/*
 * Support for Sony imx 8MP camera sensor.
 *
 * Copyright (c) 2012 Intel Corporation. All Rights Reserved.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 *
 */
#include <asm/intel-mid.h>
#include "../../include/linux/atomisp_platform.h"
#include <linux/bitops.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/gpio.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include "../../include/linux/libmsrlisthelper.h"
#include <linux/mm.h>
#include <linux/kmod.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include "imx.h"

/*
 * The imx135 embedded data info:
 * embedded data line num: 2
 * line 0 effective data size(byte): 76
 * line 1 effective data size(byte): 113
 */
static const uint32_t
        imx135_embedded_effective_size[IMX135_EMBEDDED_DATA_LINE_NUM]
        =  {76, 113};

static enum atomisp_bayer_order imx_bayer_order_mapping[] = {
        atomisp_bayer_order_rggb,
        atomisp_bayer_order_grbg,
        atomisp_bayer_order_gbrg,
        atomisp_bayer_order_bggr
};

static const unsigned int
IMX227_BRACKETING_LUT_FRAME_ENTRY[IMX_MAX_AE_LUT_LENGTH] = {
        0x0E10, 0x0E1E, 0x0E2C, 0x0E3A, 0x0E48};

static int
imx_read_reg(struct i2c_client *client, u16 len, u16 reg, u16 *val)
{
        struct i2c_msg msg[2];
        u16 data[IMX_SHORT_MAX];
        int ret, i;
        int retry = 0;

        if (len > IMX_BYTE_MAX) {
                dev_err(&client->dev, "%s error, invalid data length\n",
                        __func__);
                return -EINVAL;
        }

        do {
                memset(msg, 0 , sizeof(msg));
                memset(data, 0 , sizeof(data));

                msg[0].addr = client->addr;
                msg[0].flags = 0;
                msg[0].len = I2C_MSG_LENGTH;
                msg[0].buf = (u8 *)data;
                /* high byte goes first */
                data[0] = cpu_to_be16(reg);

                msg[1].addr = client->addr;
                msg[1].len = len;
                msg[1].flags = I2C_M_RD;
                msg[1].buf = (u8 *)data;

                ret = i2c_transfer(client->adapter, msg, 2);
                if (ret != 2) {
                        dev_err(&client->dev,
                          "retrying i2c read from offset 0x%x error %d... %d\n",
                          reg, ret, retry);
                        msleep(20);
                }
        } while (ret != 2 && retry++ < I2C_RETRY_COUNT);

        if (ret != 2)
                return -EIO;

        /* high byte comes first */
        if (len == IMX_8BIT) {
                *val = (u8)data[0];
        } else {
                /* 16-bit access is default when len > 1 */
                for (i = 0; i < (len >> 1); i++)
                        val[i] = be16_to_cpu(data[i]);
        }

        return 0;
}

static int imx_i2c_write(struct i2c_client *client, u16 len, u8 *data)
{
        struct i2c_msg msg;
        int ret;
        int retry = 0;

        do {
                msg.addr = client->addr;
                msg.flags = 0;
                msg.len = len;
                msg.buf = data;

                ret = i2c_transfer(client->adapter, &msg, 1);
                if (ret != 1) {
                        dev_err(&client->dev,
                                "retrying i2c write transfer... %d\n", retry);
                                msleep(20);
                }
        } while (ret != 1 && retry++ < I2C_RETRY_COUNT);

        return ret == 1 ? 0 : -EIO;
}

int
imx_write_reg(struct i2c_client *client, u16 data_length, u16 reg, u16 val)
{
        int ret;
        unsigned char data[4] = {0};
        u16 *wreg = (u16 *)data;
        const u16 len = data_length + sizeof(u16); /* 16-bit address + data */

        if (data_length != IMX_8BIT && data_length != IMX_16BIT) {
                v4l2_err(client, "%s error, invalid data_length\n", __func__);
                return -EINVAL;
        }

        /* high byte goes out first */
        *wreg = cpu_to_be16(reg);

        if (data_length == IMX_8BIT)
                data[2] = (u8)(val);
        else {
                /* IMX_16BIT */
                u16 *wdata = (u16 *)&data[2];
                *wdata = cpu_to_be16(val);
        }

        ret = imx_i2c_write(client, len, data);
        if (ret)
                dev_err(&client->dev,
                        "write error: wrote 0x%x to offset 0x%x error %d",
                        val, reg, ret);

        return ret;
}

/*
 * imx_write_reg_array - Initializes a list of imx registers
 * @client: i2c driver client structure
 * @reglist: list of registers to be written
 *
 * This function initializes a list of registers. When consecutive addresses
 * are found in a row on the list, this function creates a buffer and sends
 * consecutive data in a single i2c_transfer().
 *
 * __imx_flush_reg_array, __imx_buf_reg_array() and
 * __imx_write_reg_is_consecutive() are internal functions to
 * imx_write_reg_array_fast() and should be not used anywhere else.
 *
 */

static int __imx_flush_reg_array(struct i2c_client *client,
                                     struct imx_write_ctrl *ctrl)
{
        u16 size;

        if (ctrl->index == 0)
                return 0;

        size = sizeof(u16) + ctrl->index; /* 16-bit address + data */
        ctrl->buffer.addr = cpu_to_be16(ctrl->buffer.addr);
        ctrl->index = 0;

        return imx_i2c_write(client, size, (u8 *)&ctrl->buffer);
}

static int __imx_buf_reg_array(struct i2c_client *client,
                                   struct imx_write_ctrl *ctrl,
                                   const struct imx_reg *next)
{
        int size;
        u16 *data16;

        switch (next->type) {
        case IMX_8BIT:
                size = 1;
                ctrl->buffer.data[ctrl->index] = (u8)next->val;
                break;
        case IMX_16BIT:
                size = 2;
                data16 = (u16 *)&ctrl->buffer.data[ctrl->index];
                *data16 = cpu_to_be16((u16)next->val);
                break;
        default:
                return -EINVAL;
        }

        /* When first item is added, we need to store its starting address */
        if (ctrl->index == 0)
                ctrl->buffer.addr = next->sreg;

        ctrl->index += size;

        /*
         * Buffer cannot guarantee free space for u32? Better flush it to avoid
         * possible lack of memory for next item.
         */
        if (ctrl->index + sizeof(u16) >= IMX_MAX_WRITE_BUF_SIZE)
                return __imx_flush_reg_array(client, ctrl);

        return 0;
}

static int
__imx_write_reg_is_consecutive(struct i2c_client *client,
                                   struct imx_write_ctrl *ctrl,
                                   const struct imx_reg *next)
{
        if (ctrl->index == 0)
                return 1;

        return ctrl->buffer.addr + ctrl->index == next->sreg;
}

static int imx_write_reg_array(struct i2c_client *client,
                                   const struct imx_reg *reglist)
{
        const struct imx_reg *next = reglist;
        struct imx_write_ctrl ctrl;
        int err;

        ctrl.index = 0;
        for (; next->type != IMX_TOK_TERM; next++) {
                switch (next->type & IMX_TOK_MASK) {
                case IMX_TOK_DELAY:
                        err = __imx_flush_reg_array(client, &ctrl);
                        if (err)
                                return err;
                        msleep(next->val);
                        break;

                default:
                        /*
                         * If next address is not consecutive, data needs to be
                         * flushed before proceed.
                         */
                        if (!__imx_write_reg_is_consecutive(client, &ctrl,
                                                                next)) {
                                err = __imx_flush_reg_array(client, &ctrl);
                                if (err)
                                        return err;
                        }
                        err = __imx_buf_reg_array(client, &ctrl, next);
                        if (err) {
                                v4l2_err(client, "%s: write error, aborted\n",
                                         __func__);
                                return err;
                        }
                        break;
                }
        }

        return __imx_flush_reg_array(client, &ctrl);
}

static int __imx_min_fps_diff(int fps, const struct imx_fps_setting *fps_list)
{
        int diff = INT_MAX;
        int i;

        if (fps == 0)
                return 0;

        for (i = 0; i < MAX_FPS_OPTIONS_SUPPORTED; i++) {
                if (!fps_list[i].fps)
                        break;
                if (abs(fps_list[i].fps - fps) < diff)
                        diff = abs(fps_list[i].fps - fps);
        }

        return diff;
}

static int __imx_nearest_fps_index(int fps,
                                        const struct imx_fps_setting *fps_list)
{
        int fps_index = 0;
        int i;

        for (i = 0; i < MAX_FPS_OPTIONS_SUPPORTED; i++) {
                if (!fps_list[i].fps)
                        break;
                if (abs(fps_list[i].fps - fps)
                    < abs(fps_list[fps_index].fps - fps))
                        fps_index = i;
        }
        return fps_index;
}

/*
 * This is to choose the nearest fps setting above the requested fps
 * fps_list should be in ascendant order.
 */
static int __imx_above_nearest_fps_index(int fps,
                                        const struct imx_fps_setting *fps_list)
{
        int fps_index = 0;
        int i;

        for (i = 0; i < MAX_FPS_OPTIONS_SUPPORTED; i++) {
                if (!fps_list[i].fps)
                        break;
                if (fps <= fps_list[i].fps) {
                        fps_index = i;
                        break;
                }
        }

        return fps_index;
}

static int imx_get_lanes(struct v4l2_subdev *sd)
{
        struct camera_mipi_info *imx_info = v4l2_get_subdev_hostdata(sd);

        if (!imx_info)
                return -ENOSYS;
        if (imx_info->num_lanes < 1 || imx_info->num_lanes > 4 ||
            imx_info->num_lanes == 3)
                return -EINVAL;

        return imx_info->num_lanes;
}

static int __imx_update_exposure_timing(struct i2c_client *client, u16 exposure,
                        u16 llp, u16 fll)
{
        struct v4l2_subdev *sd = i2c_get_clientdata(client);
        struct imx_device *dev = to_imx_sensor(sd);
        int ret = 0;

        if (dev->sensor_id != IMX227_ID) {
                /* Increase the VTS to match exposure + margin */
                if (exposure > fll - IMX_INTEGRATION_TIME_MARGIN)
                        fll = exposure + IMX_INTEGRATION_TIME_MARGIN;
        }

        ret = imx_write_reg(client, IMX_16BIT,
                dev->reg_addr->line_length_pixels, llp);
        if (ret)
                return ret;

        ret = imx_write_reg(client, IMX_16BIT,
                dev->reg_addr->frame_length_lines, fll);
        if (ret)
                return ret;

        if (exposure)
                ret = imx_write_reg(client, IMX_16BIT,
                        dev->reg_addr->coarse_integration_time, exposure);

        return ret;
}

static int __imx_update_gain(struct v4l2_subdev *sd, u16 gain)
{
        struct imx_device *dev = to_imx_sensor(sd);
        struct i2c_client *client = v4l2_get_subdevdata(sd);
        int ret;

        /* set global gain */
        ret = imx_write_reg(client, IMX_8BIT, dev->reg_addr->global_gain, gain);
        if (ret)
                return ret;

        /* set short analog gain */
        if (dev->sensor_id == IMX135_ID)
                ret = imx_write_reg(client, IMX_8BIT, IMX_SHORT_AGC_GAIN, gain);

        return ret;
}

static int __imx_update_digital_gain(struct i2c_client *client, u16 digitgain)
{
        struct v4l2_subdev *sd = i2c_get_clientdata(client);
        struct imx_device *dev = to_imx_sensor(sd);
        struct imx_write_buffer digit_gain;

        digit_gain.addr = cpu_to_be16(dev->reg_addr->dgc_adj);
        digit_gain.data[0] = (digitgain >> 8) & 0xFF;
        digit_gain.data[1] = digitgain & 0xFF;

        if (dev->sensor_id == IMX219_ID) {
                return imx_i2c_write(client, IMX219_DGC_LEN, (u8 *)&digit_gain);
        } else if (dev->sensor_id == IMX227_ID) {
                return imx_i2c_write(client, IMX227_DGC_LEN, (u8 *)&digit_gain);
        } else {
                digit_gain.data[2] = (digitgain >> 8) & 0xFF;
                digit_gain.data[3] = digitgain & 0xFF;
                digit_gain.data[4] = (digitgain >> 8) & 0xFF;
                digit_gain.data[5] = digitgain & 0xFF;
                digit_gain.data[6] = (digitgain >> 8) & 0xFF;
                digit_gain.data[7] = digitgain & 0xFF;
                return imx_i2c_write(client, IMX_DGC_LEN, (u8 *)&digit_gain);
        }
        return 0;
}

static int imx_set_exposure_gain(struct v4l2_subdev *sd, u16 coarse_itg,
        u16 gain, u16 digitgain)
{
        struct imx_device *dev = to_imx_sensor(sd);
        struct i2c_client *client = v4l2_get_subdevdata(sd);
        int lanes = imx_get_lanes(sd);
        unsigned int digitgain_scaled;
        int ret = 0;

        /* Validate exposure:  cannot exceed VTS-4 where VTS is 16bit */
        coarse_itg = clamp_t(u16, coarse_itg, 0, IMX_MAX_EXPOSURE_SUPPORTED);

        /* Validate gain: must not exceed maximum 8bit value */
        gain = clamp_t(u16, gain, 0, IMX_MAX_GLOBAL_GAIN_SUPPORTED);

        mutex_lock(&dev->input_lock);

        if (dev->sensor_id == IMX227_ID) {
                ret = imx_write_reg_array(client, imx_param_hold);
                if (ret) {
                        mutex_unlock(&dev->input_lock);
                        return ret;
                }
        }

        /* For imx175, setting gain must be delayed by one */
        if ((dev->sensor_id == IMX175_ID) && dev->digital_gain)
                digitgain_scaled = dev->digital_gain;
        else
                digitgain_scaled = digitgain;
        /* imx132 with two lanes needs more gain to saturate at max */
        if (dev->sensor_id == IMX132_ID && lanes > 1) {
                digitgain_scaled *= IMX132_2LANES_GAINFACT;
                digitgain_scaled >>= IMX132_2LANES_GAINFACT_SHIFT;
        }
        /* Validate digital gain: must not exceed 12 bit value*/
        digitgain_scaled = clamp_t(unsigned int, digitgain_scaled,
                                   0, IMX_MAX_DIGITAL_GAIN_SUPPORTED);

        ret = __imx_update_exposure_timing(client, coarse_itg,
                        dev->pixels_per_line, dev->lines_per_frame);
        if (ret)
                goto out;
        dev->coarse_itg = coarse_itg;

        if (dev->sensor_id == IMX175_ID)
                ret = __imx_update_gain(sd, dev->gain);
        else
                ret = __imx_update_gain(sd, gain);
        if (ret)
                goto out;
        dev->gain = gain;

        ret = __imx_update_digital_gain(client, digitgain_scaled);
        if (ret)
                goto out;
        dev->digital_gain = digitgain;

out:
        if (dev->sensor_id == IMX227_ID)
                ret = imx_write_reg_array(client, imx_param_update);
        mutex_unlock(&dev->input_lock);
        return ret;
}

static long imx_s_exposure(struct v4l2_subdev *sd,
                               struct atomisp_exposure *exposure)
{
        return imx_set_exposure_gain(sd, exposure->integration_time[0],
                                exposure->gain[0], exposure->gain[1]);
}

/* FIXME -To be updated with real OTP reading */
static int imx_g_priv_int_data(struct v4l2_subdev *sd,
                                   struct v4l2_private_int_data *priv)
{
        struct i2c_client *client = v4l2_get_subdevdata(sd);
        struct imx_device *dev = to_imx_sensor(sd);
        u8 __user *to = priv->data;
        u32 read_size = priv->size;
        int ret;

        /* No need to copy data if size is 0 */
        if (!read_size)
                goto out;

        if (IS_ERR(dev->otp_data)) {
                dev_err(&client->dev, "OTP data not available");
                return PTR_ERR(dev->otp_data);
        }
        /* Correct read_size value only if bigger than maximum */
        if (read_size > dev->otp_driver->size)
                read_size = dev->otp_driver->size;

        ret = copy_to_user(to, dev->otp_data, read_size);
        if (ret) {
                dev_err(&client->dev, "%s: failed to copy OTP data to user\n",
                         __func__);
                return -EFAULT;
        }
out:
        /* Return correct size */
        priv->size = dev->otp_driver->size;

        return 0;
}

static int __imx_init(struct v4l2_subdev *sd, u32 val)
{
        struct i2c_client *client = v4l2_get_subdevdata(sd);
        struct imx_device *dev = to_imx_sensor(sd);
        int lanes = imx_get_lanes(sd);
        int ret;

        if (dev->sensor_id == IMX_ID_DEFAULT)
                return 0;

        /* The default is no flip at sensor initialization */
        dev->h_flip->cur.val = 0;
        dev->v_flip->cur.val = 0;
        /* Sets the default FPS */
        dev->fps_index = 0;
        dev->curr_res_table = dev->mode_tables->res_preview;
        dev->entries_curr_table = dev->mode_tables->n_res_preview;

        ret = imx_write_reg_array(client, dev->mode_tables->init_settings);
        if (ret)
                return ret;

        if (dev->sensor_id == IMX132_ID && lanes > 0) {
                static const u8 imx132_rglanesel[] = {
                        IMX132_RGLANESEL_1LANE,         /* 1 lane */
                        IMX132_RGLANESEL_2LANES,        /* 2 lanes */
                        IMX132_RGLANESEL_1LANE,         /* undefined */
                        IMX132_RGLANESEL_4LANES,        /* 4 lanes */
                };
                ret = imx_write_reg(client, IMX_8BIT,
                                IMX132_RGLANESEL, imx132_rglanesel[lanes - 1]);
        }

        return ret;
}

static int imx_init(struct v4l2_subdev *sd, u32 val)
{
        struct imx_device *dev = to_imx_sensor(sd);
        int ret = 0;

        mutex_lock(&dev->input_lock);
        ret = __imx_init(sd, val);
        mutex_unlock(&dev->input_lock);

        return ret;
}

static long imx_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
{

        switch (cmd) {
        case ATOMISP_IOC_S_EXPOSURE:
                return imx_s_exposure(sd, arg);
        case ATOMISP_IOC_G_SENSOR_PRIV_INT_DATA:
                return imx_g_priv_int_data(sd, arg);
        default:
                return -EINVAL;
        }
        return 0;
}

static int power_up(struct v4l2_subdev *sd)
{
        struct i2c_client *client = v4l2_get_subdevdata(sd);
        struct imx_device *dev = to_imx_sensor(sd);
        int ret;

       /* power control */
        ret = dev->platform_data->power_ctrl(sd, 1);
        if (ret)
                goto fail_power;

        /* flis clock control */
        ret = dev->platform_data->flisclk_ctrl(sd, 1);
        if (ret)
                goto fail_clk;

        /* gpio ctrl */
        ret = dev->platform_data->gpio_ctrl(sd, 1);
        if (ret) {
                dev_err(&client->dev, "gpio failed\n");
                goto fail_gpio;
        }

        return 0;
fail_gpio:
        dev->platform_data->gpio_ctrl(sd, 0);
fail_clk:
        dev->platform_data->flisclk_ctrl(sd, 0);
fail_power:
        dev->platform_data->power_ctrl(sd, 0);
        dev_err(&client->dev, "sensor power-up failed\n");

        return ret;
}

static int power_down(struct v4l2_subdev *sd)
{
        struct imx_device *dev = to_imx_sensor(sd);
        struct i2c_client *client = v4l2_get_subdevdata(sd);
        int ret;

        ret = dev->platform_data->flisclk_ctrl(sd, 0);
        if (ret)
                dev_err(&client->dev, "flisclk failed\n");

        /* gpio ctrl */
        ret = dev->platform_data->gpio_ctrl(sd, 0);
        if (ret)
                dev_err(&client->dev, "gpio failed\n");

        /* power control */
        ret = dev->platform_data->power_ctrl(sd, 0);
        if (ret)
                dev_err(&client->dev, "vprog failed.\n");

        return ret;
}

static int __imx_s_power(struct v4l2_subdev *sd, int on)
{
        struct imx_device *dev = to_imx_sensor(sd);
        int ret = 0;
        int r = 0;

        if (on == 0) {
                ret = power_down(sd);
                if (dev->vcm_driver && dev->vcm_driver->power_down)
                        r = dev->vcm_driver->power_down(sd);
                if (ret == 0)
                        ret = r;
                dev->power = 0;
        } else {
                if (dev->vcm_driver && dev->vcm_driver->power_up)
                        ret = dev->vcm_driver->power_up(sd);
                if (ret)
                        return ret;
                ret = power_up(sd);
                if (!ret) {
                        dev->power = 1;
                        return __imx_init(sd, 0);
                }
        }

        return ret;
}

static int imx_s_power(struct v4l2_subdev *sd, int on)
{
        int ret;
        struct imx_device *dev = to_imx_sensor(sd);

        mutex_lock(&dev->input_lock);
        ret = __imx_s_power(sd, on);
        mutex_unlock(&dev->input_lock);

        return ret;
}

static int imx_get_intg_factor(struct i2c_client *client,
                                struct camera_mipi_info *info,
                                const struct imx_reg *reglist)
{
        struct v4l2_subdev *sd = i2c_get_clientdata(client);
        struct imx_device *dev = to_imx_sensor(sd);
        int lanes = imx_get_lanes(sd);
        u32 vt_pix_clk_div;
        u32 vt_sys_clk_div;
        u32 pre_pll_clk_div;
        u32 pll_multiplier;

        const int ext_clk_freq_hz = 19200000;
        struct atomisp_sensor_mode_data *buf = &info->data;
        int ret;
        u16 data[IMX_INTG_BUF_COUNT];

        u32 vt_pix_clk_freq_mhz;
        u32 coarse_integration_time_min;
        u32 coarse_integration_time_max_margin;
        u32 read_mode;
        u32 div;

        if (info == NULL)
                return -EINVAL;

        memset(data, 0, IMX_INTG_BUF_COUNT * sizeof(u16));
        ret = imx_read_reg(client, 1, IMX_VT_PIX_CLK_DIV, data);
        if (ret)
                return ret;
        vt_pix_clk_div = data[0] & IMX_MASK_5BIT;

        if (dev->sensor_id == IMX132_ID || dev->sensor_id == IMX208_ID) {
                static const int rgpltd[] = { 2, 4, 1, 1 };
                ret = imx_read_reg(client, 1, IMX132_208_VT_RGPLTD, data);
                if (ret)
                        return ret;
                vt_sys_clk_div = rgpltd[data[0] & IMX_MASK_2BIT];
        } else {
                ret = imx_read_reg(client, 1, IMX_VT_SYS_CLK_DIV, data);
                if (ret)
                        return ret;
                vt_sys_clk_div = data[0] & IMX_MASK_2BIT;
        }
        ret = imx_read_reg(client, 1, IMX_PRE_PLL_CLK_DIV, data);
        if (ret)
                return ret;
        pre_pll_clk_div = data[0] & IMX_MASK_4BIT;

        ret = imx_read_reg(client, 2,
                (dev->sensor_id == IMX132_ID ||
                 dev->sensor_id == IMX219_ID ||
                 dev->sensor_id == IMX208_ID) ?
                IMX132_208_219_PLL_MULTIPLIER : IMX_PLL_MULTIPLIER, data);
        if (ret)
                return ret;
        pll_multiplier = data[0] & IMX_MASK_11BIT;

        memset(data, 0, IMX_INTG_BUF_COUNT * sizeof(u16));
        ret = imx_read_reg(client, 4, IMX_COARSE_INTG_TIME_MIN, data);
        if (ret)
                return ret;
        coarse_integration_time_min = data[0];
        coarse_integration_time_max_margin = data[1];

        /* Get the cropping and output resolution to ISP for this mode. */
        ret =  imx_read_reg(client, 2, dev->reg_addr->horizontal_start_h, data);
        if (ret)
                return ret;
        buf->crop_horizontal_start = data[0];

        ret = imx_read_reg(client, 2, dev->reg_addr->vertical_start_h, data);
        if (ret)
                return ret;
        buf->crop_vertical_start = data[0];

        ret = imx_read_reg(client, 2, dev->reg_addr->horizontal_end_h, data);
        if (ret)
                return ret;
        buf->crop_horizontal_end = data[0];

        ret = imx_read_reg(client, 2, dev->reg_addr->vertical_end_h, data);
        if (ret)
                return ret;
        buf->crop_vertical_end = data[0];

        ret = imx_read_reg(client, 2,
                dev->reg_addr->horizontal_output_size_h, data);
        if (ret)
                return ret;
        buf->output_width = data[0];

        ret = imx_read_reg(client, 2,
                dev->reg_addr->vertical_output_size_h, data);
        if (ret)
                return ret;
        buf->output_height = data[0];

        memset(data, 0, IMX_INTG_BUF_COUNT * sizeof(u16));
        if (dev->sensor_id == IMX132_ID || dev->sensor_id == IMX208_ID ||
                dev->sensor_id == IMX219_ID)
                read_mode = 0;
        else {
                if (dev->sensor_id == IMX227_ID)
                        ret = imx_read_reg(client, 1, IMX227_READ_MODE, data);
                else
                        ret = imx_read_reg(client, 1, IMX_READ_MODE, data);

                if (ret)
                        return ret;
                read_mode = data[0] & IMX_MASK_2BIT;
        }

        div = pre_pll_clk_div*vt_sys_clk_div*vt_pix_clk_div;
        if (div == 0)
                return -EINVAL;

        if (dev->sensor_id == IMX132_ID || dev->sensor_id == IMX208_ID)
                vt_pix_clk_freq_mhz = ext_clk_freq_hz / div;
        else if (dev->sensor_id == IMX227_ID) {
                /* according to IMX227 datasheet:
                 * vt_pix_freq_mhz = * num_of_vt_lanes(4) * ivt_pix_clk_freq_mhz
                 */
                vt_pix_clk_freq_mhz =
                        (u64)4 * ext_clk_freq_hz * pll_multiplier;
                do_div(vt_pix_clk_freq_mhz, div);
        } else
                vt_pix_clk_freq_mhz = 2 * ext_clk_freq_hz / div;

        vt_pix_clk_freq_mhz *= pll_multiplier;
        if (dev->sensor_id == IMX132_ID && lanes > 0)
                vt_pix_clk_freq_mhz *= lanes;

        dev->vt_pix_clk_freq_mhz = vt_pix_clk_freq_mhz;

        buf->vt_pix_clk_freq_mhz = vt_pix_clk_freq_mhz;
        buf->coarse_integration_time_min = coarse_integration_time_min;
        buf->coarse_integration_time_max_margin =
                                coarse_integration_time_max_margin;

        buf->fine_integration_time_min = IMX_FINE_INTG_TIME;
        buf->fine_integration_time_max_margin = IMX_FINE_INTG_TIME;
        buf->fine_integration_time_def = IMX_FINE_INTG_TIME;
        buf->frame_length_lines = dev->lines_per_frame;
        buf->line_length_pck = dev->pixels_per_line;
        buf->read_mode = read_mode;

        if (dev->sensor_id == IMX132_ID || dev->sensor_id == IMX208_ID ||
                dev->sensor_id == IMX219_ID) {
                buf->binning_factor_x = 1;
                buf->binning_factor_y = 1;
        } else {
                if (dev->sensor_id == IMX227_ID)
                        ret = imx_read_reg(client, 1, IMX227_BINNING_ENABLE,
                                data);
                else
                        ret = imx_read_reg(client, 1, IMX_BINNING_ENABLE, data);

                if (ret)
                        return ret;
                /* 1:binning enabled, 0:disabled */
                if (data[0] == 1) {
                        if (dev->sensor_id == IMX227_ID)
                                ret = imx_read_reg(client, 1,
                                        IMX227_BINNING_TYPE, data);
                        else
                                ret = imx_read_reg(client, 1,
                                        IMX_BINNING_TYPE, data);

                        if (ret)
                                return ret;
                        buf->binning_factor_x = data[0] >> 4 & 0x0f;
                        if (!buf->binning_factor_x)
                                buf->binning_factor_x = 1;
                        buf->binning_factor_y = data[0] & 0xf;
                        if (!buf->binning_factor_y)
                                buf->binning_factor_y = 1;
                        /* WOWRKAROUND, NHD setting for IMX227 should have 4x4
                         * binning but the register setting does not reflect
                         * this, I am asking vendor why this happens. this is
                         * workaround for INTEL BZ 216560.
                         */
                        if (dev->sensor_id == IMX227_ID) {
                                if (dev->curr_res_table[dev->fmt_idx].width ==
                                        376 &&
                                    dev->curr_res_table[dev->fmt_idx].height ==
                                        656) {
                                        buf->binning_factor_x = 4;
                                        buf->binning_factor_y = 4;
                                }
                        }
                } else {
                        buf->binning_factor_x = 1;
                        buf->binning_factor_y = 1;
                }
        }

        return 0;
}

/* This returns the exposure time being used. This should only be used
   for filling in EXIF data, not for actual image processing. */
static int imx_q_exposure(struct v4l2_subdev *sd, s32 *value)
{
        struct i2c_client *client = v4l2_get_subdevdata(sd);
        struct imx_device *dev = to_imx_sensor(sd);
        u16 coarse;
        int ret;

        /* the fine integration time is currently not calculated */
        ret = imx_read_reg(client, IMX_16BIT,
                dev->reg_addr->coarse_integration_time, &coarse);
        *value = coarse;

        return ret;
}

static int imx_test_pattern(struct v4l2_subdev *sd)
{
        struct i2c_client *client = v4l2_get_subdevdata(sd);
        struct imx_device *dev = to_imx_sensor(sd);
        int ret;

        if (dev->power == 0)
                return 0;

        ret = imx_write_reg(client, IMX_16BIT, IMX_TEST_PATTERN_COLOR_R,
                (u16)(dev->tp_r->val >> 22));
        if (ret)
                return ret;

        ret = imx_write_reg(client, IMX_16BIT, IMX_TEST_PATTERN_COLOR_GR,
                (u16)(dev->tp_gr->val >> 22));
        if (ret)
                return ret;

        ret = imx_write_reg(client, IMX_16BIT, IMX_TEST_PATTERN_COLOR_GB,
                (u16)(dev->tp_gb->val >> 22));
        if (ret)
                return ret;

        ret = imx_write_reg(client, IMX_16BIT, IMX_TEST_PATTERN_COLOR_B,
                (u16)(dev->tp_b->val >> 22));
        if (ret)
                return ret;

        return imx_write_reg(client, IMX_16BIT, IMX_TEST_PATTERN_MODE,
                (u16)(dev->tp_mode->val));
}

static u32 imx_translate_bayer_order(enum atomisp_bayer_order code)
{
        switch (code) {
        case atomisp_bayer_order_rggb:
                return MEDIA_BUS_FMT_SRGGB10_1X10;
        case atomisp_bayer_order_grbg:
                return MEDIA_BUS_FMT_SGRBG10_1X10;
        case atomisp_bayer_order_bggr:
                return MEDIA_BUS_FMT_SBGGR10_1X10;
        case atomisp_bayer_order_gbrg:
                return MEDIA_BUS_FMT_SGBRG10_1X10;
        }
        return 0;
}

static int imx_v_flip(struct v4l2_subdev *sd, s32 value)
{
        struct imx_device *dev = to_imx_sensor(sd);
        struct camera_mipi_info *imx_info = NULL;
        struct i2c_client *client = v4l2_get_subdevdata(sd);
        int ret;
        u16 val;

        if (dev->power == 0)
                return -EIO;

        ret = imx_write_reg_array(client, dev->param_hold);
        if (ret)
                return ret;

        ret = imx_read_reg(client, IMX_8BIT,
                dev->reg_addr->img_orientation, &val);
        if (ret)
                return ret;
        if (value)
                val |= IMX_VFLIP_BIT;
        else
                val &= ~IMX_VFLIP_BIT;

        ret = imx_write_reg(client, IMX_8BIT,
                dev->reg_addr->img_orientation, val);
        if (ret)
                return ret;

        imx_info = v4l2_get_subdev_hostdata(sd);
        if (imx_info) {

                val &= (IMX_VFLIP_BIT|IMX_HFLIP_BIT);
                imx_info->raw_bayer_order = imx_bayer_order_mapping[val];
                dev->format.code = imx_translate_bayer_order(
                        imx_info->raw_bayer_order);
        }

        return imx_write_reg_array(client, dev->param_update);
}

static int imx_h_flip(struct v4l2_subdev *sd, s32 value)
{
        struct imx_device *dev = to_imx_sensor(sd);
        struct camera_mipi_info *imx_info = NULL;
        struct i2c_client *client = v4l2_get_subdevdata(sd);
        int ret;
        u16 val;

        if (dev->power == 0)
                return -EIO;

        ret = imx_write_reg_array(client, dev->param_hold);
        if (ret)
                return ret;
        ret = imx_read_reg(client, IMX_8BIT,
                dev->reg_addr->img_orientation, &val);
        if (ret)
                return ret;
        if (value)
                val |= IMX_HFLIP_BIT;
        else
                val &= ~IMX_HFLIP_BIT;
        ret = imx_write_reg(client, IMX_8BIT,
                dev->reg_addr->img_orientation, val);
        if (ret)
                return ret;

        imx_info = v4l2_get_subdev_hostdata(sd);
        if (imx_info) {
                val &= (IMX_VFLIP_BIT|IMX_HFLIP_BIT);
                imx_info->raw_bayer_order = imx_bayer_order_mapping[val];
                dev->format.code = imx_translate_bayer_order(
                imx_info->raw_bayer_order);
        }

        return imx_write_reg_array(client, dev->param_update);
}

static int imx_g_focal(struct v4l2_subdev *sd, s32 *val)
{
        *val = (IMX_FOCAL_LENGTH_NUM << 16) | IMX_FOCAL_LENGTH_DEM;
        return 0;
}

static int imx_g_fnumber(struct v4l2_subdev *sd, s32 *val)
{
        /*const f number for imx*/
        *val = (IMX_F_NUMBER_DEFAULT_NUM << 16) | IMX_F_NUMBER_DEM;
        return 0;
}

static int imx_g_fnumber_range(struct v4l2_subdev *sd, s32 *val)
{
        *val = (IMX_F_NUMBER_DEFAULT_NUM << 24) |
                (IMX_F_NUMBER_DEM << 16) |
                (IMX_F_NUMBER_DEFAULT_NUM << 8) | IMX_F_NUMBER_DEM;
        return 0;
}

static int imx_g_bin_factor_x(struct v4l2_subdev *sd, s32 *val)
{
        struct imx_device *dev = to_imx_sensor(sd);

        *val = dev->curr_res_table[dev->fmt_idx].bin_factor_x;

        return 0;
}

static int imx_g_bin_factor_y(struct v4l2_subdev *sd, s32 *val)
{
        struct imx_device *dev = to_imx_sensor(sd);

        *val = dev->curr_res_table[dev->fmt_idx].bin_factor_y;

        return 0;
}

int imx_vcm_power_up(struct v4l2_subdev *sd)
{
        struct imx_device *dev = to_imx_sensor(sd);
        if (dev->vcm_driver && dev->vcm_driver->power_up)
                return dev->vcm_driver->power_up(sd);
        return 0;
}

int imx_vcm_power_down(struct v4l2_subdev *sd)
{
        struct imx_device *dev = to_imx_sensor(sd);
        if (dev->vcm_driver && dev->vcm_driver->power_down)
                return dev->vcm_driver->power_down(sd);
        return 0;
}

int imx_vcm_init(struct v4l2_subdev *sd)
{
        struct imx_device *dev = to_imx_sensor(sd);
        if (dev->vcm_driver && dev->vcm_driver->init)
                return dev->vcm_driver->init(sd);
        return 0;
}

int imx_t_focus_vcm(struct v4l2_subdev *sd, u16 val)
{
        struct imx_device *dev = to_imx_sensor(sd);
        if (dev->vcm_driver && dev->vcm_driver->t_focus_vcm)
                return dev->vcm_driver->t_focus_vcm(sd, val);
        return 0;
}

int imx_t_focus_abs(struct v4l2_subdev *sd, s32 value)
{
        struct imx_device *dev = to_imx_sensor(sd);
        if (dev->vcm_driver && dev->vcm_driver->t_focus_abs)
                return dev->vcm_driver->t_focus_abs(sd, value);
        return 0;
}
int imx_t_focus_rel(struct v4l2_subdev *sd, s32 value)
{
        struct imx_device *dev = to_imx_sensor(sd);
        if (dev->vcm_driver && dev->vcm_driver->t_focus_rel)
                return dev->vcm_driver->t_focus_rel(sd, value);
        return 0;
}

int imx_q_focus_status(struct v4l2_subdev *sd, s32 *value)
{
        struct imx_device *dev = to_imx_sensor(sd);
        if (dev->vcm_driver && dev->vcm_driver->q_focus_status)
                return dev->vcm_driver->q_focus_status(sd, value);
        return 0;
}

int imx_q_focus_abs(struct v4l2_subdev *sd, s32 *value)
{
        struct imx_device *dev = to_imx_sensor(sd);
        if (dev->vcm_driver && dev->vcm_driver->q_focus_abs)
                return dev->vcm_driver->q_focus_abs(sd, value);
        return 0;
}

int imx_t_vcm_slew(struct v4l2_subdev *sd, s32 value)
{
        struct imx_device *dev = to_imx_sensor(sd);
        if (dev->vcm_driver && dev->vcm_driver->t_vcm_slew)
                return dev->vcm_driver->t_vcm_slew(sd, value);
        return 0;
}

int imx_t_vcm_timing(struct v4l2_subdev *sd, s32 value)
{
        struct imx_device *dev = to_imx_sensor(sd);
        if (dev->vcm_driver && dev->vcm_driver->t_vcm_timing)
                return dev->vcm_driver->t_vcm_timing(sd, value);
        return 0;
}

static int imx_s_ctrl(struct v4l2_ctrl *ctrl)
{
        struct imx_device *dev = container_of(
                ctrl->handler, struct imx_device, ctrl_handler);
        struct i2c_client *client = v4l2_get_subdevdata(&dev->sd);
        int ret = 0;

        switch (ctrl->id) {
        case V4L2_CID_TEST_PATTERN:
                ret = imx_test_pattern(&dev->sd);
                break;
        case V4L2_CID_VFLIP:
                dev_dbg(&client->dev, "%s: CID_VFLIP:%d.\n",
                        __func__, ctrl->val);
                ret = imx_v_flip(&dev->sd, ctrl->val);
                break;
        case V4L2_CID_HFLIP:
                dev_dbg(&client->dev, "%s: CID_HFLIP:%d.\n",
                        __func__, ctrl->val);
                ret = imx_h_flip(&dev->sd, ctrl->val);
                break;
        case V4L2_CID_FOCUS_ABSOLUTE:
                ret = imx_t_focus_abs(&dev->sd, ctrl->val);
                break;
        case V4L2_CID_FOCUS_RELATIVE:
                ret = imx_t_focus_rel(&dev->sd, ctrl->val);
                break;
        case V4L2_CID_VCM_SLEW:
                ret = imx_t_vcm_slew(&dev->sd, ctrl->val);
                break;
        case V4L2_CID_VCM_TIMEING:
                ret = imx_t_vcm_timing(&dev->sd, ctrl->val);
                break;
        }

        return ret;
}

static int imx_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
{
        struct imx_device *dev = container_of(
                ctrl->handler, struct imx_device, ctrl_handler);
        int ret = 0;
        unsigned int val;

        switch (ctrl->id) {
        case V4L2_CID_EXPOSURE_ABSOLUTE:
                ret = imx_q_exposure(&dev->sd, &ctrl->val);
                break;
        case V4L2_CID_FOCUS_ABSOLUTE:
                ret = imx_q_focus_abs(&dev->sd, &ctrl->val);
                break;
        case V4L2_CID_FOCUS_STATUS:
                ret = imx_q_focus_status(&dev->sd, &ctrl->val);
                break;
        case V4L2_CID_FOCAL_ABSOLUTE:
                ret = imx_g_focal(&dev->sd, &ctrl->val);
                break;
        case V4L2_CID_FNUMBER_ABSOLUTE:
                ret = imx_g_fnumber(&dev->sd, &ctrl->val);
                break;
        case V4L2_CID_FNUMBER_RANGE:
                ret = imx_g_fnumber_range(&dev->sd, &ctrl->val);
                break;
        case V4L2_CID_BIN_FACTOR_HORZ:
                ret = imx_g_bin_factor_x(&dev->sd, &ctrl->val);
                break;
        case V4L2_CID_BIN_FACTOR_VERT:
                ret = imx_g_bin_factor_y(&dev->sd, &ctrl->val);
                break;
        case V4L2_CID_VBLANK:
                ctrl->val = dev->lines_per_frame -
                        dev->curr_res_table[dev->fmt_idx].height;
                break;
        case V4L2_CID_HBLANK:
                ctrl->val = dev->pixels_per_line -
                        dev->curr_res_table[dev->fmt_idx].width;
                break;
        case V4L2_CID_PIXEL_RATE:
                ctrl->val = dev->vt_pix_clk_freq_mhz;
                break;
        case V4L2_CID_LINK_FREQ:
                val = dev->curr_res_table[dev->fmt_idx].
                                        fps_options[dev->fps_index].mipi_freq;
                if (val == 0)
                        val = dev->curr_res_table[dev->fmt_idx].mipi_freq;
                if (val == 0)
                        return -EINVAL;
                ctrl->val = val * 1000;                 /* To Hz */
                break;
        default:
                return -EINVAL;
        }

        return ret;
}

static const struct v4l2_ctrl_ops ctrl_ops = {
        .s_ctrl = imx_s_ctrl,
        .g_volatile_ctrl = imx_g_volatile_ctrl
};

static const struct v4l2_ctrl_config imx_controls[] = {
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_EXPOSURE_ABSOLUTE,
                .type = V4L2_CTRL_TYPE_INTEGER,
                .name = "exposure",
                .min = 0x0,
                .max = 0xffff,
                .step = 0x01,
                .def = 0x00,
                .flags = V4L2_CTRL_FLAG_VOLATILE,
        },
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_TEST_PATTERN,
                .type = V4L2_CTRL_TYPE_INTEGER,
                .name = "Test pattern",
                .min = 0,
                .max = 0xffff,
                .step = 1,
                .def = 0,
        },
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_TEST_PATTERN_COLOR_R,
                .type = V4L2_CTRL_TYPE_INTEGER,
                .name = "Test pattern solid color R",
                .min = INT_MIN,
                .max = INT_MAX,
                .step = 1,
                .def = 0,
        },
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_TEST_PATTERN_COLOR_GR,
                .type = V4L2_CTRL_TYPE_INTEGER,
                .name = "Test pattern solid color GR",
                .min = INT_MIN,
                .max = INT_MAX,
                .step = 1,
                .def = 0,
        },
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_TEST_PATTERN_COLOR_GB,
                .type = V4L2_CTRL_TYPE_INTEGER,
                .name = "Test pattern solid color GB",
                .min = INT_MIN,
                .max = INT_MAX,
                .step = 1,
                .def = 0,
        },
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_TEST_PATTERN_COLOR_B,
                .type = V4L2_CTRL_TYPE_INTEGER,
                .name = "Test pattern solid color B",
                .min = INT_MIN,
                .max = INT_MAX,
                .step = 1,
                .def = 0,
        },
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_VFLIP,
                .type = V4L2_CTRL_TYPE_BOOLEAN,
                .name = "Flip",
                .min = 0,
                .max = 1,
                .step = 1,
                .def = 0,
        },
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_HFLIP,
                .type = V4L2_CTRL_TYPE_BOOLEAN,
                .name = "Mirror",
                .min = 0,
                .max = 1,
                .step = 1,
                .def = 0,
        },
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_FOCUS_ABSOLUTE,
                .type = V4L2_CTRL_TYPE_INTEGER,
                .name = "focus move absolute",
                .min = 0,
                .max = IMX_MAX_FOCUS_POS,
                .step = 1,
                .def = 0,
                .flags = V4L2_CTRL_FLAG_VOLATILE,
        },
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_FOCUS_RELATIVE,
                .type = V4L2_CTRL_TYPE_INTEGER,
                .name = "focus move relative",
                .min = IMX_MAX_FOCUS_NEG,
                .max = IMX_MAX_FOCUS_POS,
                .step = 1,
                .def = 0,
                .flags = 0,
        },
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_FOCUS_STATUS,
                .type = V4L2_CTRL_TYPE_INTEGER,
                .name = "focus status",
                .min = 0,
                .max = 100, /* allow enum to grow in the future */
                .step = 1,
                .def = 0,
                .flags = V4L2_CTRL_FLAG_VOLATILE,
        },
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_VCM_SLEW,
                .type = V4L2_CTRL_TYPE_INTEGER,
                .name = "vcm slew",
                .min = 0,
                .max = IMX_VCM_SLEW_STEP_MAX,
                .step = 1,
                .def = 0,
                .flags = 0,
        },
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_VCM_TIMEING,
                .type = V4L2_CTRL_TYPE_INTEGER,
                .name = "vcm step time",
                .min = 0,
                .max = IMX_VCM_SLEW_TIME_MAX,
                .step = 1,
                .def = 0,
                .flags = 0,
        },
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_FOCAL_ABSOLUTE,
                .type = V4L2_CTRL_TYPE_INTEGER,
                .name = "focal length",
                .min = IMX_FOCAL_LENGTH_DEFAULT,
                .max = IMX_FOCAL_LENGTH_DEFAULT,
                .step = 0x01,
                .def = IMX_FOCAL_LENGTH_DEFAULT,
                .flags = V4L2_CTRL_FLAG_VOLATILE,
        },
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_FNUMBER_ABSOLUTE,
                .type = V4L2_CTRL_TYPE_INTEGER,
                .name = "f-number",
                .min = IMX_F_NUMBER_DEFAULT,
                .max = IMX_F_NUMBER_DEFAULT,
                .step = 0x01,
                .def = IMX_F_NUMBER_DEFAULT,
                .flags = V4L2_CTRL_FLAG_VOLATILE,
        },
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_FNUMBER_RANGE,
                .type = V4L2_CTRL_TYPE_INTEGER,
                .name = "f-number range",
                .min = IMX_F_NUMBER_RANGE,
                .max =  IMX_F_NUMBER_RANGE,
                .step = 0x01,
                .def = IMX_F_NUMBER_RANGE,
                .flags = V4L2_CTRL_FLAG_VOLATILE,
        },
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_BIN_FACTOR_HORZ,
                .type = V4L2_CTRL_TYPE_INTEGER,
                .name = "horizontal binning factor",
                .min = 0,
                .max = IMX_BIN_FACTOR_MAX,
                .step = 1,
                .def = 0,
                .flags = V4L2_CTRL_FLAG_VOLATILE,
        },
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_BIN_FACTOR_VERT,
                .type = V4L2_CTRL_TYPE_INTEGER,
                .name = "vertical binning factor",
                .min = 0,
                .max = IMX_BIN_FACTOR_MAX,
                .step = 1,
                .def = 0,
                .flags = V4L2_CTRL_FLAG_VOLATILE,
        },
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_LINK_FREQ,
                .name = "Link Frequency",
                .type = V4L2_CTRL_TYPE_INTEGER,
                .min = 1,
                .max = 1500000 * 1000,
                .step = 1,
                .def = 1,
                .flags = V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY,
        },
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_PIXEL_RATE,
                .name = "Pixel Rate",
                .type = V4L2_CTRL_TYPE_INTEGER,
                .min = 0,
                .max = INT_MAX,
                .step = 1,
                .def = 0,
                .flags = V4L2_CTRL_FLAG_VOLATILE,
        },
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_HBLANK,
                .name = "Horizontal Blanking",
                .type = V4L2_CTRL_TYPE_INTEGER,
                .min = 0,
                .max = SHRT_MAX,
                .step = 1,
                .def = 0,
                .flags = V4L2_CTRL_FLAG_VOLATILE,
        },
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_VBLANK,
                .name = "Vertical Blanking",
                .type = V4L2_CTRL_TYPE_INTEGER,
                .min = 0,
                .max = SHRT_MAX,
                .step = 1,
                .def = 0,
                .flags = V4L2_CTRL_FLAG_VOLATILE,
        },
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_HFLIP,
                .name = "Horizontal Flip",
                .type = V4L2_CTRL_TYPE_INTEGER,
                .min = 0,
                .max = 1,
                .step = 1,
                .def = 0,
                .flags = 0,
        },
        {
                .ops = &ctrl_ops,
                .id = V4L2_CID_VFLIP,
                .name = "Vertical Flip",
                .type = V4L2_CTRL_TYPE_INTEGER,
                .min = 0,
                .max = 1,
                .step = 1,
                .def = 0,
                .flags = 0,
        },
};

/*
 * distance - calculate the distance
 * @res: resolution
 * @w: width
 * @h: height
 *
 * Get the gap between resolution and w/h.
 * res->width/height smaller than w/h wouldn't be considered.
 * Returns the value of gap or -1 if fail.
 */
#define LARGEST_ALLOWED_RATIO_MISMATCH 600
static int distance(struct imx_resolution const *res, u32 w, u32 h,
                bool keep_ratio)
{
        unsigned int w_ratio;
        unsigned int h_ratio;
        int match;
        unsigned int allowed_ratio_mismatch = LARGEST_ALLOWED_RATIO_MISMATCH;

        if (!keep_ratio)
                allowed_ratio_mismatch = ~0;

        if (w == 0)
                return -1;
        w_ratio = (res->width << 13) / w;
        if (h == 0)
                return -1;
        h_ratio = (res->height << 13) / h;
        if (h_ratio == 0)
                return -1;
        match   = abs(((w_ratio << 13) / h_ratio) - ((int)8192));

        if ((w_ratio < (int)8192) || (h_ratio < (int)8192)  ||
                (match > allowed_ratio_mismatch))
                return -1;

        return w_ratio + h_ratio;
}

/* Return the nearest higher resolution index */
static int nearest_resolution_index(struct v4l2_subdev *sd, int w, int h)
{
        int i;
        int idx = -1;
        int dist;
        int fps_diff;
        int min_fps_diff = INT_MAX;
        int min_dist = INT_MAX;
        const struct imx_resolution *tmp_res = NULL;
        struct imx_device *dev = to_imx_sensor(sd);
        bool again = 1;
retry:
        for (i = 0; i < dev->entries_curr_table; i++) {
                tmp_res = &dev->curr_res_table[i];
                dist = distance(tmp_res, w, h, again);
                if (dist == -1)
                        continue;
                if (dist < min_dist) {
                        min_dist = dist;
                        idx = i;
                }
                if (dist == min_dist) {
                        fps_diff = __imx_min_fps_diff(dev->targetfps,
                                                tmp_res->fps_options);
                        if (fps_diff < min_fps_diff) {
                                min_fps_diff = fps_diff;
                                idx = i;
                        }
                }
        }

        /*
         * FIXME!
         * only IMX135 for Saltbay and IMX227 use this algorithm
         */
        if (idx == -1 && again == true && dev->new_res_sel_method) {
                again = false;
                goto retry;
        }
        return idx;
}

/* Call with ctrl_handler.lock hold */
static int __adjust_hvblank(struct v4l2_subdev *sd)
{
        struct i2c_client *client = v4l2_get_subdevdata(sd);
        struct imx_device *dev = to_imx_sensor(sd);
        u16 new_frame_length_lines, new_line_length_pck;
        int ret;

        /*
         * No need to adjust h/v blank if not set dbg value
         * Note that there is no other checking on the h/v blank value,
         * as h/v blank can be set to any value above zero for debug purpose
         */
        if (!dev->v_blank->val || !dev->h_blank->val)
                return 0;

        new_frame_length_lines = dev->curr_res_table[dev->fmt_idx].height +
                dev->v_blank->val;
        new_line_length_pck = dev->curr_res_table[dev->fmt_idx].width +
                dev->h_blank->val;

        ret = imx_write_reg(client, IMX_16BIT,
                dev->reg_addr->line_length_pixels, new_line_length_pck);
        if (ret)
                return ret;
        ret = imx_write_reg(client, IMX_16BIT,
                dev->reg_addr->frame_length_lines, new_frame_length_lines);
        if (ret)
                return ret;

        dev->lines_per_frame = new_frame_length_lines;
        dev->pixels_per_line = new_line_length_pck;

        return 0;
}

static int imx_set_fmt(struct v4l2_subdev *sd,
                       struct v4l2_subdev_pad_config *cfg,
                       struct v4l2_subdev_format *format)
{
        struct v4l2_mbus_framefmt *fmt = &format->format;
        struct imx_device *dev = to_imx_sensor(sd);
        struct camera_mipi_info *imx_info = NULL;
        struct i2c_client *client = v4l2_get_subdevdata(sd);
        const struct imx_resolution *res;
        int lanes = imx_get_lanes(sd);
        int ret;
        u16 data, val;
         int idx;
        if (format->pad)
                return -EINVAL;
        if (!fmt)
                return -EINVAL;

        imx_info = v4l2_get_subdev_hostdata(sd);
        if (imx_info == NULL)
                return -EINVAL;
        if ((fmt->width > imx_max_res[dev->sensor_id].res_max_width)
                || (fmt->height > imx_max_res[dev->sensor_id].res_max_height)) {
                fmt->width =  imx_max_res[dev->sensor_id].res_max_width;
                fmt->height = imx_max_res[dev->sensor_id].res_max_height;
        } else {
                idx = nearest_resolution_index(sd, fmt->width, fmt->height);

                /*
                 * nearest_resolution_index() doesn't return smaller
                 *  resolutions. If it fails, it means the requested
                 *  resolution is higher than wecan support. Fallback
                 *  to highest possible resolution in this case.
                 */
                if (idx == -1)
                        idx = dev->entries_curr_table - 1;

                fmt->width = dev->curr_res_table[idx].width;
                fmt->height = dev->curr_res_table[idx].height;
        }

        fmt->code = dev->format.code;
    if(format->which == V4L2_SUBDEV_FORMAT_TRY) {
                cfg->try_fmt = *fmt;
                return 0;
        }
        mutex_lock(&dev->input_lock);

        dev->fmt_idx = nearest_resolution_index(sd, fmt->width, fmt->height);
        if (dev->fmt_idx == -1) {
                ret = -EINVAL;
                goto out;
        }
        res = &dev->curr_res_table[dev->fmt_idx];

        /* Adjust the FPS selection based on the resolution selected */
        dev->fps_index = __imx_nearest_fps_index(dev->targetfps,
                                                res->fps_options);
        dev->fps = res->fps_options[dev->fps_index].fps;
        dev->regs = res->fps_options[dev->fps_index].regs;
        if (!dev->regs)
                dev->regs = res->regs;

        ret = imx_write_reg_array(client, dev->regs);
        if (ret)
                goto out;

        if (dev->sensor_id == IMX132_ID && lanes > 0) {
                static const u8 imx132_rgpltd[] = {
                        2,              /* 1 lane:  /1 */
                        0,              /* 2 lanes: /2 */
                        0,              /* undefined   */
                        1,              /* 4 lanes: /4 */
                };
                ret = imx_write_reg(client, IMX_8BIT, IMX132_208_VT_RGPLTD,
                                    imx132_rgpltd[lanes - 1]);
                if (ret)
                        goto out;
        }

        dev->pixels_per_line = res->fps_options[dev->fps_index].pixels_per_line;
        dev->lines_per_frame = res->fps_options[dev->fps_index].lines_per_frame;

        /* dbg h/v blank time */
        __adjust_hvblank(sd);

        ret = __imx_update_exposure_timing(client, dev->coarse_itg,
                dev->pixels_per_line, dev->lines_per_frame);
        if (ret)
                goto out;

        ret = __imx_update_gain(sd, dev->gain);
        if (ret)
                goto out;

        ret = __imx_update_digital_gain(client, dev->digital_gain);
        if (ret)
                goto out;

        ret = imx_write_reg_array(client, dev->param_update);
        if (ret)
                goto out;

        ret = imx_get_intg_factor(client, imx_info, dev->regs);
        if (ret)
                goto out;

        ret = imx_read_reg(client, IMX_8BIT,
                dev->reg_addr->img_orientation, &val);
        if (ret)
                goto out;
        val &= (IMX_VFLIP_BIT|IMX_HFLIP_BIT);
        imx_info->raw_bayer_order = imx_bayer_order_mapping[val];
        dev->format.code = imx_translate_bayer_order(
                imx_info->raw_bayer_order);

        /*
         * Fill meta data info. add imx135 metadata setting for RAW10 format
         */
        switch (dev->sensor_id) {
        case IMX135_ID:
                ret = imx_read_reg(client, 2,
                                IMX135_OUTPUT_DATA_FORMAT_REG, &data);
                if (ret)
                        goto out;
                /*
                 * The IMX135 can support various resolutions like
                 * RAW6/8/10/12/14.
                 * 1.The data format is RAW10:
                 *   matadata width = current resolution width(pixel) * 10 / 8
                 * 2.The data format is RAW6 or RAW8:
                 *   matadata width = current resolution width(pixel);
                 * 3.other data format(RAW12/14 etc):
                 *   TBD.
                 */
                if (data == IMX135_OUTPUT_FORMAT_RAW10)
                        /* the data format is RAW10. */
                        imx_info->metadata_width = res->width * 10 / 8;
                else
                        /* The data format is RAW6/8/12/14/ etc. */
                        imx_info->metadata_width = res->width;

                imx_info->metadata_height = IMX135_EMBEDDED_DATA_LINE_NUM;

                if (imx_info->metadata_effective_width == NULL)
                        imx_info->metadata_effective_width =
                                imx135_embedded_effective_size;

                break;
        case IMX227_ID:
                ret = imx_read_reg(client, 2, IMX227_OUTPUT_DATA_FORMAT_REG,
                        &data);
                if (ret)
                        goto out;
                if (data == IMX227_OUTPUT_FORMAT_RAW10)
                        /* the data format is RAW10. */
                        imx_info->metadata_width = res->width * 10 / 8;
                else
                        /* The data format is RAW6/8/12/14/ etc. */
                        imx_info->metadata_width = res->width;

                imx_info->metadata_height = IMX227_EMBEDDED_DATA_LINE_NUM;

                if (imx_info->metadata_effective_width == NULL)
                        imx_info->metadata_effective_width =
                                imx227_embedded_effective_size;

                break;
        default:
                imx_info->metadata_width = 0;
                imx_info->metadata_height = 0;
                imx_info->metadata_effective_width = NULL;
                break;
        }

out:
        mutex_unlock(&dev->input_lock);
        return ret;
}


static int imx_get_fmt(struct v4l2_subdev *sd,
                       struct v4l2_subdev_pad_config *cfg,
                       struct v4l2_subdev_format *format)
{
        struct v4l2_mbus_framefmt *fmt = &format->format;
        struct imx_device *dev = to_imx_sensor(sd);

        if (format->pad)
                return -EINVAL;
        if (!fmt)
                return -EINVAL;

        mutex_lock(&dev->input_lock);
        fmt->width = dev->curr_res_table[dev->fmt_idx].width;
        fmt->height = dev->curr_res_table[dev->fmt_idx].height;
        fmt->code = dev->format.code;
        mutex_unlock(&dev->input_lock);
        return 0;
}

static int imx_detect(struct i2c_client *client, u16 *id, u8 *revision)
{
        struct i2c_adapter *adapter = client->adapter;

        /* i2c check */
        if (!i2c_check_functionality(adapter, I2C_FUNC_I2C))
                return -ENODEV;

        /* check sensor chip ID  */
        if (imx_read_reg(client, IMX_16BIT, IMX132_175_208_219_CHIP_ID, id)) {
                v4l2_err(client, "sensor_id = 0x%x\n", *id);
                return -ENODEV;
        }

        if (*id == IMX132_ID || *id == IMX175_ID ||
                *id == IMX208_ID || *id == IMX219_ID)
                goto found;

        if (imx_read_reg(client, IMX_16BIT, IMX134_135_227_CHIP_ID, id)) {
                v4l2_err(client, "sensor_id = 0x%x\n", *id);
                return -ENODEV;
        }
        if (*id != IMX134_ID && *id != IMX135_ID && *id != IMX227_ID) {
                v4l2_err(client, "no imx sensor found\n");
                return -ENODEV;
        }
found:
        v4l2_info(client, "sensor_id = 0x%x\n", *id);

        /* TODO - need to be updated */
        *revision = 0;

        return 0;
}

static void __imx_print_timing(struct v4l2_subdev *sd)
{
        struct imx_device *dev = to_imx_sensor(sd);
        struct i2c_client *client = v4l2_get_subdevdata(sd);
        u16 width = dev->curr_res_table[dev->fmt_idx].width;
        u16 height = dev->curr_res_table[dev->fmt_idx].height;

        dev_dbg(&client->dev, "Dump imx timing in stream on:\n");
        dev_dbg(&client->dev, "width: %d:\n", width);
        dev_dbg(&client->dev, "height: %d:\n", height);
        dev_dbg(&client->dev, "pixels_per_line: %d:\n", dev->pixels_per_line);
        dev_dbg(&client->dev, "line per frame: %d:\n", dev->lines_per_frame);
        dev_dbg(&client->dev, "pix freq: %d:\n", dev->vt_pix_clk_freq_mhz);
        dev_dbg(&client->dev, "init fps: %d:\n", dev->vt_pix_clk_freq_mhz /
                        dev->pixels_per_line / dev->lines_per_frame);
        dev_dbg(&client->dev, "HBlank: %d nS:\n",
                        1000 * (dev->pixels_per_line - width) /
                        (dev->vt_pix_clk_freq_mhz / 1000000));
        dev_dbg(&client->dev, "VBlank: %d uS:\n",
                        (dev->lines_per_frame - height) * dev->pixels_per_line /
                        (dev->vt_pix_clk_freq_mhz / 1000000));
}

/*
 * imx stream on/off
 */
static int imx_s_stream(struct v4l2_subdev *sd, int enable)
{
        int ret;
        struct i2c_client *client = v4l2_get_subdevdata(sd);
        struct imx_device *dev = to_imx_sensor(sd);

        mutex_lock(&dev->input_lock);
        if (enable) {
                /* Noise reduction & dead pixel applied before streaming */
                if (dev->fw == NULL) {
                        dev_warn(&client->dev, "No MSR loaded from library");
                } else {
                        ret = apply_msr_data(client, dev->fw);
                        if (ret) {
                                mutex_unlock(&dev->input_lock);
                                return ret;
                        }
                }
                ret = imx_test_pattern(sd);
                if (ret) {
                        v4l2_err(client, "Configure test pattern failed.\n");
                        mutex_unlock(&dev->input_lock);
                        return ret;
                }
                __imx_print_timing(sd);
                ret = imx_write_reg_array(client, imx_streaming);
                if (ret != 0) {
                        v4l2_err(client, "write_reg_array err\n");
                        mutex_unlock(&dev->input_lock);
                        return ret;
                }
                dev->streaming = 1;
                if (dev->vcm_driver && dev->vcm_driver->t_focus_abs_init)
                        dev->vcm_driver->t_focus_abs_init(sd);
        } else {
                ret = imx_write_reg_array(client, imx_soft_standby);
                if (ret != 0) {
                        v4l2_err(client, "write_reg_array err\n");
                        mutex_unlock(&dev->input_lock);
                        return ret;
                }
                dev->streaming = 0;
                dev->targetfps = 0;
        }
        mutex_unlock(&dev->input_lock);

        return 0;
}

static int __update_imx_device_settings(struct imx_device *dev, u16 sensor_id)
{
        /* IMX on other platform is not supported yet */
        return -EINVAL;
}

static int imx_s_config(struct v4l2_subdev *sd,
                            int irq, void *pdata)
{
        struct imx_device *dev = to_imx_sensor(sd);
        struct i2c_client *client = v4l2_get_subdevdata(sd);
        u8 sensor_revision;
        u16 sensor_id;
        int ret;
        if (pdata == NULL)
                return -ENODEV;

        dev->platform_data = pdata;

        mutex_lock(&dev->input_lock);

        if (dev->platform_data->platform_init) {
                ret = dev->platform_data->platform_init(client);
                if (ret) {
                        mutex_unlock(&dev->input_lock);
                        dev_err(&client->dev, "imx platform init err\n");
                        return ret;
                }
        }
        /*
         * power off the module first.
         *
         * As first power on by board have undecided state of power/gpio pins.
         */
        ret = __imx_s_power(sd, 0);
        if (ret) {
                v4l2_err(client, "imx power-down err.\n");
                mutex_unlock(&dev->input_lock);
                return ret;
        }

        ret = __imx_s_power(sd, 1);
        if (ret) {
                v4l2_err(client, "imx power-up err.\n");

                mutex_unlock(&dev->input_lock);
                return ret;
        }

        ret = dev->platform_data->csi_cfg(sd, 1);
        if (ret)
                goto fail_csi_cfg;

        /* config & detect sensor */
        ret = imx_detect(client, &sensor_id, &sensor_revision);
        if (ret) {
                v4l2_err(client, "imx_detect err s_config.\n");
                goto fail_detect;
        }

        dev->sensor_id = sensor_id;
        dev->sensor_revision = sensor_revision;

        /* Resolution settings depend on sensor type and platform */
        ret = __update_imx_device_settings(dev, dev->sensor_id);
        if (ret)
                goto fail_detect;
        /* Read sensor's OTP data */
        dev->otp_data = dev->otp_driver->otp_read(sd,
                dev->otp_driver->dev_addr, dev->otp_driver->start_addr,
                dev->otp_driver->size);

        /* power off sensor */
        ret = __imx_s_power(sd, 0);

        mutex_unlock(&dev->input_lock);
        if (ret)
                v4l2_err(client, "imx power-down err.\n");

        return ret;

fail_detect:
        dev->platform_data->csi_cfg(sd, 0);
fail_csi_cfg:
        __imx_s_power(sd, 0);
        if (dev->platform_data->platform_deinit)
                dev->platform_data->platform_deinit();
        mutex_unlock(&dev->input_lock);
        dev_err(&client->dev, "sensor power-gating failed\n");
        return ret;
}

static int
imx_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
                   struct v4l2_subdev_mbus_code_enum *code)
{
        struct imx_device *dev = to_imx_sensor(sd);
        if (code->index >= MAX_FMTS)
                return -EINVAL;

        mutex_lock(&dev->input_lock);
        code->code = dev->format.code;
        mutex_unlock(&dev->input_lock);
        return 0;
}

static int
imx_enum_frame_size(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
                    struct v4l2_subdev_frame_size_enum *fse)
{
        int index = fse->index;
        struct imx_device *dev = to_imx_sensor(sd);

        mutex_lock(&dev->input_lock);
        if (index >= dev->entries_curr_table) {
                mutex_unlock(&dev->input_lock);
                return -EINVAL;
        }

        fse->min_width = dev->curr_res_table[index].width;
        fse->min_height = dev->curr_res_table[index].height;
        fse->max_width = dev->curr_res_table[index].width;
        fse->max_height = dev->curr_res_table[index].height;
        mutex_unlock(&dev->input_lock);
        return 0;
}

static int
imx_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *param)
{
        struct imx_device *dev = to_imx_sensor(sd);

        mutex_lock(&dev->input_lock);
        dev->run_mode = param->parm.capture.capturemode;

        switch (dev->run_mode) {
        case CI_MODE_VIDEO:
                dev->curr_res_table = dev->mode_tables->res_video;
                dev->entries_curr_table = dev->mode_tables->n_res_video;
                break;
        case CI_MODE_STILL_CAPTURE:
                dev->curr_res_table = dev->mode_tables->res_still;
                dev->entries_curr_table = dev->mode_tables->n_res_still;
                break;
        default:
                dev->curr_res_table = dev->mode_tables->res_preview;
                dev->entries_curr_table = dev->mode_tables->n_res_preview;
        }
        mutex_unlock(&dev->input_lock);
        return 0;
}

int
imx_g_frame_interval(struct v4l2_subdev *sd,
                                struct v4l2_subdev_frame_interval *interval)
{
        struct imx_device *dev = to_imx_sensor(sd);

        mutex_lock(&dev->input_lock);
        interval->interval.denominator = dev->fps;
        interval->interval.numerator = 1;
        mutex_unlock(&dev->input_lock);
        return 0;
}

static int __imx_s_frame_interval(struct v4l2_subdev *sd,
                        struct v4l2_subdev_frame_interval *interval)
{
        struct imx_device *dev = to_imx_sensor(sd);
        struct i2c_client *client = v4l2_get_subdevdata(sd);
        const struct imx_resolution *res =
                                &dev->curr_res_table[dev->fmt_idx];
        struct camera_mipi_info *imx_info = NULL;
        unsigned short pixels_per_line;
        unsigned short lines_per_frame;
        unsigned int fps_index;
        int fps;
        int ret = 0;


        imx_info = v4l2_get_subdev_hostdata(sd);
        if (imx_info == NULL)
                return -EINVAL;

        if (!interval->interval.numerator)
                interval->interval.numerator = 1;

        fps = interval->interval.denominator / interval->interval.numerator;

        if (!fps)
                return -EINVAL;

        dev->targetfps = fps;
        /* No need to proceed further if we are not streaming */
        if (!dev->streaming)
                return 0;

         /* Ignore if we are already using the required FPS. */
        if (fps == dev->fps)
                return 0;

        /*
         * Start here, sensor is already streaming, so adjust fps dynamically
         */
        fps_index = __imx_above_nearest_fps_index(fps, res->fps_options);
        if (fps > res->fps_options[fps_index].fps) {
                /*
                 * if does not have high fps setting, not support increase fps
                 * by adjust lines per frame.
                 */
                dev_err(&client->dev, "Could not support fps: %d.\n", fps);
                return -EINVAL;
        }

        if (res->fps_options[fps_index].regs &&
            res->fps_options[fps_index].regs != dev->regs) {
                /*
                 * if need a new setting, but the new setting has difference
                 * with current setting, not use this one, as may have
                 * unexpected result, e.g. PLL, IQ.
                 */
                dev_dbg(&client->dev,
                        "Sensor is streaming, not apply new sensor setting\n");
                if (fps > res->fps_options[dev->fps_index].fps) {
                        /*
                         * Does not support increase fps based on low fps
                         * setting, as the high fps setting could not be used,
                         * and fps requested is above current setting fps.
                         */
                        dev_warn(&client->dev,
                        "Could not support fps: %d, keep current: %d.\n",
                        fps, dev->fps);
                        return 0;
                }
        } else {
                dev->fps_index = fps_index;
                dev->fps = res->fps_options[dev->fps_index].fps;
        }

        /* Update the new frametimings based on FPS */
        pixels_per_line = res->fps_options[dev->fps_index].pixels_per_line;
        lines_per_frame = res->fps_options[dev->fps_index].lines_per_frame;

        if (fps > res->fps_options[fps_index].fps) {
                /*
                 * if does not have high fps setting, not support increase fps
                 * by adjust lines per frame.
                 */
                dev_warn(&client->dev, "Could not support fps: %d. Use:%d.\n",
                                fps, res->fps_options[fps_index].fps);
                goto done;
        }

        /* if the new setting does not match exactly */
        if (dev->fps != fps) {
#define MAX_LINES_PER_FRAME     0xffff
                dev_dbg(&client->dev, "adjusting fps using lines_per_frame\n");
                /*
                 * FIXME!
                 * 1: check DS on max value of lines_per_frame
                 * 2: consider use pixel per line for more range?
                 */
                if (dev->lines_per_frame * dev->fps / fps >
                        MAX_LINES_PER_FRAME) {
                        dev_warn(&client->dev,
                "adjust lines_per_frame out of range, try to use max value.\n");
                        lines_per_frame = MAX_LINES_PER_FRAME;
                } else {
                        lines_per_frame = lines_per_frame * dev->fps / fps;
                }
        }
done:
        /* Update the new frametimings based on FPS */
        dev->pixels_per_line = pixels_per_line;
        dev->lines_per_frame = lines_per_frame;

        /* Update the new values so that user side knows the current settings */
        ret = __imx_update_exposure_timing(client,
                dev->coarse_itg, dev->pixels_per_line, dev->lines_per_frame);
        if (ret)
                return ret;

        dev->fps = fps;

        ret = imx_get_intg_factor(client, imx_info, dev->regs);
        if (ret)
                return ret;

        interval->interval.denominator = res->fps_options[dev->fps_index].fps;
        interval->interval.numerator = 1;
        __imx_print_timing(sd);

        return ret;
}

static int imx_s_frame_interval(struct v4l2_subdev *sd,
                        struct v4l2_subdev_frame_interval *interval)
{
        struct imx_device *dev = to_imx_sensor(sd);
        int ret;

        mutex_lock(&dev->input_lock);
        ret = __imx_s_frame_interval(sd, interval);
        mutex_unlock(&dev->input_lock);

        return ret;
}
static int imx_g_skip_frames(struct v4l2_subdev *sd, u32 *frames)
{
        struct imx_device *dev = to_imx_sensor(sd);

        mutex_lock(&dev->input_lock);
        *frames = dev->curr_res_table[dev->fmt_idx].skip_frames;
        mutex_unlock(&dev->input_lock);

        return 0;
}

static const struct v4l2_subdev_sensor_ops imx_sensor_ops = {
        .g_skip_frames  = imx_g_skip_frames,
};

static const struct v4l2_subdev_video_ops imx_video_ops = {
        .s_stream = imx_s_stream,
        .s_parm = imx_s_parm,
        .g_frame_interval = imx_g_frame_interval,
        .s_frame_interval = imx_s_frame_interval,
};

static const struct v4l2_subdev_core_ops imx_core_ops = {
        .s_power = imx_s_power,
        .ioctl = imx_ioctl,
        .init = imx_init,
};

static const struct v4l2_subdev_pad_ops imx_pad_ops = {
        .enum_mbus_code = imx_enum_mbus_code,
        .enum_frame_size = imx_enum_frame_size,
        .get_fmt = imx_get_fmt,
        .set_fmt = imx_set_fmt,
};

static const struct v4l2_subdev_ops imx_ops = {
        .core = &imx_core_ops,
        .video = &imx_video_ops,
        .pad = &imx_pad_ops,
        .sensor = &imx_sensor_ops,
};

static const struct media_entity_operations imx_entity_ops = {
        .link_setup = NULL,
};

static int imx_remove(struct i2c_client *client)
{
        struct v4l2_subdev *sd = i2c_get_clientdata(client);
        struct imx_device *dev = to_imx_sensor(sd);

        if (dev->platform_data->platform_deinit)
                dev->platform_data->platform_deinit();

        media_entity_cleanup(&dev->sd.entity);
        v4l2_ctrl_handler_free(&dev->ctrl_handler);
        dev->platform_data->csi_cfg(sd, 0);
        v4l2_device_unregister_subdev(sd);
        release_msr_list(client, dev->fw);
        kfree(dev);

        return 0;
}

static int __imx_init_ctrl_handler(struct imx_device *dev)
{
        struct v4l2_ctrl_handler *hdl;
        int i;

        hdl = &dev->ctrl_handler;

        v4l2_ctrl_handler_init(&dev->ctrl_handler, ARRAY_SIZE(imx_controls));

        for (i = 0; i < ARRAY_SIZE(imx_controls); i++)
                v4l2_ctrl_new_custom(&dev->ctrl_handler,
                                &imx_controls[i], NULL);

        dev->pixel_rate = v4l2_ctrl_find(&dev->ctrl_handler,
                                V4L2_CID_PIXEL_RATE);
        dev->h_blank = v4l2_ctrl_find(&dev->ctrl_handler,
                                V4L2_CID_HBLANK);
        dev->v_blank = v4l2_ctrl_find(&dev->ctrl_handler,
                                V4L2_CID_VBLANK);
        dev->link_freq = v4l2_ctrl_find(&dev->ctrl_handler,
                                V4L2_CID_LINK_FREQ);
        dev->h_flip = v4l2_ctrl_find(&dev->ctrl_handler,
                                V4L2_CID_HFLIP);
        dev->v_flip = v4l2_ctrl_find(&dev->ctrl_handler,
                                V4L2_CID_VFLIP);
        dev->tp_mode = v4l2_ctrl_find(&dev->ctrl_handler,
                                V4L2_CID_TEST_PATTERN);
        dev->tp_r = v4l2_ctrl_find(&dev->ctrl_handler,
                                V4L2_CID_TEST_PATTERN_COLOR_R);
        dev->tp_gr = v4l2_ctrl_find(&dev->ctrl_handler,
                                V4L2_CID_TEST_PATTERN_COLOR_GR);
        dev->tp_gb = v4l2_ctrl_find(&dev->ctrl_handler,
                                V4L2_CID_TEST_PATTERN_COLOR_GB);
        dev->tp_b = v4l2_ctrl_find(&dev->ctrl_handler,
                                V4L2_CID_TEST_PATTERN_COLOR_B);

        if (dev->ctrl_handler.error || dev->pixel_rate == NULL
                || dev->h_blank == NULL || dev->v_blank == NULL
                || dev->h_flip == NULL || dev->v_flip == NULL
                || dev->link_freq == NULL) {
                return dev->ctrl_handler.error;
        }

        dev->ctrl_handler.lock = &dev->input_lock;
        dev->sd.ctrl_handler = hdl;
        v4l2_ctrl_handler_setup(&dev->ctrl_handler);

        return 0;
}

static void imx_update_reg_info(struct imx_device *dev)
{
        if (dev->sensor_id == IMX219_ID) {
                dev->reg_addr = &imx219_addr;
                dev->param_hold = imx219_param_hold;
                dev->param_update = imx219_param_update;
        } else {
                dev->reg_addr = &imx_addr;
                dev->param_hold = imx_param_hold;
                dev->param_update = imx_param_update;
        }
}

static int imx_probe(struct i2c_client *client,
                         const struct i2c_device_id *id)
{
        struct imx_device *dev;
        struct camera_mipi_info *imx_info = NULL;
        int ret;
        char *msr_file_name = NULL;

        /* allocate sensor device & init sub device */
        dev = kzalloc(sizeof(*dev), GFP_KERNEL);
        if (!dev) {
                v4l2_err(client, "%s: out of memory\n", __func__);
                return -ENOMEM;
        }

        mutex_init(&dev->input_lock);

        dev->i2c_id = id->driver_data;
        dev->fmt_idx = 0;
        dev->sensor_id = IMX_ID_DEFAULT;
        dev->vcm_driver = &imx_vcms[IMX_ID_DEFAULT];
        dev->digital_gain = 256;

        v4l2_i2c_subdev_init(&(dev->sd), client, &imx_ops);

        if (client->dev.platform_data) {
                ret = imx_s_config(&dev->sd, client->irq,
                                       client->dev.platform_data);
                if (ret)
                        goto out_free;
        }
        imx_info = v4l2_get_subdev_hostdata(&dev->sd);

        /*
         * sd->name is updated with sensor driver name by the v4l2.
         * change it to sensor name in this case.
         */
        imx_update_reg_info(dev);
        snprintf(dev->sd.name, sizeof(dev->sd.name), "%s%x %d-%04x",
                IMX_SUBDEV_PREFIX, dev->sensor_id,
                i2c_adapter_id(client->adapter), client->addr);

        ret = __imx_init_ctrl_handler(dev);
        if (ret)
                goto out_ctrl_handler_free;

        dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
        dev->pad.flags = MEDIA_PAD_FL_SOURCE;
        dev->format.code = imx_translate_bayer_order(
                imx_info->raw_bayer_order);
        dev->sd.entity.ops = &imx_entity_ops;
        dev->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;

        ret = media_entity_pads_init(&dev->sd.entity, 1, &dev->pad);
        if (ret) {
                imx_remove(client);
                return ret;
        }

        /* Load the Noise reduction, Dead pixel registers from cpf file*/
        if (dev->platform_data->msr_file_name != NULL)
                msr_file_name = dev->platform_data->msr_file_name();
        if (msr_file_name) {
                ret = load_msr_list(client, msr_file_name, &dev->fw);
                if (ret) {
                        imx_remove(client);
                        return ret;
                }
        } else {
                dev_warn(&client->dev, "Drvb file not present");
        }

        return ret;

out_ctrl_handler_free:
        v4l2_ctrl_handler_free(&dev->ctrl_handler);

out_free:
        v4l2_device_unregister_subdev(&dev->sd);
        kfree(dev);
        return ret;
}

static const struct i2c_device_id imx_ids[] = {
        {IMX_NAME_175, IMX175_ID},
        {IMX_NAME_135, IMX135_ID},
        {IMX_NAME_135_FUJI, IMX135_FUJI_ID},
        {IMX_NAME_134, IMX134_ID},
        {IMX_NAME_132, IMX132_ID},
        {IMX_NAME_208, IMX208_ID},
        {IMX_NAME_219, IMX219_ID},
        {IMX_NAME_227, IMX227_ID},
        {}
};

MODULE_DEVICE_TABLE(i2c, imx_ids);

static struct i2c_driver imx_driver = {
        .driver = {
                .name = IMX_DRIVER,
        },
        .probe = imx_probe,
        .remove = imx_remove,
        .id_table = imx_ids,
};

static __init int init_imx(void)
{
        return i2c_add_driver(&imx_driver);
}

static __exit void exit_imx(void)
{
        i2c_del_driver(&imx_driver);
}

module_init(init_imx);
module_exit(exit_imx);

MODULE_DESCRIPTION("A low-level driver for Sony IMX sensors");
MODULE_AUTHOR("Shenbo Huang <shenbo.huang@intel.com>");
MODULE_LICENSE("GPL");