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From: Pali =?utf-8?q?Roh=C3=A1r?= <pali.rohar@gmail.com>
To: Felipe Balbi <felipe.balbi@linux.intel.com>
Subject: Re: Nokia N900: musb is in wrong state after boot
Date: Wed, 8 Jun 2016 12:19:52 +0200
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Cc: Tony Lindgren <tony@atomide.com>, joerg Reisenweber <joerg@openmoko.org>,
        Felipe Balbi <balbi@ti.com>,
        "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
        linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-omap@vger.kernel.org,
        Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>,
        Sebastian Reichel <sre@kernel.org>,
        Aaro Koskinen <aaro.koskinen@iki.fi>, Pavel Machek <pavel@ucw.cz>,
        Nishanth Menon <nm@ti.com>
References: <201601091616.04193@pali> <20160608095321.GH22406@atomide.com> <87h9d49exz.fsf@linux.intel.com>
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On Wednesday 08 June 2016 12:02:00 Felipe Balbi wrote:
> Hi,
>=20
> Tony Lindgren <tony@atomide.com> writes:
> > * Pali Roh=C3=A1r <pali.rohar@gmail.com> [160607 05:53]:
> >> > Tony, what do you think about that patch?
> >>=20
> >> Tony, PING
> >=20
> > Yeah I don't know, AFAIK we don't have a generic way to
> > force MUSB to change mode without ID pin. If you have figured
> > something generic for that which does not actually tinker with
> > the PHY registers directly, that should be the generic
> > musb_set_mode() that we've been wondering about for years.
>=20
> #define MUSB_TEST_FORCE_HOST	0x80
>=20
> Can someone confirm on MUSB's docs (and actual running system) that
> this does what's supposed to do?

Maybe this can help you:

https://garage.maemo.org/plugins/ggit/browse.php/?p=3Dkernel-power;a=3Dblob=
;f=3Dkernel-power-2.6.28/debian/patches/usbhostmode.diff

Patch for 2.6.28 omap1 kernel which adds usb host mode support for Nokia
N900. Look for MUSB_TESTMODE, MUSB_TEST_FORCE_HOST is called together
with MUSB_TEST_FORCE_FS or MUSB_TEST_FORCE_HS (line 355).

=2D-=20
Pali Roh=C3=A1r
pali.rohar@gmail.com

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