1 /*
2  * Copyright (c) 2006-2022, RT-Thread Development Team
3  *
4  * SPDX-License-Identifier: Apache-2.0
5  *
6  * Change Logs:
7  * Date           Author       Notes
8  * 2021-11-15     JasonHu      first version
9  */
10 #include <rtthread.h>
11 #include <rthw.h>
12 #include <rtdevice.h>
13 #include <sunxi_hal_watchdog.h>
14 
15 #define DBG_SECTION_NAME "wdt"
16 #include <rtdbg.h>
17 
18 #if defined(RT_USING_WDT) && defined(BSP_USING_WDT)
19 
20 /* hardware only support (1-16)s */
21 static rt_uint32_t wdg_timeout = 0;
22 
wdg_init(rt_watchdog_t * wdt)23 static rt_err_t wdg_init(rt_watchdog_t *wdt)
24 {
25     wdg_timeout = 0;
26     hal_watchdog_init();
27     return RT_EOK;
28 }
29 
wdg_control(rt_watchdog_t * wdt,int cmd,void * arg)30 static rt_err_t wdg_control(rt_watchdog_t *wdt, int cmd, void *arg)
31 {
32     switch (cmd)
33     {
34     case RT_DEVICE_CTRL_WDT_SET_TIMEOUT:
35         if (arg)
36         {
37             wdg_timeout = *(rt_uint32_t *)arg;
38         }
39         else
40         {
41             LOG_E("arg is NULL!");
42             return -RT_EIO;
43         }
44         break;
45     case RT_DEVICE_CTRL_WDT_GET_TIMEOUT:
46         if (arg)
47         {
48             *((rt_uint32_t *)arg) = wdg_timeout;
49         }
50         else
51         {
52             LOG_E("arg is NULL!");
53             return -RT_EIO;
54         }
55         break;
56     case RT_DEVICE_CTRL_WDT_GET_TIMELEFT:
57         LOG_E("not support RT_DEVICE_CTRL_WDT_GET_TIMELEFT on this platform!");
58         if (arg)
59         {
60             *((rt_uint32_t *)arg) = 0;
61         }
62         else
63         {
64             LOG_E("arg is NULL!");
65         }
66         return -RT_EIO;
67     case RT_DEVICE_CTRL_WDT_KEEPALIVE:
68         hal_watchdog_feed();
69         break;
70     case RT_DEVICE_CTRL_WDT_START:
71         hal_watchdog_start(wdg_timeout);
72         break;
73     case RT_DEVICE_CTRL_WDT_STOP:
74         hal_watchdog_stop(wdg_timeout);
75         break;
76     default:
77         return -RT_EIO;
78     }
79     return RT_EOK;
80 }
81 
82 static const struct rt_watchdog_ops wdg_pos =
83 {
84     wdg_init,
85     wdg_control,
86 };
87 
88 static rt_watchdog_t wdg;
89 
rt_hw_wdg_init(void)90 int rt_hw_wdg_init(void)
91 {
92     wdg.ops = &wdg_pos;
93     rt_hw_watchdog_register(&wdg, "wdt", 0, RT_NULL);
94     return RT_EOK;
95 }
96 
97 INIT_DEVICE_EXPORT(rt_hw_wdg_init);
98 
rt_hw_cpu_reset(void)99 void rt_hw_cpu_reset(void)
100 {
101     rt_hw_interrupt_disable();
102     hal_watchdog_start(1);
103     while(1);
104 }
105 MSH_CMD_EXPORT_ALIAS(rt_hw_cpu_reset, reboot, reset machine);
106 
107 #endif /* RT_USING_WDT && BSP_USING_WDT */
108