1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * vivid-rds-gen.h - rds (radio data system) generator support functions.
4  *
5  * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
6  */
7 
8 #ifndef _VIVID_RDS_GEN_H_
9 #define _VIVID_RDS_GEN_H_
10 
11 /*
12  * It takes almost exactly 5 seconds to transmit 57 RDS groups.
13  * Each group has 4 blocks and each block has a payload of 16 bits + a
14  * block identification. The driver will generate the contents of these
15  * 57 groups only when necessary and it will just be played continuously.
16  */
17 #define VIVID_RDS_GEN_GROUPS 57
18 #define VIVID_RDS_GEN_BLKS_PER_GRP 4
19 #define VIVID_RDS_GEN_BLOCKS (VIVID_RDS_GEN_BLKS_PER_GRP * VIVID_RDS_GEN_GROUPS)
20 #define VIVID_RDS_NSEC_PER_BLK (u32)(5ull * NSEC_PER_SEC / VIVID_RDS_GEN_BLOCKS)
21 
22 struct vivid_rds_gen {
23 	struct v4l2_rds_data	data[VIVID_RDS_GEN_BLOCKS];
24 	bool			use_rbds;
25 	u16			picode;
26 	u8			pty;
27 	bool			mono_stereo;
28 	bool			art_head;
29 	bool			compressed;
30 	bool			dyn_pty;
31 	bool			ta;
32 	bool			tp;
33 	bool			ms;
34 	char			psname[8 + 1];
35 	char			radiotext[64 + 1];
36 };
37 
38 void vivid_rds_gen_fill(struct vivid_rds_gen *rds, unsigned freq,
39 		    bool use_alternate);
40 void vivid_rds_generate(struct vivid_rds_gen *rds);
41 
42 #endif
43