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| author | Detlev Zundel <dzu@denx.de> | 2010-01-20 14:28:48 +0100 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2010-01-25 23:57:39 +0100 |
| commit | a21fb981d533ac6d323a01c7fa2cda20f2d36de5 (patch) | |
| tree | 92830d96379035e980bb181f7b74fea91b0e15e4 /cpu | |
| parent | 82826d5422331e9c99e5408dcf0348c8e0c257a6 (diff) | |
| download | u-boot-imx-a21fb981d533ac6d323a01c7fa2cda20f2d36de5.zip u-boot-imx-a21fb981d533ac6d323a01c7fa2cda20f2d36de5.tar.gz u-boot-imx-a21fb981d533ac6d323a01c7fa2cda20f2d36de5.tar.bz2 | |
mpc5xxx: Support CPU internal watchdog.
Signed-off-by: Detlev Zundel <dzu@denx.de>
Diffstat (limited to 'cpu')
| -rw-r--r-- | cpu/mpc5xxx/cpu.c | 20 | ||||
| -rw-r--r-- | cpu/mpc5xxx/cpu_init.c | 14 |
2 files changed, 32 insertions, 2 deletions
diff --git a/cpu/mpc5xxx/cpu.c b/cpu/mpc5xxx/cpu.c index 2a28df4..edfb828 100644 --- a/cpu/mpc5xxx/cpu.c +++ b/cpu/mpc5xxx/cpu.c @@ -1,5 +1,5 @@ /* - * (C) Copyright 2000-2003 + * (C) Copyright 2000-2010 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * See file CREDITS for list of people who contributed to this @@ -192,3 +192,21 @@ int cpu_eth_init(bd_t *bis) return mpc5xxx_fec_initialize(bis); } #endif + +#if defined(CONFIG_WATCHDOG) +void watchdog_reset(void) +{ + int re_enable = disable_interrupts(); + reset_5xxx_watchdog(); + if (re_enable) enable_interrupts(); +} + +void reset_5xxx_watchdog(void) +{ + volatile struct mpc5xxx_gpt *gpt0 = + (struct mpc5xxx_gpt *) MPC5XXX_GPT; + + /* Trigger TIMER_0 by writing A5 to OCPW */ + clrsetbits_be32(&gpt0->emsr, 0xff000000, 0xa5000000); +} +#endif /* CONFIG_WATCHDOG */ diff --git a/cpu/mpc5xxx/cpu_init.c b/cpu/mpc5xxx/cpu_init.c index acff5f5..b151464 100644 --- a/cpu/mpc5xxx/cpu_init.c +++ b/cpu/mpc5xxx/cpu_init.c @@ -1,5 +1,5 @@ /* - * (C) Copyright 2000-2009 + * (C) Copyright 2000-2010 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * See file CREDITS for list of people who contributed to this @@ -24,6 +24,7 @@ #include <common.h> #include <mpc5xxx.h> #include <asm/io.h> +#include <watchdog.h> DECLARE_GLOBAL_DATA_PTR; @@ -45,6 +46,8 @@ void cpu_init_f (void) (struct mpc5xxx_gpio *) MPC5XXX_GPIO; volatile struct mpc5xxx_xlb *xlb = (struct mpc5xxx_xlb *) MPC5XXX_XLBARB; + volatile struct mpc5xxx_gpt *gpt0 = + (struct mpc5xxx_gpt *) MPC5XXX_GPT; unsigned long addecr = (1 << 25); /* Boot_CS */ #if defined(CONFIG_SYS_RAMBOOT) && defined(CONFIG_MGT5100) addecr |= (1 << 22); /* SDRAM enable */ @@ -206,6 +209,15 @@ void cpu_init_f (void) /* Enable piplining */ clrbits_be32(&xlb->config, (1 << 31)); # endif + +#if defined(CONFIG_WATCHDOG) + /* Charge the watchdog timer - prescaler = 64k, count = 64k*/ + out_be32(&gpt0->cir, 0x0000ffff); + out_be32(&gpt0->emsr, 0x9004); /* wden|ce|timer_ms */ + + reset_5xxx_watchdog(); +#endif /* CONFIG_WATCHDOG */ + #endif /* CONFIG_MPC5200 */ } |