On 23 August 2013 11:54, Benoît Thébaudeau benoit.thebaudeau@advansee.com wrote:
Dear Marek, Andrew,
...
This is the kind of issue that made me create this (discarded) patch at some point: http://patchwork.ozlabs.org/patch/176527/
Can you try it? I'm not sure that it will be helpful for your specific case.
Unfortunately it has no effect. But then the STATUS phase isn't stalling in my case, it's just giving back an unexpected value for CSWSIGNATURE - I have no idea why this is.
I also have this issue with some devices and mainline U-Boot. I can confirm that this is a device initialization delay issue because subsequent USB commands on the device succeed (only the single automatic U-Boot USB command that I use at boot time fails).
You may be able to work around these by setting CONFIG_USB_HUB_MIN_POWER_ON_DELAY in your config file (assuming the device is behind a hub).
Best regards, Benoît
Andrew Murray