The functor from $sl_2-mod$ to $U_q(sl_2)-mod$.

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Let $sl_2-mod$ be the category of all finite dimensional $sl_2$-modules and let $U_q(sl_2)-mod$ be the category of all finite dimensional $U_q(sl_2)$-modules, $q$ is not a root of unity. It is said that $sl_2-mod$ is equivalent to $U_q(sl_2)-mod$. What is the functor from $sl_2-mod$ to $U_q(sl_2)-mod$ and what is the functor from $U_q(sl_2)-mod$ to $sl_2-mod$? Thank you very much.