diff options
Diffstat (limited to 'qemu/roms/u-boot/drivers/watchdog/ftwdt010_wdt.c')
-rw-r--r-- | qemu/roms/u-boot/drivers/watchdog/ftwdt010_wdt.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/qemu/roms/u-boot/drivers/watchdog/ftwdt010_wdt.c b/qemu/roms/u-boot/drivers/watchdog/ftwdt010_wdt.c new file mode 100644 index 000000000..11f58f529 --- /dev/null +++ b/qemu/roms/u-boot/drivers/watchdog/ftwdt010_wdt.c @@ -0,0 +1,92 @@ +/* + * Watchdog driver for the FTWDT010 Watch Dog Driver + * + * (c) Copyright 2004 Faraday Technology Corp. (www.faraday-tech.com) + * Based on sa1100_wdt.c by Oleg Drokin <green@crimea.edu> + * Based on SoftDog driver by Alan Cox <alan@redhat.com> + * + * Copyright (C) 2011 Andes Technology Corporation + * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com> + * + * SPDX-License-Identifier: GPL-2.0+ + * + * 27/11/2004 Initial release, Faraday. + * 12/01/2011 Port to u-boot, Macpaul Lin. + */ + +#include <common.h> +#include <watchdog.h> +#include <asm/io.h> +#include <faraday/ftwdt010_wdt.h> + +/* + * Set the watchdog time interval. + * Counter is 32 bit. + */ +int ftwdt010_wdt_settimeout(unsigned int timeout) +{ + unsigned int reg; + + struct ftwdt010_wdt *wd = (struct ftwdt010_wdt *)CONFIG_FTWDT010_BASE; + + debug("Activating WDT..\n"); + + /* Check if disabled */ + if (readl(&wd->wdcr) & ~FTWDT010_WDCR_ENABLE) { + printf("sorry, watchdog is disabled\n"); + return -1; + } + + /* + * In a 66MHz system, + * if you set WDLOAD as 0x03EF1480 (66000000) + * the reset timer is 1 second. + */ + reg = FTWDT010_WDLOAD(timeout * FTWDT010_TIMEOUT_FACTOR); + + writel(reg, &wd->wdload); + + return 0; +} + +void ftwdt010_wdt_reset(void) +{ + struct ftwdt010_wdt *wd = (struct ftwdt010_wdt *)CONFIG_FTWDT010_BASE; + + /* clear control register */ + writel(0, &wd->wdcr); + + /* Write Magic number */ + writel(FTWDT010_WDRESTART_MAGIC, &wd->wdrestart); + + /* Enable WDT */ + writel((FTWDT010_WDCR_RST | FTWDT010_WDCR_ENABLE), &wd->wdcr); +} + +void ftwdt010_wdt_disable(void) +{ + struct ftwdt010_wdt *wd = (struct ftwdt010_wdt *)CONFIG_FTWDT010_BASE; + + debug("Deactivating WDT..\n"); + + /* + * It was defined with CONFIG_WATCHDOG_NOWAYOUT in Linux + * + * Shut off the timer. + * Lock it in if it's a module and we defined ...NOWAYOUT + */ + writel(0, &wd->wdcr); +} + +#if defined(CONFIG_HW_WATCHDOG) +void hw_watchdog_reset(void) +{ + ftwdt010_wdt_reset(); +} + +void hw_watchdog_init(void) +{ + /* set timer in ms */ + ftwdt010_wdt_settimeout(CONFIG_FTWDT010_HW_TIMEOUT * 1000); +} +#endif |