Initializing devices via Bluetooth adapter before system boots?

Question

Bluetooth

Greetings.
I bought a Logitech K380 keyboard and Buro usb Bluetooth adapter (BT40A)
Bluetooth 4.0 + edr standard, chipset: csr8510
The problem is that the adapter is not initialized before the OS is loaded, so I can’t use the keyboard or other bluetooth device in the BIOS and etc.
How can I make hardware think that the adapter is a regular keyboard?
Those. so that initialization takes place when the computer starts.
Thank you.

Answer 1

In order for the bluetooth keyboard to work immediately after the power start, you need to:
1) Enable support for USB devices in the BIOS. Option USB Legacy Support, USB Device Function, etc.
2) The Bluetooth adapter must be able to pretend to be a HID device on the host side (HID proxy mode), if the host for some reason cannot raise BT, that is, it must be a very independent exchange device.