Signed-off-by: Antonio Ospite <osp...@studenti.unina.it>
---
Changes since version 1:
- Disabled the HUE control for SENSOR_OV767x
drivers/media/video/gspca/ov534.c | 65 +++++++++++++++++++++++++++++++++++--
1 file changed, 63 insertions(+), 2 deletions(-)
diff --git a/drivers/media/video/gspca/ov534.c
b/drivers/media/video/gspca/ov534.c
index c15cf23..b5acb1e 100644
--- a/drivers/media/video/gspca/ov534.c
+++ b/drivers/media/video/gspca/ov534.c
@@ -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_devSENSOR_OV767x *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);
--
1.7.10
--
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