peripheralmanager/daemon/i2c_driver_i2cdev.h

/*
 * 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_I2C_DRIVER_I2CDEV_H_
#define SYSTEM_PERIPHERALMANAGER_DAEMON_I2C_DRIVER_I2CDEV_H_

#include <stdint.h>

#include <memory>

#include <base/macros.h>

#include "char_device.h"
#include "i2c_driver.h"

namespace android {

class I2cDriverI2cDev : public I2cDriverInterface {
 public:
  explicit I2cDriverI2cDev(CharDeviceFactory* char_device_factory);
  ~I2cDriverI2cDev();

  static std::string Compat() { return "I2CDEV"; }

  bool Init(uint32_t bus_id, uint32_t address) override;

  int32_t Read(void* data, uint32_t size, uint32_t* bytes_read) override;
  int32_t ReadRegByte(uint8_t reg, uint8_t* val) override;
  int32_t ReadRegWord(uint8_t reg, uint16_t* val) override;
  int32_t ReadRegBuffer(uint8_t reg,
                        uint8_t* data,
                        uint32_t size,
                        uint32_t* bytes_read) override;

  int32_t Write(const void* data,
                uint32_t size,
                uint32_t* bytes_written) override;
  int32_t WriteRegByte(uint8_t reg, uint8_t val) override;
  int32_t WriteRegWord(uint8_t reg, uint16_t val) override;
  int32_t WriteRegBuffer(uint8_t reg,
                         const uint8_t* data,
                         uint32_t size,
                         uint32_t* bytes_written) override;

 private:
  int fd_;

  // Used for unit testing and is null in production.
  // Ownership is in the test and outlives this class.
  CharDeviceFactory* char_device_factory_;
  std::unique_ptr<CharDeviceInterface> char_interface_;
  DISALLOW_COPY_AND_ASSIGN(I2cDriverI2cDev);
};

}  // namespace android

#endif  // SYSTEM_PERIPHERALMANAGER_DAEMON_I2C_DRIVER_I2CDEV_H_