avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

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