proxmox-mirrors/fwupd
1
0
Fork 0
mirror of https://git.proxmox.com/git/fwupd synced 2025-07-25 12:40:52 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity
aaa77c6f51
fwupd/plugins/dfu-csr
History
Richard Hughes aaa77c6f51 Allow adding and removing custom flags on devices 
The CustomFlags feature is a bit of a hack where we just join the flags
and store in the device metadata section as a string. This makes it
inefficient to check if just one flag exists as we have to split the
string to a temporary array each time.

Rather than adding to the hack by splitting, appending (if not exists)
then joining again, store the flags in the plugin privdata directly.

This allows us to support negating custom properties (e.g. ~hint) and
also allows quirks to append custom values without duplicating them on
each GUID match, e.g.

[USB\VID_17EF&PID_307F]
Plugin = customflag1
[USB\VID_17EF&PID_307F&HUB_0002]
Flags = customflag2

...would result in customflag1,customflag2 which is the same as you'd
get from an enumerated device flag doing the same thing.
2021-06-23 07:59:15 +01:00
..
data csr: Rename plugin to dfu-csr as it depends on the prefixed plugin 2021-02-18 14:46:20 +00:00
dfu-csr.quirk Simplify the quirk file format 2021-03-03 08:30:34 +00:00
fu-dfu-csr-device.c Allow adding and removing custom flags on devices 2021-06-23 07:59:15 +01:00
fu-dfu-csr-device.h trivial: fixup includes for a variety of plugins 2021-06-14 10:12:45 +01:00
fu-plugin-dfu-csr.c trivial: fixup includes for a variety of plugins 2021-06-14 10:12:45 +01:00
meson.build Move the plugin build logic to the plugins themselves 2021-02-18 14:46:20 +00:00
README.md Add a new internal flag to opt-in to GUID matching 2021-02-25 15:47:25 +00:00

README.md

DFU 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

Update Behavior

A DFU device usually presents in runtime mode (or with no interfaces defined), but if the user puts the device into bootloader mode using a physical button it then enumerates with a HID descriptor. On attach the device returns to runtime mode which may mean the device "goes away".

For this reason the REPLUG_MATCH_GUID internal device flag is used so that the bootloader and runtime modes are treated as the same device.

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.