drivers/media/video/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 <linux/videodev2.h>
  26 #include <media/v4l2-common.h>
  27 #include <media/v4l2-device.h>
  28 #include <media/videobuf-core.h>
  29 #include <media/videobuf2-dma-contig.h>
  30 #include <media/davinci/vpif_types.h>
  31
  32 #include "vpif.h"
  33
  34 /* Macros */
  35 #define VPIF_CAPTURE_VERSION            "0.0.2"
  36
  37 #define VPIF_VALID_FIELD(field)         (((V4L2_FIELD_ANY == field) || \
  38         (V4L2_FIELD_NONE == field)) || \
  39         (((V4L2_FIELD_INTERLACED == field) || \
  40         (V4L2_FIELD_SEQ_TB == field)) || \
  41         (V4L2_FIELD_SEQ_BT == field)))
  42
  43 #define VPIF_CAPTURE_MAX_DEVICES        2
  44 #define VPIF_VIDEO_INDEX                0
  45 #define VPIF_NUMBER_OF_OBJECTS          1
  46
  47 /* Enumerated data type to give id to each device per channel */
  48 enum vpif_channel_id {
  49         VPIF_CHANNEL0_VIDEO = 0,
  50         VPIF_CHANNEL1_VIDEO,
  51 };
  52
  53 struct video_obj {
  54         enum v4l2_field buf_field;
  55         /* Currently selected or default standard */
  56         v4l2_std_id stdid;
  57         u32 dv_preset;
  58         struct v4l2_bt_timings bt_timings;
  59         /* This is to track the last input that is passed to application */
  60         u32 input_idx;
  61 };
  62
  63 struct vpif_cap_buffer {
  64         struct vb2_buffer vb;
  65         struct list_head list;
  66 };
  67
  68 struct common_obj {
  69         /* Pointer pointing to current v4l2_buffer */
  70         struct vpif_cap_buffer *cur_frm;
  71         /* Pointer pointing to current v4l2_buffer */
  72         struct vpif_cap_buffer *next_frm;
  73         /*
  74          * This field keeps track of type of buffer exchange mechanism
  75          * user has selected
  76          */
  77         enum v4l2_memory memory;
  78         /* Used to store pixel format */
  79         struct v4l2_format fmt;
  80         /* Buffer queue used in video-buf */
  81         struct vb2_queue buffer_queue;
  82         /* allocator-specific contexts for each plane */
  83         struct vb2_alloc_ctx *alloc_ctx;
  84         /* Queue of filled frames */
  85         struct list_head dma_queue;
  86         /* Used in video-buf */
  87         spinlock_t irqlock;
  88         /* lock used to access this structure */
  89         struct mutex lock;
  90         /* number of users performing IO */
  91         u32 io_usrs;
  92         /* Indicates whether streaming started */
  93         u8 started;
  94         /* Function pointer to set the addresses */
  95         void (*set_addr) (unsigned long, unsigned long, unsigned long,
  96                           unsigned long);
  97         /* offset where Y top starts from the starting of the buffer */
  98         u32 ytop_off;
  99         /* offset where Y bottom starts from the starting of the buffer */
 100         u32 ybtm_off;
 101         /* offset where C top starts from the starting of the buffer */
 102         u32 ctop_off;
 103         /* offset where C bottom starts from the starting of the buffer */
 104         u32 cbtm_off;
 105         /* Indicates width of the image data */
 106         u32 width;
 107         /* Indicates height of the image data */
 108         u32 height;
 109 };
 110
 111 struct channel_obj {
 112         /* Identifies video device for this channel */
 113         struct video_device *video_dev;
 114         /* Used to keep track of state of the priority */
 115         struct v4l2_prio_state prio;
 116         /* number of open instances of the channel */
 117         int usrs;
 118         /* Indicates id of the field which is being displayed */
 119         u32 field_id;
 120         /* flag to indicate whether decoder is initialized */
 121         u8 initialized;
 122         /* Identifies channel */
 123         enum vpif_channel_id channel_id;
 124         /* index into sd table */
 125         int curr_sd_index;
 126         /* ptr to current sub device information */
 127         struct vpif_subdev_info *curr_subdev_info;
 128         /* vpif configuration params */
 129         struct vpif_params vpifparams;
 130         /* common object array */
 131         struct common_obj common[VPIF_NUMBER_OF_OBJECTS];
 132         /* video object */
 133         struct video_obj video;
 134 };
 135
 136 /* File handle structure */
 137 struct vpif_fh {
 138         /* pointer to channel object for opened device */
 139         struct channel_obj *channel;
 140         /* Indicates whether this file handle is doing IO */
 141         u8 io_allowed[VPIF_NUMBER_OF_OBJECTS];
 142         /* Used to keep track priority of this instance */
 143         enum v4l2_priority prio;
 144         /* Used to indicate channel is initialize or not */
 145         u8 initialized;
 146 };
 147
 148 struct vpif_device {
 149         struct v4l2_device v4l2_dev;
 150         struct channel_obj *dev[VPIF_CAPTURE_NUM_CHANNELS];
 151         struct v4l2_subdev **sd;
 152 };
 153
 154 struct vpif_config_params {
 155         u8 min_numbuffers;
 156         u8 numbuffers[VPIF_CAPTURE_NUM_CHANNELS];
 157         s8 device_type;
 158         u32 min_bufsize[VPIF_CAPTURE_NUM_CHANNELS];
 159         u32 channel_bufsize[VPIF_CAPTURE_NUM_CHANNELS];
 160         u8 default_device[VPIF_CAPTURE_NUM_CHANNELS];
 161         u32 video_limit[VPIF_CAPTURE_NUM_CHANNELS];
 162         u8 max_device_type;
 163 };
 164 /* Struct which keeps track of the line numbers for the sliced vbi service */
 165 struct vpif_service_line {
 166         u16 service_id;
 167         u16 service_line[2];
 168 };
 169 #endif                          /* End of __KERNEL__ */
 170 #endif                          /* VPIF_CAPTURE_H */