求教：如题，210的开发板，接usb摄像头，甚至接U盘都识别为full speed USB device，而内核中是有EHCI的，在开发板启动信息里面能看到，这是为何呢，是不是开发板usb接口有问题呢？
接罗技C270输出信息如下：
[root@FriendlyARM /]# [   27.158131] usb 1-1: new high speed USB device number 2 using s5p-ehci
[   27.223298] hub 1-0:1.0: unable to enumerate USB device on port 1
[   27.598125] usb 2-1: new full speed USB device number 2 using s5p-ohci
[   27.758368] usb 2-1: not running at top speed; connect to a high speed hub
[   27.873679] uvcvideo: Found UVC 1.00 device <unnamed> (046d:0825)
[   27.973359] input: UVC Camera (046d:0825) as /devices/platform/s5p-ohci/usb2/2-1/2-1:1.0/input/input3
接另一摄像头输出信息如下：
[root@FriendlyARM /]# [  877.803360] usb 1-1: new high speed USB device number 20 using s5p-ehci
[  878.022755] uvcvideo: Found UVC 1.00 device USB 2.0 Camera (1b17:0210)
[  878.036446] input: USB 2.0 Camera as /devices/platform/s5p-ehci/usb1/1-1/1-1:1.0/input/input5
[  878.079804] usb 1-1: USB disconnect, device number 20
[  878.343361] usb 1-1: new high speed USB device number 21 using s5p-ehci
[  878.408525] hub 1-0:1.0: unable to enumerate USB device on port 1
[  878.783354] usb 2-1: new full speed USB device number 5 using s5p-ohci
[  878.931652] usb 2-1: not running at top speed; connect to a high speed hub
[  878.982597] uvcvideo: Found UVC 1.00 device USB 2.0 Camera (1b17:0210)
[  879.000905] input: USB 2.0 Camera as /devices/platform/s5p-ohci/usb2/2-1/2-1:1.0/input/input6

你用的底板是哪个

就是这个板子：
http://item.taobao.com/item.htm?spm=a1z10.5.w4002-4851414909.11.kl1SAi&id=19750996087

你可以看看内核配置是不是USB 2.0，一般USB 2.0稳定性不是很好，特别是接3G模块的时候

用的友善光盘里的images,没有自己编译内核。但是内核应该是有配置EHCI HCD (USB 2.0) support 的，因为在开发板启动信息里有看到ehci。换了一块smart210的板子，一切正常了，能识别为high speed device。这是不是tiny210板子的问题呢？

楼主，我用的tiny210，usb和你出现同样的问题了，该怎么解决

我开发板usb接口有问题，高速（echi）没用起来,换了一块板子，Smart210的，就没问题了