In Filters there is Sharpen. Under this there are several options. One is the Unsharp mask as it offers several varialbles to adjust the sharpness. Contrary label but it works.
The help files offer some recommendations and describe Photoshop sharpening tools, including Unsharp Mask and Smart Sharpen. There's also a demonstration video.
Photoshop Help / Adjusting image sharpness and blur | CC, CS6: