Re: Nokia N900: musb is in wrong state after boot

[Sergei Shtylyov]

On 6/8/2016 3:18 PM, joerg Reisenweber wrote:

> > > > > > Tony, what do you think about that patch?
> > > > >
> > > > > Tony, PING
> > > >
> > > > 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.
> > >
> > > #define MUSB_TEST_FORCE_HOST	0x80
> > >
> > > Can someone confirm on MUSB's docs (and actual running system) that this
> > > does what's supposed to do?
> >
> >     The MUSB programmer's guide says the CID (sic) input is ignored when the
> > Force_Host bit is set. The host mode is entered when the Session bit is
> > set. But I don't have a MUSB hardware readily available to confirm.
> >
> > MBR, Sergei
>
> also says:
>
> While the FORCE_HOST bit remains set, the core will enter Host mode when the
> Session bit is set and **remain in Host mode until the Session bit is cleared
> even if a connected device is disconnected during the session.**
> The operating speed while in this mode **is determined for the setting of the
> FORCE_HS and FORCE_FS bits of the Testmode register** in Section 23.1.4.11.

   Yeah, the MUSB PG says the same.

[...]

> /j

MBR, Sergei