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/*
* Copyright (C) 2016 The Android Open Source 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.
*/
#ifndef SYSTEM_PERIPHERALMANAGER_DAEMON_GPIO_DRIVER_H_
#define SYSTEM_PERIPHERALMANAGER_DAEMON_GPIO_DRIVER_H_
#include <stdint.h>
#include <memory>
#include <string>
#include <android-base/unique_fd.h>
#include <base/macros.h>
#include <peripheralmanager/constants.h>
namespace android {
// This interface must be implemented by all
// Gpio drivers.
class GpioDriverInterface {
public:
GpioDriverInterface() {}
virtual ~GpioDriverInterface() {}
// TODO(leecam): Init should have generic params.
virtual bool Init(uint32_t index) = 0;
virtual bool SetValue(bool val) = 0;
virtual bool GetValue(bool* val) = 0;
virtual bool SetActiveType(GpioActiveType type) = 0;
virtual bool SetDirection(GpioDirection direction) = 0;
virtual bool SetEdgeType(GpioEdgeType type) = 0;
virtual bool GetPollingFd(::android::base::unique_fd* fd) = 0;
};
// The following is driver boilerplate.
// TODO(leecam): Abstract this into a seperate Driver class.
class GpioDriverInfoBase {
public:
GpioDriverInfoBase() {}
virtual ~GpioDriverInfoBase() {}
virtual std::string Compat() = 0;
virtual std::unique_ptr<GpioDriverInterface> Probe() = 0;
};
template <class T, class PARAM>
class GpioDriverInfo : public GpioDriverInfoBase {
public:
explicit GpioDriverInfo(PARAM param) : param_(param) {}
~GpioDriverInfo() override {}
std::string Compat() override { return T::Compat(); }
std::unique_ptr<GpioDriverInterface> Probe() override {
return std::unique_ptr<GpioDriverInterface>(new T(param_));
}
private:
PARAM param_;
};
} // namespace android
#endif // SYSTEM_PERIPHERALMANAGER_DAEMON_GPIO_DRIVER_H_
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