LXR linux/drivers/media/platform/davinci/vpif

   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 */
  38enum vpif_channel_id {
  39        VPIF_CHANNEL0_VIDEO = 0,
  40        VPIF_CHANNEL1_VIDEO,
  41};
  42
  43struct 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
  50struct vpif_cap_buffer {
  51        struct vb2_v4l2_buffer vb;
  52        struct list_head list;
  53};
  54
  55struct 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
  87struct 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
 108struct 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 */
 117