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