aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/video/mt9m001.c
diff options
context:
space:
mode:
authorHans Verkuil <hans.verkuil@cisco.com>2011-09-07 06:04:30 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2011-11-03 18:28:52 -0200
commit2dd7d29c783db1efa875e585770feb2cd7aaaf32 (patch)
tree5b8f487fa4cb5eb14df7ae422d6d8099a0741977 /drivers/media/video/mt9m001.c
parent34e181c5211f106f1d464e9bcb50bb88398126e2 (diff)
[media] mt9m001: 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>
Diffstat (limited to 'drivers/media/video/mt9m001.c')
-rw-r--r--drivers/media/video/mt9m001.c218
1 files changed, 77 insertions, 141 deletions
diff --git a/drivers/media/video/mt9m001.c b/drivers/media/video/mt9m001.c
index 3555e853e5c9..42bb3c89cfe6 100644
--- a/drivers/media/video/mt9m001.c
+++ b/drivers/media/video/mt9m001.c
@@ -17,6 +17,7 @@
#include <media/soc_mediabus.h>
#include <media/v4l2-subdev.h>
#include <media/v4l2-chip-ident.h>
+#include <media/v4l2-ctrls.h>
/*
* mt9m001 i2c address 0x5d
@@ -85,15 +86,19 @@ static const struct mt9m001_datafmt mt9m001_monochrome_fmts[] = {
struct mt9m001 {
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 */
const struct mt9m001_datafmt *fmt;
const struct mt9m001_datafmt *fmts;
int num_fmts;
int model; /* V4L2_IDENT_MT9M001* codes from v4l2-chip-ident.h */
- unsigned int gain;
- unsigned int exposure;
+ unsigned int total_h;
unsigned short y_skip_top; /* Lines to skip at the top */
- unsigned char autoexposure;
};
static struct mt9m001 *to_mt9m001(const struct i2c_client *client)
@@ -171,10 +176,8 @@ static int mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct mt9m001 *mt9m001 = to_mt9m001(client);
struct v4l2_rect rect = a->c;
- struct soc_camera_device *icd = client->dev.platform_data;
int ret;
const u16 hblank = 9, vblank = 25;
- unsigned int total_h;
if (mt9m001->fmts == mt9m001_colour_fmts)
/*
@@ -193,7 +196,7 @@ static int mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
soc_camera_limit_side(&rect.top, &rect.height,
MT9M001_ROW_SKIP, MT9M001_MIN_HEIGHT, MT9M001_MAX_HEIGHT);
- total_h = rect.height + mt9m001->y_skip_top + vblank;
+ mt9m001->total_h = rect.height + mt9m001->y_skip_top + vblank;
/* Blanking and start values - default... */
ret = reg_write(client, MT9M001_HORIZONTAL_BLANKING, hblank);
@@ -213,17 +216,8 @@ static int mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
if (!ret)
ret = reg_write(client, MT9M001_WINDOW_HEIGHT,
rect.height + mt9m001->y_skip_top - 1);
- if (!ret && mt9m001->autoexposure) {
- ret = reg_write(client, MT9M001_SHUTTER_WIDTH, total_h);
- if (!ret) {
- const struct v4l2_queryctrl *qctrl =
- soc_camera_find_qctrl(icd->ops,
- V4L2_CID_EXPOSURE);
- mt9m001->exposure = (524 + (total_h - 1) *
- (qctrl->maximum - qctrl->minimum)) /
- 1048 + qctrl->minimum;
- }
- }
+ if (!ret && v4l2_ctrl_g_ctrl(mt9m001->autoexposure) == V4L2_EXPOSURE_AUTO)
+ ret = reg_write(client, MT9M001_SHUTTER_WIDTH, mt9m001->total_h);
if (!ret)
mt9m001->rect = rect;
@@ -383,105 +377,48 @@ static int mt9m001_s_register(struct v4l2_subdev *sd,
}
#endif
-static const struct v4l2_queryctrl mt9m001_controls[] = {
- {
- .id = V4L2_CID_VFLIP,
- .type = V4L2_CTRL_TYPE_BOOLEAN,
- .name = "Flip Vertically",
- .minimum = 0,
- .maximum = 1,
- .step = 1,
- .default_value = 0,
- }, {
- .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,
- }, {
- .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,
- }, {
- .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 mt9m001_ops = {
- .controls = mt9m001_controls,
- .num_controls = ARRAY_SIZE(mt9m001_controls),
-};
-
-static int mt9m001_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+static int mt9m001_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
{
- struct i2c_client *client = v4l2_get_subdevdata(sd);
- struct mt9m001 *mt9m001 = to_mt9m001(client);
- int data;
+ struct mt9m001 *mt9m001 = container_of(ctrl->handler,
+ struct mt9m001, hdl);
+ s32 min, max;
switch (ctrl->id) {
- case V4L2_CID_VFLIP:
- data = reg_read(client, MT9M001_READ_OPTIONS2);
- if (data < 0)
- return -EIO;
- ctrl->value = !!(data & 0x8000);
- break;
case V4L2_CID_EXPOSURE_AUTO:
- ctrl->value = mt9m001->autoexposure;
- break;
- case V4L2_CID_GAIN:
- ctrl->value = mt9m001->gain;
- break;
- case V4L2_CID_EXPOSURE:
- ctrl->value = mt9m001->exposure;
+ min = mt9m001->exposure->minimum;
+ max = mt9m001->exposure->maximum;
+ mt9m001->exposure->val =
+ (524 + (mt9m001->total_h - 1) * (max - min)) / 1048 + min;
break;
}
return 0;
}
-static int mt9m001_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+static int mt9m001_s_ctrl(struct v4l2_ctrl *ctrl)
{
+ struct mt9m001 *mt9m001 = container_of(ctrl->handler,
+ struct mt9m001, hdl);
+ struct v4l2_subdev *sd = &mt9m001->subdev;
struct i2c_client *client = v4l2_get_subdevdata(sd);
- struct mt9m001 *mt9m001 = to_mt9m001(client);
- struct soc_camera_device *icd = client->dev.platform_data;
- const struct v4l2_queryctrl *qctrl;
+ struct v4l2_ctrl *exp = mt9m001->exposure;
int data;
- qctrl = soc_camera_find_qctrl(&mt9m001_ops, ctrl->id);
-
- if (!qctrl)
- return -EINVAL;
-
switch (ctrl->id) {
case V4L2_CID_VFLIP:
- if (ctrl->value)
+ if (ctrl->val)
data = reg_set(client, MT9M001_READ_OPTIONS2, 0x8000);
else
data = reg_clear(client, MT9M001_READ_OPTIONS2, 0x8000);
if (data < 0)
return -EIO;
- break;
+ return 0;
+
case V4L2_CID_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, MT9M001_GLOBAL_GAIN, data);
@@ -490,8 +427,8 @@ static int mt9m001_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
} else {
/* Pack it into 1.125..15 variable step, register values 9..67 */
/* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */
- unsigned long range = qctrl->maximum - qctrl->default_value - 1;
- unsigned long gain = ((ctrl->value - qctrl->default_value - 1) *
+ unsigned long range = ctrl->maximum - ctrl->default_value - 1;
+ unsigned long gain = ((ctrl->val - ctrl->default_value - 1) *
111 + range / 2) / range + 9;
if (gain <= 32)
@@ -507,47 +444,30 @@ static int mt9m001_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
if (data < 0)
return -EIO;
}
+ return 0;
- /* Success */
- mt9m001->gain = ctrl->value;
- break;
- case V4L2_CID_EXPOSURE:
- /* mt9m001 has maximum == default */
- if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
- return -EINVAL;
- else {
- unsigned long range = qctrl->maximum - qctrl->minimum;
- unsigned long shutter = ((ctrl->value - qctrl->minimum) * 1048 +
+ case V4L2_CID_EXPOSURE_AUTO:
+ if (ctrl->val == V4L2_EXPOSURE_MANUAL) {
+ unsigned long range = exp->maximum - exp->minimum;
+ unsigned long shutter = ((exp->val - exp->minimum) * 1048 +
range / 2) / range + 1;
dev_dbg(&client->dev,
"Setting shutter width from %d to %lu\n",
- reg_read(client, MT9M001_SHUTTER_WIDTH),
- shutter);
+ reg_read(client, MT9M001_SHUTTER_WIDTH), shutter);
if (reg_write(client, MT9M001_SHUTTER_WIDTH, shutter) < 0)
return -EIO;
- mt9m001->exposure = ctrl->value;
- mt9m001->autoexposure = 0;
- }
- break;
- case V4L2_CID_EXPOSURE_AUTO:
- if (ctrl->value) {
+ } else {
const u16 vblank = 25;
- unsigned int total_h = mt9m001->rect.height +
+
+ mt9m001->total_h = mt9m001->rect.height +
mt9m001->y_skip_top + vblank;
- if (reg_write(client, MT9M001_SHUTTER_WIDTH,
- total_h) < 0)
+ if (reg_write(client, MT9M001_SHUTTER_WIDTH, mt9m001->total_h) < 0)
return -EIO;
- qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE);
- mt9m001->exposure = (524 + (total_h - 1) *
- (qctrl->maximum - qctrl->minimum)) /
- 1048 + qctrl->minimum;
- mt9m001->autoexposure = 1;
- } else
- mt9m001->autoexposure = 0;
- break;
+ }
+ return 0;
}
- return 0;
+ return -EINVAL;
}
/*
@@ -621,10 +541,7 @@ static int mt9m001_video_probe(struct soc_camera_device *icd,
dev_err(&client->dev, "Failed to initialise the camera\n");
/* mt9m001_init() has reset the chip, returning registers to defaults */
- mt9m001->gain = 64;
- mt9m001->exposure = 255;
-
- return ret;
+ return v4l2_ctrl_handler_setup(&mt9m001->hdl);
}
static void mt9m001_video_remove(struct soc_camera_device *icd)
@@ -647,9 +564,12 @@ static int mt9m001_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
return 0;
}
+static const struct v4l2_ctrl_ops mt9m001_ctrl_ops = {
+ .g_volatile_ctrl = mt9m001_g_volatile_ctrl,
+ .s_ctrl = mt9m001_s_ctrl,
+};
+
static struct v4l2_subdev_core_ops mt9m001_subdev_core_ops = {
- .g_ctrl = mt9m001_g_ctrl,
- .s_ctrl = mt9m001_s_ctrl,
.g_chip_ident = mt9m001_g_chip_ident,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = mt9m001_g_register,
@@ -765,25 +685,40 @@ static int mt9m001_probe(struct i2c_client *client,
return -ENOMEM;
v4l2_i2c_subdev_init(&mt9m001->subdev, client, &mt9m001_subdev_ops);
+ v4l2_ctrl_handler_init(&mt9m001->hdl, 4);
+ v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops,
+ V4L2_CID_VFLIP, 0, 1, 1, 0);
+ v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops,
+ V4L2_CID_GAIN, 0, 127, 1, 64);
+ mt9m001->exposure = v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops,
+ V4L2_CID_EXPOSURE, 1, 255, 1, 255);
+ /*
+ * Simulated autoexposure. If enabled, we calculate shutter width
+ * ourselves in the driver based on vertical blanking and frame width
+ */
+ mt9m001->autoexposure = v4l2_ctrl_new_std_menu(&mt9m001->hdl,
+ &mt9m001_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
+ V4L2_EXPOSURE_AUTO);
+ mt9m001->subdev.ctrl_handler = &mt9m001->hdl;
+ if (mt9m001->hdl.error) {
+ int err = mt9m001->hdl.error;
- /* Second stage probe - when a capture adapter is there */
- icd->ops = &mt9m001_ops;
+ kfree(mt9m001);
+ return err;
+ }
+ v4l2_ctrl_auto_cluster(2, &mt9m001->autoexposure,
+ V4L2_EXPOSURE_MANUAL, true);
+ /* Second stage probe - when a capture adapter is there */
mt9m001->y_skip_top = 0;
mt9m001->rect.left = MT9M001_COLUMN_SKIP;
mt9m001->rect.top = MT9M001_ROW_SKIP;
mt9m001->rect.width = MT9M001_MAX_WIDTH;
mt9m001->rect.height = MT9M001_MAX_HEIGHT;
- /*
- * Simulated autoexposure. If enabled, we calculate shutter width
- * ourselves in the driver based on vertical blanking and frame width
- */
- mt9m001->autoexposure = 1;
-
ret = mt9m001_video_probe(icd, client);
if (ret) {
- icd->ops = NULL;
+ v4l2_ctrl_handler_free(&mt9m001->hdl);
kfree(mt9m001);
}
@@ -795,7 +730,8 @@ static int mt9m001_remove(struct i2c_client *client)
struct mt9m001 *mt9m001 = to_mt9m001(client);
struct soc_camera_device *icd = client->dev.platform_data;
- icd->ops = NULL;
+ v4l2_device_unregister_subdev(&mt9m001->subdev);
+ v4l2_ctrl_handler_free(&mt9m001->hdl);
mt9m001_video_remove(icd);
kfree(mt9m001);

Privacy Policy