From 3473ab737282b08ad61841fcbb14c4d264a93a8e Mon Sep 17 00:00:00 2001
From: Jason Jin <Jason.jin@freescale.com>
Date: Tue, 13 May 2008 11:50:36 +0800
Subject: [PATCH] Feed the watchdog in u-boot for 8610 board.
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 | 16 +++++++++++++++-
include/configs/MPC8610HPCD.h | 3 ++-
4 files changed, 32 insertions(+), 2 deletions(-)
diff --git a/cpu/mpc86xx/cpu.c b/cpu/mpc86xx/cpu.c
index e26bf3671d..4a9905d685 100644
--- a/cpu/mpc86xx/cpu.c
+++ b/cpu/mpc86xx/cpu.c
@@ -214,6 +214,20 @@ 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 d9f634fdab..f16744bfdc 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 c03b4b8157..03a25c7944 100644
--- a/include/asm-ppc/immap_86xx.h
+++ b/include/asm-ppc/immap_86xx.h
@@ -1304,9 +1304,21 @@ 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 +1342,8 @@ 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 fc168909e7..98ae34c3bf 100644
--- a/include/configs/MPC8610HPCD.h
+++ b/include/configs/MPC8610HPCD.h
@@ -485,7 +485,8 @@
#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*/
--
2.39.5