1 // SPDX-License-Identifier: GPL-2.0-only
3  * vivid-rds-gen.c - rds (radio data system) generator support functions.
13 #include "vivid-rds-gen.h"
19 		return (rds->dyn_pty << 2) | (grp & 3);  in vivid_get_di()
21 		return (rds->compressed << 2) | (grp & 3);  in vivid_get_di()
23 		return (rds->art_head << 2) | (grp & 3);  in vivid_get_di()
25 		return (rds->mono_stereo << 2) | (grp & 3);  in vivid_get_di()
32  * Groups 0-3, 22-25 and 44-47 (spaced 22 groups apart) are filled with a
35  * Groups 4-19 and 26-41 use group 2A for the radio text.
44 	struct v4l2_rds_data *data = rds->data;  in vivid_rds_generate()
53 		data[0].lsb = rds->picode & 0xff;  in vivid_rds_generate()
54 		data[0].msb = rds->picode >> 8;  in vivid_rds_generate()
56 		data[1].lsb = rds->pty << 5;  in vivid_rds_generate()
57 		data[1].msb = (rds->pty >> 3) | (rds->tp << 2);  in vivid_rds_generate()
66 			data[1].lsb |= (rds->ta << 4) | (rds->ms << 3);  in vivid_rds_generate()
68 			data[1].msb |= 1 << 3;  in vivid_rds_generate()
69 			data[2].lsb = rds->picode & 0xff;  in vivid_rds_generate()
70 			data[2].msb = rds->picode >> 8;  in vivid_rds_generate()
72 			data[3].lsb = rds->psname[2 * idx + 1];  in vivid_rds_generate()
73 			data[3].msb = rds->psname[2 * idx];  in vivid_rds_generate()
77 			idx = ((grp - 4) % 22) % 16;  in vivid_rds_generate()
79 			data[1].msb |= 4 << 3;  in vivid_rds_generate()
80 			data[2].msb = rds->radiotext[4 * idx];  in vivid_rds_generate()
81 			data[2].lsb = rds->radiotext[4 * idx + 1];  in vivid_rds_generate()
83 			data[3].msb = rds->radiotext[4 * idx + 2];  in vivid_rds_generate()
84 			data[3].lsb = rds->radiotext[4 * idx + 3];  in vivid_rds_generate()
96 			date = 14956 + tm.tm_mday + ((tm.tm_year - l) * 1461) / 4 +  in vivid_rds_generate()
104 			data[1].msb |= 8 << 3;  in vivid_rds_generate()
107 			data[2].msb = (date >> 7) & 0xff;  in vivid_rds_generate()
110 			data[3].msb = (time >> 8) & 0xff;  in vivid_rds_generate()
113 			data[1].lsb |= (rds->ta << 4) | (rds->ms << 3);  in vivid_rds_generate()
115 			data[1].msb |= 0x1f << 3;  in vivid_rds_generate()
116 			data[2].lsb = rds->picode & 0xff;  in vivid_rds_generate()
117 			data[2].msb = rds->picode >> 8;  in vivid_rds_generate()
119 			data[3].lsb = rds->pty << 5;  in vivid_rds_generate()
120 			data[3].lsb |= (rds->ta << 4) | (rds->ms << 3);  in vivid_rds_generate()
122 			data[3].msb |= rds->pty >> 3;  in vivid_rds_generate()
123 			data[3].msb |= 0x1f << 3;  in vivid_rds_generate()
133 	if (rds->use_rbds) {  in vivid_rds_gen_fill()
134 		rds->picode = 0x2e75; /* 'KLNX' call sign */  in vivid_rds_gen_fill()
135 		rds->pty = alt ? 29 : 2;  in vivid_rds_gen_fill()
137 		rds->picode = 0x8088;  in vivid_rds_gen_fill()
138 		rds->pty = alt ? 16 : 3;  in vivid_rds_gen_fill()
140 	rds->mono_stereo = true;  in vivid_rds_gen_fill()
141 	rds->art_head = false;  in vivid_rds_gen_fill()
142 	rds->compressed = false;  in vivid_rds_gen_fill()
143 	rds->dyn_pty = false;  in vivid_rds_gen_fill()
144 	rds->tp = true;  in vivid_rds_gen_fill()
145 	rds->ta = alt;  in vivid_rds_gen_fill()
146 	rds->ms = true;  in vivid_rds_gen_fill()
147 	snprintf(rds->psname, sizeof(rds->psname), "%6d.%1d",  in vivid_rds_gen_fill()
150 		strscpy(rds->radiotext,  in vivid_rds_gen_fill()
152 			sizeof(rds->radiotext));  in vivid_rds_gen_fill()
154 		strscpy(rds->radiotext,  in vivid_rds_gen_fill()
156 			sizeof(rds->radiotext));  in vivid_rds_gen_fill()