linux-kernel - Re: [RFC] What are the goals for the architecture of an in-kernel IR system?

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Date:	Tue, 08 Dec 2009 09:23:19 -0200
From:	Mauro Carvalho Chehab <mchehab@...hat.com>
To:	Jon Smirl <jonsmirl@...il.com>
CC:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Krzysztof Halasa <khc@...waw.pl>,
	hermann pitton <hermann-pitton@...or.de>,
	Christoph Bartelmus <lirc@...telmus.de>, awalls@...ix.net,
	j@...nau.net, jarod@...hat.com, jarod@...sonet.com,
	kraxel@...hat.com, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
	superm1@...ntu.com
Subject: Re: [RFC] What are the goals for the architecture of an in-kernel
 IR 	system?

Jon Smirl wrote:
> On Mon, Dec 7, 2009 at 1:41 PM, Dmitry Torokhov
> <dmitry.torokhov@...il.com> wrote:
>> That is why I think we should go the other way around - introduce the
>> core which receivers could plug into and decoder framework and once it
>> is ready register lirc-dev as one of the available decoders.
> 
> The core needs to allow for RF remotes too.
> 
> -Bluetooth remotes are already in kernel somehow, I don't know how they work,
> -RF4CE, the 802.15.4 stack has been recently merged, the remotes use a
> protocol on top of that. These remotes will hit the consumer market
> next year. Sony, Panasonic and other big names are behind this.
> -Zwave, the Harmony remotes use Zwave. There is no Zwave support in
> the kernel that I am aware of. Zwave is proprietary.
> 
> After these protocols are decoded you end up with scancodes. The
> scancodes need to get injected into input somehow and then flow
> through the mapping process. Decoding down to the scancodes probably
> happens over in the networking code.
> 
> After an in-kernel IR decoder runs it needs to hand off the scancodes
> into the input subsystem. This same API can be used by the networking
> code to hand off RF scancodes.
> 

Yes, the same core should be able to work with non infra red remotes, but, depending
on how the device is implemented.

Cheers,
Mauro.
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