[U-Boot] [PATCH 0/2] Enable DFU for RAM on Allwinner devices

[Siarhei Siamashka]

On Mon, 26 Oct 2015 12:18:35 +0100
Piotr Król <piotr.krol at 3mdeb.com> wrote:

> On Sun, Oct 25, 2015 at 06:44:45AM +0200, Siarhei Siamashka wrote:
> > Hello,
> > 
> > DFU allows to transfer large files (such as initrd images) much
> > faster than FEL.
> > 
> > Siarhei Siamashka (2):
> >   sunxi: Enable DFU for RAM
> >   musb: sunxi: Implement dfu_usb_get_reset()
> > 
> >  drivers/usb/musb-new/sunxi.c   | 12 ++++++++++++
> >  include/configs/sunxi-common.h | 30 +++++++++++++++++++++++++-----
> >  2 files changed, 37 insertions(+), 5 deletions(-)
> 
> Siarhei,
> can you give some pointers how to test those patches. I have
> A20-OLinuXino-Micro and Cubietruck and would be glad to give them a try.

Hello,

I tried to provide some basic usage instructions as a part of
the commit message:
    https://patchwork.ozlabs.org/patch/535535/

But you also need the "sunxi: cubietruck: Enable the USB OTG
controller" patch from Maxime Ripard to enable USB OTG on the
Cubietruck:
    https://patchwork.ozlabs.org/patch/530656/

> I think it would be interested to combine this method with Boris NAND support
> and get much better solution then {Live,Phoenix}Suit.

At this stage I'm only interested in the DFU usage as a speed
booster for FEL. Booting over USB via FEL allows us to temporarily
run more or less complete system (kernel and rootfs on ramdisk)
on any Allwinner device without modifying existing pre-installed
software on non-volatile storage. This already works fine, but
we were not quite happy about the data transfer speed.

If you are interested in flashing NAND, then you can probably
have a look at the recent fastboot patches from Maxime.

DFU means "Device Firmware Upgrade" and it can be also used for
flashing NAND or writing images to SD cards over USB (if we
hook up this part of the DFU functionality). The main question
is how many alternative NAND flashing methods do we need?

-- 
Best regards,
Siarhei Siamashka