Rock/U-Boot

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Features

• both Rockchip proprietary USB protocol and fastboot USB protocol are supported (Rockchip USB tools works)
• format of partitions (images) are compatible to Rockchip proprietary bootloader (rkcrc, mkbootimg works)
• (need more investigation...)

Build

git clone https://github.com/radxa/u-boot-rockchip.git
cd u-boot-rockchip
export ARCH=arm
export CROSS_COMPILE=arm-linux-gnueabihf-
make rk30xx

RK3188Loader_uboot.bin will be created. DON'T FLASH IT.

Develop

Some important files and directories related to the Rockchip platform:

 * UserManual - documentation
 * include/configs/rk30xx.h - configuration file
 * tools/rk_tools

 * board/rockchip
    ├── common
    │   ├── armlinux
    │   ├── common
    │   │   ├── A8MMU
    │   │   ├── crc
    │   │   ├── emmc
    │   │   ├── fat
    │   │   ├── rc4
    │   │   ├── rockusb
    │   │   ├── serial_p9
    │   │   └── SPI
    │   └── platform
    │       ├── rk2928
    │       └── rk30
    └── rk30xx

 * arch/arm/cpu/armv7/rk30xx
 * arch/arm/include/asm/arch-rk30xx

Unbrick

If something goes wrong and your device doesn't boot anymore, read Unbrick Rock.

External links

• http://androtab.info/rockchip/u-boot/ (working binaries)
• https://github.com/linux-rockchip/u-boot-rockchip (some improvement)