# Based on linux-lg-mako. Changes:
# - add findutils makedepend (necessary for the initramfs)
# - it builds an initramfs - do not use ramdisk.cpio and
#	ramdisk-recovery-device.cpio, in there, always use the
#	initramfs from the recovery partition ("isorec")
# - directly boot to that initramfs, not only when the recovery
#	key combination was pressed.
# - use Alpine's busybox-static instead of the pre-compiled
#	binary, that comes with the source
#
# Kernel config changes, based on: arch/arm/configs/latona_defconfig
# - enable devtmpfs (needed for udev -> touch support in weston)
# - change compression from CONFIG_KERNEL_LZMA=y to
#	CONFIG_KERNEL_GZIP=y (so it works with busybox)

_vendor=samsung
_flavor=samsung-i9003
_hash="7b8d73dd32e6cd21107f9a963a32a5ed237a6e78"
_config="config-${_flavor}.armhf"

pkgname=linux-${_flavor}
pkgver=3.0.101
case $pkgver in
	*.*.*)  _kernver=${pkgver%.*};;
	*.*) _kernver=$pkgver;;
esac
pkgrel=9
arch="armhf"
pkgdesc="Samsung Galaxy SI SLC kernel"
url="https://github.com/dhiru1602/android_kernel_samsung_latona"
depends="postmarketos-mkinitfs"
makedepends="perl sed installkernel bash gmp-dev bc linux-headers elfutils-dev
findutils busybox-static-armhf"
options="!strip !check !tracedeps"
install=
source="
	$pkgname-$_hash.tar.gz::https://github.com/dhiru1602/android_kernel_samsung_latona/archive/${_hash}.tar.gz
	$_config
	compiler-gcc6.h
	00_return_address.patch
	01_twl_power_init.patch
	02_mfd_driver_fix.patch
	init
"
subpackages=""
license="GPL2"

_abi_release=${pkgver}
_carch="arm"
HOSTCC="${CC:-gcc}"
HOSTCC="${HOSTCC#${CROSS_COMPILE}}"

ksrcdir="$srcdir/android_kernel_samsung_latona-${_hash}"

prepare() {
	local _patch_failed=
	cd "$ksrcdir"

	# first apply patches in specified order
	for i in $source; do
		case $i in
		*.patch)
			msg "Applying $i..."
			if ! patch -s -p1 -N -i "$srcdir"/$i; then
				echo $i >>failed
				_patch_failed=1
			fi
			;;
		esac
	done

	if ! [ -z "$_patch_failed" ]; then
		error "The following patches failed:"
		cat failed
		return 1
	fi

	# gcc6 support
	cp -v "$srcdir/compiler-gcc6.h" "$ksrcdir/include/linux/"

	mkdir -p "$srcdir"/build
	cp "$srcdir"/$_config "$srcdir"/build/.config
	make -C "$ksrcdir" O="$srcdir"/build ARCH="$_carch" HOSTCC="$HOSTCC" \
		silentoldconfig


	mkdir "$ksrcdir"/usr/latona_initramfs_files/

	# Use Alpine's busybox.static instead of the pre-compiled busybox shipped
	# with the source
	cp -v /usr/$(arch_to_hostspec $arch)/bin/busybox.static \
		"$ksrcdir"/usr/latona_initramfs_files/busybox

	# use custom init script in the initramfs which loads the initramfs from
	# the kernel2 partition ("isorec")
	cp -v "$srcdir"/init "$ksrcdir"/usr/latona_initramfs_files/init

	mkdir -p "$srcdir"/build
	cp "$srcdir"/$_config "$srcdir"/build/.config
	make -C "$ksrcdir" O="$srcdir"/build ARCH="$_carch" HOSTCC="$HOSTCC" \
		silentoldconfig
}



# this is so we can do: 'abuild menuconfig' to reconfigure kernel
menuconfig() {
	cd "$srcdir"/build
	make ARCH="$_carch" menuconfig
	#ARCH="$_carch" "$ksrcdir"/scripts/kconfig/merge_config.sh "$ksrcdir"/arch/arm/config/latona_defconfig "$ksrcdir"/android/configs/android-base.cfg "$ksrcdir"/android/configs/android-recommended.cfg
	cp .config "$startdir"/$_config
}

build() {
	cd "$srcdir"/build
	unset LDFLAGS

	make ARCH="$_carch" CC="${CC:-gcc}" \
		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-Alpine"
}

package() {
	install -Dm644 "$srcdir/build/arch/arm/boot/zImage" \
		"$pkgdir/boot/vmlinuz-$_flavor"

	install -D "$srcdir/build/include/config/kernel.release" \
		"$pkgdir/usr/share/kernel/$_flavor/kernel.release"
}

sha512sums="b7ca46b856a0c160ae36a98da39147deb85c054e902447ab68bcd4a011986eee486fb681d0bb832b9b57797aca35332483e99379b792bd467b1f030328bd83c7  linux-samsung-i9003-7b8d73dd32e6cd21107f9a963a32a5ed237a6e78.tar.gz
ac6d9fd10aca7a9460d26bd78d70a6aacfdc9ca28ec10a04210211f748724dbb0018c6388d407327c8736f896c956b0d8ba4b3c72f05e65cd664a8261381a9a9  config-samsung-i9003.armhf
d80980e9474c82ba0ef1a6903b434d8bd1b092c40367ba543e72d2c119301c8b2d05265740e4104ca1ac5d15f6c4aa49e8776cb44264a9a28dc551e0d1850dcc  compiler-gcc6.h
c40eaa11547f5bc2b1ff965506bdfe3015ff16e4b5ad9ccb3b8134ceafd1d32407c4ef2b213e02e036ce1e9bdcbfe768dff7d4b054bec77705a176c1f783b6f5  00_return_address.patch
1972a2b5c429d6bf5fa1423e8805bb89bbd80c4efe6d235cb2037de6ba4d15c01e90239392161d6e5a0802eafaab6e8b468a49a12dc5b66469a111262cde2047  01_twl_power_init.patch
5b951a2ab60a89fbc3ca209960987035001a6f9147f8ab5c05a6b49ec6dee75d0b6d053bef28df37e583bfc903599beed16692e25ee363e6200e14839d0dda65  02_mfd_driver_fix.patch
dd4094d5f4ec281d32f12af88cb22a782e497c8e52f69cf60b73ac7d6171fc95f1f8040b3d0ad2ff3f016d22ac1d91c5b522e5d03203534a76742bc55a082af5  init"