Enable USB for OpenWrt

在配置openwrt编译系统过程中，除了基本的配置外，如果还要支持USB挂载、文件系统、语言等内容，那么就需要在#make menuconfig界面下配置以下各项:
####添加USB相关支持 Kernel modules —> USB Support —> <>kmod-usb-core.
Kernel modules —> USB Support —> <> kmod-usb-ohci. #old usb1.0
Kernel modules —> USB Support —> <> kmod-usb-uhci. #usb1.1
Kernel modules —> USB Support —> <> kmod-usb-storage.
Kernel modules —> USB Support —> <> kmod-usb-storage-extras.
Kernel modules —> USB Support —> <> kmod-usb2. #usb2.0
####添加USB挂载 Base system —> <>block-mount
Utilities —> Filesystem —> <> badblocks
Utilities —> <> usbutils…………………………….. USB devices listing utilities
Utilities —> disc —> <> fdisk……………………………… manipulate disk partition table
####添加文件系统支持 Kernel modules —> Filesystems —> <> kmod-fs-ext4 (移动硬盘EXT4格式选择)
Kernel modules —> Filesystems —> <> kmod-fs-vfat(FAT16 / FAT32 格式选择)
Kernel modules —> Filesystems —> <> kmod-fs-ntfs (NTFS 格式选择)
####添加UTF8编码,CP437编码，ISO8859-1编码 Kernel modules —> Native Language Support —> <> kmod-nls-cp437
Kernel modules —> Native Language Support —> <> kmod-nls-iso8859-1
Kernel modules —> Native Language Support —> <> kmod-nls-utf8

以上几步也可以在系统中用opgk install安装相应的驱动来实现。 ####自动挂载脚本（可根据需要改动,参考\http://blog.csdn.net/gubenpeiyuan/article/details/8330660）以上几步完成后，编译并烧写系统到芯片上，在系统中编写自动挂载脚本。编辑/etc/hotplug.d/block/10-mount如下：

#!/bin/sh
 
# Copyright (C) 2009 OpenWrt.org  (C) 2010 OpenWrt.org.cn
 
blkdev=`dirname $DEVPATH`
if [ `basename $blkdev` != "block" ]; then
    device=`basename $DEVPATH`
    case "$ACTION" in
        add)
                mkdir -p /mnt/$device
                # vfat & ntfs-3g check
                if  [ `which fdisk` ]; then
                        isntfs=`fdisk -l | grep $device | grep NTFS`
                        isvfat=`fdisk -l | grep $device | grep FAT`
                        isfuse=`lsmod | grep fuse`
                        isntfs3g=`which ntfs-3g`
                else
                        isntfs=""
                        isvfat=""
                fi 
                # mount with ntfs-3g if possible, else with default mount
                if [ "$isntfs" -a "$isfuse" -a "$isntfs3g" ]; then
                        ntfs-3g -o nls=utf8 /dev/$device /mnt/$device
                elif [ "$isvfat" ]; then
                        mount -t vfat -o iocharset=utf8,rw,sync,umask=0000, \
      dmask=0000,fmask=0000  /dev/$device /mnt/$device
                else
                        mount /dev/$device /mnt/$device
                fi
  if [ -f /dev/${device}/swapfile ]; then
   mkswap /dev/${device}/swapfile
   swapon /dev/${device}/swapfile
  fi
                ;;
        remove)
  if [ -f /dev/${device}/swapfile ]; then
   swapoff /dev/${device}/swapfile
  fi
                umount /dev/$device
                ;;
    esac
 
fi