Hi, On Mon, Nov 11, 2013 at 07:38:14PM +0800, Yingchun Li wrote: > Hi, On my board, my musb works as host. my kernel version is 3.4.0. > The host cannot enumerate some low speed mouse normally,but if I add > an extersion cord (abour 1.5m) between the host and device, the mouse > can work normally. > If the enumeration fails, there is always a babble interrupt happen > just after the USB reset ,and the session would be stop(seems > automaticly stoped by the IP core). > From the sniffer, if the enumeration success, there is an EOP just > after the usb reset(about 2us), but if fails, there is no EOP,then > babble interrupt issued. > So anyone please give me some clue to dig? sorry, you're on your own using such an old kernel. You need to try with a more recent kernel such as v3.12. note that you didn't even bothered to merge all 68 stable releases the v3.4 kernel had. -- balbi
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