-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256
Hi Tom,
On 05/30/2015 12:25 PM, Tom Rini wrote:
On Sat, May 30, 2015 at 10:41:16AM -0700, Eric Nelson wrote:
On 05/30/2015 09:49 AM, Tom Rini wrote:
On Fri, May 29, 2015 at 11:46:40AM +0200, Vincent Stehlé wrote:
[...]
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.
I think there's an easy way and a more complicated way to do this.
The easiest is probably to do something custom in SPL and update imx_usb to support the same.
There's a WRITE_FILE command in the serial download protocol which could serve as an example, though 100% compatibility isn't needed, since the internal ROM isn't needed.
Note that this would also require updates to the SB_LOADER tool used in the Freescale Manufacturing tool for use on Windows. I think that's closed source (and C# or somesuch), but perhaps Fabio can provide details.
The harder way (and the Freescale way) is to somehow package the SPL content and full U-Boot image in a way such that the SPL is a "plugin" that can execute and return to the boot loader after setting up DDR and bundle SPL and u-boot.img into a single .imx file.
I think that both imx_usb and sb_loader support plugins.
Regards,
Eric