diff options
author | Antonio Ospite <ospite@studenti.unina.it> | 2012-05-14 08:07:45 -0300 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-05-14 09:48:00 -0300 |
commit | e89fca923f32de26b69bf4cd604f7b960b161551 (patch) | |
tree | ef5424c7d31eb424a86b5776ea9ed8bbd7a411d5 | |
parent | c8e1fb4a67eed95364a50f33f5201a88877c5215 (diff) |
[media] gspca - ov534: Add Hue control
Signed-off-by: Antonio Ospite <ospite@studenti.unina.it>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
-rw-r--r-- | drivers/media/video/gspca/ov534.c | 65 |
1 files changed, 63 insertions, 2 deletions
diff --git a/drivers/media/video/gspca/ov534.c b/drivers/media/video/gspca/ov534.c index c15cf23d775..b5acb1e4b4e 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_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); |