I think its just these 4 chords throughout the song, each played for 4 counts.

              A (x02220@1)                E (022100@1)                     F#m (244222@1)                 De|-------------------------2----------2------------| (xx0232@1)B|----2--------------------2----------3------------|
G|----2--------1-----------2----------2------------|
D|----2--------2-----------4-----------------------|
A|-------------2-----------4----------X------------|
E|-----X-------------------2----------X------------|


A - E - F#m - D