X button: Sprint (Just tap it, holding down is not required)
Left/Right on D-Pad: Switch Grenades
Right Stick: Aim and click to zoom in/out
Left stick: Move and click and hold to crouch
What do you think?
P.S. I also think the X button could be to switch grenades and up on the D-Pad could be sprint
EDIT: http://i.imgur.com/idodx.png The button layout kind of looks like it says Recon, it’s a low quality screenshot, sorry, but the layout is basically what I listed that isn’t in the P.S. section.