3 month old sleeping too much?

My baby is 3 and a half months old. I feel like he sleeps too much during the day. He does have play time but most of the time he's awake for about 40 minutes to an hour before he wants to sleep again. Sometimes he wakes up, eats and wants to go right back to sleep. I read that he should be awake for an hour and a half between naps but that barely ever happens. Is this normal?