How can keep my little boy from spending time alone with his father so they can still see eachother but no one gets hurt?

I have a 7 month old son and his father yells and swears at him all the time. He tells him to shut the F up even if he is just laughing.. but laughing louder than the tv. At night if my son wakes up for some reason he tells hiim that he wishes he would just suffocate himself with the blankets. If i have a shower he will leave my son on the floor crying with the TV turned up so he cant hear him and will be playin video games. He is also tryin to teach him the F word as his first word and wants him to be a satanist. I want to leave him. But i dont want to leave my son alone with him. it hurts every time he says he hopes our son dies or that we should get rid of him. I dont know wut i can do. can i have supervised visits for them only?