/*
 * imx185.c - imx185 sensor driver
 *
 * Copyright (c) 2016-2020, NVIDIA CORPORATION.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/gpio.h>
#include <linux/module.h>
#include <linux/seq_file.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>

#include <media/tegra_v4l2_camera.h>
#include <media/tegracam_core.h>
#include "imx185_mode_tbls.h"
#define CREATE_TRACE_POINTS
#include <trace/events/imx185.h>

#define IMX185_MIN_FRAME_LENGTH	(1125)
#define IMX185_MAX_FRAME_LENGTH	(0x1FFFF)
#define IMX185_MIN_SHS1_1080P_HDR	(5)
#define IMX185_MIN_SHS2_1080P_HDR	(82)
#define IMX185_MAX_SHS2_1080P_HDR	(IMX185_MAX_FRAME_LENGTH - 5)
#define IMX185_MAX_SHS1_1080P_HDR	(IMX185_MAX_SHS2_1080P_HDR / 16)

#define IMX185_FRAME_LENGTH_ADDR_MSB		0x301A
#define IMX185_FRAME_LENGTH_ADDR_MID		0x3019
#define IMX185_FRAME_LENGTH_ADDR_LSB		0x3018
#define IMX185_COARSE_TIME_SHS1_ADDR_MSB	0x3022
#define IMX185_COARSE_TIME_SHS1_ADDR_MID	0x3021
#define IMX185_COARSE_TIME_SHS1_ADDR_LSB	0x3020
#define IMX185_COARSE_TIME_SHS2_ADDR_MSB	0x3025
#define IMX185_COARSE_TIME_SHS2_ADDR_MID	0x3024
#define IMX185_COARSE_TIME_SHS2_ADDR_LSB	0x3023
#define IMX185_GAIN_ADDR					0x3014
#define IMX185_GROUP_HOLD_ADDR				0x3001
#define IMX185_SW_RESET_ADDR			0x3003
#define IMX185_ANALOG_GAIN_LIMIT_ADDR			0x3012
#define IMX185_ANALOG_GAIN_LIMIT_VALUE			0x0f


#define IMX185_FUSE_ID_ADDR	0x3382
#define IMX185_FUSE_ID_SIZE	6
#define IMX185_FUSE_ID_STR_SIZE	(IMX185_FUSE_ID_SIZE * 2)

static const struct of_device_id imx185_of_match[] = {
	{ .compatible = "nvidia,imx185",},
	{ },
};
MODULE_DEVICE_TABLE(of, imx185_of_match);

static const u32 ctrl_cid_list[] = {
	TEGRA_CAMERA_CID_GAIN,
	TEGRA_CAMERA_CID_EXPOSURE,
	TEGRA_CAMERA_CID_FRAME_RATE,
	TEGRA_CAMERA_CID_FUSE_ID,
	TEGRA_CAMERA_CID_HDR_EN,
	TEGRA_CAMERA_CID_SENSOR_MODE_ID,
};

struct imx185 {
	struct i2c_client	*i2c_client;
	struct v4l2_subdev	*subdev;
	u8 fuse_id[IMX185_FUSE_ID_SIZE];
	u32				frame_length;
	s64 last_wdr_et_val;
	struct camera_common_data	*s_data;
	struct tegracam_device		*tc_dev;
};

static const struct regmap_config sensor_regmap_config = {
	.reg_bits = 16,
	.val_bits = 8,
	.cache_type = REGCACHE_RBTREE,
	.use_single_rw = true,
};

static inline void imx185_get_frame_length_regs(imx185_reg *regs,
				u32 frame_length)
{
	regs->addr = IMX185_FRAME_LENGTH_ADDR_MSB;
	regs->val = (frame_length >> 16) & 0x01;

	(regs + 1)->addr = IMX185_FRAME_LENGTH_ADDR_MID;
	(regs + 1)->val = (frame_length >> 8) & 0xff;

	(regs + 2)->addr = IMX185_FRAME_LENGTH_ADDR_LSB;
	(regs + 2)->val = (frame_length) & 0xff;
}

static inline void imx185_get_coarse_time_regs_shs1(imx185_reg *regs,
				u32 coarse_time)
{
	regs->addr = IMX185_COARSE_TIME_SHS1_ADDR_MSB;
	regs->val = (coarse_time >> 16) & 0x01;

	(regs + 1)->addr = IMX185_COARSE_TIME_SHS1_ADDR_MID;
	(regs + 1)->val = (coarse_time >> 8) & 0xff;

	(regs + 2)->addr = IMX185_COARSE_TIME_SHS1_ADDR_LSB;
	(regs + 2)->val = (coarse_time) & 0xff;

}

static inline void imx185_get_coarse_time_regs_shs2(imx185_reg *regs,
				u32 coarse_time)
{
	regs->addr = IMX185_COARSE_TIME_SHS2_ADDR_MSB;
	regs->val = (coarse_time >> 16) & 0x01;

	(regs + 1)->addr = IMX185_COARSE_TIME_SHS2_ADDR_MID;
	(regs + 1)->val = (coarse_time >> 8) & 0xff;

	(regs + 2)->addr = IMX185_COARSE_TIME_SHS2_ADDR_LSB;
	(regs + 2)->val = (coarse_time) & 0xff;

}

static inline void imx185_get_gain_reg(imx185_reg *regs,
				u8 gain)
{
	regs->addr = IMX185_GAIN_ADDR;
	regs->val = (gain) & 0xff;
}

static int test_mode;
module_param(test_mode, int, 0644);

static inline int imx185_read_reg(struct camera_common_data *s_data,
				u16 addr, u8 *val)
{
	int err = 0;
	u32 reg_val = 0;

	err = regmap_read(s_data->regmap, addr, &reg_val);
	*val = reg_val & 0xFF;

	return err;
}

static int imx185_write_reg(struct camera_common_data *s_data,
				u16 addr, u8 val)
{
	int err;
	struct device *dev = s_data->dev;

	err = regmap_write(s_data->regmap, addr, val);
	if (err)
		dev_err(dev, "%s: i2c write failed, 0x%x = %x\n",
			__func__, addr, val);

	return err;
}

static int imx185_write_table(struct imx185 *priv,
				const imx185_reg table[])
{
	struct camera_common_data *s_data = priv->s_data;

	return regmap_util_write_table_8(s_data->regmap,
					 table,
					 NULL, 0,
					 IMX185_TABLE_WAIT_MS,
					 IMX185_TABLE_END);
}

static int imx185_set_group_hold(struct tegracam_device *tc_dev, bool val)
{
	struct camera_common_data *s_data = tc_dev->s_data;
	struct device *dev = tc_dev->dev;
	int err;

	err = imx185_write_reg(s_data,
				IMX185_GROUP_HOLD_ADDR, val);
	if (err) {
		dev_dbg(dev,
			"%s: Group hold control error\n", __func__);
		return err;
	}

	return 0;
}

static int imx185_set_gain(struct tegracam_device *tc_dev, s64 val)
{
	struct camera_common_data *s_data = tc_dev->s_data;
	struct imx185 *priv = (struct imx185 *)tc_dev->priv;
	struct device *dev = tc_dev->dev;
	const struct sensor_mode_properties *mode =
		&s_data->sensor_props.sensor_modes[s_data->mode_prop_idx];
	imx185_reg reg_list[1];
	int err;
	u8 gain;

	/* translate value */
	gain = (u8) (val * 160 / (48 * mode->control_properties.gain_factor));
	dev_dbg(dev, "%s:  gain reg: %d\n",  __func__, gain);

	imx185_get_gain_reg(reg_list, gain);

	err = imx185_write_reg(priv->s_data, reg_list[0].addr,
		 reg_list[0].val);
	if (err)
		goto fail;

	return 0;

fail:
	dev_dbg(dev, "%s: GAIN control error\n", __func__);
	return err;
}

static int imx185_set_coarse_time(struct imx185 *priv, s64 val)
{
	struct camera_common_data *s_data = priv->s_data;
	const struct sensor_mode_properties *mode =
		&s_data->sensor_props.sensor_modes[s_data->mode];
	struct device *dev = &priv->i2c_client->dev;
	imx185_reg reg_list[3];
	int err;
	u32 coarse_time_shs1;
	u32 reg_shs1;
	int i = 0;

	coarse_time_shs1 = mode->signal_properties.pixel_clock.val *
		val / mode->image_properties.line_length /
		mode->control_properties.exposure_factor;

	if (priv->frame_length == 0)
		priv->frame_length = IMX185_MIN_FRAME_LENGTH;

	reg_shs1 = priv->frame_length - coarse_time_shs1 - 1;

	dev_dbg(dev, "%s: coarse1:%d, shs1:%d, FL:%d\n", __func__,
		 coarse_time_shs1, reg_shs1, priv->frame_length);

	imx185_get_coarse_time_regs_shs1(reg_list, reg_shs1);

	for (i = 0; i < 3; i++) {
		err = imx185_write_reg(priv->s_data, reg_list[i].addr,
			 reg_list[i].val);
		if (err)
			goto fail;
	}

	return 0;

fail:
	dev_dbg(dev, "%s: set coarse time error\n", __func__);
	return err;
}

static int imx185_set_coarse_time_hdr(struct imx185 *priv, s64 val)
{
	struct device *dev = &priv->i2c_client->dev;
	struct camera_common_data *s_data = priv->s_data;
	const struct sensor_mode_properties *mode =
		&s_data->sensor_props.sensor_modes[s_data->mode];
	imx185_reg reg_list_shs1[3];
	imx185_reg reg_list_shs2[3];
	u32 coarse_time_shs1;
	u32 coarse_time_shs2;
	u32 reg_shs1;
	u32 reg_shs2;
	int err;
	int i = 0;

	if (priv->frame_length == 0)
		priv->frame_length = IMX185_MIN_FRAME_LENGTH;

	priv->last_wdr_et_val = val;

	/*WDR, update SHS1 as short ET, and SHS2 is 16x of short*/
	coarse_time_shs1 = mode->signal_properties.pixel_clock.val *
		val / mode->image_properties.line_length /
		mode->control_properties.exposure_factor / 16;
	if (coarse_time_shs1 < IMX185_MIN_SHS1_1080P_HDR)
		coarse_time_shs1 = IMX185_MIN_SHS1_1080P_HDR;
	if (coarse_time_shs1 > IMX185_MAX_SHS1_1080P_HDR)
		coarse_time_shs1 = IMX185_MAX_SHS1_1080P_HDR;

	coarse_time_shs2 = (coarse_time_shs1 - IMX185_MIN_SHS1_1080P_HDR) * 16 +
				IMX185_MIN_SHS2_1080P_HDR;

	reg_shs1 = priv->frame_length - coarse_time_shs1 - 1;
	reg_shs2 = priv->frame_length - coarse_time_shs2 - 1;

	imx185_get_coarse_time_regs_shs1(reg_list_shs1, reg_shs1);
	imx185_get_coarse_time_regs_shs2(reg_list_shs2, reg_shs2);

	dev_dbg(dev, "%s: coarse1:%d, shs1:%d, coarse2:%d, shs2: %d, FL:%d\n",
		__func__,
		 coarse_time_shs1, reg_shs1,
		 coarse_time_shs2, reg_shs2,
		 priv->frame_length);

	for (i = 0; i < 3; i++) {
		err = imx185_write_reg(priv->s_data, reg_list_shs1[i].addr,
			 reg_list_shs1[i].val);
		if (err)
			goto fail;

		err = imx185_write_reg(priv->s_data, reg_list_shs2[i].addr,
			 reg_list_shs2[i].val);
		if (err)
			goto fail;
	}

	return 0;

fail:
	dev_dbg(dev, "%s: set WDR coarse time error\n", __func__);
	return err;
}

static int imx185_set_frame_rate(struct tegracam_device *tc_dev, s64 val)
{
	struct camera_common_data *s_data = tc_dev->s_data;
	struct imx185 *priv = (struct imx185 *)tc_dev->priv;
	struct device *dev = tc_dev->dev;
	imx185_reg reg_list[3];
	int err;
	u32 frame_length;
	const struct sensor_mode_properties *mode =
		&s_data->sensor_props.sensor_modes[s_data->mode_prop_idx];
	struct v4l2_control control;
	int hdr_en;
	int i = 0;

	frame_length = mode->signal_properties.pixel_clock.val *
		mode->control_properties.framerate_factor /
		mode->image_properties.line_length / val;

	priv->frame_length = frame_length;
	if (priv->frame_length > IMX185_MAX_FRAME_LENGTH)
		priv->frame_length = IMX185_MAX_FRAME_LENGTH;

	dev_dbg(dev, "%s: val: %lld, , frame_length: %d\n", __func__,
		val, priv->frame_length);

	imx185_get_frame_length_regs(reg_list, priv->frame_length);

	for (i = 0; i < 3; i++) {
		err = imx185_write_reg(priv->s_data, reg_list[i].addr,
			 reg_list[i].val);
		if (err)
			goto fail;
	}

	/* check hdr enable ctrl */
	control.id = TEGRA_CAMERA_CID_HDR_EN;
	err = camera_common_g_ctrl(s_data, &control);
	if (err < 0) {
		dev_err(dev, "could not find device ctrl.\n");
		return err;
	}

	hdr_en = switch_ctrl_qmenu[control.value];
	if ((hdr_en == SWITCH_ON) && (priv->last_wdr_et_val != 0)) {
		err = imx185_set_coarse_time_hdr(priv, priv->last_wdr_et_val);
		if (err)
			dev_dbg(dev,
			"%s: error coarse time SHS1 SHS2 override\n", __func__);
	}

	return 0;

fail:
	dev_dbg(dev, "%s: FRAME_LENGTH control error\n", __func__);
	return err;
}

static int imx185_set_exposure(struct tegracam_device *tc_dev, s64 val)
{
	struct camera_common_data *s_data = tc_dev->s_data;
	struct imx185 *priv = (struct imx185 *)tc_dev->priv;
	struct device *dev = tc_dev->dev;
	int err;
	struct v4l2_control control;
	int hdr_en;

	dev_dbg(dev, "%s: val: %lld\n", __func__, val);

	/* check hdr enable ctrl */
	control.id = TEGRA_CAMERA_CID_HDR_EN;
	err = camera_common_g_ctrl(s_data, &control);
	if (err < 0) {
		dev_err(dev, "could not find device ctrl.\n");
		return err;
	}

	hdr_en = switch_ctrl_qmenu[control.value];
	if (hdr_en == SWITCH_ON) {
		err = imx185_set_coarse_time_hdr(priv, val);
		if (err)
			dev_dbg(dev,
			"%s: error coarse time SHS1 SHS2 override\n", __func__);
	} else {
		err = imx185_set_coarse_time(priv, val);
		if (err)
			dev_dbg(dev,
			"%s: error coarse time SHS1 override\n", __func__);
	}

	return err;
}

static int imx185_fill_string_ctrl(struct tegracam_device *tc_dev,
				struct v4l2_ctrl *ctrl)
{
	struct imx185 *priv = tc_dev->priv;
	int i;

	switch (ctrl->id) {
	case TEGRA_CAMERA_CID_FUSE_ID:
		for (i = 0; i < IMX185_FUSE_ID_SIZE; i++)
			sprintf(&ctrl->p_new.p_char[i*2], "%02x",
				priv->fuse_id[i]);
		break;
	default:
		return -EINVAL;
	}

	ctrl->p_cur.p_char = ctrl->p_new.p_char;

	return 0;
}

static struct tegracam_ctrl_ops imx185_ctrl_ops = {
	.numctrls = ARRAY_SIZE(ctrl_cid_list),
	.ctrl_cid_list = ctrl_cid_list,
	.string_ctrl_size = {0, IMX185_FUSE_ID_STR_SIZE},
	.set_gain = imx185_set_gain,
	.set_exposure = imx185_set_exposure,
	.set_frame_rate = imx185_set_frame_rate,
	.set_group_hold = imx185_set_group_hold,
	.fill_string_ctrl = imx185_fill_string_ctrl,
};

static int imx185_power_on(struct camera_common_data *s_data)
{
	int err = 0;
	struct camera_common_power_rail *pw = s_data->power;
	struct camera_common_pdata *pdata = s_data->pdata;
	struct device *dev = s_data->dev;

	dev_dbg(dev, "%s: power on\n", __func__);
	if (pdata && pdata->power_on) {
		err = pdata->power_on(pw);
		if (err)
			dev_err(dev, "%s failed.\n", __func__);
		else
			pw->state = SWITCH_ON;
		return err;
	}

	/*exit reset mode: XCLR */
	if (pw->reset_gpio) {
		gpio_set_value(pw->reset_gpio, 0);
		usleep_range(30, 50);
		gpio_set_value(pw->reset_gpio, 1);
		usleep_range(30, 50);
	}

	pw->state = SWITCH_ON;
	return 0;

}

static int imx185_power_off(struct camera_common_data *s_data)
{
	int err = 0;
	struct camera_common_power_rail *pw = s_data->power;
	struct camera_common_pdata *pdata = s_data->pdata;
	struct device *dev = s_data->dev;

	dev_dbg(dev, "%s: power off\n", __func__);

	if (pdata && pdata->power_off) {
		err = pdata->power_off(pw);
		if (!err)
			goto power_off_done;
		else
			dev_err(dev, "%s failed.\n", __func__);
		return err;
	}
	/* enter reset mode: XCLR */
	usleep_range(1, 2);
	if (pw->reset_gpio)
		gpio_set_value(pw->reset_gpio, 0);

power_off_done:
	pw->state = SWITCH_OFF;

	return 0;
}

static int imx185_power_get(struct tegracam_device *tc_dev)
{
	struct device *dev = tc_dev->dev;
	struct camera_common_data *s_data = tc_dev->s_data;
	struct camera_common_power_rail *pw = s_data->power;
	struct camera_common_pdata *pdata = s_data->pdata;
	const char *mclk_name;
	struct clk *parent;
	int err = 0;

	mclk_name = pdata->mclk_name ?
		    pdata->mclk_name : "extperiph1";
	pw->mclk = devm_clk_get(dev, mclk_name);
	if (IS_ERR(pw->mclk)) {
		dev_err(dev, "unable to get clock %s\n", mclk_name);
		return PTR_ERR(pw->mclk);
	}

	parent = devm_clk_get(dev, "pllp_grtba");
	if (IS_ERR(parent))
		dev_err(dev, "devm_clk_get failed for pllp_grtba");
	else
		clk_set_parent(pw->mclk, parent);

	pw->reset_gpio = pdata->reset_gpio;

	pw->state = SWITCH_OFF;
	return err;
}

static int imx185_power_put(struct tegracam_device *tc_dev)
{
	struct camera_common_data *s_data = tc_dev->s_data;
	struct camera_common_power_rail *pw = s_data->power;

	if (unlikely(!pw))
		return -EFAULT;

	return 0;
}

static struct camera_common_pdata *imx185_parse_dt(struct tegracam_device *tc_dev)
{
	struct device *dev = tc_dev->dev;
	struct device_node *np = dev->of_node;
	struct camera_common_pdata *board_priv_pdata;
	const struct of_device_id *match;
	struct camera_common_pdata *ret = NULL;
	int err;
	int gpio;

	if (!np)
		return NULL;

	match = of_match_device(imx185_of_match, dev);
	if (!match) {
		dev_err(dev, "Failed to find matching dt id\n");
		return NULL;
	}

	board_priv_pdata = devm_kzalloc(dev,
					sizeof(*board_priv_pdata), GFP_KERNEL);
	if (!board_priv_pdata)
		return NULL;

	err = of_property_read_string(np, "mclk",
				      &board_priv_pdata->mclk_name);
	if (err)
		dev_err(dev, "mclk not in DT\n");

	gpio = of_get_named_gpio(np, "reset-gpios", 0);
	if (gpio < 0) {
		if (gpio == -EPROBE_DEFER)
			ret = ERR_PTR(-EPROBE_DEFER);
		dev_err(dev, "reset-gpios not found %d\n", err);
		goto error;
	}
	board_priv_pdata->reset_gpio = (unsigned int)gpio;

	return board_priv_pdata;

error:
	devm_kfree(dev, board_priv_pdata);
	return ret;
}

static int imx185_set_mode(struct tegracam_device *tc_dev)
{
	struct imx185 *priv = (struct imx185 *)tegracam_get_privdata(tc_dev);
	struct camera_common_data *s_data = tc_dev->s_data;
	struct device *dev = tc_dev->dev;
	struct device_node *np = dev->of_node;
	bool limit_analog_gain = false;
	const struct of_device_id *match;
	int err;

	match = of_match_device(imx185_of_match, dev);
	if (!match) {
		dev_err(dev, "Failed to find matching dt id\n");
		return -EINVAL;
	}

	limit_analog_gain = of_property_read_bool(np, "limit_analog_gain");

	err = imx185_write_table(priv, mode_table[s_data->mode_prop_idx]);
	if (err)
		return err;

	if (limit_analog_gain) {
		err = imx185_write_reg(priv->s_data,
			IMX185_ANALOG_GAIN_LIMIT_ADDR,
			IMX185_ANALOG_GAIN_LIMIT_VALUE);
		if (err)
			return err;
	}

	return 0;
}

static int imx185_start_streaming(struct tegracam_device *tc_dev)
{
	struct imx185 *priv = (struct imx185 *)tegracam_get_privdata(tc_dev);
	int err;

	if (test_mode) {
		err = imx185_write_table(priv,
			mode_table[IMX185_MODE_TEST_PATTERN]);
		if (err)
			return err;
	}

	err = imx185_write_table(priv,
		mode_table[IMX185_MODE_START_STREAM]);
	if (err)
		return err;

	return 0;
}

static int imx185_stop_streaming(struct tegracam_device *tc_dev)
{
	struct camera_common_data *s_data = tc_dev->s_data;
	struct imx185 *priv = (struct imx185 *)tegracam_get_privdata(tc_dev);
	int err;

	err = imx185_write_table(priv, mode_table[IMX185_MODE_STOP_STREAM]);
	if (err)
		return err;

	/* SW_RESET will have no ACK */
	imx185_write_reg(s_data, IMX185_SW_RESET_ADDR, 0x01);

	/*
	 * Wait for one frame to make sure sensor is set to
	 * software standby in V-blank
	 *
	 * delay = frame length rows * Tline (10 us)
	 */
	usleep_range(priv->frame_length * 10, priv->frame_length * 10 + 1000);

	return 0;
}


static struct camera_common_sensor_ops imx185_common_ops = {
	.numfrmfmts = ARRAY_SIZE(imx185_frmfmt),
	.frmfmt_table = imx185_frmfmt,
	.power_on = imx185_power_on,
	.power_off = imx185_power_off,
	.write_reg = imx185_write_reg,
	.read_reg = imx185_read_reg,
	.parse_dt = imx185_parse_dt,
	.power_get = imx185_power_get,
	.power_put = imx185_power_put,
	.set_mode = imx185_set_mode,
	.start_streaming = imx185_start_streaming,
	.stop_streaming = imx185_stop_streaming,
};

static int imx185_fuse_id_setup(struct imx185 *priv)
{
	int err = 0;
	int i;
	struct camera_common_data *s_data = priv->s_data;
	struct device *dev = s_data->dev;
	u8 bak = 0;

	for (i = 0; i < IMX185_FUSE_ID_SIZE; i++) {
		err |= imx185_read_reg(s_data,
			IMX185_FUSE_ID_ADDR + i, &bak);
		if (!err)
			priv->fuse_id[i] = bak;
		else {
			dev_err(dev, "%s: can not read fuse id\n", __func__);
			return -EINVAL;
		}
	}

	return 0;
}

static int imx185_board_setup(struct imx185 *priv)
{
	struct camera_common_data *s_data = priv->s_data;
	struct device *dev = s_data->dev;
	int err = 0;

	dev_dbg(dev, "%s++\n", __func__);

	err = camera_common_mclk_enable(s_data);
	if (err) {
		dev_err(dev,
			"Error %d turning on mclk\n", err);
		return err;
	}

	err = imx185_power_on(s_data);
	if (err) {
		dev_err(dev,
			"Error %d during power on sensor\n", err);
		return err;
	}

	err = imx185_fuse_id_setup(priv);
	if (err) {
		dev_err(dev,
			"Error %d reading fuse id data\n", err);
		goto error;
	}

error:
	imx185_power_off(s_data);
	camera_common_mclk_disable(s_data);
	return err;
}

static int imx185_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	dev_dbg(&client->dev, "%s:\n", __func__);

	return 0;
}

static const struct v4l2_subdev_internal_ops imx185_subdev_internal_ops = {
	.open = imx185_open,
};

static int imx185_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
{
	struct device *dev = &client->dev;
	struct tegracam_device *tc_dev;
	struct imx185 *priv;
	int err;

	dev_info(dev, "probing v4l2 sensor\n");

	if (!IS_ENABLED(CONFIG_OF) || !client->dev.of_node)
		return -EINVAL;

	priv = devm_kzalloc(dev,
			sizeof(struct imx185), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	tc_dev = devm_kzalloc(dev,
			sizeof(struct tegracam_device), GFP_KERNEL);
	if (!tc_dev)
		return -ENOMEM;

	priv->i2c_client = tc_dev->client = client;
	tc_dev->dev = dev;
	strncpy(tc_dev->name, "imx185", sizeof(tc_dev->name));
	tc_dev->dev_regmap_config = &sensor_regmap_config;
	tc_dev->sensor_ops = &imx185_common_ops;
	tc_dev->v4l2sd_internal_ops = &imx185_subdev_internal_ops;
	tc_dev->tcctrl_ops = &imx185_ctrl_ops;

	err = tegracam_device_register(tc_dev);
	if (err) {
		dev_err(dev, "tegra camera driver registration failed\n");
		return err;
	}
	priv->tc_dev = tc_dev;
	priv->s_data = tc_dev->s_data;
	priv->subdev = &tc_dev->s_data->subdev;
	tegracam_set_privdata(tc_dev, (void *)priv);

	err = imx185_board_setup(priv);
	if (err) {
		tegracam_device_unregister(tc_dev);
		dev_err(dev, "board setup failed\n");
		return err;
	}

	err = tegracam_v4l2subdev_register(tc_dev, true);
	if (err) {
		dev_err(dev, "tegra camera subdev registration failed\n");
		return err;
	}

	dev_info(dev, "Detected IMX185 sensor\n");

	return 0;
}

static int
imx185_remove(struct i2c_client *client)
{
	struct camera_common_data *s_data = to_camera_common_data(&client->dev);
	struct imx185 *priv = (struct imx185 *)s_data->priv;

	tegracam_v4l2subdev_unregister(priv->tc_dev);
	tegracam_device_unregister(priv->tc_dev);

	return 0;
}

static const struct i2c_device_id imx185_id[] = {
	{ "imx185", 0 },
	{ }
};

MODULE_DEVICE_TABLE(i2c, imx185_id);

static struct i2c_driver imx185_i2c_driver = {
	.driver = {
		.name = "imx185",
		.owner = THIS_MODULE,
		.of_match_table = of_match_ptr(imx185_of_match),
	},
	.probe = imx185_probe,
	.remove = imx185_remove,
	.id_table = imx185_id,
};

module_i2c_driver(imx185_i2c_driver);

MODULE_DESCRIPTION("Media Controller driver for Sony IMX185");
MODULE_AUTHOR("NVIDIA Corporation");
MODULE_LICENSE("GPL v2");