forked from Minki/linux
[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>
This commit is contained in:
Hans Verkuil
Mauro Carvalho Chehab
parent
34e181c521
commit
2dd7d29c78
@ -17,6 +17,7 @@
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#include <media/soc_mediabus.h>
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#include <media/v4l2-subdev.h>
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#include <media/v4l2-chip-ident.h>
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#include <media/v4l2-ctrls.h>
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/*
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* mt9m001 i2c address 0x5d
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@ -85,15 +86,19 @@ static const struct mt9m001_datafmt mt9m001_monochrome_fmts[] = {
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struct mt9m001 {
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struct v4l2_subdev subdev;
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struct v4l2_ctrl_handler hdl;
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struct {
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/* exposure/auto-exposure cluster */
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struct v4l2_ctrl *autoexposure;
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struct v4l2_ctrl *exposure;
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};
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struct v4l2_rect rect; /* Sensor window */
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const struct mt9m001_datafmt *fmt;
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const struct mt9m001_datafmt *fmts;
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int num_fmts;
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int model; /* V4L2_IDENT_MT9M001* codes from v4l2-chip-ident.h */
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unsigned int gain;
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unsigned int exposure;
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unsigned int total_h;
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unsigned short y_skip_top; /* Lines to skip at the top */
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unsigned char autoexposure;
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};
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static struct mt9m001 *to_mt9m001(const struct i2c_client *client)
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@ -171,10 +176,8 @@ static int mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct mt9m001 *mt9m001 = to_mt9m001(client);
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struct v4l2_rect rect = a->c;
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struct soc_camera_device *icd = client->dev.platform_data;
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int ret;
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const u16 hblank = 9, vblank = 25;
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unsigned int total_h;
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if (mt9m001->fmts == mt9m001_colour_fmts)
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/*
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@ -193,7 +196,7 @@ static int mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
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soc_camera_limit_side(&rect.top, &rect.height,
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MT9M001_ROW_SKIP, MT9M001_MIN_HEIGHT, MT9M001_MAX_HEIGHT);
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total_h = rect.height + mt9m001->y_skip_top + vblank;
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mt9m001->total_h = rect.height + mt9m001->y_skip_top + vblank;
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/* Blanking and start values - default... */
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ret = reg_write(client, MT9M001_HORIZONTAL_BLANKING, hblank);
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@ -213,17 +216,8 @@ static int mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
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if (!ret)
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ret = reg_write(client, MT9M001_WINDOW_HEIGHT,
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rect.height + mt9m001->y_skip_top - 1);
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if (!ret && mt9m001->autoexposure) {
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ret = reg_write(client, MT9M001_SHUTTER_WIDTH, total_h);
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if (!ret) {
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const struct v4l2_queryctrl *qctrl =
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soc_camera_find_qctrl(icd->ops,
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V4L2_CID_EXPOSURE);
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mt9m001->exposure = (524 + (total_h - 1) *
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(qctrl->maximum - qctrl->minimum)) /
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1048 + qctrl->minimum;
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}
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}
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if (!ret && v4l2_ctrl_g_ctrl(mt9m001->autoexposure) == V4L2_EXPOSURE_AUTO)
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ret = reg_write(client, MT9M001_SHUTTER_WIDTH, mt9m001->total_h);
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if (!ret)
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mt9m001->rect = rect;
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@ -383,105 +377,48 @@ static int mt9m001_s_register(struct v4l2_subdev *sd,
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}
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#endif
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static const struct v4l2_queryctrl mt9m001_controls[] = {
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{
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.id = V4L2_CID_VFLIP,
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.type = V4L2_CTRL_TYPE_BOOLEAN,
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.name = "Flip Vertically",
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.minimum = 0,
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.maximum = 1,
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.step = 1,
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.default_value = 0,
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}, {
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.id = V4L2_CID_GAIN,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Gain",
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.minimum = 0,
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.maximum = 127,
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.step = 1,
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.default_value = 64,
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.flags = V4L2_CTRL_FLAG_SLIDER,
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}, {
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.id = V4L2_CID_EXPOSURE,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Exposure",
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.minimum = 1,
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.maximum = 255,
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.step = 1,
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.default_value = 255,
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.flags = V4L2_CTRL_FLAG_SLIDER,
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}, {
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.id = V4L2_CID_EXPOSURE_AUTO,
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.type = V4L2_CTRL_TYPE_BOOLEAN,
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.name = "Automatic Exposure",
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.minimum = 0,
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.maximum = 1,
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.step = 1,
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.default_value = 1,
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}
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};
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static struct soc_camera_ops mt9m001_ops = {
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.controls = mt9m001_controls,
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.num_controls = ARRAY_SIZE(mt9m001_controls),
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};
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static int mt9m001_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
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static int mt9m001_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct mt9m001 *mt9m001 = to_mt9m001(client);
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int data;
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struct mt9m001 *mt9m001 = container_of(ctrl->handler,
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struct mt9m001, hdl);
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s32 min, max;
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switch (ctrl->id) {
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case V4L2_CID_VFLIP:
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data = reg_read(client, MT9M001_READ_OPTIONS2);
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if (data < 0)
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return -EIO;
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ctrl->value = !!(data & 0x8000);
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break;
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case V4L2_CID_EXPOSURE_AUTO:
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ctrl->value = mt9m001->autoexposure;
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break;
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case V4L2_CID_GAIN:
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ctrl->value = mt9m001->gain;
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break;
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case V4L2_CID_EXPOSURE:
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ctrl->value = mt9m001->exposure;
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min = mt9m001->exposure->minimum;
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max = mt9m001->exposure->maximum;
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mt9m001->exposure->val =
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(524 + (mt9m001->total_h - 1) * (max - min)) / 1048 + min;
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break;
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}
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return 0;
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}
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static int mt9m001_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
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static int mt9m001_s_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct mt9m001 *mt9m001 = container_of(ctrl->handler,
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struct mt9m001, hdl);
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struct v4l2_subdev *sd = &mt9m001->subdev;
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct mt9m001 *mt9m001 = to_mt9m001(client);
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struct soc_camera_device *icd = client->dev.platform_data;
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const struct v4l2_queryctrl *qctrl;
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struct v4l2_ctrl *exp = mt9m001->exposure;
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int data;
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qctrl = soc_camera_find_qctrl(&mt9m001_ops, ctrl->id);
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if (!qctrl)
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return -EINVAL;
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switch (ctrl->id) {
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case V4L2_CID_VFLIP:
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if (ctrl->value)
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if (ctrl->val)
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data = reg_set(client, MT9M001_READ_OPTIONS2, 0x8000);
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else
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data = reg_clear(client, MT9M001_READ_OPTIONS2, 0x8000);
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if (data < 0)
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return -EIO;
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break;
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return 0;
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case V4L2_CID_GAIN:
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if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
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return -EINVAL;
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/* See Datasheet Table 7, Gain settings. */
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if (ctrl->value <= qctrl->default_value) {
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if (ctrl->val <= ctrl->default_value) {
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/* Pack it into 0..1 step 0.125, register values 0..8 */
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unsigned long range = qctrl->default_value - qctrl->minimum;
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data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range;
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unsigned long range = ctrl->default_value - ctrl->minimum;
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data = ((ctrl->val - ctrl->minimum) * 8 + range / 2) / range;
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dev_dbg(&client->dev, "Setting gain %d\n", data);
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data = reg_write(client, MT9M001_GLOBAL_GAIN, data);
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@ -490,8 +427,8 @@ static int mt9m001_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
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} else {
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/* Pack it into 1.125..15 variable step, register values 9..67 */
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/* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */
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unsigned long range = qctrl->maximum - qctrl->default_value - 1;
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unsigned long gain = ((ctrl->value - qctrl->default_value - 1) *
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unsigned long range = ctrl->maximum - ctrl->default_value - 1;
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unsigned long gain = ((ctrl->val - ctrl->default_value - 1) *
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111 + range / 2) / range + 9;
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if (gain <= 32)
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@ -507,47 +444,30 @@ static int mt9m001_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
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if (data < 0)
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return -EIO;
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}
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return 0;
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/* Success */
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mt9m001->gain = ctrl->value;
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break;
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case V4L2_CID_EXPOSURE:
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/* mt9m001 has maximum == default */
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if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
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return -EINVAL;
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else {
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unsigned long range = qctrl->maximum - qctrl->minimum;
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unsigned long shutter = ((ctrl->value - qctrl->minimum) * 1048 +
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case V4L2_CID_EXPOSURE_AUTO:
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if (ctrl->val == V4L2_EXPOSURE_MANUAL) {
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unsigned long range = exp->maximum - exp->minimum;
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unsigned long shutter = ((exp->val - exp->minimum) * 1048 +
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range / 2) / range + 1;
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dev_dbg(&client->dev,
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"Setting shutter width from %d to %lu\n",
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reg_read(client, MT9M001_SHUTTER_WIDTH),
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shutter);
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reg_read(client, MT9M001_SHUTTER_WIDTH), shutter);
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if (reg_write(client, MT9M001_SHUTTER_WIDTH, shutter) < 0)
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return -EIO;
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mt9m001->exposure = ctrl->value;
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mt9m001->autoexposure = 0;
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}
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break;
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case V4L2_CID_EXPOSURE_AUTO:
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if (ctrl->value) {
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} else {
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const u16 vblank = 25;
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unsigned int total_h = mt9m001->rect.height +
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mt9m001->total_h = mt9m001->rect.height +
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mt9m001->y_skip_top + vblank;
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if (reg_write(client, MT9M001_SHUTTER_WIDTH,
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total_h) < 0)
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if (reg_write(client, MT9M001_SHUTTER_WIDTH, mt9m001->total_h) < 0)
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return -EIO;
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qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE);
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mt9m001->exposure = (524 + (total_h - 1) *
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(qctrl->maximum - qctrl->minimum)) /
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1048 + qctrl->minimum;
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mt9m001->autoexposure = 1;
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} else
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mt9m001->autoexposure = 0;
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break;
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}
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return 0;
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}
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return 0;
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return -EINVAL;
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}
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/*
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@ -621,10 +541,7 @@ static int mt9m001_video_probe(struct soc_camera_device *icd,
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dev_err(&client->dev, "Failed to initialise the camera\n");
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/* mt9m001_init() has reset the chip, returning registers to defaults */
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mt9m001->gain = 64;
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mt9m001->exposure = 255;
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return ret;
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return v4l2_ctrl_handler_setup(&mt9m001->hdl);
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}
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static void mt9m001_video_remove(struct soc_camera_device *icd)
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@ -647,9 +564,12 @@ static int mt9m001_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
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return 0;
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}
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static const struct v4l2_ctrl_ops mt9m001_ctrl_ops = {
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.g_volatile_ctrl = mt9m001_g_volatile_ctrl,
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.s_ctrl = mt9m001_s_ctrl,
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};
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static struct v4l2_subdev_core_ops mt9m001_subdev_core_ops = {
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.g_ctrl = mt9m001_g_ctrl,
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.s_ctrl = mt9m001_s_ctrl,
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.g_chip_ident = mt9m001_g_chip_ident,
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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.g_register = mt9m001_g_register,
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@ -765,25 +685,40 @@ static int mt9m001_probe(struct i2c_client *client,
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return -ENOMEM;
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v4l2_i2c_subdev_init(&mt9m001->subdev, client, &mt9m001_subdev_ops);
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v4l2_ctrl_handler_init(&mt9m001->hdl, 4);
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v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops,
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V4L2_CID_VFLIP, 0, 1, 1, 0);
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v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops,
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V4L2_CID_GAIN, 0, 127, 1, 64);
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mt9m001->exposure = v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops,
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V4L2_CID_EXPOSURE, 1, 255, 1, 255);
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/*
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* Simulated autoexposure. If enabled, we calculate shutter width
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* ourselves in the driver based on vertical blanking and frame width
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*/
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mt9m001->autoexposure = v4l2_ctrl_new_std_menu(&mt9m001->hdl,
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&mt9m001_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
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V4L2_EXPOSURE_AUTO);
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mt9m001->subdev.ctrl_handler = &mt9m001->hdl;
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if (mt9m001->hdl.error) {
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int err = mt9m001->hdl.error;
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kfree(mt9m001);
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return err;
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}
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v4l2_ctrl_auto_cluster(2, &mt9m001->autoexposure,
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V4L2_EXPOSURE_MANUAL, true);
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/* Second stage probe - when a capture adapter is there */
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icd->ops = &mt9m001_ops;
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mt9m001->y_skip_top = 0;
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mt9m001->rect.left = MT9M001_COLUMN_SKIP;
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mt9m001->rect.top = MT9M001_ROW_SKIP;
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mt9m001->rect.width = MT9M001_MAX_WIDTH;
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mt9m001->rect.height = MT9M001_MAX_HEIGHT;
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/*
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* Simulated autoexposure. If enabled, we calculate shutter width
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* ourselves in the driver based on vertical blanking and frame width
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*/
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mt9m001->autoexposure = 1;
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ret = mt9m001_video_probe(icd, client);
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if (ret) {
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icd->ops = NULL;
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v4l2_ctrl_handler_free(&mt9m001->hdl);
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kfree(mt9m001);
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}
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@ -795,7 +730,8 @@ static int mt9m001_remove(struct i2c_client *client)
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struct mt9m001 *mt9m001 = to_mt9m001(client);
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struct soc_camera_device *icd = client->dev.platform_data;
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icd->ops = NULL;
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v4l2_device_unregister_subdev(&mt9m001->subdev);
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v4l2_ctrl_handler_free(&mt9m001->hdl);
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mt9m001_video_remove(icd);
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kfree(mt9m001);
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