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@@ -0,0 +1,170 @@
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+/*
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+ * Copyright (c) 2006-2022, RT-Thread Development Team
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+ *
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+ * SPDX-License-Identifier: Apache-2.0
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+ *
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+ * Change Logs:
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+ * Date Author Notes
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+ * 2022-02-22 airm2m first version
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+ */
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+
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+#include <rtdevice.h>
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+#include <rtthread.h>
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+#include "board.h"
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+
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+#include <stdlib.h>
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+
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+#ifdef BSP_USING_HW_I2C
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+
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+#define DBG_TAG "drv.hwi2c"
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+#ifdef DRV_DEBUG
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+ #define DBG_LVL DBG_LOG
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+#else
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+ #define DBG_LVL DBG_INFO
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+#endif /* DRV_DEBUG */
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+#include <rtdbg.h>
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+
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+#include <hal_data.h>
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+
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+static struct rt_i2c_bus_device prv_ra_i2c;
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+static volatile i2c_master_event_t i2c_event = I2C_MASTER_EVENT_ABORTED;
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+
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+void i2c_master_callback(i2c_master_callback_args_t *p_args)
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+{
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+ if (NULL != p_args)
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+ {
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+ /* capture callback event for validating the i2c transfer event*/
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+ i2c_event = p_args->event;
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+ }
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+}
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+
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+static fsp_err_t validate_i2c_event(void)
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+{
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+ uint16_t local_time_out = UINT16_MAX;
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+
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+ /* resetting call back event capture variable */
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+ i2c_event = (i2c_master_event_t)0;
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+
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+ do
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+ {
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+ /* This is to avoid infinite loop */
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+ --local_time_out;
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+
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+ if(0 == local_time_out)
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+ {
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+ return FSP_ERR_TRANSFER_ABORTED;
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+ }
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+
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+ }while(i2c_event == 0);
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+
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+ if(i2c_event != I2C_MASTER_EVENT_ABORTED)
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+ {
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+ /* Make sure this is always Reset before return*/
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+ i2c_event = (i2c_master_event_t)0;
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+ return FSP_SUCCESS;
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+ }
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+
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+ /* Make sure this is always Reset before return */
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+ i2c_event = (i2c_master_event_t)0;
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+ return FSP_ERR_TRANSFER_ABORTED;
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+}
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+
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+static rt_size_t ra_i2c_mst_xfer(struct rt_i2c_bus_device *bus,
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+ struct rt_i2c_msg msgs[],
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+ rt_uint32_t num)
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+{
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+ rt_size_t i;
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+ struct rt_i2c_msg *msg = msgs;
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+ RT_ASSERT(bus != RT_NULL);
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+ fsp_err_t err = FSP_SUCCESS;
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+ bool restart = false;
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+
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+ for (i = 0; i < num; i++)
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+ {
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+ if (msg[i].flags & RT_I2C_NO_START)
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+ {
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+ restart = true;
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+ }
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+ if (msg[i].flags & RT_I2C_ADDR_10BIT)
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+ {
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+ LOG_E("10Bit not support");
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+ break;
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+ }
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+ else
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+ {
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+ g_i2c_master1_ctrl.slave = msg[i].addr;
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+ }
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+
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+ if (msg[i].flags & RT_I2C_RD)
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+ {
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+ err = R_IIC_MASTER_Read(&g_i2c_master1_ctrl, msg[i].buf, msg[i].len, restart);
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+ if (FSP_SUCCESS == err)
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+ {
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+ err = validate_i2c_event();
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+ /* handle error */
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+ if(FSP_ERR_TRANSFER_ABORTED == err)
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+ {
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+ LOG_E("POWER_CTL reg I2C read failed");
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+ break;
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+ }
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+ }
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+ /* handle error */
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+ else
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+ {
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+ /* Write API returns itself is not successful */
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+ LOG_E("R_IIC_MASTER_Write API failed");
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+ break;
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+ }
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+ }
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+ else
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+ {
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+ err = R_IIC_MASTER_Write(&g_i2c_master1_ctrl, msg[i].buf, msg[i].len, restart);
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+ if (FSP_SUCCESS == err)
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+ {
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+ err = validate_i2c_event();
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+ /* handle error */
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+ if(FSP_ERR_TRANSFER_ABORTED == err)
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+ {
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+ LOG_E("POWER_CTL reg I2C write failed");
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+ break;
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+ }
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+ }
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+ /* handle error */
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+ else
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+ {
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+ /* Write API returns itself is not successful */
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+ LOG_E("R_IIC_MASTER_Write API failed");
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+ break;
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+ }
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+ }
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+ }
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+ return i;
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+}
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+
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+static const struct rt_i2c_bus_device_ops ra_i2c_ops =
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+{
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+ .master_xfer = ra_i2c_mst_xfer,
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+ .slave_xfer = RT_NULL,
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+ .i2c_bus_control = RT_NULL
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+};
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+
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+int ra_hw_i2c_init(void)
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+{
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+ fsp_err_t err = FSP_SUCCESS;
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+ prv_ra_i2c.ops = &ra_i2c_ops;
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+ prv_ra_i2c.priv = 0;
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+ /* opening IIC master module */
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+ err = R_IIC_MASTER_Open(&g_i2c_master1_ctrl, &g_i2c_master1_cfg);
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+ /* handle error */
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+ if (FSP_SUCCESS != err)
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+ {
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+ LOG_E("R_IIC_MASTER_Open API failed");
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+ return err;
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+ }
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+ rt_i2c_bus_device_register(&prv_ra_i2c, "i2c1");
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+
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+ return 0;
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+}
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+INIT_DEVICE_EXPORT(ra_hw_i2c_init);
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+
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+#endif /* BSP_USING_I2C */
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