Plugin: Synaptics CxAudio — Conexant Audio


This plugin is used to update a small subset of Conexant (now owned by Synaptics) audio devices.

Firmware Format

The daemon will decompress the cabinet archive and extract a firmware blob in a modified SREC file format.

This plugin supports the following protocol ID:

  • com.synaptics.synaptics-cxaudio

GUID Generation

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

  • USB\VID_17EF&PID_3083

These devices also use custom GUID values, e.g.

  • SYNAPTICS_CXAUDIO\CX2198X (only-quirk)

Update Behavior

The firmware is deployed when the device is in normal runtime mode, and the device will reset when the new firmware has been written.

Vendor ID Security

The vendor ID is set from the USB vendor, in this instance set to USB:0x17EF

Quirk Use

This plugin uses the following plugin-specific quirks:


Base integer for ChipID.

Since: 1.3.2


If the chip supports self-reset.

Since: 1.3.2


Address of patch location #1.

Since: 1.3.2


Address of patch location #2.

Since: 1.3.2

External Interface Access

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

Version Considerations

This plugin has been available since fwupd version 1.3.2.