diff options
| author | Erik Andrén <erik.andren@gmail.com> | 2009-05-03 22:45:48 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-06-17 01:20:53 +0400 |
| commit | 1906d8d17e556510603a9281b4fa960f2d73cc37 (patch) | |
| tree | 4621b48b80fddbfc08919e7a6a774a45d3d7082b /drivers/media/video/gspca | |
| parent | 1b844b536794163eb676b71e6e4c033f6d4b6b33 (diff) | |
| download | linux-1906d8d17e556510603a9281b4fa960f2d73cc37.tar.xz | |
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')
| -rw-r--r-- | drivers/media/video/gspca/stv06xx/stv06xx_vv6410.c | 69 | ||||
| -rw-r--r-- | drivers/media/video/gspca/stv06xx/stv06xx_vv6410.h | 4 |
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", |