For looking up/down, i use the right analog stick.
I use the left analog stick for moving.
I use X and Y for sidestepping.
I use L for aim.
I use R for shooting.
I use A for action (opening doors and whatnot).
I use Y for reloading.
I use the right-thumb stick button for crouching.
I think that's all the controls, but i'm not sure.