include/media/soc_camera.h

   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
  18 struct 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 cached_datawidth; /* 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         int (*probe)(struct soc_camera_device *icd);
  42         void (*remove)(struct soc_camera_device *icd);
  43         struct module *owner;
  44 };
  45
  46 struct soc_camera_file {
  47         struct soc_camera_device *icd;
  48         struct videobuf_queue vb_vidq;
  49 };
  50
  51 struct soc_camera_host {
  52         struct list_head list;
  53         struct device dev;
  54         unsigned char nr;                               /* Host number */
  55         size_t msize;
  56         struct videobuf_queue_ops *vbq_ops;
  57         struct module *owner;
  58         void *priv;
  59         char *drv_name;
  60         int (*add)(struct soc_camera_device *);
  61         void (*remove)(struct soc_camera_device *);
  62         int (*set_capture_format)(struct soc_camera_device *, __u32,
  63                                   struct v4l2_rect *);
  64         int (*try_fmt_cap)(struct soc_camera_host *, struct v4l2_format *);
  65         int (*reqbufs)(struct soc_camera_file *, struct v4l2_requestbuffers *);
  66         int (*querycap)(struct soc_camera_host *, struct v4l2_capability *);
  67         unsigned int (*poll)(struct file *, poll_table *);
  68 };
  69
  70 struct soc_camera_link {
  71         /* Camera bus id, used to match a camera and a bus */
  72         int bus_id;
  73         /* GPIO number to switch between 8 and 10 bit modes */
  74         unsigned int gpio;
  75 };
  76
  77 static inline struct soc_camera_device *to_soc_camera_dev(struct device *dev)
  78 {
  79         return container_of(dev, struct soc_camera_device, dev);
  80 }
  81
  82 static inline struct soc_camera_host *to_soc_camera_host(struct device *dev)
  83 {
  84         return container_of(dev, struct soc_camera_host, dev);
  85 }
  86
  87 extern int soc_camera_host_register(struct soc_camera_host *ici,
  88                                      struct module *owner);
  89 extern void soc_camera_host_unregister(struct soc_camera_host *ici);
  90 extern int soc_camera_device_register(struct soc_camera_device *icd);
  91 extern void soc_camera_device_unregister(struct soc_camera_device *icd);
  92
  93 extern int soc_camera_video_start(struct soc_camera_device *icd);
  94 extern void soc_camera_video_stop(struct soc_camera_device *icd);
  95
  96 struct soc_camera_data_format {
  97         char *name;
  98         unsigned int depth;
  99         __u32 fourcc;
 100         enum v4l2_colorspace colorspace;
 101 };
 102
 103 struct soc_camera_ops {
 104         struct module *owner;
 105         int (*init)(struct soc_camera_device *);
 106         int (*release)(struct soc_camera_device *);
 107         int (*start_capture)(struct soc_camera_device *);
 108         int (*stop_capture)(struct soc_camera_device *);
 109         int (*set_capture_format)(struct soc_camera_device *, __u32,
 110                                   struct v4l2_rect *, unsigned int);
 111         int (*try_fmt_cap)(struct soc_camera_device *, struct v4l2_format *);
 112         int (*get_chip_id)(struct soc_camera_device *,
 113                            struct v4l2_chip_ident *);
 114 #ifdef CONFIG_VIDEO_ADV_DEBUG
 115         int (*get_register)(struct soc_camera_device *, struct v4l2_register *);
 116         int (*set_register)(struct soc_camera_device *, struct v4l2_register *);
 117 #endif
 118         const struct soc_camera_data_format *formats;
 119         int num_formats;
 120         int (*get_control)(struct soc_camera_device *, struct v4l2_control *);
 121         int (*set_control)(struct soc_camera_device *, struct v4l2_control *);
 122         const struct v4l2_queryctrl *controls;
 123         int num_controls;
 124         unsigned int(*get_datawidth)(struct soc_camera_device *icd);
 125 };
 126
 127 static inline struct v4l2_queryctrl const *soc_camera_find_qctrl(
 128         struct soc_camera_ops *ops, int id)
 129 {
 130         int i;
 131
 132         for (i = 0; i < ops->num_controls; i++)
 133                 if (ops->controls[i].id == id)
 134                         return &ops->controls[i];
 135
 136         return NULL;
 137 }
 138
 139 #define IS_MASTER               (1<<0)
 140 #define IS_HSYNC_ACTIVE_HIGH    (1<<1)
 141 #define IS_VSYNC_ACTIVE_HIGH    (1<<2)
 142 #define IS_DATAWIDTH_8          (1<<3)
 143 #define IS_DATAWIDTH_9          (1<<4)
 144 #define IS_DATAWIDTH_10         (1<<5)
 145 #define IS_PCLK_SAMPLE_RISING   (1<<6)
 146
 147 #endif