The injury-plagued Birmingham City midfielder was forced to miss his country's Euro 2012 campaign due to a recurring groin problem.
"To be honest, I have missed nearly a year now since I last played with injuries and I am desperate to play, I am desperate to play for Ireland," said the 29-year-old.
"I am not one who comes and expects to sit on the bench every game, I want to play.
"If I have to do better in training or whatever, I am willing to do it. I want to play, I want to get more caps under my belt, I want to do well. I want to wear the green shirt."