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fwupd/plugins/logitech-hidpp
History
Richard Hughes 0076c3eaf9 logitech-hidpp: Remove the FuLogitechHidPpBootloaderClass->setup() action 
It's not required as we can just call up to the parent instead.
2021-06-17 16:21:41 +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 logitech-hidpp: Remove the FuLogitechHidPpBootloaderClass->setup() action 2021-06-17 16:21:41 +01:00
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 logitech-hidpp: Remove the FuLogitechHidPpBootloaderClass->setup() action 2021-06-17 16:21:41 +01:00
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 logitech-hidpp: Remove the FuLogitechHidPpBootloaderClass->setup() action 2021-06-17 16:21:41 +01:00
fu-logitech-hidpp-bootloader.h logitech-hidpp: Remove the FuLogitechHidPpBootloaderClass->setup() action 2021-06-17 16:21:41 +01:00
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-device.c logitech-hidpp: fix bug in type casting 2021-06-14 12:35:34 +01:00
fu-logitech-hidpp-device.h trivial: fixup includes for a variety of plugins 2021-06-14 10:12:45 +01:00
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 trivial: fixup includes for a variety of plugins 2021-06-14 10:12:45 +01:00
fu-logitech-hidpp-hidpp.h trivial: fixup includes for a variety of plugins 2021-06-14 10:12:45 +01:00
fu-logitech-hidpp-peripheral.c logitech-hidpp: make peripheral class derivable and subclass it 2021-06-11 13:53:02 +02:00
fu-logitech-hidpp-peripheral.h logitech-hidpp: make peripheral class derivable and subclass it 2021-06-11 13:53:02 +02:00
fu-logitech-hidpp-runtime-unifying.c logitech-hidpp: make receiver runtime class derivable 2021-06-14 13:31:44 +01:00
fu-logitech-hidpp-runtime-unifying.h logitech-hidpp: make receiver runtime class derivable 2021-06-14 13:31:44 +01:00
fu-logitech-hidpp-runtime.c logitech-hidpp: make receiver runtime class derivable 2021-06-14 13:31:44 +01:00
fu-logitech-hidpp-runtime.h trivial: logitech: fixup some includes 2021-06-16 08:36:18 +01:00
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 logitech-hidpp: make receiver runtime class derivable 2021-06-14 13:31:44 +01:00
logitech-hidpp.quirk logitech-hidpp: make receiver runtime class derivable 2021-06-14 13:31:44 +01:00
meson.build logitech-hidpp: make receiver runtime class derivable 2021-06-14 13:31:44 +01:00
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.