/*
 * Copyright (C) 2020-2021 Alibaba Group Holding Limited
 */

#ifndef AOS_I2C_H
#define AOS_I2C_H

#include <aos/device.h>

#define AOS_I2C_MCFG_TX         ((uint32_t)0x0 << 0)
#define AOS_I2C_MCFG_RX         ((uint32_t)0x1 << 0)
#define AOS_I2C_MCFG_ADDR_7     ((uint32_t)0x0 << 1)
#define AOS_I2C_MCFG_ADDR_10    ((uint32_t)0x1 << 1)

typedef aos_dev_ref_t aos_i2c_ref_t;

typedef struct {
    uint32_t cfg;
    uint16_t addr;
    size_t count;
    void *buf;
} aos_i2c_msg_t;

#define AOS_I2C_MSG_INIT_VAL \
    { \
        .cfg    = 0, \
        .addr   = 0, \
        .count  = 0, \
        .buf    = NULL, \
    }

#define aos_i2c_msg_init(x)     do { *(x) = (aos_i2c_msg_t)AOS_I2C_MSG_INIT_VAL; } while (0)

#ifdef __cplusplus
extern "C" {
#endif

/**
 * @brief       Get a I2C device.
 * @param[out]  ref     I2C ref to operate
 * @param[in]   id      I2C device ID
 * @return      0: on success; < 0: on failure
 */
aos_status_t aos_i2c_get(aos_i2c_ref_t *ref, uint32_t id);
/**
 * @brief       Release a I2C device.
 * @param[in]   ref     I2C ref to operate
 * @return      None
 */
void aos_i2c_put(aos_i2c_ref_t *ref);
/**
 * @brief       Synchronous I2C data transfer.
 * @param[in]   ref             I2C ref to operate
 * @param[in]   msgs            array of messages
 * @param[in]   num_msgs        number of messages
 * @return      0: on success; < 0: on failure
 */
aos_status_t aos_i2c_transfer(aos_i2c_ref_t *ref, const aos_i2c_msg_t *msgs, size_t num_msgs);

#ifdef __cplusplus
}
#endif

#endif /* AOS_I2C_H */