1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * The Virtual DTV test driver serves as a reference DVB driver and helps
4 * validate the existing APIs in the media subsystem. It can also aid
5 * developers working on userspace applications.
6 *
7 * When this module is loaded, it will attempt to modprobe 'dvb_vidtv_tuner' and 'dvb_vidtv_demod'.
8 *
9 * Copyright (C) 2020 Daniel W. S. Almeida
10 */
11
12#ifndef VIDTV_BRIDGE_H
13#define VIDTV_BRIDGE_H
14
15/*
16 * For now, only one frontend is supported. See vidtv_start_streaming()
17 */
18#define NUM_FE 1
19
20#include <linux/i2c.h>
21#include <linux/platform_device.h>
22#include <linux/types.h>
23
24#include <media/dmxdev.h>
25#include <media/dvb_demux.h>
26#include <media/dvb_frontend.h>
27
28#include "vidtv_mux.h"
29
30/**
31 * struct vidtv_dvb - Vidtv bridge state
32 * @pdev: The platform device. Obtained when the bridge is probed.
33 * @fe: The frontends. Obtained when probing the demodulator modules.
34 * @adapter: Represents a DTV adapter. See 'dvb_register_adapter'.
35 * @demux: The demux used by the dvb_dmx_swfilter_packets() call.
36 * @dmx_dev: Represents a demux device.
37 * @dmx_fe: The frontends associated with the demux.
38 * @i2c_adapter: The i2c_adapter associated with the bridge driver.
39 * @i2c_client_demod: The i2c_clients associated with the demodulator modules.
40 * @i2c_client_tuner: The i2c_clients associated with the tuner modules.
41 * @nfeeds: The number of feeds active.
42 * @feed_lock: Protects access to the start/stop stream logic/data.
43 * @streaming: Whether we are streaming now.
44 * @mux: The abstraction responsible for delivering MPEG TS packets to the bridge.
45 */
46struct vidtv_dvb {
47	struct platform_device *pdev;
48	struct dvb_frontend *fe[NUM_FE];
49	struct dvb_adapter adapter;
50	struct dvb_demux demux;
51	struct dmxdev dmx_dev;
52	struct dmx_frontend dmx_fe[NUM_FE];
53	struct i2c_adapter i2c_adapter;
54	struct i2c_client *i2c_client_demod[NUM_FE];
55	struct i2c_client *i2c_client_tuner[NUM_FE];
56
57	u32 nfeeds;
58	struct mutex feed_lock; /* Protects access to the start/stop stream logic/data. */
59
60	bool streaming;
61
62	struct vidtv_mux *mux;
63};
64
65#endif // VIDTV_BRIDG_H
66