drivers/media/platform/davinci/vpif_capture.h

   1 /*
   2  * Copyright (C) 2009 Texas Instruments Inc
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #ifndef VPIF_CAPTURE_H
  16 #define VPIF_CAPTURE_H
  17
  18 /* Header files */
  19 #include <media/videobuf2-dma-contig.h>
  20 #include <media/v4l2-device.h>
  21
  22 #include "vpif.h"
  23
  24 /* Macros */
  25 #define VPIF_CAPTURE_VERSION            "0.0.2"
  26
  27 #define VPIF_VALID_FIELD(field)         (((V4L2_FIELD_ANY == field) || \
  28         (V4L2_FIELD_NONE == field)) || \
  29         (((V4L2_FIELD_INTERLACED == field) || \
  30         (V4L2_FIELD_SEQ_TB == field)) || \
  31         (V4L2_FIELD_SEQ_BT == field)))
  32
  33 #define VPIF_CAPTURE_MAX_DEVICES        2
  34 #define VPIF_VIDEO_INDEX                0
  35 #define VPIF_NUMBER_OF_OBJECTS          1
  36
  37 /* Enumerated data type to give id to each device per channel */
  38 enum vpif_channel_id {
  39         VPIF_CHANNEL0_VIDEO = 0,
  40         VPIF_CHANNEL1_VIDEO,
  41 };
  42
  43 struct video_obj {
  44         enum v4l2_field buf_field;
  45         /* Currently selected or default standard */
  46         v4l2_std_id stdid;
  47         struct v4l2_dv_timings dv_timings;
  48 };
  49
  50 struct vpif_cap_buffer {
  51         struct vb2_v4l2_buffer vb;
  52         struct list_head list;
  53 };
  54
  55 struct common_obj {
  56         /* Pointer pointing to current v4l2_buffer */
  57         struct vpif_cap_buffer *cur_frm;
  58         /* Pointer pointing to current v4l2_buffer */
  59         struct vpif_cap_buffer *next_frm;
  60         /* Used to store pixel format */
  61         struct v4l2_format fmt;
  62         /* Buffer queue used in video-buf */
  63         struct vb2_queue buffer_queue;
  64         /* Queue of filled frames */
  65         struct list_head dma_queue;
  66         /* Protects the dma_queue field */
  67         spinlock_t irqlock;
  68         /* lock used to access this structure */
  69         struct mutex lock;
  70         /* Function pointer to set the addresses */
  71         void (*set_addr) (unsigned long, unsigned long, unsigned long,
  72                           unsigned long);
  73         /* offset where Y top starts from the starting of the buffer */
  74         u32 ytop_off;
  75         /* offset where Y bottom starts from the starting of the buffer */
  76         u32 ybtm_off;
  77         /* offset where C top starts from the starting of the buffer */
  78         u32 ctop_off;
  79         /* offset where C bottom starts from the starting of the buffer */
  80         u32 cbtm_off;
  81         /* Indicates width of the image data */
  82         u32 width;
  83         /* Indicates height of the image data */
  84         u32 height;
  85 };
  86
  87 struct channel_obj {
  88         /* Identifies video device for this channel */
  89         struct video_device video_dev;
  90         /* Indicates id of the field which is being displayed */
  91         u32 field_id;
  92         /* flag to indicate whether decoder is initialized */
  93         u8 initialized;
  94         /* Identifies channel */
  95         enum vpif_channel_id channel_id;
  96         /* Current input */
  97         u32 input_idx;
  98         /* subdev corresponding to the current input, may be NULL */
  99         struct v4l2_subdev *sd;
 100         /* vpif configuration params */
 101         struct vpif_params vpifparams;
 102         /* common object array */
 103         struct common_obj common[VPIF_NUMBER_OF_OBJECTS];
 104         /* video object */
 105         struct video_obj video;
 106 };
 107
 108 struct vpif_device {
 109         struct v4l2_device v4l2_dev;
 110         struct channel_obj *dev[VPIF_CAPTURE_NUM_CHANNELS];
 111         struct v4l2_subdev **sd;
 112         struct v4l2_async_notifier notifier;
 113         struct vpif_capture_config *config;
 114 };
 115
 116 #endif                          /* VPIF_CAPTURE_H */