# Template file for 'beaglebone-kernel'
#
_bonever=bone68

pkgname=beaglebone-kernel
version=3.8.13
revision=1
maintainer="Juan RP <xtraeme@voidlinux.eu>"
homepage="http://www.kernel.org"
license="GPL-2"
short_desc="Linux kernel for the BeagleBone (${version%.*} series)"
distfiles="
 http://www.kernel.org/pub/linux/kernel/v3.x/linux-${version}.tar.xz
 http://rcn-ee.net/deb/sid-armhf/v${version}-${_bonever}/patch-${version}-${_bonever}.diff.gz"
checksum="
 7cd135cc1791680553cc40bf23ce11ab24b84a3ece33d810950e089090d4f65f
 5513a392ce87c8878d5a304cfda2d9f3753e01d5aefc1d47868de6350a2015bb"

create_wrksrc=yes
build_wrksrc="linux-${version}"
_kernver="${version}_${revision}"

nostrip=yes
noverifyrdeps=yes
only_for_archs="armv7l armv7l-musl"
hostmakedepends="git perl kmod uboot-mkimage libressl bc"
makedepends="ncurses-devel"
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"

pre_configure() {
	git apply ${wrksrc}/patch-${version}-${_bonever}.diff
}
do_configure() {
	if [ "$CROSS_BUILD" ]; then
		_args="CROSS_COMPILE=${XBPS_CROSS_TRIPLET}-"
	fi

	unset LDFLAGS
	if [ -f ${FILESDIR}/config ]; then
		cp ${FILESDIR}/config .config
		make ${makejobs} ${_args} ARCH=arm oldconfig
	else
		# Use upstream default configuration, too huge!
		make ${makejobs} ${_args} ARCH=arm multi_v7_defconfig
	fi

	# Always use our revision to CONFIG_LOCALVERSION to match our pkg version.
	sed -i -e "s|^\(CONFIG_LOCALVERSION=\).*|\1\"_${revision}\"|" .config
}
do_build() {
	if [ "$CROSS_BUILD" ]; then
		_args="CROSS_COMPILE=${XBPS_CROSS_TRIPLET}-"
	fi
	unset LDFLAGS
	make ${makejobs} ${_args} ARCH=arm prepare
	make ${makejobs} ${_args} ARCH=arm zImage modules dtbs
}
do_install() {
	local hdrdest

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

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

	vmkdir boot/dtbs
	vinstall arch/arm/boot/zImage 644 boot
	cp arch/arm/boot/dts/*.dtb ${DESTDIR}/boot/dtbs

	hdrdest=${DESTDIR}/usr/src/${sourcepkg}-kernel-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 ${wrksrc}/${build_wrksrc}

	# Remove firmware stuff provided by the "linux-firmware" pkg.
	rm -rf ${DESTDIR}/usr/lib/firmware/*
	# copy beaglebone cape dtbo's
	cp firmware/*.dtbo ${DESTDIR}/usr/lib/firmware

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

	# Copy files necessary for later builds.
	cp Module.symvers ${hdrdest}
	cp -a scripts ${hdrdest}

	# fix permissions on scripts dir
	chmod og-w -R ${hdrdest}/scripts

	# copy arch includes for external modules
	mkdir -p ${hdrdest}/arch/arm/mach-omap2
	mkdir -p ${hdrdest}/arch/arm/plat-omap

	cp -a arch/arm/include ${hdrdest}/arch/arm
	cp -a arch/arm/mach-omap2/include ${hdrdest}/arch/arm/mach-omap2
	cp -a arch/arm/plat-omap/include ${hdrdest}/arch/arm/plat-omap

	mkdir -p ${hdrdest}/arch/arm/kernel

	cp arch/arm/Makefile ${hdrdest}/arch/arm
	if [ "$MACHINE_ARCH" = "i686" ]; then
		cp arch/arm/Makefile_32.cpu ${hdrdest}/arch/arm
	fi
	cp arch/arm/kernel/asm-offsets.s ${hdrdest}/arch/arm/kernel

	# Add docbook makefile
	install -Dm644 Documentation/DocBook/Makefile \
		${hdrdest}/Documentation/DocBook/Makefile

	# 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/

	# Copy in Kconfig files
	for i in $(find . -name "Kconfig*"); do
		mkdir -p ${hdrdest}/$(echo $i | sed 's|/Kconfig.*||')
		cp $i ${hdrdest}/$i
	done

	# Remove unneeded architectures
	for arch in alpha arm26 avr32 blackfin cris frv h8300 \
		ia64 m* p* s* um v850 x86 xtensa; do
		rm -rf ${hdrdest}/arch/${arch}
	done

	# 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' -exec gzip -9 {} \;

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

beaglebone-kernel-headers_package() {
	nostrip=yes
	noverifyrdeps=yes
	short_desc="Linux kernel headers for the BeagleBone (${version%.*} series)"
	pkg_install() {
		vmove usr/src
		vmove usr/lib/modules/${_kernver}/build
	}
}