On Sat, 2 Feb 2013, Mark Ferrell wrote: > On 02/02/2013 11:39 AM, Alan Stern wrote: > > Then the next step is to go into the appropriate subdirectory under > > /sys/kernel/debug/usb/ohci/ (the one that corresponds to the controller > > having problems) and see what the files in there say. > > The following output is from /sys/kernel/debug/usb/ohci/0000:00:0f.4 > when the OCHI bus appears to stop receiving data from the FTDI device, > but URB cleanup has not yet been attempted as there are still open > TTY's. Unfortunately the ports are already in a bad state at this point > so I do not know how useful it is. > > /sys/kernel/debug/usb/ohci/0000:00:0f.4/periodic: > size = 32 > 0 [ 11]: ed32/dd5f9040 (fs dev2 ep1in-int qlen 1 max 1 00011082) > > /sys/kernel/debug/usb/ohci/0000:00:0f.4/registers: > bus pci, device 0000:00:0f.4 > OHCI Host Controller > ohci_hcd > OHCI 1.0, NO legacy support registers, rh state running > control 0x2af RWC HCFS=operational BLE IE PLE CBSR=3 > cmdstatus 0x00004 SOC=0 BLF > intrstatus 0x00000024 FNO SF > intrenable 0x8000005a MIE RHSC UE RD WDH > ed_controlhead 1d5f90c0 > ed_bulkhead 1d5f9140 > ed_bulkcurrent 1d5f9300 > hcca frame 0x46d6 > fmintvl 0xa7782edf FIT FSMPS=0xa778 FI=0x2edf > fmremaining 0x8000222a FRT FR=0x222a > periodicstart 0x2a2f > lsthresh 0x0628 > hub poll timer off > roothub.a 03000204 POTPGT=3 NPS NDP=4(4) > roothub.b 00000000 PPCM=0000 DR=0000 > roothub.status 00008000 DRWE > roothub.portstatus [0] 0x00000103 PPS PES CCS > roothub.portstatus [1] 0x00000103 PPS PES CCS > roothub.portstatus [2] 0x00000103 PPS PES CCS > roothub.portstatus [3] 0x00000103 PPS PES CCS In $SUBJECT you say that the problem is associated with bulk transfers. Those are listed in the "async" file, which you did not report. Was the file empty? Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
