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
27enum 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*/
39enum 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 */
48enum 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 */
57enum 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 */
68struct 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 */
76struct 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 */
91struct 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 */
105struct 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 */
126