write_kbd
error = write_kbd(state->kbdc, KBDC_SET_LEDS,
error = write_kbd(state->kbdc, KBDC_SET_TYPEMATIC, i);
error = write_kbd(state->kbdc, KBDC_SET_TYPEMATIC, *(int *)arg);
error = write_kbd(state->kbdc, KBDC_SET_TYPEMATIC, val);
static int write_kbd(KBDC kbdc, int command, int data);