framebuffer for ST7565R chip set

Dear All,

I want to implement a linux frame buffer driver for graphical
LCD(ST7565R chip set). This is 128X64 pixel resolution,that will be
interfaced to ARM9(s3c2440) based board through a GPIO pins.

I am new to framebuffer concept,can anyone share a reference code if you have
one,or give me pointers for the same.

Ravi