ABS_DISTANCE
uwacom_event(usbwcmp, EVT_ABS, ABS_DISTANCE, distance);
uwacom_event(usbwcmp, EVT_ABS, ABS_DISTANCE, distance);
BM_SET_BIT(sc->sc_bm[3], ABS_DISTANCE);
uwacom_init_abs(usbwcmp, ABS_DISTANCE, 0,