[Gumstix-users] Overo serial to USB problems

[Markus S. <msv...@ae...>]

Dear Gumstix Users,

I am having trouble getting a Belkin F5U409 serial-to-USB converter to 
work with my Overo Air. I am using a Tobi expansion board, which 
provides a USB host connector.

When I plug the Belkin converter in, the Overo displays the following 
message:

hub 2-0:1.0: unable to enumerate USB device on port 2

After this, the Overo no longer responds when USB devices are connected 
and disconnected.

A friend more knowledgeable in Linux than me suggested I try starting 
the USB serial modules. I rebooted, then did this:

root@overo:~# modprobe belkin_sa
usbcore: registered new interface driver usbserial
USB Serial support registered for generic
usbcore: registered new interface driver usbserial_generic
usbserial: USB Serial Driver core
USB Serial support registered for Belkin / Peracom / GoHubs USB Serial 
Adapter
usbcore: registered new interface driver belkin
belkin_sa: v1.2:USB Belkin Serial converter driver

No luck, the "unable to enumerate" message still appears. Again, the 
Overo stopped responding to USB devices connected and disconnected.

Here is dmesg output after loading the serial modules, and connecting 
the Belkin device:

usbcore: registered new interface driver usbserial
USB Serial support registered for generic
usbcore: registered new interface driver usbserial_generic
usbserial: USB Serial Driver core
USB Serial support registered for Belkin / Peracom / GoHubs USB Serial 
Adapter
usbcore: registered new interface driver belkin
belkin_sa: v1.2:USB Belkin Serial converter driver
usb usb2: usb resume
ehci-omap ehci-omap.0: resume root hub
hub 2-0:1.0: hub_resume
ehci-omap ehci-omap.0: GetStatus port 2 status 001803 POWER sig=j CSC 
CONNECT
hub 2-0:1.0: port 2: status 0501 change 0001
hub 2-0:1.0: state 7 ports 3 chg 0004 evt 0000
hub 2-0:1.0: port 2, status 0501, change 0000, 480 Mb/s
ehci-omap ehci-omap.0: port 2 full speed --> companion
ehci-omap ehci-omap.0: GetStatus port 2 status 003801 POWER OWNER sig=j 
CONNECT
hub 2-0:1.0: port 2 not reset yet, waiting 50ms
ehci-omap ehci-omap.0: GetStatus port 2 status 003002 POWER OWNER 
sig=se0 CSC
hub 2-0:1.0: unable to enumerate USB device on port 2
hub 2-0:1.0: state 7 ports 3 chg 0000 evt 0004
hub 2-0:1.0: hub_suspend
usb usb2: bus auto-suspend
ehci-omap ehci-omap.0: suspend root hub

Has anyone else had this problem?
It was mentioned to me that the GPIO configuration might be connected to 
this issue. Is this possible?

I am using the kernel 2.6.32 and filesystem image that shipped on the 
Overo. It was shipped a few weeks ago.

Any help would be greatly appreciated.

Best regards,
Markus.