# Maintainer:  Chris Severance aur.severach aATt spamgourmet dott com

# Parallel support is not installed.
# It seems to take the place of the built in parallel port which could be problematic.
# Their install doesn't install it so they don't seem too serious about it.

_opt_DKMS=1           # This can be toggled between installs

# ls -l /dev/ttyF[0-9]*
# lsmod | grep -i ax99100
# lspci -v | grep -B7 -i ax99100

# dmesg | grep -A8 -i ax99100
#[    8.392019] ASIX AX99100 PCIe Bridg to Serial Port:v1.2.0 Arch Linux    http://www.asix.com.tw
#[    8.392096] 0000:03:00.0: ttyF0 at I/O 0xd010 (irq = 16, base_baud = 115200) is a ax99100
#[    8.424126] ASIX AX99100 PCIe Bridg to Serial Port:v1.2.0 Arch Linux    http://www.asix.com.tw
#[    8.424186] 0000:03:00.1: ttyF1 at I/O 0xd000 (irq = 17, base_baud = 115200) is a ax99100

_modulename='ax99100'

set -u
pkgname="asix-${_modulename,,}"
#pkgver='1.6.0'; _dl='529'
#pkgver='1.7.0'; _dl='1162'
#pkgver='1.8.0'; _dl='1229'
pkgver='1.9.0'; _dl='1484'
pkgrel='1'
pkgdesc='kernel module driver for Asix serial RS-232 port'
arch=('i686' 'x86_64')
url='https://www.asix.com.tw/'
license=('GPL')
makedepends=('gzip' 'findutils' 'sed' 'diffutils' 'patch')
#backup=("etc/modprobe.d/${_modulename}.conf")
install="${pkgname}-install.sh"
_srcdir="AX99100_SP_PP_SPI_Linux_Driver_v${pkgver}_Source"
source=("${_srcdir}.tar.bz2::https://www.asix.com.tw/en/support/download/file/${_dl}")
source+=(
  '0000-ax99100_sp.c-ch.patch'
  '0001-kernel.5.12.MODULE_SUPPORTED_DEVICE.patch'
  '0002-kernel-5.18-pci_free_consistent-pci_alloc_consistent.patch'
  '0003-kernel-6.0-set_termios-const-ktermios.patch'
  '0004-kernel-6.2-class-const-devnode.patch'
  '0005-kernel-6.4-DEFINE_SEMAPHORE-2arg.patch'
)
md5sums=('470e66014d444276bd228e27f44fc7b5'
         'e992800dddd65a174ac531448e3f1498'
         'ab3d71682ad549eb51ae8a13aa90efc5'
         '8bf51364274f661b3f88fafb23b61f87'
         'e3ae65a199f4bdc7153fb73f60fd9ea0'
         '3827ba41339a6ad65089287df11a5726'
         '211906a3d015a4c16f6ec52d0e5f3b23')
sha256sums=('9855e6e7e3775e5849220bc12fbc0c00120016cee123f6200f31b03251959559'
            '158c5a5118e9f7b109276c0639e507ad0471468cef18ebc0a1103bdf96cd2d36'
            '86b91328ed6b596aaa441aea448e6f7fb833a447483b44e869cfbf8286810e54'
            'be4b1bf9b404b6704002e6d6866af42bb69bda487f5ad063e575a374192969d5'
            '58cf6c6dee888be410ba208e694199548093632a5a7dc0feaec08b3ca3cffc1b'
            '5caab8b025c64e55e92c2ff0750ec8fa7bec5d3b80c4743f1c218bc90f933211'
            '9fbec377d027e64185a58d450e319956a4b26cb74ac8f971eb4c6dc61e4316a1')
noextract=("${source[0]%%:*}")

if [ "${_opt_DKMS}" -ne 0 ]; then
  depends+=('linux' 'dkms' 'linux-headers')
else
  makedepends+=('linux-headers')
fi

# We can't modify .install but we can stop and force the user to fix it.
_install_check() {
  local _ckvar
  local _ckline
  local _pkgname="${pkgname}"
  for _ckvar in '_pkgname' '_modulename'; do
    _ckline="${_ckvar}='${!_ckvar}'"
    if ! grep -q "^${_ckline}"'$' "${startdir}/${install}"; then
      msg "${install} must be fixed"
      echo "${_ckline}"
      set +u
      false
    fi
  done
}

prepare() {
  set -u
  _install_check
  if [ ! -d "${_srcdir}" ]; then
    mkdir "${_srcdir}"
    bsdtar -C "${_srcdir}" -xf "${_srcdir}.tar.bz2"
  fi
  cd "${_srcdir}"

  rm -rf '.git'
  rm -f 'ax99100' # Current kernels automatically load the driver

  #sed -e 's:\r$::g' -i $(grep -l $'\r$' *)

  if [ "$(vercmp "${pkgver}" '1.7.0')" -ne 0 ] && [ "$(vercmp "${pkgver}" '1.8.0')" -lt 0 ]; then
    # diff -pNau5 ax99100_sp.c{.orig,} > '0000-ax99100_sp.c-ch.patch'
    patch -Nup0 -i "${srcdir}/0000-ax99100_sp.c-ch.patch"
  fi

  if [ "$(vercmp "${pkgver}" '1.8.0')" -lt 0 ]; then
    # diff -pNau5 ax99100_sp.c{.orig,} > '0001-kernel.5.12.MODULE_SUPPORTED_DEVICE.patch'
    patch -Nup0 -i "${srcdir}/0001-kernel.5.12.MODULE_SUPPORTED_DEVICE.patch"
  fi

  if [ "$(vercmp "${pkgver}" '1.9.0')" -lt 0 ]; then
    #cd '..'; cp -pr "${_srcdir}" 'a'; ln -s "${_srcdir}" 'b'; false
    # diff -pNaru5 'a' 'b' > '0002-kernel-5.18-pci_free_consistent-pci_alloc_consistent.patch'
    patch -Nup1 -i "${srcdir}/0002-kernel-5.18-pci_free_consistent-pci_alloc_consistent.patch"
  fi

  if [ "$(vercmp "${pkgver}" '1.9.0')" -lt 0 ]; then
    # https://lore.kernel.org/linux-arm-kernel/20220816115739.10928-9-ilpo.jarvinen@linux.intel.com/T/
    #cd '..'; cp -pr "${_srcdir}" 'a'; ln -s "${_srcdir}" 'b'; false
    # diff -pNaru5 'a' 'b' > '0003-kernel-6.0-set_termios-const-ktermios.patch'
    patch -Nup1 -i "${srcdir}/0003-kernel-6.0-set_termios-const-ktermios.patch"
  fi

    #cd '..'; cp -pr "${_srcdir}" 'a'; ln -s "${_srcdir}" 'b'; false
    # diff -pNaru5 'a' 'b' > '0004-kernel-6.2-class-const-devnode.patch'
    patch -Nup1 -i "${srcdir}/0004-kernel-6.2-class-const-devnode.patch"

    #cd '..'; cp -pr "${_srcdir}" 'a'; ln -s "${_srcdir}" 'b'; false
    # diff -pNaru5 'a' 'b' > '0005-kernel-6.4-DEFINE_SEMAPHORE-2arg.patch'
    patch -Nup1 -i "${srcdir}/0005-kernel-6.4-DEFINE_SEMAPHORE-2arg.patch"

  # Make package and DKMS compatible
  # cp -p 'Makefile' 'Makefile.Arch'
  sed -e 's:\s\+$::g '\
      -e 's:/lib/:/usr/lib/:g' \
      -e '# Double space slop' \
      -e 's:  : :g' \
      -e '# Fix all MDIR' \
      -e 's:^\(MDIR\)=.*$:\1=kernel/drivers/tty/serial:g' \
      -e '# RM isnt set anywhere so why use it? This isnt appropriate for packaging' \
      -e 's:^\t\$(RM):#&:g' \
      -e 's:^RM_PATH:#&:g' \
      -e '# Disable all clean items to use built in clean' \
      -e '/^clean:/,/^$/ s:^\t:#&:g' \
      -e 's@^clean:@&\n\t$(MAKE) -C $(KDIR) M=$(PWD) clean@g' \
      -e '/spi_test/ s:^#\trm:\trm:g' \
      -e '# Fix paths for package:g' \
      -e '/^install:/,/^$/ s:/usr/:"$(DESTDIR)"&:g' \
      -e '/^install:/,/^$/ s:/etc/:"$(DESTDIR)"&:g' \
      -e '/ln -s/ s:"$(DESTDIR)"::' \
      -e '# default does too much' \
      -e '/^default:/,/^$/ s:^\s\+rm:#&:g' \
      -e '# might as well remove all remaining install lines' \
      -e '/^install:/,/^$/ s:^[\ta-z]:#&:g' \
      -e 's|^#install:|install:|g' \
      -e 's:^#\(\tcp ax99100.ko\):\1:g' \
      -e '/\/kernel\// s:^\tcp :#&:g' \
      -e '# Separate utils from module' \
      -e '/select_BR\.c/ s|^|\nutils:\n|g' \
      -e '# Change default to modules and provide all target' \
      -e 's|^default:|all: modules utils\n\n&\n\nmodules:|g' \
      -e '#Disable debian stuff' \
      -e 's|\(^DEBIAN_VERSION_FILE:\)=.*$|\1=x|g' \
      -e 's|\(^DEBIAN_DISTRO:\)=.*$|\1=y|g' \
      -e '# CURRENT is not used' \
      -e 's:^CURRENT=:#&:g' \
      -e '# Should be using CFLAGS' \
      -e 's:gcc :gcc $(CFLAGS) :g' \
      -e '# $(PWD) is not calculated correctly' \
      -e 's:\$(PWD):$(shell pwd):g' \
    -i 'Makefile'
  test ! -s 'Makefile.Arch'

  # uppercase module name not matching lowercase filename is a problem
  #cp -p 'ax99100_sp.c'{,.orig}
  sed -e '/"/ s:\bAX99100\b:ax99100:g' -i 'ax99100_sp.c'

  # Branding
  if ! :; then
    # forgot to update the version
    sed -e 's:^\(#define DRV_VERSION\s\).*$:\1"'"${pkgver}"' Arch Linux":g' -i 'ax99100_sp.h'
  else
    local _vers
    _vers="$(sed -n -e 's:^#define DRV_VERSION\s"\([^"]\+\)".*$:\1:p' 'ax99100_sp.h')" # '
    if [ "${_vers}" != "${pkgver}" ]; then
      echo "Version mismatch ${_vers} ${pkgver}"
      set +u
      false
    fi
    sed -e '/^#define DRV_VERSION/ s:"\(.*\)":"\1 Arch Linux":g' -i 'ax99100_sp.h'
  fi

  #make -s clean
  set +u
}

build() {
  set -u
  cd "${_srcdir}"
  make -s -j1 # too small for parallel make
  set +u
}

package() {
  set -u
  cd "${_srcdir}"
  if [ "${_opt_DKMS}" -eq 0 ]; then
    # I don't want Linux version info showing on AUR web. After a few months 'linux<0.0.0' makes it look like an out of date package.
    local _kernelversionsmall="$(uname -r)"
    _kernelversionsmall="${_kernelversionsmall%%-*}"
    _kernelversionsmall="${_kernelversionsmall%\.0}" # trim 4.0.0 -> 4.0, 4.1.0 -> 4.1
    # prevent the mksrcinfo bash emulator from getting these vars!
    eval 'conf''licts=("linux>${_kernelversionsmall}" "linux<${_kernelversionsmall}")'
    eval 'dep''ends+=("linux=${_kernelversionsmall}")'
  fi

  install -d "${pkgdir}/usr/lib/modules/$(uname -r)/kernel/drivers/tty/serial"
  make -s -j1 DESTDIR="${pkgdir}" install

  # The module is in the same folder as DKMS. Compress to a different name to prevent conflict.
  # When future versions of DKMS compress we'll stop doing this.
  find "${pkgdir}/usr/lib/modules/" -type 'f' -name '*.ko' -exec 'gzip' '-9' '{}' ';'

  # Forgot to install the binaries. Install with prefix
  local _bin
  for _bin in 'advanced_BR' 'gpio_99100' 'select_BR' 'spi_test'; do
    install -Dpm755 "${_bin}" "${pkgdir}/usr/bin/asix-${_bin}"
  done

  if [ "${_opt_DKMS}" -ne 0 ]; then
    rm -r "${pkgdir}/usr/lib/modules/"
    rmdir --ignore-fail-on-non-empty -p "${pkgdir}/usr/lib"
    local _dkms="${pkgdir}/usr/src/${pkgname}-${pkgver}"
    install -Dm644 <(cat << EOF
# Automatically generated by ${pkgname}-${pkgver} PKGBUILD from Arch Linux AUR
# https://aur.archlinux.org/

PACKAGE_NAME="${pkgname}"
PACKAGE_VERSION="${pkgver}"
AUTOINSTALL="yes"

BUILT_MODULE_NAME[0]="${_modulename}"
BUILT_MODULE_LOCATION[0]=""
# Using all processors doesn't compile this tiny module any faster.
MAKE[0]="make -j1 modules"
CLEAN[0]="make -j1 clean"
# The install version is .ko.gz. The DKMS version is .ko. No conflicts.
DEST_MODULE_LOCATION[0]="/kernel/drivers/tty/serial"
EOF
    ) "${_dkms}/dkms.conf"
    install -dm755 "${_dkms}/"
    cp -pr './' "${_dkms}/"
    pushd "${_dkms}" > /dev/null
    rm *BR* gpio* 'readme' spi* # parport* 
    popd > /dev/null
    sed -e '# Fix version checking' \
        -e '/cut -d/ s:shell uname -r:shell echo $$KERNELRELEASE:g' \
        -e '# No DKMS instructions say to do this but it works and keeps the MAKE line real simple' \
        -e 's:shell uname -r:KERNELRELEASE:g' \
        -e '# Get rid of parallel port' \
        -e '#s:^obj-m +=parport_pc.o:#&:g' \
      -i "${_dkms}/Makefile"
    make -s -C "${_dkms}/" KERNELRELEASE="$(uname -r)" clean
  fi
  set +u
}

set +u