V4L/DVB (12977): gspca - m5602-ov7660: Create blue gain control

Hook up a blue gain v4l2 controller
Signed-off-by: Erik Andrén <erik.andren@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/gspca/m5602/m5602_ov7660.c

@@ -20,6 +20,8 @@
 
 static int ov7660_get_gain(struct gspca_dev *gspca_dev, __s32 *val);
 static int ov7660_set_gain(struct gspca_dev *gspca_dev, __s32 val);
+static int ov7660_get_blue_gain(struct gspca_dev *gspca_dev, __s32 *val);
+static int ov7660_set_blue_gain(struct gspca_dev *gspca_dev, __s32 val);
 
 const static struct ctrl ov7660_ctrls[] = {
 #define GAIN_IDX 1
@@ -37,6 +39,22 @@ const static struct ctrl ov7660_ctrls[] = {
 		.set = ov7660_set_gain,
 		.get = ov7660_get_gain
 	},
+#define BLUE_BALANCE_IDX 2
+	{
+		{
+			.id		= V4L2_CID_BLUE_BALANCE,
+			.type		= V4L2_CTRL_TYPE_INTEGER,
+			.name		= "blue balance",
+			.minimum	= 0x00,
+			.maximum	= 0x7f,
+			.step		= 0x1,
+			.default_value	= OV7660_DEFAULT_BLUE_GAIN,
+			.flags		= V4L2_CTRL_FLAG_SLIDER
+		},
+		.set = ov7660_set_blue_gain,
+		.get = ov7660_get_blue_gain
+	},
+
 };
 
 static struct v4l2_pix_format ov7660_modes[] = {
@@ -194,6 +212,31 @@ static int ov7660_set_gain(struct gspca_dev *gspca_dev, __s32 val)
 	return err;
 }
 
+static int ov7660_get_blue_gain(struct gspca_dev *gspca_dev, __s32 *val)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+	s32 *sensor_settings = sd->sensor_priv;
+
+	*val = sensor_settings[BLUE_BALANCE_IDX];
+	PDEBUG(D_V4L2, "Read blue balance %d", *val);
+	return 0;
+}
+
+static int ov7660_set_blue_gain(struct gspca_dev *gspca_dev, __s32 val)
+{
+	int err;
+	u8 i2c_data;
+	struct sd *sd = (struct sd *) gspca_dev;
+	s32 *sensor_settings = sd->sensor_priv;
+
+	PDEBUG(D_V4L2, "Setting blue balance to %d", val);
+
+	sensor_settings[BLUE_BALANCE_IDX] = val;
+
+	err = m5602_write_sensor(sd, OV7660_BLUE_GAIN, &i2c_data, 1);
+	return err;
+}
+
 static void ov7660_dump_registers(struct sd *sd)
 {
 	int address;

drivers/media/video/gspca/m5602/m5602_ov7660.h

@@ -199,8 +199,6 @@ static const unsigned char init_ov7660[][4] =
 
 	{SENSOR, OV7660_COM7, 0x80},
 	{SENSOR, OV7660_CLKRC, 0x80},
-	{SENSOR, OV7660_BLUE_GAIN, 0x80},
-	{SENSOR, OV7660_RED_GAIN, 0x80},
 	{SENSOR, OV7660_COM9, 0x4c},
 	{SENSOR, OV7660_OFON, 0x43},
 	{SENSOR, OV7660_COM12, 0x28},
@@ -264,8 +262,6 @@ static const unsigned char init_ov7660[][4] =
 	{SENSOR, OV7660_OFON, 0x0c},
 	{SENSOR, OV7660_COM2, 0x11},
 	{SENSOR, OV7660_COM7, 0x05},
-	{SENSOR, OV7660_BLUE_GAIN, 0x80},
-	{SENSOR, OV7660_RED_GAIN, 0x80},
 
 	{BRIDGE, M5602_XB_GPIO_DIR, 0x01},
 	{BRIDGE, M5602_XB_GPIO_DAT, 0x04},