V4L/DVB (12978): gspca - m5602-ov7660: Add red gain control
Erik Andrén [Wed, 17 Jun 2009 06:14:12 +0000 (03:14 -0300)]
Hook up the red gain 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

index 8125c5b..9d0cf2c 100644 (file)
@@ -22,6 +22,8 @@ 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);
+static int ov7660_get_red_gain(struct gspca_dev *gspca_dev, __s32 *val);
+static int ov7660_set_red_gain(struct gspca_dev *gspca_dev, __s32 val);
 
 const static struct ctrl ov7660_ctrls[] = {
 #define GAIN_IDX 1
@@ -54,7 +56,21 @@ const static struct ctrl ov7660_ctrls[] = {
                .set = ov7660_set_blue_gain,
                .get = ov7660_get_blue_gain
        },
-
+#define RED_BALANCE_IDX 3
+       {
+               {
+                       .id             = V4L2_CID_RED_BALANCE,
+                       .type           = V4L2_CTRL_TYPE_INTEGER,
+                       .name           = "red balance",
+                       .minimum        = 0x00,
+                       .maximum        = 0x7f,
+                       .step           = 0x1,
+                       .default_value  = OV7660_DEFAULT_RED_GAIN,
+                       .flags          = V4L2_CTRL_FLAG_SLIDER
+               },
+               .set = ov7660_set_red_gain,
+               .get = ov7660_get_red_gain
+       },
 };
 
 static struct v4l2_pix_format ov7660_modes[] = {
@@ -237,6 +253,31 @@ static int ov7660_set_blue_gain(struct gspca_dev *gspca_dev, __s32 val)
        return err;
 }
 
+static int ov7660_get_red_gain(struct gspca_dev *gspca_dev, __s32 *val)
+{
+       struct sd *sd = (struct sd *) gspca_dev;
+       s32 *sensor_settings = sd->sensor_priv;
+
+       *val = sensor_settings[RED_BALANCE_IDX];
+       PDEBUG(D_V4L2, "Read red balance %d", *val);
+       return 0;
+}
+
+static int ov7660_set_red_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 red balance to %d", val);
+
+       sensor_settings[RED_BALANCE_IDX] = val;
+
+       err = m5602_write_sensor(sd, OV7660_RED_GAIN, &i2c_data, 1);
+       return err;
+}
+
 static void ov7660_dump_registers(struct sd *sd)
 {
        int address;