ums —
USB mouse and touchpanel support
ums* at uhidev? reportid ?
wsmouse* at ums?
The ums driver provides support for USB mice and
  touchpanels. Access to the movement data is through the
  wsmouse(4) driver.
Be aware that many USB mice will, if the mouse device is not open,
    detach and reattach themselves repeatedly at regular intervals (usually
    around one minute) causing spam on the console and the system log. This is
    apparently intentional behavior on the part of the hardware manufacturers.
    The best workaround is to keep the mouse device open, either via X11, or, if
    not using the window system, by running
    wsmoused(8).
The ums driver appeared in NetBSD
  1.4. Touchpanel support was added in NetBSD
  5.1.