x86: Add support for Advantech SOM-6896

Advantech SOM-6896 is a Broadwell U based COM Express Compact Module
Type 6. This patch adds support for it as a coreboot payload.

On board SATA and SPI are functional. On board Ethernet isn't functional
but since it's optional and ties up a PCIe x4 that is otherwise brought
out, this isn't a concern at the moment. USB doesn't work since the
xHCI driver appears to be broken.

Signed-off-by: George McCollister <george.mccollister@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

arch/x86/dts/Makefile

@@ -6,7 +6,8 @@ dtb-y += bayleybay.dtb \
 	galileo.dtb \
 	minnowmax.dtb \
 	qemu-x86_i440fx.dtb \
-	qemu-x86_q35.dtb
+	qemu-x86_q35.dtb \
+	broadwell_som-6896.dtb
 
 targets += $(dtb-y)
 

arch/x86/dts/broadwell_som-6896.dts

@@ -0,0 +1,43 @@
+/dts-v1/;
+
+/include/ "skeleton.dtsi"
+/include/ "serial.dtsi"
+/include/ "rtc.dtsi"
+
+/ {
+	model = "Advantech SOM-6896";
+	compatible = "advantech,som-6896", "intel,broadwell";
+
+	aliases {
+		spi0 = "/spi";
+	};
+
+	config {
+	       silent_console = <0>;
+	};
+
+	chosen {
+		stdout-path = "/serial";
+	};
+
+	pci {
+		compatible = "pci-x86";
+		#address-cells = <3>;
+		#size-cells = <2>;
+		u-boot,dm-pre-reloc;
+		ranges = <0x02000000 0x0 0xe0000000 0xe0000000 0 0x10000000
+			0x42000000 0x0 0xd0000000 0xd0000000 0 0x10000000
+			0x01000000 0x0 0x2000 0x2000 0 0xe000>;
+	};
+
+	spi {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "intel,ich-spi";
+		spi-flash@0 {
+			reg = <0>;
+			compatible = "winbond,w25q128", "spi-flash";
+			memory-map = <0xff000000 0x01000000>;
+		};
+	};
+};

include/configs/som-6896.h

@@ -0,0 +1,38 @@
+/*
+ * Configuration settings for the SOM-6896
+ *
+ * Copyright (C) 2015 NovaTech LLC
+ * George McCollister <george.mccollister@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __CONFIG_H
+#define __CONFIG_H
+
+#include <configs/x86-common.h>
+
+#define CONFIG_SYS_MONITOR_LEN		(1 << 20)
+
+#define CONFIG_BOARD_EARLY_INIT_F
+#define CONFIG_MISC_INIT_R
+
+#define CONFIG_SCSI_DEV_LIST	\
+	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_WILDCATPOINT_AHCI}
+
+#define CONFIG_SYS_EARLY_PCI_INIT
+#define CONFIG_PCI_PNP
+
+#define VIDEO_IO_OFFSET			0
+#define CONFIG_X86EMU_RAW_IO
+
+#define CONFIG_ARCH_EARLY_INIT_R
+
+#define CONFIG_STD_DEVICES_SETTINGS     "stdin=serial,vga,usbkbd\0" \
+					"stdout=serial,vga\0" \
+					"stderr=serial,vga\0"
+
+#define CONFIG_ENV_SECT_SIZE		0x1000
+#define CONFIG_ENV_OFFSET		0x00ff0000
+
+#endif	/* __CONFIG_H */