From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx2.redhat.com ([66.187.237.31]:43477 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751539AbYIUAVW (ORCPT ); Sat, 20 Sep 2008 20:21:22 -0400 Subject: Re: [PATCH] b43: Fix Bluetooth coexistence SPROM coding error for Motorola 7010 variant of BCM4306 From: Dan Williams To: Johannes Berg Cc: "Luis R. Rodriguez" , Michael Buesch , bbullins@triad.rr.com, linux-wireless@vger.kernel.org, bcm43xx-dev@lists.berlios.de, Larry Finger In-Reply-To: <1221945075.3023.14.camel@johannes.berg> References: <48d401da.Q+F4HRESoxeIVa3r%Larry.Finger@lwfinger.net> <200809201744.55571.mb@bu3sch.de> <1221943895.3023.1.camel@johannes.berg> <43e72e890809201359kb65f3d3qb618129ae6b528f4@mail.gmail.com> <1221944575.3023.10.camel@johannes.berg> <43e72e890809201405u63f57680u63ce0329c8cd31a2@mail.gmail.com> (sfid-20080920_230522_937343_EF72BDF9) <1221945075.3023.14.camel@johannes.berg> Content-Type: text/plain Date: Sat, 20 Sep 2008 17:19:11 -0700 Message-Id: <1221956351.15866.1.camel@localhost.localdomain> (sfid-20080921_022127_596403_D90B994F) Mime-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org List-ID: On Sat, 2008-09-20 at 23:11 +0200, Johannes Berg wrote: > On Sat, 2008-09-20 at 14:05 -0700, Luis R. Rodriguez wrote: > > > >> > Does anyone actually make laptops that use these bluetooth coexistence > > >> > pins? All CSR bluetooth chips do it automatically I'm told, maybe we > > >> > should just kill them completely. > > >> > > >> Regardless of the wireless card? Or just for bcm? > > > > > > Well just for b43(legacy), but out of curiosity, does any BT chip use > > > these pins anyway? Well I guess _somebody_ has to buy BCMs BT chips, > > > but ... > > > > BCM BT chips? I thought you said CSR? > > Well the thing is, BCM wifi chips have these IO pins that tell the BT > chip what the wifi chip is doing. But CSR chips for instance don't care, > they just check what the wifi chip is doing on the antenna. So those > don't use those IO pins. Marvell SD 8686 have these pins too; I have at least one sample of such a setup. Not that I have had time yet to implement it... but this sort of thing exists of course. Dan > Hence, I'm wondering if there's any use in the IO pins at all. But they > must have added them for a reason, presumably because their own BT chips > can use those inputs... > > Anyway, mostly just idly wondering, since most of the time it works fine > and the EEPROM is actually done right I guess we should keep them on. > > johannes