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V4L/DVB: gspca_tv8532: add gain control

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gspca_tv8532: add gain control

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans de Goede 2010-05-12 06:58:00 -03:00 committed by Mauro Carvalho Chehab
parent 5e027610ea
commit 14bff9b8e7
1 changed files with 55 additions and 0 deletions
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55
drivers/media/video/gspca/tv8532.c
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@ -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,