On Thu, 11 Mar 2010, Nuno Gonçalves wrote: > On power-on(device not discovered): > > root@OpenWrt:/# cat /sys/kernel/debug/usb/ehci/ar71xx-ehci/registers > bus platform, device ar71xx-ehci > Atheros AR91xx built-in EHCI controller > EHCI 1.00, hcd state 1 > structural params 0x00010011 > capability params 0x00000006 > status 0088 FLR > command 010009 (park)=0 ithresh=1 period=256 RUN > intrenable 37 IAA FATAL PCD ERR INT > uframe 0878 > port 1 status c001000 POWER sig=se0 > irq normal 0 err 0 reclaim 0 (lost 0) > complete 0 unlink 0 > > On restart(device discovered): > > root@OpenWrt:/# cat /sys/kernel/debug/usb/ehci/ar71xx-ehci/registers > bus platform, device ar71xx-ehci > Atheros AR91xx built-in EHCI controller > EHCI 1.00, hcd state 1 > structural params 0x00010011 > capability params 0x00000006 > status 40088 FLR > command 010009 (park)=0 ithresh=1 period=256 RUN > intrenable 37 IAA FATAL PCD ERR INT > uframe 2f18 > port 1 status 001805 POWER sig=j PE CONNECT > irq normal 13 err 0 reclaim 5 (lost 0) > complete 13 unlink 0 That's quite clear. If you compare the "port 1" lines, you'll see the difference. In the not-discovered case the hardware reports that nothing is plugged into the port, whereas in the other case it reports that there is a connection. There is a bug either in the EHCI hardware or in the platform driver. 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
