The driver now supports automatic/manual gain, automatic/manual white
balance, automatic/manual exposure control, vertical flip, brightness
control, contrast control and saturation control. Additionally the
following effects are available now: rotating the hue in the colorspace,
gray scale image and solarize effect.
Signed-off-by: Bastian Hecht <hec...@gmail.com>
---
INCOMPLETE: There are some missing defines in videodev2.h that are
discussed currently. If something like V4L2_CID_{RED,BLUE}_GAIN is added
to them, my current V4L2_CID_{RED,BLUE}_BALANCE will become
V4L2_CID_{RED,BLUE}_GAIN and OV5642_CONTROL_{RED,BLUE}_SATURATION will
become V4L2_CID_{RED,BLUE}_BALANCE. The remaining code is complete.
diff --git a/drivers/media/video/ov5642.c b/drivers/media/video/ov5642.c
index 41b3f51..56459f2 100644
--- a/drivers/media/video/ov5642.c
+++ b/drivers/media/video/ov5642.c
@@ -30,6 +30,18 @@
#define REG_CHIP_ID_HIGH 0x300a
#define REG_CHIP_ID_LOW 0x300b
+#define REG_RED_GAIN_HIGH 0x3400
+#define REG_RED_GAIN_LOW 0x3401
+#define REG_BLUE_GAIN_HIGH 0x3404
+#define REG_BLUE_GAIN_LOW 0x3405
+#define REG_AWB_MANUAL 0x3406
+#define REG_EXP_HIGH 0x3500
+#define REG_EXP_MIDDLE 0x3501
+#define REG_EXP_LOW 0x3502
+#define REG_EXP_GAIN_CTRL 0x3503
+#define REG_GAIN 0x350b
+#define REG_EXTEND_FRAME_TIME_HIGH 0x350c
+#define REG_EXTEND_FRAME_TIME_LOW 0x350d
#define REG_WINDOW_START_X_HIGH 0x3800
#define REG_WINDOW_START_X_LOW 0x3801
#define REG_WINDOW_START_Y_HIGH 0x3802
@@ -46,13 +58,54 @@
#define REG_OUT_TOTAL_WIDTH_LOW 0x380d
#define REG_OUT_TOTAL_HEIGHT_HIGH 0x380e
#define REG_OUT_TOTAL_HEIGHT_LOW 0x380f
+#define REG_FLIP_SUBSAMPLE 0x3818
#define REG_OUTPUT_FORMAT 0x4300
#define REG_ISP_CTRL_01 0x5001
+#define REG_DIGITAL_EFFECTS 0x5580
+#define REG_HUE_COS 0x5581
+#define REG_HUE_SIN 0x5582
+#define REG_BLUE_SATURATION 0x5583
+#define REG_RED_SATURATION 0x5584
+#define REG_CONTRAST 0x5588
+#define REG_BRIGHTNESS 0x5589
+#define REG_D_E_AUXILLARY 0x558a
#define REG_AVG_WINDOW_END_X_HIGH 0x5682
#define REG_AVG_WINDOW_END_X_LOW 0x5683
#define REG_AVG_WINDOW_END_Y_HIGH 0x5686
#define REG_AVG_WINDOW_END_Y_LOW 0x5687
+/* default register initialisation */
+#define REG_EXP_GAIN_INIT 0x00
+#define REG_FLIP_SUBSAMPLE_INIT 0xc1
+#define REG_DIGITAL_EFFECTS_INIT 0x06
+#define REG_D_E_AUXILLARY_INIT 0x01
+
+/* default values in native space */
+#define DEFAULT_RBBALANCE 0x400
+#define DEFAULT_CONTRAST 0x20
+#define DEFAULT_SATURATION 0x40
+
+#define MAX_EXP_NATIVE 0x01ffff
+#define MAX_GAIN_NATIVE 0x1f
+#define MAX_RBBALANCE_NATIVE 0x0fff
+#define MAX_EXP 0xffff
+#define MAX_GAIN 0xff
+#define MAX_RBBALANCE 0xff
+#define MAX_HUE_TRIG_NATIVE 0x80
+
+#define OV5642_CONTROL_BLUE_SATURATION (V4L2_CID_PRIVATE_BASE + 0)
+#define OV5642_CONTROL_RED_SATURATION (V4L2_CID_PRIVATE_BASE + 1)
+
+#define EXP_V4L2_TO_NATIVE(x) ((x) << 4)
+#define EXP_NATIVE_TO_V4L2(x) ((x) >> 4)
+#define GAIN_V4L2_TO_NATIVE(x) ((x) * MAX_GAIN_NATIVE / MAX_GAIN)
+#define GAIN_NATIVE_TO_V4L2(x) ((x) * MAX_GAIN / MAX_GAIN_NATIVE)
+#define RBBALANCE_V4L2_TO_NATIVE(x) ((x) * MAX_RBBALANCE_NATIVE /
MAX_RBBALANCE)
+#define RBBALANCE_NATIVE_TO_V4L2(x) ((x) * MAX_RBBALANCE /
MAX_RBBALANCE_NATIVE)
+
+/* flaw in the datasheet. we need some extra lines */
+#define MANUAL_LONG_EXP_SAFETY_DISTANCE 20
+
/* active pixel array size */
#define OV5642_SENSOR_SIZE_X 2592
#define OV5642_SENSOR_SIZE_Y 1944
@@ -85,6 +138,9 @@
*/
#define BLANKING_MIN_HEIGHT 1000
+static int ov5642_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl);
+static int ov5642_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl);
+
struct regval_list {
u16 reg_num;
u8 value;
@@ -132,10 +188,8 @@ static struct regval_list ov5642_default_regs_init[] = {
{ 0x471d, 0x5 },
{ 0x4708, 0x6 },
{ 0x370c, 0xa0 },
- { 0x5687, 0x94 },
{ 0x501f, 0x0 },
{ 0x5000, 0x4f },
- { 0x5001, 0xcf },
{ 0x4300, 0x30 },
{ 0x4300, 0x30 },
{ 0x460b, 0x35 },
@@ -148,11 +202,8 @@ static struct regval_list ov5642_default_regs_init[] = {
{ 0x4402, 0x90 },
{ 0x460c, 0x22 },
{ 0x3815, 0x44 },
- { 0x3503, 0x7 },
{ 0x3501, 0x73 },
{ 0x3502, 0x80 },
- { 0x350b, 0x0 },
- { 0x3818, 0xc8 },
{ 0x3824, 0x11 },
{ 0x3a00, 0x78 },
{ 0x3a1a, 0x4 },
@@ -167,12 +218,6 @@ static struct regval_list ov5642_default_regs_init[] = {
{ 0x350d, 0xd0 },
{ 0x3a0d, 0x8 },
{ 0x3a0e, 0x6 },
- { 0x3500, 0x0 },
- { 0x3501, 0x0 },
- { 0x3502, 0x0 },
- { 0x350a, 0x0 },
- { 0x350b, 0x0 },
- { 0x3503, 0x0 },
{ 0x3a0f, 0x3c },
{ 0x3a10, 0x32 },
{ 0x3a1b, 0x3c },
@@ -325,7 +370,7 @@ static struct regval_list ov5642_default_regs_init[] = {
{ 0x54b7, 0xdf },
{ 0x5402, 0x3f },
{ 0x5403, 0x0 },
- { 0x3406, 0x0 },
+ { REG_AWB_MANUAL, 0x0 },
{ 0x5180, 0xff },
{ 0x5181, 0x52 },
{ 0x5182, 0x11 },
@@ -542,7 +587,6 @@ static struct regval_list ov5642_default_regs_init[] = {
{ 0x5088, 0x0 },
{ 0x5089, 0x0 },
{ 0x302b, 0x0 },
- { 0x3503, 0x7 },
{ 0x3011, 0x8 },
{ 0x350c, 0x2 },
{ 0x350d, 0xe4 },
@@ -553,7 +597,6 @@ static struct regval_list ov5642_default_regs_init[] = {
static struct regval_list ov5642_default_regs_finalise[] = {
{ 0x3810, 0xc2 },
- { 0x3818, 0xc9 },
{ 0x381c, 0x10 },
{ 0x381d, 0xa0 },
{ 0x381e, 0x5 },
@@ -568,23 +611,20 @@ static struct regval_list ov5642_default_regs_finalise[]
= {
{ 0x3a0d, 0x2 },
{ 0x3a0e, 0x1 },
{ 0x401c, 0x4 },
- { 0x5682, 0x5 },
- { 0x5683, 0x0 },
- { 0x5686, 0x2 },
- { 0x5687, 0xcc },
- { 0x5001, 0x4f },
+ { REG_ISP_CTRL_01, 0xff },
+ { REG_DIGITAL_EFFECTS, REG_DIGITAL_EFFECTS_INIT },
{ 0x589b, 0x6 },
{ 0x589a, 0xc5 },
- { 0x3503, 0x0 },
+ { REG_EXP_GAIN_CTRL, REG_EXP_GAIN_INIT },
{ 0x460c, 0x20 },
{ 0x460b, 0x37 },
{ 0x471c, 0xd0 },
{ 0x471d, 0x5 },
{ 0x3815, 0x1 },
- { 0x3818, 0xc1 },
+ { REG_FLIP_SUBSAMPLE, REG_FLIP_SUBSAMPLE_INIT },
{ 0x501f, 0x0 },
{ 0x5002, 0xe0 },
- { 0x4300, 0x32 }, /* UYVY */
+ { REG_OUTPUT_FORMAT, 0x32 },
{ 0x3002, 0x1c },
{ 0x4800, 0x14 },
{ 0x4801, 0xf },
@@ -600,6 +640,145 @@ static struct regval_list ov5642_default_regs_finalise[]
= {
{ 0xffff, 0xff },
};
+static const struct v4l2_queryctrl ov5642_controls[] = {
+ {
+ .id = V4L2_CID_AUTOGAIN,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Automatic Gain Control",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 1,
+ .default_value = 1,
+ },
+ {
+ .id = V4L2_CID_GAIN,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Gain",
+ .minimum = 0,
+ .maximum = MAX_GAIN,
+ .step = 1,
+ .default_value = 0,
+ },
+ {
+ .id = V4L2_CID_AUTO_WHITE_BALANCE,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Automatic White Balance",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 1,
+ .default_value = 1,
+ },
+ {
+ .id = V4L2_CID_BLUE_BALANCE,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Blue Balance",
+ .minimum = 0,
+ .maximum = MAX_RBBALANCE,
+ .step = 1,
+ .default_value = DEFAULT_RBBALANCE,
+ },
+ {
+ .id = V4L2_CID_RED_BALANCE,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Red Balance",
+ .minimum = 0,
+ .maximum = MAX_RBBALANCE,
+ .step = 1,
+ .default_value = DEFAULT_RBBALANCE,
+ },
+ {
+ .id = V4L2_CID_EXPOSURE_AUTO,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Automatic Exposure Control",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 1,
+ .default_value = V4L2_EXPOSURE_AUTO,
+ },
+ {
+ .id = V4L2_CID_EXPOSURE,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Exposure",
+ .minimum = 0,
+ .maximum = MAX_EXP,
+ .step = 1,
+ .default_value = 0,
+ },
+ /* vflip works out of the box. hflip doesn't work. */
+ {
+ .id = V4L2_CID_VFLIP,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Flip Vertically",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 1,
+ .default_value = 0,
+ },
+ {
+ .id = V4L2_CID_BRIGHTNESS,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Brightness",
+ .minimum = 0,
+ .maximum = 255,
+ .step = 1,
+ .default_value = 0,
+ },
+ {
+ .id = V4L2_CID_CONTRAST,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Contrast",
+ .minimum = 0,
+ .maximum = 255,
+ .step = 1,
+ .default_value = DEFAULT_CONTRAST,
+ },
+ {
+ .id = OV5642_CONTROL_BLUE_SATURATION,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Blue Saturation",
+ .minimum = 0,
+ .maximum = 255,
+ .step = 1,
+ .default_value = DEFAULT_SATURATION,
+ },
+ {
+ .id = OV5642_CONTROL_RED_SATURATION,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Red Saturation",
+ .minimum = 0,
+ .maximum = 255,
+ .step = 1,
+ .default_value = DEFAULT_SATURATION,
+ },
+ {
+ .id = V4L2_CID_HUE,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Hue",
+ .minimum = -180,
+ .maximum = 175,
+ .step = 5,
+ .default_value = 0,
+ },
+ {
+ .id = V4L2_CID_COLORFX,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Effects - Solarize",
+ .minimum = 0,
+ .maximum = 10,
+ .step = 10,
+ .default_value = 0,
+ },
+ {
+ .id = V4L2_CID_COLOR_KILLER,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Gray Scale Image",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 1,
+ .default_value = 0,
+ },
+};
+
struct ov5642_datafmt {
enum v4l2_mbus_pixelcode code;
enum v4l2_colorspace colorspace;
@@ -613,6 +792,31 @@ struct ov5642 {
/* blanking information */
int total_width;
int total_height;
+
+ /* controls */
+ bool agc;
+ bool awb;
+ bool aec;
+ bool vflip;
+ bool grayscale;
+
+ /* values in v4l2 space */
+ int gain;
+ int blue_balance;
+ int red_balance;
+ int blue_saturation;
+ int red_saturation;
+ int exposure;
+ int brightness;
+ int contrast;
+ int hue;
+ int effects; /* only used for solarize */
+
+ /* cached register values */
+ int reg_exp_gain;
+ int reg_flip_subsample;
+ int reg_digital_effects;
+ int reg_d_e_auxillary;
};
static const struct ov5642_datafmt ov5642_colour_fmts[] = {
@@ -659,6 +863,27 @@ static int reg_read(struct i2c_client *client, u16 reg, u8
*val)
return 0;
}
+/*
+ * convenience function to read 16 bit register values that are split up
+ * into two consecutive high and low parts
+ */
+static int reg_read16(struct i2c_client *client, u16 reg, u16 *val16)
+{
+ int ret;
+ u8 val8;
+
+ ret = reg_read(client, reg, &val8);
+ if (ret)
+ return ret;
+ *val16 = val8 << 8;
+ ret = reg_read(client, reg + 1, &val8);
+ if (ret)
+ return ret;
+ *val16 |= val8;
+
+ return 0;
+}
+
static int reg_write(struct i2c_client *client, u16 reg, u8 val)
{
int ret;
@@ -775,6 +1000,11 @@ static int ov5642_set_resolution(struct v4l2_subdev *sd)
if (!ret)
ret = reg_write16(client, REG_OUT_TOTAL_HEIGHT_HIGH,
total_height);
+ /* set the maximum integration time */
+ if (!ret)
+ ret = reg_write16(client, REG_EXTEND_FRAME_TIME_HIGH,
+ total_height);
+
/* Sets the window for AWB calculations */
if (!ret)
ret = reg_write16(client, REG_AVG_WINDOW_END_X_HIGH, width);
@@ -784,6 +1014,100 @@ static int ov5642_set_resolution(struct v4l2_subdev *sd)
return ret;
}
+static int ov5642_restore_state(struct v4l2_subdev *sd)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct ov5642 *priv = to_ov5642(client);
+ struct v4l2_control set_ctrl;
+ int tmp_red_balance = priv->red_balance;
+ int tmp_blue_balance = priv->blue_balance;
+ int tmp_gain = priv->gain;
+ int tmp_exp = priv->exposure;
+ int ret;
+
+ set_ctrl.id = V4L2_CID_AUTOGAIN;
+ set_ctrl.value = priv->agc;
+ ret = ov5642_s_ctrl(sd, &set_ctrl);
+
+ if (!priv->agc) {
+ set_ctrl.id = V4L2_CID_GAIN;
+ set_ctrl.value = tmp_gain;
+ if (!ret)
+ ret = ov5642_s_ctrl(sd, &set_ctrl);
+ }
+
+ set_ctrl.id = V4L2_CID_AUTO_WHITE_BALANCE;
+ set_ctrl.value = priv->awb;
+ if (!ret)
+ ret = ov5642_s_ctrl(sd, &set_ctrl);
+
+ if (!priv->awb) {
+ set_ctrl.id = V4L2_CID_RED_BALANCE;
+ set_ctrl.value = tmp_red_balance;
+ if (!ret)
+ ret = ov5642_s_ctrl(sd, &set_ctrl);
+
+ set_ctrl.id = V4L2_CID_BLUE_BALANCE;
+ set_ctrl.value = tmp_blue_balance;
+ if (!ret)
+ ret = ov5642_s_ctrl(sd, &set_ctrl);
+ }
+
+ set_ctrl.id = V4L2_CID_EXPOSURE_AUTO;
+ set_ctrl.value = priv->aec;
+ if (!ret)
+ ret = ov5642_s_ctrl(sd, &set_ctrl);
+
+ if (priv->aec == V4L2_EXPOSURE_MANUAL) {
+ set_ctrl.id = V4L2_CID_EXPOSURE;
+ set_ctrl.value = tmp_exp;
+ if (!ret)
+ ret = ov5642_s_ctrl(sd, &set_ctrl);
+ }
+
+ set_ctrl.id = V4L2_CID_VFLIP;
+ set_ctrl.value = priv->vflip;
+ if (!ret)
+ ret = ov5642_s_ctrl(sd, &set_ctrl);
+
+ set_ctrl.id = V4L2_CID_COLOR_KILLER;
+ set_ctrl.value = priv->grayscale;
+ if (!ret)
+ ret = ov5642_s_ctrl(sd, &set_ctrl);
+
+ set_ctrl.id = V4L2_CID_COLORFX;
+ set_ctrl.value = priv->effects;
+ if (!ret)
+ ret = ov5642_s_ctrl(sd, &set_ctrl);
+
+ set_ctrl.id = OV5642_CONTROL_BLUE_SATURATION;
+ set_ctrl.value = priv->blue_saturation;
+ if (!ret)
+ ret = ov5642_s_ctrl(sd, &set_ctrl);
+
+ set_ctrl.id = OV5642_CONTROL_RED_SATURATION;
+ set_ctrl.value = priv->red_saturation;
+ if (!ret)
+ ret = ov5642_s_ctrl(sd, &set_ctrl);
+
+ set_ctrl.id = V4L2_CID_BRIGHTNESS;
+ set_ctrl.value = priv->brightness;
+ if (!ret)
+ ret = ov5642_s_ctrl(sd, &set_ctrl);
+
+ set_ctrl.id = V4L2_CID_CONTRAST;
+ set_ctrl.value = priv->contrast;
+ if (!ret)
+ ret = ov5642_s_ctrl(sd, &set_ctrl);
+
+ set_ctrl.id = V4L2_CID_HUE;
+ set_ctrl.value = priv->hue;
+ if (!ret)
+ ret = ov5642_s_ctrl(sd, &set_ctrl);
+
+ return ret;
+}
+
static int ov5642_try_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
@@ -889,6 +1213,392 @@ static int ov5642_s_crop(struct v4l2_subdev *sd, struct
v4l2_crop *a)
if (!ret)
ret = ov5642_write_array(client, ov5642_default_regs_finalise);
+ priv->reg_exp_gain = REG_EXP_GAIN_INIT;
+ priv->reg_flip_subsample = REG_FLIP_SUBSAMPLE_INIT;
+ priv->reg_digital_effects = REG_DIGITAL_EFFECTS_INIT;
+ priv->reg_d_e_auxillary = REG_D_E_AUXILLARY_INIT;
+
+ /* the chip has been reset, so configure it again */
+ if (!ret)
+ ret = ov5642_restore_state(sd);
+ return ret;
+}
+
+/*
+ * Hue needs trigonometric functions. There is a switch on the ov5642 to use
+ * angles directly, but this seems to massively increase saturation as well.
+ *
+ * The following naive approximate trig functions require an argument
+ * carefully limited to -180 <= theta <= 180.
+ *
+ * Taken directly from ov7670.c
+ */
+#define SIN_STEP 5
+static const int ov5642_sin_table[] = {
+ 0, 87, 173, 258, 342, 422,
+ 499, 573, 642, 707, 766, 819,
+ 866, 906, 939, 965, 984, 996,
+ 1000
+};
+
+static int ov5642_sin(int theta)
+{
+ int chs = 1;
+ int sin;
+
+ if (theta < 0) {
+ theta = -theta;
+ chs = -1;
+ }
+ if (theta <= 90)
+ sin = ov5642_sin_table[theta / SIN_STEP];
+ else {
+ theta -= 90;
+ sin = 1000 - ov5642_sin_table[theta / SIN_STEP];
+ }
+ return sin * chs;
+}
+
+static int ov5642_cosine(int theta)
+{
+ theta = 90 - theta;
+ if (theta > 180)
+ theta -= 360;
+ else if (theta < -180)
+ theta += 360;
+ return ov5642_sin(theta);
+}
+
+static int ov5642_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct ov5642 *priv = to_ov5642(client);
+ int ret = 0;
+ u8 val8;
+ u16 val16;
+ u32 val32;
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUTOGAIN:
+ ctrl->value = priv->agc;
+ break;
+ case V4L2_CID_GAIN:
+ if (priv->agc) {
+ ret = reg_read(client, REG_GAIN, &val8);
+ if (ret)
+ break;
+ ctrl->value = GAIN_NATIVE_TO_V4L2(val8);
+ } else {
+ ctrl->value = priv->gain;
+ }
+ break;
+ case V4L2_CID_AUTO_WHITE_BALANCE:
+ ctrl->value = priv->awb;
+ break;
+ case V4L2_CID_BLUE_BALANCE:
+ if (priv->awb) {
+ ret = reg_read16(client, REG_BLUE_GAIN_HIGH, &val16);
+ if (!ret)
+ ctrl->value = RBBALANCE_NATIVE_TO_V4L2(val16);
+ } else {
+ ctrl->value = priv->blue_balance;
+ }
+ break;
+ case V4L2_CID_RED_BALANCE:
+ if (priv->awb) {
+ ret = reg_read16(client, REG_RED_GAIN_HIGH, &val16);
+ if (!ret)
+ ctrl->value = RBBALANCE_NATIVE_TO_V4L2(val16);
+ } else {
+ ctrl->value = priv->red_balance;
+ }
+ break;
+ case V4L2_CID_EXPOSURE_AUTO:
+ ctrl->value = priv->aec;
+ break;
+ case V4L2_CID_EXPOSURE:
+ if (priv->aec == V4L2_EXPOSURE_AUTO) {
+ ret = reg_read(client, REG_EXP_HIGH, &val8);
+ if (ret)
+ break;
+ val32 = val8 << 16;
+ ret = reg_read16(client, REG_EXP_MIDDLE, &val16);
+ if (ret)
+ break;
+ val32 |= val16;
+ ctrl->value = EXP_NATIVE_TO_V4L2(val32);
+ } else {
+ ctrl->value = priv->exposure;
+ }
+ break;
+ case V4L2_CID_VFLIP:
+ ctrl->value = priv->vflip;
+ break;
+ case V4L2_CID_BRIGHTNESS:
+ ctrl->value = priv->brightness;
+ break;
+ case V4L2_CID_CONTRAST:
+ ctrl->value = priv->contrast;
+ break;
+ case OV5642_CONTROL_BLUE_SATURATION:
+ ctrl->value = priv->blue_saturation;
+ break;
+ case OV5642_CONTROL_RED_SATURATION:
+ ctrl->value = priv->red_saturation;
+ break;
+ case V4L2_CID_HUE:
+ ctrl->value = priv->hue;
+ break;
+ case V4L2_CID_COLOR_KILLER:
+ ctrl->value = priv->grayscale;
+ break;
+ case V4L2_CID_COLORFX:
+ ctrl->value = priv->effects;
+ break;
+ };
+
+ return ret;
+}
+
+static int ov5642_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct ov5642 *priv = to_ov5642(client);
+ int ret = 0;
+ u8 val8;
+ u16 val16;
+ u32 val32;
+ int trig;
+ struct v4l2_control aux_ctrl;
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUTOGAIN:
+ if (!ctrl->value) {
+ aux_ctrl.id = V4L2_CID_GAIN;
+ ret = ov5642_g_ctrl(sd, &aux_ctrl);
+ if (ret)
+ break;
+ priv->gain = aux_ctrl.value;
+ }
+ priv->reg_exp_gain = ctrl->value ? priv->reg_exp_gain & ~BIT(1)
+ : priv->reg_exp_gain | BIT(1);
+ ret = reg_write(client, REG_EXP_GAIN_CTRL, priv->reg_exp_gain);
+ if (!ret)
+ priv->agc = ctrl->value;
+ break;
+ case V4L2_CID_GAIN:
+ /* turn auto function off */
+ if (priv->agc) {
+ aux_ctrl.id = V4L2_CID_AUTOGAIN;
+ aux_ctrl.value = false;
+ ret = ov5642_s_ctrl(sd, &aux_ctrl);
+ if (ret)
+ break;
+ }
+
+ val8 = GAIN_V4L2_TO_NATIVE(ctrl->value);
+ ret = reg_write(client, REG_GAIN, val8);
+ if (!ret)
+ priv->gain = ctrl->value;
+ break;
+ case V4L2_CID_AUTO_WHITE_BALANCE:
+ if (!ctrl->value) {
+ aux_ctrl.id = V4L2_CID_BLUE_BALANCE;
+ ret = ov5642_g_ctrl(sd, &aux_ctrl);
+ if (ret)
+ break;
+ priv->blue_balance = aux_ctrl.value;
+ aux_ctrl.id = V4L2_CID_RED_BALANCE;
+ ret = ov5642_g_ctrl(sd, &aux_ctrl);
+ if (ret)
+ break;
+ priv->red_balance = aux_ctrl.value;
+ }
+ ret = reg_write(client, REG_AWB_MANUAL, !ctrl->value);
+ if (!ret)
+ priv->awb = ctrl->value;
+ break;
+ case V4L2_CID_BLUE_BALANCE:
+ case V4L2_CID_RED_BALANCE:
+ /* turn auto function off */
+ if (priv->awb) {
+ aux_ctrl.id = V4L2_CID_AUTO_WHITE_BALANCE;
+ aux_ctrl.value = false;
+ ret = ov5642_s_ctrl(sd, &aux_ctrl);
+ if (ret)
+ break;
+ }
+ val16 = RBBALANCE_V4L2_TO_NATIVE(ctrl->value);
+ if (ctrl->id == V4L2_CID_BLUE_BALANCE) {
+ ret = reg_write16(client, REG_BLUE_GAIN_HIGH, val16);
+ if (!ret)
+ priv->blue_balance = ctrl->value;
+ } else {
+ ret = reg_write16(client, REG_RED_GAIN_HIGH, val16);
+ if (!ret)
+ priv->red_balance = ctrl->value;
+ }
+ break;
+ case V4L2_CID_EXPOSURE_AUTO:
+ if (ctrl->value == V4L2_EXPOSURE_MANUAL) {
+ aux_ctrl.id = V4L2_CID_EXPOSURE;
+ ret = ov5642_g_ctrl(sd, &aux_ctrl);
+ if (ret)
+ break;
+ priv->exposure = aux_ctrl.value;
+ }
+
+ priv->reg_exp_gain = ctrl->value == V4L2_EXPOSURE_MANUAL
+ ? priv->reg_exp_gain | BIT(0) | BIT(2)
+ : priv->reg_exp_gain & ~(BIT(0) |
BIT(2));
+ ret = reg_write(client, REG_EXP_GAIN_CTRL, priv->reg_exp_gain);
+ if (ret)
+ break;
+ priv->aec = ctrl->value;
+ break;
+ case V4L2_CID_EXPOSURE:
+ /*
+ * the exposure time is given in lines, i.e. how much time is
+ * needed to transmit 1 line. The register value is divided by
+ * 16 in the form of xxxx.x.
+ * So the last nibble (0x3502[0:3]) is the time for a fraction
+ * of 1 line: x/16
+ */
+
+ /* turn auto function off */
+ if (priv->aec) {
+ aux_ctrl.id = V4L2_CID_EXPOSURE_AUTO;
+ aux_ctrl.value = V4L2_EXPOSURE_MANUAL;
+ ret = ov5642_s_ctrl(sd, &aux_ctrl);
+ if (ret)
+ break;
+ }
+
+ val32 = EXP_V4L2_TO_NATIVE(ctrl->value);
+
+ /*
+ * if we expose longer than 1 frame, we must lower the fps
+ * by increasing blanking
+ */
+ if (val32 / 16 + MANUAL_LONG_EXP_SAFETY_DISTANCE >
+ priv->total_height) {
+ ret = reg_write16(client, REG_EXTEND_FRAME_TIME_HIGH,
+ val32 / 16 + BLANKING_EXTRA_HEIGHT);
+ if (ret)
+ break;
+ dev_dbg(sd->v4l2_dev->dev,
+ "%s: Increasing vert. blanking. Total height:
%d.\n",
+ __func__, val32 / 16 + BLANKING_EXTRA_HEIGHT);
+ } else if (priv->exposure + MANUAL_LONG_EXP_SAFETY_DISTANCE >
+ priv->total_height) {
+ /*
+ * if we increased blanking in the past, but lowered the
+ * exposure now sufficiently, we can go back to normal
+ * timings
+ */
+ ret = reg_write16(client, REG_EXTEND_FRAME_TIME_HIGH,
+ priv->total_height);
+ if (ret)
+ break;
+ dev_dbg(sd->v4l2_dev->dev,
+ "%s: Resetting to normal frame time\n",
__func__);
+ }
+ ret = reg_write(client, REG_EXP_HIGH, val32 >> 16);
+ if (ret)
+ break;
+ ret = reg_write16(client, REG_EXP_MIDDLE, val32);
+ if (!ret)
+ priv->exposure = ctrl->value;
+ break;
+ case V4L2_CID_VFLIP:
+ priv->reg_flip_subsample = ctrl->value
+ ? priv->reg_flip_subsample | BIT(5)
+ : priv->reg_flip_subsample & ~BIT(5);
+ ret = reg_write(client, REG_FLIP_SUBSAMPLE,
+ priv->reg_flip_subsample);
+ if (!ret)
+ priv->vflip = ctrl->value;
+ break;
+ case V4L2_CID_BRIGHTNESS:
+ ret = reg_write(client, REG_BRIGHTNESS, ctrl->value);
+ if (!ret)
+ priv->brightness = ctrl->value;
+ break;
+ case V4L2_CID_CONTRAST:
+ ret = reg_write(client, REG_CONTRAST, ctrl->value);
+ if (!ret)
+ priv->contrast = ctrl->value;
+ break;
+ case OV5642_CONTROL_BLUE_SATURATION:
+ ret = reg_write(client, REG_BLUE_SATURATION, ctrl->value);
+ if (!ret)
+ priv->blue_saturation = ctrl->value;
+ break;
+ case OV5642_CONTROL_RED_SATURATION:
+ ret = reg_write(client, REG_RED_SATURATION, ctrl->value);
+ if (!ret)
+ priv->red_saturation = ctrl->value;
+ break;
+ case V4L2_CID_HUE:
+ priv->reg_digital_effects = ctrl->value
+ ? priv->reg_digital_effects | BIT(0)
+ : priv->reg_digital_effects & ~BIT(0);
+ ret = reg_write(client, REG_DIGITAL_EFFECTS,
+ priv->reg_digital_effects);
+ if (ret)
+ break;
+
+ if (!ctrl->value) {
+ priv->hue = 0;
+ break;
+ } else {
+ trig = ov5642_sin(ctrl->value) *
+ MAX_HUE_TRIG_NATIVE / 1000;
+ ret = reg_write(client, REG_HUE_SIN, abs(trig));
+ if (ret)
+ break;
+
+ /* determine bits for sine signs */
+ priv->reg_d_e_auxillary = trig < 0
+ ? (priv->reg_d_e_auxillary & ~BIT(0)) | BIT(1)
+ : (priv->reg_d_e_auxillary | BIT(0)) & ~BIT(1);
+
+ trig = ov5642_cosine(ctrl->value) *
+ MAX_HUE_TRIG_NATIVE / 1000;
+ ret = reg_write(client, REG_HUE_COS, abs(trig));
+
+ /* determine bits for cosine signs */
+ priv->reg_d_e_auxillary = trig < 0
+ ? priv->reg_d_e_auxillary | BIT(4) | BIT(5)
+ : priv->reg_d_e_auxillary & ~(BIT(4) | BIT(5));
+
+ ret = reg_write(client, REG_D_E_AUXILLARY,
+ priv->reg_d_e_auxillary);
+ if (ret)
+ break;
+
+ priv->hue = ctrl->value;
+ break;
+ }
+ case V4L2_CID_COLOR_KILLER:
+ priv->reg_digital_effects = ctrl->value
+ ? priv->reg_digital_effects | BIT(5)
+ : priv->reg_digital_effects & ~BIT(5);
+ ret = reg_write(client, REG_DIGITAL_EFFECTS,
+ priv->reg_digital_effects);
+ if (!ret)
+ priv->grayscale = ctrl->value;
+ break;
+ case V4L2_CID_COLORFX:
+ priv->reg_d_e_auxillary = ctrl->value == V4L2_COLORFX_SOLARIZE
+ ? priv->reg_d_e_auxillary | BIT(7)
+ : priv->reg_d_e_auxillary & ~BIT(7);
+ ret = reg_write(client, REG_D_E_AUXILLARY,
+ priv->reg_d_e_auxillary);
+ if (!ret)
+ priv->effects = ctrl->value;
+ break;
+ }
return ret;
}
@@ -933,18 +1643,28 @@ static int ov5642_g_mbus_config(struct v4l2_subdev *sd,
static int ov5642_s_power(struct v4l2_subdev *sd, int on)
{
struct i2c_client *client;
+ struct ov5642 *priv;
int ret;
if (!on)
return 0;
client = v4l2_get_subdevdata(sd);
+ priv = to_ov5642(client);
ret = ov5642_write_array(client, ov5642_default_regs_init);
if (!ret)
ret = ov5642_set_resolution(sd);
if (!ret)
ret = ov5642_write_array(client, ov5642_default_regs_finalise);
+ priv->reg_exp_gain = REG_EXP_GAIN_INIT;
+ priv->reg_flip_subsample = REG_FLIP_SUBSAMPLE_INIT;
+ priv->reg_digital_effects = REG_DIGITAL_EFFECTS_INIT;
+ priv->reg_d_e_auxillary = REG_D_E_AUXILLARY_INIT;
+
+ /* the chip has been reset, so configure it again */
+ if (!ret)
+ ret = ov5642_restore_state(sd);
return ret;
}
@@ -962,6 +1682,8 @@ static struct v4l2_subdev_video_ops
ov5642_subdev_video_ops = {
static struct v4l2_subdev_core_ops ov5642_subdev_core_ops = {
.s_power = ov5642_s_power,
.g_chip_ident = ov5642_g_chip_ident,
+ .g_ctrl = ov5642_g_ctrl,
+ .s_ctrl = ov5642_s_ctrl,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = ov5642_get_register,
.s_register = ov5642_set_register,
@@ -973,6 +1695,11 @@ static struct v4l2_subdev_ops ov5642_subdev_ops = {
.video = &ov5642_subdev_video_ops,
};
+static struct soc_camera_ops soc_ov5642_ops = {
+ .controls = ov5642_controls,
+ .num_controls = ARRAY_SIZE(ov5642_controls),
+};
+
static int ov5642_video_probe(struct soc_camera_device *icd,
struct i2c_client *client)
{
@@ -1026,7 +1753,7 @@ static int ov5642_probe(struct i2c_client *client,
v4l2_i2c_subdev_init(&priv->subdev, client, &ov5642_subdev_ops);
- icd->ops = NULL;
+ icd->ops = &soc_ov5642_ops;
priv->fmt = &ov5642_colour_fmts[0];
priv->crop_rect.width = OV5642_DEFAULT_WIDTH;
@@ -1038,6 +1765,15 @@ static int ov5642_probe(struct i2c_client *client,
priv->total_width = OV5642_DEFAULT_WIDTH + BLANKING_EXTRA_WIDTH;
priv->total_height = BLANKING_MIN_HEIGHT;
+ priv->aec = V4L2_EXPOSURE_AUTO;
+ priv->agc = true;
+ priv->awb = true;
+ priv->blue_balance = RBBALANCE_NATIVE_TO_V4L2(DEFAULT_RBBALANCE);
+ priv->red_balance = RBBALANCE_NATIVE_TO_V4L2(DEFAULT_RBBALANCE);
+ priv->contrast = DEFAULT_CONTRAST;
+ priv->blue_saturation = DEFAULT_SATURATION;
+ priv->red_saturation = DEFAULT_SATURATION;
+
ret = ov5642_video_probe(icd, client);
if (ret < 0)
goto error;
diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index fca24cc..b0c7f78 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -1144,6 +1144,7 @@ enum v4l2_colorfx {
V4L2_COLORFX_GRASS_GREEN = 7,
V4L2_COLORFX_SKIN_WHITEN = 8,
V4L2_COLORFX_VIVID = 9,
+ V4L2_COLORFX_SOLARIZE = 10,
};
#define V4L2_CID_AUTOBRIGHTNESS (V4L2_CID_BASE+32)
#define V4L2_CID_BAND_STOP_FILTER (V4L2_CID_BASE+33)
--
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