HERE's TWO joint mobility and foot/ankle awareness exercises that get into the posterior compartment and deep posterior compartment of the lower leg nicely. One is from a cat crawl beginning position, the other from the top position of a push-up.
You can get some novel contractions of the calf muscles if you focus on the sensory awareness of the muscles (as well as the spatial awareness required for doing the figure 8's).
Try to keep you've got good spinal alignment during them for bonus points.
Enjoy! And may the Calf-growing Force be with you!