[U-Boot] Booting Wandboard through USB

[Tom Rini]

On Sat, May 30, 2015 at 10:41:16AM -0700, Eric Nelson wrote:
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> Hi Tom,
> 
> On 05/30/2015 09:49 AM, Tom Rini wrote:
> > On Fri, May 29, 2015 at 11:46:40AM +0200, Vincent Stehlé wrote:
> > 
> >> Hi,
> >> 
> >> Is it still possible to boot u-boot on Wandboard through USB,
> >> please?
> > 
> > Not directly.  I've been toying with a few ideas but not put any
> > into practice yet.  The first and possibly simplist would be to
> > mimic the USB RNDIS in SPL support am335x uses (see
> > am335x_evm_usbspl_defconfig) but I don't know if we have space for
> > that.  The second would be trying to "fake" things such that for
> > imx_usb_loader you can pass both SPL and u-boot.img, and SPL is
> > run, inits memory and just exists and then u-boot.img is loaded and
> > run, similar to how with the non-SPL case you can use the loader to
> > pass in u-boot.imx as well as a kernel, ramdisk, etc, into DDR.
> > 
> > Proof of concepts, patches or just plain old feedback greatly 
> > appreciated!
> > 
> 
> This is an old topic and the threading seems to be messed
> up in the archive, but I think Michael Trimarchi has a
> solution based on inclusion of DFU in the SPL image:
> 
> 	http://lists.denx.de/pipermail/u-boot/2013-October/165849.html
> 
> I would prefer to see something slimmer if possible, and using
> imx_usb has the advantage of only needing a single tool on the
> programming host.

Ah yes, firing up and letting DFU do the rest is another option I had
forgotten about.  But I too lean towards something imx_usb can do as
that will also make integration into the Freescale factory flashing tool
easier I suspect.

-- 
Tom
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