From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1422764AbcFHMSR (ORCPT ); Wed, 8 Jun 2016 08:18:17 -0400 Received: from hydra.openmoko.org ([144.76.72.4]:37025 "EHLO hydra.openmoko.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751454AbcFHMSP convert rfc822-to-8bit (ORCPT ); Wed, 8 Jun 2016 08:18:15 -0400 From: joerg Reisenweber To: Sergei Shtylyov Cc: Felipe Balbi , Tony Lindgren , Pali =?ISO-8859-1?Q?Roh=E1r?= , Felipe Balbi , Greg Kroah-Hartman , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, Ivaylo Dimitrov , Sebastian Reichel , Aaro Koskinen , Pavel Machek , Nishanth Menon Subject: Re: Nokia N900: musb is in wrong state after boot Date: Wed, 08 Jun 2016 14:18:03 +0200 Message-ID: <17243006.AtPKaaqTIG@saturn> User-Agent: KMail/4.11.5 (Linux/3.12.57-44-desktop; KDE/4.11.5; x86_64; ; ) In-Reply-To: <71cb45ec-a269-d510-df34-eb6eaa781da8@cogentembedded.com> References: <201601091616.04193@pali> <87h9d49exz.fsf@linux.intel.com> <71cb45ec-a269-d510-df34-eb6eaa781da8@cogentembedded.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT Content-Type: text/plain; charset="iso-8859-1" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed 08 June 2016 15:04:02 Sergei Shtylyov wrote: > On 6/8/2016 1:02 PM, Felipe Balbi wrote: > >> * Pali Rohár [160607 05:53]: > >>>> 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. see http://talk.maemo.org/showthread.php?p=685367 It's not any fully operational hostmode. /j -- () ascii ribbon campaign /\ against html e-mail - against proprietary attachments http://www.georgedillon.com/web/html_email_is_evil.shtml http://www.nonhtmlmail.org/campaign.html http://www.georgedillon.com/web/html_email_is_evil_still.shtml http://www.gerstbach.at/2004/ascii/ (German)