The watchdog on 8610 board is enabled by setting sw[6] to on. Once enabled, the watchdog can not be disabled by software. So feed the dog in u-boot is necessary for normal operation.
Signed-off-by: Jason Jin Jason.jin@freescale.com --- cpu/mpc86xx/cpu.c | 14 ++++++++++++++ cpu/mpc86xx/interrupts.c | 1 + include/asm-ppc/immap_86xx.h | 14 +++++++++++++- include/configs/MPC8610HPCD.h | 3 ++- 4 files changed, 30 insertions(+), 2 deletions(-)
diff --git a/cpu/mpc86xx/cpu.c b/cpu/mpc86xx/cpu.c index bf4e651..6dd0655 100644 --- a/cpu/mpc86xx/cpu.c +++ b/cpu/mpc86xx/cpu.c @@ -213,6 +213,20 @@ get_tbclk(void) void watchdog_reset(void) { + +#if defined(CONFIG_MPC8610) +/*This actually feed the hard enabled watchdog*/ + volatile immap_t *immap = (immap_t *)CFG_IMMR; + volatile ccsr_wdt_t *wdt = &immap->im_wdt; + volatile ccsr_gur_t *gur = &immap->im_gur; + u32 tmp = gur->pordevsr; + + if(tmp & 0x4000) { + wdt->swsrr = 0x556c; + wdt->swsrr = 0xaa39; + } +#endif + } #endif /* CONFIG_WATCHDOG */
diff --git a/cpu/mpc86xx/interrupts.c b/cpu/mpc86xx/interrupts.c index d9f634f..f16744b 100644 --- a/cpu/mpc86xx/interrupts.c +++ b/cpu/mpc86xx/interrupts.c @@ -36,6 +36,7 @@ #include <command.h> #include <asm/processor.h> #include <ppc_asm.tmpl> +#include <watchdog.h>
unsigned long decrementer_count; /* count value for 1e6/HZ microseconds */ unsigned long timestamp; diff --git a/include/asm-ppc/immap_86xx.h b/include/asm-ppc/immap_86xx.h index 7526061..93a4eb7 100644 --- a/include/asm-ppc/immap_86xx.h +++ b/include/asm-ppc/immap_86xx.h @@ -1304,9 +1304,19 @@ typedef struct ccsr_gur { uint lynxdcr1; /* 0xe0f08 - Lynx debug control register 1*/ int res14[6]; uint ddrioovcr; /* 0xe0f24 - DDR IO Overdrive Control register */ - char res15[61656]; + char res15[216]; } ccsr_gur_t;
+/*Watchdog register block(0xe_4000-0xe_4fff)*/ +typedef struct ccsr_wdt { + uint res0; + uint swcrr; /* System watchdog control register */ + uint swcnr; /* System watchdog count register */ + char res1[2]; + ushort swsrr; /* System watchdog service register */ + char res2[4080]; +}ccsr_wdt_t; + typedef struct immap { ccsr_local_mcm_t im_local_mcm; ccsr_ddr_t im_ddr1; @@ -1330,6 +1340,8 @@ typedef struct immap { char res5[389120]; ccsr_rio_t im_rio; ccsr_gur_t im_gur; + char res6[12288]; + ccsr_wdt_t im_wdt; } immap_t;
extern immap_t *immr; diff --git a/include/configs/MPC8610HPCD.h b/include/configs/MPC8610HPCD.h index 53d6955..4d61a61 100644 --- a/include/configs/MPC8610HPCD.h +++ b/include/configs/MPC8610HPCD.h @@ -486,7 +486,8 @@ #endif
-#undef CONFIG_WATCHDOG /* watchdog disabled */ +#define CONFIG_WATCHDOG /* watchdog enabled */ +#define CFG_WATCHDOG_FREQ 5000 /*Feed interval, 5s*/
/*DIU Configuration*/ #define DIU_CONNECT_TO_DVI /* DIU controller connects to DVI encoder*/