Some Sony computers have an I/O controller that handles various interface devices, e.g., the jog dial. The
spic driver provides support for some of these.
The actual protocol used by the SPIC seems to vary a lot between different models; this driver has only been tested on the Vaio SRX77.
The
spic driver handles the jog dial and its associated buttons. They are turned into a
wsmouse which can the be accessed in the normal way. The jog dial works as a scroll button, and clicking it generates a click with the "middle" button.