114 lines
2.5 KiB
C++
114 lines
2.5 KiB
C++
/*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*
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* Copyright (C) 2019, Harshit Jain
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*/
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#define LOG_TAG "android.hardware.light@2.0-service.msm8953"
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#include <log/log.h>
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#include <fstream>
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#include "Light.h"
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namespace android {
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namespace hardware {
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namespace light {
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namespace V2_0 {
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namespace implementation {
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#define LEDS "/sys/class/leds/"
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#define LCD_LED LEDS "lcd-backlight/"
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#define BRIGHTNESS "brightness"
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#define WHITE LEDS "white/"
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/*
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* Write value to path and close file.
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*/
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static void set(std::string path, std::string value) {
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std::ofstream file(path);
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/* Only write brightness value if stream is open, alive & well */
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if (file.is_open()) {
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file << value;
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} else {
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/* Fire a warning a bail out */
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ALOGE("failed to write %s to %s", value.c_str(), path.c_str());
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return;
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}
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}
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static void set(std::string path, int value) {
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set(path, std::to_string(value));
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}
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static inline bool isLit(const LightState& state) {
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return state.color & 0x00ffffff;
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}
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/*
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* Device specific methods
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*/
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static void Backlight(const LightState& state) {
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uint32_t brightness = state.color & 0xFF;
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set(LCD_LED BRIGHTNESS, brightness);
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}
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static inline void Led(const LightState& state, uint32_t pattern) {
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isLit(state) ? set(WHITE BRIGHTNESS, pattern) : set(WHITE BRIGHTNESS, 0);
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}
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static void Notification(const LightState& state) {
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/* Fast blink */
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Led(state, 1);
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}
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static void Attention(const LightState& state) {
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/* Slow blink */
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Led(state, 2);
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}
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static void ChargingNotification(const LightState& state) {
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/* Steady Led */
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Led(state, 3);
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}
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static std::map<Type, std::function<void(const LightState&)>> lights = {
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{Type::BACKLIGHT, Backlight},
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{Type::NOTIFICATIONS, Notification},
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{Type::BATTERY, ChargingNotification},
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{Type::ATTENTION, Attention},
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};
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Light::Light() {}
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Return<Status> Light::setLight(Type type, const LightState& state) {
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auto it = lights.find(type);
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if (it == lights.end()) {
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return Status::LIGHT_NOT_SUPPORTED;
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}
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/*
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* Lock global mutex until light state is updated.
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*/
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std::lock_guard<std::mutex> lock(globalLock);
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it->second(state);
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return Status::SUCCESS;
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}
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Return<void> Light::getSupportedTypes(getSupportedTypes_cb _hidl_cb) {
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std::vector<Type> types;
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for (auto const& light : lights) types.push_back(light.first);
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_hidl_cb(types);
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return Void();
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}
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/* Close all the namespaces */
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}
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}
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}
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}
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}
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