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/videobuf-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 common_obj {
64 	/* Pointer pointing to current v4l2_buffer */
65 	struct videobuf_buffer *cur_frm;
66 	/* Pointer pointing to current v4l2_buffer */
67 	struct videobuf_buffer *next_frm;
68 	/*
69 	 * This field keeps track of type of buffer exchange mechanism
70 	 * user has selected
71 	 */
72 	enum v4l2_memory memory;
73 	/* Used to store pixel format */
74 	struct v4l2_format fmt;
75 	/* Buffer queue used in video-buf */
76 	struct videobuf_queue buffer_queue;
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 	/* index into sd table */
118 	int curr_sd_index;
119 	/* ptr to current sub device information */
120 	struct vpif_subdev_info *curr_subdev_info;
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 };
146 
147 struct vpif_config_params {
148 	u8 min_numbuffers;
149 	u8 numbuffers[VPIF_CAPTURE_NUM_CHANNELS];
150 	s8 device_type;
151 	u32 min_bufsize[VPIF_CAPTURE_NUM_CHANNELS];
152 	u32 channel_bufsize[VPIF_CAPTURE_NUM_CHANNELS];
153 	u8 default_device[VPIF_CAPTURE_NUM_CHANNELS];
154 	u8 max_device_type;
155 };
156 /* Struct which keeps track of the line numbers for the sliced vbi service */
157 struct vpif_service_line {
158 	u16 service_id;
159 	u16 service_line[2];
160 };
161 #endif				/* End of __KERNEL__ */
162 #endif				/* VPIF_CAPTURE_H */
163