#!/usr/bin/env zsh
# Copyright (c) 2016 Dyne.org Foundation
# arm-sdk is written and maintained by Ivan J. <parazyd@dyne.org>
#
# This file is part of arm-sdk
#
# This source code 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 3 of the License, or
# (at your option) any later version.
#
# This software 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 source code. If not, see <http://www.gnu.org/licenses/>.

## kernel build script for Cubieboard2 boards

## settings & config
vars+=(device_name arch size parted_type parted_boot parted_root inittab)
vars+=(gitkernel gitbranch sunxi_tools sunxi_uboot sunxi_boards)
arrs+=(custmodules extra_packages)

device_name="cubietruck"
arch="armhf"
size=1337
inittab="T1:12345:respawn:/sbin/agetty -L ttyS0 115200 vt100"

parted_type="dos"
parted_boot="fat32 2048s 264191s"
parted_root="ext4 264192s 100%"

extra_packages=()
custmodules=(sunxi_emac)

gitkernel="https://github.com/linux-sunxi/linux-sunxi.git"
gitbranch="sunxi-3.4"
sunxi_tools="https://github.com/linux-sunxi/sunxi-tools.git"
sunxi_uboot="https://github.com/linux-sunxi/u-boot-sunxi.git"
sunxi_boards="https://github.com/linux-sunxi/sunxi-boards.git"

## official defconfig
linux_defconfig="https://github.com/cubieboard/cubie_configs/raw/master/kernel-configs/3.4/cubieboard2_defconfig"

prebuild() {
	fn prebuild
	req=(device_name strapdir)
	ckreq || return 1

	notice "executing $device_name prebuild"

	write-fstab
}

postbuild() {
	fn postbuild

	notice "executing $device_name postbuild"
}

build_kernel_armhf() {
	fn build_kernel_armhf
	req=(R arch device_name gitkernel gitbranch MAKEOPTS)
	req+=(strapdir sunxi_tools sunxi_uboot sunxi_boards)
	req+=(loopdevice)
	ckreq || return 1

	prebuild || zerr

	notice "building $arch kernel"
	mkdir -p $R/tmp/kernels/$device_name

	clone-git $sunxi_boards "$R/tmp/kernels/$device_name/sunxi-boards" master
	clone-git $sunxi_tools  "$R/tmp/kernels/$device_name/sunxi-tools" master
	clone-git $sunxi_uboot  "$R/tmp/kernels/$device_name/sunxi-uboot"

	pushd $R/tmp/kernels/$device_name/sunxi-tools
	act "running fex2bin"
	make fex2bin
	sudo ./fex2bin $R/tmp/kernels/$device_name/sunxi-boards/sys_config/a20/cubieboard2.fex \
		$strapdir/boot/script.bin
	popd

	get-kernel-sources
	pushd $R/tmp/kernels/$device_name/${device_name}-linux
	wget -O .config $linux_defconfig
	#copy-kernel-config
	make $MAKEOPTS uImage modules
	sudo -E PATH="$PATH" \
		make INSTALL_MOD_PATH=$strapdir modules_install ## this replaces make-kernel-modules
	popd

	sudo rm -rf $strapdir/lib/firmware
	get-kernel-firmware
	sudo cp $CPVERBOSE -ra $R/tmp/linux-firmware $strapdir/lib/firmware

	pushd $R/tmp/kernels/$device_name/${device_name}-linux
	sudo -E PATH="$PATH" \
		make INSTALL_MOD_PATH=$strapdir firmware_install
	#make mrproper
	wget -O .config $linux_defconfig
	#copy-kernel-config
	sudo -E PATH="$PATH" \
		make modules_prepare
	popd

	notice "building u-boot"
	pushd $R/tmp/kernels/$device_name/sunxi-uboot
	make distclean
	make Cubieboard2_config
	make $MAKEOPTS
	act "dd-ing to image..."
	sudo dd if=u-boot-sunxi-with-spl.bin of=$loopdevice bs=1024 seek=8

	notice "creating boot.cmd"
	cat <<EOF | sudo tee ${strapdir}/boot/boot.cmd
setenv bootm_boot_mode sec
setenv bootargs console=ttyS0,115200 root=/dev/mmcblk0p2 rootwait panic=10 ${extra} rw rootfstype=ext4 net.ifnames=0
fatload mmc 0 0x43000000 script.bin
fatload mmc 0 0x48000000 uImage
bootm 0x48000000
EOF

	notice "creating u-boot script image"
	sudo mkimage -A arm -T script -C none -d $strapdir/boot/boot.cmd $strapdir/boot/boot.scr

	postbuild || zerr
}