Subject: Re: [RFC v2] Another approach to IR
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From: Jarod Wilson <jarod@wilsonet.com>
In-Reply-To: <4B16C10E.6040907@redhat.com>
Date: Wed, 2 Dec 2009 14:55:38 -0500
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>,
       Devin Heitmueller <dheitmueller@kernellabs.com>,
       Jon Smirl <jonsmirl@gmail.com>,
       Maxim Levitsky <maximlevitsky@gmail.com>, awalls@radix.net,
       j@jannau.net, jarod@redhat.com, khc@pm.waw.pl,
       linux-input@vger.kernel.org, linux-kernel@vger.kernel.org,
       linux-media@vger.kernel.org, lirc-list@lists.sourceforge.net,
       superm1@ubuntu.com, Christoph Bartelmus <lirc@bartelmus.de>
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To: Mauro Carvalho Chehab <mchehab@redhat.com>
Sender: linux-kernel-owner@vger.kernel.org
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On Dec 2, 2009, at 2:33 PM, Mauro Carvalho Chehab wrote:

> Dmitry Torokhov wrote:
>> 
...
>>>> (for each remote/substream that they can recognize).
>>> I'm assuming that, by remote, you're referring to a remote receiver (and not to 
>>> the remote itself), right?
>> 
>> If we could separate by remote transmitter that would be the best I
>> think, but I understand that it is rarely possible?
> 
> IMHO, the better is to use a separate interface for the IR transmitters,
> on the devices that support this feature. There are only a few devices
> I'm aware of that are able to transmit IR codes.

If I'm thinking clearly, there are only three lirc kernel drivers that support transmit, lirc_mceusb, lirc_zilog and lirc_serial. The mceusb driver was posted, so I won't rehash what it is here. The zilog driver binds to a Zilog z80 microprocessor thingy (iirc) exposed via i2c, found on many Hauppauge v4l/dvb devices (PVR-150, HVR-1600, HD-PVR, etc). The serial driver is fairly self-explanatory as well.

There are also a few userspace-driven devices that do transmit, but I'm assuming they're (currently) irrelevant to this discussion.

-- 
Jarod Wilson
jarod@wilsonet.com


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