mediatek/mt8183: Add watchdog timer support

Using common watchdog timer (WDT) code for reset. Set up watchdog timer
in mtk_wdt_init() to get reset status and disable auto-reboot. Link
common do_hard_reset() to support hard reset.

BUG=b:80501386
BRANCH=none
TEST=both mtk_wdt_init() and do_hard_reset() work on Kukui.

Change-Id: I4be3a133dbb8a64604133cefb0c5f02d01afd0d4
Signed-off-by: Tristan Shieh <tristan.shieh@mediatek.com>
Reviewed-on: https://review.coreboot.org/27026
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/mediatek/mt8183/Makefile.inc

@@ -1,27 +1,32 @@
 ifeq ($(CONFIG_SOC_MEDIATEK_MT8183),y)
 
+bootblock-y += bootblock.c
 bootblock-$(CONFIG_SPI_FLASH) += flash_controller.c
 bootblock-$(CONFIG_SPI_FLASH) += spi.c
 bootblock-y += ../common/timer.c
 ifeq ($(CONFIG_BOOTBLOCK_CONSOLE),y)
 bootblock-$(CONFIG_DRIVERS_UART) += ../common/uart.c
 endif
+bootblock-y += ../common/wdt.c
 
 verstage-$(CONFIG_SPI_FLASH) += flash_controller.c
 verstage-$(CONFIG_SPI_FLASH) += spi.c
 verstage-y += ../common/timer.c
 verstage-$(CONFIG_DRIVERS_UART) += ../common/uart.c
+verstage-y += ../common/wdt.c
 
 romstage-$(CONFIG_SPI_FLASH) += flash_controller.c
 romstage-$(CONFIG_SPI_FLASH) += spi.c
 romstage-y += ../common/timer.c
 romstage-$(CONFIG_DRIVERS_UART) += ../common/uart.c
+romstage-y += ../common/wdt.c
 
 ramstage-y += ../common/cbmem.c emi.c
 ramstage-$(CONFIG_SPI_FLASH) += flash_controller.c
 ramstage-$(CONFIG_SPI_FLASH) += spi.c
 ramstage-y += ../common/timer.c
 ramstage-$(CONFIG_DRIVERS_UART) += ../common/uart.c
+ramstage-y += ../common/wdt.c
 
 CPPFLAGS_common += -Isrc/soc/mediatek/mt8183/include
 CPPFLAGS_common += -Isrc/soc/mediatek/common/include

src/soc/mediatek/mt8183/bootblock.c

@@ -0,0 +1,22 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 MediaTek Inc.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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.
+ */
+
+#include <bootblock_common.h>
+#include <soc/wdt.h>
+
+void bootblock_soc_init(void)
+{
+	mtk_wdt_init();
+}

src/soc/mediatek/mt8183/include/soc/addressmap.h

@@ -22,6 +22,7 @@ enum {
 };
 
 enum {
+	RGU_BASE	= IO_PHYS + 0x00007000,
 	GPT_BASE	= IO_PHYS + 0x00008000,
 	UART0_BASE	= IO_PHYS + 0x01002000,
 };