From 4a065abf926f128beb36d93449defa0d690e7fef Mon Sep 17 00:00:00 2001 From: Nobuhiro Iwamatsu Date: Thu, 18 Sep 2008 19:04:26 +0900 Subject: sh: Add support watchdog for SH4A core Add support watchdog for SH4A core (SH7763, SH7780 and SH7785). And fix some compile warning. Signed-off-by: Nobuhiro Iwamatsu --- cpu/sh4/watchdog.c | 53 +++++++++++++++++++++++++++++++++++++---------------- 1 file changed, 37 insertions(+), 16 deletions(-) (limited to 'cpu/sh4') diff --git a/cpu/sh4/watchdog.c b/cpu/sh4/watchdog.c index 346e217..f692429 100644 --- a/cpu/sh4/watchdog.c +++ b/cpu/sh4/watchdog.c @@ -17,34 +17,55 @@ #include #include +#include #define WDT_BASE WTCNT -static unsigned char cnt_read (void){ - return *((volatile unsigned char *)(WDT_BASE + 0x00)); +#define WDT_WD (1 << 6) +#define WDT_RST_P (0) +#define WDT_RST_M (1 << 5) +#define WDT_ENABLE (1 << 7) + +#if defined(CONFIG_WATCHDOG) +static unsigned char csr_read(void) +{ + return inb(WDT_BASE + 0x04); } -static unsigned char csr_read (void){ - return *((volatile unsigned char *)(WDT_BASE + 0x04)); +static void cnt_write(unsigned char value) +{ + outl((unsigned short)value | 0x5A00, WDT_BASE + 0x00); } -static void cnt_write (unsigned char value){ - while (csr_read() & (1 << 5)) { - /* delay */ - } - *((volatile unsigned short *)(WDT_BASE + 0x00)) - = ((unsigned short) value) | 0x5A00; +static void csr_write(unsigned char value) +{ + outl((unsigned short)value | 0xA500, WDT_BASE + 0x04); } -static void csr_write (unsigned char value){ - *((volatile unsigned short *)(WDT_BASE + 0x04)) - = ((unsigned short) value) | 0xA500; +void watchdog_reset(void) +{ + outl(0x55000000, WDT_BASE + 0x08); } +int watchdog_init(void) +{ + /* Set overflow time*/ + cnt_write(0); + /* Power on reset */ + csr_write(WDT_WD|WDT_RST_P|WDT_ENABLE); + + return 0; +} -int watchdog_init (void){ return 0; } +int watchdog_disable(void) +{ + csr_write(csr_read() & ~WDT_ENABLE); + return 0; +} +#endif -void reset_cpu (unsigned long ignored) +void reset_cpu(unsigned long ignored) { - while(1); + while (1) + ; } -- cgit v1.1