Linux 3.0新的USB gadget configfs.c驱动的用法如下所示:
挂载configfs文件系统:
# mount -t configfs none /sys/kernel/config
# cd /sys/kernel/config
# ls
usb_gadget
# cd usb_gadget
创建g1目录,实例化一个新的gadget模板:
# mkdir g1
# cd g1
# ls
UDC bDeviceProtocol bMaxPacketSize0 bcdUSB functions idVendor
bDeviceClass bDeviceSubClass bcdDevice configs idProduct strings
定义产品的VendorID和ProductID
# echo "0xabcd" > idVendor
# echo "0x1234" > idProduct
实例化英语ID:
# mkdir strings/0x409
# ls strings/0x409
manufacturer product serialnumber
将开发商、产品和序列号字符串写入内核:
# echo "0123456789ABCDEF" > strings/0x409/serialnumber
# echo "Master" > strings/0x409/manufacturer
# echo "Demo" > strings/0x409/product
创建功能实例,需要注意的是,一个功能如果有多个实例的话,扩展名必须用数字编号:
# mkdir functions/acm.GS0
# mkdir functions/acm.GS1
# mkdir functions/ecm.usb0
创建一个USB配置实例:
# mkdir configs/c.1
# ls configs/c.1
MaxPower bmAttributes strings
定义配置描述符使用的字符串
# mkdir configs/c.1/string/0x409
# ls configs/c.1/strings/0x409/
configuration
# echo "2XACM+ECM" > configfs/c.1/strings/0x409/configuration
捆绑功能实例到配置c.1
# ln -s functions/acm.GS0 configs/c.1
# ln -s functions/acm.GS1 configs/c.1
# ln -s functions/ecm.usb0 configs/c.1
查找本机可获得的UDC实例
# ls /sys/class/udc/
msm_hsusb
将gadget驱动注册到UDC上,插上USB线到电脑上,电脑就会枚举USB设备。
# echo "msm_hsusb" > UDC
Linux usb gadget configfs用法,布布扣,bubuko.com
原文地址:http://blog.csdn.net/zoosenpin/article/details/38224149