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[media] mt9t031: convert to the control framework 

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
[g.liakhovetski@gmx.de: simplified pointer arithmetic]
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2011-09-07 06:08:51 -03:00 committed by Mauro Carvalho Chehab
parent af8425c54b
commit 41efcd7a68
1 changed files with 86 additions and 166 deletions
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252
drivers/media/video/mt9t031.c
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@ -19,6 +19,7 @@
#include <media/soc_mediabus.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-subdev.h>
#include <media/v4l2-ctrls.h>
/*
* mt9t031 i2c address 0x5d
@ -60,14 +61,18 @@
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 int total_h;
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)
@ -175,69 +180,6 @@ static int mt9t031_s_stream(struct v4l2_subdev *sd, int enable)
return 0;
}
enum {
MT9T031_CTRL_VFLIP,
MT9T031_CTRL_HFLIP,
MT9T031_CTRL_GAIN,
MT9T031_CTRL_EXPOSURE,
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 = {
.controls = mt9t031_controls,
.num_controls = ARRAY_SIZE(mt9t031_controls),
};
/* target must be _even_ */
static u16 mt9t031_skip(s32 *source, s32 target, s32 max)
{
@ -334,17 +276,10 @@ 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) {
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;
}
if (ret >= 0 && v4l2_ctrl_g_ctrl(mt9t031->autoexposure) == V4L2_EXPOSURE_AUTO) {
mt9t031->total_h = rect->height + mt9t031->y_skip_top + vblank;
ret = set_shutter(client, mt9t031->total_h);
}
/* Re-enable register update, commit all changes */
@ -513,71 +448,57 @@ static int mt9t031_s_register(struct v4l2_subdev *sd,
}
#endif
static int mt9t031_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
static int mt9t031_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct mt9t031 *mt9t031 = to_mt9t031(client);
int data;
struct mt9t031 *mt9t031 = container_of(ctrl->handler,
struct mt9t031, hdl);
const u32 shutter_max = MT9T031_MAX_HEIGHT + MT9T031_VERTICAL_BLANK;
s32 min, max;
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;
min = mt9t031->exposure->minimum;
max = mt9t031->exposure->maximum;
mt9t031->exposure->val =
(shutter_max / 2 + (mt9t031->total_h - 1) * (max - min))
/ shutter_max + min;
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 mt9t031 *mt9t031 = container_of(ctrl->handler,
struct mt9t031, hdl);
struct v4l2_subdev *sd = &mt9t031->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);
@ -586,9 +507,9 @@ 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 */
@ -605,19 +526,13 @@ 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:
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);
@ -625,27 +540,15 @@ 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) {
} else {
const u16 vblank = MT9T031_VERTICAL_BLANK;
const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank;
unsigned int total_h = mt9t031->rect.height +
mt9t031->total_h = mt9t031->rect.height +
mt9t031->y_skip_top + vblank;
if (set_shutter(client, total_h) < 0)
if (set_shutter(client, mt9t031->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;
}
return 0;
default:
return -EINVAL;
}
@ -735,15 +638,12 @@ 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;
}
@ -757,9 +657,12 @@ static int mt9t031_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
return 0;
}
static const struct v4l2_ctrl_ops mt9t031_ctrl_ops = {
.g_volatile_ctrl = mt9t031_g_volatile_ctrl,
.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,
@ -844,8 +747,6 @@ static int mt9t031_probe(struct i2c_client *client,
dev_err(&client->dev, "MT9T031 driver needs platform data\n");
return -EINVAL;
}
icd->ops = &mt9t031_ops;
}
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
@ -859,6 +760,33 @@ 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_auto_cluster(2, &mt9t031->autoexposure,
V4L2_EXPOSURE_MANUAL, true);
mt9t031->y_skip_top = 0;
mt9t031->rect.left = MT9T031_COLUMN_SKIP;
@ -866,12 +794,6 @@ 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;
@ -882,8 +804,7 @@ static int mt9t031_probe(struct i2c_client *client,
mt9t031_disable(client);
if (ret) {
if (icd)
icd->ops = NULL;
v4l2_ctrl_handler_free(&mt9t031->hdl);
kfree(mt9t031);
}
@ -893,10 +814,9 @@ static int mt9t031_probe(struct i2c_client *client,
static int mt9t031_remove(struct i2c_client *client)
{
struct mt9t031 *mt9t031 = to_mt9t031(client);
struct soc_camera_device *icd = client->dev.platform_data;
if (icd)
icd->ops = NULL;
v4l2_device_unregister_subdev(&mt9t031->subdev);
v4l2_ctrl_handler_free(&mt9t031->hdl);
kfree(mt9t031);
return 0;