Fujifilm has released firmware updates for 6 of its X series lenses.
The update brings the addition of a 'Lens Modulation Optimizer' function for the X-E2 camera, and the addition of a 'Phase Detection AF' function also for the X-E2.
Lenses for which the updates can be downloaded are as follows:
XF 14mm f/2.8 R
XF 18-55mm f/2.8-4 R LM OIS
XF 35mm f/1.4 R
XF 55-200mm f/3.5-4.8 R LM OIS
XF 60mm f/2.4 R Macro
XC 16-50mm f/3.5-5.6 OIS ('Phase Detection AF' function update only)
For more information and to download the updates, take a look at the Fujifilm Support page