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  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #ifndef VPIF_CAPTURE_H
  20 #define VPIF_CAPTURE_H
  21
  22 /* Header files */
  23 #include <media/videobuf2-dma-contig.h>
  24 #include <media/v4l2-device.h>
  25
  26 #include "vpif.h"
  27
  28 /* Macros */
  29 #define VPIF_CAPTURE_VERSION            "0.0.2"
  30
  31 #define VPIF_VALID_FIELD(field)         (((V4L2_FIELD_ANY == field) || \
  32         (V4L2_FIELD_NONE == field)) || \
  33         (((V4L2_FIELD_INTERLACED == field) || \
  34         (V4L2_FIELD_SEQ_TB == field)) || \
  35         (V4L2_FIELD_SEQ_BT == field)))
  36
  37 #define VPIF_CAPTURE_MAX_DEVICES        2
  38 #define VPIF_VIDEO_INDEX                0
  39 #define VPIF_NUMBER_OF_OBJECTS          1
  40
  41 /* Enumerated data type to give id to each device per channel */
  42 enum vpif_channel_id {
  43         VPIF_CHANNEL0_VIDEO = 0,
  44         VPIF_CHANNEL1_VIDEO,
  45 };
  46
  47 struct video_obj {
  48         enum v4l2_field buf_field;
  49         /* Currently selected or default standard */
  50         v4l2_std_id stdid;
  51         struct v4l2_dv_timings dv_timings;
  52 };
  53
  54 struct vpif_cap_buffer {
  55         struct vb2_v4l2_buffer vb;
  56         struct list_head list;
  57 };
  58
  59 struct common_obj {
  60         /* Pointer pointing to current v4l2_buffer */
  61         struct vpif_cap_buffer *cur_frm;
  62         /* Pointer pointing to current v4l2_buffer */
  63         struct vpif_cap_buffer *next_frm;
  64         /* Used to store pixel format */
  65         struct v4l2_format fmt;
  66         /* Buffer queue used in video-buf */
  67         struct vb2_queue buffer_queue;
  68         /* allocator-specific contexts for each plane */
  69         struct vb2_alloc_ctx *alloc_ctx;
  70         /* Queue of filled frames */
  71         struct list_head dma_queue;
  72         /* Used in video-buf */
  73         spinlock_t irqlock;
  74         /* lock used to access this structure */
  75         struct mutex lock;
  76         /* Function pointer to set the addresses */
  77         void (*set_addr) (unsigned long, unsigned long, unsigned long,
  78                           unsigned long);
  79         /* offset where Y top starts from the starting of the buffer */
  80         u32 ytop_off;
  81         /* offset where Y bottom starts from the starting of the buffer */
  82         u32 ybtm_off;
  83         /* offset where C top starts from the starting of the buffer */
  84         u32 ctop_off;
  85         /* offset where C bottom starts from the starting of the buffer */
  86         u32 cbtm_off;
  87         /* Indicates width of the image data */
  88         u32 width;
  89         /* Indicates height of the image data */
  90         u32 height;
  91 };
  92
  93 struct channel_obj {
  94         /* Identifies video device for this channel */
  95         struct video_device video_dev;
  96         /* Indicates id of the field which is being displayed */
  97         u32 field_id;
  98         /* flag to indicate whether decoder is initialized */
  99         u8 initialized;
 100         /* Identifies channel */
 101         enum vpif_channel_id channel_id;
 102         /* Current input */
 103         u32 input_idx;
 104         /* subdev corresponding to the current input, may be NULL */
 105         struct v4l2_subdev *sd;
 106         /* vpif configuration params */
 107         struct vpif_params vpifparams;
 108         /* common object array */
 109         struct common_obj common[VPIF_NUMBER_OF_OBJECTS];
 110         /* video object */
 111         struct video_obj video;
 112 };
 113
 114 struct vpif_device {
 115         struct v4l2_device v4l2_dev;
 116         struct channel_obj *dev[VPIF_CAPTURE_NUM_CHANNELS];
 117         struct v4l2_subdev **sd;
 118         struct v4l2_async_notifier notifier;
 119         struct vpif_capture_config *config;
 120 };
 121
 122 #endif                          /* VPIF_CAPTURE_H */