#!/bin/bash

# --- TODO
# * remove dependance on debian based host
# ** use linaro toolchain
#     https://launchpad.net/linaro-toolchain-binaries/trunk/
# * clean up script
# * switch userland to hard-float binaries
# * build rootfs from slackwarearm-current
#    ftp://ftp.arm.slackware.com/slackwarearm/slackwarearm-devtools/minirootfs/scripts/
# * package the kernel in a real slackware package

# --- Configuration -------------------------------------------------------------
#change to your needs
VERSION="SlackwareARM_0.1"
DEST_LANG="en_US"
DEST_LANGUAGE="us"
COMPILE="true"
mkdir ~/cubieslack
DEST=~/cubieslack
DISPLAY=3  # "3:hdmi; 4:vga"
# --- End -----------------------------------------------------------------------

SRC=$(pwd)
set -e

#Requires root ..
if [ "$UID" -ne 0 ]
  then echo "Please run as root"
  exitssid=CUBIE
interface=wlan0
hw_mode=g
channel=1
bridge=br0

logger_syslog=0
logger_syslog_level=0

wmm_enabled=0
wpa=2
preamble=1
wpa_psk=66eb31d2b48d19ba216f2e50c6831ee11be98e2fa3a8075e30b866f4a5ccda27
wpa_passphrase=12345678
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP
rsn_pairwise=CCMP
auth_algs=1
macaddr_acl=0
fi
echo "Building Cubietruck-Slackware in $DEST from $SRC"
sleep 3
#--------------------------------------------------------------------------------
# Downloading necessary files for building - aka Toolchain
#--------------------------------------------------------------------------------
echo "------ Downloading necessary files"
#Read this for further information if you run into problems with gcc compiler
#http://linux-sunxi.org/Toolchain
apt-get -qq -y install binfmt-support bison build-essential ccache debootstrap flex gawk gcc-arm-linux-gnueabi gcc-arm-linux-gnueabihf gettext linux-headers-generic linux-image-generic lvm2 qemu-user-static texinfo texlive u-boot-tools uuid-dev zlib1g-dev unzip libncurses5-dev pkg-config libusb-1.0-0-dev
#--------------------------------------------------------------------------------
# Preparing output / destination files
#--------------------------------------------------------------------------------

echo "------ Fetching files from github"
mkdir -p $DEST/output
cp output/uEnv.txt $DEST/output

if [ -d "$DEST/u-boot-sunxi" ]
then
	cd $DEST/u-boot-sunxi ; git pull; cd $SRC
else
	git clone https://github.com/cubieboard/u-boot-sunxi $DEST/u-boot-sunxi # Boot loader
# Applying Patch for 2gb memory
	patch -f $DEST/u-boot-sunxi/include/configs/sunxi-common.h < $SRC/patch/memory.patch || true
fi
if [ -d "$DEST/sunxi-tools" ]
then
	cd $DEST/sunxi-tools; git pull; cd $SRC
else
	git clone https://github.com/linux-sunxi/sunxi-tools.git $DEST/sunxi-tools # Allwinner tools
fi
if [ -d "$DEST/cubie_configs" ]
then
	cd $DEST/cubie_configs; git pull; cd $SRC
else
	git clone https://github.com/cubieboard/cubie_configs $DEST/cubie_configs # Hardware configurations

# Applying Patch for high load. Could cause troubles with USB OTG port
	sed -e 's/usb_detect_type     = 1/usb_detect_type     = 0/g' $DEST/cubie_configs/sysconfig/linux/cubietruck.fex > $DEST/cubie_configs/sysconfig/linux/ct.fex

# Prepare fex files for VGA & HDMI
	sed -e 's/screen0_output_type.*/screen0_output_type     = 3/g' $DEST/cubie_configs/sysconfig/linux/ct.fex > $DEST/cubie_configs/sysconfig/linux/ct-hdmi.fex
	sed -e 's/screen0_output_type.*/screen0_output_type     = 4/g' $DEST/cubie_configs/sysconfig/linux/ct.fex > $DEST/cubie_configs/sysconfig/linux/ct-vga.fex
fi
if [ -d "$DEST/linux-sunxi" ]
then
	cd $DEST/linux-sunxi; git pull -f; cd $SRC
else
	git clone https://github.com/patrickhwood/linux-sunxi $DEST/linux-sunxi # Patwood's kernel 3.4.75+

###PATCH kernel CONFIG_HZ, Arm dfault is hardcoded 100hz (10ms latency!). For mulitimedia and desktop a higher frequency is recomended.

#test -f $SRC/patch/250HZ.patch && patch -f $DEST/linux-sunxi/arch/arm/Kconfig < $SRC/patch/250HZ.patch
	test -f $SRC/patch/300HZ.patch && patch -f $DEST/linux-sunxi/arch/arm/Kconfig < $SRC/patch/300HZ.patch
#test -f $SRC/patch/1000HZ.patch && patch -f $DEST/linux-sunxi/arch/arm/Kconfig < $SRC/patch/1000HZ.patch
fi


# Copying Kernel config
cp $SRC/config/kernel.config $DEST/linux-sunxi/

#--------------------------------------------------------------------------------
# Compiling everything
#--------------------------------------------------------------------------------
echo "------ Compiling kernel boot loaderb"
cd $DEST/u-boot-sunxi
# boot loader
make clean && make -j2 'cubietruck' CROSS_COMPILE=arm-linux-gnueabihf-
echo "------ Compiling sunxi tools"
cd $DEST/sunxi-tools
# sunxi-tools
make clean && make fex2bin && make bin2fex
cp fex2bin bin2fex /usr/local/bin/
# hardware configuration
fex2bin $DEST/cubie_configs/sysconfig/linux/ct-vga.fex $DEST/output/script-vga.bin
fex2bin $DEST/cubie_configs/sysconfig/linux/ct-hdmi.fex $DEST/output/script-hdmi.bin

if [ "$COMPILE" = "true" ]; then
# kernel image
echo "------ Compiling kernel"
cd $DEST/linux-sunxi
make clean

# Adding wlan firmware to kernel source
cd $DEST/linux-sunxi/firmware;
unzip -o $SRC/bin/ap6210.zip
cd $DEST/linux-sunxi

make -j2 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- sun7i_defconfig
# get proven config
cp $DEST/linux-sunxi/kernel.config $DEST/linux-sunxi/.config
make -j2 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- uImage modules
make -j2 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- INSTALL_MOD_PATH=output modules_install
make -j2 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- INSTALL_HDR_PATH=output headers_install
fi
#--------------------------------------------------------------------------------
# Creating SD Images
#--------------------------------------------------------------------------------
echo "------ Creating SD Images"
cd $DEST/output
# create 2Gb image and mount image to next free loop device
dd if=/dev/zero of=slackware_rootfs.raw bs=1M count=2000
LOOP0=$(losetup -f)
losetup $LOOP0 slackware_rootfs.raw

echo "------ Partitionning and mounting filesystem"
# make image bootable
dd if=$DEST/u-boot-sunxi/u-boot-sunxi-with-spl.bin of=$LOOP0 bs=1024 seek=8

# create one partition starting at 2048 which is default
(echo n; echo p; echo 1; echo; echo; echo w) | fdisk $LOOP0 >> /dev/null || true
# just to make sure
partprobe $LOOP0

LOOP1=$(losetup -f)
# 2048 (start) x 512 (block size) = where to mount partition
losetup -o 1048576 $LOOP1 $LOOP0
# create filesystem
mkfs.ext4 $LOOP1
# create mount point and mount image
mkdir -p $DEST/output/sdcard/
mount $LOOP1 $DEST/output/sdcard/

echo "------ Get basic Slackware System"
cd $DEST/output/sdcard/
wget -q ftp://ftp.arm.slackware.com/slackwarearm/slackwarearm-devtools/minirootfs/roots/slack-14.1-miniroot_04Nov13.tar.xz
tar xf slack-14.1-miniroot_04Nov13.tar.xz
sync
rm slack-14.1-miniroot_04Nov13.tar.xz

cat > $DEST/output/sdcard/etc/motd <<EOF
	      _      _        _                       _
  ___  _   _ | |__  (_)  ___ | |_  _ __  _   _   ___ | | __
 / __|| | | || '_ \ | | / _ \| __|| '__|| | | | / __|| |/ /
| (__ | |_| || |_) || ||  __/| |_ | |   | |_| || (__ |   <
 \___| \__,_||_.__/ |_| \___| \__||_|    \__,_| \___||_|\_\
						  Slackware

EOF

# script to turn off the LED blinking
cp $SRC/scripts/disable_led.sh $DEST/output/sdcard/bin/disable_led.sh

# make it executable
chmod +x $DEST/output/sdcard/bin/disable_led.sh
# and startable on boot
echo disable_led.sh > $DEST/output/sdcard/etc/rc.conf

# scripts for autoresize at first boot from cubian
cp $SRC/scripts/resize2fs-arch.sh $DEST/output/sdcard/resize2fs-arch.sh
# make it executable
chmod +x $DEST/output/sdcard/resize2fs-arch.sh
# and startable on boot just execute it once not on every boot!!!
#echo cubian-resize2fs > $DEST/output/sdcard/etc/rc.conf

# script to install to NAND
cp $SRC/scripts/nand-install.sh $DEST/output/sdcard/root
cp $SRC/bin/nand1-boot-cubietruck-arch.tgz $DEST/output/sdcard/root

# install and configure locales for Germany
echo LANG='$DEST_LANG'.UTF-8 > $DEST/output/sdcard/etc/default.conf
echo KEYMAP=us > $DEST/output/sdcard/etc/vconsole.conf
#use this command when System runs
# sudo timedatectl set-timezone Zone/SubZone
# when setup preferred gui like openbox then use loadkeys de

# i recommend you to change this urgently + add a proper user for the System!!!
# default passwort for user "root" is "root"
#echo 1234;echo 1234; | passwd root

# set hostname
echo darkstar > $DEST/output/sdcard/etc/hostname



### mount /tmp as tmpfs
echo 'tmpfs /tmp  tmpfs   defaults,nosuid,size=30%   0   0' >> $DEST/output/sdcard/etc/fstab

### Optional /var/log
#echo 'tmpfs /var/log  tmpfs   defaults,nosuid   0   0' >> $DEST/output/sdcard/etc/fstab

##disable IPV6 and reduce timeout from 30s to 5 on dhcp daemon

#echo "ipv4only" >> /etc/dhcpcd.conf
#echo "noipv6rs" >> /etc/dhcpcd.conf
echo "timeout 5" >> /etc/dhcpcd.conf




# load modules you may load them per sysctl
cat >> $DEST/output/sdcard/etc/rc.d/rc.local <<EOT
/sbin/modprobe hci_uart
/sbin/modprobe gpio_sunxi
/sbin/modprobe bcmdhd
/sbin/modprobe ump
/sbin/modprobe mali
#/sbin/modprobe sunxi_gmac

EOT

# edit this to your personal needs/network configs take the ones from /etc/netctl/examples/ folder
# create interfaces configuration
#cat > $DEST/output/sdcard/etc/netctl/interfaces/eth0 <<EOT
#auto eth0
#allow-hotplug eth0
#iface eth0 inet dhcp
#        hwaddress ether #for AP use
#
#EOT

#use wifi-menu wlan0 to configure
#cat > $DEST/output/sdcard/etc/netctl/wlan0 <<EOT
#auto wlan0
#allow-hotplug wlan0
#iface wlan0 inet dhcp
#    wpa-ssid SSID
#    wpa-psk xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
# to generate proper encrypted key: wpa_passphrase yourSSID yourpassword

#EOT

# create interfaces if you want to have AP. /etc/modules must be: bcmdhd op_mode=2
#cat <<EOT >> $DEST/output/sdcard/etc/network/interfaces.hostapd
#auto lo br0
#iface lo inet loopback

#allow-hotplug eth0
#iface eth0 inet manual

#allow-hotplug wlan0
#iface wlan0 inet manual

#iface br0 inet dhcp
#bridge_ports eth0 wlan0
#hwaddress ether # will be added at first boot
#EOT

# enable serial console (Debian/sysvinit way)
#echo T0:2345:respawn:/sbin/getty -L ttyS0 115200 vt100 >> $DEST/output/sdcard/etc/inittab

#remove the preconfigured boot from the image and use the one we want
rm -rf $DEST/output/sdcard/boot/
mkdir $DEST/output/sdcard/boot/
cp $DEST/output/uEnv.txt $DEST/output/sdcard/boot/
cp $DEST/linux-sunxi/arch/arm/boot/uImage $DEST/output/sdcard/boot/

# copy proper bin file
if [ $DISPLAY = 4 ]; then
cp $DEST/output/script-vga.bin $DEST/output/sdcard/boot/script.bin
else
cp $DEST/output/script-hdmi.bin $DEST/output/sdcard/boot/script.bin
fi

cp -R $DEST/linux-sunxi/output/lib/modules $DEST/output/sdcard/lib/
cp -R $DEST/linux-sunxi/output/lib/firmware/ $DEST/output/sdcard/lib/

# USB redirector tools http://www.incentivespro.com
#cd $DEST
#wget http://www.incentivespro.com/usb-redirector-linux-arm-eabi.tar.gz
#tar xvfz usb-redirector-linux-arm-eabi.tar.gz
#rm usb-redirector-linux-arm-eabi.tar.gz
#cd $DEST/usb-redirector-linux-arm-eabi/files/modules/src/tusbd
#make -j2 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- KERNELDIR=$DEST/linux-sunxi/
# configure USB redirector
#sed -e 's/%INSTALLDIR_TAG%/\/usr\/local/g' $DEST/usb-redirector-linux-arm-eabi/files/rc.usbsrvd > $DEST/usb-redirector-linux-arm-eabi/files/rc.usbsrvd1
#sed -e 's/%PIDFILE_TAG%/\/var\/run\/usbsrvd.pid/g' $DEST/usb-redirector-linux-arm-eabi/files/rc.usbsrvd1 > $DEST/usb-redirector-linux-arm-eabi/files/rc.usbsrvd
#sed -e 's/%STUBNAME_TAG%/tusbd/g' $DEST/usb-redirector-linux-arm-eabi/files/rc.usbsrvd > $DEST/usb-redirector-linux-arm-eabi/files/rc.usbsrvd1
#sed -e 's/%DAEMONNAME_TAG%/usbsrvd/g' $DEST/usb-redirector-linux-arm-eabi/files/rc.usbsrvd1 > $DEST/usb-redirector-linux-arm-eabi/files/rc.usbsrvd
#chmod +x $DEST/usb-redirector-linux-arm-eabi/files/rc.usbsrvd
# copy to root
#cp $DEST/usb-redirector-linux-arm-eabi/files/usb* $DEST/output/sdcard/usr/local/bin/
#cp $DEST/usb-redirector-linux-arm-eabi/files/modules/src/tusbd/tusbd.ko $DEST/output/sdcard/usr/local/bin/
#cp $DEST/usb-redirector-linux-arm-eabi/files/rc.usbsrvd $DEST/output/sdcard/etc/modules-load.d/
# started by default

# hostapd from testing binary replace.
cd $DEST/output/sdcard/usr/sbin/
tar xvfz $SRC/bin/hostapd21.tgz
cp $SRC/config/hostapd.conf $DEST/output/sdcard/etc/

# sunxi-tools
cd $DEST/sunxi-tools
make clean && make -j2 'fex2bin' CC=arm-linux-gnueabihf-gcc && make -j2 'bin2fex' CC=arm-linux-gnueabihf-gcc && make -j2 'nand-part' CC=arm-linux-gnueabihf-gcc
cp fex2bin $DEST/output/sdcard/usr/bin/
cp bin2fex $DEST/output/sdcard/usr/bin/
cp nand-part $DEST/output/sdcard/usr/bin/

# umount images
umount $DEST/output/sdcard/
losetup -d $LOOP1
losetup -d $LOOP0
# compress image
gzip $DEST/output/*.raw