gspca pac7302: add support for camera button

Hello Jean-Francois,

thank you for accepting this patch and for the previous suggestions which made it possible
to reach the current state of this patchset. Also thanks for correcting the character
encoding in my name.

Regards,

	Márton Németh

Németh Márton írta:
> From: Márton Németh <nm127@freemail.hu>
> 
> Add support for snapshot button found on Labtec Webcam 2200.
> 
> Signed-off-by: Márton Németh <nm127@freemail.hu>
> ---
> diff -r 875c200a19dc linux/drivers/media/video/gspca/pac7302.c
> --- a/linux/drivers/media/video/gspca/pac7302.c	Sun Jan 17 07:58:51 2010 +0100
> +++ b/linux/drivers/media/video/gspca/pac7302.c	Sun Jan 17 13:47:50 2010 +0100
> @@ -5,6 +5,8 @@
>   * V4L2 by Jean-Francois Moine <http://moinejf.free.fr>
>   *
>   * Separated from Pixart PAC7311 library by M?rton N?meth <nm127@freemail.hu>
> + * Camera button input handling by Márton Németh <nm127@freemail.hu>
> + * Copyright (C) 2009-2010 Márton Németh <nm127@freemail.hu>
>   *
>   * This program is free software; you can redistribute it and/or modify
>   * it under the terms of the GNU General Public License as published by
> @@ -68,6 +70,7 @@
> 
>  #define MODULE_NAME "pac7302"
> 
> +#include <linux/input.h>
>  #include <media/v4l2-chip-ident.h>
>  #include "gspca.h"
> 
> @@ -1164,6 +1167,37 @@
>  }
>  #endif
> 
> +#ifdef CONFIG_INPUT
> +static int sd_int_pkt_scan(struct gspca_dev *gspca_dev,
> +			u8 *data,		/* interrupt packet data */
> +			int len)		/* interrput packet length */
> +{
> +	int ret = -EINVAL;
> +	u8 data0, data1;
> +
> +	if (len == 2) {
> +		data0 = data[0];
> +		data1 = data[1];
> +		if ((data0 == 0x00 && data1 == 0x11) ||
> +		    (data0 == 0x22 && data1 == 0x33) ||
> +		    (data0 == 0x44 && data1 == 0x55) ||
> +		    (data0 == 0x66 && data1 == 0x77) ||
> +		    (data0 == 0x88 && data1 == 0x99) ||
> +		    (data0 == 0xaa && data1 == 0xbb) ||
> +		    (data0 == 0xcc && data1 == 0xdd) ||
> +		    (data0 == 0xee && data1 == 0xff)) {
> +			input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1);
> +			input_sync(gspca_dev->input_dev);
> +			input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
> +			input_sync(gspca_dev->input_dev);
> +			ret = 0;
> +		}
> +	}
> +
> +	return ret;
> +}
> +#endif
> +
>  /* sub-driver description for pac7302 */
>  static const struct sd_desc sd_desc = {
>  	.name = MODULE_NAME,
> @@ -1180,6 +1214,9 @@
>  	.set_register = sd_dbg_s_register,
>  	.get_chip_ident = sd_chip_ident,
>  #endif
> +#ifdef CONFIG_INPUT
> +	.int_pkt_scan = sd_int_pkt_scan,
> +#endif
>  };
> 
>  /* -- module initialisation -- */
> 
> 
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