Subject: Re: [PATCH] Expose input device usages to userspace
From: Arjan van de Ven <arjan@infradead.org>
To: Elias Naur <elias@oddlabs.com>
Cc: Dmitry Torokhov <dtor_core@ameritech.net>, linux-kernel@vger.kernel.org
In-Reply-To: <200603132154.38876.elias@oddlabs.com>
References: <200603132154.38876.elias@oddlabs.com>
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Date: Mon, 13 Mar 2006 22:02:58 +0100
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On Mon, 2006-03-13 at 21:54 +0100, Elias Naur wrote:
> Hi,
> 
> I believe that the current event input interface is missing some kind of 
> information about the general kind of input device (Mouse, Keyboard, Joystick 
> etc.) so I added a simple ioctl to do just that. The relevant line in 
> include/linux/input.h is:
> 
> #define EVIOCGUSAGE(len)    _IOC(_IOC_READ, 'E', 0x1c, len)         /* get all 
> usages */
> 
> It returns a bit set with the device usages. Current usages are:
> 
> #define USAGE_MOUSE         0x00
> #define USAGE_JOYSTICK      0x01
> #define USAGE_GAMEPAD       0x02
> #define USAGE_KEYBOARD      0x03


I'm not sure that this is a good idea in general.
However when you do it, at least make it a bitmap; things can be both a
mouse and a keyboard for example.


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