From: Márton Németh <nm127@xxxxxxxxxxx>
Add white balance control to pac7302 driver. All 8 bits seems to be
relevant on Labtec Webcam 2200 (USB ID 093a:2626). The control is
at page 0, register 0xc6.
Signed-off-by: Márton Németh <nm127@xxxxxxxxxxx>
---
diff -upr a/linux/drivers/media/video/gspca/pac7302.c b/linux/drivers/media/video/gspca/pac7302.c
--- a/linux/drivers/media/video/gspca/pac7302.c 2009-11-07 13:29:00.000000000 +0100
+++ b/linux/drivers/media/video/gspca/pac7302.c 2009-11-07 21:25:15.000000000 +0100
@@ -57,6 +57,7 @@
0 | 0x0f..0x20 | setcolors()
0 | 0xa2..0xab | setbrightcont()
0 | 0xc5 | setredbalance()
+ 0 | 0xc6 | setwhitebalance()
0 | 0xc7 | setbluebalance()
0 | 0xdc | setbrightcont(), setcolors()
3 | 0x02 | setexposure()
@@ -80,6 +81,7 @@ struct sd {
unsigned char brightness;
unsigned char contrast;
unsigned char colors;
+ unsigned char white_balance;
unsigned char red_balance;
unsigned char blue_balance;
unsigned char gain;
@@ -101,6 +103,8 @@ static int sd_setcontrast(struct gspca_d
static int sd_getcontrast(struct gspca_dev *gspca_dev, __s32 *val);
static int sd_setcolors(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getcolors(struct gspca_dev *gspca_dev, __s32 *val);
+static int sd_setwhitebalance(struct gspca_dev *gspca_dev, __s32 val);
+static int sd_getwhitebalance(struct gspca_dev *gspca_dev, __s32 *val);
static int sd_setredbalance(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getredbalance(struct gspca_dev *gspca_dev, __s32 *val);
static int sd_setbluebalance(struct gspca_dev *gspca_dev, __s32 val);
@@ -167,6 +171,20 @@ static struct ctrl sd_ctrls[] = {
},
{
{
+ .id = V4L2_CID_WHITE_BALANCE_TEMPERATURE,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "White Balance",
+ .minimum = 0,
+ .maximum = 255,
+ .step = 1,
+#define WHITEBALANCE_DEF 4
+ .default_value = WHITEBALANCE_DEF,
+ },
+ .set = sd_setwhitebalance,
+ .get = sd_getwhitebalance,
+ },
+ {
+ {
.id = V4L2_CID_RED_BALANCE,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Red",
@@ -546,6 +564,7 @@ static int sd_config(struct gspca_dev *g
sd->brightness = BRIGHTNESS_DEF;
sd->contrast = CONTRAST_DEF;
sd->colors = COLOR_DEF;
+ sd->white_balance = WHITEBALANCE_DEF;
sd->red_balance = REDBALANCE_DEF;
sd->blue_balance = BLUEBALANCE_DEF;
sd->gain = GAIN_DEF;
@@ -616,6 +635,21 @@ static int setcolors(struct gspca_dev *g
return ret;
}
+static int setwhitebalance(struct gspca_dev *gspca_dev)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+ int ret;
+
+ ret = reg_w(gspca_dev, 0xff, 0x00); /* page 0 */
+ if (0 <= ret)
+ ret = reg_w(gspca_dev, 0xc6, sd->white_balance);
+
+ if (0 <= ret)
+ ret = reg_w(gspca_dev, 0xdc, 0x01);
+ PDEBUG(D_CONF|D_STREAM, "white_balance: %i", sd->white_balance);
+ return ret;
+}
+
static int setredbalance(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
@@ -727,6 +761,8 @@ static int sd_start(struct gspca_dev *gs
if (0 <= ret)
ret = setcolors(gspca_dev);
if (0 <= ret)
+ ret = setwhitebalance(gspca_dev);
+ if (0 <= ret)
ret = setredbalance(gspca_dev);
if (0 <= ret)
ret = setbluebalance(gspca_dev);
@@ -962,6 +998,27 @@ static int sd_getcolors(struct gspca_dev
return 0;
}
+static int sd_setwhitebalance(struct gspca_dev *gspca_dev, __s32 val)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+ int ret = 0;
+
+ sd->white_balance = val;
+ if (gspca_dev->streaming)
+ ret = setwhitebalance(gspca_dev);
+ if (0 <= ret)
+ ret = 0;
+ return ret;
+}
+
+static int sd_getwhitebalance(struct gspca_dev *gspca_dev, __s32 *val)
+{
+ struct sd *sd = (struct sd *) gspca_dev;
+
+ *val = sd->white_balance;
+ return 0;
+}
+
static int sd_setredbalance(struct gspca_dev *gspca_dev, __s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
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