LayerscapeのトピックRe: LS1021A USB 3.0 problem

LS1021A - USB 3.0 controller as USB 2.0 problem

hwei — Tue, 12 Jul 2016 15:45:14 GMT

Hi,

I have a question about the USB3.0 controller.

Can I just connect the USB2.0 part (just USB1_D_M/P)of the USB3.0 PHYs and treat the USB3.0 controller as an USB2.0 one? Is it a possible/right method?

We follow did some design like this and it seems the USB3.0 controller cannot work properly. Do I need any special setting to make it work as an USB2.0 controller?

It prompts:

usb 1-1: new high-speed USB device number 2 using xhci-hcd
usb 1-1: Device not responding to set address.
usb 1-1: Device not responding to set address.
usb 1-1: device not accepting address 2, error -71
usb 1-1: new high-speed USB device number 3 using xhci-hcd
usb 1-1: Device not responding to set address.
usb 1-1: Device not responding to set address.
usb 1-1: device not accepting address 3, error -71
...

Thanks.

Re: LS1021A USB 3.0 problem

ufedor — Tue, 12 Jul 2016 17:52:50 GMT

> We follow this and it seems the USB3.0 controller cannot work properly.

What you have done?

What are the results?

Is USB_GHWPARAMS3[DWC_USB3_SSPHY_INTERFACE]=0? (to disable the USB3 PHY)

Re: LS1021A USB 3.0 problem

hwei — Tue, 12 Jul 2016 20:17:40 GMT

Hi ufedor,

Do I need some specific software settings? Should I use usb2.0 driver instead of the default usb3.0 driver?

I found there is something like "usb 2.0 only mode" in RM, but I cannot find any details.

The error from kernel log:

usb 1-1: new high-speed USB device number 2 using xhci-hcd

usb 1-1: Device not responding to set address.

usb 1-1: device not accepting address 2, error -71

I tried to set USB_GHWPARAMS3[DWC_USB3_SSPHY_INTERFACE] to 0 but it didn't change. Should I change some extra register?

Thanks.

Re: LS1021A USB 3.0 problem

ufedor — Thu, 14 Jul 2016 04:45:56 GMT

Could you please check whether a USB 3.0 device is properly recognized in your system?