I could be wrong but I thought that only Nikon could do it because they hold the patent for it. So for sure Canon can technologically do it, but if it anything remotely close to the way Nikon does it, they wont be able to because of Nikon's patent. That was my understanding...maybe soomeone can confirm...
Canon DSLRs already have mirror lockup. Canon pocket cameras can autofocus using contrast detection. The rest is technicalities, specifically -
1. A way to turn the camera off with the mirror locked up.
2. Check if an EF-S lens is connected to the camera, and if so -
2.1. If mirror is down, keep it down, display a message on the back screen, and under no condition move it up.
2.2. If mirror is up, keep it locked up, and use contrast detection to autofocus.