| /****************************************************************************** |
| * |
| * Copyright (C) 2018 ST Microelectronics S.A. |
| * |
| * 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 SPILAYERDRIVER_H_ |
| #define SPILAYERDRIVER_H_ |
| |
| #include <fcntl.h> |
| #include <linux/spi/spidev.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <sys/ioctl.h> |
| #include <unistd.h> |
| #include "SpiLayerInterface.h" |
| |
| #define ATP_FILE_PATH "/data/vendor/ese/atp.bin" |
| |
| #define MODE_TX 0 |
| #define MODE_RX 1 |
| #define MIN_TIME_BETWEEN_MODE_SWITCH 1 |
| #define ST54J_SE_MAGIC 0xE5 |
| #define ST54J_SE_PULSE_RESET _IOR(ST54J_SE_MAGIC, 0x01, unsigned int) |
| |
| /** |
| * Initialize internal variables. |
| * |
| * @return null |
| */ |
| |
| void SpiLayerDriver_init(SpiDriver_config_t* tSpiDriver); |
| |
| /** |
| * Open the spi device driver. |
| * |
| * @return -1 if an error occurred, file descriptor if success. |
| */ |
| int SpiLayerDriver_open(char *spiDevPath); |
| |
| /** |
| * Close the spi device driver. |
| * |
| */ |
| void SpiLayerDriver_close(); |
| |
| /** |
| * Reads bytesToRead bytes from the SPI interface. |
| * |
| * @param rxBuffer The buffer where the received bytes are stored. |
| * @param bytesToRead The expected number of bytes to be read. |
| * |
| * @return The amount of bytes read from the slave, -1 if something failed. |
| */ |
| int SpiLayerDriver_read(uint8_t *rxBuffer, unsigned int bytesToRead); |
| |
| /** |
| * Write txBufferLength bytes to the SPI interface. |
| * |
| * @param txBuffer The buffer where the bytes to write are placed. |
| * @param txBufferLength The number of bytes to be written. |
| * |
| * @return The amount of bytes written to the slave, -1 if something failed. |
| */ |
| int SpiLayerDriver_write(uint8_t *writeBuffer, unsigned int bytesToWrite); |
| |
| /** |
| * Send a Reset pulse to the eSE. |
| * |
| * @return 0 if success, -1 if something failed. |
| */ |
| int SpiLayerDriver_reset(); |
| |
| #endif /* SPILAYERDRIVER_H_ */ |