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fwupd/plugins/logitech-hidpp
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Richard Hughes faa35e430b Show a warning if the device has no GType and the plugin has no default 
This also renames a symbol to make it clear that you can call it more than once.

Fixes https://github.com/fwupd/fwupd/issues/3148
2021-04-15 16:52:56 +01:00
..
data Rename unifying plugin to logitech-hidpp (Fixes: #1329) 2019-11-04 13:35:36 -06:00
fu-logitech-hidpp-bootloader-nordic.c Remove FuFirmwareImage and just use FuFirmware instead 2021-03-09 21:14:12 +00:00
fu-logitech-hidpp-bootloader-nordic.h Only include the start year in the copyright header 2021-01-07 14:48:16 +00:00
fu-logitech-hidpp-bootloader-texas.c Remove FuFirmwareImage and just use FuFirmware instead 2021-03-09 21:14:12 +00:00
fu-logitech-hidpp-bootloader-texas.h Only include the start year in the copyright header 2021-01-07 14:48:16 +00:00
fu-logitech-hidpp-bootloader.c Support more than one protocol for a given device 2021-03-01 16:14:36 +00:00
fu-logitech-hidpp-bootloader.h Only include the start year in the copyright header 2021-01-07 14:48:16 +00:00
fu-logitech-hidpp-common.c Only include the start year in the copyright header 2021-01-07 14:48:16 +00:00
fu-logitech-hidpp-common.h Only include the start year in the copyright header 2021-01-07 14:48:16 +00:00
fu-logitech-hidpp-hidpp-msg.c Only include the start year in the copyright header 2021-01-07 14:48:16 +00:00
fu-logitech-hidpp-hidpp-msg.h Only include the start year in the copyright header 2021-01-07 14:48:16 +00:00
fu-logitech-hidpp-hidpp.c Only include the start year in the copyright header 2021-01-07 14:48:16 +00:00
fu-logitech-hidpp-hidpp.h Only include the start year in the copyright header 2021-01-07 14:48:16 +00:00
fu-logitech-hidpp-peripheral.c Remove FuFirmwareImage and just use FuFirmware instead 2021-03-09 21:14:12 +00:00
fu-logitech-hidpp-peripheral.h Only include the start year in the copyright header 2021-01-07 14:48:16 +00:00
fu-logitech-hidpp-runtime.c Support more than one protocol for a given device 2021-03-01 16:14:36 +00:00
fu-logitech-hidpp-runtime.h Only include the start year in the copyright header 2021-01-07 14:48:16 +00:00
fu-logitech-hidpp-self-test.c Only include the start year in the copyright header 2021-01-07 14:48:16 +00:00
fu-plugin-logitech-hidpp.c Show a warning if the device has no GType and the plugin has no default 2021-04-15 16:52:56 +01:00
logitech-hidpp.quirk Simplify the quirk file format 2021-03-03 08:30:34 +00:00
meson.build Move the plugin build logic to the plugins themselves 2021-02-18 14:46:20 +00:00
README.md trivial: Codespell fixes 2021-03-19 16:42:33 +00:00

README.md

Logitech HID Support

Introduction

This plugin can flash the firmware on Logitech Unifying dongles, both the Nordic (U0007) device and the Texas Instruments (U0008) version.

This plugin will not work with the different "Nano" dongle (U0010) as it does not use the Unifying protocol.

Some bootloader protocol information was taken from the Mousejack[1] project, specifically logitech-usb-restore.py and unifying.py. Other documentation was supplied by Logitech.

Additional constants were taken from the Solaar[2] project.

Firmware Format

The daemon will decompress the cabinet archive and extract a firmware blob in a vendor-specific format that appears to be a subset of the Intel HEX format.

This plugin supports the following protocol IDs:

  • com.logitech.unifying
  • com.logitech.unifyingsigned

GUID Generation

These devices use the standard USB DeviceInstanceId values when in DFU mode:

  • USB\VID_046D&PID_AAAA&REV_0001
  • USB\VID_046D&PID_AAAA
  • USB\VID_046D

When in runtime mode, the HID raw DeviceInstanceId values are used:

  • HIDRAW\VEN_046D&DEV_C52B
  • HIDRAW\VEN_046D

Vendor ID Security

The vendor ID is set from the vendor ID, in this instance set to USB:0x046D in bootloader and HIDRAW:0x046D in runtime mode.

Update Behavior

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

The receiver device presents in runtime mode, but on detach re-enumerates with a different USB PID in a bootloader mode. On attach the device again re-enumerates back to the runtime mode. All unifying devices attached to the receiver will not work for the duration of the update.

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.

Design Notes

When a dongle is detected in bootloader mode we detach the hidraw driver from the kernel and use raw control transfers. This ensures that we don't accidentally corrupt the uploading firmware. For application firmware we use hidraw which means the hardware keeps working while probing, and also allows us to detect paired devices.

[1] https://www.mousejack.com/ [2] https://pwr-Solaar.github.io/Solaar/

External interface access

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