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| author | Hans de Goede <hdegoede@redhat.com> | 2010-05-12 11:58:00 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-08-02 19:06:05 +0200 |
| commit | 14bff9b8e746cfdb08f852f489a41659ed814c2a (patch) | |
| tree | 842d854805a1989303c38c5da5f8ec48ed10dc55 | |
| parent | V4L/DVB: gspca_tv8532: remove a whole bunch of unnecessary register writes (diff) | |
| download | linux-14bff9b8e746cfdb08f852f489a41659ed814c2a.tar.xz linux-14bff9b8e746cfdb08f852f489a41659ed814c2a.zip | |
V4L/DVB: gspca_tv8532: add gain control
gspca_tv8532: add gain control
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| -rw-r--r-- | drivers/media/video/gspca/tv8532.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/drivers/media/video/gspca/tv8532.c b/drivers/media/video/gspca/tv8532.c index 2316838ebc14..420dde9ef6fa 100644 --- a/drivers/media/video/gspca/tv8532.c +++ b/drivers/media/video/gspca/tv8532.c @@ -31,6 +31,7 @@ struct sd { struct gspca_dev gspca_dev; /* !! must be the first item */ __u16 brightness; + __u16 gain; __u8 packet; }; @@ -38,6 +39,8 @@ struct sd { /* V4L2 controls supported by the driver */ static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val); static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val); +static int sd_setgain(struct gspca_dev *gspca_dev, __s32 val); +static int sd_getgain(struct gspca_dev *gspca_dev, __s32 *val); static const struct ctrl sd_ctrls[] = { { @@ -54,6 +57,20 @@ static const struct ctrl sd_ctrls[] = { .set = sd_setbrightness, .get = sd_getbrightness, }, + { + { + .id = V4L2_CID_GAIN, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Gain", + .minimum = 0, + .maximum = 0x7ff, + .step = 1, +#define GAIN_DEF 0x100 + .default_value = GAIN_DEF, + }, + .set = sd_setgain, + .get = sd_getgain, + }, }; static const struct v4l2_pix_format sif_mode[] = { @@ -92,6 +109,14 @@ static const struct v4l2_pix_format sif_mode[] = { #define R14_AD_ROW_BEGINL 0x14 #define R15_AD_ROWBEGINH 0x15 #define R1C_AD_EXPOSE_TIMEL 0x1c +#define R20_GAIN_G1L 0x20 +#define R21_GAIN_G1H 0x21 +#define R22_GAIN_RL 0x22 +#define R23_GAIN_RH 0x23 +#define R24_GAIN_BL 0x24 +#define R25_GAIN_BH 0x25 +#define R26_GAIN_G2L 0x26 +#define R27_GAIN_G2H 0x27 #define R28_QUANT 0x28 #define R29_LINE 0x29 #define R2C_POLARITY 0x2c @@ -185,6 +210,7 @@ static int sd_config(struct gspca_dev *gspca_dev, cam->nmodes = ARRAY_SIZE(sif_mode); sd->brightness = BRIGHTNESS_DEF; + sd->gain = GAIN_DEF; return 0; } @@ -224,6 +250,16 @@ static void setbrightness(struct gspca_dev *gspca_dev) /* 0x84 */ } +static void setgain(struct gspca_dev *gspca_dev) +{ + struct sd *sd = (struct sd *) gspca_dev; + + reg_w2(gspca_dev, R20_GAIN_G1L, sd->gain); + reg_w2(gspca_dev, R22_GAIN_RL, sd->gain); + reg_w2(gspca_dev, R24_GAIN_BL, sd->gain); + reg_w2(gspca_dev, R26_GAIN_G2L, sd->gain); +} + /* -- start the camera -- */ static int sd_start(struct gspca_dev *gspca_dev) { @@ -254,6 +290,7 @@ static int sd_start(struct gspca_dev *gspca_dev) tv_8532_setReg(gspca_dev); setbrightness(gspca_dev); + setgain(gspca_dev); /************************************************/ reg_w1(gspca_dev, R31_UPD, 0x01); /* update registers */ @@ -320,6 +357,24 @@ static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val) return 0; } +static int sd_setgain(struct gspca_dev *gspca_dev, __s32 val) +{ + struct sd *sd = (struct sd *) gspca_dev; + + sd->gain = val; + if (gspca_dev->streaming) + setgain(gspca_dev); + return 0; +} + +static int sd_getgain(struct gspca_dev *gspca_dev, __s32 *val) +{ + struct sd *sd = (struct sd *) gspca_dev; + + *val = sd->gain; + return 0; +} + /* sub-driver description */ static const struct sd_desc sd_desc = { .name = MODULE_NAME, |