Pattern Maker is an Illustrator feature. The closest PS comes to something like that is the Deco Fill.
What kind of backgrounds are you talking about?
One popular approach is creating a new document from a rectangular or square element and applying the Filter Offset (with something like half the width and height as horizontal and vertical offsets).
This usually makes the borders noticeable (if they are noticeable at all) and one can then touch them up.
For example - take sample from sand on the beach and when generate the final result will be constantly sand. With the fill feature if the sample box is irregular in the end result you can see where the sample is stitched. In most cases I generate raster images. Pattern maker was good and simple to do that.
There was pattern maker plugin until cs6. If I recall right until cs4 it came with it, for CS5 & 6 is should be installed.