# Maintainer: Kevin Mihelich <kevin@archlinuxarm.org>
# Maintainer: Oleg Rakhmanov <oleg@archlinuxarm.org>

buildarch=2

pkgbase=linux-kirkwood-dt
_kernelname=${pkgbase#linux}
_desc="Marvell Kirkwood DT"
pkgver=4.8.13
srcver=${pkgver%.0}
pkgrel=1
cryptodev_commit=f116a93224fc7b85f83d2c53f565f8fd86165ecc
bfqver=v8r4

### BFQ patch kernel version
bfqkern=${pkgver:0:3}
# bfqkern=4.7

### AUFS branch name
aufsbranch="aufs${pkgver:0:3}"
# aufsbranch="aufs4.x-rcN"

arch=('arm')
url="http://www.kernel.org/"
license=('GPL2')
makedepends=('xmlto' 'docbook-xsl' 'uboot-mkimage' 'kmod' 'inetutils' 'bc' 'git')
options=('!strip')

source=("https://kernel.org/pub/linux/kernel/v4.x/linux-${srcver}.tar.xz"
        'config'
        'archlinuxarm.patch'
        '0001-disable-mv643xx_eth-TSO.patch'
        "git+https://github.com/sfjro/aufs4-standalone.git#branch=${aufsbranch}"
        "cryptodev-${cryptodev_commit}.tar.gz::https://github.com/cryptodev-linux/cryptodev-linux/archive/${cryptodev_commit}.tar.gz"
        "ftp://teambelgium.net/bfq/patches/${bfqkern}.0-${bfqver}/0001-block-cgroups-kconfig-build-bits-for-BFQ-v7r11-${bfqkern}.0.patch"
        "ftp://teambelgium.net/bfq/patches/${bfqkern}.0-${bfqver}/0002-block-introduce-the-BFQ-v7r11-I-O-sched-to-be-ported.patch"
        "ftp://teambelgium.net/bfq/patches/${bfqkern}.0-${bfqver}/0003-block-bfq-add-Early-Queue-Merge-EQM-to-BFQ-v7r11-to-.patch"
        "ftp://teambelgium.net/bfq/patches/${bfqkern}.0-${bfqver}/0004-Turn-BFQ-v7r11-into-BFQ-${bfqver}-for-${bfqkern}.0.patch"
        'goflexhome_fdt.patch'
        'linux.preset')
md5sums=('3957212a90026f15a1626e67cd4995e8'
         'c9f64a2e641d88edbe8018d1620c3e86'
         'a6c6f6d930d43787117d00fc759c115b'
         '09d44b9f07abfaeaf4f688ee52034786'
         'SKIP'
         'bd52f10ced89e663d2f4d138948828fd'
         '2c03a8a60b498b4255641987756b5f03'
         'aac603e9cab20dbb0593f312f781a8c9'
         'e3f3b7eb0099942269fce9435b91d749'
         'eead07332319e7ed97822a3e1faaa2dc'
         'f5a554eefbd337e71cca072e2d2cab45'
         '959e49540dac4c5e689ad9037150a360')

prepare() {
  cd "${srcdir}/linux-${srcver}"

  msg2 "Copying aufs patches into the kernel source tree"
  cp -ru "${srcdir}/aufs4-standalone/"{Documentation,fs} "${srcdir}/linux-${srcver}/"
  cp -ru "${srcdir}/aufs4-standalone/include/uapi/linux/aufs_type.h" "${srcdir}/linux-${srcver}/include/"{linux/,uapi/linux/}

  msg2 "Applying aufs patches"
  patch -Np1 -i ../aufs4-standalone/aufs4-kbuild.patch
  patch -Np1 -i ../aufs4-standalone/aufs4-base.patch
  patch -Np1 -i ../aufs4-standalone/aufs4-mmap.patch
  patch -Np1 -i ../aufs4-standalone/aufs4-standalone.patch

  msg2 "Disable buggy TCP segmentation offload implementation"
  msg2 "http://archlinuxarm.org/forum/viewtopic.php?f=9&t=7692"
  patch -Np1 -i ${srcdir}/0001-disable-mv643xx_eth-TSO.patch

  msg2 "Add Arch Linux ARM patch for ARMv5te plug computers"
  patch -Np1 -i "${srcdir}/archlinuxarm.patch"
  patch -Np1 -i "${srcdir}/goflexhome_fdt.patch"

  msg2 "Add BFQ patches"
  patch -Np1 -i "${srcdir}/0001-block-cgroups-kconfig-build-bits-for-BFQ-v7r11-${bfqkern}.0.patch"
  patch -Np1 -i "${srcdir}/0002-block-introduce-the-BFQ-v7r11-I-O-sched-to-be-ported.patch"
  patch -Np1 -i "${srcdir}/0003-block-bfq-add-Early-Queue-Merge-EQM-to-BFQ-v7r11-to-.patch"
  patch -Np1 -i "${srcdir}/0004-Turn-BFQ-v7r11-into-BFQ-${bfqver}-for-${bfqkern}.0.patch"

  cat "${srcdir}/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
}

build() {
  cd "${srcdir}/linux-${srcver}"

  # 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

  msg "Building!"
  make ${MAKEFLAGS} zImage modules dtbs kirkwood-nsa320.dtb kirkwood-nsa325.dtb

  msg "Building cryptodev module"
  cd "${srcdir}/cryptodev-linux-${cryptodev_commit}"
  make KERNEL_DIR="${srcdir}/linux-${srcver}"
}

_package() {
  pkgdesc="The Linux Kernel and modules - ${_desc}"
  depends=('coreutils' 'linux-firmware' 'kmod' 'mkinitcpio>=0.7')
  optdepends=('crda: to set the correct wireless channels of your country')
  provides=('kernel26' 'linux=${pkgver}' 'aufs_friendly' 'cryptodev_friendly')
  conflicts=('linux-kirkwood' 'linux' 'linux-olinuxino')
  backup=("etc/mkinitcpio.d/${pkgbase}.preset")
  install=${pkgname}.install

  cd "${srcdir}/linux-${srcver}"

  KARCH=arm

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

  mkdir -p "${pkgdir}"/{lib/modules,lib/firmware,boot/dtbs}
  make INSTALL_MOD_PATH="${pkgdir}" modules_install
  cp arch/$KARCH/boot/zImage "${pkgdir}/boot/zImage"
  cp arch/$KARCH/boot/dts/*.dtb "${pkgdir}/boot/dtbs"

  # 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"

  # install mkinitcpio preset file for kernel
  install -D -m644 "${srcdir}/linux.preset" "${pkgdir}/etc/mkinitcpio.d/${pkgbase}.preset"
  sed \
    -e "1s|'linux.*'|'${pkgbase}'|" \
    -e "s|ALL_kver=.*|ALL_kver=\"${_kernver}\"|" \
    -i "${pkgdir}/etc/mkinitcpio.d/${pkgbase}.preset"

  # 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"

  # install cryptodev module
  cd "${srcdir}/cryptodev-linux-${cryptodev_commit}"
  make -C "${srcdir}/linux-${srcver}" INSTALL_MOD_PATH="${pkgdir}" SUBDIRS=`pwd` modules_install

  cd "${srcdir}/linux-${srcver}"

  # 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"
}

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

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

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

  cd "${srcdir}/linux-${srcver}"
  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 uapi 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/$KARCH/plat-orion
  cp -a arch/$KARCH/plat-orion/include ${pkgdir}/usr/src/linux-${_kernver}/arch/$KARCH/plat-orion/

  # 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}/"

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

  # add headers for lirc package
  # pci
  for i in bt8xx cx88 saa7134; do
    mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/pci/${i}"
    cp -a drivers/media/pci/${i}/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/pci/${i}"
  done
  # usb
  for i in cpia2 em28xx pwc; do
    mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/usb/${i}"
    cp -a drivers/media/usb/${i}/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/usb/${i}"
  done
  # i2c
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/i2c"
  cp drivers/media/i2c/*.h  "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/i2c/"
  for i in cx25840; do
    mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/i2c/${i}"
    cp -a drivers/media/i2c/${i}/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/i2c/${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-core"
  cp drivers/media/dvb-core/*.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb-core/"
  # and...
  # http://bugs.archlinux.org/task/11194
  mkdir -p "${pkgdir}/usr/src/linux-${_kernver}/include/config/dvb/"
  cp include/config/dvb/*.h "${pkgdir}/usr/src/linux-${_kernver}/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 "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb-frontends/"
  cp drivers/media/dvb-frontends/lgdt330x.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/dvb-frontends/"
  cp drivers/media/i2c/msp3400-driver.h "${pkgdir}/usr/src/linux-${_kernver}/drivers/media/i2c/"

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

  # 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}

  # install cryptodev header
  cd "${srcdir}/cryptodev-linux-${cryptodev_commit}"
  install -D crypto/cryptodev.h "${pkgdir}/usr/src/linux-${_kernver}/crypto/cryptodev.h"
}

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