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 #ifdef __KERNEL__
  23
  24 /* Header files */
  25 #include <media/videobuf2-dma-contig.h>
  26 #include <media/v4l2-device.h>
  27
  28 #include "vpif.h"
  29
  30 /* Macros */
  31 #define VPIF_CAPTURE_VERSION            "0.0.2"
  32
  33 #define VPIF_VALID_FIELD(field)         (((V4L2_FIELD_ANY == field) || \
  34         (V4L2_FIELD_NONE == field)) || \
  35         (((V4L2_FIELD_INTERLACED == field) || \
  36         (V4L2_FIELD_SEQ_TB == field)) || \
  37         (V4L2_FIELD_SEQ_BT == field)))
  38
  39 #define VPIF_CAPTURE_MAX_DEVICES        2
  40 #define VPIF_VIDEO_INDEX                0
  41 #define VPIF_NUMBER_OF_OBJECTS          1
  42
  43 /* Enumerated data type to give id to each device per channel */
  44 enum vpif_channel_id {
  45         VPIF_CHANNEL0_VIDEO = 0,
  46         VPIF_CHANNEL1_VIDEO,
  47 };
  48
  49 struct video_obj {
  50         enum v4l2_field buf_field;
  51         /* Currently selected or default standard */
  52         v4l2_std_id stdid;
  53         struct v4l2_dv_timings dv_timings;
  54 };
  55
  56 struct vpif_cap_buffer {
  57         struct vb2_buffer vb;
  58         struct list_head list;
  59 };
  60
  61 struct common_obj {
  62         /* Pointer pointing to current v4l2_buffer */
  63         struct vpif_cap_buffer *cur_frm;
  64         /* Pointer pointing to current v4l2_buffer */
  65         struct vpif_cap_buffer *next_frm;
  66         /*
  67          * This field keeps track of type of buffer exchange mechanism
  68          * user has selected
  69          */
  70         enum v4l2_memory memory;
  71         /* Used to store pixel format */
  72         struct v4l2_format fmt;
  73         /* Buffer queue used in video-buf */
  74         struct vb2_queue buffer_queue;
  75         /* allocator-specific contexts for each plane */
  76         struct vb2_alloc_ctx *alloc_ctx;
  77         /* Queue of filled frames */
  78         struct list_head dma_queue;
  79         /* Used in video-buf */
  80         spinlock_t irqlock;
  81         /* lock used to access this structure */
  82         struct mutex lock;
  83         /* number of users performing IO */
  84         u32 io_usrs;
  85         /* Indicates whether streaming started */
  86         u8 started;
  87         /* Function pointer to set the addresses */
  88         void (*set_addr) (unsigned long, unsigned long, unsigned long,
  89                           unsigned long);
  90         /* offset where Y top starts from the starting of the buffer */
  91         u32 ytop_off;
  92         /* offset where Y bottom starts from the starting of the buffer */
  93         u32 ybtm_off;
  94         /* offset where C top starts from the starting of the buffer */
  95         u32 ctop_off;
  96         /* offset where C bottom starts from the starting of the buffer */
  97         u32 cbtm_off;
  98         /* Indicates width of the image data */
  99         u32 width;
 100         /* Indicates height of the image data */
 101         u32 height;
 102 };
 103
 104 struct channel_obj {
 105         /* Identifies video device for this channel */
 106         struct video_device *video_dev;
 107         /* Used to keep track of state of the priority */
 108         struct v4l2_prio_state prio;
 109         /* number of open instances of the channel */
 110         int usrs;
 111         /* Indicates id of the field which is being displayed */
 112         u32 field_id;
 113         /* flag to indicate whether decoder is initialized */
 114         u8 initialized;
 115         /* Identifies channel */
 116         enum vpif_channel_id channel_id;
 117         /* Current input */
 118         u32 input_idx;
 119         /* subdev corresponding to the current input, may be NULL */
 120         struct v4l2_subdev *sd;
 121         /* vpif configuration params */
 122         struct vpif_params vpifparams;
 123         /* common object array */
 124         struct common_obj common[VPIF_NUMBER_OF_OBJECTS];
 125         /* video object */
 126         struct video_obj video;
 127 };
 128
 129 /* File handle structure */
 130 struct vpif_fh {
 131         /* pointer to channel object for opened device */
 132         struct channel_obj *channel;
 133         /* Indicates whether this file handle is doing IO */
 134         u8 io_allowed[VPIF_NUMBER_OF_OBJECTS];
 135         /* Used to keep track priority of this instance */
 136         enum v4l2_priority prio;
 137         /* Used to indicate channel is initialize or not */
 138         u8 initialized;
 139 };
 140
 141 struct vpif_device {
 142         struct v4l2_device v4l2_dev;
 143         struct channel_obj *dev[VPIF_CAPTURE_NUM_CHANNELS];
 144         struct v4l2_subdev **sd;
 145         struct v4l2_async_notifier notifier;
 146         struct vpif_capture_config *config;
 147 };
 148
 149 struct vpif_config_params {
 150         u8 min_numbuffers;
 151         u8 numbuffers[VPIF_CAPTURE_NUM_CHANNELS];
 152         s8 device_type;
 153         u32 min_bufsize[VPIF_CAPTURE_NUM_CHANNELS];
 154         u32 channel_bufsize[VPIF_CAPTURE_NUM_CHANNELS];
 155         u8 default_device[VPIF_CAPTURE_NUM_CHANNELS];
 156         u32 video_limit[VPIF_CAPTURE_NUM_CHANNELS];
 157         u8 max_device_type;
 158 };
 159
 160 #endif                          /* End of __KERNEL__ */
 161 #endif                          /* VPIF_CAPTURE_H */