Forgive me for not randomly assuming you had a gamepad. But it's okay, there's douchebags like you that make the world what it is.
Gamepad on the PC is no different than playing on a console, except a better resolution, and usually worse optimization, like what Capcom did to previous PC ports of DMC games.
And I don't know how you got that information, but I can't find anything, anywhere of the 360 and PS3 versions being ports of the PC version. It strikes me as odd especially since it started development first and foremost on the PS3, then branched into 360 and PC versions later announced. With the PC version being released half a year later than the console versions is rather peculiar if it is indeed the original.