Gadget Serial Driver for AM335x

Dear Team,

               We are working on AM335x EVM and using Linux sdk version 05.05.00.00.We are connecting the Device like modem in USB1 & connecting to the PC via USB0. We are trying to enumerate the EVM as a modem by changing the descriptor fields same as that  of modem(except end point address) in gadget serial driver.We can create a 7 virtual com ports on the HOST PC by using n_ports module parameter because the modem has 14 interfaces.In the Windows PC Driver for modem is loaded but facing some problems during hand shaking.The Modem works based on the AT Commands.

1.In the gadget serial driver the end points created for the interfaces are based on an unclaimed one looks usable.
Shall we change that to specified end points given by user?

we are pass through the data between two USB ports by using file descriptors of dev files  ans pass through  application.

2.By default the value of DCD is high in the serial driver,but LOW in the modem,After the connect AT command the modem send DCD high notification to the HOST,How can we give the notifications from User space to the serial Driver?

3.How interrupt Endpoints are handled in the serial driver?

4.Where can we find interrupt  endpoint pipes from device to host?

5.In which end point host send IN tokens to the Device?   

Thanks & Regards
Rama Krishna