Hi, (I can't answer private queries. Please, always Cc the public mailing list) Antonio Santagiuliana <santantonioswap@xxxxxxxxx> writes: > Hello > I am using RaspberryPI for a project and we want to connect 16 USB to UART > bridges ( at the moment we are using 8 dual UART cp2105 from Silicon Labs ). > I have seen your page at : > https://dri.freedesktop.org/docs/drm/driver-api/usb/dwc3.html > so I was trying to get tracefs output. > Problem is that on the /t/events subfolder I cannot find the > dwc3/enable because > there is not any /dwc3 in /t/events. > Because of this I cannot set echo 1 > /t/events/dwc3/enable > as instead your page says I should do. > I can only find */t/events/enable* should I activate that ? > running usb-devices command I get this about the drivers loaded : > > T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 1 > D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1 > P: Vendor=1d6b ProdID=0002 Rev=04.14 > S: Manufacturer=Linux 4.14.39 dwc_otg_hcd You're not using dwc3. That's dwc2, instead. Also, dwc3 tracepoints are peripheral side only. Host side is a standard xhci, so you would use xhci tracepoints for that. Still, you're using dwc2 from what I can tell. Minas is the maintainer of that driver. > S: Product=DWC OTG Controller > S: SerialNumber=3f980000.usb > C: #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=0mA > I: If#=0x0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub > > T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=480 MxCh= 5 > D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=02 MxPS=64 #Cfgs= 1 > P: Vendor=0424 ProdID=9514 Rev=02.00 > C: #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=2mA > I: If#=0x0 Alt= 1 #EPs= 1 Cls=09(hub ) Sub=00 Prot=02 Driver=hub > > T: Bus=01 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#= 3 Spd=480 MxCh= 0 > D: Ver= 2.00 Cls=ff(vend.) Sub=00 Prot=01 MxPS=64 #Cfgs= 1 > P: Vendor=0424 ProdID=ec00 Rev=02.00 > C: #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=2mA > I: If#=0x0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=ff Driver=smsc95xx > > T: Bus=01 Lev=02 Prnt=02 Port=01 Cnt=02 Dev#= 14 Spd=480 MxCh= 4 > D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1 > P: Vendor=0409 ProdID=005a Rev=01.00 > C: #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=100mA > I: If#=0x0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub > > T: Bus=01 Lev=03 Prnt=14 Port=00 Cnt=01 Dev#= 15 Spd=12 MxCh= 0 > D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 > P: Vendor=10c4 ProdID=ea70 Rev=01.00 > S: Manufacturer=Silicon Labs > S: Product=CP2105 Dual USB to UART Bridge Controller > S: SerialNumber=008714B9 > C: #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=100mA > I: If#=0x0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=vcpsilabs > I: If#=0x1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=vcpsilabs > > T: Bus=01 Lev=03 Prnt=14 Port=01 Cnt=02 Dev#= 16 Spd=12 MxCh= 0 > D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 > P: Vendor=10c4 ProdID=ea70 Rev=01.00 > S: Manufacturer=Silicon Labs > S: Product=CP2105 Dual USB to UART Bridge Controller > S: SerialNumber=0086F956 > C: #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=100mA > I: If#=0x0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=vcpsilabs > I: If#=0x1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=vcpsilabs > > T: Bus=01 Lev=03 Prnt=14 Port=02 Cnt=03 Dev#= 17 Spd=12 MxCh= 0 > D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 > P: Vendor=10c4 ProdID=ea70 Rev=01.00 > S: Manufacturer=Silicon Labs > S: Product=CP2105 Dual USB to UART Bridge Controller > S: SerialNumber=00870FBD > C: #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=100mA > I: If#=0x0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=vcpsilabs > I: If#=0x1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=vcpsilabs > > T: Bus=01 Lev=03 Prnt=14 Port=03 Cnt=04 Dev#= 18 Spd=480 MxCh= 4 > D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1 > P: Vendor=0409 ProdID=005a Rev=01.00 > C: #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=100mA > I: If#=0x0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub > > T: Bus=01 Lev=04 Prnt=18 Port=00 Cnt=01 Dev#= 19 Spd=12 MxCh= 0 > D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 > P: Vendor=10c4 ProdID=ea70 Rev=01.00 > S: Manufacturer=Silicon Labs > S: Product=CP2105 Dual USB to UART Bridge Controller > S: SerialNumber=00870E54 > C: #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=100mA > I: If#=0x0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=vcpsilabs > I: If#=0x1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=vcpsilabs > > T: Bus=01 Lev=04 Prnt=18 Port=01 Cnt=02 Dev#= 20 Spd=12 MxCh= 0 > D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 > P: Vendor=10c4 ProdID=ea70 Rev=01.00 > S: Manufacturer=Silicon Labs > S: Product=CP2105 Dual USB to UART Bridge Controller > S: SerialNumber=00870B3F > C: #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=100mA > I: If#=0x0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=vcpsilabs > I: If#=0x1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=vcpsilabs > > T: Bus=01 Lev=04 Prnt=18 Port=02 Cnt=03 Dev#= 21 Spd=12 MxCh= 0 > D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 > P: Vendor=10c4 ProdID=ea70 Rev=01.00 > S: Manufacturer=Silicon Labs > S: Product=CP2105 Dual USB to UART Bridge Controller > S: SerialNumber=0086F938 > C: #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=100mA > I: If#=0x0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=vcpsilabs > I: If#=0x1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=vcpsilabs > > T: Bus=01 Lev=04 Prnt=18 Port=03 Cnt=04 Dev#= 22 Spd=12 MxCh= 0 > D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 > P: Vendor=10c4 ProdID=ea70 Rev=01.00 > S: Manufacturer=Silicon Labs > S: Product=CP2105 Dual USB to UART Bridge Controller > S: SerialNumber=00870981 > C: #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=100mA > I: If#=0x0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=vcpsilabs > I: If#=0x1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=vcpsilabs > > T: Bus=01 Lev=02 Prnt=02 Port=03 Cnt=03 Dev#= 23 Spd=12 MxCh= 0 > D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 > P: Vendor=10c4 ProdID=ea70 Rev=01.00 > S: Manufacturer=Silicon Labs > S: Product=CP2105 Dual USB to UART Bridge Controller > S: SerialNumber=0086E7E6 > C: #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=100mA > I: If#=0x0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=vcpsilabs > I: If#=0x1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=vcpsilabs > > > > > thank you very much for your page , very interesting. > > > Kind Regards > Antonio Santagiuliana -- balbi
