         * sectors past the last readable block.
 197                         * Therefore, if we hit a medium error within the
 198                         * last 75 2K sectors, we decrease the saved size
 199                         * value.
 200                         */
 201                        if (sector < get_capacity(info->disk) &&
 202                            drive->probed_capacity - sector < 4 * 75)
 203                                set_capacity(info->disk, sector);
 204                }
 205        }
 206
 207        ide_cd_log_error(drive->name, failed_command, sense);
 208}
 209
 210static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
 211{
 212        /*
 213         * For REQ_TYPE_SENSE, "rq->special" points to the original
 214         * failed request.  Also, the sense data should be read
 215         * directly from rq which might be different from the original
 216         * sense buffer if it got copied during mapping.
 217         */
 218        struct request *failed = (struct request *)rq->special;
 219        void *sense = bio_data(rq->bio);
 220
 221        if (failed) {
 222                if (failed->sense) {
 223                        /*
 224                         * Sense is always read into drive->sense_data.
 225                         * Copy back if the failed request has its
 226                         * sense pointer set.
 227                         */
 228                        memcpy(failed->sense, sense, 18);
 229                        failed->sense_len = rq->sense_len;
 230                }
 231                cdrom_analyze_sense_data(drive, failed);
 232
 233                if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
 234                        BUG();
 235        } else
 236                cdrom_analyze_sense_data(drive, NULL);
 237}
 238
 239
 240/*
 241 * Allow the drive 5 seconds to recover; some devices will return NOT_READY
 242 * while flushing data from cache.
 243 *
 244 * returns: 0 failed (write timeout expired)
 245 *          1 success
 246 */
 247static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
 248{
 249
 250        struct cdrom_info *info = drive->driver_data;
 251
 252        if (!rq->errors)
 253                info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
 254
 255        rq->errors = 1;
 256
 257        if (time_after(jiffies, info->write_timeout))
 258                return 0;
 259        else {
 260                /*
 261                 * take a breather
 262                 */
 263                blk_delay_queue(drive->queue, 1);
 264                return 1;
 265        }
 266}
 267
 268/**
 269 * Returns:
 270 * 0: if the request should be continued.
 271 * 1: if the request will be going through error recovery.
 272 * 2: if the request should be ended.
 273 */
 274static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 275{
 276        ide_hwif_t *hwif = drive->hwif;
 277        struct request *rq = hwif->rq;
 278        int err, sense_key, do_end_request = 0;
 279
 280        /* get the IDE error register */
 281        err = ide_read_error(drive);
 282        sense_key = err >> 4;
 283
 284        ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
 285                                  "stat 0x%x",
 286                                  rq->cmd[0], rq->cmd_type, err, stat);
 287
 288        if (rq->cmd_type == REQ_TYPE_SENSE) {
 289                /*
 290                 * We got an error trying to get sense info from the drive
 291                 * (probably while trying to recover from a former error).
 292                 * Just give up.
 293                 */
 294                rq->cmd_flags |= REQ_FAILED;
 295                return 2;
 296        }
 297
 298        /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
 299        if (rq->cmd_type == REQ_TYPE_BLOCK_PC && !rq->errors)
 300                rq->errors = SAM_STAT_CHECK_CONDITION;
 301
 302        if (blk_noretry_request(rq))
 303                do_end_request = 1;
 304
 305        switch (sense_key) {
 306        case NOT_READY:
 307                if (rq->cmd_type == REQ_TYPE_FS && rq_data_dir(rq) == WRITE) {
 308                        if (ide_cd_breathe(drive, rq))
 309                                return 1;
 310                } else {
 311                        cdrom_saw_media_change(drive);
 312
 313                        if (rq->cmd_type == REQ_TYPE_FS &&
 314                            !(rq->cmd_flags & REQ_QUIET))
 315                                printk(KERN_ERR PFX "%s: tray open\n",
 316                                        drive->name);
 317                }
 318                do_end_request = 1;
 319                break;
 320        case UNIT_ATTENTION:
 321                cdrom_saw_media_change(drive);
 322
 323                if (rq->cmd_type != REQ_TYPE_FS)
 324                        return 0;
 325
 326                /*
 327                 * Arrange to retry the request but be sure to give up if we've
 328                 * retried too many times.
 329                 */
 330                if (++rq->errors > ERROR_MAX)
 331                        do_end_request = 1;
 332                break;
 333        case ILLEGAL_REQUEST:
 334                /*
 335                 * Don't print error message for this condition -- SFF8090i
 336                 * indicates that 5/24/00 is the correct response to a request
 337                 * to close the tray if the drive doesn't have that capability.
 338                 *
 339                 * cdrom_log_sense() knows this!
 340                 */
 341                if (rq->cmd[0] == GPCMD_START_STOP_UNIT)
 342                        break;
 343                /* fall-through */
 344        case DATA_PROTECT:
 345                /*
 346                 * No point in retrying after an illegal request or data
 347                 * protect error.
 348                 */
 349                if (!(rq->cmd_flags & REQ_QUIET))
 350                        ide_dump_status(drive, "command error", stat);
 351                do_end_request = 1;
 352                break;
 353        case MEDIUM_ERROR:
 354                /*
 355                 * No point in re-trying a zillion times on a bad sector.
 356                 * If we got here the error is not correctable.
 357                 */
 358                if (!(rq->cmd_flags & REQ_QUIET))
 359                        ide_dump_status(drive, "media error "
 360                                        "(bad sector)", stat);
 361                do_end_request = 1;
 362                break;
 363        case BLANK_CHECK:
 364                /* disk appears blank? */
 365                if (!(rq->cmd_flags & REQ_QUIET))
 366                        ide_dump_status(drive, "media error (blank)",
 367                                        stat);
 368                do_end_request = 1;
 369                break;
 370        default:
 371                if (rq->cmd_type != REQ_TYPE_FS)
 372                        break;
 373                if (err & ~ATA_ABORTED) {
 374                        /* go to the default handler for other errors */
 375                        ide_error(drive, "cdrom_decode_status", stat);
 376                        return 1;
 377                } else if (++rq->errors > ERROR_MAX)
 378                        /* we've racked up too many retries, abort */
 379                        do_end_request = 1;
 380        }
 381
 382        if (rq->cmd_type != REQ_TYPE_FS) {
 383                rq->cmd_flags |= REQ_FAILED;
 384                do_end_request = 1;
 385        }
 386
 387        /*
 388         * End a request through request sense analysis when we have sense data.
 389         * We need this in order to perform end of media processing.
 390         */
 391        if (do_end_request)
 392                goto end_request;
 393
 394        /* if we got a CHECK_CONDITION status, queue a request sense command */
 395        if (stat & ATA_ERR)
 396                return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
 397        return 1;
 398
 399end_request:
 400        if (stat & ATA_ERR) {
 401                hwif->rq = NULL;
 402                return ide_queue_sense_rq(drive, rq) ? 2 : 1;
 403        } else
 404                return 2;
 405}
 406
 407static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
 408{
 409        struct request *rq = cmd->rq;
 410
 411        ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
 412
 413        /*
 414         * Some of the trailing request sense fields are optional,
 415         * and some drives don't send them.  Sigh.
 416         */
 417        if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 418            cmd->nleft > 0 && cmd->nleft <= 5)
 419                cmd->nleft = 0;
 420}
 421
 422int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 423                    int write, void *buffer, unsigned *bufflen,
 424                    struct request_sense *sense, int timeout,
 425                    unsigned int cmd_flags)
 426{
 427        struct cdrom_info *info = drive->driver_data;
 428        struct request_sense local_sense;
 429        int retries = 10;
 430        unsigned int flags = 0;
 431
 432        if (!sense)
 433                sense = &local_sense;
 434
 435        ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
 436                                  "cmd_flags: 0x%x",
 437                                  cmd[0], write, timeout, cmd_flags);
 438
 439        /* start of retry loop */
 440        do {
 441                struct request *rq;
 442                int error;
 443
 444                rq = blk_get_request(drive->queue, write, __GFP_WAIT);
 445
 446                memcpy(rq->cmd, cmd, BLK_MAX_CDB);
 447                rq->cmd_type = REQ_TYPE_ATA_PC;
 448                rq->sense = sense;
 449                rq->cmd_flags |= cmd_flags;
 450                rq->timeout = timeout;
 451                if (buffer) {
 452                        error = blk_rq_map_kern(drive->queue, rq, buffer,
 453                                                *bufflen, GFP_NOIO);
 454                        if (error) {
 455                                blk_put_request(rq);
 456                                return error;
 457                        }
 458                }
 459
 460                error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 461
 462                if (buffer)
 463                        *bufflen = rq->resid_len;
 464
 465                flags = rq->cmd_flags;
 466                blk_put_request(rq);
 467
 468                /*
 469                 * FIXME: we should probably abort/retry or something in case of
 470                 * failure.
 471                 */
 472                if (flags & REQ_FAILED) {
 473                        /*
 474                         * The request failed.  Retry if it was due to a unit
 475                         * attention status (usually means media was changed).
 476                         */
 477                        struct request_sense *reqbuf = sense;
 478
 479                        if (reqbuf->sense_key == UNIT_ATTENTION)
 480                                cdrom_saw_media_change(drive);
 481                        else if (reqbuf->sense_key == NOT_READY &&
 482                                 reqbuf->asc == 4 && reqbuf->ascq != 4) {
 483                                /*
 484                                 * The drive is in the process of loading
 485                                 * a disk.  Retry, but wait a little to give
 486                                 * the drive time to complete the load.
 487                                 */
 488                                ssleep(2);
 489                        } else {
 490                                /* otherwise, don't retry */
 491                                retries = 0;
 492                        }
 493                        --retries;
 494                }
 495
 496                /* end of retry loop */
 497        } while ((flags & REQ_FAILED) && retries >= 0);
 498
 499        /* return an error if the command failed */
 500        return (flags & REQ_FAILED) ? -EIO : 0;
 501}
 502
 503/*
 504 * returns true if rq has been completed
 505 */
 506static bool ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 507{
 508        unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
 509
 510        if (cmd->tf_flags & IDE_TFLAG_WRITE)
 511                nr_bytes -= cmd->last_xfer_len;
 512
 513        if (nr_bytes > 0) {
 514                ide_complete_rq(drive, 0, nr_bytes);
 515                return true;
 516        }
 517
 518        return false;
 519}
 520
 521static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 522{
 523        ide_hwif_t *hwif = drive->hwif;
 524        struct ide_cmd *cmd = &hwif->cmd;
 525        struct request *rq = hwif->rq;
 526        ide_expiry_t *expiry = NULL;
 527        int dma_error = 0, dma, thislen, uptodate = 0;
 528        int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
 529        int sense = (rq->cmd_type == REQ_TYPE_SENSE);
 530        unsigned int timeout;
 531        u16 len;
 532        u8 ireason, stat;
 533
 534        ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
 535
 536        /* check for errors */
 537        dma = drive->dma;
 538        if (dma) {
 539                drive->dma = 0;
 540                drive->waiting_for_dma = 0;
 541                dma_error = hwif->dma_ops->dma_end(drive);
 542                ide_dma_unmap_sg(drive, cmd);
 543                if (dma_error) {
 544                        printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 545                                        write ? "write" : "read");
 546                        ide_dma_off(drive);
 547                }
 548        }
 549
 550        /* check status */
 551        stat = hwif->tp_ops->read_status(hwif);
 552
 553        if (!OK_STAT(stat, 0, BAD_R_STAT)) {
 554                rc = cdrom_decode_status(drive, stat);
 555                if (rc) {
 556                        if (rc == 2)
 557                                goto out_end;
 558                        return ide_stopped;
 559                }
 560        }
 561
 562        /* using dma, transfer is complete now */
 563        if (dma) {
 564                if (dma_error)
 565                        return ide_error(drive, "dma error", stat);
 566                uptodate = 1;
 567                goto out_end;
 568        }
 569
 570        ide_read_bcount_and_ireason(drive, &len, &ireason);
 571
 572        thislen = (rq->cmd_type == REQ_TYPE_FS) ? len : cmd->nleft;
 573        if (thislen > len)
 574                thislen = len;
 575
 576        ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
 577                                  stat, thislen);
 578
 579        /* If DRQ is clear, the command has completed. */
 580        if ((stat & ATA_DRQ) == 0) {
 581                if (rq->cmd_type == REQ_TYPE_FS) {
 582                        /*
 583                         * If we're not done reading/writing, complain.
 584                         * Otherwise, complete the command normally.
 585                         */
 586                        uptodate = 1;
 587                        if (cmd->nleft > 0) {
 588                                printk(KERN_ERR PFX "%s: %s: data underrun "
 589                                        "(%u bytes)\n", drive->name, __func__,
 590                                        cmd->nleft);
 591                                if (!write)
 592                                        rq->cmd_flags |= REQ_FAILED;
 593                                uptodate = 0;
 594                        }
 595                } else if (rq->cmd_type != REQ_TYPE_BLOCK_PC) {
 596                        ide_cd_request_sense_fixup(drive, cmd);
 597
 598                        uptodate = cmd->nleft ? 0 : 1;
 599
 600                        /*
 601                         * suck out the remaining bytes from the drive in an
 602                         * attempt to complete the data xfer. (see BZ#13399)
 603                         */
 604                        if (!(stat & ATA_ERR) && !uptodate && thislen) {
 605                                ide_pio_bytes(drive, cmd, write, thislen);
 606                                uptodate = cmd->nleft ? 0 : 1;
 607                        }
 608
 609                        if (!uptodate)
 610                                rq->cmd_flags |= REQ_FAILED;
 611                }
 612                goto out_end;
 613        }
 614
 615        rc = ide_check_ireason(drive, rq, len, ireason, write);
 616        if (rc)
 617                goto out_end;
 618
 619        cmd->last_xfer_len = 0;
 620
 621        ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
 622                                  "ireason: 0x%x",
 623                                  rq->cmd_type, ireason);
 624
 625        /* transfer data */
 626        while (thislen > 0) {
 627                int blen = min_t(int, thislen, cmd->nleft);
 628
 629                if (cmd->nleft == 0)
 630                        break;
 631
 632                ide_pio_bytes(drive, cmd, write, blen);
 633                cmd->last_xfer_len += blen;
 634
 635                thislen -= blen;
 636                len -= blen;
 637
 638                if (sense && write == 0)
 639                        rq->sense_len += blen;
 640        }
 641
 642        /* pad, if necessary */
 643        if (len > 0) {
 644                if (rq->cmd_type != REQ_TYPE_FS || write == 0)
 645                        ide_pad_transfer(drive, write, len);
 646                else {
 647                        printk(KERN_ERR PFX "%s: confused, missing data\n",
 648                                drive->name);
 649                        blk_dump_rq_flags(rq, "cdrom_newpc_intr");
 650                }
 651        }
 652
 653        if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
 654                timeout = rq->timeout;
 655        } else {
 656                timeout = ATAPI_WAIT_PC;
 657                if (rq->cmd_type != REQ_TYPE_FS)
 658                        expiry = ide_cd_expiry;
 659        }
 660
 661        hwif->expiry = expiry;
 662        ide_set_handler(drive, cdrom_newpc_intr, timeout);
 663        return ide_started;
 664
 665out_end:
 666        if (rq->cmd_type == REQ_TYPE_BLOCK_PC && rc == 0) {
 667                rq->resid_len = 0;
 668                blk_end_request_all(rq, 0);
 669                hwif->rq = NULL;
 670        } else {
 671                if (sense && uptodate)
 672                        ide_cd_complete_failed_rq(drive, rq);
 673
 674                if (rq->cmd_type == REQ_TYPE_FS) {
 675                        if (cmd->nleft == 0)
 676                                uptodate = 1;
 677                } else {
 678                        if (uptodate <= 0 && rq->errors == 0)
 679                                rq->errors = -EIO;
 680                }
 681
 682                if (uptodate == 0 && rq->bio)
 683                        if (ide_cd_error_cmd(drive, cmd))
 684                                return ide_stopped;
 685
 686                /* make sure it's fully ended */
 687                if (rq->cmd_type != REQ_TYPE_FS) {
 688                        rq->resid_len -= cmd->nbytes - cmd->nleft;
 689                        if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
 690                                rq->resid_len += cmd->last_xfer_len;
 691                }
 692
 693                ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq));
 694
 695                if (sense && rc == 2)
 696                        ide_error(drive, "request sense failure", stat);
 697        }
 698        return ide_stopped;
 699}
 700
 701static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 702{
 703        struct cdrom_info *cd = drive->driver_data;
 704        struct request_queue *q = drive->queue;
 705        int write = rq_data_dir(rq) == WRITE;
 706        unsigned short sectors_per_frame =
 707                queue_logical_block_size(q) >> SECTOR_BITS;
 708
 709        ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
 710                                  "secs_per_frame: %u",
 711                                  rq->cmd[0], rq->cmd_flags, sectors_per_frame);
 712
 713        if (write) {
 714                /* disk has become write protected */
 715                if (get_disk_ro(cd->disk))
 716                        return ide_stopped;
 717        } else {
 718                /*
 719                 * We may be retrying this request after an error.  Fix up any
 720                 * weirdness which might be present in the request packet.
 721                 */
 722                q->prep_rq_fn(q, rq);
 723        }
 724
 725        /* fs requests *must* be hardware frame aligned */
 726        if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
 727            (blk_rq_pos(rq) & (sectors_per_frame - 1)))
 728                return ide_stopped;
 729
 730        /* use DMA, if possible */
 731        drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 732
 733        if (write)
 734                cd->devinfo.media_written = 1;
 735
 736        rq->timeout = ATAPI_WAIT_PC;
 737
 738        return ide_started;
 739}
 740
 741static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
 742{
 743
 744        ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
 745                                  rq->cmd[0], rq->cmd_type);
 746
 747        if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
 748                rq->cmd_flags |= REQ_QUIET;
 749        else
 750                rq->cmd_flags &= ~REQ_FAILED;
 751
 752        drive->dma = 0;
 753
 754        /* sg request */
 755        if (rq->bio) {
 756                struct request_queue *q = drive->queue;
 757                char *buf = bio_data(rq->bio);
 758                unsigned int alignment;
 759
 760                drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 761
 762                /*
 763                 * check if dma is safe
 764                 *
 765                 * NOTE! The "len" and "addr" checks should possibly have
 766                 * separate masks.
 767                 */
 768                alignment = queue_dma_alignment(q) | q->dma_pad_mask;
 769                if ((unsigned long)buf & alignment
 770                    || blk_rq_bytes(rq) & q->dma_pad_mask
 771                    || object_is_on_stack(buf))
 772                        drive->dma = 0;
 773        }
 774}
 775
 776static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
 777                                        sector_t block)
 778{
 779        struct ide_cmd cmd;
 780        int uptodate = 0;
 781        unsigned int nsectors;
 782
 783        ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
 784                                  rq->cmd[0], (unsigned long long)block);
 785
 786        if (drive->debug_mask & IDE_DBG_RQ)
 787                blk_dump_rq_flags(rq, "ide_cd_do_request");
 788
 789        switch (rq->cmd_type) {
 790        case REQ_TYPE_FS:
 791                if (cdrom_start_rw(drive, rq) == ide_stopped)
 792                        goto out_end;
 793                break;
 794        case REQ_TYPE_SENSE:
 795        case REQ_TYPE_BLOCK_PC:
 796        case REQ_TYPE_ATA_PC:
 797                if (!rq->timeout)
 798                        rq->timeout = ATAPI_WAIT_PC;
 799
 800                cdrom_do_block_pc(drive, rq);
 801                break;
 802        case REQ_TYPE_SPECIAL:
 803                /* right now this can only be a reset... */
 804                uptodate = 1;
 805                goto out_end;
 806        default:
 807                BUG();
 808        }
 809
 810        /* prepare sense request for this command */
 811        ide_prep_sense(drive, rq);
 812
 813        memset(&cmd, 0, sizeof(cmd));
 814
 815        if (rq_data_dir(rq))
 816                cmd.tf_flags |= IDE_TFLAG_WRITE;
 817
 818        cmd.rq = rq;
 819
 820        if (rq->cmd_type == REQ_TYPE_FS || blk_rq_bytes(rq)) {
 821                ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
 822                ide_map_sg(drive, &cmd);
 823        }
 824
 825        return ide_issue_pc(drive, &cmd);
 826out_end:
 827        nsectors = blk_rq_sectors(rq);
 828
 829        if (nsectors == 0)
 830                nsectors = 1;
 831
 832        ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
 833
 834        return ide_stopped;
 835}
 836
 837/*
 838 * Ioctl handling.
 839 *
 840 * Routines which queue packet commands take as a final argument a pointer to a
 841 * request_sense struct. If execution of the command results in an error with a
 842 * CHECK CONDITION status, this structure will be filled with the results of the
 843 * subsequent request sense command. The pointer can also be NULL, in which case
 844 * no sense information is returned.
 845 */
 846static void msf_from_bcd(struct atapi_msf *msf)
 847{
 848        msf->minute = bcd2bin(msf->minute);
 849        msf->second = bcd2bin(msf->second);
 850        msf->frame  = bcd2bin(msf->frame);
 851}
 852
 853int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
 854{
 855        struct cdrom_info *info = drive->driver_data;
 856        struct cdrom_device_info *cdi = &info->devinfo;
 857        unsigned char cmd[BLK_MAX_CDB];
 858
 859        ide_debug_log(IDE_DBG_FUNC, "enter");
 860
 861        memset(cmd, 0, BLK_MAX_CDB);
 862        cmd[0] = GPCMD_TEST_UNIT_READY;
 863
 864        /*
 865         * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
 866         * instead of supporting the LOAD_UNLOAD opcode.
 867         */
 868        cmd[7] = cdi->sanyo_slot % 3;
 869
 870        return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
 871}
 872
 873static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
 874                               unsigned long *sectors_per_frame,
 875                               struct request_sense *sense)
 876{
 877        struct {
 878                __be32 lba;
 879                __be32 blocklen;
 880        } capbuf;
 881
 882        int stat;
 883        unsigned char cmd[BLK_MAX_CDB];
 884        unsigned len = sizeof(capbuf);
 885        u32 blocklen;
 886
 887        ide_debug_log(IDE_DBG_FUNC, "enter");
 888
 889        memset(cmd, 0, BLK_MAX_CDB);
 890        cmd[0] = GPCMD_READ_CDVD_CAPACITY;
 891
 892        stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
 893                               REQ_QUIET);
 894        if (stat)
 895                return stat;
 896
 897        /*
 898         * Sanity check the given block size, in so far as making
 899         * sure the sectors_per_frame we give to the caller won't
 900         * end up being bogus.
 901         */
 902        blocklen = be32_to_cpu(capbuf.blocklen);
 903        blocklen = (blocklen >> SECTOR_BITS) << SECTOR_BITS;
 904        switch (blocklen) {
 905        case 512:
 906        case 1024:
 907        case 2048:
 908        case 4096:
 909                break;
 910        default:
 911                printk_once(KERN_ERR PFX "%s: weird block size %u; "
 912                                "setting default block size to 2048\n",
 913                                drive->name, blocklen);
 914                blocklen = 2048;
 915                break;
 916        }
 917
 918        *capacity = 1 + be32_to_cpu(capbuf.lba);
 919        *sectors_per_frame = blocklen >> SECTOR_BITS;
 920
 921        ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
 922                                     *capacity, *sectors_per_frame);
 923
 924        return 0;
 925}
 926
 927static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
 928                                int format, char *buf, int buflen,
 929                                struct request_sense *sense)
 930{
 931        unsigned char cmd[BLK_MAX_CDB];
 932
 933        ide_debug_log(IDE_DBG_FUNC, "enter");
 934
 935        memset(cmd, 0, BLK_MAX_CDB);
 936
 937        cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
 938        cmd[6] = trackno;
 939        cmd[7] = (buflen >> 8);
 940        cmd[8] = (buflen & 0xff);
 941        cmd[9] = (format << 6);
 942
 943        if (msf_flag)
 944                cmd[1] = 2;
 945
 946        return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
 947}
 948
 949/* Try to read the entire TOC for the disk into our internal buffer. */
 950int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
 951{
 952        int stat, ntracks, i;
 953        struct cdrom_info *info = drive->driver_data;
 954        struct cdrom_device_info *cdi = &info->devinfo;
 955        struct atapi_toc *toc = info->toc;
 956        struct {
 957                struct atapi_toc_header hdr;
 958                struct atapi_toc_entry  ent;
 959        } ms_tmp;
 960        long last_written;
 961        unsigned long sectors_per_frame = SECTORS_PER_FRAME;
 962
 963        ide_debug_log(IDE_DBG_FUNC, "enter");
 964
 965        if (toc == NULL) {
 966                /* try to allocate space */
 967                toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
 968                if (toc == NULL) {
 969                        printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
 970                                        drive->name);
 971                        return -ENOMEM;
 972                }
 973                info->toc = toc;
 974        }
 975
 976        /*
 977         * Check to see if the existing data is still valid. If it is,
 978         * just return.
 979         */
 980        (void) cdrom_check_status(drive, sense);
 981
 982        if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
 983                return 0;
 984
 985        /* try to get the total cdrom capacity and sector size */
 986        stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
 987                                   sense);
 988        if (stat)
 989                toc->capacity = 0x1fffff;
 990
 991        set_capacity(info->disk, toc->capacity * sectors_per_frame);
 992        /* save a private copy of the TOC capacity for error handling */
 993        drive->probed_capacity = toc->capacity * sectors_per_frame;
 994
 995        blk_queue_logical_block_size(drive->queue,
 996                                     sectors_per_frame << SECTOR_BITS);
 997
 998        /* first read just the header, so we know how long the TOC is */
 999        stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1000                                    sizeof(struct atapi_toc_header), sense);
1001        if (stat)
1002                return stat;
1003
1004        if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1005                toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1006                toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1007        }
1008
1009        ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1010        if (ntracks <= 0)
1011                return -EIO;
1012        if (ntracks > MAX_TRACKS)
1013                ntracks = MAX_TRACKS;
1014
1015        /* now read the whole schmeer */
1016        stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1017                                  (char *)&toc->hdr,
1018                                   sizeof(struct atapi_toc_header) +
1019                                   (ntracks + 1) *
1020                                   sizeof(struct atapi_toc_entry), sense);
1021
1022        if (stat && toc->hdr.first_track > 1) {
1023                /*
1024                 * Cds with CDI tracks only don't have any TOC entries, despite
1025                 * of this the returned values are
1026                 * first_track == last_track = number of CDI tracks + 1,
1027                 * so that this case is indistinguishable from the same layout
1028                 * plus an additional audio track. If we get an error for the
1029                 * regular case, we assume a CDI without additional audio
1030                 * tracks. In this case the readable TOC is empty (CDI tracks
1031                 * are not included) and only holds the Leadout entry.
1032                 *
1033                 * Heiko EiƟfeldt.
1034                 */
1035                ntracks = 0;
1036                stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1037                                           (char *)&toc->hdr,
1038                                           sizeof(struct atapi_toc_header) +
1039                                           (ntracks + 1) *
1040                                           sizeof(struct atapi_toc_entry),
1041                                           sense);
1042                if (stat)
1043                        return stat;
1044
1045                if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1046                        toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1047                        toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1048                } else {
1049                        toc->hdr.first_track = CDROM_LEADOUT;
1050                        toc->hdr.last_track = CDROM_LEADOUT;
1051                }
1052        }
1053
1054        if (stat)
1055                return stat;
1056
1057        toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1058
1059        if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1060                toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1061                toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1062        }
1063
1064        for (i = 0; i <= ntracks; i++) {
1065                if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1066                        if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1067                                toc->ent[i].track = bcd2bin(toc->ent[i].track);
1068                        msf_from_bcd(&toc->ent[i].addr.msf);
1069                }
1070                toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1071                                                  toc->ent[i].addr.msf.second,
1072                                                  toc->ent[i].addr.msf.frame);
1073        }
1074
1075        if (toc->hdr.first_track != CDROM_LEADOUT) {
1076                /* read the multisession information */
1077                stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1078                                           sizeof(ms_tmp), sense);
1079                if (stat)
1080                        return stat;
1081
1082                toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1083        } else {
1084                ms_tmp.hdr.last_track = CDROM_LEADOUT;
1085                ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1086                toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1087        }
1088
1089        if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1090                /* re-read multisession information using MSF format */
1091                stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1092                                           sizeof(ms_tmp), sense);
1093                if (stat)
1094                        return stat;
1095
1096                msf_from_bcd(&ms_tmp.ent.addr.msf);
1097                toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1098                                                   ms_tmp.ent.addr.msf.second,
1099                                                   ms_tmp.ent.addr.msf.frame);
1100        }
1101
1102        toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1103
1104        /* now try to get the total cdrom capacity */
1105        stat = cdrom_get_last_written(cdi, &last_written);
1106        if (!stat && (last_written > toc->capacity)) {
1107                toc->capacity = last_written;
1108                set_capacity(info->disk, toc->capacity * sectors_per_frame);
1109                drive->probed_capacity = toc->capacity * sectors_per_frame;
1110        }
1111
1112        /* Remember that we've read this stuff. */
1113        drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1114
1115        return 0;
1116}
1117
1118int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1119{
1120        struct cdrom_info *info = drive->driver_data;
1121        struct cdrom_device_info *cdi = &info->devinfo;
1122        struct packet_command cgc;
1123        int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1124
1125        ide_debug_log(IDE_DBG_FUNC, "enter");
1126
1127        if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1128                size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1129
1130        init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1131        do {
1132                /* we seem to get stat=0x01,err=0x00 the first time (??) */
1133                stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1134                if (!stat)
1135                        break;
1136        } while (--attempts);
1137        return stat;
1138}
1139
1140void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1141{
1142        struct cdrom_info *cd = drive->driver_data;
1143        u16 curspeed, maxspeed;
1144
1145        ide_debug_log(IDE_DBG_FUNC, "enter");
1146
1147        if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1148                curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1149                maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1150        } else {
1151                curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1152                maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1153        }
1154
1155        ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1156                                     curspeed, maxspeed);
1157
1158        cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176);
1159        cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176);
1160}
1161
1162#define IDE_CD_CAPABILITIES \
1163        (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1164         CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1165         CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1166         CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1167         CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1168
1169static struct cdrom_device_ops ide_cdrom_dops = {
1170        .open                   = ide_cdrom_open_real,
1171        .release                = ide_cdrom_release_real,
1172        .drive_status           = ide_cdrom_drive_status,
1173        .check_events           = ide_cdrom_check_events_real,
1174        .tray_move              = ide_cdrom_tray_move,
1175        .lock_door              = ide_cdrom_lock_door,
1176        .select_speed           = ide_cdrom_select_speed,
1177        .get_last_session       = ide_cdrom_get_last_session,
1178        .get_mcn                = ide_cdrom_get_mcn,
1179        .reset                  = ide_cdrom_reset,
1180        .audio_ioctl            = ide_cdrom_audio_ioctl,
1181        .capability             = IDE_CD_CAPABILITIES,
1182        .generic_packet         = ide_cdrom_packet,
1183};
1184
1185static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1186{
1187        struct cdrom_info *info = drive->driver_data;
1188        struct cdrom_device_info *devinfo = &info->devinfo;
1189
1190        ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1191
1192        devinfo->ops = &ide_cdrom_dops;
1193        devinfo->speed = info->current_speed;
1194        devinfo->capacity = nslots;
1195        devinfo->handle = drive;
1196        strcpy(devinfo->name, drive->name);
1197
1198        if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1199                devinfo->mask |= CDC_SELECT_SPEED;
1200
1201        devinfo->disk = info->disk;
1202        return register_cdrom(devinfo);
1203}
1204
1205static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1206{
1207        struct cdrom_info *cd = drive->driver_data;
1208        struct cdrom_device_info *cdi = &cd->devinfo;
1209        u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1210        mechtype_t mechtype;
1211        int nslots = 1;
1212
1213        ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1214                                     drive->media, drive->atapi_flags);
1215
1216        cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1217                     CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1218                     CDC_MO_DRIVE | CDC_RAM);
1219
1220        if (drive->media == ide_optical) {
1221                cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1222                printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1223                                drive->name);
1224                return nslots;
1225        }
1226
1227        if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1228                drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1229                cdi->mask &= ~CDC_PLAY_AUDIO;
1230                return nslots;
1231        }
1232
1233        /*
1234         * We have to cheat a little here. the packet will eventually be queued
1235         * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1236         * Since this device hasn't been registered with the Uniform layer yet,
1237         * it can't do this. Same goes for cdi->ops.
1238         */
1239        cdi->handle = drive;
1240        cdi->ops = &ide_cdrom_dops;
1241
1242        if (ide_cdrom_get_capabilities(drive, buf))
1243                return 0;
1244
1245        if ((buf[8 + 6] & 0x01) == 0)
1246                drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1247        if (buf[8 + 6] & 0x08)
1248                drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1249        if (buf[8 + 3] & 0x01)
1250                cdi->mask &= ~CDC_CD_R;
1251        if (buf[8 + 3] & 0x02)
1252                cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1253        if (buf[8 + 2] & 0x38)
1254                cdi->mask &= ~CDC_DVD;
1255        if (buf[8 + 3] & 0x20)
1256                cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1257        if (buf[8 + 3] & 0x10)
1258                cdi->mask &= ~CDC_DVD_R;
1259        if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1260                cdi->mask &= ~CDC_PLAY_AUDIO;
1261
1262        mechtype = buf[8 + 6] >> 5;
1263        if (mechtype == mechtype_caddy ||
1264            mechtype == mechtype_popup ||
1265            (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1266                cdi->mask |= CDC_CLOSE_TRAY;
1267
1268        if (cdi->sanyo_slot > 0) {
1269                cdi->mask &= ~CDC_SELECT_DISC;
1270                nslots = 3;
1271        } else if (mechtype == mechtype_individual_changer ||
1272                   mechtype == mechtype_cartridge_changer) {
1273                nslots = cdrom_number_of_slots(cdi);
1274                if (nslots > 1)
1275                        cdi->mask &= ~CDC_SELECT_DISC;
1276        }
1277
1278        ide_cdrom_update_speed(drive, buf);
1279
1280        printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1281
1282        /* don't print speed if the drive reported 0 */
1283        if (cd->max_speed)
1284                printk(KERN_CONT " %dX", cd->max_speed);
1285
1286        printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1287
1288        if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1289                printk(KERN_CONT " DVD%s%s",
1290                                 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1291                                 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1292
1293        if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1294                printk(KERN_CONT " CD%s%s",
1295                                 (cdi->mask & CDC_CD_R) ? "" : "-R",
1296                                 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1297
1298        if ((cdi->mask & CDC_SELECT_DISC) == 0)
1299                printk(KERN_CONT " changer w/%d slots", nslots);
1300        else
1301                printk(KERN_CONT " drive");
1302
1303        printk(KERN_CONT ", %dkB Cache\n",
1304                         be16_to_cpup((__be16 *)&buf[8 + 12]));
1305
1306        return nslots;
1307}
1308
1309/* standard prep_rq_fn that builds 10 byte cmds */
1310static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1311{
1312        int hard_sect = queue_logical_block_size(q);
1313        long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
1314        unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
1315
1316        memset(rq->cmd, 0, BLK_MAX_CDB);
1317
1318        if (rq_data_dir(rq) == READ)
1319                rq->cmd[0] = GPCMD_READ_10;
1320        else
1321                rq->cmd[0] = GPCMD_WRITE_10;
1322
1323        /*
1324         * fill in lba
1325         */
1326        rq->cmd[2] = (block >> 24) & 0xff;
1327        rq->cmd[3] = (block >> 16) & 0xff;
1328        rq->cmd[4] = (block >>  8) & 0xff;
1329        rq->cmd[5] = block & 0xff;
1330
1331        /*
1332         * and transfer length
1333         */
1334        rq->cmd[7] = (blocks >> 8) & 0xff;
1335        rq->cmd[8] = blocks & 0xff;
1336        rq->cmd_len = 10;
1337        return BLKPREP_OK;
1338}
1339
1340/*
1341 * Most of the SCSI commands are supported directly by ATAPI devices.
1342 * This transform handles the few exceptions.
1343 */
1344static int ide_cdrom_prep_pc(struct request *rq)
1345{
1346        u8 *c = rq->cmd;
1347
1348        /* transform 6-byte read/write commands to the 10-byte version */
1349        if (c[0] == READ_6 || c[0] == WRITE_6) {
1350                c[8] = c[4];
1351                c[5] = c[3];
1352                c[4] = c[2];
1353                c[3] = c[1] & 0x1f;
1354                c[2] = 0;
1355                c[1] &= 0xe0;
1356                c[0] += (READ_10 - READ_6);
1357                rq->cmd_len = 10;
1358                return BLKPREP_OK;
1359        }
1360
1361        /*
1362         * it's silly to pretend we understand 6-byte sense commands, just
1363         * reject with ILLEGAL_REQUEST and the caller should take the
1364         * appropriate action
1365         */
1366        if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1367                rq->errors = ILLEGAL_REQUEST;
1368                return BLKPREP_KILL;
1369        }
1370
1371        return BLKPREP_OK;
1372}
1373
1374static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1375{
1376        if (rq->cmd_type == REQ_TYPE_FS)
1377                return ide_cdrom_prep_fs(q, rq);
1378        else if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
1379                return ide_cdrom_prep_pc(rq);
1380
1381        return 0;
1382}
1383
1384struct cd_list_entry {
1385        const char      *id_model;
1386        const char      *id_firmware;
1387        unsigned int    cd_flags;
1388};
1389
1390#ifdef CONFIG_IDE_PROC_FS
1391static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1392{
1393        unsigned long capacity, sectors_per_frame;
1394
1395        if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1396                return 0;
1397
1398        return capacity * sectors_per_frame;
1399}
1400
1401static int idecd_capacity_proc_show(struct seq_file *m, void *v)
1402{
1403        ide_drive_t *drive = m->private;
1404
1405        seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive));
1406        return 0;
1407}
1408
1409static int idecd_capacity_proc_open(struct inode *inode, struct file *file)
1410{
1411        return single_open(file, idecd_capacity_proc_show, PDE(inode)->data);
1412}
1413
1414static const struct file_operations idecd_capacity_proc_fops = {
1415        .owner          = THIS_MODULE,
1416        .open           = idecd_capacity_proc_open,
1417        .read           = seq_read,
1418        .llseek         = seq_lseek,
1419        .release        = single_release,
1420};
1421
1422static ide_proc_entry_t idecd_proc[] = {
1423        { "capacity", S_IFREG|S_IRUGO, &idecd_capacity_proc_fops },
1424        {}
1425};
1426
1427static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1428{
1429        return idecd_proc;
1430}
1431
1432static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1433{
1434        return NULL;
1435}
1436#endif
1437
1438static const struct cd_list_entry ide_cd_quirks_list[] = {
1439        /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1440        { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1441        /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1442        { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1443                                             IDE_AFLAG_PRE_ATAPI12,          },
1444        /* Vertos 300, some versions of this drive like to talk BCD. */
1445        { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1446        /* Vertos 600 ESD. */
1447        { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1448        /*
1449         * Sanyo 3 CD changer uses a non-standard command for CD changing
1450         * (by default standard ATAPI support for CD changers is used).
1451         */
1452        { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1453        { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1454        { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1455        /* Stingray 8X CD-ROM. */
1456        { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1457        /*
1458         * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1459         * mode sense page capabilities size, but older drives break.
1460         */
1461        { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1462        { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1463        /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1464        { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1465        /*
1466         * Some drives used by Apple don't advertise audio play
1467         * but they do support reading TOC & audio datas.
1468         */
1469        { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1470        { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1471        { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1472        { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1473        { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1474        { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1475        { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1476        { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1477        { NULL, NULL, 0 }
1478};
1479
1480static unsigned int ide_cd_flags(u16 *id)
1481{
1482        const struct cd_list_entry *cle = ide_cd_quirks_list;
1483
1484        while (cle->id_model) {
1485                if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1486                    (cle->id_firmware == NULL ||
1487                     strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1488                        return cle->cd_flags;
1489                cle++;
1490        }
1491
1492        return 0;
1493}
1494
1495static int ide_cdrom_setup(ide_drive_t *drive)
1496{
1497        struct cdrom_info *cd = drive->driver_data;
1498        struct cdrom_device_info *cdi = &cd->devinfo;
1499        struct request_queue *q = drive->queue;
1500        u16 *id = drive->id;
1501        char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1502        int nslots;
1503
1504        ide_debug_log(IDE_DBG_PROBE, "enter");
1505
1506        blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1507        blk_queue_dma_alignment(q, 31);
1508        blk_queue_update_dma_pad(q, 15);
1509
1510        drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1511        drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1512
1513        if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1514            fw_rev[4] == '1' && fw_rev[6] <= '2')
1515                drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1516                                     IDE_AFLAG_TOCADDR_AS_BCD);
1517        else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1518                 fw_rev[4] == '1' && fw_rev[6] <= '2')
1519                drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1520        else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1521                /* 3 => use CD in slot 0 */
1522                cdi->sanyo_slot = 3;
1523
1524        nslots = ide_cdrom_probe_capabilities(drive);
1525
1526        blk_queue_logical_block_size(q, CD_FRAMESIZE);
1527
1528        if (ide_cdrom_register(drive, nslots)) {
1529                printk(KERN_ERR PFX "%s: %s failed to register device with the"
1530                                " cdrom driver.\n", drive->name, __func__);
1531                cd->devinfo.handle = NULL;
1532                return 1;
1533        }
1534
1535        ide_proc_register_driver(drive, cd->driver);
1536        return 0;
1537}
1538
1539static void ide_cd_remove(ide_drive_t *drive)
1540{
1541        struct cdrom_info *info = drive->driver_data;
1542
1543        ide_debug_log(IDE_DBG_FUNC, "enter");
1544
1545        ide_proc_unregister_driver(drive, info->driver);
1546        device_del(&info->dev);
1547        del_gendisk(info->disk);
1548
1549        mutex_lock(&idecd_ref_mutex);
1550        put_device(&info->dev);
1551        mutex_unlock(&idecd_ref_mutex);
1552}
1553
1554static void ide_cd_release(struct device *dev)
1555{
1556        struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1557        struct cdrom_device_info *devinfo = &info->devinfo;
1558        ide_drive_t *drive = info->drive;
1559        struct gendisk *g = info->disk;
1560
1561        ide_debug_log(IDE_DBG_FUNC, "enter");
1562
1563        kfree(info->toc);
1564        if (devinfo->handle == drive)
1565                unregister_cdrom(devinfo);
1566        drive->driver_data = NULL;
1567        blk_queue_prep_rq(drive->queue, NULL);
1568        g->private_data = NULL;
1569        put_disk(g);
1570        kfree(info);
1571}
1572
1573static int ide_cd_probe(ide_drive_t *);
1574
1575static struct ide_driver ide_cdrom_driver = {
1576        .gen_driver = {
1577                .owner          = THIS_MODULE,
1578                .name           = "ide-cdrom",
1579                .bus            = &ide_bus_type,
1580        },
1581        .probe                  = ide_cd_probe,
1582        .remove                 = ide_cd_remove,
1583        .version                = IDECD_VERSION,
1584        .do_request             = ide_cd_do_request,
1585#ifdef CONFIG_IDE_PROC_FS
1586        .proc_entries           = ide_cd_proc_entries,
1587        .proc_devsets           = ide_cd_proc_devsets,
1588#endif
1589};
1590
1591static int idecd_open(struct block_device *bdev, fmode_t mode)
1592{
1593        struct cdrom_info *info;
1594        int rc = -ENXIO;
1595
1596        mutex_lock(&ide_cd_mutex);
1597        info = ide_cd_get(bdev->bd_disk);
1598        if (!info)
1599                goto out;
1600
1601        rc = cdrom_open(&info->devinfo, bdev, mode);
1602        if (rc < 0)
1603                ide_cd_put(info);
1604out:
1605        mutex_unlock(&ide_cd_mutex);
1606        return rc;
1607}
1608
1609static int idecd_release(struct gendisk *disk, fmode_t mode)
1610{
1611        struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1612
1613        mutex_lock(&ide_cd_mutex);
1614        cdrom_release(&info->devinfo, mode);
1615
1616        ide_cd_put(info);
1617        mutex_unlock(&ide_cd_mutex);
1618
1619        return 0;
1620}
1621
1622static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1623{
1624        struct packet_command cgc;
1625        char buffer[16];
1626        int stat;
1627        char spindown;
1628
1629        if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1630                return -EFAULT;
1631
1632        init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1633
1634        stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1635        if (stat)
1636                return stat;
1637
1638        buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1639        return cdrom_mode_select(cdi, &cgc);
1640}
1641
1642static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1643{
1644        struct packet_command cgc;
1645        char buffer[16];
1646        int stat;
1647        char spindown;
1648
1649        init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1650
1651        stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1652        if (stat)
1653                return stat;
1654
1655        spindown = buffer[11] & 0x0f;
1656        if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1657                return -EFAULT;
1658        return 0;
1659}
1660
1661static int idecd_locked_ioctl(struct block_device *bdev, fmode_t mode,
1662                        unsigned int cmd, unsigned long arg)
1663{
1664        struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1665        int err;
1666
1667        switch (cmd) {
1668        case CDROMSETSPINDOWN:
1669                return idecd_set_spindown(&info->devinfo, arg);
1670        case CDROMGETSPINDOWN:
1671                return idecd_get_spindown(&info->devinfo, arg);
1672        default:
1673                break;
1674        }
1675
1676        err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1677        if (err == -EINVAL)
1678                err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1679
1680        return err;
1681}
1682
1683static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1684                             unsigned int cmd, unsigned long arg)
1685{
1686        int ret;
1687
1688        mutex_lock(&ide_cd_mutex);
1689        ret = idecd_locked_ioctl(bdev, mode, cmd, arg);
1690        mutex_unlock(&ide_cd_mutex);
1691
1692        return ret;
1693}
1694
1695
1696static unsigned int idecd_check_events(struct gendisk *disk,
1697                                       unsigned int clearing)
1698{
1699        struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1700        return cdrom_check_events(&info->devinfo, clearing);
1701}
1702
1703static int idecd_revalidate_disk(struct gendisk *disk)
1704{
1705        struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1706        struct request_sense sense;
1707
1708        ide_cd_read_toc(info->drive, &sense);
1709
1710        return  0;
1711}
1712
1713static const struct block_device_operations idecd_ops = {
1714        .owner                  = THIS_MODULE,
1715        .open                   = idecd_open,
1716        .release                = idecd_release,
1717        .ioctl                  = idecd_ioctl,
1718        .check_events           = idecd_check_events,
1719        .revalidate_disk        = idecd_revalidate_disk
1720};
1721
1722/* module options */
1723static unsigned long debug_mask;
1724module_param(debug_mask, ulong, 0644);
1725
1726MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1727
1728static int ide_cd_probe(ide_drive_t *drive)
1729{
1730        struct cdrom_info *info;
1731        struct gendisk *g;
1732        struct request_sense sense;
1733
1734        ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1735                                     drive->driver_req, drive->media);
1736
1737        if (!strstr("ide-cdrom", drive->driver_req))
1738                goto failed;
1739
1740        if (drive->media != ide_cdrom && drive->media != ide_optical)
1741                goto failed;
1742
1743        drive->debug_mask = debug_mask;
1744        drive->irq_handler = cdrom_newpc_intr;
1745
1746        info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1747        if (info == NULL) {
1748                printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1749                                drive->name);
1750                goto failed;
1751        }
1752
1753        g = alloc_disk(1 << PARTN_BITS);
1754        if (!g)
1755                goto out_free_cd;
1756
1757        ide_init_disk(g, drive);
1758
1759        info->dev.parent = &drive->gendev;
1760        info->dev.release = ide_cd_release;
1761        dev_set_name(&info->dev, dev_name(&drive->gendev));
1762
1763        if (device_register(&info->dev))
1764                goto out_free_disk;
1765
1766        info->drive = drive;
1767        info->driver = &ide_cdrom_driver;
1768        info->disk = g;
1769
1770        g->private_data = &info->driver;
1771
1772        drive->driver_data = info;
1773
1774        g->minors = 1;
1775        g->driverfs_dev = &drive->gendev;
1776        g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1777        if (ide_cdrom_setup(drive)) {
1778                put_device(&info->dev);
1779                goto failed;
1780        }
1781
1782        ide_cd_read_toc(drive, &sense);
1783        g->fops = &idecd_ops;
1784        g->flags |= GENHD_FL_REMOVABLE | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
1785        add_disk(g);
1786        return 0;
1787
1788out_free_disk:
1789        put_disk(g);
1790out_free_cd:
1791        kfree(info);
1792failed:
1793        return -ENODEV;
1794}
1795
1796static void __exit ide_cdrom_exit(void)
1797{
1798        driver_unregister(&ide_cdrom_driver.gen_driver);
1799}
1800
1801static int __init ide_cdrom_init(void)
1802{
1803        printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1804        return driver_register(&ide_cdrom_driver.gen_driver);
1805}
1806
1807MODULE_ALIAS("ide:*m-cdrom*");
1808MODULE_ALIAS("ide-cd");
1809module_init(ide_cdrom_init);
1810module_exit(ide_cdrom_exit);
1811MODULE_LICENSE("GPL");
1812
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