1 files changed, 72 insertions, 0 deletions
diff --git a/plat/gxb/watchdog.c b/plat/gxb/watchdog.c
new file mode 100644
index 0000000..e77e358
--- /dev/null
+++ b/plat/gxb/watchdog.c
@@ -0,0 +1,72 @@
+
+/*
+ * arch/arm/cpu/armv8/common/firmware/plat/gxb/watchdog.c
+ *
+ * Copyright (C) 2015 Amlogic, Inc. All rights reserved.
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+*/
+
+#include <stdint.h>
+#include <asm/arch/romboot.h>
+#include <asm/arch/watchdog.h>
+#include <io.h>
+#include <asm/arch/io.h>
+#include <timer.h>
+
+void watchdog_init(uint32_t msec)
+{
+	// src: 24MHz
+	// div: 24000 for 1ms
+	// reset ao-22 and ee-21
+	*P_WATCHDOG_CNTL = (1<<24)|(1<<25)|(1<<22)|(1<<21)|(24000-1);
+
+	// set timeout
+	*P_WATCHDOG_TCNT = msec;
+	*P_WATCHDOG_RESET = 0;
+
+	// enable
+	*P_WATCHDOG_CNTL |= (1<<18);
+}
+
+void watchdog_reset(void)
+{
+	*P_WATCHDOG_RESET = 0;
+}
+
+void watchdog_disable(void)
+{
+	// turn off internal counter and disable
+	*P_WATCHDOG_CNTL &= ~((1<<18)|(1<<25));
+}
+void reset_system(void)
+{
+	int i;
+	_udelay(10000); //wait print
+	while (1) {
+		writel( 0x3 | (1 << 21) // sys reset en
+					| (1 << 23) // interrupt en
+					| (1 << 24) // clk en
+					| (1 << 25) // clk div en
+					| (1 << 26) // sys reset now
+			, P_WATCHDOG_CNTL);
+		writel(0, P_WATCHDOG_RESET);
+
+		writel(readl(P_WATCHDOG_CNTL) | (1<<18), // watchdog en
+			P_WATCHDOG_CNTL);
+		for (i=0; i<100; i++)
+			readl(P_WATCHDOG_CNTL);/*Deceive gcc for waiting some cycles */
+	}
+}