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Commit 14bff9b8 authored by Hans de Goede's avatar Hans de Goede Committed by Mauro Carvalho Chehab
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V4L/DVB: gspca_tv8532: add gain control 



gspca_tv8532: add gain control

Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 5e027610

drivers/media/video/gspca/tv8532.c

+55 −0
Original line number Diff line number Diff line
@@ -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,