#!/bin/sh
#
# Copyright (c) 2012-2015, 2018, The Linux Foundation. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in the
#       documentation and/or other materials provided with the distribution.
#     * Neither the name of The Linux Foundation nor the names of its
#       contributors may be used to endorse or promote products derived from
#       this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE DISCLAIMED.  IN NO
# EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# Starts the USB Android Gadget.
export KERNEL=`uname -r`
export SOFTAP_W_DUN="N"
export ANDROID_LOG_TAGS="*:d"
export LS_COLORS="none"

case "$1" in
  start)
	if [ -d /sys/class/android_usb/android0/f_ffs ]
	then
		echo adb > /sys/class/android_usb/android0/f_ffs/aliases
	fi

	# get soc platform to update product related information
	if [ -f /sys/devices/soc0/hw_platform ]; then
		socplatform=`cat /sys/devices/soc0/machine` 2> /dev/null
		soc_hwplatform=`cat /sys/devices/soc0/hw_platform`
		soc_subtypeid=`cat /sys/devices/soc0/platform_subtype_id`
	else
		socplatform=`cat /sys/devices/system/soc/soc0/machine` 2> /dev/null
	fi
	echo "soc:" $socplatform

	# find serialno from cmdline
	serialno=`cat /proc/cmdline | grep -o "androidboot.serialno=[A-Za-z0-9]*" | cut -d "=" -f2`
	if [ "$serialno" == "" ]; then
		echo "serialno not found with cmdline, use default"
		serialno="12345678"
	fi
	echo "serialno:" $serialno

	msm_serial=`cat /sys/devices/soc0/serial_number`
	msm_serial_hex=`printf %08X $msm_serial`
	product_string="$socplatform-$soc_hwplatform _SN:$msm_serial_hex"

	# try to mount configfs, and create instance of USB functions if it goes through
	mount -t configfs none /sys/kernel/config
	if [ -d /sys/kernel/config/usb_gadget ]; then
		echo "Configuring the USB gadget using ConfigFS..."
		cd /sys/kernel/config/usb_gadget
		mkdir g1
		cd g1
		mkdir strings/0x409
		mkdir configs/c.1
		mkdir configs/c.1/strings/0x409
		mkdir functions/mass_storage.0
		mkdir functions/mass_storage.1
		mkdir functions/ffs.adb
		mkdir functions/diag.diag
		mkdir functions/cser.dun.0
		mkdir functions/cser.nmea.1
		mkdir functions/gser.0
		mkdir functions/rmnet_bam.rmnet
		mkdir functions/gsi.rmnet
		mkdir functions/gsi.rndis
		mkdir functions/gsi.ecm
		mkdir functions/gsi.mbim
		mkdir functions/gsi.dpl
		mkdir functions/gsi.gps
		mkdir functions/ncm.0
		mkdir functions/qdss.qdss
		mkdir functions/uac1.uac1
		if [ ! -s "/etc/adb_devid" ]
		then
			echo $serialno > /etc/adb_devid
			sync
		fi
		cat /etc/adb_devid > strings/0x409/serialnumber
		echo "QCOM" > strings/0x409/manufacturer
		echo "$product_string" > strings/0x409/product
		setprop sys.usb.configfs 1
		cd /
	fi

	if [ -d /sys/class/android_usb/android0 ]
	then
		echo "$product_string" > /sys/class/android_usb/android0/iProduct
	fi

	# mount functionfs
	mkdir -p /dev/usb-ffs/adb
	mount -o uid=2000,gid=2000 -t functionfs adb /dev/usb-ffs/adb
	mount -o remount,gid=5,mode=620 /dev/pts

	case `source /sbin/usb/target` in
		*9x15* )
			# Nothing to do here for 9x15
			;;
		*9x25* )
			echo "Unbind EHCI HSIC host device driver"
			echo msm_hsic_host > /sys/bus/platform/drivers/msm_hsic_host/unbind
			;;
		*9x35* )
			echo "Unbind EHCI HSIC host device driver"
			echo f9a15000.hsic_host > /sys/bus/platform/drivers/msm_hsic_host/unbind
			echo 1 > /sys/devices/virtual/android_usb/android0/f_rndis_qc/max_pkt_per_xfer
			echo 3 > /sys/module/dwc3/parameters/bulk_ep_xfer_timeout_ms
			;;
		*8916* )
			echo 9091 > /etc/usb/boot_hsusb_comp
                        ;;
		*9640* )
			echo 16384 > /sys/module/g_android/parameters/rndis_dl_max_xfer_size
			;;
		*9650* )
			echo 16384 > /sys/module/g_android/parameters/gsi_in_rndis_aggr_size
			;;
		*sdx20* )
			echo Y > /sys/module/libcomposite/parameters/enable_l1_for_hs
			echo Y > /sys/module/dwc3/parameters/enable_dwc3_u1u2
			;;
		*8909* | *8053* | *8017* | *qcs605* | *qcs40x* )
			echo 901D > /etc/usb/boot_hsusb_comp
		        ;;
	esac

	# enable debug message
	if [ -f /sbin/usb/debuger/default_debug ];
	then
		rm -rf /sbin/usb/debuger/statusFile
		usb_debug -f on n /sbin/usb/debuger/default_debug
	fi

	# enable concurrent SoftAP and DUN
	if [ -f /data/usb/softap_w_dun ]
	then
		SOFTAP_W_DUN=`cat /data/usb/softap_w_dun`
	fi

	# boot hsic composition:
	if [ -d /sys/class/android_usb/android1 ]
	then
		pid=`cat /etc/usb/boot_hsic_comp`
		/sbin/usb/compositions/$pid y
		# let hsic compostion script run before starting hsusb
		sleep 1
	fi

	# boot hsusb composition:
	if [ -d /sys/class/android_usb/android0 ]
	then
		pid=`cat /etc/usb/boot_hsusb_comp`
		/sbin/usb/compositions/$pid n

		if [ "$SOFTAP_W_DUN" == "Y" ]
		then
			echo "DUN+SOFTAP mode is enabled."
			echo 1  > /sys/devices/virtual/android_usb/android0/f_serial/dun_w_softap_enable
		fi
	fi
	;;

  stop)
        echo "Stopping USB Android Gadget"
        ;;

  restart)
        $0 stop
        $0 start
        ;;
  *)
        echo "Usage usb { start | stop | restart}" >&2
        exit 1
        ;;
esac