LXR linux/drivers/media/test-drivers/vidtv/vidtv

   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#define VIDTV_PDEV_NAME "vidtv"
  20
  21#include <linux/i2c.h>
  22#include <linux/platform_device.h>
  23#include <linux/types.h>
  24
  25#include <media/dmxdev.h>
  26#include <media/dvb_demux.h>
  27#include <media/dvb_frontend.h>
  28#include <media/media-device.h>
  29
  30#include "vidtv_mux.h"
  31
  32/**
  33 * struct vidtv_dvb - Vidtv bridge state
  34 * @pdev: The platform device. Obtained when the bridge is probed.
  35 * @fe: The frontends. Obtained when probing the demodulator modules.
  36 * @adapter: Represents a DTV adapter. See 'dvb_register_adapter'.
  37 * @demux: The demux used by the dvb_dmx_swfilter_packets() call.
  38 * @dmx_dev: Represents a demux device.
  39 * @dmx_fe: The frontends associated with the demux.
  40 * @i2c_adapter: The i2c_adapter associated with the bridge driver.
  41 * @i2c_client_demod: The i2c_clients associated with the demodulator modules.
  42 * @i2c_client_tuner: The i2c_clients associated with the tuner modules.
  43 * @nfeeds: The number of feeds active.
  44 * @feed_lock: Protects access to the start/stop stream logic/data.
  45 * @streaming: Whether we are streaming now.
  46 * @mux: The abstraction responsible for delivering MPEG TS packets to the bridge.
  47 * @mdev: The media_device struct for media controller support.
  48 */
  49struct vidtv_dvb {
  50        struct platform_device *pdev;
  51        struct dvb_frontend *fe[NUM_FE];
  52        struct dvb_adapter adapter;
  53        struct dvb_demux demux;
  54        struct dmxdev dmx_dev;
  55        struct dmx_frontend dmx_fe[NUM_FE];
  56        struct i2c_adapter i2c_adapter;
  57        struct i2c_client *i2c_client_demod[NUM_FE];
  58        struct i2c_client *i2c_client_tuner[NUM_FE];
  59
  60        u32 nfeeds;
  61        struct mutex feed_lock; /* Protects access to the start/stop stream logic/data. */
  62
  63        bool streaming;
  64
  65        struct vidtv_mux *mux;
  66
  67#ifdef CONFIG_MEDIA_CONTROLLER_DVB
  68        struct media_device mdev;
  69#endif /* CONFIG_MEDIA_CONTROLLER_DVB */
  70};
  71
  72#endif // VIDTV_BRIDG_H
  73