Radxa - U-Boot

U-Boot

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...)

For NAND flash

Build

Refer install toolchain if you don't have arm-eabi- on your system. Other toolchain(Linaro arm-linux-gnueabihf-gcc 4.9) may cause data abort errors.

git clone -b u-boot-rk3188 https://github.com/radxa/u-boot-rockchip.git
cd u-boot-rockchip
make rk30xx

The binary we need for nand flash are RK3188Loader_miniall.bin and uboot.img.

Flash

refer flash image page
use the new u-boot to erase the old loader

   sudo upgrade_tool ef RK3188Loader_miniall.bin

flash new loader

   sudo upgrade_tool ul RK3188Loader_miniall.bin

format NAND (first time only)

   sudo upgrade_tool lf

flash parameter

   upgrade_tool di -p parameter

paramter file

   FIRMWARE_VER:4.2.2
   MACHINE_MODEL:radxa_rock
   MACHINE_ID:007
   MANUFACTURER:RADXA
   MAGIC: 0x5041524B
   ATAG: 0x60000800
   MACHINE: 3066
   CHECK_MASK: 0x80
   KERNEL_IMG: 0x60408000
   CMDLINE:console=ttyFIQ0,115200 console=tty0 root=/dev/block/mtd/by-name/linuxroot rw rootfstype=ext4 init=/sbin/init mac_addr=de:ad:de:ad:be:ef initrd=0x62000000,0x00800000  mtdparts=rk29xxnand:0x00002000@0x00002000(uboot),0x00008000@0x00004000(boot),-@0x000c0000(linuxroot)

flash U-Boot

   sudo upgrade_tool wl 0x2000 uboot.img
   sudo upgrade_tool rd

flash kernel + ramdisk

   upgrade_tool di -b boot-linux.img

flash root fs

   upgrade_tool di linuxroot rootfs.img

Booting log can be found at: http://paste.ubuntu.com/9623598/

For SD card

Build

Refer install toolchain if you don't have arm-eabi- on your system. Other toolchain(Linaro arm-linux-gnueabihf-gcc 4.9) may cause data abort errors.

git clone -b u-boot-rk3188-sdcard https://github.com/radxa/u-boot-rockchip.git
cd u-boot-rockchip
make rk30xx
./pack-sd.sh

The binary we need for sdcard is u-boot-sd.img.

Flash

sudo dd if=u-boot-sd.img of=/dev/sdx seek=64

Insert the uSD card to rock pro, it will boot from u-boot on uSD card.

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)