release/src-rt-6.x.4708/linux/linux-2.6.36/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 <linux/version.h>
  27 #include <media/v4l2-common.h>
  28 #include <media/v4l2-device.h>
  29 #include <media/videobuf-core.h>
  30 #include <media/videobuf-dma-contig.h>
  31 #include <mach/dm646x.h>
  32
  33 #include "vpif.h"
  34
  35 /* Macros */
  36 #define VPIF_MAJOR_RELEASE              0
  37 #define VPIF_MINOR_RELEASE              0
  38 #define VPIF_BUILD                      1
  39 #define VPIF_CAPTURE_VERSION_CODE       ((VPIF_MAJOR_RELEASE << 16) | \
  40         (VPIF_MINOR_RELEASE << 8) | VPIF_BUILD)
  41
  42 #define VPIF_VALID_FIELD(field)         (((V4L2_FIELD_ANY == field) || \
  43         (V4L2_FIELD_NONE == field)) || \
  44         (((V4L2_FIELD_INTERLACED == field) || \
  45         (V4L2_FIELD_SEQ_TB == field)) || \
  46         (V4L2_FIELD_SEQ_BT == field)))
  47
  48 #define VPIF_CAPTURE_MAX_DEVICES        2
  49 #define VPIF_VIDEO_INDEX                0
  50 #define VPIF_NUMBER_OF_OBJECTS          1
  51
  52 /* Enumerated data type to give id to each device per channel */
  53 enum vpif_channel_id {
  54         VPIF_CHANNEL0_VIDEO = 0,
  55         VPIF_CHANNEL1_VIDEO,
  56 };
  57
  58 struct video_obj {
  59         enum v4l2_field buf_field;
  60         /* Currently selected or default standard */
  61         v4l2_std_id stdid;
  62         /* This is to track the last input that is passed to application */
  63         u32 input_idx;
  64 };
  65
  66 struct common_obj {
  67         /* Pointer pointing to current v4l2_buffer */
  68         struct videobuf_buffer *cur_frm;
  69         /* Pointer pointing to current v4l2_buffer */
  70         struct videobuf_buffer *next_frm;
  71         /*
  72          * This field keeps track of type of buffer exchange mechanism
  73          * user has selected
  74          */
  75         enum v4l2_memory memory;
  76         /* Used to store pixel format */
  77         struct v4l2_format fmt;
  78         /* Buffer queue used in video-buf */
  79         struct videobuf_queue buffer_queue;
  80         /* Queue of filled frames */
  81         struct list_head dma_queue;
  82         /* Used in video-buf */
  83         spinlock_t irqlock;
  84         /* lock used to access this structure */
  85         struct mutex lock;
  86         /* number of users performing IO */
  87         u32 io_usrs;
  88         /* Indicates whether streaming started */
  89         u8 started;
  90         /* Function pointer to set the addresses */
  91         void (*set_addr) (unsigned long, unsigned long, unsigned long,
  92                           unsigned long);
  93         /* offset where Y top starts from the starting of the buffer */
  94         u32 ytop_off;
  95         /* offset where Y bottom starts from the starting of the buffer */
  96         u32 ybtm_off;
  97         /* offset where C top starts from the starting of the buffer */
  98         u32 ctop_off;
  99         /* offset where C bottom starts from the starting of the buffer */
 100         u32 cbtm_off;
 101         /* Indicates width of the image data */
 102         u32 width;
 103         /* Indicates height of the image data */
 104         u32 height;
 105 };
 106
 107 struct channel_obj {
 108         /* Identifies video device for this channel */
 109         struct video_device *video_dev;
 110         /* Used to keep track of state of the priority */
 111         struct v4l2_prio_state prio;
 112         /* number of open instances of the channel */
 113         int usrs;
 114         /* Indicates id of the field which is being displayed */
 115         u32 field_id;
 116         /* flag to indicate whether decoder is initialized */
 117         u8 initialized;
 118         /* Identifies channel */
 119         enum vpif_channel_id channel_id;
 120         /* index into sd table */
 121         int curr_sd_index;
 122         /* ptr to current sub device information */
 123         struct vpif_subdev_info *curr_subdev_info;
 124         /* vpif configuration params */
 125         struct vpif_params vpifparams;
 126         /* common object array */
 127         struct common_obj common[VPIF_NUMBER_OF_OBJECTS];
 128         /* video object */
 129         struct video_obj video;
 130 };
 131
 132 /* File handle structure */
 133 struct vpif_fh {
 134         /* pointer to channel object for opened device */
 135         struct channel_obj *channel;
 136         /* Indicates whether this file handle is doing IO */
 137         u8 io_allowed[VPIF_NUMBER_OF_OBJECTS];
 138         /* Used to keep track priority of this instance */
 139         enum v4l2_priority prio;
 140         /* Used to indicate channel is initialize or not */
 141         u8 initialized;
 142 };
 143
 144 struct vpif_device {
 145         struct v4l2_device v4l2_dev;
 146         struct channel_obj *dev[VPIF_CAPTURE_NUM_CHANNELS];
 147         struct v4l2_subdev **sd;
 148 };
 149
 150 struct vpif_config_params {
 151         u8 min_numbuffers;
 152         u8 numbuffers[VPIF_CAPTURE_NUM_CHANNELS];
 153         s8 device_type;
 154         u32 min_bufsize[VPIF_CAPTURE_NUM_CHANNELS];
 155         u32 channel_bufsize[VPIF_CAPTURE_NUM_CHANNELS];
 156         u8 default_device[VPIF_CAPTURE_NUM_CHANNELS];
 157         u8 max_device_type;
 158 };
 159 /* Struct which keeps track of the line numbers for the sliced vbi service */
 160 struct vpif_service_line {
 161         u16 service_id;
 162         u16 service_line[2];
 163 };
 164 #endif                          /* End of __KERNEL__ */
 165 #endif                          /* VPIF_CAPTURE_H */