I, too, have always loved this song. Figured it out years ago but had forgotten it. SO, I revisited things. I don't have a guitar with me, so it might be in E but this is what I hear: The pedal note is D with a partial chord alternating between D7sus and D7 ("baby's calling me home...")then it goes to G7 with a little lick ("did you see her crying") to Bm7 ("my baby knows I'm dying"), ("so she keeps on") Em7, A7 ("calling me...") back to the pedal D ("...home"). See if that gets you in the ballpark