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