1 /*
2    cx231xx_vbi.h - driver for Conexant Cx23100/101/102 USB video capture devices
3 
4    Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
5 		Based on cx88 driver
6 
7    This program is free software; you can redistribute it and/or modify
8    it under the terms of the GNU General Public License as published by
9    the Free Software Foundation; either version 2 of the License, or
10    (at your option) any later version.
11 
12    This program is distributed in the hope that it will be useful,
13    but WITHOUT ANY WARRANTY; without even the implied warranty of
14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15    GNU General Public License for more details.
16 
17    You should have received a copy of the GNU General Public License
18    along with this program; if not, write to the Free Software
19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20  */
21 
22 #ifndef _CX231XX_VBI_H
23 #define _CX231XX_VBI_H
24 
25 extern struct videobuf_queue_ops cx231xx_vbi_qops;
26 
27 #define   NTSC_VBI_START_LINE 10	/* line 10 - 21 */
28 #define   NTSC_VBI_END_LINE   21
29 #define   NTSC_VBI_LINES	  (NTSC_VBI_END_LINE-NTSC_VBI_START_LINE+1)
30 
31 #define   PAL_VBI_START_LINE  6
32 #define   PAL_VBI_END_LINE    23
33 #define   PAL_VBI_LINES       (PAL_VBI_END_LINE-PAL_VBI_START_LINE+1)
34 
35 #define   VBI_STRIDE            1440
36 #define   VBI_SAMPLES_PER_LINE  1440
37 
38 #define   CX231XX_NUM_VBI_PACKETS       4
39 #define   CX231XX_NUM_VBI_BUFS          5
40 
41 /* stream functions */
42 int cx231xx_init_vbi_isoc(struct cx231xx *dev, int max_packets,
43 			  int num_bufs, int max_pkt_size,
44 			  int (*bulk_copy) (struct cx231xx *dev,
45 					    struct urb *urb));
46 
47 void cx231xx_uninit_vbi_isoc(struct cx231xx *dev);
48 
49 /* vbi data copy functions */
50 u32 cx231xx_get_vbi_line(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q,
51 			 u8 sav_eav, u8 *p_buffer, u32 buffer_size);
52 
53 u32 cx231xx_copy_vbi_line(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q,
54 			  u8 *p_line, u32 length, int field_number);
55 
56 void cx231xx_reset_vbi_buffer(struct cx231xx *dev,
57 			      struct cx231xx_dmaqueue *dma_q);
58 
59 int cx231xx_do_vbi_copy(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q,
60 			u8 *p_buffer, u32 bytes_to_copy);
61 
62 u8 cx231xx_is_vbi_buffer_done(struct cx231xx *dev,
63 			      struct cx231xx_dmaqueue *dma_q);
64 
65 #endif
66