# Unmaintained: Downstream port, only for reference. Use mainline port (samsung-janice)!
# Reference: <https://postmarketos.org/vendorkernel>
# Kernel config based on: arch/arm/configs/janice_defconfig

pkgname=linux-samsung-janice-downstream
pkgver=3.0.101
pkgrel=0
pkgdesc="Samsung Galaxy S Advance kernel from Epirex"
arch="armhf"
_carch="arm"
_flavor="samsung-janice"
url="https://github.com/Epirex/Samsung_STE_Kernel"
license="GPL2"
options="!strip !check !tracedeps pmb:cross-native"
makedepends="perl sed installkernel bash gmp-dev bc linux-headers elfutils-dev devicepkg-dev busybox-static-armhf gcc6"

# Compiler: this kernel was only tested with GCC6. Feel free to make a merge
# request if you find out that it is booting working with newer GCCs as
# well. See <https://postmarketos.org/vendorkernel> for instructions.
if [ "${CC:0:5}" != "gcc6-" ]; then
	CC="gcc6-$CC"
	HOSTCC="gcc6-gcc"
	CROSS_COMPILE="gcc6-$CROSS_COMPILE"
fi

# Source
_repository="Samsung_STE_Kernel"
_commit="ac7219c4b8dcec7bc5a598d42c6be0db4aa36332"
_config="config-$_flavor.armhf"
source="
	$pkgname-$_commit.tar.gz::https://github.com/Epirex/$_repository/archive/$_commit.tar.gz
	$_config
	00_fix_return_address.patch
	01_remove_ramdisks_from_initramfs.patch
	02_reduce_lzo_compression.patch
	03_change_modules_install_dir.patch
	04_change_dhd_firmware_dir.patch
	05_fix_fb_rgb_mode.patch
	init
"
builddir="$srcdir/$_repository-$_commit"

prepare() {
	default_prepare
	. downstreamkernel_prepare

	# Use Alpine's busybox.static instead of the pre-compiled busybox shipped
	# with the source
	cp -v /usr/$(arch_to_hostspec $arch)/bin/busybox.static \
		"$builddir"/usr/u8500_initramfs_files/busybox

	# use custom init script in the initramfs which loads the initramfs from
	# the kernel2 partition ("isorec")
	cp -v "$srcdir"/init "$builddir"/usr/u8500_initramfs_files/init
}

build() {
	unset LDFLAGS
	make ARCH="$_carch" CC="${CC:-gcc}" \
		KBUILD_BUILD_VERSION="$((pkgrel + 1))-postmarketOS"
	# the 'no-pic' flag is necessary to avoid the
	# error 'Unknown symbol _GLOBAL_OFFSET_TABLE_ (err 0)' when loading the module
	make ARCH="$_carch" CC="${CC:-gcc}" CFLAGS_MODULE="-fno-pic" \
		KBUILD_BUILD_VERSION="$((pkgrel + 1))-postmarketOS" modules
}

package() {
	downstreamkernel_package "$builddir" "$pkgdir" "$_carch" "$_flavor"

	# Modules
	unset LDFLAGS
	make ARCH="$_carch" CC="${CC:-gcc}" \
		KBUILD_BUILD_VERSION="$((pkgrel + 1))-postmarketOS" \
		INSTALL_MOD_PATH="$pkgdir" INSTALL_MOD_STRIP=1 \
		modules_install
}

sha512sums="bb8218d803ec27f983449a43d14df75122311609a39e5b57095f4e8933752a2699fa0d4df1674aeee7d6e3a439551dacc9af3cab26b6e3e71f0441a4f16693df  linux-samsung-janice-downstream-ac7219c4b8dcec7bc5a598d42c6be0db4aa36332.tar.gz
803896d20e7a26214652daf3848c6b0db015477525e02ccb7299029c3d4dd97a45c164af7dde869325e51599baa4491491a56f9b7c358d7b68d505fdae730a44  config-samsung-janice.armhf
ea1d3b5a234fa565e3c1a792de48f4fc4e6023d281d303c8e319c7ef28edc5739ab0e4dea0139a41f0a5c7d03e27921ccaa214fd0ac5c72245a094ce60128864  00_fix_return_address.patch
3c8e15644eced6f73c5c7d3df0437f3a9f750f4ec32d744c9e4266ccccef9e38316a898227a898a9fc0696bee0281c0e14312de2944e27a696f18a42deabb383  01_remove_ramdisks_from_initramfs.patch
ef5b912c26fea4ab882592bdf7487942c64b123de8d25d08d976f29743f311742ee2f773bf2d110ddb5095f254dbb0bd4487c5cfce77311929082599199e7ebd  02_reduce_lzo_compression.patch
27bba6d070db6f499d030680c020906fc3238dc60d90a9b2f0f3a355ef15beb227c1cf48b7858156264fe10f7943772ed00a837be36ba4b80de8199f0383e688  03_change_modules_install_dir.patch
47533412cc91d2ead046039c90180ebc459e157017be85dca69cd882a183963448beb973f2cb7eaccbcd35354b0ed6a668131cd39ea30393dd52fd93b7e26815  04_change_dhd_firmware_dir.patch
67278735e21c00d4208e76788d3d99ff1bd9c628608f60a73004f6deb8a4bc75fdf7c1e43108010c57aa6da06aa5e49292b109a2c4421212e181abaca45ea44d  05_fix_fb_rgb_mode.patch
ef01c51c138239a49c1d00ae0074a07fed267d64934cf3d436a8ff057b91692ee2d040a45eacbb0dc62d5017a708c4dca2fadc282c850fa72aeebcfa787e2cbc  init"