From 492959c77f66c2238298115f4fabf1bb9ca997eb Mon Sep 17 00:00:00 2001 From: Javier Martin Date: Tue, 29 Jan 2013 07:31:17 -0300 Subject: [PATCH] [media] ov7670: use the control framework Cc: Jonathan Corbet Signed-off-by: Javier Martin Signed-off-by: Mauro Carvalho Chehab --- drivers/media/i2c/ov7670.c | 312 ++++++++++++++----------------------- 1 file changed, 113 insertions(+), 199 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 #include #include +#include #include #include @@ -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) { @@ -1509,89 +1408,59 @@ 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); + struct v4l2_subdev *sd = to_sd(ctrl); + struct ov7670_info *info = to_state(sd); + + switch (ctrl->id) { 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 ov7670_g_gain(sd, &info->gain->val); } return -EINVAL; } -static int ov7670_g_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_g_brightness(sd, &ctrl->value); + return ov7670_s_brightness(sd, ctrl->val); case V4L2_CID_CONTRAST: - return ov7670_g_contrast(sd, &ctrl->value); + return ov7670_s_contrast(sd, ctrl->val); case V4L2_CID_SATURATION: - return ov7670_g_sat(sd, &ctrl->value); - case V4L2_CID_HUE: - return ov7670_g_hue(sd, &ctrl->value); + return ov7670_s_sat_hue(sd, + info->saturation->val, info->hue->val); case V4L2_CID_VFLIP: - return ov7670_g_vflip(sd, &ctrl->value); + return ov7670_s_vflip(sd, ctrl->val); case V4L2_CID_HFLIP: - return ov7670_g_hflip(sd, &ctrl->value); - case V4L2_CID_GAIN: - return ov7670_g_gain(sd, &ctrl->value); + return ov7670_s_hflip(sd, ctrl->val); case V4L2_CID_AUTOGAIN: - return ov7670_g_autogain(sd, &ctrl->value); - case V4L2_CID_EXPOSURE: - return ov7670_g_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_g_autoexp(sd, &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 int ov7670_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) -{ - switch (ctrl->id) { - case V4L2_CID_BRIGHTNESS: - return ov7670_s_brightness(sd, ctrl->value); - case V4L2_CID_CONTRAST: - return ov7670_s_contrast(sd, ctrl->value); - case V4L2_CID_SATURATION: - return ov7670_s_sat(sd, ctrl->value); - case V4L2_CID_HUE: - return ov7670_s_hue(sd, ctrl->value); - case V4L2_CID_VFLIP: - return ov7670_s_vflip(sd, ctrl->value); - case V4L2_CID_HFLIP: - return ov7670_s_hflip(sd, ctrl->value); - case V4L2_CID_GAIN: - return ov7670_s_gain(sd, ctrl->value); - case V4L2_CID_AUTOGAIN: - return ov7670_s_autogain(sd, ctrl->value); - case V4L2_CID_EXPOSURE: - return ov7670_s_exp(sd, ctrl->value); - case V4L2_CID_EXPOSURE_AUTO: - return ov7670_s_autoexp(sd, - (enum v4l2_exposure_auto_type) ctrl->value); - } - 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; }