uapi/linux/am437x-vpfe.h

0001 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
0002 /*
0003  * Copyright (C) 2013 - 2014 Texas Instruments, Inc.
0004  *
0005  * Benoit Parrot <bparrot@ti.com>
0006  * Lad, Prabhakar <prabhakar.csengg@gmail.com>
0007  *
0008  * This program is free software; you may redistribute it and/or modify
0009  * it under the terms of the GNU General Public License as published by
0010  * the Free Software Foundation; version 2 of the License.
0011  *
0012  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
0013  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
0014  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
0015  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
0016  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
0017  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
0018  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
0019  * SOFTWARE.
0020  */
0021
0022 #ifndef AM437X_VPFE_USER_H
0023 #define AM437X_VPFE_USER_H
0024
0025 #include <linux/videodev2.h>
0026
0027 enum vpfe_ccdc_data_size {
0028     VPFE_CCDC_DATA_16BITS = 0,
0029     VPFE_CCDC_DATA_15BITS,
0030     VPFE_CCDC_DATA_14BITS,
0031     VPFE_CCDC_DATA_13BITS,
0032     VPFE_CCDC_DATA_12BITS,
0033     VPFE_CCDC_DATA_11BITS,
0034     VPFE_CCDC_DATA_10BITS,
0035     VPFE_CCDC_DATA_8BITS,
0036 };
0037
0038 /* enum for No of pixel per line to be avg. in Black Clamping*/
0039 enum vpfe_ccdc_sample_length {
0040     VPFE_CCDC_SAMPLE_1PIXELS = 0,
0041     VPFE_CCDC_SAMPLE_2PIXELS,
0042     VPFE_CCDC_SAMPLE_4PIXELS,
0043     VPFE_CCDC_SAMPLE_8PIXELS,
0044     VPFE_CCDC_SAMPLE_16PIXELS,
0045 };
0046
0047 /* enum for No of lines in Black Clamping */
0048 enum vpfe_ccdc_sample_line {
0049     VPFE_CCDC_SAMPLE_1LINES = 0,
0050     VPFE_CCDC_SAMPLE_2LINES,
0051     VPFE_CCDC_SAMPLE_4LINES,
0052     VPFE_CCDC_SAMPLE_8LINES,
0053     VPFE_CCDC_SAMPLE_16LINES,
0054 };
0055
0056 /* enum for Alaw gamma width */
0057 enum vpfe_ccdc_gamma_width {
0058     VPFE_CCDC_GAMMA_BITS_15_6 = 0,  /* use bits 15-6 for gamma */
0059     VPFE_CCDC_GAMMA_BITS_14_5,
0060     VPFE_CCDC_GAMMA_BITS_13_4,
0061     VPFE_CCDC_GAMMA_BITS_12_3,
0062     VPFE_CCDC_GAMMA_BITS_11_2,
0063     VPFE_CCDC_GAMMA_BITS_10_1,
0064     VPFE_CCDC_GAMMA_BITS_09_0,  /* use bits 9-0 for gamma */
0065 };
0066
0067 /* structure for ALaw */
0068 struct vpfe_ccdc_a_law {
0069     /* Enable/disable A-Law */
0070     unsigned char enable;
0071     /* Gamma Width Input */
0072     enum vpfe_ccdc_gamma_width gamma_wd;
0073 };
0074
0075 /* structure for Black Clamping */
0076 struct vpfe_ccdc_black_clamp {
0077     unsigned char enable;
0078     /* only if bClampEnable is TRUE */
0079     enum vpfe_ccdc_sample_length sample_pixel;
0080     /* only if bClampEnable is TRUE */
0081     enum vpfe_ccdc_sample_line sample_ln;
0082     /* only if bClampEnable is TRUE */
0083     unsigned short start_pixel;
0084     /* only if bClampEnable is TRUE */
0085     unsigned short sgain;
0086     /* only if bClampEnable is FALSE */
0087     unsigned short dc_sub;
0088 };
0089
0090 /* structure for Black Level Compensation */
0091 struct vpfe_ccdc_black_compensation {
0092     /* Constant value to subtract from Red component */
0093     char r;
0094     /* Constant value to subtract from Gr component */
0095     char gr;
0096     /* Constant value to subtract from Blue component */
0097     char b;
0098     /* Constant value to subtract from Gb component */
0099     char gb;
0100 };
0101
0102 /* Structure for CCDC configuration parameters for raw capture mode passed
0103  * by application
0104  */
0105 struct vpfe_ccdc_config_params_raw {
0106     /* data size value from 8 to 16 bits */
0107     enum vpfe_ccdc_data_size data_sz;
0108     /* Structure for Optional A-Law */
0109     struct vpfe_ccdc_a_law alaw;
0110     /* Structure for Optical Black Clamp */
0111     struct vpfe_ccdc_black_clamp blk_clamp;
0112     /* Structure for Black Compensation */
0113     struct vpfe_ccdc_black_compensation blk_comp;
0114 };
0115
0116 /*
0117  *  Private IOCTL
0118  * VIDIOC_AM437X_CCDC_CFG - Set CCDC configuration for raw capture
0119  * This is an experimental ioctl that will change in future kernels. So use
0120  * this ioctl with care !
0121  **/
0122 #define VIDIOC_AM437X_CCDC_CFG \
0123     _IOW('V', BASE_VIDIOC_PRIVATE + 1, void *)
0124
0125 #endif      /* AM437X_VPFE_USER_H */