mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-11 07:34:31 +00:00
abbab70363
Use a common watchdog driver for all these cpus. Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com> Acked-by: Stefano Babic <sbabic@denx.de>
66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
/*
|
|
* watchdog.c - driver for i.mx on-chip watchdog
|
|
*
|
|
* Licensed under the GPL-2 or later.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
#include <watchdog.h>
|
|
#include <asm/arch/imx-regs.h>
|
|
|
|
struct watchdog_regs {
|
|
u16 wcr; /* Control */
|
|
u16 wsr; /* Service */
|
|
u16 wrsr; /* Reset Status */
|
|
};
|
|
|
|
#define WCR_WDZST 0x01
|
|
#define WCR_WDBG 0x02
|
|
#define WCR_WDE 0x04 /* WDOG enable */
|
|
#define WCR_WDT 0x08
|
|
#define WCR_WDW 0x80
|
|
#define SET_WCR_WT(x) (x << 8)
|
|
|
|
#ifdef CONFIG_IMX_WATCHDOG
|
|
void hw_watchdog_reset(void)
|
|
{
|
|
struct watchdog_regs *wdog = (struct watchdog_regs *)WDOG1_BASE_ADDR;
|
|
|
|
writew(0x5555, &wdog->wsr);
|
|
writew(0xaaaa, &wdog->wsr);
|
|
}
|
|
|
|
void hw_watchdog_init(void)
|
|
{
|
|
struct watchdog_regs *wdog = (struct watchdog_regs *)WDOG1_BASE_ADDR;
|
|
u16 timeout;
|
|
|
|
/*
|
|
* The timer watchdog can be set between
|
|
* 0.5 and 128 Seconds. If not defined
|
|
* in configuration file, sets 128 Seconds
|
|
*/
|
|
#ifndef CONFIG_WATCHDOG_TIMEOUT_MSECS
|
|
#define CONFIG_WATCHDOG_TIMEOUT_MSECS 128000
|
|
#endif
|
|
timeout = (CONFIG_WATCHDOG_TIMEOUT_MSECS / 500) - 1;
|
|
writew(WCR_WDZST | WCR_WDBG | WCR_WDE | WCR_WDT |
|
|
WCR_WDW | SET_WCR_WT(timeout), &wdog->wcr);
|
|
hw_watchdog_reset();
|
|
}
|
|
#endif
|
|
|
|
void reset_cpu(ulong addr)
|
|
{
|
|
struct watchdog_regs *wdog = (struct watchdog_regs *)WDOG1_BASE_ADDR;
|
|
|
|
writew(WCR_WDE, &wdog->wcr);
|
|
writew(0x5555, &wdog->wsr);
|
|
writew(0xaaaa, &wdog->wsr); /* load minimum 1/2 second timeout */
|
|
while (1) {
|
|
/*
|
|
* spin for .5 seconds before reset
|
|
*/
|
|
}
|
|
}
|