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[media] gspca - zc3xx: Add exposure control for sensor hv7131r 

Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Jean-François Moine 2011-03-22 06:47:56 -03:00 committed by Mauro Carvalho Chehab
parent 7106225a9e
commit 590f216806
1 changed files with 69 additions and 7 deletions
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76
drivers/media/video/gspca/zc3xx.c
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@ -39,6 +39,7 @@ static int force_sensor = -1;
enum e_ctrl {
BRIGHTNESS,
CONTRAST,
EXPOSURE,
GAMMA,
AUTOGAIN,
LIGHTFREQ,
@ -46,6 +47,8 @@ enum e_ctrl {
NCTRLS /* number of controls */
};
#define AUTOGAIN_DEF 1
/* specific webcam descriptor */
struct sd {
struct gspca_dev gspca_dev; /* !! must be the first item */
@ -92,7 +95,8 @@ enum sensors {
/* V4L2 controls supported by the driver */
static void setcontrast(struct gspca_dev *gspca_dev);
static void setautogain(struct gspca_dev *gspca_dev);
static void setexposure(struct gspca_dev *gspca_dev);
static int sd_setautogain(struct gspca_dev *gspca_dev, __s32 val);
static void setlightfreq(struct gspca_dev *gspca_dev);
static void setsharpness(struct gspca_dev *gspca_dev);
@ -121,6 +125,18 @@ static const struct ctrl sd_ctrls[NCTRLS] = {
},
.set_control = setcontrast
},
[EXPOSURE] = {
{
.id = V4L2_CID_EXPOSURE,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Exposure",
.minimum = 0x30d,
.maximum = 0x493e,
.step = 1,
.default_value = 0x927
},
.set_control = setexposure
},
[GAMMA] = {
{
.id = V4L2_CID_GAMMA,
@ -141,9 +157,10 @@ static const struct ctrl sd_ctrls[NCTRLS] = {
.minimum = 0,
.maximum = 1,
.step = 1,
.default_value = 1,
.default_value = AUTOGAIN_DEF,
.flags = V4L2_CTRL_FLAG_UPDATE
},
.set_control = setautogain
.set = sd_setautogain
},
[LIGHTFREQ] = {
{
@ -5926,6 +5943,26 @@ static void setcontrast(struct gspca_dev *gspca_dev)
reg_w(gspca_dev, gr[i], 0x0130 + i); /* gradient */
}
static void getexposure(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
sd->ctrls[EXPOSURE].val = (i2c_read(gspca_dev, 0x25) << 9)
| (i2c_read(gspca_dev, 0x26) << 1)
| (i2c_read(gspca_dev, 0x27) >> 7);
}
static void setexposure(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
int val;
val = sd->ctrls[EXPOSURE].val;
i2c_write(gspca_dev, 0x25, val >> 9, 0x00);
i2c_write(gspca_dev, 0x26, val >> 1, 0x00);
i2c_write(gspca_dev, 0x27, val << 7, 0x00);
}
static void setquality(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
@ -6623,10 +6660,19 @@ static int sd_init(struct gspca_dev *gspca_dev)
sd->ctrls[GAMMA].def = gamma[sd->sensor];
switch (sd->sensor) {
case SENSOR_HV7131R:
break;
case SENSOR_OV7630C:
gspca_dev->ctrl_dis = (1 << LIGHTFREQ);
gspca_dev->ctrl_dis = (1 << LIGHTFREQ) | (1 << EXPOSURE);
break;
default:
gspca_dev->ctrl_dis = (1 << EXPOSURE);
break;
}
#if AUTOGAIN_DEF
if (sd->ctrls[AUTOGAIN].val)
gspca_dev->ctrl_inac = (1 << EXPOSURE);
#endif
/* switch off the led */
reg_w(gspca_dev, 0x01, 0x0000);
@ -6772,9 +6818,8 @@ static int sd_start(struct gspca_dev *gspca_dev)
reg_w(gspca_dev, 0x40, 0x0117);
break;
case SENSOR_HV7131R:
i2c_write(gspca_dev, 0x25, 0x04, 0x00); /* exposure */
i2c_write(gspca_dev, 0x26, 0x93, 0x00);
i2c_write(gspca_dev, 0x27, 0xe0, 0x00);
if (!sd->ctrls[AUTOGAIN].val)
setexposure(gspca_dev);
reg_w(gspca_dev, 0x00, ZC3XX_R1A7_CALCGLOBALMEAN);
break;
case SENSOR_GC0305:
@ -6852,6 +6897,23 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev,
gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
}
static int sd_setautogain(struct gspca_dev *gspca_dev, __s32 val)
{
struct sd *sd = (struct sd *) gspca_dev;
sd->ctrls[AUTOGAIN].val = val;
if (val) {
gspca_dev->ctrl_inac |= (1 << EXPOSURE);
} else {
gspca_dev->ctrl_inac &= ~(1 << EXPOSURE);
if (gspca_dev->streaming)
getexposure(gspca_dev);
}
if (gspca_dev->streaming)
setautogain(gspca_dev);
return gspca_dev->usb_err;
}
static int sd_querymenu(struct gspca_dev *gspca_dev,
struct v4l2_querymenu *menu)
{