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[media] gspca - ov534: Add Hue control

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Signed-off-by: Antonio Ospite <ospite@studenti.unina.it>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Antonio Ospite 2012-05-14 08:07:45 -03:00 committed by Mauro Carvalho Chehab
parent c8e1fb4a67
commit e89fca923f
1 changed files with 63 additions and 2 deletions
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65
drivers/media/video/gspca/ov534.c
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@ -34,6 +34,8 @@
#include "gspca.h"
#include <linux/fixp-arith.h>
#define OV534_REG_ADDRESS 0xf1 /* sensor address */
#define OV534_REG_SUBADDR 0xf2
#define OV534_REG_WRITE 0xf3
@ -53,6 +55,7 @@ MODULE_LICENSE("GPL");
/* controls */
enum e_ctrl {
HUE,
SATURATION,
BRIGHTNESS,
CONTRAST,
@ -87,6 +90,7 @@ enum sensors {
};
/* V4L2 controls supported by the driver */
static void sethue(struct gspca_dev *gspca_dev);
static void setsaturation(struct gspca_dev *gspca_dev);
static void setbrightness(struct gspca_dev *gspca_dev);
static void setcontrast(struct gspca_dev *gspca_dev);
@ -103,6 +107,18 @@ static int sd_start(struct gspca_dev *gspca_dev);
static void sd_stopN(struct gspca_dev *gspca_dev);
static const struct ctrl sd_ctrls[] = {
[HUE] = {
{
.id = V4L2_CID_HUE,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Hue",
.minimum = -90,
.maximum = 90,
.step = 1,
.default_value = 0,
},
.set_control = sethue
},
[SATURATION] = {
{
.id = V4L2_CID_SATURATION,
@ -684,7 +700,7 @@ static const u8 sensor_init_772x[][2] = {
{ 0x9c, 0x20 },
{ 0x9e, 0x81 },
{ 0xa6, 0x06 },
{ 0xa6, 0x07 },
{ 0x7e, 0x0c },
{ 0x7f, 0x16 },
{ 0x80, 0x2a },
@ -955,6 +971,48 @@ static void set_frame_rate(struct gspca_dev *gspca_dev)
PDEBUG(D_PROBE, "frame_rate: %d", r->fps);
}
static void sethue(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
int val;
val = sd->ctrls[HUE].val;
if (sd->sensor == SENSOR_OV767x) {
/* TBD */
} else {
s16 huesin;
s16 huecos;
/* fixp_sin and fixp_cos accept only positive values, while
* our val is between -90 and 90
*/
val += 360;
/* According to the datasheet the registers expect HUESIN and
* HUECOS to be the result of the trigonometric functions,
* scaled by 0x80.
*
* The 0x100 here represents the maximun absolute value
* returned byt fixp_sin and fixp_cos, so the scaling will
* consider the result like in the interval [-1.0, 1.0].
*/
huesin = fixp_sin(val) * 0x80 / 0x100;
huecos = fixp_cos(val) * 0x80 / 0x100;
if (huesin < 0) {
sccb_reg_write(gspca_dev, 0xab,
sccb_reg_read(gspca_dev, 0xab) | 0x2);
huesin = -huesin;
} else {
sccb_reg_write(gspca_dev, 0xab,
sccb_reg_read(gspca_dev, 0xab) & ~0x2);
}
sccb_reg_write(gspca_dev, 0xa9, (u8)huecos);
sccb_reg_write(gspca_dev, 0xaa, (u8)huesin);
}
}
static void setsaturation(struct gspca_dev *gspca_dev)
{
struct sd *sd = (struct sd *) gspca_dev;
@ -1231,7 +1289,8 @@ static int sd_init(struct gspca_dev *gspca_dev)
if ((sensor_id & 0xfff0) == 0x7670) {
sd->sensor = SENSOR_OV767x;
gspca_dev->ctrl_dis = (1 << GAIN) |
gspca_dev->ctrl_dis = (1 << HUE) |
(1 << GAIN) |
(1 << AGC) |
(1 << SHARPNESS); /* auto */
sd->ctrls[SATURATION].min = 0,
@ -1310,6 +1369,8 @@ static int sd_start(struct gspca_dev *gspca_dev)
set_frame_rate(gspca_dev);
if (!(gspca_dev->ctrl_dis & (1 << HUE)))
sethue(gspca_dev);
setsaturation(gspca_dev);
if (!(gspca_dev->ctrl_dis & (1 << AGC)))
setagc(gspca_dev);