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fwupd/plugins/csr
History
Mario Limonciello 8aa5d41eb7 Add external interface messages
2020-10-26 12:05:20 -05:00
..
data csr: Add a new plugin to add support for CSR "Driverless DFU" 2017-12-11 10:47:18 +00:00
csr-aiaiai.quirk Change the quirk file structure to be more efficient 2018-06-28 13:32:30 +01:00
fu-csr-device.c Add fu_device_dump_firmware() 2020-09-24 10:54:27 -05:00
fu-csr-device.h Add FuHidDevice abstraction 2020-03-19 17:02:07 +00:00
fu-plugin-csr.c Set the protocol per-device not per-plugin 2019-11-25 18:01:54 +00:00
meson.build Convert libfwupdprivate to a shared library libfwupdplugin 2019-11-27 11:32:43 +00:00
README.md Add external interface messages 2020-10-26 12:05:20 -05:00

README.md

CSR Support

Introduction

CSR is often called “driverless DFU” and is used only by BlueCore chips from Cambridge Silicon Radio (now owned by Qualcomm). The driverless just means that it's DFU like, and is routed over HID.

CSR is a ODM that makes most of the Bluetooth audio chips in vendor hardware. The hardware vendor can enable or disable features on the CSR microcontroller depending on licensing options (for instance echo cancellation), and there’s even a little virtual machine to do simple vendor-specific things.

All the CSR chips are updatable in-field, and most vendors issue updates to fix sound quality issues or to add support for new protocols or devices.

Firmware Format

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

This plugin supports the following protocol ID:

  • com.qualcomm.dfu

GUID Generation

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

  • USB\VID_0A12&PID_1337&REV_2520
  • USB\VID_0A12&PID_1337
  • USB\VID_0A12

Vendor ID Security

The vendor ID is set from the USB vendor, in this instance set to USB:0x0A12

External interface access

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