Maintenance for the week of May 25:
• PC/Mac: No maintenance – May 25
• ESO Store and Account System for maintenance – May 27, 6:00AM EDT (10:00 UTC) - 4:00PM EDT (20:00 UTC)
For giggles I just tried it with both PS4 and PS3 controllers, and it "worked". I plugged in using USB and enabled gamepad mode (settings -> gameplay). Give it a try and see how it goes.