Introduction

Wistron use a generic flashing protocol for dock devices supplied to various OEMs. The protocol is compatible with designs that use Nuvoton, Infineon, and GD MCUs.

Firmware Format

The daemon will decompress the cabinet archive and extract a firmware blob in a zipped file format. The archive must contain exactly one file with each of these extensions:

• .wdfl.sig
• .wdfl
• .bin

This plugin supports the following protocol ID:

• com.wistron.dock

GUID Generation

These devices use the standard USB DeviceInstanceId values, e.g.

• USB\VID_0FB8&PID_0010

Devices also have additional instance IDs which corresponds MCU type, e.g.

• USB\VID_0FB8&PID_0010&MCUID_M4521

Update Behavior

The device enters DFU mode, then writes the fixed-size WDFL signature and WDFL data, then writes blocks of variable sized data. Finally it clears DFU mode and the user can re-plug the USB-C cable to trigger the update.

Vendor ID Security

The vendor ID is set from the USB vendor, in this example set to USB:0x0FB8

External Interface Access

This plugin requires read/write access to /dev/bus/usb.

Version Considerations

This plugin has been available since fwupd version 1.8.9.

Owners

Anyone can submit a pull request to modify this plugin, but the following people should be consulted before making major or functional changes:

• Felix Chen: a999153