#!/bin/sh

# raspi-boot.SlackBuild
# Boot firmware for Raspberry Pi
#
# Copyright 2012 David Spencer, Baildon, West Yorkshire, U.K.
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#------------------------------------------------------------------------------
#
# Before you run this SlackBuild you must get a tarball of the firmware
# from the raspberrypi's github repository:
# a script is here to help that (if you haven't already run it through
# the get_needed_files.sh in the main folder)
#
#  sh get_firmware.sh
#  sh get_userland.sh (not needed ATM)
#
#------------------------------------------------------------------------------

PRGNAM=raspi-boot
VERSION=${VERSION:-$(date '+%Y%m%d')}
BUILD=${BUILD:-1}
TAG=${TAG:-}

ARCH=arm

CWD=$(pwd)
TMP=${TMP:-/tmp}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

set -e

rm -rf $PKG
mkdir -p $PKG

GITREV=${GITREV:-$(echo raspberrypi-firmware-*.tar.gz | sed -e "s|raspberrypi-firmware-||" -e "s|\.tar\.gz||")}
echo "Uncompressing the firmware silently to avoid spamming the console too much."
echo "It can take a while..."
echo "tar xf raspberrypi-firmware-$GITREV.tar.gz"
tar xf raspberrypi-firmware-$GITREV.tar.gz
mv raspberrypi-firmware-$GITREV firmware

cd $CWD/firmware/boot
chown -R root:root * ../opt ../documentation
chmod 644 *

mkdir -p $PKG/boot
cp -a \
  bootcode.bin fixup*.dat start*.elf LICENCE.broadcom COPYING.linux \
  $PKG/boot
zcat $CWD/README.initrd.gz > $PKG/boot/README.initrd
zcat $CWD/README.boot.gz   > $PKG/boot/README

# The default memory allocation for the OS and GPU is set here
# (or by pasing it as an environment variable).
# GPUMEM preferred values are 16 or 64 or 128.
# The operating system will get the rest of memory, i.e. 256-$GPUMEM Mb.
# We use the 16Mb version by default (upstream has 64Mb by default, but this
# seems pointless until accelerated video works).
# You can also edit this later in /boot/config.txt.
GPUMEM=${GPUMEM:-16}

# There is now a documented 'safe mode', so we'll include upstream's prebuilt
# 'emergency kernel' with its built-in busybox.
# To boot it, add a jumper on pins 5 and 6 of P1.
cp -a \
  kernel_emergency.img \
  $PKG/boot/

# Install config.txt as .new even though it's not in /etc
sed "s|@GPUMEM@|$GPUMEM|" $CWD/config.txt > $PKG/boot/config.txt.new

# Install the proprietary parts in $PKG/opt
cp -a ../opt $PKG/opt

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a \
  LICENCE.broadcom COPYING.linux ../documentation/ilcomponents \
  $PKG/usr/doc/$PRGNAM-$VERSION/
mv $PKG/opt/vc/LICENCE $PKG/usr/doc/$PRGNAM-$VERSION/LICENCE.vc

# Add version stamp into /boot and /usr/doc
echo "Package: $PRGNAM-$VERSION-$ARCH-$BUILD$TAG" \
  >  $PKG/boot/version-$PRGNAM.txt
echo "Build date: $(date -u '+%F %T')" \
  >> $PKG/boot/version-$PRGNAM.txt
echo "Git revision: $GITREV" \
  >> $PKG/boot/version-$PRGNAM.txt
cp \
  $PKG/boot/version-$PRGNAM.txt \
  $PKG/usr/doc/$PRGNAM-$VERSION/version.txt

## Install the userland libs
cd $CWD
GITREV=$(echo raspberrypi-userland-*.tar.gz | sed -e "s|raspberrypi-userland-||" -e "s|\.tar\.gz||")
mkdir -p $TMP/$PRGNAM
cd $TMP/$PRGNAM
tar xf $CWD/raspberrypi-userland-$GITREV.tar.gz
chown -R root:root .
find . \
  \( -perm 777 -o -perm 775 -o -perm 711 -o -perm 555 -o -perm 511 \) \
  -exec chmod 755 {} \; -o \
  \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
  -exec chmod 644 {} \;
mkdir -p raspberrypi-userland-$GITREV/build/arm-linux/release
cd raspberrypi-userland-$GITREV/build/arm-linux/release

# The build try to crosscompile for hardfloat by default, but we don't need it
sed -e "s|arm-linux-gnueabihf-||" \
  -e "s|\ -mfloat-abi=hard| -O2 -march=armv6zk -mfpu=vfp -mfloat-abi=hard|" \
  ../../../makefiles/cmake/toolchains/arm-linux-gnueabihf.cmake > \
  ../../../makefiles/cmake/toolchains/armv6hl-slackware-linux-gnueabi.cmake

cmake -DCMAKE_TOOLCHAIN_FILE=../../../makefiles/cmake/toolchains/armv6hl-slackware-linux-gnueabi.cmake \
  -DCMAKE_INSTALL_PREFIX=/opt/vc -DCMAKE_BUILD_TYPE=Release ../../..
make
make install DESTDIR=$PKG

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc
cat $CWD/doinst.sh > $PKG/install/doinst.sh

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}