# Template file for 'rpi-kernel'
#
# We track the latest Raspberry Pi LTS kernel as that is what is used in the
# official Raspbian distribution. This is currently 5.10:
#
# https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=288234
#
# Commit hash is picked from latest tag [1], if appropriate, or from latest
# "Merge remote-tracking branch 'stable/linux-5.10.y' into rpi-5.10.y" commit.
#
# [1] https://github.com/raspberrypi/linux/tags
#
# WARNING: keep all rpi*-kernel packages in sync

_githash="650082a559a570d6c9d2739ecc62843d6f951059"
_gitshort="${_githash:0:7}"

pkgname=rpi-kernel
version=5.10.92
revision=1
archs="armv6l*"
wrksrc="linux-${_githash}"
hostmakedepends="perl kmod uboot-mkimage openssl-devel bc bison flex"
makedepends="ncurses-devel"
maintainer="Piraty <piraty1@inbox.ru>"
homepage="http://www.kernel.org"
license="GPL-2.0-only"
short_desc="Linux kernel for Raspberry Pi zero/1 (${version%.*} series [git ${_gitshort}])"
distfiles="https://github.com/raspberrypi/linux/archive/${_githash}.tar.gz"
checksum=ae8b1635a33316ef9b85a4f0ce77d0032c74fbe2ef127755b17cd34d265c48d8
python_version=3

_kernver="${version}_${revision}"

nodebug=yes
nostrip=yes
noverifyrdeps=yes
noshlibprovides=yes

triggers="kernel-hooks"
# These files could be modified when an external module is built.
mutable_files="
	/usr/lib/modules/${_kernver}/modules.dep
	/usr/lib/modules/${_kernver}/modules.dep.bin
	/usr/lib/modules/${_kernver}/modules.symbols
	/usr/lib/modules/${_kernver}/modules.symbols.bin
	/usr/lib/modules/${_kernver}/modules.alias
	/usr/lib/modules/${_kernver}/modules.alias.bin
	/usr/lib/modules/${_kernver}/modules.devname"

_arch=
case "$XBPS_TARGET_MACHINE" in
	arm*) _arch=arm ;;
	aarch64*) _arch=arm64 ;;
esac
_cross=
if [ "$CROSS_BUILD" ]; then
	_cross="CROSS_COMPILE=${XBPS_CROSS_TRIPLET}-"
fi

pre_configure() {
	# Remove .git directory, otherwise scripts/setkernelversion.sh
	# modifies KERNELRELEASE and appends + to it.
	rm -rf .git
}
do_configure() {
	local target defconfig

	# Use upstream's default configuration, no need to maintain ours.
	case "$XBPS_TARGET_MACHINE" in
		armv6l*)
			target=bcmrpi_defconfig
			;;
	esac

	defconfig="arch/${_arch}/configs/${target}"
	echo "CONFIG_CONNECTOR=y" >> "$defconfig"
	echo "CONFIG_PROC_EVENTS=y" >> "$defconfig"
	echo "CONFIG_F2FS_FS_SECURITY=y" >> "$defconfig"
	echo "CONFIG_CGROUP_PIDS=y" >> "$defconfig"

	# IR Remote Support
	echo "CONFIG_RC_CORE=y" >> "$defconfig"
	echo "CONFIG_LIRC=y" >> "$defconfig"
	echo "CONFIG_RC_DECODERS=y" >> "$defconfig"
	echo "CONFIG_RC_DEVICES=y" >> "$defconfig"
	echo "CONFIG_IR_RC6_DECODER=m" >> "$defconfig"
	echo "CONFIG_IR_MCEUSB=m" >> "$defconfig"

	# HID Controllers
	echo "CONFIG_HID_STEAM=y" >> "$defconfig"

	# LXD 4.2+ support
	echo "CONFIG_BRIDGE_VLAN_FILTERING=y" >> "$defconfig"

	make ${makejobs} ${_cross} ARCH=${_arch} ${target}

	# Always use our revision to CONFIG_LOCALVERSION to match our pkg version.
	vsed -i -e "s|^\(CONFIG_LOCALVERSION=\).*|\1\"_${revision}\"|" .config
}
do_build() {
	local target

	case "$XBPS_TARGET_MACHINE" in
		arm*)
			target="zImage modules dtbs"
			;;
		aarch64*)
			target="Image modules dtbs"
			;;
	esac

	make ${makejobs} ${_cross} ARCH=${_arch} prepare
	make ${makejobs} ${_cross} ARCH=${_arch} ${target}
}
do_install() {
	local hdrdest

	# Run depmod after compressing modules.
	sed -i '2iexit 0' scripts/depmod.sh

	# Install kernel, firmware and modules
	make ${makejobs} ARCH=${_arch} INSTALL_MOD_PATH=${DESTDIR} modules_install

	# Install device tree blobs
	make ${makejobs} ARCH=${_arch} INSTALL_DTBS_PATH=${DESTDIR}/boot dtbs_install

	# Generate kernel.img and install it to destdir.
	vmkdir boot
	cp arch/arm/boot/zImage ${DESTDIR}/boot/kernel.img

	hdrdest=${DESTDIR}/usr/src/${sourcepkg}-headers-${_kernver}

	# Switch to /usr.
	vmkdir usr
	mv ${DESTDIR}/lib ${DESTDIR}/usr

	cd ${DESTDIR}/usr/lib/modules/${_kernver}
	rm -f source build
	ln -sf ../../../src/${sourcepkg}-headers-${_kernver} build

	cd ${wrksrc}
	# Install required headers to build external modules
	install -Dm644 Makefile ${hdrdest}/Makefile
	install -Dm644 kernel/Makefile ${hdrdest}/kernel/Makefile
	install -Dm644 .config ${hdrdest}/.config
	for file in $(find . -name Kconfig\*); do
		mkdir -p ${hdrdest}/$(dirname $file)
		install -Dm644 $file ${hdrdest}/${file}
	done
	for file in $(find arch/${_arch} scripts -name module.lds -o -name Kbuild.platforms -o -name Platform); do
		mkdir -p ${hdrdest}/$(dirname $file)
		install -Dm644 $file ${hdrdest}/${file}
	done
	mkdir -p ${hdrdest}/include

	# Remove firmware stuff provided by the "linux-firmware" pkg.
	rm -rf ${DESTDIR}/usr/lib/firmware

	for i in acpi asm-generic clocksource config crypto drm generated linux \
		math-emu media net pcmcia scsi sound trace uapi vdso video xen; do
		[ -d include/$i ] && cp -a include/$i ${hdrdest}/include
	done

	cd ${wrksrc}
	# Remove helper binaries built for host,
	# if generated files from the scripts/ directory need to be included,
	# they need to be copied to ${hdrdest} before this step
	if [ "$CROSS_BUILD" ]; then
		make ${makejobs} ARCH=${_arch} _mrproper_scripts
		# remove host specific objects as well
		find scripts -name '*.o' -delete
	fi

	# Copy files necessary for later builds.
	cp Module.symvers ${hdrdest}
	cp -a scripts ${hdrdest}
	mkdir -p ${hdrdest}/security/selinux
	cp -a security/selinux/include ${hdrdest}/security/selinux
	mkdir -p ${hdrdest}/tools/include
	cp -a tools/include/tools ${hdrdest}/tools/include
	if [ -d "arch/${_arch}/tools" ]; then
		cp -a arch/${_arch}/tools ${hdrdest}/arch/${_arch}
	fi

	# copy arch includes for external modules
	mkdir -p ${hdrdest}/arch/${_arch}
	cp -a arch/${_arch}/include ${hdrdest}/arch/${_arch}

	mkdir -p ${hdrdest}/arch/${_arch}/kernel
	cp arch/${_arch}/Makefile ${hdrdest}/arch/${_arch}
	cp arch/${_arch}/kernel/asm-offsets.s ${hdrdest}/arch/${_arch}/kernel
	if [ "$_arch" = "arm64" ] ; then
		cp -a arch/${_arch}/kernel/vdso ${hdrdest}/arch/${_arch}/kernel/
	fi

	# Add md headers
	mkdir -p ${hdrdest}/drivers/md
	cp drivers/md/*.h ${hdrdest}/drivers/md

	# Add inotify.h
	mkdir -p ${hdrdest}/include/linux
	cp include/linux/inotify.h ${hdrdest}/include/linux

	# Add wireless headers
	mkdir -p ${hdrdest}/net/mac80211/
	cp net/mac80211/*.h ${hdrdest}/net/mac80211

	# add dvb headers for external modules
	mkdir -p ${hdrdest}/include/config/dvb/
	cp include/config/dvb/*.h ${hdrdest}/include/config/dvb/

	# Remove unneeded architectures
	# (save the correct one + Kconfig and delete all others)
	mkdir -p arch-backup
	cp -r ${hdrdest}/arch/${_arch} ${hdrdest}/arch/Kconfig arch-backup/
	rm -rf ${hdrdest}/arch
	mv arch-backup ${hdrdest}/arch
	# Keep arch/x86/ras/Kconfig as it is needed by drivers/ras/Kconfig
	mkdir -p ${hdrdest}/arch/x86/ras
	cp -a arch/x86/ras/Kconfig ${hdrdest}/arch/x86/ras/Kconfig

	# Compress all modules with xz to save a few MBs.
	msg_normal "$pkgver: compressing kernel modules with gzip, please wait...\n"
	find ${DESTDIR} -name '*.ko' | xargs -n1 -P0 gzip -9

	# ... and run depmod again.
	depmod -b ${DESTDIR}/usr -F System.map ${_kernver}
}

rpi-kernel-headers_package() {
	nostrip=yes
	noverifyrdeps=yes
	noshlibprovides=yes
	short_desc="${short_desc/kernel/kernel headers}"
	pkg_install() {
		vmove usr/src
		vmove usr/lib/modules/${_kernver}/build
	}
}


# support legacy systems (before rpi-kernel was split to rpi{,2,3})
# archs != armv6* are emtpy meta packages to pull the new rpi{$n}-kernel package
archs+=" armv7l* aarch64*"
case "$XBPS_TARGET_MACHINE" in
	armv6*) : ;;
	*)
		build_style=meta
		short_desc="Linux kernel for Raspberry Pi (transitional dummy package)"

		pre_configure() { : ; }
		do_configure() { : ; }
		do_build() { : ; }
		do_install() { : ; }

		case "$XBPS_TARGET_MACHINE" in
			armv7*) depends=rpi2-kernel ;;
			aarch64*) depends=rpi3-kernel ;;
		esac

		rpi-kernel-headers_package() {
			build_style=meta
			short_desc="Linux kernel headers for Raspberry Pi (transitional dummy package)"
			case "$XBPS_TARGET_MACHINE" in
				armv7*) depends=rpi2-kernel-headers ;;
				aarch64*) depends=rpi3-kernel-headers ;;
			esac
		}
		;;
esac