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/*

 * -- <linux/cdrom.h>

 * General header file for linux CD-ROM drivers

 * Copyright (C) 1992         David Giller, rafetmad@oxy.edu

 *               1994, 1995   Eberhard Mönkeberg, emoenke@gwdg.de

 *               1996         David van Leeuwen, david@tm.tno.nl

 *               1997, 1998   Erik Andersen, andersee@debian.org

 *               1998-2002    Jens Axboe, axboe@suse.de

 */

#ifndef _LINUX_CDROM_H

#define _LINUX_CDROM_H

#include <asm/byteorder.h>

/*******************************************************

 * As of Linux 2.1.x, all Linux CD-ROM application programs will use this

 * (and only this) include file.  It is my hope to provide Linux with

 * a uniform interface between software accessing CD-ROMs and the various

 * device drivers that actually talk to the drives.  There may still be

 * 23 different kinds of strange CD-ROM drives, but at least there will

 * now be one, and only one, Linux CD-ROM interface.

 *

 * Additionally, as of Linux 2.1.x, all Linux application programs

 * should use the O_NONBLOCK option when opening a CD-ROM device

 * for subsequent ioctl commands.  This allows for neat system errors

 * like "No medium found" or "Wrong medium type" upon attempting to

 * mount or play an empty slot, mount an audio disc, or play a data disc.

 * Generally, changing an application program to support O_NONBLOCK

 * is as easy as the following:

 *       -    drive = open("/dev/cdrom", O_RDONLY);

 *       +    drive = open("/dev/cdrom", O_RDONLY | O_NONBLOCK);

 * It is worth the small change.

 *

 *  Patches for many common CD programs (provided by David A. van Leeuwen)

 *  can be found at:  ftp://ftp.gwdg.de/pub/linux/cdrom/drivers/cm206/

 *

 *******************************************************/

/* When a driver supports a certain function, but the cdrom drive we are

 * using doesn't, we will return the error EDRIVE_CANT_DO_THIS.  We will

 * borrow the "Operation not supported" error from the network folks to

 * accomplish this.  Maybe someday we will get a more targeted error code,

 * but this will do for now... */

#define EDRIVE_CANT_DO_THIS  EOPNOTSUPP

/*******************************************************

 * The CD-ROM IOCTL commands  -- these should be supported by

 * all the various cdrom drivers.  For the CD-ROM ioctls, we

 * will commandeer byte 0x53, or 'S'.

 *******************************************************/

#define CDROMPAUSE              0x5301 /* Pause Audio Operation */ 

#define CDROMRESUME             0x5302 /* Resume paused Audio Operation */

#define CDROMPLAYMSF            0x5303 /* Play Audio MSF (struct cdrom_msf) */

#define CDROMPLAYTRKIND         0x5304 /* Play Audio Track/index 

                                           (struct cdrom_ti) */

#define CDROMREADTOCHDR         0x5305 /* Read TOC header 

                                           (struct cdrom_tochdr) */

#define CDROMREADTOCENTRY       0x5306 /* Read TOC entry 

                                           (struct cdrom_tocentry) */

#define CDROMSTOP               0x5307 /* Stop the cdrom drive */

#define CDROMSTART              0x5308 /* Start the cdrom drive */

#define CDROMEJECT              0x5309 /* Ejects the cdrom media */

#define CDROMVOLCTRL            0x530a /* Control output volume 

                                           (struct cdrom_volctrl) */

#define CDROMSUBCHNL            0x530b /* Read subchannel data 

                                           (struct cdrom_subchnl) */

#define CDROMREADMODE2          0x530c /* Read CDROM mode 2 data (2336 Bytes) 

                                           (struct cdrom_read) */

#define CDROMREADMODE1          0x530d /* Read CDROM mode 1 data (2048 Bytes)

                                           (struct cdrom_read) */

#define CDROMREADAUDIO          0x530e /* (struct cdrom_read_audio) */

#define CDROMEJECT_SW           0x530f /* enable(1)/disable(0) auto-ejecting */

#define CDROMMULTISESSION       0x5310 /* Obtain the start-of-last-session 

                                           address of multi session disks

                                           (struct cdrom_multisession) */

#define CDROM_GET_MCN           0x5311 /* Obtain the "Universal Product Code" 

                                           if available (struct cdrom_mcn) */

#define CDROM_GET_UPC           CDROM_GET_MCN  /* This one is deprecated, 

                                          but here anyway for compatibility */

#define CDROMRESET              0x5312 /* hard-reset the drive */

#define CDROMVOLREAD            0x5313 /* Get the drive's volume setting 

                                          (struct cdrom_volctrl) */

#define CDROMREADRAW            0x5314  /* read data in raw mode (2352 Bytes)

                                           (struct cdrom_read) */

/*

 * These ioctls are used only used in aztcd.c and optcd.c

 */

#define CDROMREADCOOKED         0x5315  /* read data in cooked mode */

#define CDROMSEEK               0x5316  /* seek msf address */

/*

 * This ioctl is only used by the scsi-cd driver.

   It is for playing audio in logical block addressing mode.

 */

#define CDROMPLAYBLK            0x5317  /* (struct cdrom_blk) */

/*

 * These ioctls are only used in optcd.c

 */

#define CDROMREADALL            0x5318  /* read all 2646 bytes */

/*

 * These ioctls are (now) only in ide-cd.c for controlling

 * drive spindown time.  They should be implemented in the

 * Uniform driver, via generic packet commands, GPCMD_MODE_SELECT_10,

 * GPCMD_MODE_SENSE_10 and the GPMODE_POWER_PAGE...

 *  -Erik

 */

#define CDROMGETSPINDOWN        0x531d

#define CDROMSETSPINDOWN        0x531e

/*

 * These ioctls are implemented through the uniform CD-ROM driver

 * They _will_ be adopted by all CD-ROM drivers, when all the CD-ROM

 * drivers are eventually ported to the uniform CD-ROM driver interface.

 */

#define CDROMCLOSETRAY          0x5319  /* pendant of CDROMEJECT */

#define CDROM_SET_OPTIONS       0x5320  /* Set behavior options */

#define CDROM_CLEAR_OPTIONS     0x5321  /* Clear behavior options */

#define CDROM_SELECT_SPEED      0x5322  /* Set the CD-ROM speed */

#define CDROM_SELECT_DISC       0x5323  /* Select disc (for juke-boxes) */

#define CDROM_MEDIA_CHANGED     0x5325  /* Check is media changed  */

#define CDROM_DRIVE_STATUS      0x5326  /* Get tray position, etc. */

#define CDROM_DISC_STATUS       0x5327  /* Get disc type, etc. */

#define CDROM_CHANGER_NSLOTS    0x5328  /* Get number of slots */

#define CDROM_LOCKDOOR          0x5329  /* lock or unlock door */

#define CDROM_DEBUG             0x5330  /* Turn debug messages on/off */

#define CDROM_GET_CAPABILITY    0x5331  /* get capabilities */

/* Note that scsi/scsi_ioctl.h also uses 0x5382 - 0x5386.

 * Future CDROM ioctls should be kept below 0x537F

 */

/* This ioctl is only used by sbpcd at the moment */

#define CDROMAUDIOBUFSIZ        0x5382  /* set the audio buffer size */

                                        /* conflict with SCSI_IOCTL_GET_IDLUN */

/* DVD-ROM Specific ioctls */

#define DVD_READ_STRUCT         0x5390  /* Read structure */

#define DVD_WRITE_STRUCT        0x5391  /* Write structure */

#define DVD_AUTH                0x5392  /* Authentication */

#define CDROM_SEND_PACKET       0x5393  /* send a packet to the drive */

#define CDROM_NEXT_WRITABLE     0x5394  /* get next writable block */

#define CDROM_LAST_WRITTEN      0x5395  /* get last block written on disc */

/*******************************************************

 * CDROM IOCTL structures

 *******************************************************/

/* Address in MSF format */

struct cdrom_msf0

{

        __u8    minute;

        __u8    second;

        __u8    frame;

};

/* Address in either MSF or logical format */

union cdrom_addr

{

        struct cdrom_msf0       msf;

        int                     lba;

};

/* This struct is used by the CDROMPLAYMSF ioctl */

struct cdrom_msf

{

        __u8    cdmsf_min0;     /* start minute */

        __u8    cdmsf_sec0;     /* start second */

        __u8    cdmsf_frame0;   /* start frame */

        __u8    cdmsf_min1;     /* end minute */

        __u8    cdmsf_sec1;     /* end second */

        __u8    cdmsf_frame1;   /* end frame */

};

/* This struct is used by the CDROMPLAYTRKIND ioctl */

struct cdrom_ti

{

        __u8    cdti_trk0;      /* start track */

        __u8    cdti_ind0;      /* start index */

        __u8    cdti_trk1;      /* end track */

        __u8    cdti_ind1;      /* end index */

};

/* This struct is used by the CDROMREADTOCHDR ioctl */

struct cdrom_tochdr

{

        __u8    cdth_trk0;      /* start track */

        __u8    cdth_trk1;      /* end track */

};

/* This struct is used by the CDROMVOLCTRL and CDROMVOLREAD ioctls */

struct cdrom_volctrl

{

        __u8    channel0;

        __u8    channel1;

        __u8    channel2;

        __u8    channel3;

};

/* This struct is used by the CDROMSUBCHNL ioctl */

struct cdrom_subchnl

{

        __u8    cdsc_format;

        __u8    cdsc_audiostatus;

        __u8    cdsc_adr:       4;

        __u8    cdsc_ctrl:      4;

        __u8    cdsc_trk;

        __u8    cdsc_ind;

        union cdrom_addr cdsc_absaddr;

        union cdrom_addr cdsc_reladdr;

};

/* This struct is used by the CDROMREADTOCENTRY ioctl */

struct cdrom_tocentry

{

        __u8    cdte_track;

        __u8    cdte_adr        :4;

        __u8    cdte_ctrl       :4;

        __u8    cdte_format;

        union cdrom_addr cdte_addr;

        __u8    cdte_datamode;

};

/* This struct is used by the CDROMREADMODE1, and CDROMREADMODE2 ioctls */

struct cdrom_read

{

        int     cdread_lba;

        char    *cdread_bufaddr;

        int     cdread_buflen;

};

/* This struct is used by the CDROMREADAUDIO ioctl */

struct cdrom_read_audio

{

        union cdrom_addr addr; /* frame address */

        __u8 addr_format;      /* CDROM_LBA or CDROM_MSF */

        int nframes;           /* number of 2352-byte-frames to read at once */

        __u8 __user *buf;      /* frame buffer (size: nframes*2352 bytes) */

};

/* This struct is used with the CDROMMULTISESSION ioctl */

struct cdrom_multisession

{

        union cdrom_addr addr; /* frame address: start-of-last-session

                                   (not the new "frame 16"!).  Only valid

                                   if the "xa_flag" is true. */

        __u8 xa_flag;        /* 1: "is XA disk" */

        __u8 addr_format;    /* CDROM_LBA or CDROM_MSF */

};

/* This struct is used with the CDROM_GET_MCN ioctl.

 * Very few audio discs actually have Universal Product Code information,

 * which should just be the Medium Catalog Number on the box.  Also note

 * that the way the codeis written on CD is _not_ uniform across all discs!

 */

struct cdrom_mcn

{

  __u8 medium_catalog_number[14]; /* 13 ASCII digits, null-terminated */

};

/* This is used by the CDROMPLAYBLK ioctl */

struct cdrom_blk

{

        unsigned from;

        unsigned short len;

};

#define CDROM_PACKET_SIZE       12

#define CGC_DATA_UNKNOWN        0

#define CGC_DATA_WRITE          1

#define CGC_DATA_READ           2

#define CGC_DATA_NONE           3

/* for CDROM_PACKET_COMMAND ioctl */

struct cdrom_generic_command

{

        unsigned char           cmd[CDROM_PACKET_SIZE];

        unsigned char           __user *buffer;

        unsigned int            buflen;

        int                     stat;

        struct request_sense    __user *sense;

        unsigned char           data_direction;

        int                     quiet;

        int                     timeout;

        void                    __user *reserved[1];    /* unused, actually */

};

/*

 * A CD-ROM physical sector size is 2048, 2052, 2056, 2324, 2332, 2336,

 * 2340, or 2352 bytes long.

*         Sector types of the standard CD-ROM data formats:

 *

 * format   sector type               user data size (bytes)

 * -----------------------------------------------------------------------------

 *   1     (Red Book)    CD-DA          2352    (CD_FRAMESIZE_RAW)

 *   2     (Yellow Book) Mode1 Form1    2048    (CD_FRAMESIZE)

 *   3     (Yellow Book) Mode1 Form2    2336    (CD_FRAMESIZE_RAW0)

 *   4     (Green Book)  Mode2 Form1    2048    (CD_FRAMESIZE)

 *   5     (Green Book)  Mode2 Form2    2328    (2324+4 spare bytes)

 *

 *

 *       The layout of the standard CD-ROM data formats:

 * -----------------------------------------------------------------------------

 * - audio (red):                  | audio_sample_bytes |

 *                                 |        2352        |

 *

 * - data (yellow, mode1):         | sync - head - data - EDC - zero - ECC |

 *                                 |  12  -   4  - 2048 -  4  -   8  - 276 |

 *

 * - data (yellow, mode2):         | sync - head - data |

 *                                 |  12  -   4  - 2336 |

 *

 * - XA data (green, mode2 form1): | sync - head - sub - data - EDC - ECC |

 *                                 |  12  -   4  -  8  - 2048 -  4  - 276 |

 *

 * - XA data (green, mode2 form2): | sync - head - sub - data - Spare |

 *                                 |  12  -   4  -  8  - 2324 -  4    |

 *

 */

/* Some generally useful CD-ROM information -- mostly based on the above */

#define CD_MINS              74 /* max. minutes per CD, not really a limit */

#define CD_SECS              60 /* seconds per minute */

#define CD_FRAMES            75 /* frames per second */

#define CD_SYNC_SIZE         12 /* 12 sync bytes per raw data frame */

#define CD_MSF_OFFSET       150 /* MSF numbering offset of first frame */

#define CD_CHUNK_SIZE        24 /* lowest-level "data bytes piece" */

#define CD_NUM_OF_CHUNKS     98 /* chunks per frame */

#define CD_FRAMESIZE_SUB     96 /* subchannel data "frame" size */

#define CD_HEAD_SIZE          4 /* header (address) bytes per raw data frame */

#define CD_SUBHEAD_SIZE       8 /* subheader bytes per raw XA data frame */

#define CD_EDC_SIZE           4 /* bytes EDC per most raw data frame types */

#define CD_ZERO_SIZE          8 /* bytes zero per yellow book mode 1 frame */

#define CD_ECC_SIZE         276 /* bytes ECC per most raw data frame types */

#define CD_FRAMESIZE       2048 /* bytes per frame, "cooked" mode */

#define CD_FRAMESIZE_RAW   2352 /* bytes per frame, "raw" mode */

#define CD_FRAMESIZE_RAWER 2646 /* The maximum possible returned bytes */ 

/* most drives don't deliver everything: */

#define CD_FRAMESIZE_RAW1 (CD_FRAMESIZE_RAW-CD_SYNC_SIZE) /*2340*/

#define CD_FRAMESIZE_RAW0 (CD_FRAMESIZE_RAW-CD_SYNC_SIZE-CD_HEAD_SIZE) /*2336*/

#define CD_XA_HEAD        (CD_HEAD_SIZE+CD_SUBHEAD_SIZE) /* "before data" part of raw XA frame */

#define CD_XA_TAIL        (CD_EDC_SIZE+CD_ECC_SIZE) /* "after data" part of raw XA frame */

#define CD_XA_SYNC_HEAD   (CD_SYNC_SIZE+CD_XA_HEAD) /* sync bytes + header of XA frame */

/* CD-ROM address types (cdrom_tocentry.cdte_format) */

#define CDROM_LBA 0x01 /* "logical block": first frame is #0 */

#define CDROM_MSF 0x02 /* "minute-second-frame": binary, not bcd here! */

/* bit to tell whether track is data or audio (cdrom_tocentry.cdte_ctrl) */

#define CDROM_DATA_TRACK        0x04

/* The leadout track is always 0xAA, regardless of # of tracks on disc */

#define CDROM_LEADOUT           0xAA

/* audio states (from SCSI-2, but seen with other drives, too) */

#define CDROM_AUDIO_INVALID     0x00    /* audio status not supported */

#define CDROM_AUDIO_PLAY        0x11    /* audio play operation in progress */

#define CDROM_AUDIO_PAUSED      0x12    /* audio play operation paused */

#define CDROM_AUDIO_COMPLETED   0x13    /* audio play successfully completed */

#define CDROM_AUDIO_ERROR       0x14    /* audio play stopped due to error */

#define CDROM_AUDIO_NO_STATUS   0x15    /* no current audio status to return */

/* capability flags used with the uniform CD-ROM driver */

#define CDC_CLOSE_TRAY          0x1     /* caddy systems _can't_ close */

#define CDC_OPEN_TRAY           0x2     /* but _can_ eject.  */

#define CDC_LOCK                0x4     /* disable manual eject */

#define CDC_SELECT_SPEED        0x8     /* programmable speed */

#define CDC_SELECT_DISC         0x10    /* select disc from juke-box */

#define CDC_MULTI_SESSION       0x20    /* read sessions>1 */

#define CDC_MCN                 0x40    /* Medium Catalog Number */

#define CDC_MEDIA_CHANGED       0x80    /* media changed */

#define CDC_PLAY_AUDIO          0x100   /* audio functions */

#define CDC_RESET               0x200   /* hard reset device */

#define CDC_DRIVE_STATUS        0x800   /* driver implements drive status */

#define CDC_GENERIC_PACKET      0x1000  /* driver implements generic packets */

#define CDC_CD_R                0x2000  /* drive is a CD-R */

#define CDC_CD_RW               0x4000  /* drive is a CD-RW */

#define CDC_DVD                 0x8000  /* drive is a DVD */

#define CDC_DVD_R               0x10000 /* drive can write DVD-R */

#define CDC_DVD_RAM             0x20000 /* drive can write DVD-RAM */

#define CDC_MO_DRIVE            0x40000 /* drive is an MO device */

#define CDC_MRW                 0x80000 /* drive can read MRW */

#define CDC_MRW_W               0x100000 /* drive can write MRW */

#define CDC_RAM                 0x200000 /* ok to open for WRITE */

/* drive status possibilities returned by CDROM_DRIVE_STATUS ioctl */

#define CDS_NO_INFO             0        /* if not implemented */

#define CDS_NO_DISC             1

#define CDS_TRAY_OPEN           2

#define CDS_DRIVE_NOT_READY     3

#define CDS_DISC_OK             4

/* return values for the CDROM_DISC_STATUS ioctl */

/* can also return CDS_NO_[INFO|DISC], from above */

#define CDS_AUDIO               100

#define CDS_DATA_1              101

#define CDS_DATA_2              102

#define CDS_XA_2_1              103

#define CDS_XA_2_2              104

#define CDS_MIXED               105

/* User-configurable behavior options for the uniform CD-ROM driver */

#define CDO_AUTO_CLOSE          0x1     /* close tray on first open() */

#define CDO_AUTO_EJECT          0x2     /* open tray on last release() */

#define CDO_USE_FFLAGS          0x4     /* use O_NONBLOCK information on open */

#define CDO_LOCK                0x8     /* lock tray on open files */

#define CDO_CHECK_TYPE          0x10    /* check type on open for data */

/* Special codes used when specifying changer slots. */

#define CDSL_NONE               (INT_MAX-1)

#define CDSL_CURRENT            INT_MAX

/* For partition based multisession access. IDE can handle 64 partitions

 * per drive - SCSI CD-ROM's use minors to differentiate between the

 * various drives, so we can't do multisessions the same way there.

 * Use the -o session=x option to mount on them.

 */

#define CD_PART_MAX             64

#define CD_PART_MASK            (CD_PART_MAX - 1)

/*********************************************************************

 * Generic Packet commands, MMC commands, and such

 *********************************************************************/

 /* The generic packet command opcodes for CD/DVD Logical Units,

 * From Table 57 of the SFF8090 Ver. 3 (Mt. Fuji) draft standard. */

#define GPCMD_BLANK                         0xa1

#define GPCMD_CLOSE_TRACK                   0x5b

#define GPCMD_FLUSH_CACHE                   0x35

#define GPCMD_FORMAT_UNIT                   0x04

#define GPCMD_GET_CONFIGURATION             0x46

#define GPCMD_GET_EVENT_STATUS_NOTIFICATION 0x4a

#define GPCMD_GET_PERFORMANCE               0xac

#define GPCMD_INQUIRY                       0x12

#define GPCMD_LOAD_UNLOAD                   0xa6

#define GPCMD_MECHANISM_STATUS              0xbd

#define GPCMD_MODE_SELECT_10                0x55

#define GPCMD_MODE_SENSE_10                 0x5a

#define GPCMD_PAUSE_RESUME                  0x4b

#define GPCMD_PLAY_AUDIO_10                 0x45

#define GPCMD_PLAY_AUDIO_MSF                0x47

#define GPCMD_PLAY_AUDIO_TI                 0x48

#define GPCMD_PLAY_CD                       0xbc

#define GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL  0x1e

#define GPCMD_READ_10                       0x28

#define GPCMD_READ_12                       0xa8

#define GPCMD_READ_BUFFER_CAPACITY          0x5c

#define GPCMD_READ_CDVD_CAPACITY            0x25

#define GPCMD_READ_CD                       0xbe

#define GPCMD_READ_CD_MSF                   0xb9

#define GPCMD_READ_DISC_INFO                0x51

#define GPCMD_READ_DVD_STRUCTURE            0xad

#define GPCMD_READ_FORMAT_CAPACITIES        0x23

#define GPCMD_READ_HEADER                   0x44

#define GPCMD_READ_TRACK_RZONE_INFO         0x52

#define GPCMD_READ_SUBCHANNEL               0x42

#define GPCMD_READ_TOC_PMA_ATIP             0x43

#define GPCMD_REPAIR_RZONE_TRACK            0x58

#define GPCMD_REPORT_KEY                    0xa4

#define GPCMD_REQUEST_SENSE                 0x03

#define GPCMD_RESERVE_RZONE_TRACK           0x53

#define GPCMD_SEND_CUE_SHEET                0x5d

#define GPCMD_SCAN                          0xba

#define GPCMD_SEEK                          0x2b

#define GPCMD_SEND_DVD_STRUCTURE            0xbf

#define GPCMD_SEND_EVENT                    0xa2

#define GPCMD_SEND_KEY                      0xa3

#define GPCMD_SEND_OPC                      0x54

#define GPCMD_SET_READ_AHEAD                0xa7

#define GPCMD_SET_STREAMING                 0xb6

#define GPCMD_START_STOP_UNIT               0x1b

#define GPCMD_STOP_PLAY_SCAN                0x4e

#define GPCMD_TEST_UNIT_READY               0x00

#define GPCMD_VERIFY_10                     0x2f

#define GPCMD_WRITE_10                      0x2a

#define GPCMD_WRITE_AND_VERIFY_10           0x2e

/* This is listed as optional in ATAPI 2.6, but is (curiously)

 * missing from Mt. Fuji, Table 57.  It _is_ mentioned in Mt. Fuji

 * Table 377 as an MMC command for SCSi devices though...  Most ATAPI

 * drives support it. */

#define GPCMD_SET_SPEED                     0xbb

/* This seems to be a SCSI specific CD-ROM opcode

 * to play data at track/index */

#define GPCMD_PLAYAUDIO_TI                  0x48

/*

 * From MS Media Status Notification Support Specification. For

 * older drives only.

 */

#define GPCMD_GET_MEDIA_STATUS              0xda

/* Mode page codes for mode sense/set */

#define GPMODE_VENDOR_PAGE              0x00

#define GPMODE_R_W_ERROR_PAGE           0x01

#define GPMODE_WRITE_PARMS_PAGE         0x05

#define GPMODE_WCACHING_PAGE            0x08

#define GPMODE_AUDIO_CTL_PAGE           0x0e

#define GPMODE_POWER_PAGE               0x1a

#define GPMODE_FAULT_FAIL_PAGE          0x1c

#define GPMODE_TO_PROTECT_PAGE          0x1d

#define GPMODE_CAPABILITIES_PAGE        0x2a

#define GPMODE_ALL_PAGES                0x3f

/* Not in Mt. Fuji, but in ATAPI 2.6 -- deprecated now in favor

 * of MODE_SENSE_POWER_PAGE */

#define GPMODE_CDROM_PAGE               0x0d

/* DVD struct types */

#define DVD_STRUCT_PHYSICAL     0x00

#define DVD_STRUCT_COPYRIGHT    0x01

#define DVD_STRUCT_DISCKEY      0x02

#define DVD_STRUCT_BCA          0x03

#define DVD_STRUCT_MANUFACT     0x04

struct dvd_layer {

        __u8 book_version       : 4;

        __u8 book_type          : 4;

        __u8 min_rate           : 4;

        __u8 disc_size          : 4;

        __u8 layer_type         : 4;

        __u8 track_path         : 1;

        __u8 nlayers            : 2;

        __u8 track_density      : 4;

        __u8 linear_density     : 4;

        __u8 bca                : 1;

        __u32 start_sector;

        __u32 end_sector;

        __u32 end_sector_l0;

};

#define DVD_LAYERS      4

struct dvd_physical {

        __u8 type;

        __u8 layer_num;

        struct dvd_layer layer[DVD_LAYERS];

};

struct dvd_copyright {

        __u8 type;

        __u8 layer_num;

        __u8 cpst;

        __u8 rmi;

};

struct dvd_disckey {

        __u8 type;

        unsigned agid           : 2;

        __u8 value[2048];

};

struct dvd_bca {

        __u8 type;

        int len;

        __u8 value[188];

};

struct dvd_manufact {

        __u8 type;

        __u8 layer_num;

        int len;

        __u8 value[2048];

};

typedef union {

        __u8 type;

        struct dvd_physical     physical;

        struct dvd_copyright    copyright;

        struct dvd_disckey      disckey;

        struct dvd_bca          bca;

        struct dvd_manufact     manufact;

} dvd_struct;

/*

 * DVD authentication ioctl

 */

/* Authentication states */

#define DVD_LU_SEND_AGID        0

#define DVD_HOST_SEND_CHALLENGE 1

#define DVD_LU_SEND_KEY1        2

#define DVD_LU_SEND_CHALLENGE   3

#define DVD_HOST_SEND_KEY2      4

/* Termination states */

#define DVD_AUTH_ESTABLISHED    5

#define DVD_AUTH_FAILURE        6

/* Other functions */

#define DVD_LU_SEND_TITLE_KEY   7

#define DVD_LU_SEND_ASF         8

#define DVD_INVALIDATE_AGID     9

#define DVD_LU_SEND_RPC_STATE   10

#define DVD_HOST_SEND_RPC_STATE 11

/* State data */

typedef __u8 dvd_key[5];                /* 40-bit value, MSB is first elem. */

typedef __u8 dvd_challenge[10]; /* 80-bit value, MSB is first elem. */

struct dvd_lu_send_agid {

        __u8 type;

        unsigned agid           : 2;

};

struct dvd_host_send_challenge {

        __u8 type;

        unsigned agid           : 2;

        dvd_challenge chal;

};

struct dvd_send_key {

        __u8 type;

        unsigned agid           : 2;

        dvd_key key;

};

struct dvd_lu_send_challenge {

        __u8 type;

        unsigned agid           : 2;

        dvd_challenge chal;

};

#define DVD_CPM_NO_COPYRIGHT    0

#define DVD_CPM_COPYRIGHTED     1

#define DVD_CP_SEC_NONE         0

#define DVD_CP_SEC_EXIST        1

#define DVD_CGMS_UNRESTRICTED   0

#define DVD_CGMS_SINGLE         2

#define DVD_CGMS_RESTRICTED     3

struct dvd_lu_send_title_key {

        __u8 type;

        unsigned agid           : 2;

        dvd_key title_key;

        int lba;

        unsigned cpm            : 1;

        unsigned cp_sec         : 1;

        unsigned cgms           : 2;

};

struct dvd_lu_send_asf {

        __u8 type;

        unsigned agid           : 2;

        unsigned asf            : 1;

};

struct dvd_host_send_rpcstate {

        __u8 type;

        __u8 pdrc;

};

struct dvd_lu_send_rpcstate {

        __u8 type               : 2;

        __u8 vra                : 3;

        __u8 ucca               : 3;

        __u8 region_mask;

        __u8 rpc_scheme;

};

typedef union {

        __u8 type;

        struct dvd_lu_send_agid         lsa;

        struct dvd_host_send_challenge  hsc;

        struct dvd_send_key             lsk;

        struct dvd_lu_send_challenge    lsc;

        struct dvd_send_key             hsk;

        struct dvd_lu_send_title_key    lstk;

        struct dvd_lu_send_asf          lsasf;

        struct dvd_host_send_rpcstate   hrpcs;

        struct dvd_lu_send_rpcstate     lrpcs;

} dvd_authinfo;

struct request_sense {

#if defined(__BIG_ENDIAN_BITFIELD)

        __u8 valid              : 1;

        __u8 error_code         : 7;

#elif defined(__LITTLE_ENDIAN_BITFIELD)

        __u8 error_code         : 7;

        __u8 valid              : 1;

#endif

        __u8 segment_number;

#if defined(__BIG_ENDIAN_BITFIELD)

        __u8 reserved1          : 2;

        __u8 ili                : 1;

        __u8 reserved2          : 1;

        __u8 sense_key          : 4;

#elif defined(__LITTLE_ENDIAN_BITFIELD)

        __u8 sense_key          : 4;

        __u8 reserved2          : 1;

        __u8 ili                : 1;

        __u8 reserved1          : 2;

#endif

        __u8 information[4];

        __u8 add_sense_len;

        __u8 command_info[4];

        __u8 asc;

        __u8 ascq;

        __u8 fruc;

        __u8 sks[3];

        __u8 asb[46];

};

/*

 * feature profile

 */

#define CDF_RWRT        0x0020  /* "Random Writable" */

#define CDF_HWDM        0x0024  /* "Hardware Defect Management" */

#define CDF_MRW         0x0028

/*

 * media status bits

 */

#define CDM_MRW_NOTMRW                  0

#define CDM_MRW_BGFORMAT_INACTIVE       1

#define CDM_MRW_BGFORMAT_ACTIVE         2

#define CDM_MRW_BGFORMAT_COMPLETE       3

/*

 * mrw address spaces

 */

#define MRW_LBA_DMA                     0

#define MRW_LBA_GAA                     1

/*

 * mrw mode pages (first is deprecated) -- probed at init time and

 * cdi->mrw_mode_page is set

 */

#define MRW_MODE_PC_PRE1                0x2c

#define MRW_MODE_PC                     0x03

struct mrw_feature_desc {

        __be16 feature_code;

#if defined(__BIG_ENDIAN_BITFIELD)

        __u8 reserved1          : 2;

        __u8 feature_version    : 4;

        __u8 persistent         : 1;

        __u8 curr               : 1;

#elif defined(__LITTLE_ENDIAN_BITFIELD)

        __u8 curr               : 1;

        __u8 persistent         : 1;

        __u8 feature_version    : 4;

        __u8 reserved1          : 2;

#endif

        __u8 add_len;

#if defined(__BIG_ENDIAN_BITFIELD)

        __u8 reserved2          : 7;

        __u8 write              : 1;

#elif defined(__LITTLE_ENDIAN_BITFIELD)

        __u8 write              : 1;

        __u8 reserved2          : 7;

#endif

        __u8 reserved3;

        __u8 reserved4;

        __u8 reserved5;

};

/* cf. mmc4r02g.pdf 5.3.10 Random Writable Feature (0020h) pg 197 of 635 */

struct rwrt_feature_desc {

        __be16 feature_code;

#if defined(__BIG_ENDIAN_BITFIELD)

        __u8 reserved1          : 2;

        __u8 feature_version    : 4;

        __u8 persistent         : 1;

        __u8 curr               : 1;

#elif defined(__LITTLE_ENDIAN_BITFIELD)

        __u8 curr               : 1;

        __u8 persistent         : 1;

        __u8 feature_version    : 4;

        __u8 reserved1          : 2;

#endif

        __u8 add_len;

        __u32 last_lba;

        __u32 block_size;

        __u16 blocking;

#if defined(__BIG_ENDIAN_BITFIELD)

        __u8 reserved2          : 7;

        __u8 page_present       : 1;

#elif defined(__LITTLE_ENDIAN_BITFIELD)

        __u8 page_present       : 1;

        __u8 reserved2          : 7;

#endif

        __u8 reserved3;

};

typedef struct {