linux-kernel - Re: [PATCH 3/3 v2] lirc driver for SoundGraph iMON IR receivers and displays

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Message-ID: <4B0A8710.9060104@redhat.com>
Date:	Mon, 23 Nov 2009 10:58:56 -0200
From:	Mauro Carvalho Chehab <mchehab@...hat.com>
To:	Jarod Wilson <jarod@...hat.com>
CC:	linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
	linux-media@...r.kernel.org, Janne Grunau <j@...nau.net>,
	Christoph Bartelmus <lirc@...telmus.de>
Subject: Re: [PATCH 3/3 v2] lirc driver for SoundGraph iMON IR receivers and
 displays

Jarod Wilson wrote:
> lirc driver for SoundGraph iMON IR receivers and displays
> 
> Successfully tested with multiple devices with and without displays.
> 


> +static struct usb_device_id imon_usb_id_table[] = {
> +	/* TriGem iMON (IR only) -- TG_iMON.inf */
> +	{ USB_DEVICE(0x0aa8, 0x8001) },
...

Another set of USB vendor ID's... this time, vendors weren't described. The
same comment I did on patch 2/3 applies here... IMO, we should really try
to create a global list of vendors/devices on kernel. Of course this is not
a non-go issue, as it is already present on several other USB drivers.

> +
> +	/*
> +	 * Translate received data to pulse and space lengths.
> +	 * Received data is active low, i.e. pulses are 0 and
> +	 * spaces are 1.
> +	 *
> +	 * My original algorithm was essentially similar to
> +	 * Changwoo Ryu's with the exception that he switched
> +	 * the incoming bits to active high and also fed an
> +	 * initial space to LIRC at the start of a new sequence
> +	 * if the previous bit was a pulse.
> +	 *
> +	 * I've decided to adopt his algorithm.
> +	 */
> +

Before digging into all code details, am I wrong or this device has the
pulse/space decoding inside the chip?

In this case, we shouldn't really be converting their IR keystroke events into
a pseudo set of pulse/space marks, but use the standard events interface.

Cheers,
Mauro.

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