Maintenance for the week of March 16:
• PC/Mac: No maintenance – March 16
• ESO Store and Account System for maintenance – March 18, 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.