Viewing file:  dvb_frontend.h (30.03 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/*
* dvb_frontend.h
*
* The Digital TV Frontend kABI defines a driver-internal interface for
* registering low-level, hardware specific driver to a hardware independent
* frontend layer.
*
* Copyright (C) 2001 convergence integrated media GmbH
* Copyright (C) 2004 convergence GmbH
*
* Written by Ralph Metzler
* Overhauled by Holger Waechtler
* Kernel I2C stuff by Michael Hunold <[email protected]>
*
* 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 _DVB_FRONTEND_H_
#define _DVB_FRONTEND_H_
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/ioctl.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/bitops.h>
#include <linux/dvb/frontend.h>
#include <media/dvbdev.h>
/*
* Maximum number of Delivery systems per frontend. It
* should be smaller or equal to 32
*/
#define MAX_DELSYS 8
/* Helper definitions to be used at frontend drivers */
#define kHz 1000UL
#define MHz 1000000UL
/**
* struct dvb_frontend_tune_settings - parameters to adjust frontend tuning
*
* @min_delay_ms: minimum delay for tuning, in ms
* @step_size: step size between two consecutive frequencies
* @max_drift: maximum drift
*
* NOTE: step_size is in Hz, for terrestrial/cable or kHz for satellite
*/
struct dvb_frontend_tune_settings {
int min_delay_ms;
int step_size;
int max_drift;
};
struct dvb_frontend;
/**
* struct dvb_tuner_info - Frontend name and min/max ranges/bandwidths
*
* @name: name of the Frontend
* @frequency_min_hz: minimal frequency supported in Hz
* @frequency_max_hz: maximum frequency supported in Hz
* @frequency_step_hz: frequency step in Hz
* @bandwidth_min: minimal frontend bandwidth supported
* @bandwidth_max: maximum frontend bandwidth supported
* @bandwidth_step: frontend bandwidth step
*/
struct dvb_tuner_info {
char name[128];
u32 frequency_min_hz;
u32 frequency_max_hz;
u32 frequency_step_hz;
u32 bandwidth_min;
u32 bandwidth_max;
u32 bandwidth_step;
};
/**
* struct analog_parameters - Parameters to tune into an analog/radio channel
*
* @frequency: Frequency used by analog TV tuner (either in 62.5 kHz step,
* for TV, or 62.5 Hz for radio)
* @mode: Tuner mode, as defined on enum v4l2_tuner_type
* @audmode: Audio mode as defined for the rxsubchans field at videodev2.h,
* e. g. V4L2_TUNER_MODE_*
* @std: TV standard bitmap as defined at videodev2.h, e. g. V4L2_STD_*
*
* Hybrid tuners should be supported by both V4L2 and DVB APIs. This
* struct contains the data that are used by the V4L2 side. To avoid
* dependencies from V4L2 headers, all enums here are declared as integers.
*/
struct analog_parameters {
unsigned int frequency;
unsigned int mode;
unsigned int audmode;
u64 std;
};
/**
* enum dvbfe_algo - defines the algorithm used to tune into a channel
*
* @DVBFE_ALGO_HW: Hardware Algorithm -
* Devices that support this algorithm do everything in hardware
* and no software support is needed to handle them.
* Requesting these devices to LOCK is the only thing required,
* device is supposed to do everything in the hardware.
*
* @DVBFE_ALGO_SW: Software Algorithm -
* These are dumb devices, that require software to do everything
*
* @DVBFE_ALGO_CUSTOM: Customizable Agorithm -
* Devices having this algorithm can be customized to have specific
* algorithms in the frontend driver, rather than simply doing a
* software zig-zag. In this case the zigzag maybe hardware assisted
* or it maybe completely done in hardware. In all cases, usage of
* this algorithm, in conjunction with the search and track
* callbacks, utilizes the driver specific algorithm.
*
* @DVBFE_ALGO_RECOVERY: Recovery Algorithm -
* These devices have AUTO recovery capabilities from LOCK failure
*/
enum dvbfe_algo {
DVBFE_ALGO_HW = BIT(0),
DVBFE_ALGO_SW = BIT(1),
DVBFE_ALGO_CUSTOM = BIT(2),
DVBFE_ALGO_RECOVERY = BIT(31),
};
/**
* enum dvbfe_search - search callback possible return status
*
* @DVBFE_ALGO_SEARCH_SUCCESS:
* The frontend search algorithm completed and returned successfully
*
* @DVBFE_ALGO_SEARCH_ASLEEP:
* The frontend search algorithm is sleeping
*
* @DVBFE_ALGO_SEARCH_FAILED:
* The frontend search for a signal failed
*
* @DVBFE_ALGO_SEARCH_INVALID:
* The frontend search algorithm was probably supplied with invalid
* parameters and the search is an invalid one
*
* @DVBFE_ALGO_SEARCH_ERROR:
* The frontend search algorithm failed due to some error
*
* @DVBFE_ALGO_SEARCH_AGAIN:
* The frontend search algorithm was requested to search again
*/
enum dvbfe_search {
DVBFE_ALGO_SEARCH_SUCCESS = BIT(0),
DVBFE_ALGO_SEARCH_ASLEEP = BIT(1),
DVBFE_ALGO_SEARCH_FAILED = BIT(2),
DVBFE_ALGO_SEARCH_INVALID = BIT(3),
DVBFE_ALGO_SEARCH_AGAIN = BIT(4),
DVBFE_ALGO_SEARCH_ERROR = BIT(31),
};
/**
* struct dvb_tuner_ops - Tuner information and callbacks
*
* @info: embedded &struct dvb_tuner_info with tuner properties
* @release: callback function called when frontend is detached.
* drivers should free any allocated memory.
* @init: callback function used to initialize the tuner device.
* @sleep: callback function used to put the tuner to sleep.
* @suspend: callback function used to inform that the Kernel will
* suspend.
* @resume: callback function used to inform that the Kernel is
* resuming from suspend.
* @set_params: callback function used to inform the tuner to tune
* into a digital TV channel. The properties to be used
* are stored at &struct dvb_frontend.dtv_property_cache.
* The tuner demod can change the parameters to reflect
* the changes needed for the channel to be tuned, and
* update statistics. This is the recommended way to set
* the tuner parameters and should be used on newer
* drivers.
* @set_analog_params: callback function used to tune into an analog TV
* channel on hybrid tuners. It passes @analog_parameters
* to the driver.
* @set_config: callback function used to send some tuner-specific
* parameters.
* @get_frequency: get the actual tuned frequency
* @get_bandwidth: get the bandwidth used by the low pass filters
* @get_if_frequency: get the Intermediate Frequency, in Hz. For baseband,
* should return 0.
* @get_status: returns the frontend lock status
* @get_rf_strength: returns the RF signal strength. Used mostly to support
* analog TV and radio. Digital TV should report, instead,
* via DVBv5 API (&struct dvb_frontend.dtv_property_cache).
* @get_afc: Used only by analog TV core. Reports the frequency
* drift due to AFC.
* @calc_regs: callback function used to pass register data settings
* for simple tuners. Shouldn't be used on newer drivers.
* @set_frequency: Set a new frequency. Shouldn't be used on newer drivers.
* @set_bandwidth: Set a new frequency. Shouldn't be used on newer drivers.
*
* NOTE: frequencies used on @get_frequency and @set_frequency are in Hz for
* terrestrial/cable or kHz for satellite.
*
*/
struct dvb_tuner_ops {
struct dvb_tuner_info info;
void (*release)(struct dvb_frontend *fe);
int (*init)(struct dvb_frontend *fe);
int (*sleep)(struct dvb_frontend *fe);
int (*suspend)(struct dvb_frontend *fe);
int (*resume)(struct dvb_frontend *fe);
/* This is the recommended way to set the tuner */
int (*set_params)(struct dvb_frontend *fe);
int (*set_analog_params)(struct dvb_frontend *fe, struct analog_parameters *p);
int (*set_config)(struct dvb_frontend *fe, void *priv_cfg);
int (*get_frequency)(struct dvb_frontend *fe, u32 *frequency);
int (*get_bandwidth)(struct dvb_frontend *fe, u32 *bandwidth);
int (*get_if_frequency)(struct dvb_frontend *fe, u32 *frequency);
#define TUNER_STATUS_LOCKED 1
#define TUNER_STATUS_STEREO 2
int (*get_status)(struct dvb_frontend *fe, u32 *status);
int (*get_rf_strength)(struct dvb_frontend *fe, u16 *strength);
int (*get_afc)(struct dvb_frontend *fe, s32 *afc);
/*
* This is support for demods like the mt352 - fills out the supplied
* buffer with what to write.
*
* Don't use on newer drivers.
*/
int (*calc_regs)(struct dvb_frontend *fe, u8 *buf, int buf_len);
/*
* These are provided separately from set_params in order to
* facilitate silicon tuners which require sophisticated tuning loops,
* controlling each parameter separately.
*
* Don't use on newer drivers.
*/
int (*set_frequency)(struct dvb_frontend *fe, u32 frequency);
int (*set_bandwidth)(struct dvb_frontend *fe, u32 bandwidth);
};
/**
* struct analog_demod_info - Information struct for analog TV part of the demod
*
* @name: Name of the analog TV demodulator
*/
struct analog_demod_info {
char *name;
};
/**
* struct analog_demod_ops - Demodulation information and callbacks for
* analog TV and radio
*
* @info: pointer to struct analog_demod_info
* @set_params: callback function used to inform the demod to set the
* demodulator parameters needed to decode an analog or
* radio channel. The properties are passed via
* &struct analog_params.
* @has_signal: returns 0xffff if has signal, or 0 if it doesn't.
* @get_afc: Used only by analog TV core. Reports the frequency
* drift due to AFC.
* @tuner_status: callback function that returns tuner status bits, e. g.
* %TUNER_STATUS_LOCKED and %TUNER_STATUS_STEREO.
* @standby: set the tuner to standby mode.
* @release: callback function called when frontend is detached.
* drivers should free any allocated memory.
* @i2c_gate_ctrl: controls the I2C gate. Newer drivers should use I2C
* mux support instead.
* @set_config: callback function used to send some tuner-specific
* parameters.
*/
struct analog_demod_ops {
struct analog_demod_info info;
void (*set_params)(struct dvb_frontend *fe,
struct analog_parameters *params);
int (*has_signal)(struct dvb_frontend *fe, u16 *signal);
int (*get_afc)(struct dvb_frontend *fe, s32 *afc);
void (*tuner_status)(struct dvb_frontend *fe);
void (*standby)(struct dvb_frontend *fe);
void (*release)(struct dvb_frontend *fe);
int (*i2c_gate_ctrl)(struct dvb_frontend *fe, int enable);
/** This is to allow setting tuner-specific configuration */
int (*set_config)(struct dvb_frontend *fe, void *priv_cfg);
};
struct dtv_frontend_properties;
/**
* struct dvb_frontend_internal_info - Frontend properties and capabilities
*
* @name: Name of the frontend
* @frequency_min_hz: Minimal frequency supported by the frontend.
* @frequency_max_hz: Minimal frequency supported by the frontend.
* @frequency_stepsize_hz: All frequencies are multiple of this value.
* @frequency_tolerance_hz: Frequency tolerance.
* @symbol_rate_min: Minimal symbol rate, in bauds
* (for Cable/Satellite systems).
* @symbol_rate_max: Maximal symbol rate, in bauds
* (for Cable/Satellite systems).
* @symbol_rate_tolerance: Maximal symbol rate tolerance, in ppm
* (for Cable/Satellite systems).
* @caps: Capabilities supported by the frontend,
* as specified in &enum fe_caps.
*/
struct dvb_frontend_internal_info {
char name[128];
u32 frequency_min_hz;
u32 frequency_max_hz;
u32 frequency_stepsize_hz;
u32 frequency_tolerance_hz;
u32 symbol_rate_min;
u32 symbol_rate_max;
u32 symbol_rate_tolerance;
enum fe_caps caps;
};
/**
* struct dvb_frontend_ops - Demodulation information and callbacks for
* ditialt TV
*
* @info: embedded &struct dvb_tuner_info with tuner properties
* @delsys: Delivery systems supported by the frontend
* @detach: callback function called when frontend is detached.
* drivers should clean up, but not yet free the &struct
* dvb_frontend allocation.
* @release: callback function called when frontend is ready to be
* freed.
* drivers should free any allocated memory.
* @release_sec: callback function requesting that the Satellite Equipment
* Control (SEC) driver to release and free any memory
* allocated by the driver.
* @init: callback function used to initialize the tuner device.
* @sleep: callback function used to put the tuner to sleep.
* @write: callback function used by some demod legacy drivers to
* allow other drivers to write data into their registers.
* Should not be used on new drivers.
* @tune: callback function used by demod drivers that use
* @DVBFE_ALGO_HW to tune into a frequency.
* @get_frontend_algo: returns the desired hardware algorithm.
* @set_frontend: callback function used to inform the demod to set the
* parameters for demodulating a digital TV channel.
* The properties to be used are stored at &struct
* dvb_frontend.dtv_property_cache. The demod can change
* the parameters to reflect the changes needed for the
* channel to be decoded, and update statistics.
* @get_tune_settings: callback function
* @get_frontend: callback function used to inform the parameters
* actuall in use. The properties to be used are stored at
* &struct dvb_frontend.dtv_property_cache and update
* statistics. Please notice that it should not return
* an error code if the statistics are not available
* because the demog is not locked.
* @read_status: returns the locking status of the frontend.
* @read_ber: legacy callback function to return the bit error rate.
* Newer drivers should provide such info via DVBv5 API,
* e. g. @set_frontend;/@get_frontend, implementing this
* callback only if DVBv3 API compatibility is wanted.
* @read_signal_strength: legacy callback function to return the signal
* strength. Newer drivers should provide such info via
* DVBv5 API, e. g. @set_frontend/@get_frontend,
* implementing this callback only if DVBv3 API
* compatibility is wanted.
* @read_snr: legacy callback function to return the Signal/Noise
* rate. Newer drivers should provide such info via
* DVBv5 API, e. g. @set_frontend/@get_frontend,
* implementing this callback only if DVBv3 API
* compatibility is wanted.
* @read_ucblocks: legacy callback function to return the Uncorrected Error
* Blocks. Newer drivers should provide such info via
* DVBv5 API, e. g. @set_frontend/@get_frontend,
* implementing this callback only if DVBv3 API
* compatibility is wanted.
* @diseqc_reset_overload: callback function to implement the
* FE_DISEQC_RESET_OVERLOAD() ioctl (only Satellite)
* @diseqc_send_master_cmd: callback function to implement the
* FE_DISEQC_SEND_MASTER_CMD() ioctl (only Satellite).
* @diseqc_recv_slave_reply: callback function to implement the
* FE_DISEQC_RECV_SLAVE_REPLY() ioctl (only Satellite)
* @diseqc_send_burst: callback function to implement the
* FE_DISEQC_SEND_BURST() ioctl (only Satellite).
* @set_tone: callback function to implement the
* FE_SET_TONE() ioctl (only Satellite).
* @set_voltage: callback function to implement the
* FE_SET_VOLTAGE() ioctl (only Satellite).
* @enable_high_lnb_voltage: callback function to implement the
* FE_ENABLE_HIGH_LNB_VOLTAGE() ioctl (only Satellite).
* @dishnetwork_send_legacy_command: callback function to implement the
* FE_DISHNETWORK_SEND_LEGACY_CMD() ioctl (only Satellite).
* Drivers should not use this, except when the DVB
* core emulation fails to provide proper support (e.g.
* if @set_voltage takes more than 8ms to work), and
* when backward compatibility with this legacy API is
* required.
* @i2c_gate_ctrl: controls the I2C gate. Newer drivers should use I2C
* mux support instead.
* @ts_bus_ctrl: callback function used to take control of the TS bus.
* @set_lna: callback function to power on/off/auto the LNA.
* @search: callback function used on some custom algo search algos.
* @tuner_ops: pointer to &struct dvb_tuner_ops
* @analog_ops: pointer to &struct analog_demod_ops
*/
struct dvb_frontend_ops {
struct dvb_frontend_internal_info info;
u8 delsys[MAX_DELSYS];
void (*detach)(struct dvb_frontend *fe);
void (*release)(struct dvb_frontend* fe);
void (*release_sec)(struct dvb_frontend* fe);
int (*init)(struct dvb_frontend* fe);
int (*sleep)(struct dvb_frontend* fe);
int (*write)(struct dvb_frontend* fe, const u8 buf[], int len);
/* if this is set, it overrides the default swzigzag */
int (*tune)(struct dvb_frontend* fe,
bool re_tune,
unsigned int mode_flags,
unsigned int *delay,
enum fe_status *status);
/* get frontend tuning algorithm from the module */
enum dvbfe_algo (*get_frontend_algo)(struct dvb_frontend *fe);
/* these two are only used for the swzigzag code */
int (*set_frontend)(struct dvb_frontend *fe);
int (*get_tune_settings)(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* settings);
int (*get_frontend)(struct dvb_frontend *fe,
struct dtv_frontend_properties *props);
int (*read_status)(struct dvb_frontend *fe, enum fe_status *status);
int (*read_ber)(struct dvb_frontend* fe, u32* ber);
int (*read_signal_strength)(struct dvb_frontend* fe, u16* strength);
int (*read_snr)(struct dvb_frontend* fe, u16* snr);
int (*read_ucblocks)(struct dvb_frontend* fe, u32* ucblocks);
int (*diseqc_reset_overload)(struct dvb_frontend* fe);
int (*diseqc_send_master_cmd)(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd* cmd);
int (*diseqc_recv_slave_reply)(struct dvb_frontend* fe, struct dvb_diseqc_slave_reply* reply);
int (*diseqc_send_burst)(struct dvb_frontend *fe,
enum fe_sec_mini_cmd minicmd);
int (*set_tone)(struct dvb_frontend *fe, enum fe_sec_tone_mode tone);
int (*set_voltage)(struct dvb_frontend *fe,
enum fe_sec_voltage voltage);
int (*enable_high_lnb_voltage)(struct dvb_frontend* fe, long arg);
int (*dishnetwork_send_legacy_command)(struct dvb_frontend* fe, unsigned long cmd);
int (*i2c_gate_ctrl)(struct dvb_frontend* fe, int enable);
int (*ts_bus_ctrl)(struct dvb_frontend* fe, int acquire);
int (*set_lna)(struct dvb_frontend *);
/*
* These callbacks are for devices that implement their own
* tuning algorithms, rather than a simple swzigzag
*/
enum dvbfe_search (*search)(struct dvb_frontend *fe);
struct dvb_tuner_ops tuner_ops;
struct analog_demod_ops analog_ops;
};
#ifdef __DVB_CORE__
#define MAX_EVENT 8
/* Used only internally at dvb_frontend.c */
struct dvb_fe_events {
struct dvb_frontend_event events[MAX_EVENT];
int eventw;
int eventr;
int overflow;
wait_queue_head_t wait_queue;
struct mutex mtx;
};
#endif
/**
* struct dtv_frontend_properties - contains a list of properties that are
* specific to a digital TV standard.
*
* @frequency: frequency in Hz for terrestrial/cable or in kHz for
* Satellite
* @modulation: Frontend modulation type
* @voltage: SEC voltage (only Satellite)
* @sectone: SEC tone mode (only Satellite)
* @inversion: Spectral inversion
* @fec_inner: Forward error correction inner Code Rate
* @transmission_mode: Transmission Mode
* @bandwidth_hz: Bandwidth, in Hz. A zero value means that userspace
* wants to autodetect.
* @guard_interval: Guard Interval
* @hierarchy: Hierarchy
* @symbol_rate: Symbol Rate
* @code_rate_HP: high priority stream code rate
* @code_rate_LP: low priority stream code rate
* @pilot: Enable/disable/autodetect pilot tones
* @rolloff: Rolloff factor (alpha)
* @delivery_system: FE delivery system (e. g. digital TV standard)
* @interleaving: interleaving
* @isdbt_partial_reception: ISDB-T partial reception (only ISDB standard)
* @isdbt_sb_mode: ISDB-T Sound Broadcast (SB) mode (only ISDB standard)
* @isdbt_sb_subchannel: ISDB-T SB subchannel (only ISDB standard)
* @isdbt_sb_segment_idx: ISDB-T SB segment index (only ISDB standard)
* @isdbt_sb_segment_count: ISDB-T SB segment count (only ISDB standard)
* @isdbt_layer_enabled: ISDB Layer enabled (only ISDB standard)
* @layer: ISDB per-layer data (only ISDB standard)
* @layer.segment_count: Segment Count;
* @layer.fec: per layer code rate;
* @layer.modulation: per layer modulation;
* @layer.interleaving: per layer interleaving.
* @stream_id: If different than zero, enable substream filtering, if
* hardware supports (DVB-S2 and DVB-T2).
* @scrambling_sequence_index: Carries the index of the DVB-S2 physical layer
* scrambling sequence.
* @atscmh_fic_ver: Version number of the FIC (Fast Information Channel)
* signaling data (only ATSC-M/H)
* @atscmh_parade_id: Parade identification number (only ATSC-M/H)
* @atscmh_nog: Number of MH groups per MH subframe for a designated
* parade (only ATSC-M/H)
* @atscmh_tnog: Total number of MH groups including all MH groups
* belonging to all MH parades in one MH subframe
* (only ATSC-M/H)
* @atscmh_sgn: Start group number (only ATSC-M/H)
* @atscmh_prc: Parade repetition cycle (only ATSC-M/H)
* @atscmh_rs_frame_mode: Reed Solomon (RS) frame mode (only ATSC-M/H)
* @atscmh_rs_frame_ensemble: RS frame ensemble (only ATSC-M/H)
* @atscmh_rs_code_mode_pri: RS code mode pri (only ATSC-M/H)
* @atscmh_rs_code_mode_sec: RS code mode sec (only ATSC-M/H)
* @atscmh_sccc_block_mode: Series Concatenated Convolutional Code (SCCC)
* Block Mode (only ATSC-M/H)
* @atscmh_sccc_code_mode_a: SCCC code mode A (only ATSC-M/H)
* @atscmh_sccc_code_mode_b: SCCC code mode B (only ATSC-M/H)
* @atscmh_sccc_code_mode_c: SCCC code mode C (only ATSC-M/H)
* @atscmh_sccc_code_mode_d: SCCC code mode D (only ATSC-M/H)
* @lna: Power ON/OFF/AUTO the Linear Now-noise Amplifier (LNA)
* @strength: DVBv5 API statistics: Signal Strength
* @cnr: DVBv5 API statistics: Signal to Noise ratio of the
* (main) carrier
* @pre_bit_error: DVBv5 API statistics: pre-Viterbi bit error count
* @pre_bit_count: DVBv5 API statistics: pre-Viterbi bit count
* @post_bit_error: DVBv5 API statistics: post-Viterbi bit error count
* @post_bit_count: DVBv5 API statistics: post-Viterbi bit count
* @block_error: DVBv5 API statistics: block error count
* @block_count: DVBv5 API statistics: block count
*
* NOTE: derivated statistics like Uncorrected Error blocks (UCE) are
* calculated on userspace.
*
* Only a subset of the properties are needed for a given delivery system.
* For more info, consult the media_api.html with the documentation of the
* Userspace API.
*/
struct dtv_frontend_properties {
u32 frequency;
enum fe_modulation modulation;
enum fe_sec_voltage voltage;
enum fe_sec_tone_mode sectone;
enum fe_spectral_inversion inversion;
enum fe_code_rate fec_inner;
enum fe_transmit_mode transmission_mode;
u32 bandwidth_hz; /* 0 = AUTO */
enum fe_guard_interval guard_interval;
enum fe_hierarchy hierarchy;
u32 symbol_rate;
enum fe_code_rate code_rate_HP;
enum fe_code_rate code_rate_LP;
enum fe_pilot pilot;
enum fe_rolloff rolloff;
enum fe_delivery_system delivery_system;
enum fe_interleaving interleaving;
/* ISDB-T specifics */
u8 isdbt_partial_reception;
u8 isdbt_sb_mode;
u8 isdbt_sb_subchannel;
u32 isdbt_sb_segment_idx;
u32 isdbt_sb_segment_count;
u8 isdbt_layer_enabled;
struct {
u8 segment_count;
enum fe_code_rate fec;
enum fe_modulation modulation;
u8 interleaving;
} layer[3];
/* Multistream specifics */
u32 stream_id;
/* Physical Layer Scrambling specifics */
u32 scrambling_sequence_index;
/* ATSC-MH specifics */
u8 atscmh_fic_ver;
u8 atscmh_parade_id;
u8 atscmh_nog;
u8 atscmh_tnog;
u8 atscmh_sgn;
u8 atscmh_prc;
u8 atscmh_rs_frame_mode;
u8 atscmh_rs_frame_ensemble;
u8 atscmh_rs_code_mode_pri;
u8 atscmh_rs_code_mode_sec;
u8 atscmh_sccc_block_mode;
u8 atscmh_sccc_code_mode_a;
u8 atscmh_sccc_code_mode_b;
u8 atscmh_sccc_code_mode_c;
u8 atscmh_sccc_code_mode_d;
u32 lna;
/* statistics data */
struct dtv_fe_stats strength;
struct dtv_fe_stats cnr;
struct dtv_fe_stats pre_bit_error;
struct dtv_fe_stats pre_bit_count;
struct dtv_fe_stats post_bit_error;
struct dtv_fe_stats post_bit_count;
struct dtv_fe_stats block_error;
struct dtv_fe_stats block_count;
};
#define DVB_FE_NO_EXIT 0
#define DVB_FE_NORMAL_EXIT 1
#define DVB_FE_DEVICE_REMOVED 2
#define DVB_FE_DEVICE_RESUME 3
/**
* struct dvb_frontend - Frontend structure to be used on drivers.
*
* @refcount: refcount to keep track of &struct dvb_frontend
* references
* @ops: embedded &struct dvb_frontend_ops
* @dvb: pointer to &struct dvb_adapter
* @demodulator_priv: demod private data
* @tuner_priv: tuner private data
* @frontend_priv: frontend private data
* @sec_priv: SEC private data
* @analog_demod_priv: Analog demod private data
* @dtv_property_cache: embedded &struct dtv_frontend_properties
* @callback: callback function used on some drivers to call
* either the tuner or the demodulator.
* @id: Frontend ID
* @exit: Used to inform the DVB core that the frontend
* thread should exit (usually, means that the hardware
* got disconnected.
*/
struct dvb_frontend {
struct kref refcount;
struct dvb_frontend_ops ops;
struct dvb_adapter *dvb;
void *demodulator_priv;
void *tuner_priv;
void *frontend_priv;
void *sec_priv;
void *analog_demod_priv;
struct dtv_frontend_properties dtv_property_cache;
#define DVB_FRONTEND_COMPONENT_TUNER 0
#define DVB_FRONTEND_COMPONENT_DEMOD 1
int (*callback)(void *adapter_priv, int component, int cmd, int arg);
int id;
unsigned int exit;
};
/**
* dvb_register_frontend() - Registers a DVB frontend at the adapter
*
* @dvb: pointer to &struct dvb_adapter
* @fe: pointer to &struct dvb_frontend
*
* Allocate and initialize the private data needed by the frontend core to
* manage the frontend and calls dvb_register_device() to register a new
* frontend. It also cleans the property cache that stores the frontend
* parameters and selects the first available delivery system.
*/
int dvb_register_frontend(struct dvb_adapter *dvb,
struct dvb_frontend *fe);
/**
* dvb_unregister_frontend() - Unregisters a DVB frontend
*
* @fe: pointer to &struct dvb_frontend
*
* Stops the frontend kthread, calls dvb_unregister_device() and frees the
* private frontend data allocated by dvb_register_frontend().
*
* NOTE: This function doesn't frees the memory allocated by the demod,
* by the SEC driver and by the tuner. In order to free it, an explicit call to
* dvb_frontend_detach() is needed, after calling this function.
*/
int dvb_unregister_frontend(struct dvb_frontend *fe);
/**
* dvb_frontend_detach() - Detaches and frees frontend specific data
*
* @fe: pointer to &struct dvb_frontend
*
* This function should be called after dvb_unregister_frontend(). It
* calls the SEC, tuner and demod release functions:
* &dvb_frontend_ops.release_sec, &dvb_frontend_ops.tuner_ops.release,
* &dvb_frontend_ops.analog_ops.release and &dvb_frontend_ops.release.
*
* If the driver is compiled with %CONFIG_MEDIA_ATTACH, it also decreases
* the module reference count, needed to allow userspace to remove the
* previously used DVB frontend modules.
*/
void dvb_frontend_detach(struct dvb_frontend *fe);
/**
* dvb_frontend_suspend() - Suspends a Digital TV frontend
*
* @fe: pointer to &struct dvb_frontend
*
* This function prepares a Digital TV frontend to suspend.
*
* In order to prepare the tuner to suspend, if
* &dvb_frontend_ops.tuner_ops.suspend\(\) is available, it calls it. Otherwise,
* it will call &dvb_frontend_ops.tuner_ops.sleep\(\), if available.
*
* It will also call &dvb_frontend_ops.sleep\(\) to put the demod to suspend.
*
* The drivers should also call dvb_frontend_suspend\(\) as part of their
* handler for the &device_driver.suspend\(\).
*/
int dvb_frontend_suspend(struct dvb_frontend *fe);
/**
* dvb_frontend_resume() - Resumes a Digital TV frontend
*
* @fe: pointer to &struct dvb_frontend
*
* This function resumes the usual operation of the tuner after resume.
*
* In order to resume the frontend, it calls the demod &dvb_frontend_ops.init\(\).
*
* If &dvb_frontend_ops.tuner_ops.resume\(\) is available, It, it calls it.
* Otherwise,t will call &dvb_frontend_ops.tuner_ops.init\(\), if available.
*
* Once tuner and demods are resumed, it will enforce that the SEC voltage and
* tone are restored to their previous values and wake up the frontend's
* kthread in order to retune the frontend.
*
* The drivers should also call dvb_frontend_resume() as part of their
* handler for the &device_driver.resume\(\).
*/
int dvb_frontend_resume(struct dvb_frontend *fe);
/**
* dvb_frontend_reinitialise() - forces a reinitialisation at the frontend
*
* @fe: pointer to &struct dvb_frontend
*
* Calls &dvb_frontend_ops.init\(\) and &dvb_frontend_ops.tuner_ops.init\(\),
* and resets SEC tone and voltage (for Satellite systems).
*
* NOTE: Currently, this function is used only by one driver (budget-av).
* It seems to be due to address some special issue with that specific
* frontend.
*/
void dvb_frontend_reinitialise(struct dvb_frontend *fe);
/**
* dvb_frontend_sleep_until() - Sleep for the amount of time given by
* add_usec parameter
*
* @waketime: pointer to &struct ktime_t
* @add_usec: time to sleep, in microseconds
*
* This function is used to measure the time required for the
* FE_DISHNETWORK_SEND_LEGACY_CMD() ioctl to work. It needs to be as precise
* as possible, as it affects the detection of the dish tone command at the
* satellite subsystem.
*
* Its used internally by the DVB frontend core, in order to emulate
* FE_DISHNETWORK_SEND_LEGACY_CMD() using the &dvb_frontend_ops.set_voltage\(\)
* callback.
*
* NOTE: it should not be used at the drivers, as the emulation for the
* legacy callback is provided by the Kernel. The only situation where this
* should be at the drivers is when there are some bugs at the hardware that
* would prevent the core emulation to work. On such cases, the driver would
* be writing a &dvb_frontend_ops.dishnetwork_send_legacy_command\(\) and
* calling this function directly.
*/
void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec);
#endif
|