include/uapi/linux/am437x-vpfe.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 /*
   3  * Copyright (C) 2013 - 2014 Texas Instruments, Inc.
   4  *
   5  * Benoit Parrot <bparrot@ti.com>
   6  * Lad, Prabhakar <prabhakar.csengg@gmail.com>
   7  *
   8  * This program is free software; you may redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; version 2 of the License.
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  13  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  14  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  15  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  16  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  17  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  18  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  19  * SOFTWARE.
  20  */
  21
  22 #ifndef AM437X_VPFE_USER_H
  23 #define AM437X_VPFE_USER_H
  24
  25 #include <linux/videodev2.h>
  26
  27 enum vpfe_ccdc_data_size {
  28         VPFE_CCDC_DATA_16BITS = 0,
  29         VPFE_CCDC_DATA_15BITS,
  30         VPFE_CCDC_DATA_14BITS,
  31         VPFE_CCDC_DATA_13BITS,
  32         VPFE_CCDC_DATA_12BITS,
  33         VPFE_CCDC_DATA_11BITS,
  34         VPFE_CCDC_DATA_10BITS,
  35         VPFE_CCDC_DATA_8BITS,
  36 };
  37
  38 /* enum for No of pixel per line to be avg. in Black Clamping*/
  39 enum vpfe_ccdc_sample_length {
  40         VPFE_CCDC_SAMPLE_1PIXELS = 0,
  41         VPFE_CCDC_SAMPLE_2PIXELS,
  42         VPFE_CCDC_SAMPLE_4PIXELS,
  43         VPFE_CCDC_SAMPLE_8PIXELS,
  44         VPFE_CCDC_SAMPLE_16PIXELS,
  45 };
  46
  47 /* enum for No of lines in Black Clamping */
  48 enum vpfe_ccdc_sample_line {
  49         VPFE_CCDC_SAMPLE_1LINES = 0,
  50         VPFE_CCDC_SAMPLE_2LINES,
  51         VPFE_CCDC_SAMPLE_4LINES,
  52         VPFE_CCDC_SAMPLE_8LINES,
  53         VPFE_CCDC_SAMPLE_16LINES,
  54 };
  55
  56 /* enum for Alaw gamma width */
  57 enum vpfe_ccdc_gamma_width {
  58         VPFE_CCDC_GAMMA_BITS_15_6 = 0,  /* use bits 15-6 for gamma */
  59         VPFE_CCDC_GAMMA_BITS_14_5,
  60         VPFE_CCDC_GAMMA_BITS_13_4,
  61         VPFE_CCDC_GAMMA_BITS_12_3,
  62         VPFE_CCDC_GAMMA_BITS_11_2,
  63         VPFE_CCDC_GAMMA_BITS_10_1,
  64         VPFE_CCDC_GAMMA_BITS_09_0,      /* use bits 9-0 for gamma */
  65 };
  66
  67 /* structure for ALaw */
  68 struct vpfe_ccdc_a_law {
  69         /* Enable/disable A-Law */
  70         unsigned char enable;
  71         /* Gamma Width Input */
  72         enum vpfe_ccdc_gamma_width gamma_wd;
  73 };
  74
  75 /* structure for Black Clamping */
  76 struct vpfe_ccdc_black_clamp {
  77         unsigned char enable;
  78         /* only if bClampEnable is TRUE */
  79         enum vpfe_ccdc_sample_length sample_pixel;
  80         /* only if bClampEnable is TRUE */
  81         enum vpfe_ccdc_sample_line sample_ln;
  82         /* only if bClampEnable is TRUE */
  83         unsigned short start_pixel;
  84         /* only if bClampEnable is TRUE */
  85         unsigned short sgain;
  86         /* only if bClampEnable is FALSE */
  87         unsigned short dc_sub;
  88 };
  89
  90 /* structure for Black Level Compensation */
  91 struct vpfe_ccdc_black_compensation {
  92         /* Constant value to subtract from Red component */
  93         char r;
  94         /* Constant value to subtract from Gr component */
  95         char gr;
  96         /* Constant value to subtract from Blue component */
  97         char b;
  98         /* Constant value to subtract from Gb component */
  99         char gb;
 100 };
 101
 102 /* Structure for CCDC configuration parameters for raw capture mode passed
 103  * by application
 104  */
 105 struct vpfe_ccdc_config_params_raw {
 106         /* data size value from 8 to 16 bits */
 107         enum vpfe_ccdc_data_size data_sz;
 108         /* Structure for Optional A-Law */
 109         struct vpfe_ccdc_a_law alaw;
 110         /* Structure for Optical Black Clamp */
 111         struct vpfe_ccdc_black_clamp blk_clamp;
 112         /* Structure for Black Compensation */
 113         struct vpfe_ccdc_black_compensation blk_comp;
 114 };
 115
 116 /*
 117  *  Private IOCTL
 118  * VIDIOC_AM437X_CCDC_CFG - Set CCDC configuration for raw capture
 119  * This is an experimental ioctl that will change in future kernels. So use
 120  * this ioctl with care !
 121  **/
 122 #define VIDIOC_AM437X_CCDC_CFG \
 123         _IOW('V', BASE_VIDIOC_PRIVATE + 1, void *)
 124
 125 #endif          /* AM437X_VPFE_USER_H */