[U-Boot] Booting Wandboard through USB

[Eric Nelson <eric.nelson@boundarydevices.com>]

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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 Stehl? 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.

Regards,


Eric
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