Hi, I read this like eons ago, so I don´t remember all of it, but I think it´s the kind of fic you are searching for:
Sound of silence:
(Very hurt Loki, totally protective Tony, Loki only want´s Tony)
When Loki is dropped, broken and mute, into Tony Stark's proverbial lap he seizes the opportunity to act as Yinsen and heal the god's mental and physical wounds.
http://archiveofourown.org/works/514030/chapters/906861