Appendix I. DVB Frontend Header File

/*
 * frontend.h
 *
 * Copyright (C) 2000 Marcus Metzler <marcus@convergence.de>
 *                  Ralph  Metzler <ralph@convergence.de>
 *                  Holger Waechtler <holger@convergence.de>
 *                  Andre Draszik <ad@convergence.de>
 *                  for convergence integrated media GmbH
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2.1
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

#ifndef _DVBFRONTEND_H_
#define _DVBFRONTEND_H_

#include <linux/types.h>

typedef enum fe_type {
        FE_QPSK,
        FE_QAM,
        FE_OFDM,
        FE_ATSC
} fe_type_t;


typedef enum fe_caps {
        FE_IS_STUPID                    = 0,
        FE_CAN_INVERSION_AUTO           = 0x1,
        FE_CAN_FEC_1_2                  = 0x2,
        FE_CAN_FEC_2_3                  = 0x4,
        FE_CAN_FEC_3_4                  = 0x8,
        FE_CAN_FEC_4_5                  = 0x10,
        FE_CAN_FEC_5_6                  = 0x20,
        FE_CAN_FEC_6_7                  = 0x40,
        FE_CAN_FEC_7_8                  = 0x80,
        FE_CAN_FEC_8_9                  = 0x100,
        FE_CAN_FEC_AUTO                 = 0x200,
        FE_CAN_QPSK                     = 0x400,
        FE_CAN_QAM_16                   = 0x800,
        FE_CAN_QAM_32                   = 0x1000,
        FE_CAN_QAM_64                   = 0x2000,
        FE_CAN_QAM_128                  = 0x4000,
        FE_CAN_QAM_256                  = 0x8000,
        FE_CAN_QAM_AUTO                 = 0x10000,
        FE_CAN_TRANSMISSION_MODE_AUTO   = 0x20000,
        FE_CAN_BANDWIDTH_AUTO           = 0x40000,
        FE_CAN_GUARD_INTERVAL_AUTO      = 0x80000,
        FE_CAN_HIERARCHY_AUTO           = 0x100000,
        FE_CAN_8VSB                     = 0x200000,
        FE_CAN_16VSB                    = 0x400000,
        FE_HAS_EXTENDED_CAPS            = 0x800000,   /* We need more bitspace for newer APIs, indicate this. */
        FE_CAN_MULTISTREAM              = 0x4000000,  /* frontend supports multistream filtering */
        FE_CAN_TURBO_FEC                = 0x8000000,  /* frontend supports "turbo fec modulation" */
        FE_CAN_2G_MODULATION            = 0x10000000, /* frontend supports "2nd generation modulation" (DVB-S2) */
        FE_NEEDS_BENDING                = 0x20000000, /* not supported anymore, don't use (frontend requires frequency bending) */
        FE_CAN_RECOVER                  = 0x40000000, /* frontend can recover from a cable unplug automatically */
        FE_CAN_MUTE_TS                  = 0x80000000  /* frontend can stop spurious TS data output */
} fe_caps_t;


struct dvb_frontend_info {
        char       name[128];
        fe_type_t  type;                        /* DEPRECATED. Use DTV_ENUM_DELSYS instead */
        __u32      frequency_min;
        __u32      frequency_max;
        __u32      frequency_stepsize;
        __u32      frequency_tolerance;
        __u32      symbol_rate_min;
        __u32      symbol_rate_max;
        __u32      symbol_rate_tolerance;       /* ppm */
        __u32      notifier_delay;              /* DEPRECATED */
        fe_caps_t  caps;
};


/**
 *  Check out the DiSEqC bus spec available on http://www.eutelsat.org/ for
 *  the meaning of this struct...
 */
struct dvb_diseqc_master_cmd {
        __u8 msg [6];   /*  { framing, address, command, data [3] } */
        __u8 msg_len;   /*  valid values are 3...6  */
};


struct dvb_diseqc_slave_reply {
        __u8 msg [4];   /*  { framing, data [3] } */
        __u8 msg_len;   /*  valid values are 0...4, 0 means no msg  */
        int  timeout;   /*  return from ioctl after timeout ms with */
};                      /*  errorcode when no message was received  */


typedef enum fe_sec_voltage {
        SEC_VOLTAGE_13,
        SEC_VOLTAGE_18,
        SEC_VOLTAGE_OFF
} fe_sec_voltage_t;


typedef enum fe_sec_tone_mode {
        SEC_TONE_ON,
        SEC_TONE_OFF
} fe_sec_tone_mode_t;


typedef enum fe_sec_mini_cmd {
        SEC_MINI_A,
        SEC_MINI_B
} fe_sec_mini_cmd_t;


/**
 * enum fe_status - enumerates the possible frontend status
 * @FE_HAS_SIGNAL:      found something above the noise level
 * @FE_HAS_CARRIER:     found a DVB signal
 * @FE_HAS_VITERBI:     FEC is stable
 * @FE_HAS_SYNC:        found sync bytes
 * @FE_HAS_LOCK:        everything's working
 * @FE_TIMEDOUT:        no lock within the last ~2 seconds
 * @FE_REINIT:          frontend was reinitialized, application is recommended
 *                      to reset DiSEqC, tone and parameters
 */

typedef enum fe_status {
        FE_HAS_SIGNAL           = 0x01,
        FE_HAS_CARRIER          = 0x02,
        FE_HAS_VITERBI          = 0x04,
        FE_HAS_SYNC             = 0x08,
        FE_HAS_LOCK             = 0x10,
        FE_TIMEDOUT             = 0x20,
        FE_REINIT               = 0x40,
} fe_status_t;

typedef enum fe_spectral_inversion {
        INVERSION_OFF,
        INVERSION_ON,
        INVERSION_AUTO
} fe_spectral_inversion_t;


typedef enum fe_code_rate {
        FEC_NONE = 0,
        FEC_1_2,
        FEC_2_3,
        FEC_3_4,
        FEC_4_5,
        FEC_5_6,
        FEC_6_7,
        FEC_7_8,
        FEC_8_9,
        FEC_AUTO,
        FEC_3_5,
        FEC_9_10,
        FEC_2_5,
} fe_code_rate_t;


typedef enum fe_modulation {
        QPSK,
        QAM_16,
        QAM_32,
        QAM_64,
        QAM_128,
        QAM_256,
        QAM_AUTO,
        VSB_8,
        VSB_16,
        PSK_8,
        APSK_16,
        APSK_32,
        DQPSK,
        QAM_4_NR,
} fe_modulation_t;

typedef enum fe_transmit_mode {
        TRANSMISSION_MODE_2K,
        TRANSMISSION_MODE_8K,
        TRANSMISSION_MODE_AUTO,
        TRANSMISSION_MODE_4K,
        TRANSMISSION_MODE_1K,
        TRANSMISSION_MODE_16K,
        TRANSMISSION_MODE_32K,
        TRANSMISSION_MODE_C1,
        TRANSMISSION_MODE_C3780,
} fe_transmit_mode_t;

#if defined(__DVB_CORE__) || !defined (__KERNEL__)
typedef enum fe_bandwidth {
        BANDWIDTH_8_MHZ,
        BANDWIDTH_7_MHZ,
        BANDWIDTH_6_MHZ,
        BANDWIDTH_AUTO,
        BANDWIDTH_5_MHZ,
        BANDWIDTH_10_MHZ,
        BANDWIDTH_1_712_MHZ,
} fe_bandwidth_t;
#endif

typedef enum fe_guard_interval {
        GUARD_INTERVAL_1_32,
        GUARD_INTERVAL_1_16,
        GUARD_INTERVAL_1_8,
        GUARD_INTERVAL_1_4,
        GUARD_INTERVAL_AUTO,
        GUARD_INTERVAL_1_128,
        GUARD_INTERVAL_19_128,
        GUARD_INTERVAL_19_256,
        GUARD_INTERVAL_PN420,
        GUARD_INTERVAL_PN595,
        GUARD_INTERVAL_PN945,
} fe_guard_interval_t;


typedef enum fe_hierarchy {
        HIERARCHY_NONE,
        HIERARCHY_1,
        HIERARCHY_2,
        HIERARCHY_4,
        HIERARCHY_AUTO
} fe_hierarchy_t;

enum fe_interleaving {
        INTERLEAVING_NONE,
        INTERLEAVING_AUTO,
        INTERLEAVING_240,
        INTERLEAVING_720,
};

#if defined(__DVB_CORE__) || !defined (__KERNEL__)
struct dvb_qpsk_parameters {
        __u32           symbol_rate;  /* symbol rate in Symbols per second */
        fe_code_rate_t  fec_inner;    /* forward error correction (see above) */
};

struct dvb_qam_parameters {
        __u32           symbol_rate; /* symbol rate in Symbols per second */
        fe_code_rate_t  fec_inner;   /* forward error correction (see above) */
        fe_modulation_t modulation;  /* modulation type (see above) */
};

struct dvb_vsb_parameters {
        fe_modulation_t modulation;  /* modulation type (see above) */
};

struct dvb_ofdm_parameters {
        fe_bandwidth_t      bandwidth;
        fe_code_rate_t      code_rate_HP;  /* high priority stream code rate */
        fe_code_rate_t      code_rate_LP;  /* low priority stream code rate */
        fe_modulation_t     constellation; /* modulation type (see above) */
        fe_transmit_mode_t  transmission_mode;
        fe_guard_interval_t guard_interval;
        fe_hierarchy_t      hierarchy_information;
};


struct dvb_frontend_parameters {
        __u32 frequency;     /* (absolute) frequency in Hz for QAM/OFDM/ATSC */
                             /* intermediate frequency in kHz for QPSK */
        fe_spectral_inversion_t inversion;
        union {
                struct dvb_qpsk_parameters qpsk;
                struct dvb_qam_parameters  qam;
                struct dvb_ofdm_parameters ofdm;
                struct dvb_vsb_parameters vsb;
        } u;
};

struct dvb_frontend_event {
        fe_status_t status;
        struct dvb_frontend_parameters parameters;
};
#endif

/* S2API Commands */
#define DTV_UNDEFINED           0
#define DTV_TUNE                1
#define DTV_CLEAR               2
#define DTV_FREQUENCY           3
#define DTV_MODULATION          4
#define DTV_BANDWIDTH_HZ        5
#define DTV_INVERSION           6
#define DTV_DISEQC_MASTER       7
#define DTV_SYMBOL_RATE         8
#define DTV_INNER_FEC           9
#define DTV_VOLTAGE             10
#define DTV_TONE                11
#define DTV_PILOT               12
#define DTV_ROLLOFF             13
#define DTV_DISEQC_SLAVE_REPLY  14

/* Basic enumeration set for querying unlimited capabilities */
#define DTV_FE_CAPABILITY_COUNT 15
#define DTV_FE_CAPABILITY       16
#define DTV_DELIVERY_SYSTEM     17

/* ISDB-T and ISDB-Tsb */
#define DTV_ISDBT_PARTIAL_RECEPTION     18
#define DTV_ISDBT_SOUND_BROADCASTING    19

#define DTV_ISDBT_SB_SUBCHANNEL_ID      20
#define DTV_ISDBT_SB_SEGMENT_IDX        21
#define DTV_ISDBT_SB_SEGMENT_COUNT      22

#define DTV_ISDBT_LAYERA_FEC                    23
#define DTV_ISDBT_LAYERA_MODULATION             24
#define DTV_ISDBT_LAYERA_SEGMENT_COUNT          25
#define DTV_ISDBT_LAYERA_TIME_INTERLEAVING      26

#define DTV_ISDBT_LAYERB_FEC                    27
#define DTV_ISDBT_LAYERB_MODULATION             28
#define DTV_ISDBT_LAYERB_SEGMENT_COUNT          29
#define DTV_ISDBT_LAYERB_TIME_INTERLEAVING      30

#define DTV_ISDBT_LAYERC_FEC                    31
#define DTV_ISDBT_LAYERC_MODULATION             32
#define DTV_ISDBT_LAYERC_SEGMENT_COUNT          33
#define DTV_ISDBT_LAYERC_TIME_INTERLEAVING      34

#define DTV_API_VERSION         35

#define DTV_CODE_RATE_HP        36
#define DTV_CODE_RATE_LP        37
#define DTV_GUARD_INTERVAL      38
#define DTV_TRANSMISSION_MODE   39
#define DTV_HIERARCHY           40

#define DTV_ISDBT_LAYER_ENABLED 41

#define DTV_STREAM_ID           42
#define DTV_ISDBS_TS_ID_LEGACY  DTV_STREAM_ID
#define DTV_DVBT2_PLP_ID_LEGACY 43

#define DTV_ENUM_DELSYS         44

/* ATSC-MH */
#define DTV_ATSCMH_FIC_VER              45
#define DTV_ATSCMH_PARADE_ID            46
#define DTV_ATSCMH_NOG                  47
#define DTV_ATSCMH_TNOG                 48
#define DTV_ATSCMH_SGN                  49
#define DTV_ATSCMH_PRC                  50
#define DTV_ATSCMH_RS_FRAME_MODE        51
#define DTV_ATSCMH_RS_FRAME_ENSEMBLE    52
#define DTV_ATSCMH_RS_CODE_MODE_PRI     53
#define DTV_ATSCMH_RS_CODE_MODE_SEC     54
#define DTV_ATSCMH_SCCC_BLOCK_MODE      55
#define DTV_ATSCMH_SCCC_CODE_MODE_A     56
#define DTV_ATSCMH_SCCC_CODE_MODE_B     57
#define DTV_ATSCMH_SCCC_CODE_MODE_C     58
#define DTV_ATSCMH_SCCC_CODE_MODE_D     59

#define DTV_INTERLEAVING                        60
#define DTV_LNA                                 61

/* Quality parameters */
#define DTV_STAT_SIGNAL_STRENGTH        62
#define DTV_STAT_CNR                    63
#define DTV_STAT_PRE_ERROR_BIT_COUNT    64
#define DTV_STAT_PRE_TOTAL_BIT_COUNT    65
#define DTV_STAT_POST_ERROR_BIT_COUNT   66
#define DTV_STAT_POST_TOTAL_BIT_COUNT   67
#define DTV_STAT_ERROR_BLOCK_COUNT      68
#define DTV_STAT_TOTAL_BLOCK_COUNT      69

#define DTV_MAX_COMMAND         DTV_STAT_TOTAL_BLOCK_COUNT

typedef enum fe_pilot {
        PILOT_ON,
        PILOT_OFF,
        PILOT_AUTO,
} fe_pilot_t;

typedef enum fe_rolloff {
        ROLLOFF_35, /* Implied value in DVB-S, default for DVB-S2 */
        ROLLOFF_20,
        ROLLOFF_25,
        ROLLOFF_AUTO,
} fe_rolloff_t;

typedef enum fe_delivery_system {
        SYS_UNDEFINED,
        SYS_DVBC_ANNEX_A,
        SYS_DVBC_ANNEX_B,
        SYS_DVBT,
        SYS_DSS,
        SYS_DVBS,
        SYS_DVBS2,
        SYS_DVBH,
        SYS_ISDBT,
        SYS_ISDBS,
        SYS_ISDBC,
        SYS_ATSC,
        SYS_ATSCMH,
        SYS_DTMB,
        SYS_CMMB,
        SYS_DAB,
        SYS_DVBT2,
        SYS_TURBO,
        SYS_DVBC_ANNEX_C,
} fe_delivery_system_t;

/* backward compatibility */
#define SYS_DVBC_ANNEX_AC       SYS_DVBC_ANNEX_A
#define SYS_DMBTH SYS_DTMB /* DMB-TH is legacy name, use DTMB instead */

/* ATSC-MH */

enum atscmh_sccc_block_mode {
        ATSCMH_SCCC_BLK_SEP      = 0,
        ATSCMH_SCCC_BLK_COMB     = 1,
        ATSCMH_SCCC_BLK_RES      = 2,
};

enum atscmh_sccc_code_mode {
        ATSCMH_SCCC_CODE_HLF     = 0,
        ATSCMH_SCCC_CODE_QTR     = 1,
        ATSCMH_SCCC_CODE_RES     = 2,
};

enum atscmh_rs_frame_ensemble {
        ATSCMH_RSFRAME_ENS_PRI   = 0,
        ATSCMH_RSFRAME_ENS_SEC   = 1,
};

enum atscmh_rs_frame_mode {
        ATSCMH_RSFRAME_PRI_ONLY  = 0,
        ATSCMH_RSFRAME_PRI_SEC   = 1,
        ATSCMH_RSFRAME_RES       = 2,
};

enum atscmh_rs_code_mode {
        ATSCMH_RSCODE_211_187    = 0,
        ATSCMH_RSCODE_223_187    = 1,
        ATSCMH_RSCODE_235_187    = 2,
        ATSCMH_RSCODE_RES        = 3,
};

#define NO_STREAM_ID_FILTER     (~0U)
#define LNA_AUTO                (~0U)

struct dtv_cmds_h {
        char    *name;          /* A display name for debugging purposes */

        __u32   cmd;            /* A unique ID */

        /* Flags */
        __u32   set:1;          /* Either a set or get property */
        __u32   buffer:1;       /* Does this property use the buffer? */
        __u32   reserved:30;    /* Align */
};

/**
 * Scale types for the quality parameters.
 * @FE_SCALE_NOT_AVAILABLE: That QoS measure is not available. That
 *                          could indicate a temporary or a permanent
 *                          condition.
 * @FE_SCALE_DECIBEL: The scale is measured in 0.001 dB steps, typically
 *                used on signal measures.
 * @FE_SCALE_RELATIVE: The scale is a relative percentual measure,
 *                      ranging from 0 (0%) to 0xffff (100%).
 * @FE_SCALE_COUNTER: The scale counts the occurrence of an event, like
 *                      bit error, block error, lapsed time.
 */
enum fecap_scale_params {
        FE_SCALE_NOT_AVAILABLE = 0,
        FE_SCALE_DECIBEL,
        FE_SCALE_RELATIVE,
        FE_SCALE_COUNTER
};

/**
 * struct dtv_stats - Used for reading a DTV status property
 *
 * @value:      value of the measure. Should range from 0 to 0xffff;
 * @scale:      Filled with enum fecap_scale_params - the scale
 *              in usage for that parameter
 *
 * For most delivery systems, this will return a single value for each
 * parameter.
 * It should be noticed, however, that new OFDM delivery systems like
 * ISDB can use different modulation types for each group of carriers.
 * On such standards, up to 8 groups of statistics can be provided, one
 * for each carrier group (called "layer" on ISDB).
 * In order to be consistent with other delivery systems, the first
 * value refers to the entire set of carriers ("global").
 * dtv_status:scale should use the value FE_SCALE_NOT_AVAILABLE when
 * the value for the entire group of carriers or from one specific layer
 * is not provided by the hardware.
 * st.len should be filled with the latest filled status + 1.
 *
 * In other words, for ISDB, those values should be filled like:
 *      u.st.stat.svalue[0] = global statistics;
 *      u.st.stat.scale[0] = FE_SCALE_DECIBELS;
 *      u.st.stat.value[1] = layer A statistics;
 *      u.st.stat.scale[1] = FE_SCALE_NOT_AVAILABLE (if not available);
 *      u.st.stat.svalue[2] = layer B statistics;
 *      u.st.stat.scale[2] = FE_SCALE_DECIBELS;
 *      u.st.stat.svalue[3] = layer C statistics;
 *      u.st.stat.scale[3] = FE_SCALE_DECIBELS;
 *      u.st.len = 4;
 */
struct dtv_stats {
        __u8 scale;     /* enum fecap_scale_params type */
        union {
                __u64 uvalue;   /* for counters and relative scales */
                __s64 svalue;   /* for 0.001 dB measures */
        };
} __attribute__ ((packed));


#define MAX_DTV_STATS   4

struct dtv_fe_stats {
        __u8 len;
        struct dtv_stats stat[MAX_DTV_STATS];
} __attribute__ ((packed));

struct dtv_property {
        __u32 cmd;
        __u32 reserved[3];
        union {
                __u32 data;
                struct dtv_fe_stats st;
                struct {
                        __u8 data[32];
                        __u32 len;
                        __u32 reserved1[3];
                        void *reserved2;
                } buffer;
        } u;
        int result;
} __attribute__ ((packed));

/* num of properties cannot exceed DTV_IOCTL_MAX_MSGS per ioctl */
#define DTV_IOCTL_MAX_MSGS 64

struct dtv_properties {
        __u32 num;
        struct dtv_property *props;
};

#define FE_SET_PROPERTY            _IOW('o', 82, struct dtv_properties)
#define FE_GET_PROPERTY            _IOR('o', 83, struct dtv_properties)


/**
 * When set, this flag will disable any zigzagging or other "normal" tuning
 * behaviour. Additionally, there will be no automatic monitoring of the lock
 * status, and hence no frontend events will be generated. If a frontend device
 * is closed, this flag will be automatically turned off when the device is
 * reopened read-write.
 */
#define FE_TUNE_MODE_ONESHOT 0x01


#define FE_GET_INFO                _IOR('o', 61, struct dvb_frontend_info)

#define FE_DISEQC_RESET_OVERLOAD   _IO('o', 62)
#define FE_DISEQC_SEND_MASTER_CMD  _IOW('o', 63, struct dvb_diseqc_master_cmd)
#define FE_DISEQC_RECV_SLAVE_REPLY _IOR('o', 64, struct dvb_diseqc_slave_reply)
#define FE_DISEQC_SEND_BURST       _IO('o', 65)  /* fe_sec_mini_cmd_t */

#define FE_SET_TONE                _IO('o', 66)  /* fe_sec_tone_mode_t */
#define FE_SET_VOLTAGE             _IO('o', 67)  /* fe_sec_voltage_t */
#define FE_ENABLE_HIGH_LNB_VOLTAGE _IO('o', 68)  /* int */

#define FE_READ_STATUS             _IOR('o', 69, fe_status_t)
#define FE_READ_BER                _IOR('o', 70, __u32)
#define FE_READ_SIGNAL_STRENGTH    _IOR('o', 71, __u16)
#define FE_READ_SNR                _IOR('o', 72, __u16)
#define FE_READ_UNCORRECTED_BLOCKS _IOR('o', 73, __u32)

#define FE_SET_FRONTEND            _IOW('o', 76, struct dvb_frontend_parameters)
#define FE_GET_FRONTEND            _IOR('o', 77, struct dvb_frontend_parameters)
#define FE_SET_FRONTEND_TUNE_MODE  _IO('o', 81) /* unsigned int */
#define FE_GET_EVENT               _IOR('o', 78, struct dvb_frontend_event)

#define FE_DISHNETWORK_SEND_LEGACY_CMD _IO('o', 80) /* unsigned int */

#endif /*_DVBFRONTEND_H_*/