[U-Boot] [PATCH sunxi-tools v2 0/2] Support unified u-boot SPL for SD cards and FEL mode

[Hans de Goede]

Hi,

On 09-02-15 03:37, Siarhei Siamashka wrote:
> An updated variant of the older patch
>      http://lists.denx.de/pipermail/u-boot/2015-February/204024.html
>
> These patches are not for the u-boot code (unless u-boot decides to
> cannibalize the 'fel' tool later) but still provide a glue layerHi,
> between the Allwinner BROM code and the u-boot SPL code. And need
> to play nice with both of them.
>
> The updated 'fel' tool is supposed to be used together with u-boot
> v2015.04 and provide support for booting regular u-boot SPL binaries
> over USB via FEL mode. So that a special u-boot sunxi FEL configuration
> can be eventually dropped in the future.
>
> The usage instructions are in the 'New method of booting u-boot over USB
> (u-boot v2015.04 and later versions)' section of the linux-sunxi wiki page
>      http://linux-sunxi.org/index.php?title=FEL/USBBoot&oldid=12979
>
> It temporarily moves the BROM data from the first 32 KiB of SRAM into
> a different SRAM section before calling the SPL code. And then moves
> it back before returning from the SPL back to the FEL code in BROM.
> This provides a contiguous 32 KiB block in the beginning of SRAM for
> use by the SPL. And in the case if an extra SRAM section is not
> available, we can at least "defragmemnt" the free memory areas
> and still provide a contiguous ~21 KiB block to the SPL in the
> beginning of SRAM.
>
> This code is also available in the following branch:
>      https://github.com/ssvb/sunxi-tools/commits/20150206-fel-large-spl-support
>
> Siarhei Siamashka (2):
>    fel: Split 'aw_fel_get_version' into 'get' and 'print' variants
>    fel: New command for loading U-Boot SPL binaries in eGON format
>
>   fel-to-spl-thunk.S | 172 +++++++++++++++++++++++++++++++
>   fel-to-spl-thunk.h |  69 +++++++++++++
>   fel.c              | 291 +++++++++++++++++++++++++++++++++++++++++++++++++----
>   3 files changed, 510 insertions(+), 22 deletions(-)
>   create mode 100644 fel-to-spl-thunk.S
>   create mode 100644 fel-to-spl-thunk.h

Thanks for your work on this, ACK to both patches, feel free to push them.

One question, the new wiki instructions say that for the latest upstream u-boot
_felconfig is no longer necessary, but Simon's patches to fix FEL support upstream
contain some #ifdef FEL in start.S to skip some lowlevel init when in FEL mode,
does that mean that skipping this is no longer necessary ?

Regards,

Hans