1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3 * Copyright (c) 2011-2018 Magewell Electronics Co., Ltd. (Nanjing)
4 * All rights reserved.
5 * Author: Yong Deng <yong.deng@magewell.com>
6 */
7
8 #ifndef __SUN6I_CSI_H__
9 #define __SUN6I_CSI_H__
10
11 #include <media/v4l2-device.h>
12 #include <media/v4l2-fwnode.h>
13 #include <media/videobuf2-v4l2.h>
14
15 #include "sun6i_video.h"
16
17 #define SUN6I_CSI_NAME "sun6i-csi"
18 #define SUN6I_CSI_DESCRIPTION "Allwinner A31 CSI Device"
19
20 struct sun6i_csi_buffer {
21 struct vb2_v4l2_buffer v4l2_buffer;
22 struct list_head list;
23
24 dma_addr_t dma_addr;
25 bool queued_to_csi;
26 };
27
28 /**
29 * struct sun6i_csi_config - configs for sun6i csi
30 * @pixelformat: v4l2 pixel format (V4L2_PIX_FMT_*)
31 * @code: media bus format code (MEDIA_BUS_FMT_*)
32 * @field: used interlacing type (enum v4l2_field)
33 * @width: frame width
34 * @height: frame height
35 */
36 struct sun6i_csi_config {
37 u32 pixelformat;
38 u32 code;
39 u32 field;
40 u32 width;
41 u32 height;
42 };
43
44 struct sun6i_csi_v4l2 {
45 struct v4l2_device v4l2_dev;
46 struct media_device media_dev;
47
48 struct v4l2_async_notifier notifier;
49 /* video port settings */
50 struct v4l2_fwnode_endpoint v4l2_ep;
51 };
52
53 struct sun6i_csi_device {
54 struct device *dev;
55
56 struct sun6i_csi_config config;
57 struct sun6i_csi_v4l2 v4l2;
58 struct sun6i_video video;
59
60 struct regmap *regmap;
61 struct clk *clock_mod;
62 struct clk *clock_ram;
63 struct reset_control *reset;
64
65 int planar_offset[3];
66 };
67
68 struct sun6i_csi_variant {
69 unsigned long clock_mod_rate;
70 };
71
72 /**
73 * sun6i_csi_is_format_supported() - check if the format supported by csi
74 * @csi_dev: pointer to the csi device
75 * @pixformat: v4l2 pixel format (V4L2_PIX_FMT_*)
76 * @mbus_code: media bus format code (MEDIA_BUS_FMT_*)
77 *
78 * Return: true if format is supported, false otherwise.
79 */
80 bool sun6i_csi_is_format_supported(struct sun6i_csi_device *csi_dev,
81 u32 pixformat, u32 mbus_code);
82
83 /**
84 * sun6i_csi_set_power() - power on/off the csi
85 * @csi_dev: pointer to the csi device
86 * @enable: on/off
87 *
88 * Return: 0 if successful, error code otherwise.
89 */
90 int sun6i_csi_set_power(struct sun6i_csi_device *csi_dev, bool enable);
91
92 /**
93 * sun6i_csi_update_config() - update the csi register settings
94 * @csi_dev: pointer to the csi device
95 * @config: see struct sun6i_csi_config
96 *
97 * Return: 0 if successful, error code otherwise.
98 */
99 int sun6i_csi_update_config(struct sun6i_csi_device *csi_dev,
100 struct sun6i_csi_config *config);
101
102 /**
103 * sun6i_csi_update_buf_addr() - update the csi frame buffer address
104 * @csi_dev: pointer to the csi device
105 * @addr: frame buffer's physical address
106 */
107 void sun6i_csi_update_buf_addr(struct sun6i_csi_device *csi_dev,
108 dma_addr_t addr);
109
110 /**
111 * sun6i_csi_set_stream() - start/stop csi streaming
112 * @csi_dev: pointer to the csi device
113 * @enable: start/stop
114 */
115 void sun6i_csi_set_stream(struct sun6i_csi_device *csi_dev, bool enable);
116
117 /* get bpp form v4l2 pixformat */
sun6i_csi_get_bpp(unsigned int pixformat)118 static inline int sun6i_csi_get_bpp(unsigned int pixformat)
119 {
120 switch (pixformat) {
121 case V4L2_PIX_FMT_SBGGR8:
122 case V4L2_PIX_FMT_SGBRG8:
123 case V4L2_PIX_FMT_SGRBG8:
124 case V4L2_PIX_FMT_SRGGB8:
125 case V4L2_PIX_FMT_JPEG:
126 return 8;
127 case V4L2_PIX_FMT_SBGGR10:
128 case V4L2_PIX_FMT_SGBRG10:
129 case V4L2_PIX_FMT_SGRBG10:
130 case V4L2_PIX_FMT_SRGGB10:
131 return 10;
132 case V4L2_PIX_FMT_SBGGR12:
133 case V4L2_PIX_FMT_SGBRG12:
134 case V4L2_PIX_FMT_SGRBG12:
135 case V4L2_PIX_FMT_SRGGB12:
136 case V4L2_PIX_FMT_NV12_16L16:
137 case V4L2_PIX_FMT_NV12:
138 case V4L2_PIX_FMT_NV21:
139 case V4L2_PIX_FMT_YUV420:
140 case V4L2_PIX_FMT_YVU420:
141 return 12;
142 case V4L2_PIX_FMT_YUYV:
143 case V4L2_PIX_FMT_YVYU:
144 case V4L2_PIX_FMT_UYVY:
145 case V4L2_PIX_FMT_VYUY:
146 case V4L2_PIX_FMT_NV16:
147 case V4L2_PIX_FMT_NV61:
148 case V4L2_PIX_FMT_YUV422P:
149 case V4L2_PIX_FMT_RGB565:
150 case V4L2_PIX_FMT_RGB565X:
151 return 16;
152 case V4L2_PIX_FMT_RGB24:
153 case V4L2_PIX_FMT_BGR24:
154 return 24;
155 case V4L2_PIX_FMT_RGB32:
156 case V4L2_PIX_FMT_BGR32:
157 return 32;
158 default:
159 WARN(1, "Unsupported pixformat: 0x%x\n", pixformat);
160 break;
161 }
162
163 return 0;
164 }
165
166 #endif /* __SUN6I_CSI_H__ */
167
