Nochmal zu meinem verlinkten Artikel:
Emulating a PS2 device
The ps/2 protocol is not symmetric. Acting as a device is different from acting as a host. The attached library, ps2dev, implements the device side of the protocol. It can be used to act as a mouse or a keyboard.
Letzter Satz passt doch zu Deiner Anforderung?
Hab aber auch nicht weiter geachaut 