/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* The Virtual DTV test driver serves as a reference DVB driver and helps
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* validate the existing APIs in the media subsystem. It can also aid
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* developers working on userspace applications.
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*
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* When this module is loaded, it will attempt to modprobe 'dvb_vidtv_tuner' and 'dvb_vidtv_demod'.
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*
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* Copyright (C) 2020 Daniel W. S. Almeida
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*/
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#ifndef VIDTV_BRIDGE_H
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#define VIDTV_BRIDGE_H
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/*
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* For now, only one frontend is supported. See vidtv_start_streaming()
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*/
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#define NUM_FE 1
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#include <linux/i2c.h>
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#include <linux/platform_device.h>
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#include <linux/types.h>
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#include <media/dmxdev.h>
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#include <media/dvb_demux.h>
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#include <media/dvb_frontend.h>
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#include "vidtv_mux.h"
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/**
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* struct vidtv_dvb - Vidtv bridge state
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* @pdev: The platform device. Obtained when the bridge is probed.
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* @fe: The frontends. Obtained when probing the demodulator modules.
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* @adapter: Represents a DTV adapter. See 'dvb_register_adapter'.
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* @demux: The demux used by the dvb_dmx_swfilter_packets() call.
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* @dmx_dev: Represents a demux device.
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* @dmx_fe: The frontends associated with the demux.
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* @i2c_adapter: The i2c_adapter associated with the bridge driver.
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* @i2c_client_demod: The i2c_clients associated with the demodulator modules.
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* @i2c_client_tuner: The i2c_clients associated with the tuner modules.
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* @nfeeds: The number of feeds active.
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* @feed_lock: Protects access to the start/stop stream logic/data.
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* @streaming: Whether we are streaming now.
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* @mux: The abstraction responsible for delivering MPEG TS packets to the bridge.
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*/
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struct vidtv_dvb {
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struct platform_device *pdev;
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struct dvb_frontend *fe[NUM_FE];
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struct dvb_adapter adapter;
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struct dvb_demux demux;
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struct dmxdev dmx_dev;
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struct dmx_frontend dmx_fe[NUM_FE];
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struct i2c_adapter i2c_adapter;
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struct i2c_client *i2c_client_demod[NUM_FE];
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struct i2c_client *i2c_client_tuner[NUM_FE];
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u32 nfeeds;
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struct mutex feed_lock; /* Protects access to the start/stop stream logic/data. */
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bool streaming;
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struct vidtv_mux *mux;
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};
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#endif // VIDTV_BRIDG_H
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