[U-Boot] rk3288: firefly: flashing emmc from maskrom using USB

[Kever Yang]

HI Jack,


On 01/15/2019 01:28 AM, Jack Mitchell wrote:
> I'm having issues flashing the emmc on my firefly board using USB. For
> some reason it seems as though trying to write to the emmc flash sector
> 0x40 for uboot spl+proper from the Maskrom/Loader doesn't work. Can
> anyone elaborate on what I'm doing wrong, or another way I could achieve
> this?
>
> The current state of the emmc is empty, so it boots into the maskrom on
> reset.
>
> I've tried with the Rockchip Loader binary as shown below:
>
> $ tools/mkimage -n rk3288 -T rksd -d \
> 	spl/u-boot-spl-dtb.bin out && \
> 	cat u-boot-dtb.bin >> out
>
> $ rkdeveloptool db RK3288Loader_uboot_V2.17.02.bin

Where did you get this loader? I think you may need to update it for
write emmc correctly with 'wl' command, eg. you can merge the loader
from latest rockchip rkbin with below command:
tools/boot_merger --replace tools/rk_tools/ .  RKBOOT/RK3288MINIALL.ini

Thanks,
- Kever
>
> $ rkdeveloptool wl 64 out
>
> $ rkdeveloptool rd
>
> This just loads back into the maskrom as if nothing was written to the emmc.
>
> I've used the same method but writing to an sd card:
>
> $ tools/mkimage -n rk3288 -T rksd -d \
> 	spl/u-boot-spl-dtb.bin out && \
> 	cat u-boot-dtb.bin >> out
>
> $ dd if=out of=/dev/sdc seek=64
>
> This works fine and boots into full uboot as I would expect, but from
> the sd card rather than the emmc.
>
> I have then flashed the emmc from the sd card running uboot, which then
> enables me to boot uboot from the emmc.
>
> I can also use rockusb from the sd card uboot to flash uboot to the emmc
> using the following commands:
>
> uboot> rockusb 0 mmc 0
>
> $ rkdeveloptool wl 64 out
>
> $ rkdeveloptool rd
>
> This also works. However both working methods require me starting uboot
> from an sd card in the first instance. How can I successfully flash the
> emmc using just USB? Any input would be appreciated.
>
> Regards,
> Jack.
>