From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sanchayan Maity Date: Mon, 03 Nov 2014 11:03:35 +0530 Subject: [U-Boot] Query on the ci_udc driver for USB client implementation In-Reply-To: <5451D039.1090609@gmail.com> References: <5451D039.1090609@gmail.com> Message-ID: <545713AF.5090008@gmail.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hello, Any pointers? Thanks & Regards, Sanchayan Maity. On Thursday 30 October 2014 11:14 AM, Sanchayan Maity wrote: > 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. >