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[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>
This commit is contained in:
Javier Martin
Mauro Carvalho Chehab
parent
ee95258ed3
commit
492959c77f
@ -18,6 +18,7 @@
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#include <linux/videodev2.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-chip-ident.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-mediabus.h>
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#include <media/ov7670.h>
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@ -222,9 +223,23 @@ struct ov7670_devtype {
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struct ov7670_format_struct; /* coming later */
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struct ov7670_info {
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struct v4l2_subdev sd;
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struct v4l2_ctrl_handler hdl;
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struct {
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/* gain cluster */
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struct v4l2_ctrl *auto_gain;
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struct v4l2_ctrl *gain;
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};
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struct {
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/* exposure cluster */
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struct v4l2_ctrl *auto_exposure;
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struct v4l2_ctrl *exposure;
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};
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struct {
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/* saturation/hue cluster */
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struct v4l2_ctrl *saturation;
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struct v4l2_ctrl *hue;
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};
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struct ov7670_format_struct *fmt; /* Current format */
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unsigned char sat; /* Saturation value */
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int hue; /* Hue value */
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int min_width; /* Filter out smaller sizes */
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int min_height; /* Filter out smaller sizes */
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int clock_speed; /* External clock speed (MHz) */
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@ -240,6 +255,11 @@ static inline struct ov7670_info *to_state(struct v4l2_subdev *sd)
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return container_of(sd, struct ov7670_info, sd);
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}
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static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
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{
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return &container_of(ctrl->handler, struct ov7670_info, hdl)->sd;
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}
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/*
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@ -1195,23 +1215,23 @@ static int ov7670_cosine(int theta)
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static void ov7670_calc_cmatrix(struct ov7670_info *info,
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int matrix[CMATRIX_LEN])
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int matrix[CMATRIX_LEN], int sat, int hue)
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{
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int i;
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/*
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* Apply the current saturation setting first.
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*/
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for (i = 0; i < CMATRIX_LEN; i++)
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matrix[i] = (info->fmt->cmatrix[i]*info->sat) >> 7;
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matrix[i] = (info->fmt->cmatrix[i] * sat) >> 7;
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/*
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* Then, if need be, rotate the hue value.
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*/
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if (info->hue != 0) {
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if (hue != 0) {
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int sinth, costh, tmpmatrix[CMATRIX_LEN];
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memcpy(tmpmatrix, matrix, CMATRIX_LEN*sizeof(int));
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sinth = ov7670_sine(info->hue);
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costh = ov7670_cosine(info->hue);
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sinth = ov7670_sine(hue);
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costh = ov7670_cosine(hue);
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matrix[0] = (matrix[3]*sinth + matrix[0]*costh)/1000;
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matrix[1] = (matrix[4]*sinth + matrix[1]*costh)/1000;
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@ -1224,60 +1244,21 @@ static void ov7670_calc_cmatrix(struct ov7670_info *info,
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static int ov7670_s_sat(struct v4l2_subdev *sd, int value)
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static int ov7670_s_sat_hue(struct v4l2_subdev *sd, int sat, int hue)
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{
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struct ov7670_info *info = to_state(sd);
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int matrix[CMATRIX_LEN];
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int ret;
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info->sat = value;
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ov7670_calc_cmatrix(info, matrix);
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ov7670_calc_cmatrix(info, matrix, sat, hue);
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ret = ov7670_store_cmatrix(sd, matrix);
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return ret;
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}
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static int ov7670_g_sat(struct v4l2_subdev *sd, __s32 *value)
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{
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struct ov7670_info *info = to_state(sd);
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*value = info->sat;
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return 0;
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}
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static int ov7670_s_hue(struct v4l2_subdev *sd, int value)
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{
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struct ov7670_info *info = to_state(sd);
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int matrix[CMATRIX_LEN];
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int ret;
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if (value < -180 || value > 180)
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return -EINVAL;
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info->hue = value;
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ov7670_calc_cmatrix(info, matrix);
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ret = ov7670_store_cmatrix(sd, matrix);
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return ret;
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}
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static int ov7670_g_hue(struct v4l2_subdev *sd, __s32 *value)
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{
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struct ov7670_info *info = to_state(sd);
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*value = info->hue;
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return 0;
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}
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/*
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* Some weird registers seem to store values in a sign/magnitude format!
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*/
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static unsigned char ov7670_sm_to_abs(unsigned char v)
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{
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if ((v & 0x80) == 0)
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return v + 128;
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return 128 - (v & 0x7f);
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}
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static unsigned char ov7670_abs_to_sm(unsigned char v)
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{
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@ -1299,40 +1280,11 @@ static int ov7670_s_brightness(struct v4l2_subdev *sd, int value)
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return ret;
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}
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static int ov7670_g_brightness(struct v4l2_subdev *sd, __s32 *value)
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{
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unsigned char v = 0;
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int ret = ov7670_read(sd, REG_BRIGHT, &v);
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*value = ov7670_sm_to_abs(v);
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return ret;
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}
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static int ov7670_s_contrast(struct v4l2_subdev *sd, int value)
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{
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return ov7670_write(sd, REG_CONTRAS, (unsigned char) value);
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}
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static int ov7670_g_contrast(struct v4l2_subdev *sd, __s32 *value)
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{
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unsigned char v = 0;
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int ret = ov7670_read(sd, REG_CONTRAS, &v);
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*value = v;
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return ret;
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}
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static int ov7670_g_hflip(struct v4l2_subdev *sd, __s32 *value)
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{
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int ret;
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unsigned char v = 0;
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ret = ov7670_read(sd, REG_MVFP, &v);
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*value = (v & MVFP_MIRROR) == MVFP_MIRROR;
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return ret;
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}
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static int ov7670_s_hflip(struct v4l2_subdev *sd, int value)
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{
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unsigned char v = 0;
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@ -1348,19 +1300,6 @@ static int ov7670_s_hflip(struct v4l2_subdev *sd, int value)
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return ret;
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}
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static int ov7670_g_vflip(struct v4l2_subdev *sd, __s32 *value)
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{
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int ret;
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unsigned char v = 0;
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ret = ov7670_read(sd, REG_MVFP, &v);
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*value = (v & MVFP_FLIP) == MVFP_FLIP;
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return ret;
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}
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static int ov7670_s_vflip(struct v4l2_subdev *sd, int value)
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{
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unsigned char v = 0;
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@ -1409,16 +1348,6 @@ static int ov7670_s_gain(struct v4l2_subdev *sd, int value)
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/*
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* Tweak autogain.
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*/
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static int ov7670_g_autogain(struct v4l2_subdev *sd, __s32 *value)
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{
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int ret;
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unsigned char com8;
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ret = ov7670_read(sd, REG_COM8, &com8);
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*value = (com8 & COM8_AGC) != 0;
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return ret;
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}
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static int ov7670_s_autogain(struct v4l2_subdev *sd, int value)
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{
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int ret;
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@ -1435,22 +1364,6 @@ static int ov7670_s_autogain(struct v4l2_subdev *sd, int value)
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return ret;
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}
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/*
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* Exposure is spread all over the place: top 6 bits in AECHH, middle
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* 8 in AECH, and two stashed in COM1 just for the hell of it.
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*/
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static int ov7670_g_exp(struct v4l2_subdev *sd, __s32 *value)
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{
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int ret;
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unsigned char com1, aech, aechh;
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ret = ov7670_read(sd, REG_COM1, &com1) +
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ov7670_read(sd, REG_AECH, &aech) +
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ov7670_read(sd, REG_AECHH, &aechh);
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*value = ((aechh & 0x3f) << 10) | (aech << 2) | (com1 & 0x03);
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return ret;
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}
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static int ov7670_s_exp(struct v4l2_subdev *sd, int value)
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{
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int ret;
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@ -1477,20 +1390,6 @@ static int ov7670_s_exp(struct v4l2_subdev *sd, int value)
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/*
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* Tweak autoexposure.
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*/
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static int ov7670_g_autoexp(struct v4l2_subdev *sd, __s32 *value)
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{
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int ret;
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unsigned char com8;
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enum v4l2_exposure_auto_type *atype = (enum v4l2_exposure_auto_type *) value;
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ret = ov7670_read(sd, REG_COM8, &com8);
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if (com8 & COM8_AEC)
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*atype = V4L2_EXPOSURE_AUTO;
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else
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*atype = V4L2_EXPOSURE_MANUAL;
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return ret;
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}
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static int ov7670_s_autoexp(struct v4l2_subdev *sd,
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enum v4l2_exposure_auto_type value)
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{
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@ -1509,89 +1408,59 @@ static int ov7670_s_autoexp(struct v4l2_subdev *sd,
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}
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static int ov7670_queryctrl(struct v4l2_subdev *sd,
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struct v4l2_queryctrl *qc)
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static int ov7670_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
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{
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/* Fill in min, max, step and default value for these controls. */
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switch (qc->id) {
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case V4L2_CID_BRIGHTNESS:
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return v4l2_ctrl_query_fill(qc, 0, 255, 1, 128);
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case V4L2_CID_CONTRAST:
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return v4l2_ctrl_query_fill(qc, 0, 127, 1, 64);
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case V4L2_CID_VFLIP:
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case V4L2_CID_HFLIP:
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return v4l2_ctrl_query_fill(qc, 0, 1, 1, 0);
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case V4L2_CID_SATURATION:
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return v4l2_ctrl_query_fill(qc, 0, 256, 1, 128);
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case V4L2_CID_HUE:
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return v4l2_ctrl_query_fill(qc, -180, 180, 5, 0);
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case V4L2_CID_GAIN:
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return v4l2_ctrl_query_fill(qc, 0, 255, 1, 128);
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struct v4l2_subdev *sd = to_sd(ctrl);
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struct ov7670_info *info = to_state(sd);
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switch (ctrl->id) {
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case V4L2_CID_AUTOGAIN:
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return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
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case V4L2_CID_EXPOSURE:
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return v4l2_ctrl_query_fill(qc, 0, 65535, 1, 500);
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case V4L2_CID_EXPOSURE_AUTO:
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return v4l2_ctrl_query_fill(qc, 0, 1, 1, 0);
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return ov7670_g_gain(sd, &info->gain->val);
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}
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return -EINVAL;
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}
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static int ov7670_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
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static int ov7670_s_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct v4l2_subdev *sd = to_sd(ctrl);
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struct ov7670_info *info = to_state(sd);
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switch (ctrl->id) {
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case V4L2_CID_BRIGHTNESS:
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return ov7670_g_brightness(sd, &ctrl->value);
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return ov7670_s_brightness(sd, ctrl->val);
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case V4L2_CID_CONTRAST:
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return ov7670_g_contrast(sd, &ctrl->value);
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return ov7670_s_contrast(sd, ctrl->val);
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case V4L2_CID_SATURATION:
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return ov7670_g_sat(sd, &ctrl->value);
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case V4L2_CID_HUE:
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return ov7670_g_hue(sd, &ctrl->value);
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return ov7670_s_sat_hue(sd,
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info->saturation->val, info->hue->val);
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case V4L2_CID_VFLIP:
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return ov7670_g_vflip(sd, &ctrl->value);
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return ov7670_s_vflip(sd, ctrl->val);
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case V4L2_CID_HFLIP:
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return ov7670_g_hflip(sd, &ctrl->value);
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case V4L2_CID_GAIN:
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return ov7670_g_gain(sd, &ctrl->value);
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return ov7670_s_hflip(sd, ctrl->val);
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case V4L2_CID_AUTOGAIN:
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return ov7670_g_autogain(sd, &ctrl->value);
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case V4L2_CID_EXPOSURE:
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return ov7670_g_exp(sd, &ctrl->value);
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/* Only set manual gain if auto gain is not explicitly
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turned on. */
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if (!ctrl->val) {
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/* ov7670_s_gain turns off auto gain */
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return ov7670_s_gain(sd, info->gain->val);
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}
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return ov7670_s_autogain(sd, ctrl->val);
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case V4L2_CID_EXPOSURE_AUTO:
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return ov7670_g_autoexp(sd, &ctrl->value);
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/* Only set manual exposure if auto exposure is not explicitly
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turned on. */
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if (ctrl->val == V4L2_EXPOSURE_MANUAL) {
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/* ov7670_s_exp turns off auto exposure */
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return ov7670_s_exp(sd, info->exposure->val);
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}
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return ov7670_s_autoexp(sd, ctrl->val);
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}
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return -EINVAL;
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}
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static int ov7670_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
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{
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switch (ctrl->id) {
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case V4L2_CID_BRIGHTNESS:
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return ov7670_s_brightness(sd, ctrl->value);
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case V4L2_CID_CONTRAST:
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return ov7670_s_contrast(sd, ctrl->value);
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case V4L2_CID_SATURATION:
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return ov7670_s_sat(sd, ctrl->value);
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case V4L2_CID_HUE:
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return ov7670_s_hue(sd, ctrl->value);
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case V4L2_CID_VFLIP:
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return ov7670_s_vflip(sd, ctrl->value);
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case V4L2_CID_HFLIP:
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return ov7670_s_hflip(sd, ctrl->value);
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case V4L2_CID_GAIN:
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return ov7670_s_gain(sd, ctrl->value);
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case V4L2_CID_AUTOGAIN:
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return ov7670_s_autogain(sd, ctrl->value);
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case V4L2_CID_EXPOSURE:
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return ov7670_s_exp(sd, ctrl->value);
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case V4L2_CID_EXPOSURE_AUTO:
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return ov7670_s_autoexp(sd,
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(enum v4l2_exposure_auto_type) ctrl->value);
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}
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return -EINVAL;
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}
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static const struct v4l2_ctrl_ops ov7670_ctrl_ops = {
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.s_ctrl = ov7670_s_ctrl,
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.g_volatile_ctrl = ov7670_g_volatile_ctrl,
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};
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static int ov7670_g_chip_ident(struct v4l2_subdev *sd,
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struct v4l2_dbg_chip_ident *chip)
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@ -1635,9 +1504,13 @@ static int ov7670_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *r
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static const struct v4l2_subdev_core_ops ov7670_core_ops = {
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.g_chip_ident = ov7670_g_chip_ident,
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.g_ctrl = ov7670_g_ctrl,
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.s_ctrl = ov7670_s_ctrl,
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.queryctrl = ov7670_queryctrl,
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.g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
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.try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
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.s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
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.g_ctrl = v4l2_subdev_g_ctrl,
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.s_ctrl = v4l2_subdev_s_ctrl,
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.queryctrl = v4l2_subdev_queryctrl,
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.querymenu = v4l2_subdev_querymenu,
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.reset = ov7670_reset,
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.init = ov7670_init,
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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@ -1732,7 +1605,6 @@ static int ov7670_probe(struct i2c_client *client,
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info->devtype = &ov7670_devdata[id->driver_data];
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info->fmt = &ov7670_formats[0];
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info->sat = 128; /* Review this */
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info->clkrc = 0;
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/* Set default frame rate to 30 fps */
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@ -1743,6 +1615,46 @@ static int ov7670_probe(struct i2c_client *client,
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if (info->pclk_hb_disable)
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ov7670_write(sd, REG_COM10, COM10_PCLK_HB);
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v4l2_ctrl_handler_init(&info->hdl, 10);
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v4l2_ctrl_new_std(&info->hdl, &ov7670_ctrl_ops,
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V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
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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;
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user