linux-kernel - RE: RFC: btusb firmware load help

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Date:	Thu, 7 Oct 2010 20:39:37 +0530
From:	Shanmugamkamatchi Balashanmugam 
	<Shanmugamkamatchi.Balashanmugam@...eros.com>
To:	Luis Rodriguez <Luis.Rodriguez@...eros.com>,
	Johannes Berg <johannes@...solutions.net>
CC:	Luis Rodriguez <Luis.Rodriguez@...eros.com>,
	Marcel Holtmann <holtmann@...ux.intel.com>,
	linux-bluetooth <linux-bluetooth@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
	Deepak Dhamdhere <Deepak.Dhamdhere@...eros.com>,
	Sree Durbha <Sree.Durbha@...eros.com>
Subject: RE: RFC: btusb firmware load help


________________________________________
From: linux-bluetooth-owner@...r.kernel.org [linux-bluetooth-owner@...r.kernel.org] On Behalf Of Luis R. Rodriguez [lrodriguez@...eros.com]
Sent: Thursday, October 07, 2010 12:03 AM
To: Johannes Berg
Cc: Luis Rodriguez; Marcel Holtmann; linux-bluetooth; linux-kernel@...r.kernel.org; linux-wireless@...r.kernel.org; Deepak Dhamdhere; Sree Durbha
Subject: Re: RFC: btusb firmware load help

On Wed, Oct 06, 2010 at 11:28:17AM -0700, Johannes Berg wrote:
> On Wed, 2010-10-06 at 11:26 -0700, Luis R. Rodriguez wrote:
>
> > > Good idea, I forgot about possible firmware changes :) Lets see if our
> > > team can do that. Thanks for all the feedback.
> >
> > Deepak a proof of concept test can involve simply hex-editing the
> > ath3k-1.fw and replacing 0x3002 to 0x3003, then the above patch might
> > work.
>
> $ hd ath3k-1.fw
> ...
> 00000670  00 00 00 00 00 00 00 00  00 00 00 00 f3 0c 02 30  |...............0|
> 00000680  12 01 10 01 e0 01 01 40  f3 0c 02 30 01 00 00 00  |.......@...0....|
> ...
>
> that looks a lot like the IDs right there, in little endian :-)

>Furthermore another idea by johannes is that if we cannot fix this
>in firmware by changing the exposed device ID, we could just check
>in btusb for some USB component that would come alive once the firmware
>does get loaded, like endpoints, or speed, or whatever. But that would
>be last resort.

 > Luis
>--
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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. 

Regards,
Bala.--
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