From e9a389a18477c1c57a0b30e9ea8f4d38c6e26e63 Mon Sep 17 00:00:00 2001 From: Sonic Zhang Date: Sun, 7 Apr 2013 18:02:37 +0800 Subject: 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 --- arch/blackfin/cpu/Makefile | 1 - arch/blackfin/cpu/initcode.c | 5 ++++- arch/blackfin/cpu/start.S | 26 ++++++++++++++++++-------- arch/blackfin/cpu/watchdog.c | 23 ----------------------- arch/blackfin/lib/board.c | 4 ++-- doc/README.watchdog | 3 +++ drivers/watchdog/Makefile | 1 + drivers/watchdog/bfin_wdt.c | 26 ++++++++++++++++++++++++++ include/configs/bfin_adi_common.h | 6 ++++++ include/watchdog.h | 3 +-- 10 files changed, 61 insertions(+), 37 deletions(-) delete mode 100644 arch/blackfin/cpu/watchdog.c create mode 100644 drivers/watchdog/bfin_wdt.c 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 #include +#include #include #include @@ -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 #include +#include #include #include @@ -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 -#include -#include - -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); -} diff --git a/arch/blackfin/lib/board.c b/arch/blackfin/lib/board.c index 85b859d..f1d5547 100644 --- a/arch/blackfin/lib/board.c +++ b/arch/blackfin/lib/board.c @@ -279,9 +279,9 @@ void board_init_f(ulong bootflag) dcache_enable(); #endif -#ifdef CONFIG_WATCHDOG +#ifdef CONFIG_HW_WATCHDOG serial_early_puts("Setting up external watchdog\n"); - watchdog_init(); + hw_watchdog_init(); #endif #ifdef DEBUG diff --git a/doc/README.watchdog b/doc/README.watchdog index 33f31c2..59f306b 100644 --- a/doc/README.watchdog +++ b/doc/README.watchdog @@ -30,3 +30,6 @@ CONFIG_IMX_WATCHDOG CONFIG_XILINX_TB_WATCHDOG Available for Xilinx Axi platforms to service timebase watchdog timer. + +CONFIG_BFIN_WATCHDOG + Available for bf5xx and bf6xx to service the watchdog. diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile index 13e7c37..d57578d 100644 --- a/drivers/watchdog/Makefile +++ b/drivers/watchdog/Makefile @@ -33,6 +33,7 @@ endif COBJS-$(CONFIG_TNETV107X_WATCHDOG) += tnetv107x_wdt.o COBJS-$(CONFIG_S5P) += s5p_wdt.o COBJS-$(CONFIG_XILINX_TB_WATCHDOG) += xilinx_tb_wdt.o +COBJS-$(CONFIG_BFIN_WATCHDOG) += bfin_wdt.o COBJS := $(COBJS-y) SRCS := $(COBJS:.o=.c) diff --git a/drivers/watchdog/bfin_wdt.c b/drivers/watchdog/bfin_wdt.c new file mode 100644 index 0000000..7a6756b --- /dev/null +++ b/drivers/watchdog/bfin_wdt.c @@ -0,0 +1,26 @@ +/* + * watchdog.c - driver for Blackfin on-chip watchdog + * + * Copyright (c) 2007-2009 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#include +#include +#include +#include + +void hw_watchdog_reset(void) +{ + bfin_write_WDOG_STAT(0); +} + +void hw_watchdog_init(void) +{ + bfin_write_WDOG_CTL(WDDIS); + SSYNC(); + bfin_write_WDOG_CNT(CONFIG_WATCHDOG_TIMEOUT_MSECS / 1000 * get_sclk()); + hw_watchdog_reset(); + bfin_write_WDOG_CTL(WDEN); +} diff --git a/include/configs/bfin_adi_common.h b/include/configs/bfin_adi_common.h index c986ba3..0bcccf8 100644 --- a/include/configs/bfin_adi_common.h +++ b/include/configs/bfin_adi_common.h @@ -314,5 +314,11 @@ #define CONFIG_BFIN_SPI_GPIO_CS /* Only matters if BFIN_SPI is enabled */ #define CONFIG_LZMA #define CONFIG_MONITOR_IS_IN_RAM +#ifdef CONFIG_HW_WATCHDOG +# define CONFIG_BFIN_WATCHDOG +# ifndef CONFIG_WATCHDOG_TIMEOUT_MSECS +# define CONFIG_WATCHDOG_TIMEOUT_MSECS 5000 +# endif +#endif #endif diff --git a/include/watchdog.h b/include/watchdog.h index 97ec186..d95e4b1 100644 --- a/include/watchdog.h +++ b/include/watchdog.h @@ -108,8 +108,7 @@ int init_func_watchdog_reset(void); void reset_4xx_watchdog(void); #endif -/* Freescale i.MX */ -#if defined(CONFIG_IMX_WATCHDOG) && !defined(__ASSEMBLY__) +#if defined(CONFIG_HW_WATCHDOG) && !defined(__ASSEMBLY__) void hw_watchdog_init(void); #endif #endif /* _WATCHDOG_H_ */ -- cgit v1.1