What is the diagnosis and/or treatment for scarring on the lungs due to repeated pneumonia?

My boyfriend had x-rays taken that have shown he has developed some scarring on his lung due to chronic infections of pneumonia. He has seen many doctors but they haven't been able to give him any kind of diagnosis or treatment. It's gotten worse, he coughs all the time, has difficulty breathing, and is constantly spitting up phlegm and mucus from his lungs. Is there anything he can do to treat this problem? And what exactly is this condition called?