I found the following in relation to the psp version
A PlayStation Portable version of the CS Edition, along with full voice acting including Tomoya, was released on March 19, 2009 by Prototype.[
The PSP and PC re-releases will now include extra scenarios, both the sad ending and the happy ending in addition to Tomoya being fully
the PSP version of Tomoyo After. It not only retains the extended scenario found on the PS2 version, but Tomoya is now fully voiced by youknowwho
That's about it
Unfortunately no one has picked it up for translation. I don't think anyone is aware of the psp port