Very nice song which I saw in the film Never Back Down

(Capo 3)

Intro (listen to the song for strokes and timing)
-----
Em throughout for 4 bars, accentuating the first beat of each bar


Verse and Chorus
----------------

This pattern based on the below chords pretty much repeats throughout the whole song

Em / D / G / Cmaj7

I play it as below as a main riff


      Em    D    G    Cmaj7
-----------------------------|
-----------------0----0------|
------------0----0----0------|
-2-4---2----4----0----2------|
-------2----5----2----3------|
-------0---------3-----------|


This repeats for a while before it hits an instrumental bit which is simpply an Em and 
Am but as below:

Em 6 bars / Am for 1 bar and let the Am ring for a 2nd bar, back to main riff

That's pretty much it