configs: update cubieboard2 defconfig

This patch updates the Cubieboard2 board defconfig to use newer u-boot
and linux versions, along with a few other improvements.
The other improvements were mostly backported from the recent Orange Pi
defconfig inclusion and are related to image generation.
linux-sunxi.org was used as a reference for both linux and u-boot
defconfig names.

In detail:
- Update linux to vanilla upstream -- currently 4.3.3 is the most
up-to-date. Although it lacks some features present only in the
linux-sunxi 3.4 branch, upstream support appears to be relatively mature
and is already being deployed by default by distributions such as Arch
Linux ARM.
- Update u-boot to vanilla upstream 2015.10. According to
linux-sunxi.org, upstream fully supports major functions (except NAND)
since 2015.07.
- Change image format to zImage and drop custom image generation script
in favour of genimage, as pointed out by reviewers in the Orange Pi
defconfig submission.

This was tested in a Cubieboard2 board with boot from mmc and it boots
fine to login prompt.

This has not been tested in a Cubieboard (A10) as I don't own any; the
version bumps probably apply to it although there are some differences
(lack of VFPv4 support, Cortex-A8 instead of Cortex-A7), so I have kept
the current Cubieboard defconfig and its scripts. This one has been only
build-tested.

Signed-off-by: Erico Nunes <nunes.erico@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

board/cubietech/cubieboard2/boot.cmd

@@ -0,0 +1,5 @@
+setenv fdt_high ffffffff
+setenv bootargs console=ttyS0,115200 earlyprintk root=/dev/mmcblk0p2 rootwait
+fatload mmc 0 $kernel_addr_r zImage
+fatload mmc 0 $fdt_addr_r sun7i-a20-cubieboard2.dtb
+bootz $kernel_addr_r - $fdt_addr_r

board/cubietech/cubieboard2/genimage.cfg

@@ -0,0 +1,36 @@
+# Minimal SD card image for the Cubieboard2
+# Based in the Orange Pi genimage.cfg
+
+image boot.vfat {
+	vfat {
+		files = {
+			"zImage",
+			"sun7i-a20-cubieboard2.dtb",
+			"boot.scr"
+		}
+	}
+	size = 10M
+}
+
+image sdcard.img {
+	hdimage {
+	}
+
+	partition u-boot {
+		in-partition-table = "no"
+		image = "u-boot-sunxi-with-spl.bin"
+		offset = 8192
+	}
+
+	partition boot {
+		partition-type = 0xC
+		bootable = "true"
+		image = "boot.vfat"
+	}
+
+	partition rootfs {
+		partition-type = 0x83
+		image = "rootfs.ext4"
+		size = 512M
+	}
+}

board/cubietech/cubieboard2/post-build.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+# post-build.sh for Cubieboard2
+# 2013, Carlo Caione <carlo.caione@gmail.com>
+
+BOARD_DIR="$(dirname $0)"
+MKIMAGE=$HOST_DIR/usr/bin/mkimage
+BOOT_CMD=$BOARD_DIR/boot.cmd
+BOOT_CMD_H=$BINARIES_DIR/boot.scr
+
+# U-Boot script
+$MKIMAGE -C none -A arm -T script -d $BOOT_CMD $BOOT_CMD_H

board/cubietech/cubieboard2/post-image.sh

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+BOARD_DIR="$(dirname $0)"
+GENIMAGE_CFG="${BOARD_DIR}/genimage.cfg"
+GENIMAGE_TMP="${BUILD_DIR}/genimage.tmp"
+
+rm -rf "${GENIMAGE_TMP}"
+
+genimage                           \
+	--rootpath "${TARGET_DIR}"     \
+	--tmppath "${GENIMAGE_TMP}"    \
+	--inputpath "${BINARIES_DIR}"  \
+	--outputpath "${BINARIES_DIR}" \
+	--config "${GENIMAGE_CFG}"
+
+exit $?