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authorSonic Zhang <sonic.zhang@analog.com>2013-04-07 18:02:37 +0800
committerSonic Zhang <sonic.zhang@analog.com>2013-05-13 16:30:26 +0800
commite9a389a18477c1c57a0b30e9ea8f4d38c6e26e63 (patch)
tree4e0c9e5c15d316a8e16c10c428e44e41bf58e1b5 /arch/blackfin/cpu
parent13262d4cdab79b6ee8d9c6089f84132a4c9372a4 (diff)
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blackfin: Move blackfin watchdog driver out of the blackfin arch folder.
- Enable hw_watchdog_init() in watchdog.h if CONFIG_HW_WATCHDOG is defined. - Move blackfin hw watchdog driver to the generic driver folder. - Call hw_watchdog_init() from blackfin board init code. - Reuse macro CONFIG_WATCHDOG_TIMEOUT_MSECS - Update README.watchdog accordingly Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Diffstat (limited to 'arch/blackfin/cpu')
-rw-r--r--arch/blackfin/cpu/Makefile1
-rw-r--r--arch/blackfin/cpu/initcode.c5
-rw-r--r--arch/blackfin/cpu/start.S26
-rw-r--r--arch/blackfin/cpu/watchdog.c23
4 files changed, 22 insertions, 33 deletions
diff --git a/arch/blackfin/cpu/Makefile b/arch/blackfin/cpu/Makefile
index 0a72ec5..145f63e 100644
--- a/arch/blackfin/cpu/Makefile
+++ b/arch/blackfin/cpu/Makefile
@@ -25,7 +25,6 @@ COBJS-y += os_log.o
COBJS-y += reset.o
COBJS-y += serial.o
COBJS-y += traps.o
-COBJS-$(CONFIG_HW_WATCHDOG) += watchdog.o
SRCS := $(SEXTRA:.o=.S) $(SOBJS:.o=.S) $(COBJS-y:.o=.c)
OBJS := $(addprefix $(obj),$(COBJS-y) $(SOBJS))
diff --git a/arch/blackfin/cpu/initcode.c b/arch/blackfin/cpu/initcode.c
index 8ef0b92..078209f 100644
--- a/arch/blackfin/cpu/initcode.c
+++ b/arch/blackfin/cpu/initcode.c
@@ -13,6 +13,7 @@
#include <config.h>
#include <asm/blackfin.h>
+#include <asm/mach-common/bits/watchdog.h>
#include <asm/mach-common/bits/bootrom.h>
#include <asm/mach-common/bits/core.h>
@@ -468,9 +469,11 @@ program_early_devices(ADI_BOOT_DATA *bs, uint *sdivB, uint *divB, uint *vcoB)
bfin_write_SEC_GCTL(0x1);
bfin_write_SEC_CCTL(0x1);
#endif
+ bfin_write_WDOG_CTL(WDDIS);
+ SSYNC();
bfin_write_WDOG_CNT(MSEC_TO_SCLK(CONFIG_HW_WATCHDOG_TIMEOUT_INITCODE));
#if CONFIG_BFIN_BOOT_MODE != BFIN_BOOT_UART
- bfin_write_WDOG_CTL(0);
+ bfin_write_WDOG_CTL(WDEN);
#endif
serial_putc('f');
}
diff --git a/arch/blackfin/cpu/start.S b/arch/blackfin/cpu/start.S
index 7155fc8..1c6ae35 100644
--- a/arch/blackfin/cpu/start.S
+++ b/arch/blackfin/cpu/start.S
@@ -32,6 +32,7 @@
#include <config.h>
#include <asm/blackfin.h>
+#include <asm/mach-common/bits/watchdog.h>
#include <asm/mach-common/bits/core.h>
#include <asm/mach-common/bits/pll.h>
@@ -65,20 +66,29 @@ ENTRY(_start)
p5.h = HI(COREMMR_BASE);
#ifdef CONFIG_HW_WATCHDOG
-#ifndef __ADSPBF60x__
-# ifndef CONFIG_HW_WATCHDOG_TIMEOUT_START
-# define CONFIG_HW_WATCHDOG_TIMEOUT_START 5000
-# endif
- /* Program the watchdog with an initial timeout of ~5 seconds.
+ /* Program the watchdog with default timeout of ~5 seconds.
* That should be long enough to bootstrap ourselves up and
* then the common u-boot code can take over.
*/
+ r1 = WDDIS;
+# ifdef __ADSPBF60x__
+ [p4 + (WDOG_CTL - SYSMMR_BASE)] = r1;
+# else
+ W[p4 + (WDOG_CTL - SYSMMR_BASE)] = r1;
+# endif
+ SSYNC;
r0 = 0;
- r0.h = HI(MSEC_TO_SCLK(CONFIG_HW_WATCHDOG_TIMEOUT_START));
+ r0.h = HI(MSEC_TO_SCLK(CONFIG_WATCHDOG_TIMEOUT_MSECS));
[p4 + (WDOG_CNT - SYSMMR_BASE)] = r0;
+ SSYNC;
+ r1 = WDEN;
/* fire up the watchdog - R0.L above needs to be 0x0000 */
- W[p4 + (WDOG_CTL - SYSMMR_BASE)] = r0;
-#endif
+# ifdef __ADSPBF60x__
+ [p4 + (WDOG_CTL - SYSMMR_BASE)] = r1;
+# else
+ W[p4 + (WDOG_CTL - SYSMMR_BASE)] = r1;
+# endif
+ SSYNC;
#endif
/* Turn on the serial for debugging the init process */
diff --git a/arch/blackfin/cpu/watchdog.c b/arch/blackfin/cpu/watchdog.c
deleted file mode 100644
index 1886bda..0000000
--- a/arch/blackfin/cpu/watchdog.c
+++ /dev/null
@@ -1,23 +0,0 @@
-/*
- * watchdog.c - driver for Blackfin on-chip watchdog
- *
- * Copyright (c) 2007-2009 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
- */
-
-#include <common.h>
-#include <watchdog.h>
-#include <asm/blackfin.h>
-
-void hw_watchdog_reset(void)
-{
- bfin_write_WDOG_STAT(0);
-}
-
-void hw_watchdog_init(void)
-{
- bfin_write_WDOG_CNT(5 * get_sclk()); /* 5 second timeout */
- hw_watchdog_reset();
- bfin_write_WDOG_CTL(0x0);
-}