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#!/bin/sh
######################################################################
# __________ __ ___.
# Open \______ \ ____ ____ | | _\_ |__ _______ ___
# Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
# Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
# Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
# \/ \/ \/ \/ \/
#
# * Safe Mode for Samsung YP-R0 / YP-R1 *
# * Copyright (C) 2013 Lorenzo Miori and VanniX
######################################################################
# 0 = R0 ; 1 = R1
PLATFORM=0
BUTTON_DEVICE="/dev/r0Btn"
PMK=$(echo -e -n "\x01") # same for both devices
STORAGES="/dev/stl3,/dev/stl2,/dev/mmcblk0"
MODE="normal"
if [ $# -eq 1 ]
then
MODE=$1
fi
# rather simple but effective check
# different key codes to trigger safe mode
if [ -e "/usr/local/bin/r1" ]
then
# running on YP-R1 model
BACK=$(echo -e -n "\x03")
PLATFORM=1
BUTTON_DEVICE="/dev/r1Button"
STORAGES="/dev/stl3,/dev/stl2"
else
BACK=$(echo -e -n "\x08")
PLATFORM=0
BUTTON_DEVICE="/dev/r0Btn"
STORAGES="/dev/stl3,/dev/stl2,/dev/mmcblk0"
fi
power_pressed()
{
VAR=$(dd if=$BUTTON_DEVICE bs=4 count=1)
[[ "$VAR" = "$PMK" ]]
return $?
}
cable_disconnected()
{
if [ $PLATFORM -eq 0 ]
then
/usr/local/bin/minird 0x0a | grep -q 0x00
return $?
else
/etc/safemode/cable_detect
return $?
fi
}
enable_display()
{
echo -n "0" > /sys/devices/platform/afe.0/bli
echo -n "1" > /sys/class/graphics/fb0/blank
echo -n "0" >> /sys/class/graphics/fb0/blank
echo -n "1" > /sys/devices/platform/afe.0/bli
}
display_image()
{
cat $1 > "/dev/fb0"
}
if [ $MODE != "forced" ]
then
KEY=$(dd if=$BUTTON_DEVICE bs=4 count=1)
if [[ "$KEY" != "$BACK" ]]; then
# do not enter safe mode and continue normal boot
exit 0
fi
fi
# Here we entered safe mode, so first clean the display
# and turn on backlight at minimum level
enable_display
# there are different ROMs around...
if [ -e "/etc/safemode/safemode.raw" ]
then
DefIMG="/etc/safemode/safemode.raw"
else
DefIMG="/etc/mods/safe_mode.raw"
fi
RbtIMG="/etc/safemode/post_smode.raw"
PreIMG="/etc/safemode/pre_smode.raw"
NOUSB=true
if cable_disconnected
then
display_image $PreIMG
while $NOUSB
do
# User aborts safe mode before mounting anything, just exit
# and continue normal boot
if power_pressed
then
sleep 1
if power_pressed
then
exit 1
fi
fi
if cable_disconnected
then
echo "USB not connected - Waiting"
else
sleep 1
if cable_disconnected
then
echo "USB first check OK - Waiting"
else
sleep 1
if cable_disconnected
then
echo "USB second check OK - Waiting"
else
NOUSB=false
USB=true
fi
fi
fi
done
else
while $NOUSB
do
if cable_disconnected
then
echo "USB not connected - Waiting"
else
sleep 1
if cable_disconnected
then
echo "USB first check OK - Waiting"
else
NOUSB=false
USB=true
fi
fi
done
fi
display_image $DefIMG
echo "Enabling usb storage..."
lsmod | grep g_file_storage
if [ $? == 0 ]
then
umount /mnt/media1/dev/gadget
fi
umount /mnt/media1
umount /mnt/media0
lsmod | grep rfs
if [ $? == 0 ]
then
rmmod rfs
fi
lsmod | grep g_file_storage
if [ $? == 0 ]
then
rmmod gadgetfs
rmmod g_file_storage
rmmod arcotg_udc
fi
lsmod | grep g_serial
if [ $? == 0 ]
then
rmmod g_serial
fi
lsmod | grep g_file_storage
if [ $? != 0 ]
then
modprobe g-file-storage file=$STORAGES removable=1
fi
SAFE=true
while $SAFE
do
if power_pressed
then
sleep 1
if power_pressed
then
SAFE=false
fi
fi
done
echo "Removing loaded modules..."
rmmod g_file_storage
rmmod arcotg_udc
display_image $RbtIMG
USB=true
while $USB
do
if cable_disconnected
then
sleep 1
if cable_disconnected
then
if cable_disconnected
then
sleep 1
if cable_disconnected
then
USB=false
else
echo "USB connected - Waiting"
USB=true
fi
else
echo "USB connected - Waiting"
USB=true
fi
else
echo "USB connected - Waiting"
USB=true
fi
else
echo "USB connected - Waiting"
USB=true
fi
done
#power key pressed for almost 2 sec and cable disconnected. Power off!
exit 1
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