Hi this isn't 100% but it will get you 
playing the song sounding almost like the 
original, tuning is open D which is D,A,D,F#,A,D. 
Hope this helps. I'm not sure of the chord names. 
The rhythmn is simple just listen to the song, 
basically strum whole chord then just top 3 strings.

Chords used are  Gadd2?    F#addAaddD?   D6sus4      Dsus2     D6
                 0            0            0           0       0
                 0            0            0           0       0
                 5            3            1           3       5
                 0            x            0           2       4
                 5            4            2           0       0
                 5            4            0           0       0

SONG GOES : Gadd2, F#addAaddD, Gadd2, F#addAaddD, D6sus4, Dsus2, D6 , repeat

More info: Gadd2 (add 4th fret on top A while strumming), 
F#addAaddD(also do same 4th fret note), *Repeat* then 
strum D6sus4 for a bit and break up the chord if you 
wish then Dsus2,D6,Dsus2 , then repeat from the beginning.