Is it possible to use USB-OTG as EHCI host in U-Boot on Sabrelite board?

[rafalfabich]

Hi all,

I am Rafal and this is my first post here, so I would like to say hello to everyone :smileyhappy:

I have been using the Sabrelite board from Boundary Devices for some time and now I have been working on U-Boot.

I use the U-Boot code from Boundary Devices and the current implementation supports Host1 only. I would like to use OTG as host but the OTG is unfortunately not supported. I wanted to implemet the lowest layer for the ehci driver (like it is done for Host1) but it does not seem to work. The result is that the U-Boot creates the EHCI hub, but no device is detected. I also tried to follow the SDK code which downloaded from here, but I did not succeed.

I suppose it is possible to use USG-OTG instead of Host1 as EHCI host in U-Boot. Is there something I am missing?

By the way, the device is connected via special adapter and the power (5V) is provided to it.

Kind regards,

Rafal

[rafalfabich · Accepted solution]

Hi again,

Sorry for answering to myself, but the problem seems to be solved.

In fact, unlike the Host1, the OTG controller had to be reinitialized after EHCI reset.

Regards,

Rafal

[fabio_estevam]

Hi Rafal,

Great, can you please generate a patch for this and submit it to the u-boot mailing list?

Regards,

Fabio Estevam