From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from lists.s-osg.org ([54.187.51.154]:45456 "EHLO lists.s-osg.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751961AbaKQO7U (ORCPT ); Mon, 17 Nov 2014 09:59:20 -0500 Date: Mon, 17 Nov 2014 12:59:09 -0200 From: Mauro Carvalho Chehab To: Sean Young Cc: Andy Walls , Jarod Wilson , Dan Carpenter , Aya Mahfouz , linux-media@vger.kernel.org, Greg Kroah-Hartman Subject: Re: staging: media: lirc: lirc_zilog.c: replace custom print macros with dev_* and pr_* Message-ID: <20141117125909.2729440b@recife.lan> In-Reply-To: <20141109213517.GA1349@gofer.mess.org> References: <20141031130600.GA16310@mwanda> <20141031142644.GA4166@localhost.localdomain> <20141031143541.GM6890@mwanda> <20141106124629.GA898@gofer.mess.org> <20141106110549.1812acc7@recife.lan> <20141106132113.GA1367@gofer.mess.org> <697D038C-4BD9-4113-8E7E-B89BACF09AC2@gmail.com> <6BB6C08A-32A2-4A37-B6F7-332556C9626E@gmail.com> <20141109213517.GA1349@gofer.mess.org> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-media-owner@vger.kernel.org List-ID: Em Sun, 9 Nov 2014 21:35:17 +0000 Sean Young escreveu: > On Thu, Nov 06, 2014 at 08:56:47AM -0500, Andy Walls wrote: > > On November 6, 2014 8:54:28 AM EST, Andy Walls wrote: > > >Sean, > > > > > >Ir-kbd-i2c was never intended for Tx. > > > > > >You can transmit *short* arbitrary pulse-space streams with the zilog > > >chip, by feeding it a parameter block that has the pulse timing > > >information and then subsequently has been obfuscated. The firmware > > >file that LIRC uses in userspace is full of predefined versions of > > >these things for RC5 and NEC IIRC. This LIRC firmware file also holds > > >the (de)obfuscation key. > > > > > >I've got a bunch of old notes on this stuff from essentially reverse > > >engineering the firmware in the Z8. IANAL, but to me, its use in > > >developing in-kernel stuff could be dubious. > > > > > >Regards, > > >Andy > > Very interesting. > > I had considered reverse engineering the z8 firmware but I never found a > way to access it. I guess we have three options: > > 1. I could use Andy's notes to implement Tx. I have not seen the original > firmware code so I'm not contaminated by reverse engineering it. IANAL > but I thought this is an acceptable way of writing a driver. > > 2. Hauppauge could prove us with documentation to write a driver with. I tried to get some info about that, but they are unable to get anything related to this design so far. So, I think that, if you have some time to dedicate to it, the best would be to go for option #1. > 3. Leave it as-is, lirc_zilog will eventually be deleted from staging as it > can't be ported to rc-core. > > > Sean > -- > To unsubscribe from this list: send the line "unsubscribe linux-media" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html