1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef _I2C_H_ 18 #define _I2C_H_ 19 20 #ifdef __cplusplus 21 extern "C" { 22 #endif 23 24 #include <stdint.h> 25 #include <stdbool.h> 26 #include <stddef.h> 27 28 typedef void (*I2cCallbackF)(void *cookie, size_t tx, size_t rx, int err); 29 30 int i2cMasterRequest(uint32_t busId, uint32_t speedInHz); 31 int i2cMasterRelease(uint32_t busId); 32 int i2cMasterTxRx(uint32_t busId, uint32_t addr, const void *txBuf, size_t txSize, 33 void *rxBuf, size_t rxSize, I2cCallbackF callback, void *cookie); 34 static inline int i2cMasterTx(uint32_t busId, uint32_t addr, 35 const void *txBuf, size_t txSize, I2cCallbackF callback, void *cookie) 36 { 37 return i2cMasterTxRx(busId, addr, txBuf, txSize, NULL, 0, callback, cookie);} 38 static inline int i2cMasterRx(uint32_t busId, uint32_t addr, 39 void *rxBuf, size_t rxSize, I2cCallbackF callback, void *cookie) 40 { 41 return i2cMasterTxRx(busId, addr, NULL, 0, rxBuf, rxSize, callback, cookie); 42 } 43 44 int i2cSlaveRequest(uint32_t busId, uint32_t addr); 45 int i2cSlaveRelease(uint32_t busId); 46 47 void i2cSlaveEnableRx(uint32_t busId, void *rxBuf, size_t rxSize, 48 I2cCallbackF callback, void *cookie); 49 int i2cSlaveTxPreamble(uint32_t busId, uint8_t byte, 50 I2cCallbackF callback, void *cookie); 51 int i2cSlaveTxPacket(uint32_t busId, const void *txBuf, size_t txSize, 52 I2cCallbackF callback, void *cookie); 53 54 #ifdef __cplusplus 55 } 56 #endif 57 58 #endif /* _I2C_H_ */ 59
