# Template file for 'rpi-kernel'
#
# We track the latest Raspberry Pi LTS kernel as that is what is used in the
# official Raspberry Pi OS distribution. This is currently 6.6:
#
# https://forums.raspberrypi.com/viewtopic.php?t=361116
#
# Commit hash is picked from latest tag [1], if appropriate, or from latest
# "Merge remote-tracking branch 'stable/linux-6.x.y' into rpi-6.x.y" commit.
#
# [1] https://github.com/raspberrypi/linux/tags
#
# Upstream documentation: https://www.raspberrypi.com/documentation/computers/linux_kernel.html
#
# XXX: KEEP IN SYNC WITH rpi5-kernel
pkgname=rpi-kernel
version=6.6.78
revision=1
_githash=9afba138031d6ee69824935b507cc9339427ddaf
archs="aarch64* armv6l* armv7l*"
hostmakedepends="perl kmod uboot-mkimage openssl-devel bc bison flex xz pahole
 python3 elfutils-devel cpio tar zstd"
makedepends="ncurses-devel"
short_desc="Linux kernel for Raspberry Pi (${version%.*} series)"
maintainer="classabbyamp <void@placeviolette.net>"
license="GPL-2.0-only"
homepage="http://www.kernel.org"
distfiles="https://github.com/raspberrypi/linux/archive/${_githash}.tar.gz"
checksum=61928e06851b9955e9b63523a4847ce1f942fb506d9cf2a2d2601a0cc6cf7b51
python_version=3

_kernver="${version}_${revision}"
triggers="kernel-hooks"
kernel_hooks_version="${_kernver}"

nodebug=yes # generated manually
nostrip=yes
noverifyrdeps=yes
noshlibprovides=yes

# These files could be modified when an external module is built.
mutable_files="
 /usr/lib/modules/${_kernver}/modules.builtin.bin
 /usr/lib/modules/${_kernver}/modules.builtin.alias.bin
 /usr/lib/modules/${_kernver}/modules.softdep
 /usr/lib/modules/${_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"

# reproducible build
export KBUILD_BUILD_TIMESTAMP=$(LC_ALL=C date -ud @${SOURCE_DATE_EPOCH:-0})
export KBUILD_BUILD_USER=voidlinux
export KBUILD_BUILD_HOST=voidlinux

if [ "$CROSS_BUILD" ]; then
	_cross="CROSS_COMPILE=${XBPS_CROSS_TRIPLET}-"
fi

case "$XBPS_TARGET_MACHINE" in
	aarch64*)
		provides="rpi-kernel-${version}_${revision}"
		replaces="rpi5-kernel>=0"
		;;
	armv[67]*)
		;;
	*)
		broken="No Raspberry Pi exists for this arch"
		;;
esac

do_configure() {
	# If there's a file called <arch>-dotconfig, use it to
	# configure the kernel; otherwise use board defaults.
	local arch defconfig

	case "$XBPS_TARGET_MACHINE" in
		armv6*) arch=arm defconfig=bcmrpi_defconfig ;;
		armv7*) arch=arm defconfig=bcm2709_defconfig ;;
		aarch64*) arch=arm64; defconfig=bcm2711_defconfig ;;
	esac

	if [ -f "${FILESDIR}/${arch}-dotconfig-custom" ]; then
		msg_normal "Detected a custom .config file for your arch, using it.\n"
		cp -f "${FILESDIR}/${arch}-dotconfig-custom" .config
		make ${makejobs} ARCH=$arch ${_cross} oldconfig
	elif [ -f "${FILESDIR}/${arch}-dotconfig" ]; then
		msg_normal "Detected a .config file for your arch, using it.\n"
		cp -f "${FILESDIR}/${arch}-dotconfig" .config
		make ${makejobs} ARCH=$arch ${_cross} oldconfig
	else
		msg_normal "Using default configuration for your arch.\n"
		cp -f "arch/${arch}/configs/${defconfig}" .config
		make ${makejobs} ARCH=$arch ${_cross} olddefconfig
	fi

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

do_build() {
	local arch tgt

	case "$XBPS_TARGET_MACHINE" in
		armv[67]*) arch=arm; tgt=zImage ;;
		aarch64*) arch=arm64; tgt=Image.gz ;;
	esac
	export LDFLAGS=
	make ARCH=$arch ${_cross} ${makejobs} prepare
	make ARCH=$arch ${_cross} ${makejobs} ${tgt} modules dtbs
}

do_install() {
	local arch hdrdest

	case "$XBPS_TARGET_MACHINE" in
		armv[67]*) arch=arm ;;
		aarch64*) arch=arm64 ;;
	esac

	# Run depmod after compressing modules - makes depmod.sh a noop
	sed -i '2iexit 0' scripts/depmod.sh
	vmkdir usr/lib
	ln -s usr/lib/ ${DESTDIR}

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

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

	vinstall .config 644 boot config-${_kernver}
	vinstall System.map 644 boot System.map-${_kernver}

	case "$XBPS_TARGET_MACHINE" in
		armv6*) vinstall arch/${arch}/boot/zImage 644 boot kernel.img ;;
		armv7*) vinstall arch/${arch}/boot/zImage 644 boot kernel7.img ;;
		aarch64*) vinstall arch/${arch}/boot/Image.gz 644 boot kernel8.img ;;
	esac

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

	# move dtbs that ended up in /boot/broadcom
	if [ -d "${DESTDIR}/boot/broadcom" ]; then
		mv "${DESTDIR}"/boot/broadcom/*dtb "${DESTDIR}/boot"
	fi

	# Switch to /usr.
	vmkdir usr

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

	cd ${wrksrc}
	# Install required headers to build external modules
	install -Dm644 Makefile ${hdrdest}/Makefile
	install -Dm644 Kbuild ${hdrdest}/Kbuild
	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 vdso \
		math-emu media net pcmcia scsi sound trace uapi video xen dt-bindings; do
		if [ -d include/$i ]; then
			cp -a include/$i ${hdrdest}/include
		fi
	done

	cd ${wrksrc}
	mkdir -p ${hdrdest}/arch/${arch}
	cp -a arch/${arch}/include ${hdrdest}/arch/${arch}

	# needed for mv-debug
	cp scripts/sign-file "${XBPS_WRAPPERDIR}"

	# 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} ${_cross} _mrproper_scripts
		# remove host specific objects as well
		find scripts -name '*.o' -delete
	fi

	# Copy files necessary for later builds, like nvidia and vmware
	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/${arch}"
	fi
	cp -a kernel/time/timeconst.bc "${hdrdest}/kernel/time"
	cp -a kernel/bounds.c "${hdrdest}/kernel"
	mkdir -p "${hdrdest}/arch/x86/entry/syscalls"
	cp -a arch/x86/entry/syscalls/syscall_32.tbl "${hdrdest}/arch/x86/entry/syscalls"

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

	# add headers for lirc package
	# pci
	for i in bt8xx cx88 saa7134; do
		mkdir -p ${hdrdest}/drivers/media/pci/${i}
		cp -a drivers/media/pci/${i}/*.h ${hdrdest}/drivers/media/pci/${i}
	done
	# usb
	for i in em28xx pwc; do
		mkdir -p ${hdrdest}/drivers/media/usb/${i}
		cp -a drivers/media/usb/${i}/*.h ${hdrdest}/drivers/media/usb/${i}
	done
	# i2c
	mkdir -p ${hdrdest}/drivers/media/i2c
	cp drivers/media/i2c/*.h ${hdrdest}/drivers/media/i2c
	for i in cx25840; do
		mkdir -p ${hdrdest}/drivers/media/i2c/${i}
		cp -a drivers/media/i2c/${i}/*.h ${hdrdest}/drivers/media/i2c/${i}
	done

	# 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 http://mcentral.de/hg/~mrec/em28xx-new
	mkdir -p ${hdrdest}/drivers/media/dvb-frontends
	cp drivers/media/dvb-frontends/lgdt330x.h \
		${hdrdest}/drivers/media/dvb-frontends/
	cp drivers/media/i2c/msp3400-driver.h ${hdrdest}/drivers/media/i2c/

	# add dvb headers
	mkdir -p ${hdrdest}/drivers/media/usb/dvb-usb
	cp drivers/media/usb/dvb-usb/*.h ${hdrdest}/drivers/media/usb/dvb-usb/
	mkdir -p ${hdrdest}/drivers/media/dvb-frontends
	cp drivers/media/dvb-frontends/*.h ${hdrdest}/drivers/media/dvb-frontends/
	mkdir -p ${hdrdest}/drivers/media/tuners
	cp drivers/media/tuners/*.h ${hdrdest}/drivers/media/tuners/

	# Add xfs and shmem for aufs building
	mkdir -p ${hdrdest}/fs/xfs/libxfs
	mkdir -p ${hdrdest}/mm
	cp fs/xfs/libxfs/xfs_sb.h ${hdrdest}/fs/xfs/libxfs/xfs_sb.h

	# Extract debugging symbols and compress modules
	msg_normal "$pkgver: extracting debug info and compressing modules, please wait...\n"
	install -Dm644 vmlinux ${DESTDIR}/usr/lib/debug/boot/vmlinux-${_kernver}
	(
	cd ${DESTDIR}
	export DESTDIR
	export SIGN_FILE="${XBPS_WRAPPERDIR}/sign-file sha512 ${wrksrc}/certs/signing_key.pem ${wrksrc}/certs/signing_key.x509"
	find ./ -name '*.ko' -print0 | \
		xargs -0r -n1 -P ${XBPS_MAKEJOBS} ${FILESDIR}/mv-debug
	)
	# ... and run depmod again.
	depmod -b ${DESTDIR}/usr -F System.map ${_kernver}
	rm -f ${DESTDIR}/lib
}

subpackages="rpi-kernel-headers rpi-kernel-dbg"

case "$XBPS_TARGET_MACHINE" in
	armv7l*) subpackages+=" rpi2-kernel rpi2-kernel-headers" ;;
	aarch64*) subpackages+=" rpi3-kernel rpi3-kernel-headers rpi4-kernel rpi4-kernel-headers" ;;
esac

rpi-kernel-headers_package() {
	nostrip=yes
	noverifyrdeps=yes
	noshlibprovides=yes
	short_desc+=" - source headers for 3rd party modules"
	case "$XBPS_TARGET_MACHINE" in
		aarch64*)
			provides="rpi-kernel-headers-${version}_${revision}"
			replaces="rpi5-kernel-headers>=0"
			;;
	esac
	pkg_install() {
		vmove usr/src
		vmove "usr/lib/modules/${_kernver}/build"
	}
}

rpi-kernel-dbg_package() {
	preserve=yes
	nostrip=yes
	noverifyrdeps=yes
	noshlibprovides=yes
	repository=debug
	short_desc+=" - debugging symbols"
	case "$XBPS_TARGET_MACHINE" in
		aarch64*)
			provides="rpi-kernel-dbg-${version}_${revision}"
			replaces="rpi5-kernel-dbg>=0"
			;;
	esac
	pkg_install() {
		vmove usr/lib/debug
		vmove "boot/System.map-${_kernver}"
	}
}

# hard-code the minimum version to prevent possible issues with partial upgrades
# of legacy (split) systems
rpi2-kernel_package() {
	build_style=meta
	short_desc+=" (transitional dummy package)"
	depends="rpi-kernel>=5.15.68_1"
}

rpi2-kernel-headers_package() {
	build_style=meta
	short_desc="${short_desc/kernel/kernel headers} (transitional dummy package)"
	depends="rpi-kernel-headers>=5.15.68_1"
}

rpi3-kernel_package() {
	build_style=meta
	short_desc+=" (transitional dummy package)"
	depends="rpi-kernel>=5.15.68_1"
}

rpi3-kernel-headers_package() {
	build_style=meta
	short_desc="${short_desc/kernel/kernel headers} (transitional dummy package)"
	depends="rpi-kernel-headers>=5.15.68_1"
}

rpi4-kernel_package() {
	build_style=meta
	short_desc+=" (transitional dummy package)"
	depends="rpi-kernel>=5.15.68_1"
}

rpi4-kernel-headers_package() {
	build_style=meta
	short_desc="${short_desc/kernel/kernel headers} (transitional dummy package)"
	depends="rpi-kernel-headers>=5.15.68_1"
}