176 lines
4.8 KiB
C
176 lines
4.8 KiB
C
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/*
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* Copyright (c) 2006-2023, 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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* 2023/05/10 flyingcys first version
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*/
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#include <rthw.h>
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#include <rtdevice.h>
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#ifdef BSP_USING_I2C
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#include "drv_i2c.h"
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#define DBG_TAG "DRV.I2C"
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#define DBG_LVL DBG_WARNING
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#include <rtdbg.h>
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struct bl_i2c_bus
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{
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struct rt_i2c_bus_device parent;
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struct bflb_device_s *i2c;
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struct rt_mutex lock;
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};
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static rt_ssize_t _i2c_master_xfer(struct rt_i2c_bus_device *bus, struct rt_i2c_msg *msgs, rt_uint32_t num)
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{
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struct bl_i2c_bus *_i2c_bus = (struct bl_i2c_bus *)bus;
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struct rt_i2c_msg *msg;
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struct bflb_i2c_msg_s *bflb_i2c_msg;
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int i;
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int ret;
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bflb_i2c_msg = rt_malloc(sizeof(struct bflb_i2c_msg_s) * num);
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if (!bflb_i2c_msg)
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{
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LOG_E("i2c xfer malloc(%d) failure\n", sizeof(struct bflb_i2c_msg_s) * num);
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return -RT_ENOMEM;
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}
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rt_memset(bflb_i2c_msg, 0, sizeof(struct bflb_i2c_msg_s) * num);
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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_RD)
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{
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bflb_i2c_msg[i].flags = I2C_M_READ;
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}
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else
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{
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bflb_i2c_msg[i].flags = 0;
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}
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if (_i2c_bus->parent.flags & RT_I2C_DEV_CTRL_10BIT)
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{
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bflb_i2c_msg[i].flags |= I2C_M_TEN;
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}
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bflb_i2c_msg[i].addr = msg->addr;
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bflb_i2c_msg[i].length = msg->len;
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bflb_i2c_msg[i].buffer = msg->buf;
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}
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rt_mutex_take(&_i2c_bus->lock, RT_WAITING_FOREVER);
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ret = bflb_i2c_transfer(_i2c_bus->i2c, bflb_i2c_msg, num);
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rt_mutex_release(&_i2c_bus->lock);
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rt_free(bflb_i2c_msg);
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bflb_i2c_msg = RT_NULL;
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if (ret < 0)
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{
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i = 0;
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LOG_E("i2c xfer failure %d\n", ret);
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}
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return i;
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}
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static const struct rt_i2c_bus_device_ops _i2c_ops =
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{
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_i2c_master_xfer,
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RT_NULL,
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RT_NULL
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};
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int rt_hw_i2c_init(void)
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{
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struct bflb_device_s *gpio;
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gpio = bflb_device_get_by_name("gpio");
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#ifdef BSP_USING_I2C0
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static struct bl_i2c_bus i2c_bus0;
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/* I2C0_SCL */
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bflb_gpio_init(gpio, I2C0_GPIO_SCL, GPIO_FUNC_I2C0 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
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/* I2C0_SDA */
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bflb_gpio_init(gpio, I2C0_GPIO_SDA, GPIO_FUNC_I2C0 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
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/* init i2c bus device */
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rt_mutex_init(&i2c_bus0.lock, "i2c0_mutex", RT_IPC_FLAG_PRIO);
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i2c_bus0.parent.ops = &_i2c_ops;
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i2c_bus0.i2c = bflb_device_get_by_name("i2c0");
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bflb_i2c_init(i2c_bus0.i2c, I2C0_FREQUENCY);
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if (rt_i2c_bus_device_register(&i2c_bus0.parent, "i2c0") != RT_EOK)
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LOG_E("i2c bus register:%s failure\n", "i2c0");
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#endif
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#ifdef BSP_USING_I2C1
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static struct bl_i2c_bus i2c_bus1;
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/* I2C1_SCL */
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bflb_gpio_init(gpio, I2C1_GPIO_SCL, GPIO_FUNC_I2C1 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
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/* I2C1_SDA */
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bflb_gpio_init(gpio, I2C1_GPIO_SDA, GPIO_FUNC_I2C1 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
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/* init i2c bus device */
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rt_mutex_init(&i2c_bus1.lock, "i2c1_mutex", RT_IPC_FLAG_PRIO);
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i2c_bus1.parent.ops = &_i2c_ops;
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i2c_bus1.i2c = bflb_device_get_by_name("i2c1");
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bflb_i2c_init(i2c_bus1.i2c, I2C1_FREQUENCY);
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if (rt_i2c_bus_device_register(&i2c_bus1.parent, "i2c1") != RT_EOK)
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LOG_E("i2c bus register:%s failure\n", "i2c1");
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#endif
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#ifdef BSP_USING_I2C2
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static struct bl_i2c_bus i2c_bus2;
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/* I2C2_SCL */
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bflb_gpio_init(gpio, I2C2_GPIO_SCL, GPIO_FUNC_I2C2 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
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/* I2C2_SDA */
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bflb_gpio_init(gpio, I2C2_GPIO_SDA, GPIO_FUNC_I2C2 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
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/* init i2c bus device */
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rt_mutex_init(&i2c_bus2.lock, "i2c2_mutex", RT_IPC_FLAG_PRIO);
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i2c_bus2.parent.ops = &_i2c_ops;
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i2c_bus2.i2c = bflb_device_get_by_name("i2c2");
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bflb_i2c_init(i2c_bus2.i2c, I2C2_FREQUENCY);
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if (rt_i2c_bus_device_register(&i2c_bus2.parent, "i2c2") != RT_EOK)
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LOG_E("i2c bus register:%s failure\n", "i2c2");
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#endif
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#ifdef BSP_USING_I2C3
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static struct bl_i2c_bus i2c_bus3;
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/* I2C3_SCL */
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bflb_gpio_init(gpio, I2C3_GPIO_SCL, GPIO_FUNC_I2C3 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
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/* I2C3_SDA */
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bflb_gpio_init(gpio, I2C3_GPIO_SDA, GPIO_FUNC_I2C3 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
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/* init i2c bus device */
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rt_mutex_init(&i2c_bus3.lock, "i2c3_mutex", RT_IPC_FLAG_PRIO);
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i2c_bus3.parent.ops = &_i2c_ops;
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i2c_bus3.i2c = bflb_device_get_by_name("i2c3");
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bflb_i2c_init(i2c_bus3.i2c, I2C3_FREQUENCY);
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if (rt_i2c_bus_device_register(&i2c_bus3.parent, "i2c3") != RT_EOK)
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LOG_E("i2c bus register:%s failure\n", "i2c3");
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#endif
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return 0;
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}
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INIT_BOARD_EXPORT(rt_hw_i2c_init);
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#endif /* BSP_USING_I2C */
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