Hi, I'm using an RT3052F device (DIR-620 SOHO wifi router) with current OpenWrt trunk and its USB port is handled by the dwc_otg driver. The source is available from their repository: https://dev.openwrt.org/browser/trunk/target/linux/ramips/files/drivers/usb/dwc_otg The problem appears when i connect a meteo-station (which is a low-speed HID device) to the router via a high-speed hub (which i need to connect additional USB mass storage). Basically, everything works fine for a while (~15 minutes) but then the communication is fully disrupted and even physically unplugging or plugging the devices has no visible effect in dmesg. I've tested several different high-speed hubs, with any of them i observed the same symptoms. Full-speed hubs do not work at all (a connected device can not be even enumerated). I've not tried forcing full-speed mode for dwc_otg by hacking the sources directly, so no experimental data about it available yet. So apparently not only Bulk endpoints are affected and there're still some rather nasty bugs to fix. Unfortunately, i have no idea whatsoever what i can do to help here. For your reference here's the meteo station connected via a high-speed hub: root@OpenWrt:~# cat /proc/bus/usb/devices T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 1 B: Alloc= 0/800 us ( 0%), #Int= 1, #Iso= 0 D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1 P: Vendor=1d6b ProdID=0002 Rev= 3.03 S: Manufacturer=Linux 3.3.8 dwc_otg S: Product=DWC OTG Controller S: SerialNumber=dwc_otg.0 C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=256ms T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=480 MxCh= 4 D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1 P: Vendor=058f ProdID=6254 Rev= 1.00 C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=100mA I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub E: Ad=81(I) Atr=03(Int.) MxPS= 1 Ivl=256ms T: Bus=01 Lev=02 Prnt=02 Port=03 Cnt=01 Dev#= 3 Spd=1.5 MxCh= 0 D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 P: Vendor=0fde ProdID=ca01 Rev= 3.02 S: Product=Universal Bridge C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=100mA I:* If#= 0 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=00 Prot=00 Driver=(none) E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=1ms -- Be free, use free (http://www.gnu.org/philosophy/free-sw.html) software! mailto:fercerpav@xxxxxxxxx -- 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
