# ChromiumOS kernel for Veyron Chromebooks
# Maintainer: Kevin Mihelich <kevin@archlinuxarm.org>

buildarch=4

pkgbase=linux-veyron
_kernelname=${pkgbase#linux}
_desc="Veyron Chromebooks"
pkgver=3.14.0
pkgrel=26
_commit=8c3348722d05cdc134aeeb2bb1da63f6992b8bfe
arch=('armv7h')
url="https://chromium.googlesource.com/chromiumos/third_party/kernel/+/chromeos-3.14"
license=('GPL2')
makedepends=('xmlto' 'docbook-xsl' 'kmod' 'inetutils' 'bc' 'git' 'uboot-tools' 'vboot-utils' 'dtc')
options=('!strip')
source=("https://chromium.googlesource.com/chromiumos/third_party/kernel/+archive/${_commit}.tar.gz"
        http://archlinuxarm.org/builder/src/veyron/sd{8787,8797,8897}_uapsta_cros.bin
        'http://archlinuxarm.org/builder/src/veyron/BCM4354_003.001.012.0306.0659.hcd'
        '0001-use-chromiumos-mwifiex-drivers.patch'
        '0002-mwifiex-do-not-create-AP-and-P2P-interfaces-upon-dri.patch'
        '0003-UPSTREAM-soc-rockchip-add-handler-for-usb-uart-funct.patch'
        '0004-fix-brcmfmac-oops-and-race-condition.patch'
        '0005-random-simplify-loop-in-random_read.patch'
        '0006-random-introduce-getrandom-2-system-call.patch'
        '0007-ARM-wire-up-getrandom-syscall.patch'
        '0008-random-Wake-up-all-getrandom-2-callers-when-pool-is-.patch'
        'config'
        'kernel.its'
        'kernel.keyblock'
        'kernel_data_key.vbprivk'
        'cmdline'
        'brcmfmac4354-sdio.txt'
        '99-veyron-brcm.rules')
md5sums=('07393e20ea7ea48ba7dab52e57620a04'
         'bda543cb5943eac34e16d12911f3ee99'
         '5e2d7cd74de07d13052de99411c13a2f'
         '1534c1dbfe5df35a5634072f7b912840'
         '20f8931f3795e5226829d48c3d470334'
         '7457f68b1ed40592f0057a9e3d5e546c'
         '78efe11e59a48fe1576f195e9fe27e92'
         '0a6e16818f4f1294b4d7bebad952c46f'
         'f4e19254d5d8e4b427134e535c728186'
         '997b5f5e7cafc3547888fc82b40d5d01'
         '7c5c670779e324f1ce9286f7cd605160'
         '21cde62bbc6dc0e9dd1b3f6771a1438d'
         '605c38eb7c016d8283db3d3801067202'
         '9aac49e2baa96444f9314d02035a90a7'
         '761d2e8cef38584b9e2f478e8096e458'
         '61c5ff73c136ed07a7aadbf58db3d96a'
         '584777ae88bce2c5659960151b64c7d8'
         'e3bdf63d5d936fb982c4cd62da1433ad'
         '97297f16115fb38e157bdc3a4527252d'
         'cd779bcbe50e6562428279ff7e5b0cd9')

prepare() {
  git apply 0001-use-chromiumos-mwifiex-drivers.patch
  git apply 0002-mwifiex-do-not-create-AP-and-P2P-interfaces-upon-dri.patch
  git apply 0003-UPSTREAM-soc-rockchip-add-handler-for-usb-uart-funct.patch
  git apply 0004-fix-brcmfmac-oops-and-race-condition.patch
  git apply 0005-random-simplify-loop-in-random_read.patch
  git apply 0006-random-introduce-getrandom-2-system-call.patch
  git apply 0007-ARM-wire-up-getrandom-syscall.patch
  git apply 0008-random-Wake-up-all-getrandom-2-callers-when-pool-is-.patch

  cp config .config

  # add pkgrel to extraversion
  sed -ri "s|^(EXTRAVERSION =)(.*)|\1 \2-${pkgrel}|" Makefile

  # don't run depmod on 'make install'. We'll do this ourselves in packaging
  sed -i '2iexit 0' scripts/depmod.sh

  export WIFIVERSION=-3.8

  cp include/linux/compiler-gcc5.h include/linux/compiler-gcc6.h
  cp include/linux/compiler-gcc5.h include/linux/compiler-gcc7.h
}

build() {
  # get kernel version
  make prepare

  # load configuration
  # Configure the kernel. Replace the line below with one of your choice.
  #make menuconfig # CLI menu for configuration
  #make nconfig # new CLI menu for configuration
  #make xconfig # X-based configuration
  #make oldconfig # using old config from previous kernel version
  # ... or manually edit .config

  # Copy back our configuration (use with new kernel version)
  #cp ./.config ../${pkgbase}.config

  ####################
  # stop here
  # this is useful to configure the kernel
  #msg "Stopping build"
  #return 1
  ####################

  #yes "" | make config

  # build!
  make ${MAKEFLAGS} zImage modules dtbs
}

_package() {
  pkgdesc="The Linux Kernel and modules - ${_desc}"
  depends=('coreutils' 'linux-firmware' 'kmod' 'brcm-patchram-plus')
  optdepends=('crda: to set the correct wireless channels of your country')
  provides=('kernel26' "linux=${pkgver}")
  conflicts=('linux')
  install=${pkgname}.install

  KARCH=arm

  # get kernel version
  _kernver="$(make kernelrelease)"
  _basekernel=${_kernver%%-*}
  _basekernel=${_basekernel%.*}

  mkdir -p "${pkgdir}"/{lib/modules,lib/firmware,boot/dtbs}
  make INSTALL_MOD_PATH="${pkgdir}" modules_install
  
  mkimage -D "-I dts -O dtb -p 2048" -f kernel.its vmlinux.uimg
  dd if=/dev/zero of=bootloader.bin bs=512 count=1
  vbutil_kernel \
    --pack vmlinux.kpart \
    --version 1 \
    --vmlinuz vmlinux.uimg \
    --arch arm \
    --keyblock kernel.keyblock \
    --signprivate kernel_data_key.vbprivk \
    --config cmdline \
    --bootloader bootloader.bin

  cp vmlinux.kpart "${pkgdir}/boot"

  # 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
  # make room for external modules
  ln -s "../extramodules-${_basekernel}-${_kernelname:-ARCH}" "${pkgdir}/lib/modules/${_kernver}/extramodules"
  # add real version for building modules and running depmod from post_install/upgrade
  mkdir -p "${pkgdir}/lib/modules/extramodules-${_basekernel}-${_kernelname:-ARCH}"
  echo "${_kernver}" > "${pkgdir}/lib/modules/extramodules-${_basekernel}-${_kernelname:-ARCH}/version"

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

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

  # install ChromeOS mwifiex firmware
  mkdir -p "${pkgdir}"/usr/lib/firmware/mrvl
  cp sd{8787,8797,8897}_uapsta_cros.bin "${pkgdir}"/usr/lib/firmware/mrvl

  # install ChromeOS brcm firmware
  mkdir -p "${pkgdir}"/usr/lib/firmware/brcm
  mkdir -p "${pkgdir}"/usr/lib/udev/rules.d
  cp BCM4354_003.001.012.0306.0659.hcd brcmfmac4354-sdio.txt "${pkgdir}"/usr/lib/firmware/brcm
  cp 99-veyron-brcm.rules "${pkgdir}"/usr/lib/udev/rules.d
}

_package-headers() {
  pkgdesc="Header files and scripts for building modules for linux kernel - ${_desc}"
  provides=("linux-headers=${pkgver}")
  conflicts=('linux-headers')

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

  install -D -m644 Makefile \
    "${pkgdir}/usr/lib/modules/${_kernver}/build/Makefile"
  install -D -m644 kernel/Makefile \
    "${pkgdir}/usr/lib/modules/${_kernver}/build/kernel/Makefile"
  install -D -m644 .config \
    "${pkgdir}/usr/lib/modules/${_kernver}/build/.config"

  mkdir -p "${pkgdir}/usr/lib/modules/${_kernver}/build/include"

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

  # copy arch includes for external modules
  mkdir -p ${pkgdir}/usr/lib/modules/${_kernver}/build/arch/$KARCH
  cp -a arch/$KARCH/include ${pkgdir}/usr/lib/modules/${_kernver}/build/arch/$KARCH/

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

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

  mkdir -p "${pkgdir}/usr/lib/modules/${_kernver}/build/arch/${KARCH}/kernel"

  cp arch/${KARCH}/Makefile "${pkgdir}/usr/lib/modules/${_kernver}/build/arch/${KARCH}/"

  cp arch/${KARCH}/kernel/asm-offsets.s "${pkgdir}/usr/lib/modules/${_kernver}/build/arch/${KARCH}/kernel/"

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

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

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

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

  # add dvb headers for external modules
  # in reference to:
  # http://bugs.archlinux.org/task/9912
  mkdir -p "${pkgdir}/usr/lib/modules/${_kernver}/build/drivers/media/dvb-core"
  cp drivers/media/dvb-core/*.h "${pkgdir}/usr/lib/modules/${_kernver}/build/drivers/media/dvb-core/"
  # and...
  # http://bugs.archlinux.org/task/11194
  mkdir -p "${pkgdir}/usr/lib/modules/${_kernver}/build/include/config/dvb/"
  cp include/config/dvb/*.h "${pkgdir}/usr/lib/modules/${_kernver}/build/include/config/dvb/"

  # add dvb headers for http://mcentral.de/hg/~mrec/em28xx-new
  # in reference to:
  # http://bugs.archlinux.org/task/13146
  mkdir -p "${pkgdir}/usr/lib/modules/${_kernver}/build/drivers/media/dvb-frontends/"
  cp drivers/media/dvb-frontends/lgdt330x.h "${pkgdir}/usr/lib/modules/${_kernver}/build/drivers/media/dvb-frontends/"
  mkdir -p "${pkgdir}/usr/lib/modules/${_kernver}/build/drivers/media/i2c/"
  cp drivers/media/i2c/msp3400-driver.h "${pkgdir}/usr/lib/modules/${_kernver}/build/drivers/media/i2c/"

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

  # add xfs and shmem for aufs building
  mkdir -p "${pkgdir}/usr/lib/modules/${_kernver}/build/fs/xfs"
  mkdir -p "${pkgdir}/usr/lib/modules/${_kernver}/build/mm"

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

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

  # strip scripts directory
  find "${pkgdir}/usr/lib/modules/${_kernver}/build/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 "${pkgdir}"/usr/lib/modules/${_kernver}/build/arch/{alpha,arc,arm26,arm64,avr32,blackfin,c6x,cris,frv,h8300,hexagon,ia64,m32r,m68k,m68knommu,metag,mips,microblaze,mn10300,openrisc,parisc,powerpc,ppc,s390,score,sh,sh64,sparc,sparc64,tile,unicore32,um,v850,x86,xtensa}
}

pkgname=("${pkgbase}" "${pkgbase}-headers")
for _p in ${pkgname[@]}; do
  eval "package_${_p}() {
    _package${_p#${pkgbase}}
  }"
done