Re: DesignWare USB OTG dwc_otg issues with high-speed hubs

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On Sat, Aug 11, 2012 at 12:13:58AM +0400, Paul Fertser wrote:
> Hi Felipe,
> 
> On Fri, Aug 10, 2012 at 10:39:52PM +0300, Felipe Balbi wrote:
> > On Fri, Aug 10, 2012 at 10:35:20PM +0400, Paul Fertser wrote:
> > > I'm using an RT3052F device (DIR-620 SOHO wifi router) with current
> > > OpenWrt trunk and its USB port is handled by the dwc_otg driver. The
> > > source is available from their repository:
> > > https://dev.openwrt.org/browser/trunk/target/linux/ramips/files/drivers/usb/dwc_otg
> > 
> > there's no such driver in mainline kernel. We cannot support you. You
> > need to ask help from openwrt project.
> 
> Well, sorry, but i'm not sure that's entirely correct. People involved

Will you ask about linux kernel on a BSD mailing list just because some
linux guys hang out there ?

> in writing and using that driver are quite possibly hanging around
> here. I know this is not an upstream driver (in fact it was ported
> from Ralink's SDK by Layne Edwards) and i understand that vendor

Since Layne's in Cc, you could very well post to openwrt mailing list
and Cc him, just like you did here ;-)

> drivers usually suck big time.
> 
> OTOH, vendor drivers are quite often a valuable source of the
> information and having a link to a version that works on current
> kernels might be beneficial as one can do a side-by-side comparison
> and testing.

Still mate, if it isn't in mainline, it's very unlikely anyone will be
able to help you. You're much better off stiking to the support channels
of whoever provided you the kernel you're using.

> Of course i would appreciate someone sharing his ideas about another,
> proper upstream driver that is usable on an RT3052 target.

Samsumg Exynos platforms use this same IP and their s3c_hsotg.c driver
is being cleaned up so it can be re-used by other platforms. They need
help, however. If you want to help, you're very much welcome. The effort
is still in early phase and there's lots to be done.

> I hope i put it clearly enough so that a person not interested in
> non-upstream code won't waste his time reading this thread. I hope
> this is enough of an excuse for CCing the list. If not, please let me
> know.

If you don't want to waste upstream developer's time, then don't post
non-upstream related issues to the upstream mailing list ;-)

-- 
balbi

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