#!/bin/sh
#
# .---.                  .              .
# |                      |              |
# |--- .--. .-.  .-.  .-.|  .-. .--.--. |.-.  .-. .--.  .-.
# |    |   (.-' (.-' (   | (   )|  |  | |   )(   )|  | (.-'
# '    '     --'  --'  -' -  -' '  '   -' -'   -' '   -  --'
#
#                    Freedom in the Cloud
#
# Hardware setup based on bin/freedombox-hardware-setup from freedom-maker
#
# License
# =======
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

PROJECT_NAME='freedombone'

export TEXTDOMAIN=${PROJECT_NAME}-image-hardware-setup
export TEXTDOMAINDIR="/usr/share/locale"

enable_serial_console() {
    # By default, spawn a console on the serial port
    device="$1"
    echo $"Adding a getty on the serial port"
    echo "T0:12345:respawn:/sbin/getty -L $device 115200 vt100" >> /etc/inittab
}

beaglebone_setup_boot() {
    # Setup uEnv.txt
    if grep -q btrfs /etc/fstab ; then
        fstype=btrfs
    else
        fstype=ext4
    fi
    kernelVersion=$(ls /usr/lib/*/am335x-boneblack.dtb | head -1 | cut -d/ -f4)
    version=$(echo $kernelVersion | sed 's/linux-image-\(.*\)/\1/')
    initRd=initrd.img-$version
    vmlinuz=vmlinuz-$version

    # uEnv.txt for Beaglebone
    # based on https://github.com/beagleboard/image-builder/blob/master/target/boot/beagleboard.org.txt
    cat >> /boot/uEnv.txt <<EOF
mmcroot=/dev/mmcblk0p2 ro
mmcrootfstype=$fstype rootwait fixrtc
mmcrootflags=subvol=@

console=ttyO0,115200n8

kernel_file=$vmlinuz
initrd_file=$initRd

loadaddr=0x80200000
initrd_addr=0x81000000
fdtaddr=0x80F80000

initrd_high=0xffffffff
fdt_high=0xffffffff

loadkernel=load mmc \${mmcdev}:\${mmcpart} \${loadaddr} \${kernel_file}
loadinitrd=load mmc \${mmcdev}:\${mmcpart} \${initrd_addr} \${initrd_file}; setenv initrd_size \${filesize}
loadfdt=load mmc \${mmcdev}:\${mmcpart} \${fdtaddr} /dtbs/\${fdtfile}

loadfiles=run loadkernel; run loadinitrd; run loadfdt
mmcargs=setenv bootargs console=tty0 console=\${console} root=\${mmcroot} rootfstype=\${mmcrootfstype} rootflags=\${mmcrootflags}

uenvcmd=run loadfiles; run mmcargs; bootz \${loadaddr} \${initrd_addr}:\${initrd_size} \${fdtaddr}
EOF

    mkdir -p /boot/dtbs
    cp /usr/lib/linux-image-*-armmp/* /boot/dtbs
}

beaglebone_flash() {
    # allow flash-kernel to work without valid /proc contents
    # ** this doesn't *really* work, since there are too many checks
    #    that fail in an emulated environment!  We'll have to do it by
    #    hand below anyway...
    export FK_MACHINE="TI AM335x BeagleBone"
    apt-get install -y flash-kernel
}

beaglebone_repack_kernel() {
    # process installed kernel to create uImage, uInitrd, dtb
    # using flash-kernel would be a good approach, except it fails in the
    # cross build environment due to too many environment checks...
    #FK_MACHINE="TI AM335x BeagleBone" flash-kernel
    #  so, let's do it manually...

    # flash-kernel's hook-functions provided to mkinitramfs have the
    # unfortunate side-effect of creating /conf/param.conf in the initrd
    # when run from our emulated chroot environment, which means our root=
    # on the kernel command line is completely ignored!  repack the initrd
    # to remove this evil...

    echo "info: repacking beaglebone kernel and initrd"

    kernelVersion=$(ls /usr/lib/*/am335x-boneblack.dtb | head -1 | cut -d/ -f4)
    version=$(echo $kernelVersion | sed 's/linux-image-\(.*\)/\1/')
    initRd=initrd.img-$version
    vmlinuz=vmlinuz-$version

    mkdir /tmp/initrd-repack

    (cd /tmp/initrd-repack ; \
     zcat /boot/$initRd | cpio -i ; \
     rm -f conf/param.conf ; \
     find . | cpio --quiet -o -H newc | \
         gzip -9 > /boot/$initRd )

    rm -rf /tmp/initrd-repack

    (cd /boot ; \
     cp /usr/lib/$kernelVersion/am335x-boneblack.dtb dtb ; \
     cat $vmlinuz dtb >> temp-kernel ; \
     mkimage -A arm -O linux -T kernel -n "Debian kernel ${version}" \
             -C none -a 0x80200000 -e 0x80200000 -d temp-kernel uImage ; \
     rm -f temp-kernel ; \
     mkimage -A arm -O linux -T ramdisk -C gzip -a 0x81000000 -e 0x81000000 \
             -n "Debian ramdisk ${version}" \
             -d $initRd uInitrd )
}

a20_setup_boot() {
    dtb="$1"

    # Setup boot.cmd
    if grep -q btrfs /etc/fstab ; then
        fstype=btrfs
    else
        fstype=ext4
    fi
    kernelVersion=$(ls /usr/lib/*/$dtb | head -1 | cut -d/ -f4)
    version=$(echo $kernelVersion | sed 's/linux-image-\(.*\)/\1/')
    initRd=initrd.img-$version
    vmlinuz=vmlinuz-$version

    # Create boot.cmd
    cat >> /boot/boot.cmd <<EOF
setenv mmcdev 0
setenv mmcpart 1

setenv mmcroot /dev/mmcblk0p2 ro
setenv mmcrootfstype $fstype rootwait fixrtc
setenv mmcrootflags subvol=@

setenv console ttyS0,115200n8

setenv kernel_file $vmlinuz
setenv initrd_file $initRd
setenv fdtfile $dtb

setenv loadaddr 0x46000000
setenv initrd_addr 0x48000000
setenv fdtaddr 0x47000000

setenv initrd_high 0xffffffff
setenv fdt_high 0xffffffff

setenv loadkernel load mmc \${mmcdev}:\${mmcpart} \${loadaddr} \${kernel_file}
setenv loadinitrd load mmc \${mmcdev}:\${mmcpart} \${initrd_addr} \${initrd_file}\\; setenv initrd_size \\\${filesize}
setenv loadfdt load mmc \${mmcdev}:\${mmcpart} \${fdtaddr} /dtbs/\${fdtfile}

setenv loadfiles run loadkernel\\; run loadinitrd\\; run loadfdt
setenv mmcargs setenv bootargs console=\${console} root=\${mmcroot} rootfstype=\${mmcrootfstype} rootflags=\${mmcrootflags}

run loadfiles; run mmcargs; bootz \${loadaddr} \${initrd_addr}:\${initrd_size} \${fdtaddr}
EOF

    # boot.scr for Allwinner A20 based device
    mkimage -C none -A arm -T script -d /boot/boot.cmd /boot/boot.scr

    # Copy all DTBs
    mkdir -p /boot/dtbs
    cp /usr/lib/$kernelVersion/* /boot/dtbs

    # extra boot modules
    echo "rtc_sunxi" >> /etc/initramfs-tools/modules
}

case "$MACHINE" in
    beaglebone)
        beaglebone_setup_boot
        beaglebone_flash
        beaglebone_repack_kernel
        enable_serial_console ttyO0
        ;;
    cubietruck)
        a20_setup_boot sun7i-a20-cubietruck.dtb
        enable_serial_console ttyS0
        ;;
    a20-olinuxino-lime)
        a20_setup_boot sun7i-a20-olinuxino-lime.dtb
        enable_serial_console ttyS0
        ;;
    a20-olinuxino-lime2)
        a20_setup_boot sun7i-a20-olinuxino-lime2.dtb
        enable_serial_console ttyS0
        ;;
    a20-olinuxino-micro)
        a20_setup_boot sun7i-a20-olinuxino-micro.dtb
        enable_serial_console ttyS0
        ;;
    cubieboard2)
        a20_setup_boot sun7i-a20-cubieboard2.dtb
        enable_serial_console ttyS0
        ;;
esac