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Subject: Re: [RFC, PATCH 2/2] gspca pac7302: add support for camera button
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diff -r abfdd03b800d linux/drivers/media/video/gspca/pac7302.c
--- a/linux/drivers/media/video/gspca/pac7302.c	Thu Nov 19 10:34:21 2009 +0100
+++ b/linux/drivers/media/video/gspca/pac7302.c	Sat Nov 21 13:02:44 2009 +0100
@@ -68,8 +68,10 @@

 #define MODULE_NAME "pac7302"

+#include <linux/input.h>
 #include <media/v4l2-chip-ident.h>
 #include "gspca.h"
+#include "input.h"

 MODULE_AUTHOR("Thomas Kaiser thomas@kaiser-linux.li");
 MODULE_DESCRIPTION("Pixart PAC7302");
@@ -1220,6 +1222,37 @@
 }
 #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 struct sd_desc sd_desc = {
 	.name = MODULE_NAME,
@@ -1236,6 +1269,9 @@
 	.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 -- */