linux-kernel - Re: [PATCH 1/3] xpad.c: Added flags into xpad_device structure and removed dpad

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Message-Id: <200705022238.36454.dtor@insightbb.com>
Date:	Wed, 2 May 2007 22:38:35 -0400
From:	Dmitry Torokhov <dtor@...ightbb.com>
To:	Jan Kratochvil <honza@...os.cz>
Cc:	Greg Kroah-Hartman <gregkh@...e.de>,
	linux-input@...ey.karlin.mff.cuni.cz,
	linux-usb-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, Jiri Kosina <jkosina@...e.cz>
Subject: Re: [PATCH 1/3] xpad.c: Added flags into xpad_device structure and removed dpad_mapping.

Hi Jan,

On Wednesday 02 May 2007 11:01, Jan Kratochvil wrote:
> This changes are expected to simplify further improves of this driver,
> We will need to add information if the driver is xbox360 device or not.
> 
> Second option was to simply add u8 is_360, but what if we'll need to know
> if device is a wheel? Or if the device can have keyboard (or headset) attached.
> 

...

> -#define MAP_DPAD_TO_BUTTONS    0
> -#define MAP_DPAD_TO_AXES       1
> -#define MAP_DPAD_UNKNOWN       -1
> +#define XPAD_FLAGS_DPAD_TO_BUTTONS    (1 << 0)
> +#define XPAD_FLAGS_DPAD_TO_AXES       (1 << 1)
> +#define XPAD_FLAGS_DPAD_UNKNOWN       (1 << 2)
> 

Turning this into bitmaps suggests that all of these could be set which is
not the case. Since there are 3 spare bytes in xpad_device structure to
use for additional flags/bitmaps I'd leave dpad_mapping alone.

-- 
Dmitry
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