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how to use a independent touch screen driver



Hi all:

    I am using 8168 dvr platform to design touch screen function.

    The dvriver of touch screen is ft5206, I added it in kernel and when i touch the screen, I can get the isr and print information output from  kernel: as follows show:

isr ts-read
posx[0]=544 posy[0]526
isr ts_poscheck
isr ts-read
posx[0]=544 posy[0]525
isr ts_poscheck
isr ts_poscheck

But when I try to use it to NVRSource4.1, I don't know how to do. The example I run in monitor I can use mouse manipulate the GUI. 

I refered the article http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/717/t/329945.aspx

and run cmd :

ln -s /dev/input/event0 /dev/input/touchscreen0
ts_calibrate 

the second command cause a err: message  as follows show:

root@HD_EX1002F:~# ts_calibrate
ts_open: Not a directory
root@HD_EX1002F:~#

Now I need use the touch screen driver of  FT5206  , How should I do, and why when i run the ts_calibrate will cause a err message?

TKS for taking a look.