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AM3517 USB problem with linux2.6.37 kernel

weng lucheng
Prodigy 25 points
Other Parts Discussed in Thread: AM3517, DM3730

Hi,  

   We have designed a board with AM3517,we use USB3320 chip as host phy on USB port1 connected with ULPI interface.   The linux kernel version is "linux-2.6.37-psp04.02.00.07.sdk".   When I connected a usb massage storage device to the USB phy,some error message appear to the console as following.    

 root@am3517-evm:/dev# [  156.749877] usb 1-1: new high speed USB device using ehci-omap and address 2
[  157.304412] usb 1-1: device not accepting address 2, error -71
[  157.429412] usb 1-1: new high speed USB device using ehci-omap and address 3
[  157.569976] usb 1-1: device descriptor read/64, error -71
[  158.226226] usb 1-1: device not accepting address 3, error -71
[  158.351226] usb 1-1: new high speed USB device using ehci-omap and address 4
[  158.780975] usb 1-1: device not accepting address 4, error -71
[  158.906005] usb 1-1: new high speed USB device using ehci-omap and address 5
[  159.335479] usb 1-1: device not accepting address 5, error -71
[  159.341735] ehci-omap ehci-omap.0: port 1 cannot be enabled
[  159.349212] ehci-omap ehci-omap.0: Maybe your device is not a high speed device?
[  159.357910] ehci-omap ehci-omap.0: USB host (EHCI) controller does not support full speed or low speed device on it's root port.
[  159.371307] ehci-omap ehci-omap.0: Please connect full/low speed device via a high speed hub.
[  159.381256] hub 1-0:1.0: unable to enumerate USB device on port 1

But a board with DM3730 with the kernel of linux2.6.32 was OK! The hardware circuit is same.Do you think it is the difference of the kernel which leads to the problem?

  • 0
    TI__Guru**** 168311 points

    Without details it is hard to say it is hw or sw issue. But AM3517 and DM3730 use the same kernel source - omap3.git on Arago.So if you think the hw design is the same and it could be sw issue, I think you can run the .32 kernel on AM3517 and .37 kernel on DM3730 to see if that gives a clue.