Hello, 

I am currently implementing USB Host and client support for Freescale Vybrid 
platform in u-boot. I managed to get the host implementation working. 

For the host side, usb start calls usb_init(), which in turns call, 
usb_lowlevel_init(), from there into the ehic_hcd_init() of my implementation. 
So, setting up the necessary clocks and plls for USB in my implementation and 
then setting up the usb_ehci, ehci_hccr and echi_hcor structures was all. The 
flow and setup required i was able to trace.

The USB client part is not clear to me. I was thinking i can use the ci_udc 
driver somehow to implement the client part. How can i use the ci_udc driver to 
implement client functionality?. From what i could see, the 
usb_gadget_driver_register() is suppose to be the first call. But, i couldn't 
trace from where this gets called or the flow and setup is suppose to be. OR Is 
a separate client driver required and nothing generic can be used akin to how 
it could be done for host?

Sorry if i am asking this question in the wrong place. I couldn't find anyone 
in the u-boot IRC channel nor find something similar to the kernel-newbies 
mailing list. 

Hope i am asking the right questions. 

Thanks & Regards,
Sanchayan Maity.
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