USB Peripheral Controller Driver

Hi All,
I am trying to write a Mass Storage Class Driver for a ISP 1582
Controller.Is there any DDK available for this Controller Chip .

If somebody has done the same please help me out .

I think QSSL is providing only Host Controller DDK.For me I have to
write a Peripheral COntroller driver for ISP 1582 Controller chipset
then a Mass Storage Class driver.

Can anybody say me how to start with.

with regards