diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/cpu/armv7/s5p-common/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/s5p-common/wdt.c | 59 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-exynos/watchdog.h | 6 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-s5pc1xx/cpu.h | 1 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-s5pc1xx/watchdog.h | 58 |
5 files changed, 124 insertions, 1 deletions
diff --git a/arch/arm/cpu/armv7/s5p-common/Makefile b/arch/arm/cpu/armv7/s5p-common/Makefile index 1705399..f975f3f 100644 --- a/arch/arm/cpu/armv7/s5p-common/Makefile +++ b/arch/arm/cpu/armv7/s5p-common/Makefile @@ -28,6 +28,7 @@ LIB = $(obj)libs5p-common.o COBJS-y += cpu_info.o COBJS-y += timer.o COBJS-y += sromc.o +COBJS-y += wdt.o COBJS-$(CONFIG_PWM) += pwm.o SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) diff --git a/arch/arm/cpu/armv7/s5p-common/wdt.c b/arch/arm/cpu/armv7/s5p-common/wdt.c new file mode 100644 index 0000000..94acc1e --- /dev/null +++ b/arch/arm/cpu/armv7/s5p-common/wdt.c @@ -0,0 +1,59 @@ +/* + * Copyright (C) 2012 Samsung Electronics + * Minkyu Kang <mk7.kang@samsung.com> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/watchdog.h> + +#define PRESCALER_VAL 255 + +void wdt_stop(void) +{ + struct s5p_watchdog *wdt = + (struct s5p_watchdog *)samsung_get_base_watchdog(); + unsigned int wtcon; + + wtcon = readl(&wdt->wtcon); + wtcon &= ~(WTCON_EN | WTCON_INT | WTCON_RESET); + + writel(wtcon, &wdt->wtcon); +} + +void wdt_start(unsigned int timeout) +{ + struct s5p_watchdog *wdt = + (struct s5p_watchdog *)samsung_get_base_watchdog(); + unsigned int wtcon; + + wdt_stop(); + + wtcon = readl(&wdt->wtcon); + wtcon |= (WTCON_EN | WTCON_CLK(WTCON_CLK_128)); + wtcon &= ~WTCON_INT; + wtcon |= WTCON_RESET; + wtcon |= WTCON_PRESCALER(PRESCALER_VAL); + + writel(timeout, &wdt->wtdat); + writel(timeout, &wdt->wtcnt); + writel(wtcon, &wdt->wtcon); +} diff --git a/arch/arm/include/asm/arch-exynos/watchdog.h b/arch/arm/include/asm/arch-exynos/watchdog.h index 3015875..ee0c9c9 100644 --- a/arch/arm/include/asm/arch-exynos/watchdog.h +++ b/arch/arm/include/asm/arch-exynos/watchdog.h @@ -42,12 +42,16 @@ #define WTCON_INT (0x1 << WTCON_INTEN_OFFSET) #ifndef __ASSEMBLY__ -struct exynos4_watchdog { +struct s5p_watchdog { unsigned int wtcon; unsigned int wtdat; unsigned int wtcnt; unsigned int wtclrint; }; + +/* functions */ +void wdt_stop(void); +void wdt_start(unsigned int timeout); #endif /* __ASSEMBLY__ */ #endif diff --git a/arch/arm/include/asm/arch-s5pc1xx/cpu.h b/arch/arm/include/asm/arch-s5pc1xx/cpu.h index e699fc4..510ead4 100644 --- a/arch/arm/include/asm/arch-s5pc1xx/cpu.h +++ b/arch/arm/include/asm/arch-s5pc1xx/cpu.h @@ -98,6 +98,7 @@ SAMSUNG_BASE(mmc, MMC_BASE) SAMSUNG_BASE(sromc, SROMC_BASE) SAMSUNG_BASE(timer, PWMTIMER_BASE) SAMSUNG_BASE(uart, UART_BASE) +SAMSUNG_BASE(watchdog, WATCHDOG_BASE) #endif #endif /* _S5PC1XX_CPU_H */ diff --git a/arch/arm/include/asm/arch-s5pc1xx/watchdog.h b/arch/arm/include/asm/arch-s5pc1xx/watchdog.h new file mode 100644 index 0000000..0f80ca5 --- /dev/null +++ b/arch/arm/include/asm/arch-s5pc1xx/watchdog.h @@ -0,0 +1,58 @@ +/* + * Copyright (C) 2011 Samsung Electronics + * Heungjun Kim <riverful.kim@samsung.com> + * Minkyu Kang <mk7.kang@samsung.com> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#ifndef __ASM_ARM_ARCH_WATCHDOG_H_ +#define __ASM_ARM_ARCH_WATCHDOG_H_ + +#define WTCON_RESET_OFFSET 0 +#define WTCON_INTEN_OFFSET 2 +#define WTCON_CLKSEL_OFFSET 3 +#define WTCON_EN_OFFSET 5 +#define WTCON_PRE_OFFSET 8 + +#define WTCON_CLK_16 0x0 +#define WTCON_CLK_32 0x1 +#define WTCON_CLK_64 0x2 +#define WTCON_CLK_128 0x3 + +#define WTCON_CLK(x) ((x & 0x3) << WTCON_CLKSEL_OFFSET) +#define WTCON_PRESCALER(x) ((x) << WTCON_PRE_OFFSET) +#define WTCON_EN (0x1 << WTCON_EN_OFFSET) +#define WTCON_RESET (0x1 << WTCON_RESET_OFFSET) +#define WTCON_INT (0x1 << WTCON_INTEN_OFFSET) + +#ifndef __ASSEMBLY__ +struct s5p_watchdog { + unsigned int wtcon; + unsigned int wtdat; + unsigned int wtcnt; + unsigned int wtclrint; +}; + +/* functions */ +void wdt_stop(void); +void wdt_start(unsigned int timeout); +#endif /* __ASSEMBLY__ */ + +#endif |