Slightly off-topic, USB code in Linux working, but fails in U-Boot

2014-02-09 Thread Ben Collins
(not sub'd, so please Cc) Hello all, Unfortunately, similar reports on the U-Boot mailing list have been met with no useful information. I'm asking here because 1) the setup works on Linux, and 2) there are a lot of knowledgable USB folks here. That being said, my issue has to do with a Freesc

Re: Slightly off-topic, USB code in Linux working, but fails in U-Boot

2014-02-09 Thread Ben Collins
On Feb 9, 2014, at 9:38 PM, Peter Chen wrote: >> >> >> Unfortunately, similar reports on the U-Boot mailing list have been met >> with no useful information. I'm asking here because 1) the setup works on >> Linux, and 2) there are a lot of knowledgable USB folks here. >> >> That being said, my

Re: Slightly off-topic, USB code in Linux working, but fails in U-Boot

2014-02-13 Thread Ben Collins
On Feb 13, 2014, at 10:19 AM, Alan Stern wrote: >> Since I can't see device IN response for setup stage from your capture >> log, but I assume the device is ok. > > If the SETUP packet is invalid, the device won't respond to it. If the > SETUP packet is valid, the device MUST respond with ACK.

Re: Slightly off-topic, USB code in Linux working, but fails in U-Boot

2014-02-13 Thread Ben Collins
On Feb 13, 2014, at 10:19 AM, Alan Stern wrote: > On Thu, 13 Feb 2014, Peter Chen wrote: > - If you have a usb bus analyzer, please check if the GET_DESCRPTOR sends out successfully. (Most probably, I don't think it sends out) >>> >>> I've attached a screen cap of the USB capture