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/*
* Copyright (c) 2006-2024 RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2023-08-21 hywing The first version
*/
#include <rtdevice.h>
#include "fsl_lpi2c.h"
#include "fsl_lpi2c_edma.h"
#include "fsl_edma.h"
#ifdef RT_USING_I2C
#define DBG_TAG "drv.i2c"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
#if (defined(CPU_MCXA346VLH) || defined(CPU_MCXA346VLL) || defined(CPU_MCXA346VLQ) || defined(CPU_MCXA346VPN) || \
defined(CPU_MCXA366VLH) || defined(CPU_MCXA366VLL) || defined(CPU_MCXA366VLQ) || defined(CPU_MCXA366VPN))
#define MCXA_I2C_USE_FRO_LF_DIV
#endif
enum
{
#ifdef BSP_USING_I2C0
I2C0_INDEX,
#endif
#ifdef BSP_USING_I2C1
I2C1_INDEX,
#endif
#ifdef BSP_USING_I2C2
I2C2_INDEX,
#endif
#ifdef BSP_USING_I2C3
I2C3_INDEX,
#endif
};
struct lpc_i2c_bus
{
struct rt_i2c_bus_device parent;
LPI2C_Type *I2C;
clock_attach_id_t clock_attach_id;
clock_div_name_t clock_div_name;
clock_name_t clock_src;
uint32_t baud;
char *name;
};
struct lpc_i2c_bus lpc_obj[] =
{
#ifdef BSP_USING_I2C0
{
.I2C = LPI2C0,
.baud = 100000U,
#if defined(MCXA_I2C_USE_FRO_LF_DIV)
.clock_attach_id = kFRO_LF_DIV_to_LPI2C0,
#else
.clock_attach_id = kFRO12M_to_LPI2C0,
#endif
.clock_div_name = kCLOCK_DivLPI2C0,
.clock_src = kCLOCK_Fro12M,
.name = "i2c0",
},
#endif
#ifdef BSP_USING_I2C1
{
.I2C = LPI2C1,
.baud = 100000U,
#if defined(MCXA_I2C_USE_FRO_LF_DIV)
.clock_attach_id = kFRO_LF_DIV_to_LPI2C1,
#else
.clock_attach_id = kFRO12M_to_LPI2C1,
#endif
.clock_div_name = kCLOCK_DivLPI2C1,
.clock_src = kCLOCK_Fro12M,
.name = "i2c1",
},
#endif
#ifdef BSP_USING_I2C2
{
.I2C = LPI2C2,
.baud = 100000U,
#if defined(MCXA_I2C_USE_FRO_LF_DIV)
.clock_attach_id = kFRO_LF_DIV_to_LPI2C2,
#else
.clock_attach_id = kFRO12M_to_LPI2C2,
#endif
.clock_div_name = kCLOCK_DivLPI2C2,
.clock_src = kCLOCK_Fro12M,
.name = "i2c2",
},
#endif
#ifdef BSP_USING_I2C3
{
.I2C = LPI2C3,
.baud = 100000U,
#if defined(MCXA_I2C_USE_FRO_LF_DIV)
.clock_attach_id = kFRO_LF_DIV_to_LPI2C3,
#else
.clock_attach_id = kFRO12M_to_LPI2C3,
#endif
.clock_div_name = kCLOCK_DivLPI2C3,
.clock_src = kCLOCK_Fro12M,
.name = "i2c3",
},
#endif
};
static rt_ssize_t lpc_i2c_xfer(struct rt_i2c_bus_device *bus, struct rt_i2c_msg msgs[], rt_uint32_t num)
{
struct rt_i2c_msg *msg;
lpi2c_master_transfer_t xfer = {0};
rt_uint32_t i;
rt_ssize_t ret = 0;
struct lpc_i2c_bus *lpc_i2c = (struct lpc_i2c_bus *)bus;
for (i = 0; i < num; i++)
{
msg = &msgs[i];
if (msg->flags & RT_I2C_RD)
{
xfer.slaveAddress = msg->addr;
xfer.direction = kLPI2C_Read;
xfer.subaddress = 0;
xfer.subaddressSize = 0;
xfer.data = msg->buf;
xfer.dataSize = msg->len;
if(i != 0)
xfer.flags = kLPI2C_TransferRepeatedStartFlag;
else
xfer.flags = kLPI2C_TransferDefaultFlag;
if (LPI2C_MasterTransferBlocking(lpc_i2c->I2C, &xfer) != kStatus_Success)
{
LOG_D("i2c bus read failed!\n");
return i;
}
}
else
{
xfer.slaveAddress = msg->addr;
xfer.direction = kLPI2C_Write;
xfer.subaddress = 0;
xfer.subaddressSize = 0;
xfer.data = msg->buf;
xfer.dataSize = msg->len;
if(i == 0)
xfer.flags = kLPI2C_TransferNoStopFlag;
else
xfer.flags = kLPI2C_TransferDefaultFlag;
if (LPI2C_MasterTransferBlocking(lpc_i2c->I2C, &xfer) != kStatus_Success)
{
LOG_D("i2c bus write failed!\n");
return i;
}
}
}
ret = i;
return ret;
}
static const struct rt_i2c_bus_device_ops i2c_ops =
{
lpc_i2c_xfer,
RT_NULL,
RT_NULL
};
int rt_hw_i2c_init(void)
{
int i;
lpi2c_master_config_t masterConfig;
for(i=0; i<ARRAY_SIZE(lpc_obj); i++)
{
CLOCK_SetClockDiv(lpc_obj[i].clock_div_name, 1u);
CLOCK_AttachClk(lpc_obj[i].clock_attach_id);
LPI2C_MasterGetDefaultConfig(&masterConfig);
masterConfig.baudRate_Hz = lpc_obj[i].baud;
LPI2C_MasterInit(lpc_obj[i].I2C, &masterConfig, CLOCK_GetFreq(lpc_obj[i].clock_src));
lpc_obj[i].parent.ops = &i2c_ops;
rt_i2c_bus_device_register(&lpc_obj[i].parent, lpc_obj[i].name);
}
return RT_EOK;
}
INIT_DEVICE_EXPORT(rt_hw_i2c_init);
#endif /* RT_USING_I2C */
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