# Maintainer: Redecorating
# Contributor: James Lambert (jamlam) <jamesl@mbert.onmicrosoft.com>
# Contributor: Aun-Ali Zaidi <admin@kodeit.net>
# Contributor: Jan Alexander Steffens (heftig) <jan.steffens@gmail.com>

pkgbase=linux-t2
pkgver=5.16.1
_srcname=linux-${pkgver}
pkgrel=1
pkgdesc='Linux kernel for T2 Macs'
_srctag=v${pkgver%.*}-${pkgver##*.}
url="https://git.archlinux.org/linux.git/log/?h=v$_srctag"
arch=(x86_64)
license=(GPL2)
makedepends=(
  bc kmod libelf pahole cpio perl tar xz
  xmlto python-sphinx python-sphinx_rtd_theme graphviz imagemagick
  git
)
options=('!strip')

source=(
  https://www.kernel.org/pub/linux/kernel/v${pkgver//.*}.x/linux-${pkgver}.tar.xz
  https://www.kernel.org/pub/linux/kernel/v${pkgver//.*}.x/linux-${pkgver}.tar.sign
  config         # the main kernel config file

  # Arch Linux patches
  0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-C.patch
  0002-HID-quirks-Add-Apple-Magic-Trackpad-2-to-hid_have_sp.patch

  # Nvram Write without panic
  0101-efi-runtime-avoid-EFIv2-runtime-services-on-Apple-x8.patch

  # apple-bce, apple-ibridge
  apple-bce::git+https://github.com/t2linux/apple-bce-drv#commit=f93c6566f98b3c95677de8010f7445fa19f75091
  apple-ibridge::git+https://github.com/t2linux/apple-ib-drv#commit=d8411ad1d87db8491e53887e36c3d37f445203eb
  1001-Put-apple-bce-and-apple-ibridge-in-drivers-staging.patch
  1002-add-modalias-to-apple-bce.patch

  # Hack for AMD DC eDP link rate bug
  2001-drm-amd-display-Force-link_rate-as-LINK_RATE_RBR2-fo.patch

  # Apple SMC ACPI support
  3001-applesmc-convert-static-structures-to-drvdata.patch
  3002-applesmc-make-io-port-base-addr-dynamic.patch
  3003-applesmc-switch-to-acpi_device-from-platform.patch
  3004-applesmc-key-interface-wrappers.patch
  3005-applesmc-basic-mmio-interface-implementation.patch
  3006-applesmc-fan-support-on-T2-Macs.patch
  3007-applesmc-Add-iMacPro-to-applesmc_whitelist.patch

  # T2 USB Keyboard/Touchpad support
  4001-HID-apple-Add-support-for-keyboard-backlight-on-supp.patch
  4002-HID-apple-Add-support-for-MacbookAir8-1-keyboard-tra.patch
  4003-HID-apple-Add-support-for-MacBookPro15-2-keyboard-tr.patch
  4004-HID-apple-Add-support-for-MacBookPro15-1-keyboard-tr.patch
  4005-HID-apple-Add-support-for-MacBookPro15-4-keyboard-tr.patch
  4006-HID-apple-Add-support-for-MacBookPro16-2-keyboard-tr.patch
  4007-HID-apple-Add-support-for-MacBookPro16-3-keyboard-tr.patch
  4008-HID-apple-Add-support-for-MacBookAir9-1-keyboard-tra.patch
  4009-HID-apple-Add-support-for-MacBookPro16-1-keyboard-tr.patch
  4010-HID-apple-Add-ability-to-use-numbers-as-function-key.patch
  
  # UVC Camera support
  6001-media-uvcvideo-Add-support-for-Apple-T2-attached-iSi.patch

  # Hack for i915 overscan issues
  7001-drm-i915-fbdev-Discard-BIOS-framebuffers-exceeding-h.patch

  # Broadcom WIFI device support
  8001-brcmfmac-pcie-Declare-missing-firmware-files-in-pcie.patch
  8002-brcmfmac-firmware-Support-having-multiple-alt-paths.patch
  8003-brcmfmac-firmware-Handle-per-board-clm_blob-files.patch
  8004-brcmfmac-pcie-sdio-usb-Get-CLM-blob-via-standard-fir.patch
  8005-brcmfmac-firmware-Support-passing-in-multiple-board_.patch
  8006-brcmfmac-pcie-Read-Apple-OTP-information.patch
  8007-brcmfmac-of-Fetch-Apple-properties.patch
  8008-brcmfmac-pcie-Perform-firmware-selection-for-Apple-p.patch
  8009-brcmfmac-firmware-Allow-platform-to-override-macaddr.patch
  8010-brcmfmac-msgbuf-Increase-RX-ring-sizes-to-1024.patch
  8011-brcmfmac-pcie-Fix-crashes-due-to-early-IRQs.patch
  8012-brcmfmac-pcie-Support-PCIe-core-revisions-64.patch
  8013-brcmfmac-pcie-Add-IDs-properties-for-BCM4378.patch
  8014-ACPI-property-Support-strings-in-Apple-_DSM-props.patch
  8015-brcmfmac-acpi-Add-support-for-fetching-Apple-ACPI-pr.patch
  8016-brcmfmac-pcie-Provide-a-buffer-of-random-bytes-to-th.patch
  8017-brcmfmac-pcie-Add-IDs-properties-for-BCM4355.patch
  8018-brcmfmac-pcie-Add-IDs-properties-for-BCM4377.patch
  8019-brcmfmac-pcie-Perform-correct-BCM4364-firmware-selec.patch
  8020-brcmfmac-chip-Only-disable-D11-cores-handle-an-arbit.patch
  8021-brcmfmac-chip-Handle-1024-unit-sizes-for-TCM-blocks.patch
  8022-brcmfmac-cfg80211-Add-support-for-scan-params-v2.patch
  8023-brcmfmac-feature-Add-support-for-setting-feats-based.patch
  8024-brcmfmac-cfg80211-Add-support-for-PMKID_V3-operation.patch
  8025-brcmfmac-cfg80211-Pass-the-PMK-in-binary-instead-of-.patch
  8026-brcmfmac-pcie-Add-IDs-properties-for-BCM4387.patch
  8027-brcmfmac-pcie-Replace-brcmf_pcie_copy_mem_todev-with.patch
  8028-brcmfmac-pcie-Read-the-console-on-init-and-shutdown.patch
  8029-brcmfmac-pcie-Release-firmwares-in-the-brcmf_pcie_se.patch
  # 8030 only applies to the linux-asahi tree and is only for M1 Macs
  8031-brcmfmac-fwil-Constify-iovar-name-arguments.patch
  8032-brcmfmac-common-Add-support-for-downloading-TxCap-bl.patch
  8033-brcmfmac-pcie-Load-and-provide-TxCap-blobs.patch
  8034-brcmfmac-common-Add-support-for-external-calibration.patch

)

validpgpkeys=(
  'ABAF11C65A2970B130ABE3C479BE3E4300411886'  # Linus Torvalds
  '647F28654894E3BD457199BE38DBBDC86092693E'  # Greg Kroah-Hartman
)

export KBUILD_BUILD_HOST=archlinux
export KBUILD_BUILD_USER=$pkgbase
export KBUILD_BUILD_TIMESTAMP="$(date -Ru${SOURCE_DATE_EPOCH:+d @$SOURCE_DATE_EPOCH})"

prepare() {
  cd $_srcname

  echo "Setting version..."
  scripts/setlocalversion --save-scmversion
  echo "-$pkgrel" > localversion.10-pkgrel
  echo "${pkgbase#linux}" > localversion.20-pkgname

  for i in apple-bce apple-ibridge; do
    echo "Copying $i in to drivers/staging..."
	# no need to copy .git/
	mkdir drivers/staging/$i
    cp -r $srcdir/$i/* drivers/staging/$i/
  done

  local src
  for src in "${source[@]}"; do
    src="${src%%::*}"
    src="${src##*/}"
    [[ $src = *.patch ]] || continue
    echo "Applying patch $src..."
    patch -Np1 < "../$src"
  done

  echo "Setting config..."
  cp ../config .config
  make olddefconfig
  diff -u ../config .config || :

  make -s kernelrelease > version
  echo "Prepared $pkgbase version $(<version)"
}

build() {
  cd $_srcname
  make all
  make htmldocs
}

_package() {
  pkgdesc="The $pkgdesc kernel and modules"
  depends=(coreutils kmod initramfs)
  optdepends=('crda: to set the correct wireless channels of your country'
              'linux-firmware: firmware images needed for some devices')
  provides=(VIRTUALBOX-GUEST-MODULES WIREGUARD-MODULE)
  replaces=(virtualbox-guest-modules-arch wireguard-arch)

  cd $_srcname
  local kernver="$(<version)"
  local modulesdir="$pkgdir/usr/lib/modules/$kernver"

  echo "Installing boot image..."
  # systemd expects to find the kernel here to allow hibernation
  # https://github.com/systemd/systemd/commit/edda44605f06a41fb86b7ab8128dcf99161d2344
  install -Dm644 "$(make -s image_name)" "$modulesdir/vmlinuz"

  # Used by mkinitcpio to name the kernel
  echo "$pkgbase" | install -Dm644 /dev/stdin "$modulesdir/pkgbase"

  echo "Installing modules..."
  make INSTALL_MOD_PATH="$pkgdir/usr" INSTALL_MOD_STRIP=1 modules_install

  # remove build and source links
  rm "$modulesdir"/{source,build}
}

_package-headers() {
  pkgdesc="Headers and scripts for building modules for the $pkgdesc kernel"
  depends=(pahole)

  cd $_srcname
  local builddir="$pkgdir/usr/lib/modules/$(<version)/build"

  echo "Installing build files..."
  install -Dt "$builddir" -m644 .config Makefile Module.symvers System.map \
    localversion.* version vmlinux
  install -Dt "$builddir/kernel" -m644 kernel/Makefile
  install -Dt "$builddir/arch/x86" -m644 arch/x86/Makefile
  cp -t "$builddir" -a scripts

  # required when STACK_VALIDATION is enabled
  install -Dt "$builddir/tools/objtool" tools/objtool/objtool

  # required when DEBUG_INFO_BTF_MODULES is enabled
  install -Dt "$builddir/tools/bpf/resolve_btfids" tools/bpf/resolve_btfids/resolve_btfids

  echo "Installing headers..."
  cp -t "$builddir" -a include
  cp -t "$builddir/arch/x86" -a arch/x86/include
  install -Dt "$builddir/arch/x86/kernel" -m644 arch/x86/kernel/asm-offsets.s

  install -Dt "$builddir/drivers/md" -m644 drivers/md/*.h
  install -Dt "$builddir/net/mac80211" -m644 net/mac80211/*.h

  # https://bugs.archlinux.org/task/13146
  install -Dt "$builddir/drivers/media/i2c" -m644 drivers/media/i2c/msp3400-driver.h

  # https://bugs.archlinux.org/task/20402
  install -Dt "$builddir/drivers/media/usb/dvb-usb" -m644 drivers/media/usb/dvb-usb/*.h
  install -Dt "$builddir/drivers/media/dvb-frontends" -m644 drivers/media/dvb-frontends/*.h
  install -Dt "$builddir/drivers/media/tuners" -m644 drivers/media/tuners/*.h

  # https://bugs.archlinux.org/task/71392
  install -Dt "$builddir/drivers/iio/common/hid-sensors" -m644 drivers/iio/common/hid-sensors/*.h

  echo "Installing KConfig files..."
  find . -name 'Kconfig*' -exec install -Dm644 {} "$builddir/{}" \;

  echo "Removing unneeded architectures..."
  local arch
  for arch in "$builddir"/arch/*/; do
    [[ $arch = */x86/ ]] && continue
    echo "Removing $(basename "$arch")"
    rm -r "$arch"
  done

  echo "Removing documentation..."
  rm -r "$builddir/Documentation"

  echo "Removing broken symlinks..."
  find -L "$builddir" -type l -printf 'Removing %P\n' -delete

  echo "Removing loose objects..."
  find "$builddir" -type f -name '*.o' -printf 'Removing %P\n' -delete

  echo "Stripping build tools..."
  local file
  while read -rd '' file; do
    case "$(file -bi "$file")" in
      application/x-sharedlib\;*)      # Libraries (.so)
        strip -v $STRIP_SHARED "$file" ;;
      application/x-archive\;*)        # Libraries (.a)
        strip -v $STRIP_STATIC "$file" ;;
      application/x-executable\;*)     # Binaries
        strip -v $STRIP_BINARIES "$file" ;;
      application/x-pie-executable\;*) # Relocatable binaries
        strip -v $STRIP_SHARED "$file" ;;
    esac
  done < <(find "$builddir" -type f -perm -u+x ! -name vmlinux -print0)

  echo "Stripping vmlinux..."
  strip -v $STRIP_STATIC "$builddir/vmlinux"

  echo "Adding symlink..."
  mkdir -p "$pkgdir/usr/src"
  ln -sr "$builddir" "$pkgdir/usr/src/$pkgbase"
}

_package-docs() {
  pkgdesc="Documentation for the $pkgdesc kernel"

  cd $_srcname
  local builddir="$pkgdir/usr/lib/modules/$(<version)/build"

  echo "Installing documentation..."
  local src dst
  while read -rd '' src; do
    dst="${src#Documentation/}"
    dst="$builddir/Documentation/${dst#output/}"
    install -Dm644 "$src" "$dst"
  done < <(find Documentation -name '.*' -prune -o ! -type d -print0)

  echo "Adding symlink..."
  mkdir -p "$pkgdir/usr/share/doc"
  ln -sr "$builddir/Documentation" "$pkgdir/usr/share/doc/$pkgbase"
}

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

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# vim:set ts=8 sts=2 sw=2 et: