Commit a21fb981 authored by Detlev Zundel's avatar Detlev Zundel Committed by Wolfgang Denk
Browse files

mpc5xxx: Support CPU internal watchdog.


Signed-off-by: default avatarDetlev Zundel <dzu@denx.de>
parent 82826d54
/*
* (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 */
/*
* (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 */
}
......
......@@ -84,6 +84,11 @@
void reset_5xx_watchdog(volatile immap_t *immr);
#endif
/* MPC 5xxx */
#if defined(CONFIG_MPC5xxx) && !defined(__ASSEMBLY__)
void reset_5xxx_watchdog(void);
#endif
/* AMCC 4xx */
#if defined(CONFIG_4xx) && !defined(__ASSEMBLY__)
void reset_4xx_watchdog(void);
......
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