@@ -18,6 +18,7 @@
#include <media/soc_camera.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-subdev.h>
+#include <media/v4l2-ctrls.h>
/*
* mt9t031 i2c address 0x5d
@@ -64,14 +65,17 @@
struct mt9t031 {
struct v4l2_subdev subdev;
+ struct v4l2_ctrl_handler hdl;
+ struct {
+ /* exposure/auto-exposure cluster */
+ struct v4l2_ctrl *autoexposure;
+ struct v4l2_ctrl *exposure;
+ };
struct v4l2_rect rect; /* Sensor window */
int model; /* V4L2_IDENT_MT9T031* codes from v4l2-chip-ident.h */
u16 xskip;
u16 yskip;
- unsigned int gain;
unsigned short y_skip_top; /* Lines to skip at the top */
- unsigned int exposure;
- unsigned char autoexposure;
};
static struct mt9t031 *to_mt9t031(const struct i2c_client *client)
@@ -211,61 +215,9 @@ enum {
MT9T031_CTRL_EXPOSURE_AUTO,
};
-static const struct v4l2_queryctrl mt9t031_controls[] = {
- [MT9T031_CTRL_VFLIP] = {
- .id = V4L2_CID_VFLIP,
- .type = V4L2_CTRL_TYPE_BOOLEAN,
- .name = "Flip Vertically",
- .minimum = 0,
- .maximum = 1,
- .step = 1,
- .default_value = 0,
- },
- [MT9T031_CTRL_HFLIP] = {
- .id = V4L2_CID_HFLIP,
- .type = V4L2_CTRL_TYPE_BOOLEAN,
- .name = "Flip Horizontally",
- .minimum = 0,
- .maximum = 1,
- .step = 1,
- .default_value = 0,
- },
- [MT9T031_CTRL_GAIN] = {
- .id = V4L2_CID_GAIN,
- .type = V4L2_CTRL_TYPE_INTEGER,
- .name = "Gain",
- .minimum = 0,
- .maximum = 127,
- .step = 1,
- .default_value = 64,
- .flags = V4L2_CTRL_FLAG_SLIDER,
- },
- [MT9T031_CTRL_EXPOSURE] = {
- .id = V4L2_CID_EXPOSURE,
- .type = V4L2_CTRL_TYPE_INTEGER,
- .name = "Exposure",
- .minimum = 1,
- .maximum = 255,
- .step = 1,
- .default_value = 255,
- .flags = V4L2_CTRL_FLAG_SLIDER,
- },
- [MT9T031_CTRL_EXPOSURE_AUTO] = {
- .id = V4L2_CID_EXPOSURE_AUTO,
- .type = V4L2_CTRL_TYPE_BOOLEAN,
- .name = "Automatic Exposure",
- .minimum = 0,
- .maximum = 1,
- .step = 1,
- .default_value = 1,
- }
-};
-
static struct soc_camera_ops mt9t031_ops = {
.set_bus_param = mt9t031_set_bus_param,
.query_bus_param = mt9t031_query_bus_param,
- .controls = mt9t031_controls,
- .num_controls = ARRAY_SIZE(mt9t031_controls),
};
/* target must be _even_ */
@@ -364,18 +316,20 @@ static int mt9t031_set_params(struct i2c_client *client,
if (ret >= 0)
ret = reg_write(client, MT9T031_WINDOW_HEIGHT,
rect->height + mt9t031->y_skip_top - 1);
- if (ret >= 0 && mt9t031->autoexposure) {
+ v4l2_ctrl_lock(mt9t031->autoexposure);
+ if (ret >= 0 && mt9t031->autoexposure->cur.val == V4L2_EXPOSURE_AUTO) {
unsigned int total_h = rect->height + mt9t031->y_skip_top + vblank;
ret = set_shutter(client, total_h);
if (ret >= 0) {
const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank;
- const struct v4l2_queryctrl *qctrl =
- &mt9t031_controls[MT9T031_CTRL_EXPOSURE];
- mt9t031->exposure = (shutter_max / 2 + (total_h - 1) *
- (qctrl->maximum - qctrl->minimum)) /
- shutter_max + qctrl->minimum;
+ struct v4l2_ctrl *ctrl = mt9t031->exposure;
+
+ ctrl->cur.val = (shutter_max / 2 + (total_h - 1) *
+ (ctrl->maximum - ctrl->minimum)) /
+ shutter_max + ctrl->minimum;
}
}
+ v4l2_ctrl_unlock(mt9t031->autoexposure);
/* Re-enable register update, commit all changes */
if (ret >= 0)
@@ -543,71 +497,38 @@ static int mt9t031_s_register(struct v4l2_subdev *sd,
}
#endif
-static int mt9t031_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
-{
- struct i2c_client *client = v4l2_get_subdevdata(sd);
- struct mt9t031 *mt9t031 = to_mt9t031(client);
- int data;
-
- switch (ctrl->id) {
- case V4L2_CID_VFLIP:
- data = reg_read(client, MT9T031_READ_MODE_2);
- if (data < 0)
- return -EIO;
- ctrl->value = !!(data & 0x8000);
- break;
- case V4L2_CID_HFLIP:
- data = reg_read(client, MT9T031_READ_MODE_2);
- if (data < 0)
- return -EIO;
- ctrl->value = !!(data & 0x4000);
- break;
- case V4L2_CID_EXPOSURE_AUTO:
- ctrl->value = mt9t031->autoexposure;
- break;
- case V4L2_CID_GAIN:
- ctrl->value = mt9t031->gain;
- break;
- case V4L2_CID_EXPOSURE:
- ctrl->value = mt9t031->exposure;
- break;
- }
- return 0;
-}
-
-static int mt9t031_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+static int mt9t031_s_ctrl(struct v4l2_ctrl *ctrl)
{
+ struct v4l2_subdev *sd =
+ &container_of(ctrl->handler, struct mt9t031, hdl)->subdev;
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct mt9t031 *mt9t031 = to_mt9t031(client);
- const struct v4l2_queryctrl *qctrl;
+ struct v4l2_ctrl *exp = mt9t031->exposure;
int data;
switch (ctrl->id) {
case V4L2_CID_VFLIP:
- if (ctrl->value)
+ if (ctrl->val)
data = reg_set(client, MT9T031_READ_MODE_2, 0x8000);
else
data = reg_clear(client, MT9T031_READ_MODE_2, 0x8000);
if (data < 0)
return -EIO;
- break;
+ return 0;
case V4L2_CID_HFLIP:
- if (ctrl->value)
+ if (ctrl->val)
data = reg_set(client, MT9T031_READ_MODE_2, 0x4000);
else
data = reg_clear(client, MT9T031_READ_MODE_2, 0x4000);
if (data < 0)
return -EIO;
- break;
+ return 0;
case V4L2_CID_GAIN:
- qctrl = &mt9t031_controls[MT9T031_CTRL_GAIN];
- if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
- return -EINVAL;
/* See Datasheet Table 7, Gain settings. */
- if (ctrl->value <= qctrl->default_value) {
+ if (ctrl->val <= ctrl->default_value) {
/* Pack it into 0..1 step 0.125, register values 0..8 */
- unsigned long range = qctrl->default_value - qctrl->minimum;
- data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range;
+ unsigned long range = ctrl->default_value - ctrl->minimum;
+ data = ((ctrl->val - ctrl->minimum) * 8 + range / 2) / range;
dev_dbg(&client->dev, "Setting gain %d\n", data);
data = reg_write(client, MT9T031_GLOBAL_GAIN, data);
@@ -616,9 +537,9 @@ static int mt9t031_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
} else {
/* Pack it into 1.125..128 variable step, register values 9..0x7860 */
/* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */
- unsigned long range = qctrl->maximum - qctrl->default_value - 1;
+ unsigned long range = ctrl->maximum - ctrl->default_value - 1;
/* calculated gain: map 65..127 to 9..1024 step 0.125 */
- unsigned long gain = ((ctrl->value - qctrl->default_value - 1) *
+ unsigned long gain = ((ctrl->val - ctrl->default_value - 1) *
1015 + range / 2) / range + 9;
if (gain <= 32) /* calculated gain 9..32 -> 9..32 */
@@ -635,19 +556,16 @@ static int mt9t031_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
if (data < 0)
return -EIO;
}
+ return 0;
- /* Success */
- mt9t031->gain = ctrl->value;
- break;
- case V4L2_CID_EXPOSURE:
- qctrl = &mt9t031_controls[MT9T031_CTRL_EXPOSURE];
- /* mt9t031 has maximum == default */
- if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
- return -EINVAL;
- else {
- const unsigned long range = qctrl->maximum - qctrl->minimum;
- const u32 shutter = ((ctrl->value - qctrl->minimum) * 1048 +
- range / 2) / range + 1;
+ case V4L2_CID_EXPOSURE_AUTO:
+ /* Force manual exposure if only the exposure was changed */
+ if (!ctrl->has_new)
+ ctrl->val = V4L2_EXPOSURE_MANUAL;
+ if (ctrl->val == V4L2_EXPOSURE_MANUAL) {
+ unsigned int range = exp->maximum - exp->minimum;
+ unsigned int shutter = ((exp->val - exp->minimum) * 1048 +
+ range / 2) / range + 1;
u32 old;
get_shutter(client, &old);
@@ -655,12 +573,8 @@ static int mt9t031_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
old, shutter);
if (set_shutter(client, shutter) < 0)
return -EIO;
- mt9t031->exposure = ctrl->value;
- mt9t031->autoexposure = 0;
- }
- break;
- case V4L2_CID_EXPOSURE_AUTO:
- if (ctrl->value) {
+ ctrl->val = V4L2_EXPOSURE_MANUAL;
+ } else {
const u16 vblank = MT9T031_VERTICAL_BLANK;
const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank;
unsigned int total_h = mt9t031->rect.height +
@@ -668,14 +582,11 @@ static int mt9t031_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
if (set_shutter(client, total_h) < 0)
return -EIO;
- qctrl = &mt9t031_controls[MT9T031_CTRL_EXPOSURE];
- mt9t031->exposure = (shutter_max / 2 + (total_h - 1) *
- (qctrl->maximum - qctrl->minimum)) /
- shutter_max + qctrl->minimum;
- mt9t031->autoexposure = 1;
- } else
- mt9t031->autoexposure = 0;
- break;
+ exp->val = (shutter_max / 2 + (total_h - 1) *
+ (exp->maximum - exp->minimum)) /
+ shutter_max + exp->minimum;
+ }
+ return 0;
default:
return -EINVAL;
}
@@ -766,15 +677,12 @@ static int mt9t031_video_probe(struct i2c_client *client)
dev_info(&client->dev, "Detected a MT9T031 chip ID %x\n", data);
ret = mt9t031_idle(client);
- if (ret < 0)
+ if (ret < 0) {
dev_err(&client->dev, "Failed to initialise the camera\n");
- else
+ } else {
vdev->dev.type = &mt9t031_dev_type;
-
- /* mt9t031_idle() has reset the chip to default. */
- mt9t031->exposure = 255;
- mt9t031->gain = 64;
-
+ v4l2_ctrl_handler_setup(&mt9t031->hdl);
+ }
return ret;
}
@@ -788,9 +696,11 @@ static int mt9t031_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
return 0;
}
+static const struct v4l2_ctrl_ops mt9t031_ctrl_ops = {
+ .s_ctrl = mt9t031_s_ctrl,
+};
+
static struct v4l2_subdev_core_ops mt9t031_subdev_core_ops = {
- .g_ctrl = mt9t031_g_ctrl,
- .s_ctrl = mt9t031_s_ctrl,
.g_chip_ident = mt9t031_g_chip_ident,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = mt9t031_g_register,
@@ -858,6 +768,32 @@ static int mt9t031_probe(struct i2c_client *client,
return -ENOMEM;
v4l2_i2c_subdev_init(&mt9t031->subdev, client, &mt9t031_subdev_ops);
+ v4l2_ctrl_handler_init(&mt9t031->hdl, 5);
+ v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops,
+ V4L2_CID_VFLIP, 0, 1, 1, 0);
+ v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops,
+ V4L2_CID_HFLIP, 0, 1, 1, 0);
+ v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops,
+ V4L2_CID_GAIN, 0, 127, 1, 64);
+
+ /*
+ * Simulated autoexposure. If enabled, we calculate shutter width
+ * ourselves in the driver based on vertical blanking and frame width
+ */
+ mt9t031->autoexposure = v4l2_ctrl_new_std_menu(&mt9t031->hdl,
+ &mt9t031_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
+ V4L2_EXPOSURE_AUTO);
+ mt9t031->exposure = v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops,
+ V4L2_CID_EXPOSURE, 1, 255, 1, 255);
+
+ mt9t031->subdev.ctrl_handler = &mt9t031->hdl;
+ if (mt9t031->hdl.error) {
+ int err = mt9t031->hdl.error;
+
+ kfree(mt9t031);
+ return err;
+ }
+ v4l2_ctrl_cluster(2, &mt9t031->autoexposure);
mt9t031->y_skip_top = 0;
mt9t031->rect.left = MT9T031_COLUMN_SKIP;
@@ -865,12 +801,6 @@ static int mt9t031_probe(struct i2c_client *client,
mt9t031->rect.width = MT9T031_MAX_WIDTH;
mt9t031->rect.height = MT9T031_MAX_HEIGHT;
- /*
- * Simulated autoexposure. If enabled, we calculate shutter width
- * ourselves in the driver based on vertical blanking and frame width
- */
- mt9t031->autoexposure = 1;
-
mt9t031->xskip = 1;
mt9t031->yskip = 1;
@@ -883,6 +813,7 @@ static int mt9t031_probe(struct i2c_client *client,
if (ret) {
if (icd)
icd->ops = NULL;
+ v4l2_ctrl_handler_free(&mt9t031->hdl);
kfree(mt9t031);
}
@@ -894,8 +825,10 @@ static int mt9t031_remove(struct i2c_client *client)
struct mt9t031 *mt9t031 = to_mt9t031(client);
struct soc_camera_device *icd = client->dev.platform_data;
+ v4l2_device_unregister_subdev(&mt9t031->subdev);
if (icd)
icd->ops = NULL;
+ v4l2_ctrl_handler_free(&mt9t031->hdl);
kfree(mt9t031);
return 0;