1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/* Copyright 2019 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* MAX32660 Watchdog Module */
#include "clock.h"
#include "common.h"
#include "config.h"
#include "console.h"
#include "gpio.h"
#include "hooks.h"
#include "registers.h"
#include "task.h"
#include "util.h"
#include "watchdog.h"
#include "wdt_regs.h"
#define CPUTS(outstr) cputs(CC_COMMAND, outstr)
#define CPRINTS(format, args...) cprints(CC_COMMAND, format, ##args)
/* For a System clock of 96MHz,
* Time in seconds = 96000000 / 2 * 2^power
* Example for MXC_S_WDT_CTRL_INT_PERIOD_WDT2POW29
* Time in seconds = 96000000 / 2 * 2^29
* = 11.1 Seconds
*/
#define WATCHDOG_TIMER_PERIOD MXC_S_WDT_CTRL_INT_PERIOD_WDT2POW29
volatile int starve_dog = 0;
void watchdog_reload(void)
{
if (!starve_dog) {
/* Reset the watchdog */
MXC_WDT0->rst = 0x00A5;
MXC_WDT0->rst = 0x005A;
}
}
DECLARE_HOOK(HOOK_TICK, watchdog_reload, HOOK_PRIO_DEFAULT);
int watchdog_init(void)
{
/* Set the Watchdog period */
MXC_SETFIELD(MXC_WDT0->ctrl, MXC_F_WDT_CTRL_RST_PERIOD,
(WATCHDOG_TIMER_PERIOD << 4));
/* We want the WD to reset us if it is not fed in time. */
MXC_WDT0->ctrl |= MXC_F_WDT_CTRL_RST_EN;
/* Enable the watchdog */
MXC_WDT0->ctrl |= MXC_F_WDT_CTRL_WDT_EN;
/* Reset the watchdog */
MXC_WDT0->rst = 0x00A5;
MXC_WDT0->rst = 0x005A;
return EC_SUCCESS;
}
static int command_watchdog_test(int argc, const char **argv)
{
starve_dog = 1;
CPRINTS("done command_watchdog_test.");
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(wdttest, command_watchdog_test, "wdttest",
"Force a WDT reset.");
|
