| /* |
| * 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_SPI_DRIVER_SPIDEV_H_ |
| #define SYSTEM_PERIPHERALMANAGER_DAEMON_SPI_DRIVER_SPIDEV_H_ |
| |
| #include <stdint.h> |
| |
| #include <memory> |
| |
| #include <base/macros.h> |
| |
| #include "char_device.h" |
| #include "spi_driver.h" |
| |
| namespace android { |
| |
| class SpiDriverSpiDev : public SpiDriverInterface { |
| public: |
| explicit SpiDriverSpiDev(CharDeviceFactory* char_device_factory); |
| ~SpiDriverSpiDev(); |
| |
| static std::string Compat() { return "SPIDEV"; } |
| |
| bool Init(uint32_t bus_id, uint32_t cs) override; |
| bool Transfer(const void* tx_data, void* rx_data, size_t len) override; |
| bool SetFrequency(uint32_t speed_hz) override; |
| bool SetMode(SpiMode mode) override; |
| bool SetBitJustification(bool lsb_first) override; |
| bool SetBitsPerWord(uint8_t bits_per_word) override; |
| bool SetDelay(uint16_t delay_usecs) override; |
| |
| private: |
| bool GetMaxFrequency(uint32_t* max_freq); |
| |
| int fd_; |
| uint32_t bits_per_word_; |
| uint32_t speed_hz_; |
| uint16_t delay_usecs_; |
| std::unique_ptr<CharDeviceInterface> char_interface_; |
| |
| // Used for unit testing and is null in production. |
| // Ownership is in the test and outlives this class. |
| CharDeviceFactory* char_device_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(SpiDriverSpiDev); |
| }; |
| |
| } // namespace android |
| |
| #endif // SYSTEM_PERIPHERALMANAGER_DAEMON_SPI_DEVICE_H_ |