Return-path: Received: from mail.atheros.com ([12.19.149.2]:50676 "EHLO mail.atheros.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751880Ab0JGQfR (ORCPT ); Thu, 7 Oct 2010 12:35:17 -0400 Message-ID: <4CADF6BF.6070305@atheros.com> Date: Thu, 7 Oct 2010 22:05:11 +0530 From: Bala Shanmugam MIME-Version: 1.0 To: Marcel Holtmann CC: Shanmugamkamatchi Balashanmugam , Luis Rodriguez , Johannes Berg , linux-bluetooth , "linux-kernel@vger.kernel.org" , "linux-wireless@vger.kernel.org" , Deepak Dhamdhere , Sree Durbha Subject: Re: RFC: btusb firmware load help References: <1286349552.6145.11.camel@aeonflux> <1286380566.6145.42.camel@aeonflux> <20101006163816.GE7070@tux> <20101006173949.GG7070@tux> <1286387660.3655.382.camel@jlt3.sipsolutions.net> <1286389697.3655.401.camel@jlt3.sipsolutions.net> ,<20101006183340.GI7070@tux> <44EE5C37ADC36343B0625A05DD408C4850DAD2CA31@CHEXMB-01.global.atheros.com> <1286465072.6145.151.camel@aeonflux> In-Reply-To: <1286465072.6145.151.camel@aeonflux> Content-Type: text/plain; charset="UTF-8"; format=flowed Sender: linux-wireless-owner@vger.kernel.org List-ID: On 10/7/2010 8:54 PM, Marcel Holtmann wrote: > Hi Bala, > >> Thanks Johannes. This would be better option to change PID in firmware >> as blacklisting 3002 might create problems for 3011 chipsets. >> Will try and let you people know. > The misbehaving 3002 needs to be blacklisted in btusb.c anyway. However > after loading the firmware to 3002 device, it should change its PID to > something else. > > I am still trying to figure out if this is one stage firmware loading or > a two stage firmware loading. This is all pretty unclear and nobody has > answered this clearly so far. > > Regards > > Marcel > > Marcel, eeprom based 3011 chips comes up with PID 3000 giving control to DFU driver [ath3k]. ath3k downloads the firmware changing PID to 3002. Now btusb gets control. In sflash based devices to reduce windows suspend/resume time we had a small firmware in flash which enables the device to get detected as Generic Bluetooth USB device with PID 3002. So control reaches btusb when device is plugged in, leaving no option for us to load the actual firmware. Solution would be to blacklist 3002 in btusb, enable ath3k to get control for both the devices, download the firmware and change PID to 3003 so that control with come to btusb. Thanks for your time. Regards, Bala.