Date: Tue, 16 Jul 2013 15:40:12 +0300
From: Felipe Balbi <balbi@ti.com>
To: Federico Vaga <federico.vaga@gmail.com>
CC: <balbi@ti.com>, Paul Zimmerman <paul.zimmerman@synopsys.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        <linux-usb@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <giancarlo.asnaghi@st.com>
Subject: Re: DWC2 and/or S3C-HSOTG for STA2X11 board
Message-ID: <20130716124012.GB15036@arwen.pp.htv.fi>
Reply-To: <balbi@ti.com>
References: <38175373.Cq6zxae9tO@harkonnen>
 <20130716120425.GA32038@arwen.pp.htv.fi>
 <2703444.NGzofRFyoM@harkonnen>
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On Tue, Jul 16, 2013 at 02:27:43PM +0200, Federico Vaga wrote:
> Thank you Felipe
>=20
> [add CC Giancarlo from ST]
>=20
> On Tuesday 16 July 2013 15:04:25 Felipe Balbi wrote:
> > Hi,
> >=20
> > On Tue, Jul 16, 2013 at 02:01:33PM +0200, Federico Vaga wrote:
> > > Hello,
> > >=20
> > > I have an x86 board made by STMicroelectronics (STA2X11) with the Syn=
opsis
> > > USB-OTG DesignWare 2 on it and connected through the PCI-e bus.
> > >=20
> > > I know that there are two drivers for the same controller:
> > >    (host)   drivers/staging/dwc2/*
> > >    (device) drivers/usb/gadget/s3c-hsotg.{c|h}
> > >=20
> > > So, at the moment I cannot have a board with both host/device working=
 at
> > > the same time. I have to choose to use the block as device or host,
> > > right?
> > >=20
> > > I know that the plan is to merge the s3c-hsotg in the dwc2 driver
> > > (https://lwn.net/Articles/540283/). Are still accepted patch to s3c-h=
sotg?
> > > Or it is work in progress right now (soon), so it is better to wait a=
fter
> > > the merge?
> > >=20
> > > In order to use the s3c-hsotg I must implement a PCI wrapper that uses
> > > this
> > > driver. It will be accepted in the kernel even if it will be removed
> > > sooner or later because of the driver merge?
> >=20
> > currently s3c-hsotg has too much knowledge of the Samsung platform. My
> > suggestion would be to help dwc2 get in better shape. It should be
> > rather easy to support your board since that already has a PCI wrapper
> > driver.
> >=20
> > So, stick to host only for now, help clean up dwc2 and move it out of
> > staging, then later it should be fairly simple to merge the device side
> > in it.
>=20
> Is there something like a TODO list of dwc2 known problems?

Paul should be the best to answer that :-s

sorry

--=20
balbi

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