Tuning is open D major with a capo on the second fret:

D |-2/4\2-0--------------------------------0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-|
A |-0-0-0-0--------------------------------2-2-3-3-4-4-5-5-5-5-5-5-5-5-5-0-|
F#|-3/5\3-0----0-0-0-0---------------------0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-|
D |-2/4\2-0--0-0-0-0-0-2-2-2-2-2-2-2-2-2-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-|
A |-0-0-0-0--0-2-2-2-0-2-2-2-2-2-2-2-2-2-0-2-2-3-3-4-4-5-5-5-5-5-5-5-5-5-0-|
D |--------------------2-2-2-2-2-2-2-2-2-0-------------0-0-0-0-0-0-0-0-0-0-|

its pretty much that riff repeated throughout the whole song

there are some slides later on played by annother guitar which go something like this:

D |--------------------|
A |-16\11------9/4-----|
F#|--------------------|
D |--------------------|
A |--------------------|
D |--------------------\

enjoy