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
22struct 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
38void vivid_rds_gen_fill(struct vivid_rds_gen *rds, unsigned freq,
39		    bool use_alternate);
40void vivid_rds_generate(struct vivid_rds_gen *rds);
41
42#endif
43