On Sunday 13 December 2015 05:49:24 Marek Vasut wrote: > On Sunday, December 13, 2015 at 05:47:18 AM, Stefan Brüns wrote: > > The configuration descriptor includes all interface, endpoint and > > auxiliary descriptors (e.g. report, union) so 512 may not be enough. > > > > Signed-off-by: Stefan Brüns <stefan.bru...@rwth-aachen.de> > > Can the size be determined in a dynamic manner instead of this ad-hoc > random number ?
Currently the buffer is allocated on the stack with ALLOC_CACHE_ALIGN_BUFFER in usb_select_config(... The buffer is passed to usb_get_configuration_no(...), but the buffer size is implicit. usb_get_configuration_no(...) already determines and checks the descriptor size, but as it can not readjust the buffer it just bails out if it is to small. The absolute maximum size for the descriptor is 64kB. So yes, this is possible, but needs a little bit more work. Kind regards, Stefan -- Stefan Brüns / Bergstraße 21 / 52062 Aachen home: +49 241 53809034 mobile: +49 151 50412019 work: +49 2405 49936-424 _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
