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vpif_capture.h
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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/videobuf2-dma-contig.h>
29 #include <media/davinci/vpif_types.h>
30 
31 #include "vpif.h"
32 
33 /* Macros */
34 #define VPIF_CAPTURE_VERSION "0.0.2"
35 
36 #define VPIF_VALID_FIELD(field) (((V4L2_FIELD_ANY == field) || \
37  (V4L2_FIELD_NONE == field)) || \
38  (((V4L2_FIELD_INTERLACED == field) || \
39  (V4L2_FIELD_SEQ_TB == field)) || \
40  (V4L2_FIELD_SEQ_BT == field)))
41 
42 #define VPIF_CAPTURE_MAX_DEVICES 2
43 #define VPIF_VIDEO_INDEX 0
44 #define VPIF_NUMBER_OF_OBJECTS 1
45 
46 /* Enumerated data type to give id to each device per channel */
47 enum vpif_channel_id {
48  VPIF_CHANNEL0_VIDEO = 0,
49  VPIF_CHANNEL1_VIDEO,
50 };
51 
52 struct video_obj {
53  enum v4l2_field buf_field;
54  /* Currently selected or default standard */
55  v4l2_std_id stdid;
56  struct v4l2_dv_timings dv_timings;
57 };
58 
59 struct vpif_cap_buffer {
60  struct vb2_buffer vb;
61  struct list_head list;
62 };
63 
64 struct common_obj {
65  /* Pointer pointing to current v4l2_buffer */
66  struct vpif_cap_buffer *cur_frm;
67  /* Pointer pointing to current v4l2_buffer */
68  struct vpif_cap_buffer *next_frm;
69  /*
70  * This field keeps track of type of buffer exchange mechanism
71  * user has selected
72  */
73  enum v4l2_memory memory;
74  /* Used to store pixel format */
75  struct v4l2_format fmt;
76  /* Buffer queue used in video-buf */
77  struct vb2_queue buffer_queue;
78  /* allocator-specific contexts for each plane */
79  struct vb2_alloc_ctx *alloc_ctx;
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  /* Current input */
121  u32 input_idx;
122  /* subdev corresponding to the current input, may be NULL */
123  struct v4l2_subdev *sd;
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  u32 video_limit[VPIF_CAPTURE_NUM_CHANNELS];
158  u8 max_device_type;
159 };
160 
161 #endif /* End of __KERNEL__ */
162 #endif /* VPIF_CAPTURE_H */
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