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authorJavier Martin <javier.martin@vista-silicon.com>2013-01-29 07:31:17 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2013-02-08 14:37:02 -0200
commit492959c77f66c2238298115f4fabf1bb9ca997eb (patch)
tree6b3a35b47bda99e2ba891d622e0a22defed887e9
parentee95258ed3926f3aa2cf8d62e62cd51be466fe26 (diff)
[media] ov7670: use the control framework
Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Javier Martin <javier.martin@vista-silicon.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
-rw-r--r--drivers/media/i2c/ov7670.c310
1 files changed, 112 insertions, 198 deletions
diff --git a/drivers/media/i2c/ov7670.c b/drivers/media/i2c/ov7670.c
index 52c024a334df..93a051e8873f 100644
--- a/drivers/media/i2c/ov7670.c
+++ b/drivers/media/i2c/ov7670.c
@@ -18,6 +18,7 @@
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-chip-ident.h>
+#include <media/v4l2-ctrls.h>
#include <media/v4l2-mediabus.h>
#include <media/ov7670.h>
@@ -222,9 +223,23 @@ struct ov7670_devtype {
struct ov7670_format_struct; /* coming later */
struct ov7670_info {
struct v4l2_subdev sd;
+ struct v4l2_ctrl_handler hdl;
+ struct {
+ /* gain cluster */
+ struct v4l2_ctrl *auto_gain;
+ struct v4l2_ctrl *gain;
+ };
+ struct {
+ /* exposure cluster */
+ struct v4l2_ctrl *auto_exposure;
+ struct v4l2_ctrl *exposure;
+ };
+ struct {
+ /* saturation/hue cluster */
+ struct v4l2_ctrl *saturation;
+ struct v4l2_ctrl *hue;
+ };
struct ov7670_format_struct *fmt; /* Current format */
- unsigned char sat; /* Saturation value */
- int hue; /* Hue value */
int min_width; /* Filter out smaller sizes */
int min_height; /* Filter out smaller sizes */
int clock_speed; /* External clock speed (MHz) */
@@ -240,6 +255,11 @@ static inline struct ov7670_info *to_state(struct v4l2_subdev *sd)
return container_of(sd, struct ov7670_info, sd);
}
+static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
+{
+ return &container_of(ctrl->handler, struct ov7670_info, hdl)->sd;
+}
+
/*
@@ -1195,23 +1215,23 @@ static int ov7670_cosine(int theta)
static void ov7670_calc_cmatrix(struct ov7670_info *info,
- int matrix[CMATRIX_LEN])
+ int matrix[CMATRIX_LEN], int sat, int hue)
{
int i;
/*
* Apply the current saturation setting first.
*/
for (i = 0; i < CMATRIX_LEN; i++)
- matrix[i] = (info->fmt->cmatrix[i]*info->sat) >> 7;
+ matrix[i] = (info->fmt->cmatrix[i] * sat) >> 7;
/*
* Then, if need be, rotate the hue value.
*/
- if (info->hue != 0) {
+ if (hue != 0) {
int sinth, costh, tmpmatrix[CMATRIX_LEN];
memcpy(tmpmatrix, matrix, CMATRIX_LEN*sizeof(int));
- sinth = ov7670_sine(info->hue);
- costh = ov7670_cosine(info->hue);
+ sinth = ov7670_sine(hue);
+ costh = ov7670_cosine(hue);
matrix[0] = (matrix[3]*sinth + matrix[0]*costh)/1000;
matrix[1] = (matrix[4]*sinth + matrix[1]*costh)/1000;
@@ -1224,60 +1244,21 @@ static void ov7670_calc_cmatrix(struct ov7670_info *info,
-static int ov7670_s_sat(struct v4l2_subdev *sd, int value)
+static int ov7670_s_sat_hue(struct v4l2_subdev *sd, int sat, int hue)
{
struct ov7670_info *info = to_state(sd);
int matrix[CMATRIX_LEN];
int ret;
- info->sat = value;
- ov7670_calc_cmatrix(info, matrix);
+ ov7670_calc_cmatrix(info, matrix, sat, hue);
ret = ov7670_store_cmatrix(sd, matrix);
return ret;
}
-static int ov7670_g_sat(struct v4l2_subdev *sd, __s32 *value)
-{
- struct ov7670_info *info = to_state(sd);
-
- *value = info->sat;
- return 0;
-}
-
-static int ov7670_s_hue(struct v4l2_subdev *sd, int value)
-{
- struct ov7670_info *info = to_state(sd);
- int matrix[CMATRIX_LEN];
- int ret;
-
- if (value < -180 || value > 180)
- return -EINVAL;
- info->hue = value;
- ov7670_calc_cmatrix(info, matrix);
- ret = ov7670_store_cmatrix(sd, matrix);
- return ret;
-}
-
-
-static int ov7670_g_hue(struct v4l2_subdev *sd, __s32 *value)
-{
- struct ov7670_info *info = to_state(sd);
-
- *value = info->hue;
- return 0;
-}
-
/*
* Some weird registers seem to store values in a sign/magnitude format!
*/
-static unsigned char ov7670_sm_to_abs(unsigned char v)
-{
- if ((v & 0x80) == 0)
- return v + 128;
- return 128 - (v & 0x7f);
-}
-
static unsigned char ov7670_abs_to_sm(unsigned char v)
{
@@ -1299,40 +1280,11 @@ static int ov7670_s_brightness(struct v4l2_subdev *sd, int value)
return ret;
}
-static int ov7670_g_brightness(struct v4l2_subdev *sd, __s32 *value)
-{
- unsigned char v = 0;
- int ret = ov7670_read(sd, REG_BRIGHT, &v);
-
- *value = ov7670_sm_to_abs(v);
- return ret;
-}
-
static int ov7670_s_contrast(struct v4l2_subdev *sd, int value)
{
return ov7670_write(sd, REG_CONTRAS, (unsigned char) value);
}
-static int ov7670_g_contrast(struct v4l2_subdev *sd, __s32 *value)
-{
- unsigned char v = 0;
- int ret = ov7670_read(sd, REG_CONTRAS, &v);
-
- *value = v;
- return ret;
-}
-
-static int ov7670_g_hflip(struct v4l2_subdev *sd, __s32 *value)
-{
- int ret;
- unsigned char v = 0;
-
- ret = ov7670_read(sd, REG_MVFP, &v);
- *value = (v & MVFP_MIRROR) == MVFP_MIRROR;
- return ret;
-}
-
-
static int ov7670_s_hflip(struct v4l2_subdev *sd, int value)
{
unsigned char v = 0;
@@ -1348,19 +1300,6 @@ static int ov7670_s_hflip(struct v4l2_subdev *sd, int value)
return ret;
}
-
-
-static int ov7670_g_vflip(struct v4l2_subdev *sd, __s32 *value)
-{
- int ret;
- unsigned char v = 0;
-
- ret = ov7670_read(sd, REG_MVFP, &v);
- *value = (v & MVFP_FLIP) == MVFP_FLIP;
- return ret;
-}
-
-
static int ov7670_s_vflip(struct v4l2_subdev *sd, int value)
{
unsigned char v = 0;
@@ -1409,16 +1348,6 @@ static int ov7670_s_gain(struct v4l2_subdev *sd, int value)
/*
* Tweak autogain.
*/
-static int ov7670_g_autogain(struct v4l2_subdev *sd, __s32 *value)
-{
- int ret;
- unsigned char com8;
-
- ret = ov7670_read(sd, REG_COM8, &com8);
- *value = (com8 & COM8_AGC) != 0;
- return ret;
-}
-
static int ov7670_s_autogain(struct v4l2_subdev *sd, int value)
{
int ret;
@@ -1435,22 +1364,6 @@ static int ov7670_s_autogain(struct v4l2_subdev *sd, int value)
return ret;
}
-/*
- * Exposure is spread all over the place: top 6 bits in AECHH, middle
- * 8 in AECH, and two stashed in COM1 just for the hell of it.
- */
-static int ov7670_g_exp(struct v4l2_subdev *sd, __s32 *value)
-{
- int ret;
- unsigned char com1, aech, aechh;
-
- ret = ov7670_read(sd, REG_COM1, &com1) +
- ov7670_read(sd, REG_AECH, &aech) +
- ov7670_read(sd, REG_AECHH, &aechh);
- *value = ((aechh & 0x3f) << 10) | (aech << 2) | (com1 & 0x03);
- return ret;
-}
-
static int ov7670_s_exp(struct v4l2_subdev *sd, int value)
{
int ret;
@@ -1477,20 +1390,6 @@ static int ov7670_s_exp(struct v4l2_subdev *sd, int value)
/*
* Tweak autoexposure.
*/
-static int ov7670_g_autoexp(struct v4l2_subdev *sd, __s32 *value)
-{
- int ret;
- unsigned char com8;
- enum v4l2_exposure_auto_type *atype = (enum v4l2_exposure_auto_type *) value;
-
- ret = ov7670_read(sd, REG_COM8, &com8);
- if (com8 & COM8_AEC)
- *atype = V4L2_EXPOSURE_AUTO;
- else
- *atype = V4L2_EXPOSURE_MANUAL;
- return ret;
-}
-
static int ov7670_s_autoexp(struct v4l2_subdev *sd,
enum v4l2_exposure_auto_type value)
{
@@ -1509,90 +1408,60 @@ static int ov7670_s_autoexp(struct v4l2_subdev *sd,
}
-
-static int ov7670_queryctrl(struct v4l2_subdev *sd,
- struct v4l2_queryctrl *qc)
+static int ov7670_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
{
- /* Fill in min, max, step and default value for these controls. */
- switch (qc->id) {
- case V4L2_CID_BRIGHTNESS:
- return v4l2_ctrl_query_fill(qc, 0, 255, 1, 128);
- case V4L2_CID_CONTRAST:
- return v4l2_ctrl_query_fill(qc, 0, 127, 1, 64);
- case V4L2_CID_VFLIP:
- case V4L2_CID_HFLIP:
- return v4l2_ctrl_query_fill(qc, 0, 1, 1, 0);
- case V4L2_CID_SATURATION:
- return v4l2_ctrl_query_fill(qc, 0, 256, 1, 128);
- case V4L2_CID_HUE:
- return v4l2_ctrl_query_fill(qc, -180, 180, 5, 0);
- case V4L2_CID_GAIN:
- return v4l2_ctrl_query_fill(qc, 0, 255, 1, 128);
- case V4L2_CID_AUTOGAIN:
- return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
- case V4L2_CID_EXPOSURE:
- return v4l2_ctrl_query_fill(qc, 0, 65535, 1, 500);
- case V4L2_CID_EXPOSURE_AUTO:
- return v4l2_ctrl_query_fill(qc, 0, 1, 1, 0);
- }
- return -EINVAL;
-}
+ struct v4l2_subdev *sd = to_sd(ctrl);
+ struct ov7670_info *info = to_state(sd);
-static int ov7670_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
-{
switch (ctrl->id) {
- case V4L2_CID_BRIGHTNESS:
- return ov7670_g_brightness(sd, &ctrl->value);
- case V4L2_CID_CONTRAST:
- return ov7670_g_contrast(sd, &ctrl->value);
- case V4L2_CID_SATURATION:
- return ov7670_g_sat(sd, &ctrl->value);
- case V4L2_CID_HUE:
- return ov7670_g_hue(sd, &ctrl->value);
- case V4L2_CID_VFLIP:
- return ov7670_g_vflip(sd, &ctrl->value);
- case V4L2_CID_HFLIP:
- return ov7670_g_hflip(sd, &ctrl->value);
- case V4L2_CID_GAIN:
- return ov7670_g_gain(sd, &ctrl->value);
case V4L2_CID_AUTOGAIN:
- return ov7670_g_autogain(sd, &ctrl->value);
- case V4L2_CID_EXPOSURE:
- return ov7670_g_exp(sd, &ctrl->value);
- case V4L2_CID_EXPOSURE_AUTO:
- return ov7670_g_autoexp(sd, &ctrl->value);
+ return ov7670_g_gain(sd, &info->gain->val);
}
return -EINVAL;
}
-static int ov7670_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+static int ov7670_s_ctrl(struct v4l2_ctrl *ctrl)
{
+ struct v4l2_subdev *sd = to_sd(ctrl);
+ struct ov7670_info *info = to_state(sd);
+
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
- return ov7670_s_brightness(sd, ctrl->value);
+ return ov7670_s_brightness(sd, ctrl->val);
case V4L2_CID_CONTRAST:
- return ov7670_s_contrast(sd, ctrl->value);
+ return ov7670_s_contrast(sd, ctrl->val);
case V4L2_CID_SATURATION:
- return ov7670_s_sat(sd, ctrl->value);
- case V4L2_CID_HUE:
- return ov7670_s_hue(sd, ctrl->value);
+ return ov7670_s_sat_hue(sd,
+ info->saturation->val, info->hue->val);
case V4L2_CID_VFLIP:
- return ov7670_s_vflip(sd, ctrl->value);
+ return ov7670_s_vflip(sd, ctrl->val);
case V4L2_CID_HFLIP:
- return ov7670_s_hflip(sd, ctrl->value);
- case V4L2_CID_GAIN:
- return ov7670_s_gain(sd, ctrl->value);
+ return ov7670_s_hflip(sd, ctrl->val);
case V4L2_CID_AUTOGAIN:
- return ov7670_s_autogain(sd, ctrl->value);
- case V4L2_CID_EXPOSURE:
- return ov7670_s_exp(sd, ctrl->value);
+ /* Only set manual gain if auto gain is not explicitly
+ turned on. */
+ if (!ctrl->val) {
+ /* ov7670_s_gain turns off auto gain */
+ return ov7670_s_gain(sd, info->gain->val);
+ }
+ return ov7670_s_autogain(sd, ctrl->val);
case V4L2_CID_EXPOSURE_AUTO:
- return ov7670_s_autoexp(sd,
- (enum v4l2_exposure_auto_type) ctrl->value);
+ /* Only set manual exposure if auto exposure is not explicitly
+ turned on. */
+ if (ctrl->val == V4L2_EXPOSURE_MANUAL) {
+ /* ov7670_s_exp turns off auto exposure */
+ return ov7670_s_exp(sd, info->exposure->val);
+ }
+ return ov7670_s_autoexp(sd, ctrl->val);
}
return -EINVAL;
}
+static const struct v4l2_ctrl_ops ov7670_ctrl_ops = {
+ .s_ctrl = ov7670_s_ctrl,
+ .g_volatile_ctrl = ov7670_g_volatile_ctrl,
+};
+
static int ov7670_g_chip_ident(struct v4l2_subdev *sd,
struct v4l2_dbg_chip_ident *chip)
{
@@ -1635,9 +1504,13 @@ static int ov7670_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *r
static const struct v4l2_subdev_core_ops ov7670_core_ops = {
.g_chip_ident = ov7670_g_chip_ident,
- .g_ctrl = ov7670_g_ctrl,
- .s_ctrl = ov7670_s_ctrl,
- .queryctrl = ov7670_queryctrl,
+ .g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
+ .try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
+ .s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
+ .g_ctrl = v4l2_subdev_g_ctrl,
+ .s_ctrl = v4l2_subdev_s_ctrl,
+ .queryctrl = v4l2_subdev_queryctrl,
+ .querymenu = v4l2_subdev_querymenu,
.reset = ov7670_reset,
.init = ov7670_init,
#ifdef CONFIG_VIDEO_ADV_DEBUG
@@ -1732,7 +1605,6 @@ static int ov7670_probe(struct i2c_client *client,
info->devtype = &ov7670_devdata[id->driver_data];
info->fmt = &ov7670_formats[0];
- info->sat = 128; /* Review this */
info->clkrc = 0;
/* Set default frame rate to 30 fps */
@@ -1743,6 +1615,46 @@ static int ov7670_probe(struct i2c_client *client,
if (info->pclk_hb_disable)
ov7670_write(sd, REG_COM10, COM10_PCLK_HB);
+ v4l2_ctrl_handler_init(&info->hdl, 10);
+ v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,
+ V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
+ v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,
+ V4L2_CID_CONTRAST, 0, 127, 1, 64);
+ v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,
+ V4L2_CID_VFLIP, 0, 1, 1, 0);
+ v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,
+ V4L2_CID_HFLIP, 0, 1, 1, 0);
+ info->saturation = v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,
+ V4L2_CID_SATURATION, 0, 256, 1, 128);
+ info->hue = v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,
+ V4L2_CID_HUE, -180, 180, 5, 0);
+ info->gain = v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,
+ V4L2_CID_GAIN, 0, 255, 1, 128);
+ info->auto_gain = v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,
+ V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
+ info->exposure = v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,
+ V4L2_CID_EXPOSURE, 0, 65535, 1, 500);
+ info->auto_exposure = v4l2_ctrl_new_std_menu(&info->hdl, &ov7670_ctrl_ops,
+ V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL, 0,
+ V4L2_EXPOSURE_AUTO);
+ sd->ctrl_handler = &info->hdl;
+ if (info->hdl.error) {
+ int err = info->hdl.error;
+
+ v4l2_ctrl_handler_free(&info->hdl);
+ kfree(info);
+ return err;
+ }
+ /*
+ * We have checked empirically that hw allows to read back the gain
+ * value chosen by auto gain but that's not the case for auto exposure.
+ */
+ v4l2_ctrl_auto_cluster(2, &info->auto_gain, 0, true);
+ v4l2_ctrl_auto_cluster(2, &info->auto_exposure,
+ V4L2_EXPOSURE_MANUAL, false);
+ v4l2_ctrl_cluster(2, &info->saturation);
+ v4l2_ctrl_handler_setup(&info->hdl);
+
return 0;
}
@@ -1750,9 +1662,11 @@ static int ov7670_probe(struct i2c_client *client,
static int ov7670_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct ov7670_info *info = to_state(sd);
v4l2_device_unregister_subdev(sd);
- kfree(to_state(sd));
+ v4l2_ctrl_handler_free(&info->hdl);
+ kfree(info);
return 0;
}

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