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authorErik Andrén <erik.andren@gmail.com>2009-05-03 15:45:48 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2009-06-16 18:20:53 -0300
commit1906d8d17e556510603a9281b4fa960f2d73cc37 (patch)
tree4621b48b80fddbfc08919e7a6a774a45d3d7082b /drivers/media/video/gspca/stv06xx
parent1b844b536794163eb676b71e6e4c033f6d4b6b33 (diff)
V4L/DVB (11693): gspca - stv06xx-vv6410: Add exposure ctrl
Add the possibility to control the exposure on the vv6410 sensor Signed-off-by: Erik Andrén <erik.andren@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/gspca/stv06xx')
-rw-r--r--drivers/media/video/gspca/stv06xx/stv06xx_vv6410.c69
-rw-r--r--drivers/media/video/gspca/stv06xx/stv06xx_vv6410.h4
2 files changed, 72 insertions, 1 deletions
diff --git a/drivers/media/video/gspca/stv06xx/stv06xx_vv6410.c b/drivers/media/video/gspca/stv06xx/stv06xx_vv6410.c
index 69c77c932fc0..f6603a9deab8 100644
--- a/drivers/media/video/gspca/stv06xx/stv06xx_vv6410.c
+++ b/drivers/media/video/gspca/stv06xx/stv06xx_vv6410.c
@@ -84,8 +84,22 @@ static const struct ctrl vv6410_ctrl[] = {
},
.set = vv6410_set_analog_gain,
.get = vv6410_get_analog_gain
+ },
+#define EXPOSURE_IDX 3
+ {
+ {
+ .id = V4L2_CID_EXPOSURE,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "exposure",
+ .minimum = 0,
+ .maximum = 32768,
+ .step = 1,
+ .default_value = 20000
+ },
+ .set = vv6410_set_exposure,
+ .get = vv6410_get_exposure
}
-};
+ };
static int vv6410_probe(struct sd *sd)
{
@@ -121,6 +135,7 @@ static int vv6410_probe(struct sd *sd)
static int vv6410_init(struct sd *sd)
{
int err = 0, i;
+ s32 *sensor_settings = sd->sensor_priv;
for (i = 0; i < ARRAY_SIZE(stv_bridge_init); i++) {
/* if NULL then len contains single value */
@@ -142,6 +157,11 @@ static int vv6410_init(struct sd *sd)
err = stv06xx_write_sensor_bytes(sd, (u8 *) vv6410_sensor_init,
ARRAY_SIZE(vv6410_sensor_init));
+ if (err < 0)
+ return err;
+
+ err = vv6410_set_exposure(&sd->gspca_dev,
+ sensor_settings[EXPOSURE_IDX]);
return (err < 0) ? err : 0;
}
@@ -318,3 +338,50 @@ static int vv6410_set_analog_gain(struct gspca_dev *gspca_dev, __s32 val)
return (err < 0) ? err : 0;
}
+
+static int vv6410_get_exposure(struct gspca_dev *gspca_dev, __s32 *val)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+ s32 *sensor_settings = sd->sensor_priv;
+
+ *val = sensor_settings[EXPOSURE_IDX];
+
+ PDEBUG(D_V4L2, "Read exposure %d", *val);
+
+ return 0;
+}
+
+static int vv6410_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
+{
+ int err;
+ struct sd *sd = (struct sd *) gspca_dev;
+ s32 *sensor_settings = sd->sensor_priv;
+ unsigned int fine, coarse;
+
+ sensor_settings[EXPOSURE_IDX] = val;
+
+ val = (val * val >> 14) + val / 4;
+
+ fine = val % VV6410_CIF_LINELENGTH;
+ coarse = min(512, val / VV6410_CIF_LINELENGTH);
+
+ PDEBUG(D_V4L2, "Set coarse exposure to %d, fine expsure to %d",
+ coarse, fine);
+
+ err = stv06xx_write_sensor(sd, VV6410_FINEH, fine >> 8);
+ if (err < 0)
+ goto out;
+
+ err = stv06xx_write_sensor(sd, VV6410_FINEL, fine & 0xff);
+ if (err < 0)
+ goto out;
+
+ err = stv06xx_write_sensor(sd, VV6410_COARSEH, coarse >> 8);
+ if (err < 0)
+ goto out;
+
+ err = stv06xx_write_sensor(sd, VV6410_COARSEL, coarse & 0xff);
+
+out:
+ return err;
+}
diff --git a/drivers/media/video/gspca/stv06xx/stv06xx_vv6410.h b/drivers/media/video/gspca/stv06xx/stv06xx_vv6410.h
index 95ac55891bd4..809f92264977 100644
--- a/drivers/media/video/gspca/stv06xx/stv06xx_vv6410.h
+++ b/drivers/media/video/gspca/stv06xx/stv06xx_vv6410.h
@@ -173,6 +173,8 @@
#define VV6410_SUBSAMPLE 0x01
#define VV6410_CROP_TO_QVGA 0x02
+#define VV6410_CIF_LINELENGTH 415
+
static int vv6410_probe(struct sd *sd);
static int vv6410_start(struct sd *sd);
static int vv6410_init(struct sd *sd);
@@ -187,6 +189,8 @@ static int vv6410_get_vflip(struct gspca_dev *gspca_dev, __s32 *val);
static int vv6410_set_vflip(struct gspca_dev *gspca_dev, __s32 val);
static int vv6410_get_analog_gain(struct gspca_dev *gspca_dev, __s32 *val);
static int vv6410_set_analog_gain(struct gspca_dev *gspca_dev, __s32 val);
+static int vv6410_get_exposure(struct gspca_dev *gspca_dev, __s32 *val);
+static int vv6410_set_exposure(struct gspca_dev *gspca_dev, __s32 val);
const struct stv06xx_sensor stv06xx_sensor_vv6410 = {
.name = "ST VV6410",