M7350/system/core/usb/start_usb

#!/bin/sh
#
# Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
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# Starts the USB Android Gadget.

export KERNEL=`uname -r`
export SOFTAP_W_DUN="N"

COMP_DIR="/sbin/usb/compositions"
symlink_hsusb="/sbin/usb/boot_hsusb_composition"
symlink_hsic="/sbin/usb/boot_hsic_composition"

case "$1" in
  start)
	if [ -d /sys/class/android_usb/android0/f_ffs ]
	then
		echo adb > /sys/class/android_usb/android0/f_ffs/aliases
		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
		mkdir -p /system/bin
		ln -s /bin/sh  /system/bin/sh
	fi

        case $KERNEL in
          3.*)
		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
			;;
			*8909* )
			ln -fs /sbin/usb/compositions/9091 \
				/sbin/usb/boot_hsusb_composition
			;;
			*9640* )
			echo 16384 > /sys/module/g_android/parameters/rndis_dl_max_xfer_size
			;;
		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 /sbin/usb/softap_w_dun ]
		then
			SOFTAP_W_DUN=`cat /sbin/usb/softap_w_dun`
		fi

		# boot hsic composition:
		if [ -d /sys/class/android_usb/android1 ]
		then
			/sbin/usb/boot_hsic_composition y
			# let hsic compostion script run before starting hsusb
			sleep 1
		fi

		# boot hsusb composition:
		if [ -d /sys/class/android_usb/android0 ]
		then
            # settings
           default_pid="9025"
           default_user_pid="tplink"
           default_debug_pid=$default_pid
           current_mode="`uci get usb_enum.enum.mode`"
           current_debug_pid="`uci get usb_enum.enum.debug_pid`"

           # if device code is not burned
           if [ "`uci get state_ctrl.property.code_is_burned`" != "1" ]
           then
               echo "DEVICE_CODE is not burned. Set to default debug mode"
               current_mode="debug"
               current_debug_pid=$default_debug_pid
               uci set usb_enum.enum.mode="debug"
               uci set usb_enum.enum.debug_pid=$default_debug_pid
               uci commit usb_enum
           else
                case "`uci get product.info.product_type`" in
                    "mr200-eu-v2" | "mr6400-eu-v2" )
                        current_mode="user"
                        uci set usb_enum.enum.mode="user"
                        uci commit usb_enum
                        ;;
                esac
           fi

           # test default user_pid
           if [ ! -f ${COMP_DIR}/${default_user_pid} ]
           then
               echo "PID_${default_user_pid} not exist"
               default_user_pid=$default_pid
           fi

           # test current debug_pid
           if [ ! -f ${COMP_DIR}/${current_debug_pid} ]
           then
               echo "PID_${current_debug_pid} not exist"
               current_debug_pid=$default_debug_pid
               uci set usb_enum.enum.debug_pid=$current_debug_pid
               uci commit usb_enum
           fi

           # test "fastboot oem factory"
           if [ -n "`cat /proc/cmdline | grep "tplink.fm=1"`" ]
           then
               uci set usb_enum.enum.mode="debug"
               uci set usb_enum.enum.debug_pid=$default_debug_pid
               uci commit usb_enum
               ln -fs ${COMP_DIR}/${default_debug_pid} ${symlink_hsusb}
           else
               if [ $current_mode = "user" ]
               then
                   ln -fs ${COMP_DIR}/${default_user_pid} ${symlink_hsusb}
               elif [ $current_mode = "debug" ]
               then
                   ln -fs ${COMP_DIR}/${current_debug_pid} ${symlink_hsusb}
               else
                   uci set usb_enum.enum.mode="debug"
                   uci set usb_enum.enum.debug_pid=$current_debug_pid
                   uci commit usb_enum
                   ln -fs ${COMP_DIR}/${current_debug_pid} ${symlink_hsusb}
               fi
           fi

           ${symlink_hsusb} 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

		;;
          2.*)
                # Nothing to do for 2.x kernels
                ;;
          *)
                # Some other version of kernel?
                ;;
        esac
        ;;

  stop)
        echo "Stopping USB Android Gadget"
        ;;

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