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