1 /*
2 * Copyright (c) 2006-2023, RT-Thread Development Team
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 *
6 * Change Logs:
7 * Date Author Notes
8 * 2023/05/10 flyingcys first version
9 */
10
11 #include <rthw.h>
12 #include <rtdevice.h>
13
14 #ifdef BSP_USING_I2C
15 #include "drv_i2c.h"
16
17 #define DBG_TAG "DRV.I2C"
18 #define DBG_LVL DBG_WARNING
19 #include <rtdbg.h>
20
21 struct bl_i2c_bus
22 {
23 struct rt_i2c_bus_device parent;
24 struct bflb_device_s *i2c;
25 struct rt_mutex lock;
26 };
27
_i2c_master_xfer(struct rt_i2c_bus_device * bus,struct rt_i2c_msg * msgs,rt_uint32_t num)28 static rt_ssize_t _i2c_master_xfer(struct rt_i2c_bus_device *bus, struct rt_i2c_msg *msgs, rt_uint32_t num)
29 {
30 struct bl_i2c_bus *_i2c_bus = (struct bl_i2c_bus *)bus;
31 struct rt_i2c_msg *msg;
32 struct bflb_i2c_msg_s *bflb_i2c_msg;
33 int i;
34 int ret;
35
36 bflb_i2c_msg = rt_malloc(sizeof(struct bflb_i2c_msg_s) * num);
37 if (!bflb_i2c_msg)
38 {
39 LOG_E("i2c xfer malloc(%d) failure\n", sizeof(struct bflb_i2c_msg_s) * num);
40 return -RT_ENOMEM;
41 }
42
43 rt_memset(bflb_i2c_msg, 0, sizeof(struct bflb_i2c_msg_s) * num);
44
45 for (i = 0; i < num; i++)
46 {
47 msg = &msgs[i];
48 if (msg->flags & RT_I2C_RD)
49 {
50 bflb_i2c_msg[i].flags = I2C_M_READ;
51 }
52 else
53 {
54 bflb_i2c_msg[i].flags = 0;
55 }
56
57 if (_i2c_bus->parent.flags & RT_I2C_DEV_CTRL_10BIT)
58 {
59 bflb_i2c_msg[i].flags |= I2C_M_TEN;
60 }
61
62 bflb_i2c_msg[i].addr = msg->addr;
63 bflb_i2c_msg[i].length = msg->len;
64 bflb_i2c_msg[i].buffer = msg->buf;
65 }
66
67 rt_mutex_take(&_i2c_bus->lock, RT_WAITING_FOREVER);
68 ret = bflb_i2c_transfer(_i2c_bus->i2c, bflb_i2c_msg, num);
69 rt_mutex_release(&_i2c_bus->lock);
70
71 rt_free(bflb_i2c_msg);
72 bflb_i2c_msg = RT_NULL;
73
74 if (ret < 0)
75 {
76 i = 0;
77 LOG_E("i2c xfer failure %d\n", ret);
78 }
79
80 return i;
81 }
82
83 static const struct rt_i2c_bus_device_ops _i2c_ops =
84 {
85 _i2c_master_xfer,
86 RT_NULL,
87 RT_NULL
88 };
89
rt_hw_i2c_init(void)90 int rt_hw_i2c_init(void)
91 {
92 struct bflb_device_s *gpio;
93 gpio = bflb_device_get_by_name("gpio");
94
95 #ifdef BSP_USING_I2C0
96 static struct bl_i2c_bus i2c_bus0;
97
98 /* I2C0_SCL */
99 bflb_gpio_init(gpio, I2C0_GPIO_SCL, GPIO_FUNC_I2C0 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
100 /* I2C0_SDA */
101 bflb_gpio_init(gpio, I2C0_GPIO_SDA, GPIO_FUNC_I2C0 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
102
103 /* init i2c bus device */
104 rt_mutex_init(&i2c_bus0.lock, "i2c0_mutex", RT_IPC_FLAG_PRIO);
105
106 i2c_bus0.parent.ops = &_i2c_ops;
107 i2c_bus0.i2c = bflb_device_get_by_name("i2c0");
108 bflb_i2c_init(i2c_bus0.i2c, I2C0_FREQUENCY);
109
110 if (rt_i2c_bus_device_register(&i2c_bus0.parent, "i2c0") != RT_EOK)
111 LOG_E("i2c bus register:%s failure\n", "i2c0");
112 #endif
113
114 #ifdef BSP_USING_I2C1
115 static struct bl_i2c_bus i2c_bus1;
116
117 /* I2C1_SCL */
118 bflb_gpio_init(gpio, I2C1_GPIO_SCL, GPIO_FUNC_I2C1 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
119 /* I2C1_SDA */
120 bflb_gpio_init(gpio, I2C1_GPIO_SDA, GPIO_FUNC_I2C1 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
121
122 /* init i2c bus device */
123 rt_mutex_init(&i2c_bus1.lock, "i2c1_mutex", RT_IPC_FLAG_PRIO);
124
125 i2c_bus1.parent.ops = &_i2c_ops;
126 i2c_bus1.i2c = bflb_device_get_by_name("i2c1");
127 bflb_i2c_init(i2c_bus1.i2c, I2C1_FREQUENCY);
128
129 if (rt_i2c_bus_device_register(&i2c_bus1.parent, "i2c1") != RT_EOK)
130 LOG_E("i2c bus register:%s failure\n", "i2c1");
131 #endif
132
133 #ifdef BSP_USING_I2C2
134 static struct bl_i2c_bus i2c_bus2;
135
136 /* I2C2_SCL */
137 bflb_gpio_init(gpio, I2C2_GPIO_SCL, GPIO_FUNC_I2C2 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
138 /* I2C2_SDA */
139 bflb_gpio_init(gpio, I2C2_GPIO_SDA, GPIO_FUNC_I2C2 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
140
141 /* init i2c bus device */
142 rt_mutex_init(&i2c_bus2.lock, "i2c2_mutex", RT_IPC_FLAG_PRIO);
143
144 i2c_bus2.parent.ops = &_i2c_ops;
145 i2c_bus2.i2c = bflb_device_get_by_name("i2c2");
146 bflb_i2c_init(i2c_bus2.i2c, I2C2_FREQUENCY);
147
148 if (rt_i2c_bus_device_register(&i2c_bus2.parent, "i2c2") != RT_EOK)
149 LOG_E("i2c bus register:%s failure\n", "i2c2");
150 #endif
151
152 #ifdef BSP_USING_I2C3
153 static struct bl_i2c_bus i2c_bus3;
154
155 /* I2C3_SCL */
156 bflb_gpio_init(gpio, I2C3_GPIO_SCL, GPIO_FUNC_I2C3 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
157 /* I2C3_SDA */
158 bflb_gpio_init(gpio, I2C3_GPIO_SDA, GPIO_FUNC_I2C3 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
159
160 /* init i2c bus device */
161 rt_mutex_init(&i2c_bus3.lock, "i2c3_mutex", RT_IPC_FLAG_PRIO);
162
163 i2c_bus3.parent.ops = &_i2c_ops;
164 i2c_bus3.i2c = bflb_device_get_by_name("i2c3");
165 bflb_i2c_init(i2c_bus3.i2c, I2C3_FREQUENCY);
166
167 if (rt_i2c_bus_device_register(&i2c_bus3.parent, "i2c3") != RT_EOK)
168 LOG_E("i2c bus register:%s failure\n", "i2c3");
169 #endif
170
171 return 0;
172 }
173 INIT_BOARD_EXPORT(rt_hw_i2c_init);
174
175 #endif /* BSP_USING_I2C */
176