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hardware_samsung/hidl/vibrator/haptic/Vibrator.cpp

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/*
* Copyright (C) 2019 The LineageOS Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "android.hardware.vibrator@1.0-service.samsung-haptic"
#include <log/log.h>
#include <android-base/stringprintf.h>
#include <hardware/hardware.h>
#include <hardware/vibrator.h>
#include "Vibrator.h"
#include <cinttypes>
#include <cmath>
#include <fstream>
#include <iostream>
namespace android {
namespace hardware {
namespace vibrator {
namespace V1_0 {
namespace implementation {
/*
* Write value to path and close file.
*/
template <typename T>
static void set(const std::string& path, const T& value) {
std::ofstream file(path);
file << value << std::endl;
}
Vibrator::Vibrator() {
mIntensity = 10000;
}
// SEC Haptic Engine
Return<Status> Vibrator::doHaptic(int timeout, int intensity, int freq, int overdrive) {
std::string haptic =
android::base::StringPrintf("4 %d %d %d %d", timeout, intensity, freq, overdrive);
set("/sys/class/timed_output/vibrator/haptic_engine", haptic);
set("/sys/class/timed_output/vibrator/enable", 1);
return Status::OK;
}
// Methods from ::android::hardware::vibrator::V1_0::IVibrator follow.
Return<Status> Vibrator::on(uint32_t timeout_ms) {
return doHaptic(timeout_ms, mIntensity, 0, 0);
}
Return<Status> Vibrator::off() {
set("/sys/class/timed_output/vibrator/enable", 0);
return Status::OK;
}
Return<bool> Vibrator::supportsAmplitudeControl() {
return true;
}
Return<Status> Vibrator::setAmplitude(uint8_t amplitude) {
if (amplitude == 0) {
return Status::BAD_VALUE;
}
mIntensity = amplitude * 10000 / 255;
return Status::OK;
}
Return<void> Vibrator::perform(Effect effect, EffectStrength strength, perform_cb _hidl_cb) {
Status status = Status::OK;
uint32_t timeMS;
uint32_t intensity;
switch (strength) {
case EffectStrength::LIGHT:
intensity = 1000;
break;
case EffectStrength::STRONG:
intensity = 5000;
break;
default:
intensity = 3000;
break;
}
switch (effect) {
case Effect::CLICK:
case Effect::DOUBLE_CLICK:
status = doHaptic(7, intensity, 2000, 1);
timeMS = 7;
break;
default:
status = Status::UNSUPPORTED_OPERATION;
timeMS = 0;
break;
}
_hidl_cb(status, timeMS);
return Void();
}
} // namespace implementation
} // namespace V1_0
} // namespace vibrator
} // namespace hardware
} // namespace android