Not entirely sure what range to put him on, but I'll give it a shot.. Certainly 22 and 77 are in there. Clubbed broadways are all possible (going to assume T not club). A9-AQ, A7s. I'd say there's a chance he does this with a mid pair, so I'll throw in 99 and TT. Against this range, it's a call:

equity (%) win (%) tie (%)
Hand 1: 54.0657 % 47.04% 07.02% { TT-99, 77, 22, AQs-A9s, A7s, KcQc, KcJc, KcTc, QcJc, QcTc, JcTc, AQo-A9o }
Hand 2: 45.9343 % 38.91% 07.02% { AsTh }

It's about the same if you have the Tc:

equity (%) win (%) tie (%)
Hand 1: 52.0140 % 44.78% 07.23% { TT-99, 77, 22, AQs-A9s, A7s, KcQc, KcJc, KcTc, QcJc, QcTc, JcTc, AQo-A9o }
Hand 2: 47.9860 % 40.75% 07.23% { AsTc }

Also, I completely ignored the possibility of a pure bluff, so you may be favorite against the range.