Adobe doesn't make a practice of adding new camera support to older versions of Photoshop that are no longer currently selling.
If your camera is newer than your version of Photoshop, you'll want to do one of two things:
1. Use the latest version of Adobe's free DNG converter to convert your raw files to the .DNG format, which can then be read by your older version of Photoshop.
-or-
2. Upgrade Photoshop to the latest version, which (assuming support for your camera has already been added) will be able to open the raw files directly.
-Noel