buildroot/board/miyoo/rootfs/etc/main

#!/bin/busybox sh

BOOTLOGO="boot-logo"
export HOME=/mnt
export ROMS=/roms
export BOOTDIR=/boot # we expect /dev/mmcblk0p1 has been mounted here read only, from inittab
export SDL_NOMOUSE=1
START="${HOME}/autoexec.sh"

LOGS=/dev/null

# check if it's first boot and turn on messages if yes
if ((test -r "${BOOTDIR}/firstboot") || (test -r "${HOME}/firstboot.completed")); then
	DEBUG_MSG="yes"
	LOGS=$(mktemp)
fi

export LOGS # so that subshells can use this as well

if test "x${DEBUG_MSG}" == "xyes"; then
	echo -e "\e[0m"    # normal foreground color
	export DEBUG_MSG   # set it globally for further programs
else
	echo -e "\e[30m"   # black foreground color
fi

# load kernel modules

# load usb gadget
mount none /sys/kernel/config -t configfs
mkdir /sys/kernel/config/usb_gadget/g2
cd /sys/kernel/config/usb_gadget/g2
mkdir configs/c.1
mkdir functions/ffs.mtp
mkdir strings/0x409
mkdir configs/c.1/strings/0x409

echo 0x0100 > idProduct
echo 0x1D6B > idVendor

echo "Miyoo Handheld" > strings/0x409/manufacturer
echo "Miyoo CFW 2.0" > strings/0x409/product

echo "Conf 1" > configs/c.1/strings/0x409/configuration
echo 120 > configs/c.1/MaxPower
ln -s functions/ffs.mtp configs/c.1
mkdir /dev/ffs-mtp
mount -t functionfs mtp /dev/ffs-mtp
umtprd >> "${LOGS}" 2>&1 &
sleep 1
ls /sys/class/udc/ > /sys/kernel/config/usb_gadget/g2/UDC


# Load the expected one screen driver from here with modprobe 
## automatically from rootfs/lib/modules/VERSION
# The uEnv.txt is autogenerated by u-boot from HW which outputs
## environmental variables needed for ID of screen type
video=`cat /sys/kernel/miyoo_video/miyoo_video`

BACKLIGHT=$(cat ${HOME}/.backlight.conf)

# TVout scripting backend
if test -r "${HOME}/tvout"; then
	echo 0 > /sys/class/backlight/backlight/brightness
	echo 0 > /sys/class/vtconsole/vtcon1/bind
	if test $BACKLIGHT -ne 0; then
		cp ${HOME}/.backlight.conf ${HOME}/.backlight.bak
	fi
	echo 0 > ${HOME}/.backlight.conf
	modprobe -r $video
	#TVMODE options.cfg setting 
	export tvmode=$(grep -o TVMODE=[0-1] "${HOME}/options.cfg" | tr '[:upper:]' '[:lower:]')
	modprobe miyoo-tvout $tvmode
	echo 1 > /sys/class/vtconsole/vtcon1/bind
	modprobe -r $video
else
	if ((test -r "${HOME}/.backlight.bak")); then
		mv ${HOME}/.backlight.bak ${HOME}/.backlight.conf
	fi
	# MODULES_CUSTOM scripting
	if (!(test -r "${BOOTDIR}/modules.custom.sh") || !(grep -q MODULES_CUSTOM\=\1 "${HOME}/options.cfg")); then
		# Load video module read from uEnv.txt & defined by variant in console.cfg
		#FLIP & INVERT options.cfg setting
		export flip=$(grep -o FLIP=[0-1] "${HOME}/options.cfg" | tr '[:upper:]' '[:lower:]')
		export invert=$(grep -o INVERT=[0-1] "${HOME}/options.cfg" | tr '[:upper:]' '[:lower:]')
		modprobe $video $flip $invert
	else
		(cd "${BOOTDIR}" && sh modules.custom.sh ) >> "${LOGS}" 2>&1
	fi
fi

# check if it's first boot and defer to the firstboot script if yes
if test -r "${BOOTDIR}/firstboot"; then
	exec sh "${BOOTDIR}/firstboot"
elif test -r "${HOME}/firstboot.completed"; then
	rm "${HOME}/firstboot.completed"
fi

if !(grep -q FS_CHECK\=\0 "${HOME}/options.cfg"); then
##Check if BOOT (FAT16) is flagged as "dirty", and if so unmount, repair, remount
	if dmesg | grep "mmcblk0p1" > /dev/null;  then
		echo -e "\e[31mDirty sectors detected.\e[0m"
		echo -e "\e[32mChecking&Repairing FAT16 BOOT partition...\e[0m"
		umount /dev/mmcblk0p1
		fsck.vfat -y /dev/mmcblk0p1 > /dev/null; 
		mount /dev/mmcblk0p1 "${BOOTDIR}" -t vfat -o ro,exec,utf8
		echo -e "\e[32mCheck complete.\e[0m"
	fi
##Check if MAIN (EXT4) is flagged as "dirty", and if so unmount, repair, remount
	if dmesg | grep "EXT4-fs (mmcblk0p4): warning: mounting fs with errors, running e2fsck is recommended" > /dev/null;  then
		echo -e "\e[31mUnclean shutdown detected.\e[0m"
		echo -e "\e[32mChecking MAIN(EXT4) partition...\e[0m"
		umount /dev/mmcblk0p4
		e2fsck -y /dev/mmcblk0p4 > /dev/null; 
		mount /dev/mmcblk0p4 "${HOME}" -o rw,sync,exec
	fi
##Check if ROMS (EXT4 or FAT32) is flagged as "dirty", and if so unmount, repair, remount
	if dmesg | grep "EXT4-fs (mmcblk0p5): warning: mounting fs with errors, running e2fsck is recommended" > /dev/null;  then
		echo -e "\e[31mUnclean shutdown detected.\e[0m"
		echo -e "\e[32mChecking ROMS(EXT4) partition...\e[0m"
		umount /dev/mmcblk0p5
		e2fsck -y /dev/mmcblk0p5 > /dev/null; 
		mount /dev/mmcblk0p5 "${ROMS}" -o rw,noatime
	elif dmesg | grep "FAT-fs (mmcblk0p5): Volume was not properly unmounted. Some data may be corrupt. Please run fsck." > /dev/null;  then
		echo -e "\e[31mDirty sectors detected.\e[0m"
		echo -e "\e[32mChecking&Repairing ROMS(FAT32) partition...\e[0m"
		umount /dev/mmcblk0p5
		fsck.vfat -y /dev/mmcblk0p5 > /dev/null; 
		mount /dev/mmcblk0p5 "${ROMS}" -t vfat -o rw,utf8
		echo -e "\e[32mCheck complete.\e[0m"
	fi
fi

clear
# try to read what handheld we're on
if test -r "${BOOTDIR}/console.cfg"; then
	source "${BOOTDIR}/console.cfg"
else
	export CONSOLE_VARIANT="unknown"
fi

echo "Boot!" >> "${LOGS}"
echo "Handheld type is ${CONSOLE_VARIANT}" >> "${LOGS}"

# run any custom commands ('daemon' expected to be run from there)
if test -r "${BOOTDIR}/normalboot.custom.sh" ; then
	(cd "${BOOTDIR}" && sh normalboot.custom.sh) # don't redirect, want output on screen
else
	# at least run 'daemon'
	daemon >> "${LOGS}" 2>&1
fi

# run boot logo animation
if (!(grep -q BOOT_LOGO\=\0 "${HOME}/options.cfg")); then
	${BOOTLOGO} >> "${LOGS}" 2>&1
fi

# can't unmount boot because 'daemon' runs from it - but it's mounted read-only
#  so it's fine
## umount /dev/mmcblk0p1

# Writes dmesg after firstboot procedure or if DEBUG_MSG=yes
if test "x${DEBUG_MSG}" == "xyes"; then
	sleep 1
	dmesg > ${HOME}/dmesg.txt
	yes | mv ${LOGS} ${HOME}/log.txt
fi

while [ 1 ]
do
	if test -f "${START}"; then
		source "${START}"
	else
		cd "${HOME}"/gmenu2x;
		./gmenu2x >> /dev/null 2>&1;
	fi
	clear
done