While it's not something you're really after, after a lot of frustration and head-scratching I was able to build a working SPI flash image for my fork of U-Boot:
![[Image: nz86P8H.png]](https://i.imgur.com/nz86P8H.png)
I ended up using Rockchip's firmwareMerger with the following config to build the image:
For some reason, firmwareMerger from Rockchip repository doesn't work properly, so I had to use the version from Radxa's repository to get proper image.
It should also be possible to use U-Boot TPL and SPL instead of Rockchip blobs, but haven't found any concrete answer on how to build the image using these. Documentation just isn't clear enough, and recovery process is too cumbersome and annoying.
dd is good enough for flashing the image to the SPI. Just make sure to use flash_erase beforehand.
In case something goes wrong and PBP gets stuck somewhere in early boot, the easiest recovery method I found is taking off the metal shield and shorting SPI clock to ground until ARM Trusted Firmware (BL31) initialization. After Linux boots, you can just use dd or flash_erase to reflash/erase the chip.
Overall, it works fine on my device, so there's no more eMMC in my Pinebook Pro
You can find the image here. The build scripts for everything are here.
I ended up using Rockchip's firmwareMerger with the following config to build the image:
Code:
[System]
FwVersion=19.12.03
BLANK_GAP=1
FILL_BYTE=0
[UserPart1]
Name=IDBlock
Flag=0
Type=2
File=rkbin/bin/rk33/rk3399_ddr_933MHz_v1.24.bin,rkbin/bin/rk33/rk3399_miniloader_spinor_v1.14.bin
PartOffset=0x40
PartSize=0x7C0
[UserPart2]
Name=uboot
Type=0x20
Flag=0
File=u-boot.img
PartOffset=0x4000
PartSize=0x2000
[UserPart3]
Name=trust
Type=0x10
Flag=0
File=out/sd/trust.img
PartOffset=0x6000
PartSize=0x2000For some reason, firmwareMerger from Rockchip repository doesn't work properly, so I had to use the version from Radxa's repository to get proper image.
It should also be possible to use U-Boot TPL and SPL instead of Rockchip blobs, but haven't found any concrete answer on how to build the image using these. Documentation just isn't clear enough, and recovery process is too cumbersome and annoying.
dd is good enough for flashing the image to the SPI. Just make sure to use flash_erase beforehand.
In case something goes wrong and PBP gets stuck somewhere in early boot, the easiest recovery method I found is taking off the metal shield and shorting SPI clock to ground until ARM Trusted Firmware (BL31) initialization. After Linux boots, you can just use dd or flash_erase to reflash/erase the chip.
Overall, it works fine on my device, so there's no more eMMC in my Pinebook Pro
You can find the image here. The build scripts for everything are here.