V4L/DVB (11470): gspca - m5602-mt9m111: Implement an auto white balancing control

Signed-off-by: Erik Andr?n <erik.andren@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 50 insertions, 0 deletions

diff --git a/drivers/media/video/gspca/m5602/m5602_mt9m111.c b/drivers/media/video/gspca/m5602/m5602_mt9m111.c
index a057b8d5d748..37a7fc82a53c 100644
--- a/drivers/media/video/gspca/m5602/m5602_mt9m111.c
+++ b/drivers/media/video/gspca/m5602/m5602_mt9m111.c
@@ -24,6 +24,11 @@ static int mt9m111_get_hflip(struct gspca_dev *gspca_dev, __s32 *val);
 static int mt9m111_set_hflip(struct gspca_dev *gspca_dev, __s32 val);
 static int mt9m111_get_gain(struct gspca_dev *gspca_dev, __s32 *val);
 static int mt9m111_set_gain(struct gspca_dev *gspca_dev, __s32 val);
+static int mt9m111_set_auto_white_balance(struct gspca_dev *gspca_dev,
+                                         __s32 val);
+static int mt9m111_get_auto_white_balance(struct gspca_dev *gspca_dev,
+                                          __s32 *val);
+
 
 static struct v4l2_pix_format mt9m111_modes[] = {
         {
@@ -81,6 +86,20 @@ const static struct ctrl mt9m111_ctrls[] = {
                 },
                 .set = mt9m111_set_gain,
                 .get = mt9m111_get_gain
+        },
+#define AUTO_WHITE_BALANCE_IDX 3
+        {
+                {
+                        .id             = V4L2_CID_AUTO_WHITE_BALANCE,
+                        .type           = V4L2_CTRL_TYPE_BOOLEAN,
+                        .name           = "auto white balance",
+                        .minimum        = 0,
+                        .maximum        = 1,
+                        .step           = 1,
+                        .default_value  = 0,
+                },
+                .set = mt9m111_set_auto_white_balance,
+                .get = mt9m111_get_auto_white_balance
         }
 };
 
@@ -273,6 +292,37 @@ static int mt9m111_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
         return 0;
 }
 
+static int mt9m111_set_auto_white_balance(struct gspca_dev *gspca_dev,
+                                          __s32 val)
+{
+        struct sd *sd = (struct sd *) gspca_dev;
+        s32 *sensor_settings = sd->sensor_priv;
+        int err;
+        u8 data[2];
+
+        err = m5602_read_sensor(sd, MT9M111_CP_OPERATING_MODE_CTL, data, 2);
+        if (err < 0)
+                return err;
+
+        sensor_settings[AUTO_WHITE_BALANCE_IDX] = val & 0x01;
+        data[0] = ((data[0] & 0xfd) | ((val & 0x01) << 1));
+
+        err = m5602_write_sensor(sd, MT9M111_CP_OPERATING_MODE_CTL, data, 2);
+
+        PDEBUG(D_V4L2, "Set auto white balance %d", val);
+        return err;
+}
+
+static int mt9m111_get_auto_white_balance(struct gspca_dev *gspca_dev,
+                                          __s32 *val) {
+        struct sd *sd = (struct sd *) gspca_dev;
+        s32 *sensor_settings = sd->sensor_priv;
+
+        *val = sensor_settings[AUTO_WHITE_BALANCE_IDX];
+        PDEBUG(D_V4L2, "Read auto white balance %d", *val);
+        return 0;
+}
+
 static int mt9m111_set_gain(struct gspca_dev *gspca_dev, __s32 val)
 {
         int err, tmp;