While posting the full text of those feats would technically be in violation of copyright law, I can present you those feats, reworded. I can assure you that my rewordings are fully equivalent with the originals.
Choke Hold [general]
Prerequisites: Improved Unarmed Strike, Improved Grapple, Stunning Fist
Benefit: If you manage to pin your opponent in a grapple, and maintain that pin for one full round, your opponent falls unconcious for 1d3 rounds. He can make a Fort saving throw (DC 10 + 1/2 your class level + your Wisdom modifier) to negate this effect.
(The feat seems to indicate that you can force your opponent to make a save at the end of each full round you maintain a pin)
Earth's Embrace [general]
Prerequisites: Improved Unarmed Strike, Improved Grapple, Strength 15+
Benefit: If you manage to pin your opponent in a grapple, you deal double normal damage each round you maintain the pin (just as if you dealt a critical hit). In order to do double damage, you must remain immobile (but not helpless), giving opponents a +4 bonus to hit you. Your pinned opponent is still held immobile as well.