1 /*
2 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
3 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this list of
9 * conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
12 * of conditions and the following disclaimer in the documentation and/or other materials
13 * provided with the distribution.
14 *
15 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
16 * to endorse or promote products derived from this software without specific prior written
17 * permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include "hal_watchdog.h"
33
WdtEnable(VOID)34 VOID WdtEnable(VOID)
35 {
36 if (REG32_READ(RTC_WDT_CFG0) & (1 << RTC_CNTL_WDT_EN)) {
37 return;
38 }
39
40 if (REG32_READ(RTC_WDT_PROTECT) != WDT_WRITE_MASK) {
41 REG32_WRITE(RTC_WDT_PROTECT, WDT_WRITE_MASK);
42 }
43
44 REG32_WRITE(RTC_WDT_FEED, (1 << RTC_CNTL_WDT_FEED));
45 REG32_WRITE(RTC_WDT_CFG0, (RTC_CNTL_WDT_SYS_RESET << RTC_CNTL_WDT_STG0));
46 REG32_WRITE(RTC_WDT_CFG0, (RTC_CNTL_WDT_SYS_RESET_MASK << RTC_CNTL_WDT_SYS_RESET_LENGTH));
47 REG32_WRITE(RTC_WDT_CFG0, (1 << RTC_CNTL_WDT_FLASHBOOT_MOD_EN));
48 REG32_WRITE(RTC_WDT_CFG0, (1 << RTC_CNTL_WDT_FLASHBOOT_MOD_EN));
49 REG32_WRITE(RTC_WDT_CFG0, (1 << RTC_CNTL_WDT_EN));
50 REG32_WRITE(RTC_WDT_PROTECT, 0);
51 }
52
WdtDisable(VOID)53 VOID WdtDisable(VOID)
54 {
55 if (REG32_READ(RTC_WDT_PROTECT) != WDT_WRITE_MASK) {
56 REG32_WRITE(RTC_WDT_PROTECT, WDT_WRITE_MASK);
57 }
58 REG32_WRITE(RTC_WDT_FEED, (1 << RTC_CNTL_WDT_FEED));
59 REG32_WRITE(RTC_WDT_CFG0, (0 << RTC_CNTL_WDT_STG0));
60 REG32_WRITE(RTC_WDT_CFG0, ~(1 << RTC_CNTL_WDT_FLASHBOOT_MOD_EN));
61 REG32_WRITE(RTC_WDT_CFG0, ~(1 << RTC_CNTL_WDT_FLASHBOOT_MOD_EN));
62 REG32_WRITE(RTC_WDT_CFG0, ~(1 << RTC_CNTL_WDT_EN));
63 REG32_WRITE(RTC_WDT_PROTECT, 0);
64 }
65
WdtFeed(VOID)66 VOID WdtFeed(VOID)
67 {
68 if (REG32_READ(RTC_WDT_PROTECT) != WDT_WRITE_MASK) {
69 REG32_WRITE(RTC_WDT_PROTECT, WDT_WRITE_MASK);
70 }
71 REG32_WRITE(RTC_WDT_FEED, (1 << RTC_CNTL_WDT_FEED));
72 REG32_WRITE(RTC_WDT_PROTECT, 0);
73 }
74
IoTWatchDogEnable(void)75 void IoTWatchDogEnable(void)
76 {
77 WdtEnable();
78 }
79
IoTWatchDogKick(void)80 void IoTWatchDogKick(void)
81 {
82 WdtFeed();
83 }
84
IoTWatchDogDisable(void)85 void IoTWatchDogDisable(void)
86 {
87 WdtDisable();
88 }
89