x86: Add DFI BT700 BayTrail board support

This patch adds support for the DFI BayTrail BT700 QSeven SoM installed
on the DFI Q7X-151 baseboard. The baseboard is equipped with the Nuvoton
NCT6102D Super IO chip providing the UART as console.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

7 files changed, 110 insertions, 0 deletions

diff --git a/board/dfi/dfi-bt700/Kconfig b/board/dfi/dfi-bt700/Kconfig
new file mode 100644
index 0000000..3f0acb3
--- /dev/null
+++ b/board/dfi/dfi-bt700/Kconfig
@@ -0,0 +1,28 @@
+if TARGET_DFI_BT700
+
+config SYS_BOARD
+	default "dfi-bt700"
+
+config SYS_VENDOR
+	default "dfi"
+
+config SYS_SOC
+	default "baytrail"
+
+config SYS_CONFIG_NAME
+	default "dfi-bt700"
+
+config SYS_TEXT_BASE
+	default 0xfff00000 if !EFI_STUB
+	default 0x01110000 if EFI_STUB
+
+config BOARD_SPECIFIC_OPTIONS # dummy
+	def_bool y
+	select X86_RESET_VECTOR if !EFI_STUB
+	select INTEL_BAYTRAIL
+	select BOARD_ROMSIZE_KB_8192
+
+config PCIE_ECAM_BASE
+	default 0xe0000000
+
+endif
diff --git a/board/dfi/dfi-bt700/MAINTAINERS b/board/dfi/dfi-bt700/MAINTAINERS
new file mode 100644
index 0000000..9c3d699
--- /dev/null
+++ b/board/dfi/dfi-bt700/MAINTAINERS
@@ -0,0 +1,8 @@
+congatec DFI-BT700
+M:	Stefan Roese <sr@denx.de>
+S:	Maintained
+F:	board/dfi/dfi-bt700
+F:	include/configs/dfi-bt700.h
+F:	configs/dfi-bt700-q7x-151_defconfig
+F:	arch/x86/dts/dfi-bt700.dtsi
+F:	arch/x86/dts/dfi-bt700-q7x-151.dts
diff --git a/board/dfi/dfi-bt700/Makefile b/board/dfi/dfi-bt700/Makefile
new file mode 100644
index 0000000..8052f5e
--- /dev/null
+++ b/board/dfi/dfi-bt700/Makefile
@@ -0,0 +1,8 @@
+#
+# Copyright (C) 2015, Google, Inc
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	+= dfi-bt700.o start.o
+obj-$(CONFIG_GENERATE_ACPI_TABLE) += dsdt.o
diff --git a/board/dfi/dfi-bt700/acpi/mainboard.asl b/board/dfi/dfi-bt700/acpi/mainboard.asl
new file mode 100644
index 0000000..544a049
--- /dev/null
+++ b/board/dfi/dfi-bt700/acpi/mainboard.asl
@@ -0,0 +1,13 @@
+/*
+ * Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/* Power Button */
+Device (PWRB)
+{
+	Name(_HID, EISAID("PNP0C0C"))
+}
+
+/* TODO: Need add Nuvoton SuperIO chipset NCT6102D ASL codes */
diff --git a/board/dfi/dfi-bt700/dfi-bt700.c b/board/dfi/dfi-bt700/dfi-bt700.c
new file mode 100644
index 0000000..8645bdc
--- /dev/null
+++ b/board/dfi/dfi-bt700/dfi-bt700.c
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2016 Stefan Roese <sr@denx.de>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <nuvoton_nct6102d.h>
+#include <asm/gpio.h>
+#include <asm/ibmpc.h>
+#include <asm/pnp_def.h>
+
+int board_early_init_f(void)
+{
+#ifdef CONFIG_INTERNAL_UART
+	/* Disable the legacy UART which is enabled per default */
+	nct6102d_uarta_disable();
+#else
+	/*
+	 * The FSP enables the BayTrail internal legacy UART (again).
+	 * Disable it again, so that the Nuvoton one can be used.
+	 */
+	setup_internal_uart(0);
+#endif
+
+	/* Disable the watchdog which is enabled per default */
+	nct6102d_wdt_disable();
+
+	return 0;
+}
diff --git a/board/dfi/dfi-bt700/dsdt.asl b/board/dfi/dfi-bt700/dsdt.asl
new file mode 100644
index 0000000..6042011
--- /dev/null
+++ b/board/dfi/dfi-bt700/dsdt.asl
@@ -0,0 +1,14 @@
+/*
+ * Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+DefinitionBlock("dsdt.aml", "DSDT", 2, "U-BOOT", "U-BOOTBL", 0x00010000)
+{
+	/* platform specific */
+	#include <asm/arch/acpi/platform.asl>
+
+	/* board specific */
+	#include "acpi/mainboard.asl"
+}
diff --git a/board/dfi/dfi-bt700/start.S b/board/dfi/dfi-bt700/start.S
new file mode 100644
index 0000000..2c941a4
--- /dev/null
+++ b/board/dfi/dfi-bt700/start.S
@@ -0,0 +1,9 @@
+/*
+ * Copyright (C) 2015, Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+.globl early_board_init
+early_board_init:
+	jmp	early_board_init_ret