On 03.02.2016 20:16, Sergei Temerkhanov wrote:
On Wed, Feb 3, 2016 at 8:40 AM, Marek Vasut marex@denx.de wrote:
On Wednesday, February 03, 2016 at 12:49:20 PM, Schrempf Frieder wrote:
On 03.02.2016 12:12, Marek Vasut wrote:
On Wednesday, February 03, 2016 at 11:15:00 AM, Schrempf Frieder wrote:
On 03.02.2016 10:55, Fabio Estevam wrote:
On Wed, Feb 3, 2016 at 7:40 AM, Marek Vasut marex@denx.de wrote: > In that case, debug time. > > Usual problems are bad routing of the tracks on the board , so try > with USB 1.1 hub and if that works, that's your problem. Another suggestion would be to try the 100MB transfer in Linux and see if this works or not.
That would help us to narrow down whether this is a hardware or software problem.
Another thing to try may be limiting the value of USB_MAX_XFER_BLK in common/usb_storage.c
This was a really helpful hint! Thank you Sergei!
I just tried to limit USB_MAX_XFER_BLK to 1/8 of the original value (65535 -> 8191) and this time the transfer works without timeouts.
As we have a customer who needs this working as soon as possible my question now is how to properly solve this. Should I generally limit USB_MAX_XFER_BLK in my u-boot to avoid these errors? Which value to choose?