Re: Any interest in dwc-otg (aka dwc2) device emulation? For Raspi 3 and below.

[Paul Zimmerman <pauldzim@gmail.com>]

Hi Peter,

I used to work for Synopsys, who is the vendor for the usb-otg IP, and
am the author of the dwc2 driver in the Linux kernel (actually just a
port of the vendor driver to Linux). So I am pretty familiar with the
hardware. But I had to give up all the documentation when I left
Synopsys. So, beyond what I could find on the web (register
description and programming model), I don't have any further
documentation.

Thanks,
Paul

On Tue, Mar 10, 2020 at 2:27 AM Peter Maydell <peter.maydell@linaro.org> wrote:
>
> On Sat, 7 Mar 2020 at 00:34, Paul Zimmerman <pauldzim@gmail.com> wrote:
> >
> > Hi Folks,
> >
> > I have been working on an emulation of the dwc-otg USB controller
> > (host mode only for now), as implemented on the Raspberry Pi 3 and
> > below, and on numerous other embedded platforms. I have it to a point
> > where it works pretty well with the dwc2 driver in the mainline Linux
> > kernel, and with the dwc-otg driver in the Raspbian kernel. Mouse and
> > keyboard work fine, and I *think* the usb-net device is working too,
> > although I have been unsuccessful in connecting to the outside world
> > with it.
>
> Do you have documentation of the hardware? One of the issues
> we've had with this in the past is that we couldn't find the
> hardare specs for the USB controller, so it was a bit difficult
> to tell if a model of it was correct or not.
>
> thanks
> -- PMM