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-rw-r--r--include/media/soc_camera.h179
1 files changed, 179 insertions, 0 deletions
diff --git a/include/media/soc_camera.h b/include/media/soc_camera.h
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1/*
2 * camera image capture (abstract) bus driver header
3 *
4 * Copyright (C) 2006, Sascha Hauer, Pengutronix
5 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#ifndef SOC_CAMERA_H
13#define SOC_CAMERA_H
14
15#include <linux/videodev2.h>
16#include <media/videobuf-dma-sg.h>
17
18struct soc_camera_device {
19 struct list_head list;
20 struct device dev;
21 struct device *control;
22 unsigned short width; /* Current window */
23 unsigned short height; /* sizes */
24 unsigned short x_min; /* Camera capabilities */
25 unsigned short y_min;
26 unsigned short x_current; /* Current window location */
27 unsigned short y_current;
28 unsigned short width_min;
29 unsigned short width_max;
30 unsigned short height_min;
31 unsigned short height_max;
32 unsigned short y_skip_top; /* Lines to skip at the top */
33 unsigned short gain;
34 unsigned short exposure;
35 unsigned char iface; /* Host number */
36 unsigned char devnum; /* Device number per host */
37 unsigned char buswidth; /* See comment in .c */
38 struct soc_camera_ops *ops;
39 struct video_device *vdev;
40 const struct soc_camera_data_format *current_fmt;
41 const struct soc_camera_data_format *formats;
42 int num_formats;
43 struct module *owner;
44 /* soc_camera.c private count. Only accessed with video_lock held */
45 int use_count;
46};
47
48struct soc_camera_file {
49 struct soc_camera_device *icd;
50 struct videobuf_queue vb_vidq;
51 spinlock_t *lock;
52};
53
54struct soc_camera_host {
55 struct list_head list;
56 struct device dev;
57 unsigned char nr; /* Host number */
58 size_t msize;
59 struct videobuf_queue_ops *vbq_ops;
60 void *priv;
61 char *drv_name;
62 struct soc_camera_host_ops *ops;
63};
64
65struct soc_camera_host_ops {
66 struct module *owner;
67 int (*add)(struct soc_camera_device *);
68 void (*remove)(struct soc_camera_device *);
69 int (*set_fmt_cap)(struct soc_camera_device *, __u32,
70 struct v4l2_rect *);
71 int (*try_fmt_cap)(struct soc_camera_device *, struct v4l2_format *);
72 int (*reqbufs)(struct soc_camera_file *, struct v4l2_requestbuffers *);
73 int (*querycap)(struct soc_camera_host *, struct v4l2_capability *);
74 int (*try_bus_param)(struct soc_camera_device *, __u32);
75 int (*set_bus_param)(struct soc_camera_device *, __u32);
76 unsigned int (*poll)(struct file *, poll_table *);
77 spinlock_t* (*spinlock_alloc)(struct soc_camera_file *);
78 void (*spinlock_free)(spinlock_t *);
79};
80
81struct soc_camera_link {
82 /* Camera bus id, used to match a camera and a bus */
83 int bus_id;
84 /* GPIO number to switch between 8 and 10 bit modes */
85 unsigned int gpio;
86};
87
88static inline struct soc_camera_device *to_soc_camera_dev(struct device *dev)
89{
90 return container_of(dev, struct soc_camera_device, dev);
91}
92
93static inline struct soc_camera_host *to_soc_camera_host(struct device *dev)
94{
95 return container_of(dev, struct soc_camera_host, dev);
96}
97
98extern int soc_camera_host_register(struct soc_camera_host *ici);
99extern void soc_camera_host_unregister(struct soc_camera_host *ici);
100extern int soc_camera_device_register(struct soc_camera_device *icd);
101extern void soc_camera_device_unregister(struct soc_camera_device *icd);
102
103extern int soc_camera_video_start(struct soc_camera_device *icd);
104extern void soc_camera_video_stop(struct soc_camera_device *icd);
105
106struct soc_camera_data_format {
107 char *name;
108 unsigned int depth;
109 __u32 fourcc;
110 enum v4l2_colorspace colorspace;
111};
112
113struct soc_camera_ops {
114 struct module *owner;
115 int (*probe)(struct soc_camera_device *);
116 void (*remove)(struct soc_camera_device *);
117 int (*init)(struct soc_camera_device *);
118 int (*release)(struct soc_camera_device *);
119 int (*start_capture)(struct soc_camera_device *);
120 int (*stop_capture)(struct soc_camera_device *);
121 int (*set_fmt_cap)(struct soc_camera_device *, __u32,
122 struct v4l2_rect *);
123 int (*try_fmt_cap)(struct soc_camera_device *, struct v4l2_format *);
124 unsigned long (*query_bus_param)(struct soc_camera_device *);
125 int (*set_bus_param)(struct soc_camera_device *, unsigned long);
126 int (*get_chip_id)(struct soc_camera_device *,
127 struct v4l2_chip_ident *);
128#ifdef CONFIG_VIDEO_ADV_DEBUG
129 int (*get_register)(struct soc_camera_device *, struct v4l2_register *);
130 int (*set_register)(struct soc_camera_device *, struct v4l2_register *);
131#endif
132 int (*get_control)(struct soc_camera_device *, struct v4l2_control *);
133 int (*set_control)(struct soc_camera_device *, struct v4l2_control *);
134 const struct v4l2_queryctrl *controls;
135 int num_controls;
136};
137
138static inline struct v4l2_queryctrl const *soc_camera_find_qctrl(
139 struct soc_camera_ops *ops, int id)
140{
141 int i;
142
143 for (i = 0; i < ops->num_controls; i++)
144 if (ops->controls[i].id == id)
145 return &ops->controls[i];
146
147 return NULL;
148}
149
150#define SOCAM_MASTER (1 << 0)
151#define SOCAM_SLAVE (1 << 1)
152#define SOCAM_HSYNC_ACTIVE_HIGH (1 << 2)
153#define SOCAM_HSYNC_ACTIVE_LOW (1 << 3)
154#define SOCAM_VSYNC_ACTIVE_HIGH (1 << 4)
155#define SOCAM_VSYNC_ACTIVE_LOW (1 << 5)
156#define SOCAM_DATAWIDTH_8 (1 << 6)
157#define SOCAM_DATAWIDTH_9 (1 << 7)
158#define SOCAM_DATAWIDTH_10 (1 << 8)
159#define SOCAM_PCLK_SAMPLE_RISING (1 << 9)
160#define SOCAM_PCLK_SAMPLE_FALLING (1 << 10)
161
162#define SOCAM_DATAWIDTH_MASK (SOCAM_DATAWIDTH_8 | SOCAM_DATAWIDTH_9 | \
163 SOCAM_DATAWIDTH_10)
164
165static inline unsigned long soc_camera_bus_param_compatible(
166 unsigned long camera_flags, unsigned long bus_flags)
167{
168 unsigned long common_flags, hsync, vsync, pclk;
169
170 common_flags = camera_flags & bus_flags;
171
172 hsync = common_flags & (SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW);
173 vsync = common_flags & (SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW);
174 pclk = common_flags & (SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING);
175
176 return (!hsync || !vsync || !pclk) ? 0 : common_flags;
177}
178
179#endif
generated by cgit v1.2.2 (git 2.25.0) at 2025-03-07 23:09:48 -0500