LXR linux-bk/include/linux/cdrom.h

   1/*
   2 * -- <linux/cdrom.h>
   3 * General header file for linux CD-ROM drivers 
   4 * Copyright (C) 1992         David Giller, rafetmad@oxy.edu
   5 *               1994, 1995   Eberhard Moenkeberg, emoenke@gwdg.de
   6 *               1996         David van Leeuwen, david@tm.tno.nl
   7 *               1997, 1998   Erik Andersen, andersee@debian.org
   8 *               1998-2002    Jens Axboe, axboe@suse.de
   9 */
  10 
  11#ifndef _LINUX_CDROM_H
  12#define _LINUX_CDROM_H
  13
  14#include <asm/byteorder.h>
  15
  16/*******************************************************
  17 * As of Linux 2.1.x, all Linux CD-ROM application programs will use this 
  18 * (and only this) include file.  It is my hope to provide Linux with
  19 * a uniform interface between software accessing CD-ROMs and the various 
  20 * device drivers that actually talk to the drives.  There may still be
  21 * 23 different kinds of strange CD-ROM drives, but at least there will 
  22 * now be one, and only one, Linux CD-ROM interface.
  23 *
  24 * Additionally, as of Linux 2.1.x, all Linux application programs 
  25 * should use the O_NONBLOCK option when opening a CD-ROM device 
  26 * for subsequent ioctl commands.  This allows for neat system errors 
  27 * like "No medium found" or "Wrong medium type" upon attempting to 
  28 * mount or play an empty slot, mount an audio disc, or play a data disc.
  29 * Generally, changing an application program to support O_NONBLOCK
  30 * is as easy as the following:
  31 *       -    drive = open("/dev/cdrom", O_RDONLY);
  32 *       +    drive = open("/dev/cdrom", O_RDONLY | O_NONBLOCK);
  33 * It is worth the small change.
  34 *
  35 *  Patches for many common CD programs (provided by David A. van Leeuwen)
  36 *  can be found at:  ftp://ftp.gwdg.de/pub/linux/cdrom/drivers/cm206/
  37 * 
  38 *******************************************************/
  39
  40/* When a driver supports a certain function, but the cdrom drive we are 
  41 * using doesn't, we will return the error EDRIVE_CANT_DO_THIS.  We will 
  42 * borrow the "Operation not supported" error from the network folks to 
  43 * accomplish this.  Maybe someday we will get a more targeted error code, 
  44 * but this will do for now... */
  45#define EDRIVE_CANT_DO_THIS  EOPNOTSUPP
  46
  47/*******************************************************
  48 * The CD-ROM IOCTL commands  -- these should be supported by 
  49 * all the various cdrom drivers.  For the CD-ROM ioctls, we 
  50 * will commandeer byte 0x53, or 'S'.
  51 *******************************************************/
  52#define CDROMPAUSE              0x5301 /* Pause Audio Operation */ 
  53#define CDROMRESUME             0x5302 /* Resume paused Audio Operation */
  54#define CDROMPLAYMSF            0x5303 /* Play Audio MSF (struct cdrom_msf) */
  55#define CDROMPLAYTRKIND         0x5304 /* Play Audio Track/index 
  56                                           (struct cdrom_ti) */
  57#define CDROMREADTOCHDR         0x5305 /* Read TOC header 
  58                                           (struct cdrom_tochdr) */
  59#define CDROMREADTOCENTRY       0x5306 /* Read TOC entry 
  60                                           (struct cdrom_tocentry) */
  61#define CDROMSTOP               0x5307 /* Stop the cdrom drive */
  62#define CDROMSTART              0x5308 /* Start the cdrom drive */
  63#define CDROMEJECT              0x5309 /* Ejects the cdrom media */
  64#define CDROMVOLCTRL            0x530a /* Control output volume 
  65                                           (struct cdrom_volctrl) */
  66#define CDROMSUBCHNL            0x530b /* Read subchannel data 
  67                                           (struct cdrom_subchnl) */
  68#define CDROMREADMODE2          0x530c /* Read CDROM mode 2 data (2336 Bytes) 
  69                                           (struct cdrom_read) */
  70#define CDROMREADMODE1          0x530d /* Read CDROM mode 1 data (2048 Bytes)
  71                                           (struct cdrom_read) */
  72#define CDROMREADAUDIO          0x530e /* (struct cdrom_read_audio) */
  73#define CDROMEJECT_SW           0x530f /* enable(1)/disable(0) auto-ejecting */
  74#define CDROMMULTISESSION       0x5310 /* Obtain the start-of-last-session 
  75                                           address of multi session disks 
  76                                           (struct cdrom_multisession) */
  77#define CDROM_GET_MCN           0x5311 /* Obtain the "Universal Product Code" 
  78                                           if available (struct cdrom_mcn) */
  79#define CDROM_GET_UPC           CDROM_GET_MCN  /* This one is depricated, 
  80                                          but here anyway for compatibility */
  81#define CDROMRESET              0x5312 /* hard-reset the drive */
  82#define CDROMVOLREAD            0x5313 /* Get the drive's volume setting 
  83                                          (struct cdrom_volctrl) */
  84#define CDROMREADRAW            0x5314  /* read data in raw mode (2352 Bytes)
  85                                           (struct cdrom_read) */
  86/* 
  87 * These ioctls are used only used in aztcd.c and optcd.c
  88 */
  89#define CDROMREADCOOKED         0x5315  /* read data in cooked mode */
  90#define CDROMSEEK               0x5316  /* seek msf address */
  91  
  92/*
  93 * This ioctl is only used by the scsi-cd driver.  
  94   It is for playing audio in logical block addressing mode.
  95 */
  96#define CDROMPLAYBLK            0x5317  /* (struct cdrom_blk) */
  97
  98/* 
  99 * These ioctls are only used in optcd.c
 100 */
 101#define CDROMREADALL            0x5318  /* read all 2646 bytes */
 102
 103/* 
 104 * These ioctls are (now) only in ide-cd.c for controlling 
 105 * drive spindown time.  They should be implemented in the
 106 * Uniform driver, via generic packet commands, GPCMD_MODE_SELECT_10,
 107 * GPCMD_MODE_SENSE_10 and the GPMODE_POWER_PAGE...
 108 *  -Erik
 109 */
 110#define CDROMGETSPINDOWN        0x531d
 111#define CDROMSETSPINDOWN        0x531e
 112
 113/* 
 114 * These ioctls are implemented through the uniform CD-ROM driver
 115 * They _will_ be adopted by all CD-ROM drivers, when all the CD-ROM
 116 * drivers are eventually ported to the uniform CD-ROM driver interface.
 117 */
 118#define CDROMCLOSETRAY          0x5319  /* pendant of CDROMEJECT */
 119#define CDROM_SET_OPTIONS       0x5320  /* Set behavior options */
 120#define CDROM_CLEAR_OPTIONS     0x5321  /* Clear behavior options */
 121#define CDROM_SELECT_SPEED      0x5322  /* Set the CD-ROM speed */
 122#define CDROM_SELECT_DISC       0x5323  /* Select disc (for juke-boxes) */
 123#define CDROM_MEDIA_CHANGED     0x5325  /* Check is media changed  */
 124#define CDROM_DRIVE_STATUS      0x5326  /* Get tray position, etc. */
 125#define CDROM_DISC_STATUS       0x5327  /* Get disc type, etc. */
 126#define CDROM_CHANGER_NSLOTS    0x5328  /* Get number of slots */
 127#define CDROM_LOCKDOOR          0x5329  /* lock or unlock door */
 128#define CDROM_DEBUG             0x5330  /* Turn debug messages on/off */
 129#define CDROM_GET_CAPABILITY    0x5331  /* get capabilities */
 130
 131/* Note that scsi/scsi_ioctl.h also uses 0x5382 - 0x5386.
 132 * Future CDROM ioctls should be kept below 0x537F
 133 */
 134
 135/* This ioctl is only used by sbpcd at the moment */
 136#define CDROMAUDIOBUFSIZ        0x5382  /* set the audio buffer size */
 137                                        /* conflict with SCSI_IOCTL_GET_IDLUN */
 138
 139/* DVD-ROM Specific ioctls */
 140#define DVD_READ_STRUCT         0x5390  /* Read structure */
 141#define DVD_WRITE_STRUCT        0x5391  /* Write structure */
 142#define DVD_AUTH                0x5392  /* Authentication */
 143
 144#define CDROM_SEND_PACKET       0x5393  /* send a packet to the drive */
 145#define CDROM_NEXT_WRITABLE     0x5394  /* get next writable block */
 146#define CDROM_LAST_WRITTEN      0x5395  /* get last block written on disc */
 147
 148/*******************************************************
 149 * CDROM IOCTL structures
 150 *******************************************************/
 151
 152/* Address in MSF format */
 153struct cdrom_msf0               
 154{
 155        __u8    minute;
 156        __u8    second;
 157        __u8    frame;
 158};
 159
 160/* Address in either MSF or logical format */
 161union cdrom_addr                
 162{
 163        struct cdrom_msf0       msf;
 164        int                     lba;
 165};
 166
 167/* This struct is used by the CDROMPLAYMSF ioctl */ 
 168struct cdrom_msf 
 169{
 170        __u8    cdmsf_min0;     /* start minute */
 171        __u8    cdmsf_sec0;     /* start second */
 172        __u8    cdmsf_frame0;   /* start frame */
 173        __u8    cdmsf_min1;     /* end minute */
 174        __u8    cdmsf_sec1;     /* end second */
 175        __u8    cdmsf_frame1;   /* end frame */
 176};
 177
 178/* This struct is used by the CDROMPLAYTRKIND ioctl */
 179struct cdrom_ti 
 180{
 181        __u8    cdti_trk0;      /* start track */
 182        __u8    cdti_ind0;      /* start index */
 183        __u8    cdti_trk1;      /* end track */
 184        __u8    cdti_ind1;      /* end index */
 185};
 186
 187/* This struct is used by the CDROMREADTOCHDR ioctl */
 188struct cdrom_tochdr     
 189{
 190        __u8    cdth_trk0;      /* start track */
 191        __u8    cdth_trk1;      /* end track */
 192};
 193
 194/* This struct is used by the CDROMVOLCTRL and CDROMVOLREAD ioctls */
 195struct cdrom_volctrl
 196{
 197        __u8    channel0;
 198        __u8    channel1;
 199        __u8    channel2;
 200        __u8    channel3;
 201};
 202
 203/* This struct is used by the CDROMSUBCHNL ioctl */
 204struct cdrom_subchnl 
 205{
 206        __u8    cdsc_format;
 207        __u8    cdsc_audiostatus;
 208        __u8    cdsc_adr:       4;
 209        __u8    cdsc_ctrl:      4;
 210        __u8    cdsc_trk;
 211        __u8    cdsc_ind;
 212        union cdrom_addr cdsc_absaddr;
 213        union cdrom_addr cdsc_reladdr;
 214};
 215
 216
 217/* This struct is used by the CDROMREADTOCENTRY ioctl */
 218struct cdrom_tocentry 
 219{
 220        __u8    cdte_track;
 221        __u8    cdte_adr        :4;
 222        __u8    cdte_ctrl       :4;
 223        __u8    cdte_format;
 224        union cdrom_addr cdte_addr;
 225        __u8    cdte_datamode;
 226};
 227
 228/* This struct is used by the CDROMREADMODE1, and CDROMREADMODE2 ioctls */
 229struct cdrom_read      
 230{
 231        int     cdread_lba;
 232        char    *cdread_bufaddr;
 233        int     cdread_buflen;
 234};
 235
 236/* This struct is used by the CDROMREADAUDIO ioctl */
 237struct cdrom_read_audio
 238{
 239        union cdrom_addr addr; /* frame address */
 240        __u8 addr_format;      /* CDROM_LBA or CDROM_MSF */
 241        int nframes;           /* number of 2352-byte-frames to read at once */
 242        __u8 __user *buf;      /* frame buffer (size: nframes*2352 bytes) */
 243};
 244
 245/* This struct is used with the CDROMMULTISESSION ioctl */
 246struct cdrom_multisession
 247{
 248        union cdrom_addr addr; /* frame address: start-of-last-session 
 249                                   (not the new "frame 16"!).  Only valid
 250                                   if the "xa_flag" is true. */
 251        __u8 xa_flag;        /* 1: "is XA disk" */
 252        __u8 addr_format;    /* CDROM_LBA or CDROM_MSF */
 253};
 254
 255/* This struct is used with the CDROM_GET_MCN ioctl.  
 256 * Very few audio discs actually have Universal Product Code information, 
 257 * which should just be the Medium Catalog Number on the box.  Also note 
 258 * that the way the codeis written on CD is _not_ uniform across all discs!
 259 */  
 260struct cdrom_mcn 
 261{
 262  __u8 medium_catalog_number[14]; /* 13 ASCII digits, null-terminated */
 263};
 264
 265/* This is used by the CDROMPLAYBLK ioctl */
 266struct cdrom_blk 
 267{
 268        unsigned from;
 269        unsigned short len;
 270};
 271
 272#define CDROM_PACKET_SIZE       12
 273
 274#define CGC_DATA_UNKNOWN        0
 275#define CGC_DATA_WRITE          1
 276#define CGC_DATA_READ           2
 277#define CGC_DATA_NONE           3
 278
 279/* for CDROM_PACKET_COMMAND ioctl */
 280struct cdrom_generic_command
 281{
 282        unsigned char           cmd[CDROM_PACKET_SIZE];
 283        unsigned char           __user *buffer;
 284        unsigned int            buflen;
 285        int                     stat;
 286        struct request_sense    __user *sense;
 287        unsigned char           data_direction;
 288        int                     quiet;
 289        int                     timeout;
 290        void                    __user *reserved[1];    /* unused, actually */
 291};
 292
 293/*
 294 * A CD-ROM physical sector size is 2048, 2052, 2056, 2324, 2332, 2336, 
 295 * 2340, or 2352 bytes long.  
 296
 297*         Sector types of the standard CD-ROM data formats:
 298 *
 299 * format   sector type               user data size (bytes)
 300 * -----------------------------------------------------------------------------
 301 *   1     (Red Book)    CD-DA          2352    (CD_FRAMESIZE_RAW)
 302 *   2     (Yellow Book) Mode1 Form1    2048    (CD_FRAMESIZE)
 303 *   3     (Yellow Book) Mode1 Form2    2336    (CD_FRAMESIZE_RAW0)
 304 *   4     (Green Book)  Mode2 Form1    2048    (CD_FRAMESIZE)
 305 *   5     (Green Book)  Mode2 Form2    2328    (2324+4 spare bytes)
 306 *
 307 *
 308 *       The layout of the standard CD-ROM data formats:
 309 * -----------------------------------------------------------------------------
 310 * - audio (red):                  | audio_sample_bytes |
 311 *                                 |        2352        |
 312 *
 313 * - data (yellow, mode1):         | sync - head - data - EDC - zero - ECC |
 314 *                                 |  12  -   4  - 2048 -  4  -   8  - 276 |
 315 *
 316 * - data (yellow, mode2):         | sync - head - data |
 317 *                                 |  12  -   4  - 2336 |
 318 *
 319 * - XA data (green, mode2 form1): | sync - head - sub - data - EDC - ECC |
 320 *                                 |  12  -   4  -  8  - 2048 -  4  - 276 |
 321 *
 322 * - XA data (green, mode2 form2): | sync - head - sub - data - Spare |
 323 *                                 |  12  -   4  -  8  - 2324 -  4    |
 324 *
 325 */
 326
 327/* Some generally useful CD-ROM information -- mostly based on the above */
 328#define CD_MINS              74 /* max. minutes per CD, not really a limit */
 329#define CD_SECS              60 /* seconds per minute */
 330#define CD_FRAMES            75 /* frames per second */
 331#define CD_SYNC_SIZE         12 /* 12 sync bytes per raw data frame */
 332#define CD_MSF_OFFSET       150 /* MSF numbering offset of first frame */
 333#define CD_CHUNK_SIZE        24 /* lowest-level "data bytes piece" */
 334#define CD_NUM_OF_CHUNKS     98 /* chunks per frame */
 335#define CD_FRAMESIZE_SUB     96 /* subchannel data "frame" size */
 336#define CD_HEAD_SIZE          4 /* header (address) bytes per raw data frame */
 337#define CD_SUBHEAD_SIZE       8 /* subheader bytes per raw XA data frame */
 338#define CD_EDC_SIZE           4 /* bytes EDC per most raw data frame types */
 339#define CD_ZERO_SIZE          8 /* bytes zero per yellow book mode 1 frame */
 340#define CD_ECC_SIZE         276 /* bytes ECC per most raw data frame types */
 341#define CD_FRAMESIZE       2048 /* bytes per frame, "cooked" mode */
 342#define CD_FRAMESIZE_RAW   2352 /* bytes per frame, "raw" mode */
 343#define CD_FRAMESIZE_RAWER 2646 /* The maximum possible returned bytes */ 
 344/* most drives don't deliver everything: */
 345#define CD_FRAMESIZE_RAW1 (CD_FRAMESIZE_RAW-CD_SYNC_SIZE) /*2340*/
 346#define CD_FRAMESIZE_RAW0 (CD_FRAMESIZE_RAW-CD_SYNC_SIZE-CD_HEAD_SIZE) /*2336*/
 347
 348#define CD_XA_HEAD        (CD_HEAD_SIZE+CD_SUBHEAD_SIZE) /* "before data" part of raw XA frame */
 349#define CD_XA_TAIL        (CD_EDC_SIZE+CD_ECC_SIZE) /* "after data" part of raw XA frame */
 350#define CD_XA_SYNC_HEAD   (CD_SYNC_SIZE+CD_XA_HEAD) /* sync bytes + header of XA frame */
 351
 352/* CD-ROM address types (cdrom_tocentry.cdte_format) */
 353#define CDROM_LBA 0x01 /* "logical block": first frame is #0 */
 354#define CDROM_MSF 0x02 /* "minute-second-frame": binary, not bcd here! */
 355
 356/* bit to tell whether track is data or audio (cdrom_tocentry.cdte_ctrl) */
 357#define CDROM_DATA_TRACK        0x04
 358
 359/* The leadout track is always 0xAA, regardless of # of tracks on disc */
 360#define CDROM_LEADOUT           0xAA
 361
 362/* audio states (from SCSI-2, but seen with other drives, too) */
 363#define CDROM_AUDIO_INVALID     0x00    /* audio status not supported */
 364#define CDROM_AUDIO_PLAY        0x11    /* audio play operation in progress */
 365#define CDROM_AUDIO_PAUSED      0x12    /* audio play operation paused */
 366#define CDROM_AUDIO_COMPLETED   0x13    /* audio play successfully completed */
 367#define CDROM_AUDIO_ERROR       0x14    /* audio play stopped due to error */
 368#define CDROM_AUDIO_NO_STATUS   0x15    /* no current audio status to return */
 369
 370/* capability flags used with the uniform CD-ROM driver */ 
 371#define CDC_CLOSE_TRAY          0x1     /* caddy systems _can't_ close */
 372#define CDC_OPEN_TRAY           0x2     /* but _can_ eject.  */
 373#define CDC_LOCK                0x4     /* disable manual eject */
 374#define CDC_SELECT_SPEED        0x8     /* programmable speed */
 375#define CDC_SELECT_DISC         0x10    /* select disc from juke-box */
 376#define CDC_MULTI_SESSION       0x20    /* read sessions>1 */
 377#define CDC_MCN                 0x40    /* Medium Catalog Number */
 378#define CDC_MEDIA_CHANGED       0x80    /* media changed */
 379#define CDC_PLAY_AUDIO          0x100   /* audio functions */
 380#define CDC_RESET               0x200   /* hard reset device */
 381#define CDC_IOCTLS              0x400   /* driver has non-standard ioctls */
 382#define CDC_DRIVE_STATUS        0x800   /* driver implements drive status */
 383#define CDC_GENERIC_PACKET      0x1000  /* driver implements generic packets */
 384#define CDC_CD_R                0x2000  /* drive is a CD-R */
 385#define CDC_CD_RW               0x4000  /* drive is a CD-RW */
 386#define CDC_DVD                 0x8000  /* drive is a DVD */
 387#define CDC_DVD_R               0x10000 /* drive can write DVD-R */
 388#define CDC_DVD_RAM             0x20000 /* drive can write DVD-RAM */
 389#define CDC_MO_DRIVE            0x40000 /* drive is an MO device */
 390#define CDC_MRW                 0x80000 /* drive can read MRW */
 391#define CDC_MRW_W               0x100000 /* drive can write MRW */
 392#define CDC_RAM                 0x200000 /* ok to open for WRITE */
 393
 394/* drive status possibilities returned by CDROM_DRIVE_STATUS ioctl */
 395#define CDS_NO_INFO             0       /* if not implemented */
 396#define CDS_NO_DISC             1
 397#define CDS_TRAY_OPEN           2
 398#define CDS_DRIVE_NOT_READY     3
 399#define CDS_DISC_OK             4
 400
 401/* return values for the CDROM_DISC_STATUS ioctl */
 402/* can also return CDS_NO_[INFO|DISC], from above */
 403#define CDS_AUDIO               100
 404#define CDS_DATA_1              101
 405#define CDS_DATA_2              102
 406#define CDS_XA_2_1              103
 407#define CDS_XA_2_2              104
 408#define CDS_MIXED               105
 409
 410/* User-configurable behavior options for the uniform CD-ROM driver */
 411#define CDO_AUTO_CLOSE          0x1     /* close tray on first open() */
 412#define CDO_AUTO_EJECT          0x2     /* open tray on last release() */
 413#define CDO_USE_FFLAGS          0x4     /* use O_NONBLOCK information on open */
 414#define CDO_LOCK                0x8     /* lock tray on open files */
 415#define CDO_CHECK_TYPE          0x10    /* check type on open for data */
 416
 417/* Special codes used when specifying changer slots. */
 418#define CDSL_NONE               ((int) (~0U>>1)-1)
 419#define CDSL_CURRENT            ((int) (~0U>>1))
 420
 421/* For partition based multisession access. IDE can handle 64 partitions
 422 * per drive - SCSI CD-ROM's use minors to differentiate between the
 423 * various drives, so we can't do multisessions the same way there.
 424 * Use the -o session=x option to mount on them.
 425 */
 426#define CD_PART_MAX             64
 427#define CD_PART_MASK            (CD_PART_MAX - 1)
 428
 429/*********************************************************************
 430 * Generic Packet commands, MMC commands, and such
 431 *********************************************************************/
 432
 433 /* The generic packet command opcodes for CD/DVD Logical Units,
 434 * From Table 57 of the SFF8090 Ver. 3 (Mt. Fuji) draft standard. */
 435#define GPCMD_BLANK                         0xa1
 436#define GPCMD_CLOSE_TRACK                   0x5b
 437#define GPCMD_FLUSH_CACHE                   0x35
 438#define GPCMD_FORMAT_UNIT                   0x04
 439#define GPCMD_GET_CONFIGURATION             0x46
 440#define GPCMD_GET_EVENT_STATUS_NOTIFICATION 0x4a
 441#define GPCMD_GET_PERFORMANCE               0xac
 442#define GPCMD_INQUIRY                       0x12
 443#define GPCMD_LOAD_UNLOAD                   0xa6
 444#define GPCMD_MECHANISM_STATUS              0xbd
 445#define GPCMD_MODE_SELECT_10                0x55
 446#define GPCMD_MODE_SENSE_10                 0x5a
 447#define GPCMD_PAUSE_RESUME                  0x4b
 448#define GPCMD_PLAY_AUDIO_10                 0x45
 449#define GPCMD_PLAY_AUDIO_MSF                0x47
 450#define GPCMD_PLAY_AUDIO_TI                 0x48
 451#define GPCMD_PLAY_CD                       0xbc
 452#define GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL  0x1e
 453#define GPCMD_READ_10                       0x28
 454#define GPCMD_READ_12                       0xa8
 455#define GPCMD_READ_CDVD_CAPACITY            0x25
 456#define GPCMD_READ_CD                       0xbe
 457#define GPCMD_READ_CD_MSF                   0xb9
 458#define GPCMD_READ_DISC_INFO                0x51
 459#define GPCMD_READ_DVD_STRUCTURE            0xad
 460#define GPCMD_READ_FORMAT_CAPACITIES        0x23
 461#define GPCMD_READ_HEADER                   0x44
 462#define GPCMD_READ_TRACK_RZONE_INFO         0x52
 463#define GPCMD_READ_SUBCHANNEL               0x42
 464#define GPCMD_READ_TOC_PMA_ATIP             0x43
 465#define GPCMD_REPAIR_RZONE_TRACK            0x58
 466#define GPCMD_REPORT_KEY                    0xa4
 467#define GPCMD_REQUEST_SENSE                 0x03
 468#define GPCMD_RESERVE_RZONE_TRACK           0x53
 469#define GPCMD_SCAN                          0xba
 470#define GPCMD_SEEK                          0x2b
 471#define GPCMD_SEND_DVD_STRUCTURE            0xad
 472#define GPCMD_SEND_EVENT                    0xa2
 473#define GPCMD_SEND_KEY                      0xa3
 474#define GPCMD_SEND_OPC                      0x54
 475#define GPCMD_SET_READ_AHEAD                0xa7
 476#define GPCMD_SET_STREAMING                 0xb6
 477#define GPCMD_START_STOP_UNIT               0x1b
 478#define GPCMD_STOP_PLAY_SCAN                0x4e
 479#define GPCMD_TEST_UNIT_READY               0x00
 480#define GPCMD_VERIFY_10                     0x2f
 481#define GPCMD_WRITE_10                      0x2a
 482#define GPCMD_WRITE_AND_VERIFY_10           0x2e
 483/* This is listed as optional in ATAPI 2.6, but is (curiously) 
 484 * missing from Mt. Fuji, Table 57.  It _is_ mentioned in Mt. Fuji
 485 * Table 377 as an MMC command for SCSi devices though...  Most ATAPI
 486 * drives support it. */
 487#define GPCMD_SET_SPEED                     0xbb
 488/* This seems to be a SCSI specific CD-ROM opcode 
 489 * to play data at track/index */
 490#define GPCMD_PLAYAUDIO_TI                  0x48
 491/*
 492 * From MS Media Status Notification Support Specification. For
 493 * older drives only.
 494 */
 495#define GPCMD_GET_MEDIA_STATUS              0xda
 496
 497/* Mode page codes for mode sense/set */
 498#define GPMODE_VENDOR_PAGE              0x00
 499#define GPMODE_R_W_ERROR_PAGE           0x01
 500#define GPMODE_WRITE_PARMS_PAGE         0x05
 501#define GPMODE_AUDIO_CTL_PAGE           0x0e
 502#define GPMODE_POWER_PAGE               0x1a
 503#define GPMODE_FAULT_FAIL_PAGE          0x1c
 504#define GPMODE_TO_PROTECT_PAGE          0x1d
 505#define GPMODE_CAPABILITIES_PAGE        0x2a
 506#define GPMODE_ALL_PAGES                0x3f
 507/* Not in Mt. Fuji, but in ATAPI 2.6 -- depricated now in favor
 508 * of MODE_SENSE_POWER_PAGE */
 509#define GPMODE_CDROM_PAGE               0x0d
 510
 511
 512
 513/* DVD struct types */
 514#define DVD_STRUCT_PHYSICAL     0x00
 515#define DVD_STRUCT_COPYRIGHT    0x01
 516#define DVD_STRUCT_DISCKEY      0x02
 517#define DVD_STRUCT_BCA          0x03
 518#define DVD_STRUCT_MANUFACT     0x04
 519
 520struct dvd_layer {
 521        __u8 book_version       : 4;
 522        __u8 book_type          : 4;
 523        __u8 min_rate           : 4;
 524        __u8 disc_size          : 4;
 525        __u8 layer_type         : 4;
 526        __u8 track_path         : 1;
 527        __u8 nlayers            : 2;
 528        __u8 track_density      : 4;
 529        __u8 linear_density     : 4;
 530        __u8 bca                : 1;
 531        __u32 start_sector;
 532        __u32 end_sector;
 533        __u32 end_sector_l0;
 534};
 535
 536#define DVD_LAYERS      4
 537
 538struct dvd_physical {
 539        __u8 type;
 540        __u8 layer_num;
 541        struct dvd_layer layer[DVD_LAYERS];
 542};
 543
 544struct dvd_copyright {
 545        __u8 type;
 546
 547        __u8 layer_num;
 548        __u8 cpst;
 549        __u8 rmi;
 550};
 551
 552struct dvd_disckey {
 553        __u8 type;
 554
 555        unsigned agid           : 2;
 556        __u8 value[2048];
 557};
 558
 559struct dvd_bca {
 560        __u8 type;
 561
 562        int len;
 563        __u8 value[188];
 564};
 565
 566struct dvd_manufact {
 567        __u8 type;
 568
 569        __u8 layer_num;
 570        int len;
 571        __u8 value[2048];
 572};
 573
 574typedef union {
 575        __u8 type;
 576
 577        struct dvd_physical     physical;
 578        struct dvd_copyright    copyright;
 579        struct dvd_disckey      disckey;
 580        struct dvd_bca          bca;
 581        struct dvd_manufact     manufact;
 582} dvd_struct;
 583
 584/*
 585 * DVD authentication ioctl
 586 */
 587
 588/* Authentication states */
 589#define DVD_LU_SEND_AGID        0
 590#define DVD_HOST_SEND_CHALLENGE 1
 591#define DVD_LU_SEND_KEY1        2
 592#define DVD_LU_SEND_CHALLENGE   3
 593#define DVD_HOST_SEND_KEY2      4
 594
 595/* Termination states */
 596#define DVD_AUTH_ESTABLISHED    5
 597#define DVD_AUTH_FAILURE        6
 598
 599/* Other functions */
 600#define DVD_LU_SEND_TITLE_KEY   7
 601#define DVD_LU_SEND_ASF         8
 602#define DVD_INVALIDATE_AGID     9
 603#define DVD_LU_SEND_RPC_STATE   10
 604#define DVD_HOST_SEND_RPC_STATE 11
 605
 606/* State data */
 607typedef __u8 dvd_key[5];                /* 40-bit value, MSB is first elem. */
 608typedef __u8 dvd_challenge[10]; /* 80-bit value, MSB is first elem. */
 609
 610struct dvd_lu_send_agid {
 611        __u8 type;
 612        unsigned agid           : 2;
 613};
 614
 615struct dvd_host_send_challenge {
 616        __u8 type;
 617        unsigned agid           : 2;
 618
 619        dvd_challenge chal;
 620};
 621
 622struct dvd_send_key {
 623        __u8 type;
 624        unsigned agid           : 2;
 625
 626        dvd_key key;
 627};
 628
 629struct dvd_lu_send_challenge {
 630        __u8 type;
 631        unsigned agid           : 2;
 632
 633        dvd_challenge chal;
 634};
 635
 636#define DVD_CPM_NO_COPYRIGHT    0
 637#define DVD_CPM_COPYRIGHTED     1
 638
 639#define DVD_CP_SEC_NONE         0
 640#define DVD_CP_SEC_EXIST        1
 641
 642#define DVD_CGMS_UNRESTRICTED   0
 643#define DVD_CGMS_SINGLE         2
 644#define DVD_CGMS_RESTRICTED     3
 645
 646struct dvd_lu_send_title_key {
 647        __u8 type;
 648        unsigned agid           : 2;
 649
 650        dvd_key title_key;
 651        int lba;
 652        unsigned cpm            : 1;
 653        unsigned cp_sec         : 1;
 654        unsigned cgms           : 2;
 655};
 656
 657struct dvd_lu_send_asf {
 658        __u8 type;
 659        unsigned agid           : 2;
 660
 661        unsigned asf            : 1;
 662};
 663
 664struct dvd_host_send_rpcstate {
 665        __u8 type;
 666        __u8 pdrc;
 667};
 668
 669struct dvd_lu_send_rpcstate {
 670        __u8 type               : 2;
 671        __u8 vra                : 3;
 672        __u8 ucca               : 3;
 673        __u8 region_mask;
 674        __u8 rpc_scheme;
 675};
 676
 677typedef union {
 678        __u8 type;
 679
 680        struct dvd_lu_send_agid         lsa;
 681        struct dvd_host_send_challenge  hsc;
 682        struct dvd_send_key             lsk;
 683        struct dvd_lu_send_challenge    lsc;
 684        struct dvd_send_key             hsk;
 685        struct dvd_lu_send_title_key    lstk;
 686        struct dvd_lu_send_asf          lsasf;
 687        struct dvd_host_send_rpcstate   hrpcs;
 688        struct dvd_lu_send_rpcstate     lrpcs;
 689} dvd_authinfo;
 690
 691struct request_sense {
 692#if defined(__BIG_ENDIAN_BITFIELD)
 693        __u8 valid              : 1;
 694        __u8 error_code         : 7;
 695#elif defined(__LITTLE_ENDIAN_BITFIELD)
 696        __u8 error_code         : 7;
 697        __u8 valid              : 1;
 698#endif
 699        __u8 segment_number;
 700#if defined(__BIG_ENDIAN_BITFIELD)
 701        __u8 reserved1          : 2;
 702        __u8 ili                : 1;
 703        __u8 reserved2          : 1;
 704        __u8 sense_key          : 4;
 705#elif defined(__LITTLE_ENDIAN_BITFIELD)
 706        __u8 sense_key          : 4;
 707        __u8 reserved2          : 1;
 708        __u8 ili                : 1;
 709        __u8 reserved1          : 2;
 710#endif
 711        __u8 information[4];
 712        __u8 add_sense_len;
 713        __u8 command_info[4];
 714        __u8 asc;
 715        __u8 ascq;
 716        __u8 fruc;
 717        __u8 sks[3];
 718        __u8 asb[46];
 719};
 720
 721/*
 722 * feature profile
 723 */
 724#define CDF_RWRT        0x0020  /* "Random Writable" */
 725#define CDF_HWDM        0x0024  /* "Hardware Defect Management" */
 726#define CDF_MRW         0x0028
 727
 728/*
 729 * media status bits
 730 */
 731#define CDM_MRW_NOTMRW                  0
 732#define CDM_MRW_BGFORMAT_INACTIVE       1
 733#define CDM_MRW_BGFORMAT_ACTIVE         2
 734#define CDM_MRW_BGFORMAT_COMPLETE       3
 735
 736/*
 737 * mrw address spaces
 738 */
 739#define MRW_LBA_DMA                     0
 740#define MRW_LBA_GAA                     1
 741
 742/*
 743 * mrw mode pages (first is deprecated) -- probed at init time and
 744 * cdi->mrw_mode_page is set
 745 */
 746#define MRW_MODE_PC_PRE1                0x2c
 747#define MRW_MODE_PC                     0x03
 748
 749struct mrw_feature_desc {
 750        __u16 feature_code;
 751#if defined(__BIG_ENDIAN_BITFIELD)
 752        __u8 reserved1          : 2;
 753        __u8 feature_version    : 4;
 754        __u8 persistent         : 1;
 755        __u8 curr               : 1;
 756#elif defined(__LITTLE_ENDIAN_BITFIELD)
 757        __u8 curr               : 1;
 758        __u8 persistent         : 1;
 759        __u8 feature_version    : 4;
 760        __u8 reserved1          : 2;
 761#endif
 762        __u8 add_len;
 763#if defined(__BIG_ENDIAN_BITFIELD)
 764        __u8 reserved2          : 7;
 765        __u8 write              : 1;
 766#elif defined(__LITTLE_ENDIAN_BITFIELD)
 767        __u8 write              : 1;
 768        __u8 reserved2          : 7;
 769#endif
 770        __u8 reserved3;
 771        __u8 reserved4;
 772        __u8 reserved5;
 773};
 774
 775/* cf. mmc4r02g.pdf 5.3.10 Random Writable Feature (0020h) pg 197 of 635 */
 776struct rwrt_feature_desc {
 777        __u16 feature_code;
 778#if defined(__BIG_ENDIAN_BITFIELD)
 779        __u8 reserved1          : 2;
 780        __u8 feature_version    : 4;
 781        __u8 persistent         : 1;
 782        __u8 curr               : 1;
 783#elif defined(__LITTLE_ENDIAN_BITFIELD)
 784        __u8 curr               : 1;
 785        __u8 persistent         : 1;
 786        __u8 feature_version    : 4;
 787        __u8 reserved1          : 2;
 788#endif
 789        __u8 add_len;
 790        __u32 last_lba;
 791        __u32 block_size;
 792        __u16 blocking;
 793#if defined(__BIG_ENDIAN_BITFIELD)
 794        __u8 reserved2          : 7;
 795        __u8 page_present       : 1;
 796#elif defined(__LITTLE_ENDIAN_BITFIELD)
 797        __u8 page_present       : 1;
 798        __u8 reserved2          : 7;
 799#endif
 800        __u8 reserved3;
 801};
 802
 803typedef struct {
 804        __u16 disc_information_length;
 805#if defined(__BIG_ENDIAN_BITFIELD)
 806        __u8 reserved1                  : 3;
 807        __u8 erasable                   : 1;
 808        __u8 border_status              : 2;
 809        __u8 disc_status                : 2;
 810#elif defined(__LITTLE_ENDIAN_BITFIELD)
 811        __u8 disc_status                : 2;
 812        __u8 border_status              : 2;
 813        __u8 erasable                   : 1;
 814        __u8 reserved1                  : 3;
 815#else
 816#error "Please fix <asm/byteorder.h>"
 817#endif
 818        __u8 n_first_track;
 819        __u8 n_sessions_lsb;
 820        __u8 first_track_lsb;
 821        __u8 last_track_lsb;
 822#if defined(__BIG_ENDIAN_BITFIELD)
 823        __u8 did_v                      : 1;
 824        __u8 dbc_v                      : 1;
 825        __u8 uru                        : 1;
 826        __u8 reserved2                  : 2;
 827        __u8 dbit                       : 1;
 828        __u8 mrw_status                 : 2;
 829#elif defined(__LITTLE_ENDIAN_BITFIELD)
 830        __u8 mrw_status                 : 2;
 831        __u8 dbit                       : 1;
 832        __u8 reserved2                  : 2;
 833        __u8 uru                        : 1;
 834        __u8 dbc_v                      : 1;
 835        __u8 did_v                      : 1;
 836#endif
 837        __u8 disc_type;
 838        __u8 n_sessions_msb;
 839        __u8 first_track_msb;
 840        __u8 last_track_msb;
 841        __u32 disc_id;
 842        __u32 lead_in;
 843        __u32 lead_out;
 844        __u8 disc_bar_code[8];
 845        __u8 reserved3;
 846        __u8 n_opc;
 847} disc_information;
 848
 849typedef struct {
 850        __u16 track_information_length;
 851        __u8 track_lsb;
 852        __u8 session_lsb;
 853        __u8 reserved1;
 854#if defined(__BIG_ENDIAN_BITFIELD)
 855        __u8 reserved2                  : 2;
 856        __u8 damage                     : 1;
 857        __u8 copy                       : 1;
 858        __u8 track_mode                 : 4;
 859        __u8 rt                         : 1;
 860        __u8 blank                      : 1;
 861        __u8 packet                     : 1;
 862        __u8 fp                         : 1;
 863        __u8 data_mode                  : 4;
 864        __u8 reserved3                  : 6;
 865        __u8 lra_v                      : 1;
 866        __u8 nwa_v                      : 1;
 867#elif defined(__LITTLE_ENDIAN_BITFIELD)
 868        __u8 track_mode                 : 4;
 869        __u8 copy                       : 1;
 870        __u8 damage                     : 1;
 871        __u8 reserved2                  : 2;
 872        __u8 data_mode                  : 4;
 873        __u8 fp                         : 1;
 874        __u8 packet                     : 1;
 875        __u8 blank                      : 1;
 876        __u8 rt                         : 1;
 877        __u8 nwa_v                      : 1;
 878        __u8 lra_v                      : 1;
 879        __u8 reserved3                  : 6;
 880#endif
 881        __u32 track_start;
 882        __u32 next_writable;
 883        __u32 free_blocks;
 884        __u32 fixed_packet_size;
 885        __u32 track_size;
 886        __u32 last_rec_address;
 887} track_information;
 888
 889struct feature_header {
 890        __u32 data_len;
 891        __u8 reserved1;
 892        __u8 reserved2;
 893        __u16 curr_profile;
 894};
 895
 896struct mode_page_header {
 897        __u16 mode_data_length;
 898        __u8 medium_type;
 899        __u8 reserved1;
 900        __u8 reserved2;
 901        __u8 reserved3;
 902        __u16 desc_length;
 903};
 904
 905#ifdef __KERNEL__
 906#include <linux/fs.h>           /* not really needed, later.. */
 907#include <linux/device.h>
 908
 909struct packet_command
 910{
 911        unsigned char           cmd[CDROM_PACKET_SIZE];
 912        unsigned char           *buffer;
 913        unsigned int            buflen;
 914        int                     stat;
 915        struct request_sense    *sense;
 916        unsigned char           data_direction;
 917        int                     quiet;
 918        int                     timeout;
 919        void                    *reserved[1];
 920};
 921
 922/*
 923 * _OLD will use PIO transfer on atapi devices, _BPC_* will use DMA
 924 */
 925#define CDDA_OLD                0       /* old style */
 926#define CDDA_BPC_SINGLE         1       /* single frame block pc */
 927#define CDDA_BPC_FULL           2       /* multi frame block pc */
 928
 929/* Uniform cdrom data structures for cdrom.c */
 930struct cdrom_device_info {
 931        struct cdrom_device_ops  *ops;  /* link to device_ops */
 932        struct cdrom_device_info *next; /* next device_info for this major */
 933        struct gendisk *disk;           /* matching block layer disk */
 934        void *handle;                   /* driver-dependent data */
 935/* specifications */
 936        int mask;                       /* mask of capability: disables them */
 937        int speed;                      /* maximum speed for reading data */
 938        int capacity;                   /* number of discs in jukebox */
 939/* device-related storage */
 940        int options             : 30;   /* options flags */
 941        unsigned mc_flags       : 2;    /* media change buffer flags */
 942        int use_count;                  /* number of times device opened */
 943        char name[20];                  /* name of the device type */
 944/* per-device flags */
 945        __u8 sanyo_slot         : 2;    /* Sanyo 3 CD changer support */
 946        __u8 reserved           : 6;    /* not used yet */
 947        int cdda_method;                /* see flags */
 948        __u8 last_sense;
 949        int for_data;
 950        int (*exit)(struct cdrom_device_info *);
 951        int mrw_mode_page;
 952};
 953
 954struct cdrom_device_ops {
 955/* routines */
 956        int (*open) (struct cdrom_device_info *, int);
 957        void (*release) (struct cdrom_device_info *);
 958        int (*drive_status) (struct cdrom_device_info *, int);
 959        int (*media_changed) (struct cdrom_device_info *, int);
 960        int (*tray_move) (struct cdrom_device_info *, int);
 961        int (*lock_door) (struct cdrom_device_info *, int);
 962        int (*select_speed) (struct cdrom_device_info *, int);
 963        int (*select_disc) (struct cdrom_device_info *, int);
 964        int (*get_last_session) (struct cdrom_device_info *,
 965                                 struct cdrom_multisession *);
 966        int (*get_mcn) (struct cdrom_device_info *,
 967                        struct cdrom_mcn *);
 968        /* hard reset device */
 969        int (*reset) (struct cdrom_device_info *);
 970        /* play stuff */
 971        int (*audio_ioctl) (struct cdrom_device_info *,unsigned int, void *);
 972        /* dev-specific */
 973        int (*dev_ioctl) (struct cdrom_device_info *,
 974                          unsigned int, unsigned long);
 975/* driver specifications */
 976        const int capability;   /* capability flags */
 977        int n_minors;           /* number of active minor devices */
 978        /* handle uniform packets for scsi type devices (scsi,atapi) */
 979        int (*generic_packet) (struct cdrom_device_info *,
 980                               struct packet_command *);
 981};
 982
 983/* the general block_device operations structure: */
 984extern int cdrom_open(struct cdrom_device_info *cdi, struct inode *ip,
 985                        struct file *fp);
 986extern int cdrom_release(struct cdrom_device_info *cdi, struct file *fp);
 987extern int cdrom_ioctl(struct file *file, struct cdrom_device_info *cdi,
 988                struct inode *ip, unsigned int cmd, unsigned long arg);
 989extern int cdrom_media_changed(struct cdrom_device_info *);
 990
 991extern int register_cdrom(struct cdrom_device_info *cdi);
 992extern int unregister_cdrom(struct cdrom_device_info *cdi);
 993
 994typedef struct {
 995    int data;
 996    int audio;
 997    int cdi;
 998    int xa;
 999    long error;
1000} tracktype;

1001
1002extern int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written);
1003extern int cdrom_number_of_slots(struct cdrom_device_info *cdi);
1004extern int cdrom_mode_select(struct cdrom_device_info *cdi,
1005                             struct packet_command *cgc);
1006extern int cdrom_mode_sense(struct cdrom_device_info *cdi,
1007                            struct packet_command *cgc,
1008                            int page_code, int page_control);
1009extern void init_cdrom_command(struct packet_command *cgc,
1010                               void *buffer, int len, int type);
1011
1012/* The SCSI spec says there could be 256 slots. */
1013#define CDROM_MAX_SLOTS 256
1014
1015struct cdrom_mechstat_header {
1016#if defined(__BIG_ENDIAN_BITFIELD)
1017        __u8 fault         : 1;
1018        __u8 changer_state : 2;
1019        __u8 curslot       : 5;
1020        __u8 mech_state    : 3;
1021        __u8 door_open     : 1;
1022        __u8 reserved1     : 4;
1023#elif defined(__LITTLE_ENDIAN_BITFIELD)
1024        __u8 curslot       : 5;
1025        __u8 changer_state : 2;
1026        __u8 fault         : 1;
1027        __u8 reserved1     : 4;
1028        __u8 door_open     : 1;
1029        __u8 mech_state    : 3;
1030#endif
1031        __u8     curlba[3];
1032        __u8     nslots;
1033        __u16 slot_tablelen;
1034};
1035
1036struct cdrom_slot {
1037#if defined(__BIG_ENDIAN_BITFIELD)
1038        __u8 disc_present : 1;
1039        __u8 reserved1    : 6;
1040        __u8 change       : 1;
1041#elif defined(__LITTLE_ENDIAN_BITFIELD)
1042        __u8 change       : 1;
1043        __u8 reserved1    : 6;
1044        __u8 disc_present : 1;
1045#endif
1046        __u8 reserved2[3];
1047};
1048
1049struct cdrom_changer_info {
1050        struct cdrom_mechstat_header hdr;
1051        struct cdrom_slot slots[CDROM_MAX_SLOTS];
1052};
1053
1054typedef enum {
1055        mechtype_caddy = 0,
1056        mechtype_tray  = 1,
1057        mechtype_popup = 2,
1058        mechtype_individual_changer = 4,
1059        mechtype_cartridge_changer  = 5
1060} mechtype_t;
1061
1062typedef struct {
1063#if defined(__BIG_ENDIAN_BITFIELD)
1064        __u8 ps                 : 1;
1065        __u8 reserved1          : 1;
1066        __u8 page_code          : 6;
1067        __u8 page_length;
1068        __u8 reserved2          : 1;
1069        __u8 bufe               : 1;
1070        __u8 ls_v               : 1;
1071        __u8 test_write         : 1;
1072        __u8 write_type         : 4;
1073        __u8 multi_session      : 2; /* or border, DVD */
1074        __u8 fp                 : 1;
1075        __u8 copy               : 1;
1076        __u8 track_mode         : 4;
1077        __u8 reserved3          : 4;
1078        __u8 data_block_type    : 4;
1079#elif defined(__LITTLE_ENDIAN_BITFIELD)
1080        __u8 page_code          : 6;
1081        __u8 reserved1          : 1;
1082        __u8 ps                 : 1;
1083        __u8 page_length;
1084        __u8 write_type         : 4;
1085        __u8 test_write         : 1;
1086        __u8 ls_v               : 1;
1087        __u8 bufe               : 1;
1088        __u8 reserved2          : 1;
1089        __u8 track_mode         : 4;
1090        __u8 copy               : 1;
1091        __u8 fp                 : 1;
1092        __u8 multi_session      : 2; /* or border, DVD */
1093        __u8 data_block_type    : 4;
1094        __u8 reserved3          : 4;
1095#endif
1096        __u8 link_size;
1097        __u8 reserved4;
1098#if defined(__BIG_ENDIAN_BITFIELD)
1099        __u8 reserved5          : 2;
1100        __u8 app_code           : 6;
1101#elif defined(__LITTLE_ENDIAN_BITFIELD)
1102        __u8 app_code           : 6;
1103        __u8 reserved5          : 2;
1104#endif
1105        __u8 session_format;
1106        __u8 reserved6;
1107        __u32 packet_size;
1108        __u16 audio_pause;
1109        __u8 mcn[16];
1110        __u8 isrc[16];
1111        __u8 subhdr0;
1112        __u8 subhdr1;
1113        __u8 subhdr2;
1114        __u8 subhdr3;
1115} __attribute__((packed)) write_param_page;
1116
1117struct modesel_head
1118{
1119        __u8    reserved1;
1120        __u8    medium;
1121        __u8    reserved2;
1122        __u8    block_desc_length;
1123        __u8    density;
1124        __u8    number_of_blocks_hi;
1125        __u8    number_of_blocks_med;
1126        __u8    number_of_blocks_lo;
1127        __u8    reserved3;
1128        __u8    block_length_hi;
1129        __u8    block_length_med;
1130        __u8    block_length_lo;
1131};
1132
1133typedef struct {
1134        __u16 report_key_length;
1135        __u8 reserved1;
1136        __u8 reserved2;
1137#if defined(__BIG_ENDIAN_BITFIELD)
1138        __u8 type_code                  : 2;
1139        __u8 vra                        : 3;
1140        __u8 ucca                       : 3;
1141#elif defined(__LITTLE_ENDIAN_BITFIELD)
1142        __u8 ucca                       : 3;
1143        __u8 vra                        : 3;
1144        __u8 type_code                  : 2;
1145#endif
1146        __u8 region_mask;
1147        __u8 rpc_scheme;
1148        __u8 reserved3;
1149} rpc_state_t;
1150
1151struct event_header {
1152        __u16 data_len;
1153#if defined(__BIG_ENDIAN_BITFIELD)
1154        __u8 nea                : 1;
1155        __u8 reserved1          : 4;
1156        __u8 notification_class : 3;
1157#elif defined(__LITTLE_ENDIAN_BITFIELD)
1158        __u8 notification_class : 3;
1159        __u8 reserved1          : 4;
1160        __u8 nea                : 1;
1161#endif
1162        __u8 supp_event_class;
1163};
1164
1165struct media_event_desc {
1166#if defined(__BIG_ENDIAN_BITFIELD)
1167        __u8 reserved1          : 4;
1168        __u8 media_event_code   : 4;
1169        __u8 reserved2          : 6;
1170        __u8 media_present      : 1;
1171        __u8 door_open          : 1;
1172#elif defined(__LITTLE_ENDIAN_BITFIELD)
1173        __u8 media_event_code   : 4;
1174        __u8 reserved1          : 4;
1175        __u8 door_open          : 1;
1176        __u8 media_present      : 1;
1177        __u8 reserved2          : 6;
1178#endif
1179        __u8 start_slot;
1180        __u8 end_slot;
1181};
1182
1183extern int cdrom_get_media_event(struct cdrom_device_info *cdi, struct media_event_desc *med);
1184extern int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write);
1185extern int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write);
1186
1187#endif  /* End of kernel only stuff */ 
1188
1189#endif  /* _LINUX_CDROM_H */
1190