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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.
Regards,
Eric