diff options
Diffstat (limited to 'arch/arm/cpu/arm926ejs/davinci/timer.c')
-rw-r--r-- | arch/arm/cpu/arm926ejs/davinci/timer.c | 46 |
1 files changed, 32 insertions, 14 deletions
diff --git a/arch/arm/cpu/arm926ejs/davinci/timer.c b/arch/arm/cpu/arm926ejs/davinci/timer.c index 8b1734c..c7bf7a5 100644 --- a/arch/arm/cpu/arm926ejs/davinci/timer.c +++ b/arch/arm/cpu/arm926ejs/davinci/timer.c @@ -39,23 +39,10 @@ #include <common.h> #include <asm/io.h> +#include <asm/arch/timer_defs.h> DECLARE_GLOBAL_DATA_PTR; -struct davinci_timer { - u_int32_t pid12; - u_int32_t emumgt; - u_int32_t na1; - u_int32_t na2; - u_int32_t tim12; - u_int32_t tim34; - u_int32_t prd12; - u_int32_t prd34; - u_int32_t tcr; - u_int32_t tgcr; - u_int32_t wdtcr; -}; - static struct davinci_timer * const timer = (struct davinci_timer *)CONFIG_SYS_TIMERBASE; @@ -121,3 +108,34 @@ ulong get_tbclk(void) { return CONFIG_SYS_HZ; } + +#ifdef CONFIG_HW_WATCHDOG +static struct davinci_timer * const wdttimer = + (struct davinci_timer *)CONFIG_SYS_WDTTIMERBASE; + +/* + * See prufw2.pdf for using Timer as a WDT + */ +void davinci_hw_watchdog_enable(void) +{ + writel(0x0, &wdttimer->tcr); + writel(0x0, &wdttimer->tgcr); + /* TIMMODE = 2h */ + writel(0x08 | 0x03 | ((TIM_CLK_DIV - 1) << 8), &wdttimer->tgcr); + writel(CONFIG_SYS_WDT_PERIOD_LOW, &wdttimer->prd12); + writel(CONFIG_SYS_WDT_PERIOD_HIGH, &wdttimer->prd34); + writel(2 << 22, &wdttimer->tcr); + writel(0x0, &wdttimer->tim12); + writel(0x0, &wdttimer->tim34); + /* set WDEN bit, WDKEY 0xa5c6 */ + writel(0xa5c64000, &wdttimer->wdtcr); + /* clear counter register */ + writel(0xda7e4000, &wdttimer->wdtcr); +} + +void davinci_hw_watchdog_reset(void) +{ + writel(0xa5c64000, &wdttimer->wdtcr); + writel(0xda7e4000, &wdttimer->wdtcr); +} +#endif |