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
$ 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.