drivers/media/i2c/s5c73m3/s5c73m3-ctrls.c - nest-learning-thermostat/6.1/linux-imx-ul - Git at Google

 /*
  * Samsung LSI S5C73M3 8M pixel camera driver
  *
  * Copyright (C) 2012, Samsung Electronics, Co., Ltd.
  * Sylwester Nawrocki <s.nawrocki@samsung.com>
  * Andrzej Hajda <a.hajda@samsung.com>
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * version 2 as published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  */

 #include <linux/sizes.h>
 #include <linux/delay.h>
 #include <linux/firmware.h>
 #include <linux/gpio.h>
 #include <linux/i2c.h>
 #include <linux/init.h>
 #include <linux/media.h>
 #include <linux/module.h>
 #include <linux/regulator/consumer.h>
 #include <linux/slab.h>
 #include <linux/spi/spi.h>
 #include <linux/videodev2.h>
 #include <media/media-entity.h>
 #include <media/v4l2-ctrls.h>
 #include <media/v4l2-device.h>
 #include <media/v4l2-subdev.h>
 #include <media/v4l2-mediabus.h>
 #include <media/s5c73m3.h>

 #include "s5c73m3.h"

 static int s5c73m3_get_af_status(struct s5c73m3 *state, struct v4l2_ctrl *ctrl)
 {
 	u16 reg = REG_AF_STATUS_UNFOCUSED;

 	int ret = s5c73m3_read(state, REG_AF_STATUS, &reg);

 	switch (reg) {
 	case REG_CAF_STATUS_FIND_SEARCH_DIR:
 	case REG_AF_STATUS_FOCUSING:
 	case REG_CAF_STATUS_FOCUSING:
 		ctrl->val = V4L2_AUTO_FOCUS_STATUS_BUSY;
 		break;
 	case REG_CAF_STATUS_FOCUSED:
 	case REG_AF_STATUS_FOCUSED:
 		ctrl->val = V4L2_AUTO_FOCUS_STATUS_REACHED;
 		break;
 	default:
 		v4l2_info(&state->sensor_sd, "Unknown AF status %#x\n", reg);
 		/* Fall through */
 	case REG_CAF_STATUS_UNFOCUSED:
 	case REG_AF_STATUS_UNFOCUSED:
 	case REG_AF_STATUS_INVALID:
 		ctrl->val = V4L2_AUTO_FOCUS_STATUS_FAILED;
 		break;
 	}

 	return ret;
 }

 static int s5c73m3_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
 {
 	struct v4l2_subdev *sd = ctrl_to_sensor_sd(ctrl);
 	struct s5c73m3 *state = sensor_sd_to_s5c73m3(sd);
 	int ret;

 	if (state->power == 0)
 		return -EBUSY;

 	switch (ctrl->id) {
 	case V4L2_CID_FOCUS_AUTO:
 		ret = s5c73m3_get_af_status(state, state->ctrls.af_status);
 		if (ret)
 			return ret;
 		break;
 	}

 	return 0;
 }

 static int s5c73m3_set_colorfx(struct s5c73m3 *state, int val)
 {
 	static const unsigned short colorfx[][2] = {
 		{ V4L2_COLORFX_NONE,	 COMM_IMAGE_EFFECT_NONE },
 		{ V4L2_COLORFX_BW,	 COMM_IMAGE_EFFECT_MONO },
 		{ V4L2_COLORFX_SEPIA,	 COMM_IMAGE_EFFECT_SEPIA },
 		{ V4L2_COLORFX_NEGATIVE, COMM_IMAGE_EFFECT_NEGATIVE },
 		{ V4L2_COLORFX_AQUA,	 COMM_IMAGE_EFFECT_AQUA },
 	};
 	int i;

 	for (i = 0; i < ARRAY_SIZE(colorfx); i++) {
 		if (colorfx[i][0] != val)
 			continue;

 		v4l2_dbg(1, s5c73m3_dbg, &state->sensor_sd,
 			 "Setting %s color effect\n",
 			 v4l2_ctrl_get_menu(state->ctrls.colorfx->id)[i]);

 		return s5c73m3_isp_command(state, COMM_IMAGE_EFFECT,
 					 colorfx[i][1]);
 	}
 	return -EINVAL;
 }

 /* Set exposure metering/exposure bias */
 static int s5c73m3_set_exposure(struct s5c73m3 *state, int auto_exp)
 {
 	struct v4l2_subdev *sd = &state->sensor_sd;
 	struct s5c73m3_ctrls *ctrls = &state->ctrls;
 	int ret = 0;

 	if (ctrls->exposure_metering->is_new) {
 		u16 metering;

 		switch (ctrls->exposure_metering->val) {
 		case V4L2_EXPOSURE_METERING_CENTER_WEIGHTED:
 			metering = COMM_METERING_CENTER;
 			break;
 		case V4L2_EXPOSURE_METERING_SPOT:
 			metering = COMM_METERING_SPOT;
 			break;
 		default:
 			metering = COMM_METERING_AVERAGE;
 			break;
 		}

 		ret = s5c73m3_isp_command(state, COMM_METERING, metering);
 	}

 	if (!ret && ctrls->exposure_bias->is_new) {
 		u16 exp_bias = ctrls->exposure_bias->val;
 		ret = s5c73m3_isp_command(state, COMM_EV, exp_bias);
 	}

 	v4l2_dbg(1, s5c73m3_dbg, sd,
 		 "%s: exposure bias: %#x, metering: %#x (%d)\n",  __func__,
 		 ctrls->exposure_bias->val, ctrls->exposure_metering->val, ret);

 	return ret;
 }

 static int s5c73m3_set_white_balance(struct s5c73m3 *state, int val)
 {
 	static const unsigned short wb[][2] = {
 		{ V4L2_WHITE_BALANCE_INCANDESCENT,  COMM_AWB_MODE_INCANDESCENT},
 		{ V4L2_WHITE_BALANCE_FLUORESCENT,   COMM_AWB_MODE_FLUORESCENT1},
 		{ V4L2_WHITE_BALANCE_FLUORESCENT_H, COMM_AWB_MODE_FLUORESCENT2},
 		{ V4L2_WHITE_BALANCE_CLOUDY,        COMM_AWB_MODE_CLOUDY},
 		{ V4L2_WHITE_BALANCE_DAYLIGHT,      COMM_AWB_MODE_DAYLIGHT},
 		{ V4L2_WHITE_BALANCE_AUTO,          COMM_AWB_MODE_AUTO},
 	};
 	int i;

 	for (i = 0; i < ARRAY_SIZE(wb); i++) {
 		if (wb[i][0] != val)
 			continue;

 		v4l2_dbg(1, s5c73m3_dbg, &state->sensor_sd,
 			 "Setting white balance to: %s\n",
 			 v4l2_ctrl_get_menu(state->ctrls.auto_wb->id)[i]);

 		return s5c73m3_isp_command(state, COMM_AWB_MODE, wb[i][1]);
 	}

 	return -EINVAL;
 }

 static int s5c73m3_af_run(struct s5c73m3 *state, bool on)
 {
 	struct s5c73m3_ctrls *c = &state->ctrls;

 	if (!on)
 		return s5c73m3_isp_command(state, COMM_AF_CON,
 							COMM_AF_CON_STOP);

 	if (c->focus_auto->val)
 		return s5c73m3_isp_command(state, COMM_AF_MODE,
 					   COMM_AF_MODE_PREVIEW_CAF_START);

 	return s5c73m3_isp_command(state, COMM_AF_CON, COMM_AF_CON_START);
 }

 static int s5c73m3_3a_lock(struct s5c73m3 *state, struct v4l2_ctrl *ctrl)
 {
 	bool awb_lock = ctrl->val & V4L2_LOCK_WHITE_BALANCE;
 	bool ae_lock = ctrl->val & V4L2_LOCK_EXPOSURE;
 	bool af_lock = ctrl->val & V4L2_LOCK_FOCUS;
 	int ret = 0;

 	if ((ctrl->val ^ ctrl->cur.val) & V4L2_LOCK_EXPOSURE) {
 		ret = s5c73m3_isp_command(state, COMM_AE_CON,
 				ae_lock ? COMM_AE_STOP : COMM_AE_START);
 		if (ret)
 			return ret;
 	}

 	if (((ctrl->val ^ ctrl->cur.val) & V4L2_LOCK_WHITE_BALANCE)
 	    && state->ctrls.auto_wb->val) {
 		ret = s5c73m3_isp_command(state, COMM_AWB_CON,
 			awb_lock ? COMM_AWB_STOP : COMM_AWB_START);
 		if (ret)
 			return ret;
 	}

 	if ((ctrl->val ^ ctrl->cur.val) & V4L2_LOCK_FOCUS)
 		ret = s5c73m3_af_run(state, ~af_lock);

 	return ret;
 }

 static int s5c73m3_set_auto_focus(struct s5c73m3 *state, int caf)
 {
 	struct s5c73m3_ctrls *c = &state->ctrls;
 	int ret = 1;

 	if (c->af_distance->is_new) {
 		u16 mode = (c->af_distance->val == V4L2_AUTO_FOCUS_RANGE_MACRO)
 				? COMM_AF_MODE_MACRO : COMM_AF_MODE_NORMAL;
 		ret = s5c73m3_isp_command(state, COMM_AF_MODE, mode);
 		if (ret != 0)
 			return ret;
 	}

 	if (!ret || (c->focus_auto->is_new && c->focus_auto->val) ||
 							c->af_start->is_new)
 		ret = s5c73m3_af_run(state, 1);
 	else if ((c->focus_auto->is_new && !c->focus_auto->val) ||
 							c->af_stop->is_new)
 		ret = s5c73m3_af_run(state, 0);
 	else
 		ret = 0;

 	return ret;
 }

 static int s5c73m3_set_contrast(struct s5c73m3 *state, int val)
 {
 	u16 reg = (val < 0) ? -val + 2 : val;
 	return s5c73m3_isp_command(state, COMM_CONTRAST, reg);
 }

 static int s5c73m3_set_saturation(struct s5c73m3 *state, int val)
 {
 	u16 reg = (val < 0) ? -val + 2 : val;
 	return s5c73m3_isp_command(state, COMM_SATURATION, reg);
 }

 static int s5c73m3_set_sharpness(struct s5c73m3 *state, int val)
 {
 	u16 reg = (val < 0) ? -val + 2 : val;
 	return s5c73m3_isp_command(state, COMM_SHARPNESS, reg);
 }

 static int s5c73m3_set_iso(struct s5c73m3 *state, int val)
 {
 	u32 iso;

 	if (val == V4L2_ISO_SENSITIVITY_MANUAL)
 		iso = state->ctrls.iso->val + 1;
 	else
 		iso = 0;

 	return s5c73m3_isp_command(state, COMM_ISO, iso);
 }

 static int s5c73m3_set_stabilization(struct s5c73m3 *state, int val)
 {
 	struct v4l2_subdev *sd = &state->sensor_sd;

 	v4l2_dbg(1, s5c73m3_dbg, sd, "Image stabilization: %d\n", val);

 	return s5c73m3_isp_command(state, COMM_FRAME_RATE, val ?
 			COMM_FRAME_RATE_ANTI_SHAKE : COMM_FRAME_RATE_AUTO_SET);
 }

 static int s5c73m3_set_jpeg_quality(struct s5c73m3 *state, int quality)
 {
 	int reg;

 	if (quality <= 65)
 		reg = COMM_IMAGE_QUALITY_NORMAL;
 	else if (quality <= 75)
 		reg = COMM_IMAGE_QUALITY_FINE;
 	else
 		reg = COMM_IMAGE_QUALITY_SUPERFINE;

 	return s5c73m3_isp_command(state, COMM_IMAGE_QUALITY, reg);
 }

 static int s5c73m3_set_scene_program(struct s5c73m3 *state, int val)
 {
 	static const unsigned short scene_lookup[] = {
 		COMM_SCENE_MODE_NONE,	     /* V4L2_SCENE_MODE_NONE */
 		COMM_SCENE_MODE_AGAINST_LIGHT,/* V4L2_SCENE_MODE_BACKLIGHT */
 		COMM_SCENE_MODE_BEACH,	     /* V4L2_SCENE_MODE_BEACH_SNOW */
 		COMM_SCENE_MODE_CANDLE,	     /* V4L2_SCENE_MODE_CANDLE_LIGHT */
 		COMM_SCENE_MODE_DAWN,	     /* V4L2_SCENE_MODE_DAWN_DUSK */
 		COMM_SCENE_MODE_FALL,	     /* V4L2_SCENE_MODE_FALL_COLORS */
 		COMM_SCENE_MODE_FIRE,	     /* V4L2_SCENE_MODE_FIREWORKS */
 		COMM_SCENE_MODE_LANDSCAPE,    /* V4L2_SCENE_MODE_LANDSCAPE */
 		COMM_SCENE_MODE_NIGHT,	     /* V4L2_SCENE_MODE_NIGHT */
 		COMM_SCENE_MODE_INDOOR,	     /* V4L2_SCENE_MODE_PARTY_INDOOR */
 		COMM_SCENE_MODE_PORTRAIT,     /* V4L2_SCENE_MODE_PORTRAIT */
 		COMM_SCENE_MODE_SPORTS,	     /* V4L2_SCENE_MODE_SPORTS */
 		COMM_SCENE_MODE_SUNSET,	     /* V4L2_SCENE_MODE_SUNSET */
 		COMM_SCENE_MODE_TEXT,	     /* V4L2_SCENE_MODE_TEXT */
 	};

 	v4l2_dbg(1, s5c73m3_dbg, &state->sensor_sd, "Setting %s scene mode\n",
 		 v4l2_ctrl_get_menu(state->ctrls.scene_mode->id)[val]);

 	return s5c73m3_isp_command(state, COMM_SCENE_MODE, scene_lookup[val]);
 }

 static int s5c73m3_set_power_line_freq(struct s5c73m3 *state, int val)
 {
 	unsigned int pwr_line_freq = COMM_FLICKER_NONE;

 	switch (val) {
 	case V4L2_CID_POWER_LINE_FREQUENCY_DISABLED:
 		pwr_line_freq = COMM_FLICKER_NONE;
 		break;
 	case V4L2_CID_POWER_LINE_FREQUENCY_50HZ:
 		pwr_line_freq = COMM_FLICKER_AUTO_50HZ;
 		break;
 	case V4L2_CID_POWER_LINE_FREQUENCY_60HZ:
 		pwr_line_freq = COMM_FLICKER_AUTO_60HZ;
 		break;
 	default:
 	case V4L2_CID_POWER_LINE_FREQUENCY_AUTO:
 		pwr_line_freq = COMM_FLICKER_NONE;
 	}

 	return s5c73m3_isp_command(state, COMM_FLICKER_MODE, pwr_line_freq);
 }

 static int s5c73m3_s_ctrl(struct v4l2_ctrl *ctrl)
 {
 	struct v4l2_subdev *sd = ctrl_to_sensor_sd(ctrl);
 	struct s5c73m3 *state = sensor_sd_to_s5c73m3(sd);
 	int ret = 0;

 	v4l2_dbg(1, s5c73m3_dbg, sd, "set_ctrl: %s, value: %d\n",
 		 ctrl->name, ctrl->val);

 	mutex_lock(&state->lock);
 	/*
 	 * If the device is not powered up by the host driver do
 	 * not apply any controls to H/W at this time. Instead
 	 * the controls will be restored right after power-up.
 	 */
 	if (state->power == 0)
 		goto unlock;

 	if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE) {
 		ret = -EINVAL;
 		goto unlock;
 	}

 	switch (ctrl->id) {
 	case V4L2_CID_3A_LOCK:
 		ret = s5c73m3_3a_lock(state, ctrl);
 		break;

 	case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
 		ret = s5c73m3_set_white_balance(state, ctrl->val);
 		break;

 	case V4L2_CID_CONTRAST:
 		ret = s5c73m3_set_contrast(state, ctrl->val);
 		break;

 	case V4L2_CID_COLORFX:
 		ret = s5c73m3_set_colorfx(state, ctrl->val);
 		break;

 	case V4L2_CID_EXPOSURE_AUTO:
 		ret = s5c73m3_set_exposure(state, ctrl->val);
 		break;

 	case V4L2_CID_FOCUS_AUTO:
 		ret = s5c73m3_set_auto_focus(state, ctrl->val);
 		break;

 	case V4L2_CID_IMAGE_STABILIZATION:
 		ret = s5c73m3_set_stabilization(state, ctrl->val);
 		break;

 	case V4L2_CID_ISO_SENSITIVITY:
 		ret = s5c73m3_set_iso(state, ctrl->val);
 		break;

 	case V4L2_CID_JPEG_COMPRESSION_QUALITY:
 		ret = s5c73m3_set_jpeg_quality(state, ctrl->val);
 		break;

 	case V4L2_CID_POWER_LINE_FREQUENCY:
 		ret = s5c73m3_set_power_line_freq(state, ctrl->val);
 		break;

 	case V4L2_CID_SATURATION:
 		ret = s5c73m3_set_saturation(state, ctrl->val);
 		break;

 	case V4L2_CID_SCENE_MODE:
 		ret = s5c73m3_set_scene_program(state, ctrl->val);
 		break;

 	case V4L2_CID_SHARPNESS:
 		ret = s5c73m3_set_sharpness(state, ctrl->val);
 		break;

 	case V4L2_CID_WIDE_DYNAMIC_RANGE:
 		ret = s5c73m3_isp_command(state, COMM_WDR, !!ctrl->val);
 		break;

 	case V4L2_CID_ZOOM_ABSOLUTE:
 		ret = s5c73m3_isp_command(state, COMM_ZOOM_STEP, ctrl->val);
 		break;
 	}
 unlock:
 	mutex_unlock(&state->lock);
 	return ret;
 }

 static const struct v4l2_ctrl_ops s5c73m3_ctrl_ops = {
 	.g_volatile_ctrl	= s5c73m3_g_volatile_ctrl,
 	.s_ctrl			= s5c73m3_s_ctrl,
 };

 /* Supported manual ISO values */
 static const s64 iso_qmenu[] = {
 	/* COMM_ISO: 0x0001...0x0004 */
 	100, 200, 400, 800,
 };

 /* Supported exposure bias values (-2.0EV...+2.0EV) */
 static const s64 ev_bias_qmenu[] = {
 	/* COMM_EV: 0x0000...0x0008 */
 	-2000, -1500, -1000, -500, 0, 500, 1000, 1500, 2000
 };

 int s5c73m3_init_controls(struct s5c73m3 *state)
 {
 	const struct v4l2_ctrl_ops *ops = &s5c73m3_ctrl_ops;
 	struct s5c73m3_ctrls *ctrls = &state->ctrls;
 	struct v4l2_ctrl_handler *hdl = &ctrls->handler;

 	int ret = v4l2_ctrl_handler_init(hdl, 22);
 	if (ret)
 		return ret;

 	/* White balance */
 	ctrls->auto_wb = v4l2_ctrl_new_std_menu(hdl, ops,
 			V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE,
 			9, ~0x15e, V4L2_WHITE_BALANCE_AUTO);

 	/* Exposure (only automatic exposure) */
 	ctrls->auto_exposure = v4l2_ctrl_new_std_menu(hdl, ops,
 			V4L2_CID_EXPOSURE_AUTO, 0, ~0x01, V4L2_EXPOSURE_AUTO);

 	ctrls->exposure_bias = v4l2_ctrl_new_int_menu(hdl, ops,
 			V4L2_CID_AUTO_EXPOSURE_BIAS,
 			ARRAY_SIZE(ev_bias_qmenu) - 1,
 			ARRAY_SIZE(ev_bias_qmenu)/2 - 1,
 			ev_bias_qmenu);

 	ctrls->exposure_metering = v4l2_ctrl_new_std_menu(hdl, ops,
 			V4L2_CID_EXPOSURE_METERING,
 			2, ~0x7, V4L2_EXPOSURE_METERING_AVERAGE);

 	/* Auto focus */
 	ctrls->focus_auto = v4l2_ctrl_new_std(hdl, ops,
 			V4L2_CID_FOCUS_AUTO, 0, 1, 1, 0);

 	ctrls->af_start = v4l2_ctrl_new_std(hdl, ops,
 			V4L2_CID_AUTO_FOCUS_START, 0, 1, 1, 0);

 	ctrls->af_stop = v4l2_ctrl_new_std(hdl, ops,
 			V4L2_CID_AUTO_FOCUS_STOP, 0, 1, 1, 0);

 	ctrls->af_status = v4l2_ctrl_new_std(hdl, ops,
 			V4L2_CID_AUTO_FOCUS_STATUS, 0,
 			(V4L2_AUTO_FOCUS_STATUS_BUSY |
 			 V4L2_AUTO_FOCUS_STATUS_REACHED |
 			 V4L2_AUTO_FOCUS_STATUS_FAILED),
 			0, V4L2_AUTO_FOCUS_STATUS_IDLE);

 	ctrls->af_distance = v4l2_ctrl_new_std_menu(hdl, ops,
 			V4L2_CID_AUTO_FOCUS_RANGE,
 			V4L2_AUTO_FOCUS_RANGE_MACRO,
 			~(1 << V4L2_AUTO_FOCUS_RANGE_NORMAL |
 			  1 << V4L2_AUTO_FOCUS_RANGE_MACRO),
 			V4L2_AUTO_FOCUS_RANGE_NORMAL);
 	/* ISO sensitivity */
 	ctrls->auto_iso = v4l2_ctrl_new_std_menu(hdl, ops,
 			V4L2_CID_ISO_SENSITIVITY_AUTO, 1, 0,
 			V4L2_ISO_SENSITIVITY_AUTO);

 	ctrls->iso = v4l2_ctrl_new_int_menu(hdl, ops,
 			V4L2_CID_ISO_SENSITIVITY, ARRAY_SIZE(iso_qmenu) - 1,
 			ARRAY_SIZE(iso_qmenu)/2 - 1, iso_qmenu);

 	ctrls->contrast = v4l2_ctrl_new_std(hdl, ops,
 			V4L2_CID_CONTRAST, -2, 2, 1, 0);

 	ctrls->saturation = v4l2_ctrl_new_std(hdl, ops,
 			V4L2_CID_SATURATION, -2, 2, 1, 0);

 	ctrls->sharpness = v4l2_ctrl_new_std(hdl, ops,
 			V4L2_CID_SHARPNESS, -2, 2, 1, 0);

 	ctrls->zoom = v4l2_ctrl_new_std(hdl, ops,
 			V4L2_CID_ZOOM_ABSOLUTE, 0, 30, 1, 0);

 	ctrls->colorfx = v4l2_ctrl_new_std_menu(hdl, ops, V4L2_CID_COLORFX,
 			V4L2_COLORFX_AQUA, ~0x40f, V4L2_COLORFX_NONE);

 	ctrls->wdr = v4l2_ctrl_new_std(hdl, ops,
 			V4L2_CID_WIDE_DYNAMIC_RANGE, 0, 1, 1, 0);

 	ctrls->stabilization = v4l2_ctrl_new_std(hdl, ops,
 			V4L2_CID_IMAGE_STABILIZATION, 0, 1, 1, 0);

 	v4l2_ctrl_new_std_menu(hdl, ops, V4L2_CID_POWER_LINE_FREQUENCY,
 			       V4L2_CID_POWER_LINE_FREQUENCY_AUTO, 0,
 			       V4L2_CID_POWER_LINE_FREQUENCY_AUTO);

 	ctrls->jpeg_quality = v4l2_ctrl_new_std(hdl, ops,
 			V4L2_CID_JPEG_COMPRESSION_QUALITY, 1, 100, 1, 80);

 	ctrls->scene_mode = v4l2_ctrl_new_std_menu(hdl, ops,
 			V4L2_CID_SCENE_MODE, V4L2_SCENE_MODE_TEXT, ~0x3fff,
 			V4L2_SCENE_MODE_NONE);

 	ctrls->aaa_lock = v4l2_ctrl_new_std(hdl, ops,
 			V4L2_CID_3A_LOCK, 0, 0x7, 0, 0);

 	if (hdl->error) {
 		ret = hdl->error;
 		v4l2_ctrl_handler_free(hdl);
 		return ret;
 	}

 	v4l2_ctrl_auto_cluster(3, &ctrls->auto_exposure, 0, false);
 	ctrls->auto_iso->flags |= V4L2_CTRL_FLAG_VOLATILE |
 				V4L2_CTRL_FLAG_UPDATE;
 	v4l2_ctrl_auto_cluster(2, &ctrls->auto_iso, 0, false);
 	ctrls->af_status->flags |= V4L2_CTRL_FLAG_VOLATILE;
 	v4l2_ctrl_cluster(6, &ctrls->focus_auto);

 	state->sensor_sd.ctrl_handler = hdl;

 	return 0;
 }
	/*
	* Samsung LSI S5C73M3 8M pixel camera driver
	*
	* Copyright (C) 2012, Samsung Electronics, Co., Ltd.
	* Sylwester Nawrocki <s.nawrocki@samsung.com>
	* Andrzej Hajda <a.hajda@samsung.com>
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License
	* version 2 as published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*/

	#include <linux/sizes.h>
	#include <linux/delay.h>
	#include <linux/firmware.h>
	#include <linux/gpio.h>
	#include <linux/i2c.h>
	#include <linux/init.h>
	#include <linux/media.h>
	#include <linux/module.h>
	#include <linux/regulator/consumer.h>
	#include <linux/slab.h>
	#include <linux/spi/spi.h>
	#include <linux/videodev2.h>
	#include <media/media-entity.h>
	#include <media/v4l2-ctrls.h>
	#include <media/v4l2-device.h>
	#include <media/v4l2-subdev.h>
	#include <media/v4l2-mediabus.h>
	#include <media/s5c73m3.h>

	#include "s5c73m3.h"

	static int s5c73m3_get_af_status(struct s5c73m3 state, struct v4l2_ctrl ctrl)
	{
	u16 reg = REG_AF_STATUS_UNFOCUSED;

	int ret = s5c73m3_read(state, REG_AF_STATUS, &reg);

	switch (reg) {
	case REG_CAF_STATUS_FIND_SEARCH_DIR:
	case REG_AF_STATUS_FOCUSING:
	case REG_CAF_STATUS_FOCUSING:
	ctrl->val = V4L2_AUTO_FOCUS_STATUS_BUSY;
	break;
	case REG_CAF_STATUS_FOCUSED:
	case REG_AF_STATUS_FOCUSED:
	ctrl->val = V4L2_AUTO_FOCUS_STATUS_REACHED;
	break;
	default:
	v4l2_info(&state->sensor_sd, "Unknown AF status %#x\n", reg);
	/* Fall through */
	case REG_CAF_STATUS_UNFOCUSED:
	case REG_AF_STATUS_UNFOCUSED:
	case REG_AF_STATUS_INVALID:
	ctrl->val = V4L2_AUTO_FOCUS_STATUS_FAILED;
	break;
	}

	return ret;
	}

	static int s5c73m3_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
	{
	struct v4l2_subdev *sd = ctrl_to_sensor_sd(ctrl);
	struct s5c73m3 *state = sensor_sd_to_s5c73m3(sd);
	int ret;

	if (state->power == 0)
	return -EBUSY;

	switch (ctrl->id) {
	case V4L2_CID_FOCUS_AUTO:
	ret = s5c73m3_get_af_status(state, state->ctrls.af_status);
	if (ret)
	return ret;
	break;
	}

	return 0;
	}

	static int s5c73m3_set_colorfx(struct s5c73m3 *state, int val)
	{
	static const unsigned short colorfx[][2] = {
	{ V4L2_COLORFX_NONE, COMM_IMAGE_EFFECT_NONE },
	{ V4L2_COLORFX_BW, COMM_IMAGE_EFFECT_MONO },
	{ V4L2_COLORFX_SEPIA, COMM_IMAGE_EFFECT_SEPIA },
	{ V4L2_COLORFX_NEGATIVE, COMM_IMAGE_EFFECT_NEGATIVE },
	{ V4L2_COLORFX_AQUA, COMM_IMAGE_EFFECT_AQUA },
	};
	int i;

	for (i = 0; i < ARRAY_SIZE(colorfx); i++) {
	if (colorfx[i][0] != val)
	continue;

	v4l2_dbg(1, s5c73m3_dbg, &state->sensor_sd,
	"Setting %s color effect\n",
	v4l2_ctrl_get_menu(state->ctrls.colorfx->id)[i]);

	return s5c73m3_isp_command(state, COMM_IMAGE_EFFECT,
	colorfx[i][1]);
	}
	return -EINVAL;
	}

	/* Set exposure metering/exposure bias */
	static int s5c73m3_set_exposure(struct s5c73m3 *state, int auto_exp)
	{
	struct v4l2_subdev *sd = &state->sensor_sd;
	struct s5c73m3_ctrls *ctrls = &state->ctrls;
	int ret = 0;

	if (ctrls->exposure_metering->is_new) {
	u16 metering;

	switch (ctrls->exposure_metering->val) {
	case V4L2_EXPOSURE_METERING_CENTER_WEIGHTED:
	metering = COMM_METERING_CENTER;
	break;
	case V4L2_EXPOSURE_METERING_SPOT:
	metering = COMM_METERING_SPOT;
	break;
	default:
	metering = COMM_METERING_AVERAGE;
	break;
	}

	ret = s5c73m3_isp_command(state, COMM_METERING, metering);
	}

	if (!ret && ctrls->exposure_bias->is_new) {
	u16 exp_bias = ctrls->exposure_bias->val;
	ret = s5c73m3_isp_command(state, COMM_EV, exp_bias);
	}

	v4l2_dbg(1, s5c73m3_dbg, sd,
	"%s: exposure bias: %#x, metering: %#x (%d)\n", __func__,
	ctrls->exposure_bias->val, ctrls->exposure_metering->val, ret);

	return ret;
	}

	static int s5c73m3_set_white_balance(struct s5c73m3 *state, int val)
	{
	static const unsigned short wb[][2] = {
	{ V4L2_WHITE_BALANCE_INCANDESCENT, COMM_AWB_MODE_INCANDESCENT},
	{ V4L2_WHITE_BALANCE_FLUORESCENT, COMM_AWB_MODE_FLUORESCENT1},
	{ V4L2_WHITE_BALANCE_FLUORESCENT_H, COMM_AWB_MODE_FLUORESCENT2},
	{ V4L2_WHITE_BALANCE_CLOUDY, COMM_AWB_MODE_CLOUDY},
	{ V4L2_WHITE_BALANCE_DAYLIGHT, COMM_AWB_MODE_DAYLIGHT},
	{ V4L2_WHITE_BALANCE_AUTO, COMM_AWB_MODE_AUTO},
	};
	int i;

	for (i = 0; i < ARRAY_SIZE(wb); i++) {
	if (wb[i][0] != val)
	continue;

	v4l2_dbg(1, s5c73m3_dbg, &state->sensor_sd,
	"Setting white balance to: %s\n",
	v4l2_ctrl_get_menu(state->ctrls.auto_wb->id)[i]);

	return s5c73m3_isp_command(state, COMM_AWB_MODE, wb[i][1]);
	}

	return -EINVAL;
	}

	static int s5c73m3_af_run(struct s5c73m3 *state, bool on)
	{
	struct s5c73m3_ctrls *c = &state->ctrls;

	if (!on)
	return s5c73m3_isp_command(state, COMM_AF_CON,
	COMM_AF_CON_STOP);

	if (c->focus_auto->val)
	return s5c73m3_isp_command(state, COMM_AF_MODE,
	COMM_AF_MODE_PREVIEW_CAF_START);

	return s5c73m3_isp_command(state, COMM_AF_CON, COMM_AF_CON_START);
	}

	static int s5c73m3_3a_lock(struct s5c73m3 state, struct v4l2_ctrl ctrl)
	{
	bool awb_lock = ctrl->val & V4L2_LOCK_WHITE_BALANCE;
	bool ae_lock = ctrl->val & V4L2_LOCK_EXPOSURE;
	bool af_lock = ctrl->val & V4L2_LOCK_FOCUS;
	int ret = 0;

	if ((ctrl->val ^ ctrl->cur.val) & V4L2_LOCK_EXPOSURE) {
	ret = s5c73m3_isp_command(state, COMM_AE_CON,
	ae_lock ? COMM_AE_STOP : COMM_AE_START);
	if (ret)
	return ret;
	}

	if (((ctrl->val ^ ctrl->cur.val) & V4L2_LOCK_WHITE_BALANCE)
	&& state->ctrls.auto_wb->val) {
	ret = s5c73m3_isp_command(state, COMM_AWB_CON,
	awb_lock ? COMM_AWB_STOP : COMM_AWB_START);
	if (ret)
	return ret;
	}

	if ((ctrl->val ^ ctrl->cur.val) & V4L2_LOCK_FOCUS)
	ret = s5c73m3_af_run(state, ~af_lock);

	return ret;
	}

	static int s5c73m3_set_auto_focus(struct s5c73m3 *state, int caf)
	{
	struct s5c73m3_ctrls *c = &state->ctrls;
	int ret = 1;

	if (c->af_distance->is_new) {
	u16 mode = (c->af_distance->val == V4L2_AUTO_FOCUS_RANGE_MACRO)
	? COMM_AF_MODE_MACRO : COMM_AF_MODE_NORMAL;
	ret = s5c73m3_isp_command(state, COMM_AF_MODE, mode);
	if (ret != 0)
	return ret;
	}

	if (!ret \|\| (c->focus_auto->is_new && c->focus_auto->val) \|\|
	c->af_start->is_new)
	ret = s5c73m3_af_run(state, 1);
	else if ((c->focus_auto->is_new && !c->focus_auto->val) \|\|
	c->af_stop->is_new)
	ret = s5c73m3_af_run(state, 0);
	else
	ret = 0;

	return ret;
	}

	static int s5c73m3_set_contrast(struct s5c73m3 *state, int val)
	{
	u16 reg = (val < 0) ? -val + 2 : val;
	return s5c73m3_isp_command(state, COMM_CONTRAST, reg);
	}

	static int s5c73m3_set_saturation(struct s5c73m3 *state, int val)
	{
	u16 reg = (val < 0) ? -val + 2 : val;
	return s5c73m3_isp_command(state, COMM_SATURATION, reg);
	}

	static int s5c73m3_set_sharpness(struct s5c73m3 *state, int val)
	{
	u16 reg = (val < 0) ? -val + 2 : val;
	return s5c73m3_isp_command(state, COMM_SHARPNESS, reg);
	}

	static int s5c73m3_set_iso(struct s5c73m3 *state, int val)
	{
	u32 iso;

	if (val == V4L2_ISO_SENSITIVITY_MANUAL)
	iso = state->ctrls.iso->val + 1;
	else
	iso = 0;

	return s5c73m3_isp_command(state, COMM_ISO, iso);
	}

	static int s5c73m3_set_stabilization(struct s5c73m3 *state, int val)
	{
	struct v4l2_subdev *sd = &state->sensor_sd;

	v4l2_dbg(1, s5c73m3_dbg, sd, "Image stabilization: %d\n", val);

	return s5c73m3_isp_command(state, COMM_FRAME_RATE, val ?
	COMM_FRAME_RATE_ANTI_SHAKE : COMM_FRAME_RATE_AUTO_SET);
	}

	static int s5c73m3_set_jpeg_quality(struct s5c73m3 *state, int quality)
	{
	int reg;

	if (quality <= 65)
	reg = COMM_IMAGE_QUALITY_NORMAL;
	else if (quality <= 75)
	reg = COMM_IMAGE_QUALITY_FINE;
	else
	reg = COMM_IMAGE_QUALITY_SUPERFINE;

	return s5c73m3_isp_command(state, COMM_IMAGE_QUALITY, reg);
	}

	static int s5c73m3_set_scene_program(struct s5c73m3 *state, int val)
	{
	static const unsigned short scene_lookup[] = {
	COMM_SCENE_MODE_NONE, /* V4L2_SCENE_MODE_NONE */
	COMM_SCENE_MODE_AGAINST_LIGHT,/* V4L2_SCENE_MODE_BACKLIGHT */
	COMM_SCENE_MODE_BEACH, /* V4L2_SCENE_MODE_BEACH_SNOW */
	COMM_SCENE_MODE_CANDLE, /* V4L2_SCENE_MODE_CANDLE_LIGHT */
	COMM_SCENE_MODE_DAWN, /* V4L2_SCENE_MODE_DAWN_DUSK */
	COMM_SCENE_MODE_FALL, /* V4L2_SCENE_MODE_FALL_COLORS */
	COMM_SCENE_MODE_FIRE, /* V4L2_SCENE_MODE_FIREWORKS */
	COMM_SCENE_MODE_LANDSCAPE, /* V4L2_SCENE_MODE_LANDSCAPE */
	COMM_SCENE_MODE_NIGHT, /* V4L2_SCENE_MODE_NIGHT */
	COMM_SCENE_MODE_INDOOR, /* V4L2_SCENE_MODE_PARTY_INDOOR */
	COMM_SCENE_MODE_PORTRAIT, /* V4L2_SCENE_MODE_PORTRAIT */
	COMM_SCENE_MODE_SPORTS, /* V4L2_SCENE_MODE_SPORTS */
	COMM_SCENE_MODE_SUNSET, /* V4L2_SCENE_MODE_SUNSET */
	COMM_SCENE_MODE_TEXT, /* V4L2_SCENE_MODE_TEXT */
	};

	v4l2_dbg(1, s5c73m3_dbg, &state->sensor_sd, "Setting %s scene mode\n",
	v4l2_ctrl_get_menu(state->ctrls.scene_mode->id)[val]);

	return s5c73m3_isp_command(state, COMM_SCENE_MODE, scene_lookup[val]);
	}

	static int s5c73m3_set_power_line_freq(struct s5c73m3 *state, int val)
	{
	unsigned int pwr_line_freq = COMM_FLICKER_NONE;

	switch (val) {
	case V4L2_CID_POWER_LINE_FREQUENCY_DISABLED:
	pwr_line_freq = COMM_FLICKER_NONE;
	break;
	case V4L2_CID_POWER_LINE_FREQUENCY_50HZ:
	pwr_line_freq = COMM_FLICKER_AUTO_50HZ;
	break;
	case V4L2_CID_POWER_LINE_FREQUENCY_60HZ:
	pwr_line_freq = COMM_FLICKER_AUTO_60HZ;
	break;
	default:
	case V4L2_CID_POWER_LINE_FREQUENCY_AUTO:
	pwr_line_freq = COMM_FLICKER_NONE;
	}

	return s5c73m3_isp_command(state, COMM_FLICKER_MODE, pwr_line_freq);
	}

	static int s5c73m3_s_ctrl(struct v4l2_ctrl *ctrl)
	{
	struct v4l2_subdev *sd = ctrl_to_sensor_sd(ctrl);
	struct s5c73m3 *state = sensor_sd_to_s5c73m3(sd);
	int ret = 0;

	v4l2_dbg(1, s5c73m3_dbg, sd, "set_ctrl: %s, value: %d\n",
	ctrl->name, ctrl->val);

	mutex_lock(&state->lock);
	/*
	* If the device is not powered up by the host driver do
	* not apply any controls to H/W at this time. Instead
	* the controls will be restored right after power-up.
	*/
	if (state->power == 0)
	goto unlock;

	if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE) {
	ret = -EINVAL;
	goto unlock;
	}

	switch (ctrl->id) {
	case V4L2_CID_3A_LOCK:
	ret = s5c73m3_3a_lock(state, ctrl);
	break;

	case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
	ret = s5c73m3_set_white_balance(state, ctrl->val);
	break;

	case V4L2_CID_CONTRAST:
	ret = s5c73m3_set_contrast(state, ctrl->val);
	break;

	case V4L2_CID_COLORFX:
	ret = s5c73m3_set_colorfx(state, ctrl->val);
	break;

	case V4L2_CID_EXPOSURE_AUTO:
	ret = s5c73m3_set_exposure(state, ctrl->val);
	break;

	case V4L2_CID_FOCUS_AUTO:
	ret = s5c73m3_set_auto_focus(state, ctrl->val);
	break;

	case V4L2_CID_IMAGE_STABILIZATION:
	ret = s5c73m3_set_stabilization(state, ctrl->val);
	break;

	case V4L2_CID_ISO_SENSITIVITY:
	ret = s5c73m3_set_iso(state, ctrl->val);
	break;

	case V4L2_CID_JPEG_COMPRESSION_QUALITY:
	ret = s5c73m3_set_jpeg_quality(state, ctrl->val);
	break;

	case V4L2_CID_POWER_LINE_FREQUENCY:
	ret = s5c73m3_set_power_line_freq(state, ctrl->val);
	break;

	case V4L2_CID_SATURATION:
	ret = s5c73m3_set_saturation(state, ctrl->val);
	break;

	case V4L2_CID_SCENE_MODE:
	ret = s5c73m3_set_scene_program(state, ctrl->val);
	break;

	case V4L2_CID_SHARPNESS:
	ret = s5c73m3_set_sharpness(state, ctrl->val);
	break;

	case V4L2_CID_WIDE_DYNAMIC_RANGE:
	ret = s5c73m3_isp_command(state, COMM_WDR, !!ctrl->val);
	break;

	case V4L2_CID_ZOOM_ABSOLUTE:
	ret = s5c73m3_isp_command(state, COMM_ZOOM_STEP, ctrl->val);
	break;
	}
	unlock:
	mutex_unlock(&state->lock);
	return ret;
	}

	static const struct v4l2_ctrl_ops s5c73m3_ctrl_ops = {
	.g_volatile_ctrl = s5c73m3_g_volatile_ctrl,
	.s_ctrl = s5c73m3_s_ctrl,
	};

	/* Supported manual ISO values */
	static const s64 iso_qmenu[] = {
	/* COMM_ISO: 0x0001...0x0004 */
	100, 200, 400, 800,
	};

	/* Supported exposure bias values (-2.0EV...+2.0EV) */
	static const s64 ev_bias_qmenu[] = {
	/* COMM_EV: 0x0000...0x0008 */
	-2000, -1500, -1000, -500, 0, 500, 1000, 1500, 2000
	};

	int s5c73m3_init_controls(struct s5c73m3 *state)
	{
	const struct v4l2_ctrl_ops *ops = &s5c73m3_ctrl_ops;
	struct s5c73m3_ctrls *ctrls = &state->ctrls;
	struct v4l2_ctrl_handler *hdl = &ctrls->handler;

	int ret = v4l2_ctrl_handler_init(hdl, 22);
	if (ret)
	return ret;

	/* White balance */
	ctrls->auto_wb = v4l2_ctrl_new_std_menu(hdl, ops,
	V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE,
	9, ~0x15e, V4L2_WHITE_BALANCE_AUTO);

	/* Exposure (only automatic exposure) */
	ctrls->auto_exposure = v4l2_ctrl_new_std_menu(hdl, ops,
	V4L2_CID_EXPOSURE_AUTO, 0, ~0x01, V4L2_EXPOSURE_AUTO);

	ctrls->exposure_bias = v4l2_ctrl_new_int_menu(hdl, ops,
	V4L2_CID_AUTO_EXPOSURE_BIAS,
	ARRAY_SIZE(ev_bias_qmenu) - 1,
	ARRAY_SIZE(ev_bias_qmenu)/2 - 1,
	ev_bias_qmenu);

	ctrls->exposure_metering = v4l2_ctrl_new_std_menu(hdl, ops,
	V4L2_CID_EXPOSURE_METERING,
	2, ~0x7, V4L2_EXPOSURE_METERING_AVERAGE);

	/* Auto focus */
	ctrls->focus_auto = v4l2_ctrl_new_std(hdl, ops,
	V4L2_CID_FOCUS_AUTO, 0, 1, 1, 0);

	ctrls->af_start = v4l2_ctrl_new_std(hdl, ops,
	V4L2_CID_AUTO_FOCUS_START, 0, 1, 1, 0);

	ctrls->af_stop = v4l2_ctrl_new_std(hdl, ops,
	V4L2_CID_AUTO_FOCUS_STOP, 0, 1, 1, 0);

	ctrls->af_status = v4l2_ctrl_new_std(hdl, ops,
	V4L2_CID_AUTO_FOCUS_STATUS, 0,
	(V4L2_AUTO_FOCUS_STATUS_BUSY \|
	V4L2_AUTO_FOCUS_STATUS_REACHED \|
	V4L2_AUTO_FOCUS_STATUS_FAILED),
	0, V4L2_AUTO_FOCUS_STATUS_IDLE);

	ctrls->af_distance = v4l2_ctrl_new_std_menu(hdl, ops,
	V4L2_CID_AUTO_FOCUS_RANGE,
	V4L2_AUTO_FOCUS_RANGE_MACRO,
	~(1 << V4L2_AUTO_FOCUS_RANGE_NORMAL \|
	1 << V4L2_AUTO_FOCUS_RANGE_MACRO),
	V4L2_AUTO_FOCUS_RANGE_NORMAL);
	/* ISO sensitivity */
	ctrls->auto_iso = v4l2_ctrl_new_std_menu(hdl, ops,
	V4L2_CID_ISO_SENSITIVITY_AUTO, 1, 0,
	V4L2_ISO_SENSITIVITY_AUTO);

	ctrls->iso = v4l2_ctrl_new_int_menu(hdl, ops,
	V4L2_CID_ISO_SENSITIVITY, ARRAY_SIZE(iso_qmenu) - 1,
	ARRAY_SIZE(iso_qmenu)/2 - 1, iso_qmenu);

	ctrls->contrast = v4l2_ctrl_new_std(hdl, ops,
	V4L2_CID_CONTRAST, -2, 2, 1, 0);

	ctrls->saturation = v4l2_ctrl_new_std(hdl, ops,
	V4L2_CID_SATURATION, -2, 2, 1, 0);

	ctrls->sharpness = v4l2_ctrl_new_std(hdl, ops,
	V4L2_CID_SHARPNESS, -2, 2, 1, 0);

	ctrls->zoom = v4l2_ctrl_new_std(hdl, ops,
	V4L2_CID_ZOOM_ABSOLUTE, 0, 30, 1, 0);

	ctrls->colorfx = v4l2_ctrl_new_std_menu(hdl, ops, V4L2_CID_COLORFX,
	V4L2_COLORFX_AQUA, ~0x40f, V4L2_COLORFX_NONE);

	ctrls->wdr = v4l2_ctrl_new_std(hdl, ops,
	V4L2_CID_WIDE_DYNAMIC_RANGE, 0, 1, 1, 0);

	ctrls->stabilization = v4l2_ctrl_new_std(hdl, ops,
	V4L2_CID_IMAGE_STABILIZATION, 0, 1, 1, 0);

	v4l2_ctrl_new_std_menu(hdl, ops, V4L2_CID_POWER_LINE_FREQUENCY,
	V4L2_CID_POWER_LINE_FREQUENCY_AUTO, 0,
	V4L2_CID_POWER_LINE_FREQUENCY_AUTO);

	ctrls->jpeg_quality = v4l2_ctrl_new_std(hdl, ops,
	V4L2_CID_JPEG_COMPRESSION_QUALITY, 1, 100, 1, 80);

	ctrls->scene_mode = v4l2_ctrl_new_std_menu(hdl, ops,
	V4L2_CID_SCENE_MODE, V4L2_SCENE_MODE_TEXT, ~0x3fff,
	V4L2_SCENE_MODE_NONE);

	ctrls->aaa_lock = v4l2_ctrl_new_std(hdl, ops,
	V4L2_CID_3A_LOCK, 0, 0x7, 0, 0);

	if (hdl->error) {
	ret = hdl->error;
	v4l2_ctrl_handler_free(hdl);
	return ret;
	}

	v4l2_ctrl_auto_cluster(3, &ctrls->auto_exposure, 0, false);
	ctrls->auto_iso->flags \|= V4L2_CTRL_FLAG_VOLATILE \|
	V4L2_CTRL_FLAG_UPDATE;
	v4l2_ctrl_auto_cluster(2, &ctrls->auto_iso, 0, false);
	ctrls->af_status->flags \|= V4L2_CTRL_FLAG_VOLATILE;
	v4l2_ctrl_cluster(6, &ctrls->focus_auto);

	state->sensor_sd.ctrl_handler = hdl;

	return 0;
	}