4.25. Rockchip RK3188¶
4.25.1. Radxa Rock¶
Radxa Rock is a small SBC based on Rockchip RK3188 SoC. See http://radxa.com/Rock for additional information.
4.25.1.1. Building¶
make ARCH=arm radxa_rock_defconfig
make ARCH=arm
4.25.1.2. Creating bootable SD card¶
This will require a DRAM setup blob and additional utilities, see above.
Card layout (block == 0x200 bytes).
Block Number |
Name |
|---|---|
0x0000 |
DOS partition table |
0x0040 |
RK bootinfo (BootROM check sector) |
0x0044 |
DRAM setup routine |
0x005C |
Bootloader (barebox) |
0x0400 |
Barebox environment |
0x0800 |
Free space start |
Instructions.
Make 2 partitions on SD for boot and root filesystems.
Checkout and compile https://github.com/apxii/rkboottools
Get some RK3188 bootloader from https://github.com/neo-technologies/rockchip-bootloader
Run “rk-splitboot RK3188Loader(L)_V2.13.bin” command. (for example). You will get FlashData file with others. It’s a DRAM setup blob.
Otherwise it can be borrowed from RK U-boot sources from https://github.com/linux-rockchip/u-boot-rockchip/blob/u-boot-rk3188/tools/rk_tools/3188_LPDDR2_300MHz_DDR3_300MHz_20130830.bin
Run “rk-makebootable FlashData barebox-radxa-rock.bin rrboot.bin”
Insert SD card and run “dd if=rrboot.bin of=</dev/sdcard> bs=$((0x200)) seek=$((0x40))”
SD card is ready
4.26. Rockchip RK3568¶
4.26.1. RK3568 EVB¶
4.26.1.1. Building¶
The build process needs three binary files which have to be copied from the rkbin https://github.com/rockchip-linux/rkbin repository to the barebox source tree:
With these barebox can be compiled as:
make ARCH=arm rockchip_v8_defconfig
make ARCH=arm
NOTE I found the bl32 firmware non working for me as of 7d631e0d5b2d373b54d4533580d08fb9bd2eaad4 in the rkbin repository.
4.26.1.2. Creating a bootable SD card¶
A bootable SD card can be created with:
dd if=images/barebox-rk3568-evb.img of=/dev/sdx bs=1024 seek=32
The barebox image is written to the raw device, so make sure the partitioning doesn’t conflict with the are barebox is written to. Starting the first partition at offset 8MiB is a safe bet.
4.26.1.3. USB bootstrapping¶
The RK3568 can be bootstrapped via USB for which the rk-usb-loader tool in the barebox repository can be used. The tool takes the same images as written on SD cards:
./scripts/rk-usb-loader images/barebox-rk3568-evb.img
Note that the boot order of the RK3568 is not configurable. The SoC will only enter USB MaskROM mode when no other bootsource contains a valid bootloader. This means to use USB you have to make all other bootsources invalid by removing SD cards and shortcircuiting eMMCs. The RK3568 EVB has a pushbutton to disable the eMMC.
