Hi, Kirill Dronov <cyrill.dronov@xxxxxxxxx> writes: > I'm working on USB device bringup on Intel E3800 – based board. DWC3 > core configured as DRD in device mode. The only connected device phy > is SMSC 3310 (USB2 ULPI). DWC3 core version is 2.10A. Gadget zero > driver can be loaded, but device enumeration fails: device is detected > by host, speed is negotiated (HS), host successfully reset device. On > device side – conndone interrupt is followed by linksts change with > link_state 0. Then host sends USBREQ_GET_DESCRIPTOR and tries to set > address but device does not react – no events generated. which kernel are you using ? Please collect driver traces and send them to us: # mount -t debugfs none /sys/kernel/debug # cd /sys/kernel/debug/tracing # echo 2048 > buffer_size_kb # echo 1 > events/dwc3/enable (now trigger the problem) # cp trace /path/to/non/volatile/media/ Send that trace file (you need to compress it, probably) > I'm not sure if I hit “run/stop metastability” issue [“STAR#9000525659: > Clock Domain Crossing on DCTL in USB 2.0 Mode”]. I don't have DWC3 we have a workaround for that, you shouldn't hit it unless you removed the workaround. > databook or erratum description (other than mentioned in driver code). > Can somebody provide more detailed description of STAR#9000525659? > Where can I get DWC3 Databook? you need to talk to a Synopsys representative for that. -- balbi
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