153 lines
3.3 KiB
C
153 lines
3.3 KiB
C
/*
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* Copyright (c) 2022 HPMicro
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*
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*/
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#include <rtthread.h>
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#include <rtdevice.h>
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#include <rtdbg.h>
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#ifdef BSP_USING_I2C
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#include "drv_i2c.h"
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#include "hpm_i2c_drv.h"
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#include "board.h"
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#ifdef RT_USING_I2C
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struct hpm_i2c
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{
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struct rt_i2c_bus_device bus;
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I2C_Type *base;
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clock_name_t clk_name;
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char *bus_name;
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};
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static struct hpm_i2c hpm_i2cs[] =
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{
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#if defined(BSP_USING_I2C0)
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{
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.base = HPM_I2C0,
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.bus_name = "i2c0",
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.clk_name = clock_i2c0,
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},
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#endif
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#if defined(BSP_USING_I2C1)
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{
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.base = HPM_I2C1,
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.bus_name = "i2c1",
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.clk_name = clock_i2c1,
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},
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#endif
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#if defined(BSP_USING_I2C2)
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{
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.base = HPM_I2C2,
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.bus_name = "i2c2",
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.clk_name = clock_i2c2,
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},
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#endif
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#if defined(BSP_USING_I2C3)
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{
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.base = HPM_I2C3,
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.bus_name = "i2c3",
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.clk_name = clock_i2c3,
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},
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#endif
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};
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static rt_ssize_t hpm_i2c_master_transfer(struct rt_i2c_bus_device *bus, struct rt_i2c_msg msgs[], rt_uint32_t num);
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struct rt_i2c_bus_device_ops hpm_i2c_ops =
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{
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hpm_i2c_master_transfer,
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RT_NULL,
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RT_NULL
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};
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static rt_ssize_t hpm_i2c_master_transfer(struct rt_i2c_bus_device *bus, struct rt_i2c_msg msgs[], rt_uint32_t num)
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{
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RT_ASSERT(bus != RT_NULL);
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RT_ASSERT(msgs != RT_NULL);
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struct rt_i2c_msg *msg;
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struct hpm_i2c *i2c_info = (struct hpm_i2c *)bus;
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hpm_stat_t i2c_stat = status_success;
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rt_size_t ret = 0;
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rt_uint32_t i;
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for (i = 0; i < num; i++)
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{
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msg = &msgs[i];
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if (msg->flags & RT_I2C_ADDR_10BIT)
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{
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i2c_enable_10bit_address_mode(i2c_info->base, true);
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}
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else
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{
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i2c_enable_10bit_address_mode(i2c_info->base, false);
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}
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if (msg->flags & RT_I2C_RD)
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{
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i2c_stat = i2c_master_read(i2c_info->base, msg->addr, msg->buf, msg->len);
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}
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else
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{
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i2c_stat = i2c_master_write(i2c_info->base, msg->addr, msg->buf, msg->len);
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}
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if (i2c_stat != status_success)
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{
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break;
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}
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}
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if (i2c_stat != status_success)
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{
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return ret;
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}
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ret = i;
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return ret;
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}
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int rt_hw_i2c_init(void)
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{
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rt_err_t ret = RT_EOK;
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hpm_stat_t stat;
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i2c_config_t config;
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rt_uint32_t freq;
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for (uint32_t i = 0; i < sizeof(hpm_i2cs) / sizeof(hpm_i2cs[0]); i++) {
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init_i2c_pins(hpm_i2cs[i].base);
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clock_add_to_group(hpm_i2cs[i].clk_name, 0);
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clock_set_source_divider(hpm_i2cs[i].clk_name, clk_src_osc24m, 1U);
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config.i2c_mode = i2c_mode_normal;
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config.is_10bit_addressing = false;
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freq = clock_get_frequency(hpm_i2cs[i].clk_name);
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stat = i2c_init_master(hpm_i2cs[i].base, freq, &config);
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if (stat != status_success) {
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LOG_E("rt i2c device %s init failed", hpm_i2cs[i].bus_name);
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}
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hpm_i2cs[i].bus.ops = &hpm_i2c_ops;
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ret = rt_i2c_bus_device_register(&hpm_i2cs[i].bus, hpm_i2cs[i].bus_name);
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if (ret != RT_EOK) {
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LOG_E("rt i2c device %s register failed, status=%d\n", hpm_i2cs[i].bus_name, ret);
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}
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}
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return ret;
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}
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INIT_DEVICE_EXPORT(rt_hw_i2c_init);
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#endif /* RT_USING_I2C */
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#endif /*BSP_USING_I2C*/
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