The song is written in Drop D tuning
(Lowest/Thickest to Highest/Thinest)
D - A - D - G - B - E 

Intro/Chorus

e|---------------------|
B|---------------------|
G|-----14-14-----11-11-|
D|-----x--x------x--x--|
A|-5 5-12-12-5 5-9--9--|
D|-0 0-------0 0-------|

(Rhythm hint: he hits the open notes twice then he hits the
other note once for about a little over a normal note and 
hits an upstroke on the way back to the open if you can understand)

Verse

e|-0-------0---------|
B|-0-------0---------|
G|-0-------0---------|
D|-4-------4---------|
A|-5-------5---------|
D|-0-------5---^^^---|

Pre-Chorus

e|-0------0------|
B|-0------0------|
G|-0------0------|
D|-0------0------|
A|-2------5------|
D|-2------5------|

now the chorus is the exact same as the intro except he adds:

e|----------|
B|----------|
G|----------|
D|-5------7-|
A|-5------7-|
D|-5------7-|

at the end. the second time he moves down to 7 and 9