USB_RNDIS

rndis_config.sh

#!/bin/sh

VID=0x0525
PID=0xa4a1

UDC=`ls /sys/class/udc/` # UDC=13500000.otg

prg_name=$0
status=$1


# 配置rndis设备
rndis_start() {
    echo "Creating the USB gadget..."
    mount -t configfs none /sys/kernel/config

    mkdir /sys/kernel/config/usb_gadget/rndis_demo
    cd /sys/kernel/config/usb_gadget/rndis_demo

    # 配置设备描述符
    echo "Setting Device Descriptor..."
    echo "0x02" > bDeviceClass
    echo "0x00" > bDeviceSubClass
    echo "0x00" > bDeviceProtocol
    echo "0x0200" > bcdUSB
    echo "0x0000" > bcdDevice
    echo $VID > idVendor
    echo $PID > idProduct

    #配置字符串描述符
    echo "Setting English strings..."
    mkdir strings/0x409
    echo "INGENIC" > strings/0x409/manufacturer
    echo "Ethernet Gadget" > strings/0x409/product
    echo "ingenic-ether" > strings/0x409/serialnumber

    #配置配置描述符
    echo "Creating Config..."
    mkdir configs/c.1
    echo "120" > configs/c.1/MaxPower
    echo "0x80" > configs/c.1/bmAttributes
    mkdir configs/c.1/strings/0x409
    echo "INGENIC" > configs/c.1/strings/0x409/configuration

    #配置功能描述符
    echo "Creating functions..."
    mkdir functions/rndis.0

    ln -s functions/rndis.0 configs/c.1

    echo $UDC > UDC
}

# 卸载rndis设备
rndis_stop() {
    echo "stopping the USB gadget"

    cd /sys/kernel/config/usb_gadget/rndis_demo

    echo "Unbinding USB Device controller..."
    echo "" > UDC

    echo "Deleting rndis gadget functionality : rndis.0"
    rm configs/c.1/rndis.0
    rmdir functions/rndis.0

    echo "Cleaning up configuration..."
    rmdir configs/c.1/strings/0x409
    rmdir configs/c.1

    echo "cleaning English string..."
    rmdir strings/0x409

    echo "Removing gadget directory..."
    cd -
    rmdir /sys/kernel/config/usb_gadget/rndis_demo/

    umount /sys/kernel/config
}

case "$status" in
  start)
    if [ "$#" != "1" ]; then
        echo "Usage1: $prg_name <start|stop>"
        exit 1
    fi

    if [ -d /sys/kernel/config/usb_gadget ]; then
        echo "Error: usb configfs already mounted"
        exit 1
    fi

    # 配置rndis设备
    rndis_start
    ;;

  stop)
    if [ "$#" != "1" ]; then
        echo "Usage: $prg_name <start|stop>"
        exit 1
    fi

    if [ ! -d /sys/kernel/config/usb_gadget/rndis_demo/ ]; then
        echo "Error: usb configfs rndis_demo uninitialized"
        exit 1
    fi

    # 卸载rndis设备
    rndis_stop
    ;;
    *)
    echo "Usage: $prg_name <start|stop>"
    exit 1
esac