diff --git a/.gitignore b/.gitignore
index c8415f20e..ce0f83185 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,7 @@
 *.o
 *.ko
 *.d
+!init.d
 host-tools/
 host-tools
 *.sqfs
diff --git a/buildroot/board/cvitek/SG200X/overlay/etc/init.d/S07fs2 b/buildroot/board/cvitek/SG200X/overlay/etc/init.d/S07fs2
new file mode 100755
index 000000000..8ecb2a761
--- /dev/null
+++ b/buildroot/board/cvitek/SG200X/overlay/etc/init.d/S07fs2
@@ -0,0 +1,10 @@
+#!/bin/sh
+
+if [ "$1" = "start" ]
+then
+	. /etc/profile
+	printf "mounting filesystem : "
+	mount -t configfs configfs /sys/kernel/config
+	mount -t debugfs debugfs /sys/kernel/debug
+	echo "OK"
+fi
diff --git a/buildroot/board/cvitek/SG200X/overlay/etc/init.d/S07kmod2 b/buildroot/board/cvitek/SG200X/overlay/etc/init.d/S07kmod2
new file mode 100755
index 000000000..016101dce
--- /dev/null
+++ b/buildroot/board/cvitek/SG200X/overlay/etc/init.d/S07kmod2
@@ -0,0 +1,14 @@
+#!/bin/sh
+
+if [ "$1" = "start" ]
+then
+	. /etc/profile
+	printf "load kernel module: "
+	cd /mnt/system/ko/
+	insmod soph_wdt.ko
+	insmod soph_clock_cooling.ko
+	insmod soph_rtc.ko
+	insmod soph_mon.ko
+	echo "OK"
+	exit 0
+fi
diff --git a/buildroot/board/cvitek/SG200X/overlay/etc/init.d/S08usbdev b/buildroot/board/cvitek/SG200X/overlay/etc/init.d/S08usbdev
new file mode 100755
index 000000000..a5dff6b7d
--- /dev/null
+++ b/buildroot/board/cvitek/SG200X/overlay/etc/init.d/S08usbdev
@@ -0,0 +1,226 @@
+#!/bin/sh
+
+
+if [ "$1" = "start" ]
+then
+	. /etc/profile
+	if [ -e /boot/usb.host ]
+	then
+		echo "usb mode: host"
+		echo host > /proc/cviusb/otg_role
+	elif [ -e /boot/usb.dev ]
+	then
+		echo "usb mode: device"
+		cd /sys/kernel/config/usb_gadget
+		mkdir -p g0
+		cd g0
+		if [ -e /boot/usb.idVendor ]
+		then
+			cat /boot/usb.idVendor > idVendor
+		else
+			echo 0x359F > idVendor
+		fi
+		if [ -e /boot/usb.idProduct ]
+		then
+			cat /boot/usb.idProduct > idProduct
+		else
+			echo 0x2120 > idProduct
+		fi
+		if [ -e /boot/usb.bcdDevice ]
+		then
+			cat /boot/usb.bcdDevice > bcdDevice
+		else
+			echo 0x0300 > bcdDevice
+		fi
+		if [ -e /boot/usb.bcdUSB ]
+		then
+			cat /boot/usb.bcdUSB > bcdUSB
+		else
+			echo 0x0200 > bcdUSB
+		fi
+		if [ -e /boot/usb.bDeviceClass ]
+		then
+			cat /boot/usb.bDeviceClass > bDeviceClass
+		else
+			echo 0xef > bDeviceClass
+		fi
+		if [ -e /boot/usb.bDeviceSubClass ]
+		then
+			cat /boot/usb.bDeviceSubClass > bDeviceSubClass
+		else
+			echo 0x02 > bDeviceSubClass
+		fi
+		if [ -e /boot/usb.bDeviceProtocol ]
+		then
+			cat /boot/usb.bDeviceProtocol > bDeviceProtocol
+		else
+			echo 0x01 > bDeviceProtocol
+		fi
+		mkdir -p strings/0x409
+		if [ -e /boot/usb.serialnumber ]
+		then
+			cat /boot/usb.serialnumber > strings/0x409/serialnumber
+		else
+			cat /device_key > strings/0x409/serialnumber
+		fi
+		if [ -e /boot/usb.manufacturer ]
+		then
+			cat /boot/usb.manufacturer > strings/0x409/manufacturer
+		else
+			echo 'sipeed' > strings/0x409/manufacturer
+		fi
+		if [ -e /boot/usb.product ]
+		then
+			cat /boot/usb.product > strings/0x409/product
+		else
+			echo 'licheervnano' > strings/0x409/product
+		fi
+		mkdir -p configs/c.1
+		# uvc
+		if [ -e /boot/usb.uvc ]
+		then
+			/etc/init.d/uvc_tool.sh mount /boot/usb.uvc
+			/etc/init.d/uvc_tool.sh server
+		fi
+
+		if [ -e /boot/usb.GS0 ]
+		then
+			mkdir -p functions/acm.GS0
+			rm -rf configs/c.1/acm.GS0
+			ln -s functions/acm.GS0 configs/c.1/
+		fi
+
+		if [ -e /boot/usb.disk0 ]
+		then
+			mkdir -p functions/mass_storage.disk0
+			rm -rf configs/c.1/mass_storage.disk0
+			ln -s functions/mass_storage.disk0 configs/c.1/
+			echo 1 > functions/mass_storage.disk0/lun.0/removable
+			if [ -e /boot/usb.disk0.ro ]
+			then
+				echo 1 > functions/mass_storage.disk0/lun.0/ro
+				echo 1 > functions/mass_storage.disk0/lun.0/cdrom
+			fi
+			disk=$(cat /boot/usb.disk0)
+			if [ -z "${disk}" ]
+			then
+				if [ ! -e /mnt/usbdisk.img ]
+				then
+					dd if=/dev/zero of=/mnt/usbdisk.img bs=1M count=16
+					mkfs.vfat /mnt/usbdisk.img
+				fi
+				echo /mnt/usbdisk.img > functions/mass_storage.disk0/lun.0/file
+			else
+				cat /boot/usb.disk0 > functions/mass_storage.disk0/lun.0/file
+			fi
+		fi
+
+		# rndis
+		if [ -e /boot/usb.rndis ]
+		then
+			mkdir -p functions/rndis.usb0
+			ln -s functions/rndis.usb0 configs/c.1/
+			echo e0 > functions/rndis.usb0/class
+			echo 01 > functions/rndis.usb0/subclass
+			echo 03 > functions/rndis.usb0/protocol
+		fi
+
+		# ncm
+		if [ -e /boot/usb.ncm ]
+		then
+			mkdir -p functions/ncm.usb0
+			ln -s functions/ncm.usb0 configs/c.1/
+		fi
+
+		# keyboard
+		if [ -e /boot/usb.keyboard ]
+		then
+			mkdir functions/hid.GS0
+			# echo 1 > functions/hid.GS0/subclass
+			echo 1 > functions/hid.GS0/wakeup_on_write
+			echo 1 > functions/hid.GS0/protocol
+			echo 6 > functions/hid.GS0/report_length
+			echo -ne \\x05\\x01\\x09\\x06\\xa1\\x01\\x05\\x07\\x19\\xe0\\x29\\xe7\\x15\\x00\\x25\\x01\\x75\\x01\\x95\\x08\\x81\\x02\\x95\\x01\\x75\\x08\\x81\\x03\\x95\\x05\\x75\\x01\\x05\\x08\\x19\\x01\\x29\\x05\\x91\\x02\\x95\\x01\\x75\\x03\\x91\\x03\\x95\\x06\\x75\\x08\\x15\\x00\\x25\\x65\\x05\\x07\\x19\\x00\\x29\\x65\\x81\\x00\\xc0 > functions/hid.GS0/report_desc
+			ln -s functions/hid.GS0 configs/c.1
+		fi
+
+		# mouse
+		if [ -e /boot/usb.mouse ]
+		then
+			mkdir functions/hid.GS1
+			# echo 1 > functions/hid.GS1/subclass
+			echo 1 > functions/hid.GS1/wakeup_on_write
+			echo 2 > functions/hid.GS1/protocol
+			echo -ne \\x34 > functions/hid.GS1/report_length
+			echo -ne \\x5\\x1\\x9\\x2\\xa1\\x1\\x9\\x1\\xa1\\x0\\x5\\x9\\x19\\x1\\x29\\x3\\x15\\x0\\x25\\x1\\x95\\x3\\x75\\x1\\x81\\x2\\x95\\x1\\x75\\x5\\x81\\x3\\x5\\x1\\x9\\x30\\x9\\x31\\x9\\x38\\x15\\x81\\x25\\x7f\\x75\\x8\\x95\\x3\\x81\\x6\\xc0\\xc0 > functions/hid.GS1/report_desc        
+			ln -s functions/hid.GS1 configs/c.1
+		fi
+
+		# touchpad
+		if [ -e /boot/usb.touchpad ]
+		then
+			mkdir functions/hid.GS2
+			# echo 1 > functions/hid.GS2/subclass
+			echo 1 > functions/hid.GS2/wakeup_on_write
+			echo 2 > functions/hid.GS2/protocol
+			echo 6 > functions/hid.GS2/report_length
+			echo -ne \\x05\\x01\\x09\\x02\\xa1\\x01\\x09\\x01\\xa1\\x00\\x05\\x09\\x19\\x01\\x29\\x03\\x15\\x00\\x25\\x01\\x95\\x03\\x75\\x01\\x81\\x02\\x95\\x01\\x75\\x05\\x81\\x01\\x05\\x01\\x09\\x30\\x09\\x31\\x15\\x00\\x26\\xff\\x7f\\x35\\x00\\x46\\xff\\x7f\\x75\\x10\\x95\\x02\\x81\\x02\\x05\\x01\\x09\\x38\\x15\\x81\\x25\\x7f\\x35\\x00\\x45\\x00\\x75\\x08\\x95\\x01\\x81\\x06\\xc0\\xc0 > functions/hid.GS2/report_desc
+			ln -s functions/hid.GS2 configs/c.1
+		fi
+
+		# adbd
+		if [ -e /boot/usb.adbd ]
+		then
+			echo 0x18d1 > idVendor  # google
+			mkdir -p configs/c.1/strings/0x409
+			echo "" > configs/c.1/strings/0x409/configuration
+			echo 0x80 > configs/c.1/bmAttributes
+			mkdir functions/ffs.adb
+			ln -s functions/ffs.adb configs/c.1/
+			mkdir -p /dev/usb-ffs/adb
+			mount -t functionfs adb /dev/usb-ffs/adb/
+			/usr/bin/adbd &
+			for i in $(seq 1 40); do
+				if [ -e /dev/usb-ffs/adb/ep2 ]; then
+					break
+				fi
+				sleep 0.1
+			done
+		fi
+		while true; do
+			ls /sys/class/udc/ | cat > UDC || true
+			res=$(cat UDC)
+			if [[ "x$res" != "x" ]]; then
+				break
+			fi
+			sleep 0.4
+		done
+		echo device > /proc/cviusb/otg_role
+	fi
+fi
+
+if [ "$1" = "stop" ]
+then
+	echo '' > /sys/kernel/config/usb_gadget/g0/UDC
+	echo host > /proc/cviusb/otg_role
+	# uvc
+	if [ -e /sys/kernel/config/usb_gadget/g0/configs/c.1/uvc.usb0 ]
+	then
+		/etc/init.d/uvc_tool.sh unmount
+	fi
+
+	# rndis
+	if [ -e /sys/kernel/config/usb_gadget/g0/configs/c.1/rndis.usb0 ]
+	then
+		unlink /sys/kernel/config/usb_gadget/g0/configs/c.1/rndis.usb0
+		rmdir /sys/kernel/config/usb_gadget/g0/functions/rndis.usb0
+	fi
+
+	# ncm
+	if [ -e /sys/kernel/config/usb_gadget/g0/configs/c.1/ncm.usb0 ]
+	then
+		unlink /sys/kernel/config/usb_gadget/g0/configs/c.1/ncm.usb0
+		rmdir /sys/kernel/config/usb_gadget/g0/functions/ncm.usb0
+	fi
+fi
+