Rockusb (Rockchip USB protocol) ===================================================== Overview -------- Rockusb protocol is widely used by Rockchip SoC based devices. It can read/write info, image to/from devices. This document briefly describes how to use Rockusb for upgrading firmware (e.g. kernel, u-boot, rootfs, etc.). Tools -------- There are many tools can support Rockusb protocol. rkdeveloptool (https://github.com/rockchip-linux/rkdeveloptool) is open source, It is maintained by Rockchip. People don't want to build from source can download from here (https://github.com/rockchip-linux/rkbin/blob/master/tools/rkdeveloptool) Usage -------- The Usage of Rockusb command is: rockusb e.g. rockusb 0 mmc 0 On your U-Boot console, type this command to enter rockusb mode. On your host PC. use lsusb command. you should see a usb device using 0x2207 as its USB verdor id. for more detail about the rkdeveloptool. please read the usage. rkdeveloptool -h use rkdeveloptool wl command to write lba. BeginSec is the lba on device you want to write. sudo rkdeveloptool wl to flash U-Boot image use below command. U-Boot binary is made by mkimage. see doc/README.rockchip for more detail about how to get U-Boot binary. sudo rkdeveloptool wl 64 Current set of rkdeveloptool commands supported: - rci: Read Chip Info - rfi: Read Flash Id - rd : Reset Device - td : Test Device Ready - rl : Read blocks using LBA - wl : Write blocks using LBA - wlx: Write partition To do ----- * Fully support Rockusb protocol