mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-06 05:04:26 +00:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2016 Freescale Semiconductor, Inc.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/imx-regs.h>
|
|
|
|
/*
|
|
* MX7ULP WDOG Register Map
|
|
*/
|
|
struct wdog_regs {
|
|
u8 cs1;
|
|
u8 cs2;
|
|
u16 reserve0;
|
|
u32 cnt;
|
|
u32 toval;
|
|
u32 win;
|
|
};
|
|
|
|
#ifndef CONFIG_WATCHDOG_TIMEOUT_MSECS
|
|
#define CONFIG_WATCHDOG_TIMEOUT_MSECS 0x1500
|
|
#endif
|
|
|
|
#define REFRESH_WORD0 0xA602 /* 1st refresh word */
|
|
#define REFRESH_WORD1 0xB480 /* 2nd refresh word */
|
|
|
|
#define UNLOCK_WORD0 0xC520 /* 1st unlock word */
|
|
#define UNLOCK_WORD1 0xD928 /* 2nd unlock word */
|
|
|
|
#define WDGCS1_WDGE (1<<7)
|
|
#define WDGCS1_WDGUPDATE (1<<5)
|
|
|
|
#define WDGCS2_FLG (1<<6)
|
|
|
|
#define WDG_BUS_CLK (0x0)
|
|
#define WDG_LPO_CLK (0x1)
|
|
#define WDG_32KHZ_CLK (0x2)
|
|
#define WDG_EXT_CLK (0x3)
|
|
|
|
void hw_watchdog_set_timeout(u16 val)
|
|
{
|
|
/* setting timeout value */
|
|
struct wdog_regs *wdog = (struct wdog_regs *)WDOG_BASE_ADDR;
|
|
|
|
writel(val, &wdog->toval);
|
|
}
|
|
|
|
void hw_watchdog_reset(void)
|
|
{
|
|
struct wdog_regs *wdog = (struct wdog_regs *)WDOG_BASE_ADDR;
|
|
|
|
writel(REFRESH_WORD0, &wdog->cnt);
|
|
writel(REFRESH_WORD1, &wdog->cnt);
|
|
}
|
|
|
|
void hw_watchdog_init(void)
|
|
{
|
|
u8 val;
|
|
struct wdog_regs *wdog = (struct wdog_regs *)WDOG_BASE_ADDR;
|
|
|
|
writel(UNLOCK_WORD0, &wdog->cnt);
|
|
writel(UNLOCK_WORD1, &wdog->cnt);
|
|
|
|
val = readb(&wdog->cs2);
|
|
val |= WDGCS2_FLG;
|
|
writeb(val, &wdog->cs2);
|
|
|
|
hw_watchdog_set_timeout(CONFIG_WATCHDOG_TIMEOUT_MSECS);
|
|
writel(0, &wdog->win);
|
|
|
|
writeb(WDG_LPO_CLK, &wdog->cs2);/* setting 1-kHz clock source */
|
|
writeb((WDGCS1_WDGE | WDGCS1_WDGUPDATE), &wdog->cs1);/* enable counter running */
|
|
|
|
hw_watchdog_reset();
|
|
}
|
|
|
|
void reset_cpu(ulong addr)
|
|
{
|
|
struct wdog_regs *wdog = (struct wdog_regs *)WDOG_BASE_ADDR;
|
|
|
|
writel(UNLOCK_WORD0, &wdog->cnt);
|
|
writel(UNLOCK_WORD1, &wdog->cnt);
|
|
|
|
hw_watchdog_set_timeout(5); /* 5ms timeout */
|
|
writel(0, &wdog->win);
|
|
|
|
writeb(WDG_LPO_CLK, &wdog->cs2);/* setting 1-kHz clock source */
|
|
writeb(WDGCS1_WDGE, &wdog->cs1);/* enable counter running */
|
|
|
|
hw_watchdog_reset();
|
|
|
|
while (1);
|
|
}
|