On Tuesday 04 November 2014 10:25 AM, Marek Vasut wrote:
On Monday, November 03, 2014 at 04:46:48 PM, Fabio Estevam wrote:
On Mon, Nov 3, 2014 at 3:33 AM, Sanchayan Maity
maitysanchayan@gmail.com wrote:
Hello,
Any pointers?
Adding Marek and Stefan on Cc in case they can provide some help.
Regards,
Fabio Estevam
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?
See include/configs/sansa_fuze_plus.h , you need the gadget driver for the function you want to implement , in this case it's ethernet for example (selected via CONFIG_USB_ETH_CDC ).
An example of DFU/UMS can be found in include/configs/exynos4-common.h and to activate those, you need to use the 'dfu' or 'ums' commands.
Thank you Marek. I had enabled usb ether options already and was trying to test USB client functionality with RNDIS. For some reason it was not working and i was not able to trace the issue and subsequently was not sure about the client part. Your inputs cleared my doubts. I tried UMS and DFU. UMS is working just fine and i can download the respective images through DFU. Though this DFU is not working full proof, but, i can figure that out now i feel.
Thanks again for your inputs. Cheers!
Best Regards, Sanchayan.
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.
There isn't any, so ask away ;-)
Hope i am asking the right questions.
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Best regards, Marek Vasut