# Maintainer: stratum nine <strata@dropswitch.net>

buildarch=4

pkgbase=linux-chromebook
pkgname=('linux-chromebook' 'linux-headers-chromebook')
pkgver=20130312
_kernelname=${pkgname#linux}
_basever=3.4
pkgrel=1
pkgdesc="Chromium OS kernel with ArchLinux ARM tweaks for SAMSUNG ARM Chromebook."
arch=('armv7h')
url="http://git.chromium.org/gitweb/?p=chromiumos/third_party/kernel.git;a=summary"
license=('GPL2')
makedepends=('uboot-mkimage' 'dtc' 'git')
source=('change-default-console-loglevel.patch'
	'config.exynos5'
	'kernel.its')
md5sums=('b92685a88e9784b3b7c609894ee8b5da'
	'd7597be81fabb200501431fc0c05e7db'
	'1ee7e0f62516ba3af19022c25636011c')

_gitroot='https://git.chromium.org/git/chromiumos/third_party/kernel.git'
_gitname='chromeos-3.4'
_gitbranch='chromeos-3.4'

build() {
  cd "$srcdir"
  msg "Connecting to GIT server...."

  if [[ -d "$_gitname" ]]; then
    cd "$_gitname" && git pull origin
    msg "The local files are updated."
  else
    git clone "$_gitroot" "$_gitname"
	cd "$_gitname"
	git checkout "$_gitbranch"
  fi

  msg "GIT checkout done or server timeout"
  msg "Starting build..."

  rm -rf "$srcdir/${_gitname}-build"
  git clone "$srcdir/$_gitname" "$srcdir/${_gitname}-build"
  cd "$srcdir/${_gitname}-build"

  # set DEFAULT_CONSOLE_LOGLEVEL to 4 (same value as the 'quiet' kernel param)
  # remove this when a Kconfig knob is made available by upstream
  # (relevant patch sent upstream: https://lkml.org/lkml/2011/7/26/227) 
  patch -Np1 -i "${srcdir}/change-default-console-loglevel.patch"

  # Kernel configuration
  cp "${srcdir}/config.exynos5" .config 

  msg "Get kernel version ..."
  make prepare
 
  msg "Building kernel and modules ..."
  make uImage modules

  msg "Creating .dtb's ..."
  make dtbs

  msg "Creating FIT image for nv-U-boot ..."
  cp "${srcdir}/kernel.its" arch/arm/boot/kernel.its
  cd arch/arm/boot
  mkimage -f kernel.its zImage
  cp -v zImage vmlinux.uimg
}

package_linux-chromebook() {
  pkgdesc="The Linux Kernel and modules - SAMSUNG ARM Chromebook kernel and modules"
  depends=('coreutils' 'linux-firmware' 'module-init-tools>=3.16')
  optdepends=('crda: to set the correct wireless channels of your country')
  provides=('linux26' "linux=${pkgver}")
  install=${pkgname}.install

  cd "${srcdir}/${_gitname}-build"

  KARCH=arm

  # get kernel version
  _kernver="$(make kernelrelease)"

  mkdir -p "${pkgdir}"/{lib/modules,lib/firmware,boot}
  make INSTALL_MOD_PATH="${pkgdir}" modules_install
  cp arch/arm/boot/vmlinux.uimg "${pkgdir}/boot/vmlinux.uimg"

  # set correct depmod command for install
  sed \
    -e "s/KERNEL_NAME=.*/KERNEL_NAME=${_kernelname}/g" \
    -e "s/KERNEL_VERSION=.*/KERNEL_VERSION=${_kernver}/g" \
    -i "${startdir}/${pkgname}.install"

  # remove build and source links
  rm -f "${pkgdir}"/lib/modules/${_kernver}/{source,build}

  # remove the firmware
  rm -rf "${pkgdir}/lib/firmware"

  # gzip -9 all modules to save 100MB of space
  find "${pkgdir}" -name '*.ko' | xargs -P 2 -n 1 gzip -9

  # add real version for building modules and running depmod from post_install/upgrade
  mkdir -p "${pkgdir}/lib/modules/extramodules-${_basever}"
  echo "${_kernver}" > "${pkgdir}/lib/modules/extramodules-${_basever}/version"

  # Now we call depmod...
  depmod -b "$pkgdir" -F System.map "$_kernver"

  # move the module tree /lib -> /usr/lib
  mkdir -p "${pkgdir}/usr"
  mv "$pkgdir/lib" "$pkgdir/usr"
}

package_linux-headers-chromebook() {
  pkgdesc="Header files and scripts for building modules for linux kernel - SAMSUNG ARM Chromebook"
  provides=("linux-headers=${pkgver}")
  conflicts=('linux-headers-omap' 'linux-headers-trimslice')

  install -dm755 "${pkgdir}/usr/lib/modules/${_kernver}"

  cd "${pkgdir}/usr/lib/modules/${_kernver}"
  ln -sf ../../../src/linux-${_kernver} build

  cd "${srcdir}/${_gitname}-build"
  install -D -m644 Makefile \
    "${pkgdir}/usr/src/linux-${_kernver}/Makefile"
  install -D -m644 kernel/Makefile \
    "${pkgdir}/usr/src/linux-${_kernver}/kernel/Makefile"
  install -D -m644 .config \
    "${pkgdir}/usr/src/linux-${_kernver}/.config"

  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/include"

  for i in acpi asm-generic config crypto drm generated linux math-emu \
    media net pcmcia scsi sound trace video xen; do
    cp -a include/${i} "${pkgdir}/usr/src/linux-${_kernver}/include/"
  done

  # copy arch includes for external modules
  mkdir -p ${pkgdir}/usr/src/linux-${_kernver}/arch/$KARCH
  cp -a arch/$KARCH/include ${pkgdir}/usr/src/linux-${_kernver}/arch/$KARCH/
  mkdir -p ${pkgdir}/usr/src/linux-${_kernver}/arch/$KARCH/mach-exynos
  cp -a arch/$KARCH/mach-exynos/include ${pkgdir}/usr/src/linux-${_kernver}/arch/$KARCH/mach-exynos/
  mkdir -p ${pkgdir}/usr/src/linux-${_kernver}/arch/$KARCH/plat-samsung
  cp -a arch/$KARCH/plat-samsung/include ${pkgdir}/usr/src/linux-${_kernver}/arch/$KARCH/plat-samsung/

  # copy files necessary for later builds, like nvidia and vmware
  cp Module.symvers "${pkgdir}/usr/src/linux-${_kernver}"
  cp -a scripts "${pkgdir}/usr/src/linux-${_kernver}"

  # fix permissions on scripts dir
  chmod og-w -R "${pkgdir}/usr/src/linux-${_kernver}/scripts"
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/.tmp_versions"

  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/arch/${KARCH}/kernel"

  cp arch/${KARCH}/Makefile "${pkgdir}/usr/src/linux-${_kernver}/arch/${KARCH}/"

  if [ "${CARCH}" = "i686" ]; then
    cp arch/${KARCH}/Makefile_32.cpu "${pkgdir}/usr/src/linux-${_kernver}/arch/${KARCH}/"
  fi

  cp arch/${KARCH}/kernel/asm-offsets.s "${pkgdir}/usr/src/linux-${_kernver}/arch/${KARCH}/kernel/"

  # add headers for lirc package
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/video"

  cp drivers/media/video/*.h  "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/video/"

  for i in bt8xx cpia2 cx25840 cx88 em28xx et61x251 pwc saa7134 sn9c102; do
    mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/video/${i}"
    cp -a drivers/media/video/${i}/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/video/${i}"
  done

  # add docbook makefile
  install -D -m644 Documentation/DocBook/Makefile \
    "${pkgdir}/usr/src/linux-${_kernver}/Documentation/DocBook/Makefile"

  # add dm headers
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/md"
  cp drivers/md/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/md"

  # add inotify.h
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/include/linux"
  cp include/linux/inotify.h "${pkgdir}/usr/src/linux-${_kernver}/include/linux/"

  # add wireless headers
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/net/mac80211/"
  cp net/mac80211/*.h "${pkgdir}/usr/src/linux-${_kernver}/net/mac80211/"

  # add dvb headers for external modules
  # in reference to:
  # http://bugs.archlinux.org/task/9912
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/dvb-core"
  cp drivers/media/dvb/dvb-core/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/dvb-core/"

# add dvb headers for http://mcentral.de/hg/~mrec/em28xx-new
  # in reference to:
  # http://bugs.archlinux.org/task/13146
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/frontends/"
  cp drivers/media/dvb/frontends/lgdt330x.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/frontends/"
  cp drivers/media/video/msp3400-driver.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/frontends/"

  # add dvb headers
  # in reference to:
  # http://bugs.archlinux.org/task/20402
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/dvb-usb"
  cp drivers/media/dvb/dvb-usb/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/dvb-usb/"
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/frontends"
  cp drivers/media/dvb/frontends/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb/frontends/"
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/common/tuners"
  cp drivers/media/common/tuners/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/common/tuners/"

  # add xfs and shmem for aufs building
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/fs/xfs"
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/mm"
  cp fs/xfs/xfs_sb.h "${pkgdir}/usr/src/linux-${_kernver}/fs/xfs/xfs_sb.h"

  # copy in Kconfig files
  for i in `find . -name "Kconfig*"`; do
    mkdir -p "${pkgdir}"/usr/src/linux-${_kernver}/`echo ${i} | sed 's|/Kconfig.*||'`
    cp ${i} "${pkgdir}/usr/src/linux-${_kernver}/${i}"
  done

  chown -R root.root "${pkgdir}/usr/src/linux-${_kernver}"
  find "${pkgdir}/usr/src/linux-${_kernver}" -type d -exec chmod 755 {} \;

  # strip scripts directory
  find "${pkgdir}/usr/src/linux-${_kernver}/scripts" -type f -perm -u+w 2>/dev/null | while read binary ; do
    case "$(file -bi "${binary}")" in
      *application/x-sharedlib*) # Libraries (.so)
        /usr/bin/strip ${STRIP_SHARED} "${binary}";;
      *application/x-archive*) # Libraries (.a)
        /usr/bin/strip ${STRIP_STATIC} "${binary}";;
      *application/x-executable*) # Binaries
        /usr/bin/strip ${STRIP_BINARIES} "${binary}";;
    esac
  done

  # remove unneeded architectures
  rm -rf "${pkgdir}"/usr/src/linux-${_kernver}/arch/{alpha,arm26,avr32,blackfin,cris,frv,h8300,ia64,m32r,m68k,m68knommu,mips,microblaze,mn10300,parisc,powerpc,ppc,s390,sh,sh64,sparc,sparc64,um,v850,x86,xtensa}
}