forked from Minki/linux
[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
Mauro Carvalho Chehab
parent
af8425c54b
commit
41efcd7a68
@ -19,6 +19,7 @@
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#include <media/soc_mediabus.h>
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#include <media/v4l2-chip-ident.h>
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#include <media/v4l2-subdev.h>
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#include <media/v4l2-ctrls.h>
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/*
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* mt9t031 i2c address 0x5d
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@ -60,14 +61,18 @@
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struct mt9t031 {
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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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int model; /* V4L2_IDENT_MT9T031* codes from v4l2-chip-ident.h */
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u16 xskip;
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u16 yskip;
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unsigned int gain;
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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 int exposure;
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unsigned char autoexposure;
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};
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static struct mt9t031 *to_mt9t031(const struct i2c_client *client)
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@ -175,69 +180,6 @@ static int mt9t031_s_stream(struct v4l2_subdev *sd, int enable)
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return 0;
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}
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enum {
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MT9T031_CTRL_VFLIP,
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MT9T031_CTRL_HFLIP,
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MT9T031_CTRL_GAIN,
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MT9T031_CTRL_EXPOSURE,
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MT9T031_CTRL_EXPOSURE_AUTO,
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};
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static const struct v4l2_queryctrl mt9t031_controls[] = {
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[MT9T031_CTRL_VFLIP] = {
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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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[MT9T031_CTRL_HFLIP] = {
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.id = V4L2_CID_HFLIP,
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.type = V4L2_CTRL_TYPE_BOOLEAN,
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.name = "Flip Horizontally",
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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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[MT9T031_CTRL_GAIN] = {
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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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[MT9T031_CTRL_EXPOSURE] = {
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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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[MT9T031_CTRL_EXPOSURE_AUTO] = {
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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 mt9t031_ops = {
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.controls = mt9t031_controls,
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.num_controls = ARRAY_SIZE(mt9t031_controls),
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};
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/* target must be _even_ */
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static u16 mt9t031_skip(s32 *source, s32 target, s32 max)
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{
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@ -334,17 +276,10 @@ static int mt9t031_set_params(struct i2c_client *client,
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if (ret >= 0)
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ret = reg_write(client, MT9T031_WINDOW_HEIGHT,
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rect->height + mt9t031->y_skip_top - 1);
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if (ret >= 0 && mt9t031->autoexposure) {
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unsigned int total_h = rect->height + mt9t031->y_skip_top + vblank;
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ret = set_shutter(client, total_h);
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if (ret >= 0) {
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const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank;
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const struct v4l2_queryctrl *qctrl =
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&mt9t031_controls[MT9T031_CTRL_EXPOSURE];
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mt9t031->exposure = (shutter_max / 2 + (total_h - 1) *
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(qctrl->maximum - qctrl->minimum)) /
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shutter_max + qctrl->minimum;
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}
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if (ret >= 0 && v4l2_ctrl_g_ctrl(mt9t031->autoexposure) == V4L2_EXPOSURE_AUTO) {
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mt9t031->total_h = rect->height + mt9t031->y_skip_top + vblank;
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ret = set_shutter(client, mt9t031->total_h);
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}
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/* Re-enable register update, commit all changes */
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@ -513,71 +448,57 @@ static int mt9t031_s_register(struct v4l2_subdev *sd,
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}
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#endif
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static int mt9t031_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
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static int mt9t031_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 mt9t031 *mt9t031 = to_mt9t031(client);
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int data;
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struct mt9t031 *mt9t031 = container_of(ctrl->handler,
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struct mt9t031, hdl);
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const u32 shutter_max = MT9T031_MAX_HEIGHT + MT9T031_VERTICAL_BLANK;
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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, MT9T031_READ_MODE_2);
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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_HFLIP:
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data = reg_read(client, MT9T031_READ_MODE_2);
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if (data < 0)
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return -EIO;
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ctrl->value = !!(data & 0x4000);
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break;
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case V4L2_CID_EXPOSURE_AUTO:
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ctrl->value = mt9t031->autoexposure;
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break;
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case V4L2_CID_GAIN:
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ctrl->value = mt9t031->gain;
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break;
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case V4L2_CID_EXPOSURE:
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ctrl->value = mt9t031->exposure;
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min = mt9t031->exposure->minimum;
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max = mt9t031->exposure->maximum;
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mt9t031->exposure->val =
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(shutter_max / 2 + (mt9t031->total_h - 1) * (max - min))
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/ shutter_max + 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 mt9t031_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
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static int mt9t031_s_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct mt9t031 *mt9t031 = container_of(ctrl->handler,
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struct mt9t031, hdl);
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struct v4l2_subdev *sd = &mt9t031->subdev;
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct mt9t031 *mt9t031 = to_mt9t031(client);
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const struct v4l2_queryctrl *qctrl;
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struct v4l2_ctrl *exp = mt9t031->exposure;
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int data;
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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, MT9T031_READ_MODE_2, 0x8000);
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else
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data = reg_clear(client, MT9T031_READ_MODE_2, 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_HFLIP:
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if (ctrl->value)
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if (ctrl->val)
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data = reg_set(client, MT9T031_READ_MODE_2, 0x4000);
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else
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data = reg_clear(client, MT9T031_READ_MODE_2, 0x4000);
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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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qctrl = &mt9t031_controls[MT9T031_CTRL_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, MT9T031_GLOBAL_GAIN, data);
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@ -586,9 +507,9 @@ static int mt9t031_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
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} else {
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/* Pack it into 1.125..128 variable step, register values 9..0x7860 */
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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 range = ctrl->maximum - ctrl->default_value - 1;
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/* calculated gain: map 65..127 to 9..1024 step 0.125 */
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unsigned long gain = ((ctrl->value - qctrl->default_value - 1) *
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unsigned long gain = ((ctrl->val - ctrl->default_value - 1) *
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1015 + range / 2) / range + 9;
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if (gain <= 32) /* calculated gain 9..32 -> 9..32 */
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@ -605,19 +526,13 @@ static int mt9t031_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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mt9t031->gain = ctrl->value;
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break;
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case V4L2_CID_EXPOSURE:
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qctrl = &mt9t031_controls[MT9T031_CTRL_EXPOSURE];
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/* mt9t031 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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const unsigned long range = qctrl->maximum - qctrl->minimum;
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const u32 shutter = ((ctrl->value - qctrl->minimum) * 1048 +
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range / 2) / range + 1;
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case V4L2_CID_EXPOSURE_AUTO:
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if (ctrl->val == V4L2_EXPOSURE_MANUAL) {
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unsigned int range = exp->maximum - exp->minimum;
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unsigned int shutter = ((exp->val - exp->minimum) * 1048 +
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range / 2) / range + 1;
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u32 old;
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get_shutter(client, &old);
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@ -625,27 +540,15 @@ static int mt9t031_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
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old, shutter);
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if (set_shutter(client, shutter) < 0)
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return -EIO;
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mt9t031->exposure = ctrl->value;
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mt9t031->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 = MT9T031_VERTICAL_BLANK;
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const u32 shutter_max = MT9T031_MAX_HEIGHT + vblank;
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unsigned int total_h = mt9t031->rect.height +
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mt9t031->total_h = mt9t031->rect.height +
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mt9t031->y_skip_top + vblank;
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if (set_shutter(client, total_h) < 0)
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if (set_shutter(client, mt9t031->total_h) < 0)
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return -EIO;
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qctrl = &mt9t031_controls[MT9T031_CTRL_EXPOSURE];
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mt9t031->exposure = (shutter_max / 2 + (total_h - 1) *
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(qctrl->maximum - qctrl->minimum)) /
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shutter_max + qctrl->minimum;
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mt9t031->autoexposure = 1;
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} else
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mt9t031->autoexposure = 0;
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break;
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}
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return 0;
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default:
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return -EINVAL;
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}
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@ -735,15 +638,12 @@ static int mt9t031_video_probe(struct i2c_client *client)
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dev_info(&client->dev, "Detected a MT9T031 chip ID %x\n", data);
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ret = mt9t031_idle(client);
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if (ret < 0)
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if (ret < 0) {
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dev_err(&client->dev, "Failed to initialise the camera\n");
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else
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} else {
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vdev->dev.type = &mt9t031_dev_type;
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/* mt9t031_idle() has reset the chip to default. */
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mt9t031->exposure = 255;
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mt9t031->gain = 64;
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v4l2_ctrl_handler_setup(&mt9t031->hdl);
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}
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return ret;
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}
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@ -757,9 +657,12 @@ static int mt9t031_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 mt9t031_ctrl_ops = {
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.g_volatile_ctrl = mt9t031_g_volatile_ctrl,
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.s_ctrl = mt9t031_s_ctrl,
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};
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static struct v4l2_subdev_core_ops mt9t031_subdev_core_ops = {
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.g_ctrl = mt9t031_g_ctrl,
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.s_ctrl = mt9t031_s_ctrl,
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.g_chip_ident = mt9t031_g_chip_ident,
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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.g_register = mt9t031_g_register,
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@ -844,8 +747,6 @@ static int mt9t031_probe(struct i2c_client *client,
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dev_err(&client->dev, "MT9T031 driver needs platform data\n");
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return -EINVAL;
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}
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icd->ops = &mt9t031_ops;
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}
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
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@ -859,6 +760,33 @@ static int mt9t031_probe(struct i2c_client *client,
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return -ENOMEM;
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v4l2_i2c_subdev_init(&mt9t031->subdev, client, &mt9t031_subdev_ops);
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v4l2_ctrl_handler_init(&mt9t031->hdl, 5);
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v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops,
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V4L2_CID_VFLIP, 0, 1, 1, 0);
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v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops,
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V4L2_CID_HFLIP, 0, 1, 1, 0);
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v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops,
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V4L2_CID_GAIN, 0, 127, 1, 64);
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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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mt9t031->autoexposure = v4l2_ctrl_new_std_menu(&mt9t031->hdl,
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&mt9t031_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
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V4L2_EXPOSURE_AUTO);
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mt9t031->exposure = v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops,
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V4L2_CID_EXPOSURE, 1, 255, 1, 255);
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mt9t031->subdev.ctrl_handler = &mt9t031->hdl;
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if (mt9t031->hdl.error) {
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int err = mt9t031->hdl.error;
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kfree(mt9t031);
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return err;
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}
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v4l2_ctrl_auto_cluster(2, &mt9t031->autoexposure,
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V4L2_EXPOSURE_MANUAL, true);
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mt9t031->y_skip_top = 0;
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mt9t031->rect.left = MT9T031_COLUMN_SKIP;
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@ -866,12 +794,6 @@ static int mt9t031_probe(struct i2c_client *client,
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mt9t031->rect.width = MT9T031_MAX_WIDTH;
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mt9t031->rect.height = MT9T031_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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mt9t031->autoexposure = 1;
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mt9t031->xskip = 1;
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mt9t031->yskip = 1;
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@ -882,8 +804,7 @@ static int mt9t031_probe(struct i2c_client *client,
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mt9t031_disable(client);
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if (ret) {
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if (icd)
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icd->ops = NULL;
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v4l2_ctrl_handler_free(&mt9t031->hdl);
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kfree(mt9t031);
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}
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@ -893,10 +814,9 @@ static int mt9t031_probe(struct i2c_client *client,
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static int mt9t031_remove(struct i2c_client *client)
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{
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struct mt9t031 *mt9t031 = to_mt9t031(client);
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struct soc_camera_device *icd = client->dev.platform_data;
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if (icd)
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icd->ops = NULL;
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v4l2_device_unregister_subdev(&mt9t031->subdev);
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v4l2_ctrl_handler_free(&mt9t031->hdl);
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kfree(mt9t031);
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return 0;
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