On Monday, February 08, 2016 at 09:41:09 AM, Hannes Schmelzer wrote: > On 04.02.2016 12:28, Marek Vasut wrote: > > On Thursday, February 04, 2016 at 09:21:08 AM, Schrempf Frieder wrote: > >> On 03.02.2016 20:16, Sergei Temerkhanov wrote: > >>> On Wed, Feb 3, 2016 at 8:40 AM, Marek Vasut <ma...@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 <ma...@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? > > > > Nice! Can you share which sticks are those, ideally brand/type and USB > > IDs ? > > Hi, > that tip works also on my ZYNQ board. > > There is some comment around this 'magic-define': > > /* > * The U-Boot EHCI driver can handle any transfer length as long as > there is > * enough free heap space left, but the SCSI READ(10) and WRITE(10) > commands are > * limited to 65535 blocks. > */ > > Can i assume that 16MiB free heap space is enough if i want read a 16MiB > file ?
The file is actually not read into a buffer on a heap iirc, but directly to the target location if that's in RAM. Best regards, Marek Vasut _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
