diff options
| author | Graeme Russ | 2010-04-24 00:05:58 +1000 |
|---|---|---|
| committer | Wolfgang Denk | 2010-05-06 00:20:04 +0200 |
| commit | 880c59e5add3681bd4dca14d2fd20152bee7ad14 (patch) | |
| tree | d75ea0db9107aab9398f3a40d65ac1de32896fbd /board/eNET | |
| parent | f2a55055e9b19f3eba9de97ff454cf8bfef25468 (diff) | |
eNET: Implement eNET Watchdog
Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
Diffstat (limited to 'board/eNET')
| -rw-r--r-- | board/eNET/eNET.c | 45 | ||||
| -rw-r--r-- | board/eNET/hardware.h | 1 |
2 files changed, 46 insertions, 0 deletions
diff --git a/board/eNET/eNET.c b/board/eNET/eNET.c index ad71f7e5dcb..7f0e2577f1b 100644 --- a/board/eNET/eNET.c +++ b/board/eNET/eNET.c @@ -45,6 +45,9 @@ DECLARE_GLOBAL_DATA_PTR; unsigned long monitor_flash_len = CONFIG_SYS_MONITOR_LEN; +static void enet_timer_isr(void); +static void enet_toggle_run_led(void); + void init_sc520_enet (void) { /* Set CPU Speed to 100MHz */ @@ -160,6 +163,10 @@ int last_stage_init(void) major = minor = 0; + outb(0x00, LED_LATCH_ADDRESS); + + register_timer_isr (enet_timer_isr); + printf("Serck Controls eNET\n"); return 0; @@ -218,3 +225,41 @@ void setup_pcat_compatibility() writeb(SC520_IRQ_DISABLED, &sc520_mmcr->wpvmap); writeb(SC520_IRQ_DISABLED, &sc520_mmcr->icemap); } + +void enet_timer_isr(void) +{ + static long enet_ticks = 0; + + enet_ticks++; + + /* Toggle Watchdog every 100ms */ + if ((enet_ticks % 100) == 0) + hw_watchdog_reset(); + + /* Toggle Run LED every 500ms */ + if ((enet_ticks % 500) == 0) + enet_toggle_run_led(); +} + +void hw_watchdog_reset(void) +{ + /* Watchdog Reset must be atomic */ + long flag = disable_interrupts(); + + if (sc520_mmcr->piodata15_0 & WATCHDOG_PIO_BIT) + sc520_mmcr->pioclr15_0 = WATCHDOG_PIO_BIT; + else + sc520_mmcr->pioset15_0 = WATCHDOG_PIO_BIT; + + if (flag) + enable_interrupts(); +} + +void enet_toggle_run_led(void) +{ + unsigned char leds_state= inb(LED_LATCH_ADDRESS); + if (leds_state & LED_RUN_BITMASK) + outb(leds_state &~ LED_RUN_BITMASK, LED_LATCH_ADDRESS); + else + outb(leds_state | LED_RUN_BITMASK, LED_LATCH_ADDRESS); +} diff --git a/board/eNET/hardware.h b/board/eNET/hardware.h index 42474a62fab..dec2cd80406 100644 --- a/board/eNET/hardware.h +++ b/board/eNET/hardware.h @@ -31,5 +31,6 @@ #define LED_RX_BITMASK 0x08 #define LED_TX_BITMASK 0x10 #define LED_ERR_BITMASK 0x20 +#define WATCHDOG_PIO_BIT 0x8000 #endif /* HARDWARE_H_ */ |