/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * Copyright (C) 2013 - 2014 Texas Instruments, Inc.
 *
 * Benoit Parrot <bparrot@ti.com>
 * Lad, Prabhakar <prabhakar.csengg@gmail.com>
 *
 * This program is free software; you may redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef AM437X_VPFE_USER_H
#define AM437X_VPFE_USER_H

#include <linux/videodev2.h>

enum vpfe_ccdc_data_size {
        VPFE_CCDC_DATA_16BITS = 0,
        VPFE_CCDC_DATA_15BITS,
        VPFE_CCDC_DATA_14BITS,
        VPFE_CCDC_DATA_13BITS,
        VPFE_CCDC_DATA_12BITS,
        VPFE_CCDC_DATA_11BITS,
        VPFE_CCDC_DATA_10BITS,
        VPFE_CCDC_DATA_8BITS,
};

/* enum for No of pixel per line to be avg. in Black Clamping*/
enum vpfe_ccdc_sample_length {
        VPFE_CCDC_SAMPLE_1PIXELS = 0,
        VPFE_CCDC_SAMPLE_2PIXELS,
        VPFE_CCDC_SAMPLE_4PIXELS,
        VPFE_CCDC_SAMPLE_8PIXELS,
        VPFE_CCDC_SAMPLE_16PIXELS,
};

/* enum for No of lines in Black Clamping */
enum vpfe_ccdc_sample_line {
        VPFE_CCDC_SAMPLE_1LINES = 0,
        VPFE_CCDC_SAMPLE_2LINES,
        VPFE_CCDC_SAMPLE_4LINES,
        VPFE_CCDC_SAMPLE_8LINES,
        VPFE_CCDC_SAMPLE_16LINES,
};

/* enum for Alaw gamma width */
enum vpfe_ccdc_gamma_width {
        VPFE_CCDC_GAMMA_BITS_15_6 = 0,  /* use bits 15-6 for gamma */
        VPFE_CCDC_GAMMA_BITS_14_5,
        VPFE_CCDC_GAMMA_BITS_13_4,
        VPFE_CCDC_GAMMA_BITS_12_3,
        VPFE_CCDC_GAMMA_BITS_11_2,
        VPFE_CCDC_GAMMA_BITS_10_1,
        VPFE_CCDC_GAMMA_BITS_09_0,      /* use bits 9-0 for gamma */
};

/* structure for ALaw */
struct vpfe_ccdc_a_law {
        /* Enable/disable A-Law */
        unsigned char enable;
        /* Gamma Width Input */
        enum vpfe_ccdc_gamma_width gamma_wd;
};

/* structure for Black Clamping */
struct vpfe_ccdc_black_clamp {
        unsigned char enable;
        /* only if bClampEnable is TRUE */
        enum vpfe_ccdc_sample_length sample_pixel;
        /* only if bClampEnable is TRUE */
        enum vpfe_ccdc_sample_line sample_ln;
        /* only if bClampEnable is TRUE */
        unsigned short start_pixel;
        /* only if bClampEnable is TRUE */
        unsigned short sgain;
        /* only if bClampEnable is FALSE */
        unsigned short dc_sub;
};

/* structure for Black Level Compensation */
struct vpfe_ccdc_black_compensation {
        /* Constant value to subtract from Red component */
        char r;
        /* Constant value to subtract from Gr component */
        char gr;
        /* Constant value to subtract from Blue component */
        char b;
        /* Constant value to subtract from Gb component */
        char gb;
};

/* Structure for CCDC configuration parameters for raw capture mode passed
 * by application
 */
struct vpfe_ccdc_config_params_raw {
        /* data size value from 8 to 16 bits */
        enum vpfe_ccdc_data_size data_sz;
        /* Structure for Optional A-Law */
        struct vpfe_ccdc_a_law alaw;
        /* Structure for Optical Black Clamp */
        struct vpfe_ccdc_black_clamp blk_clamp;
        /* Structure for Black Compensation */
        struct vpfe_ccdc_black_compensation blk_comp;
};

/*
 *  Private IOCTL
 * VIDIOC_AM437X_CCDC_CFG - Set CCDC configuration for raw capture
 * This is an experimental ioctl that will change in future kernels. So use
 * this ioctl with care !
 **/
#define VIDIOC_AM437X_CCDC_CFG \
        _IOW('V', BASE_VIDIOC_PRIVATE + 1, void *)

#endif          /* AM437X_VPFE_USER_H */