map_to_14segment.h (9504B) - Raw
1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2 /* 3 * Copyright (C) 2021 Glider bv 4 * 5 * Based on include/uapi/linux/map_to_7segment.h: 6 7 * Copyright (c) 2005 Henk Vergonet <Henk.Vergonet@gmail.com> 8 */ 9 10 #ifndef MAP_TO_14SEGMENT_H 11 #define MAP_TO_14SEGMENT_H 12 13 /* This file provides translation primitives and tables for the conversion 14 * of (ASCII) characters to a 14-segments notation. 15 * 16 * The 14 segment's wikipedia notation below is used as standard. 17 * See: https://en.wikipedia.org/wiki/Fourteen-segment_display 18 * 19 * Notation: +---a---+ 20 * |\ | /| 21 * f h i j b 22 * | \|/ | 23 * +-g1+-g2+ 24 * | /|\ | 25 * e k l m c 26 * |/ | \| 27 * +---d---+ 28 * 29 * Usage: 30 * 31 * Register a map variable, and fill it with a character set: 32 * static SEG14_DEFAULT_MAP(map_seg14); 33 * 34 * 35 * Then use for conversion: 36 * seg14 = map_to_seg14(&map_seg14, some_char); 37 * ... 38 * 39 * In device drivers it is recommended, if required, to make the char map 40 * accessible via the sysfs interface using the following scheme: 41 * 42 * static ssize_t map_seg14_show(struct device *dev, 43 * struct device_attribute *attr, char *buf) 44 * { 45 * memcpy(buf, &map_seg14, sizeof(map_seg14)); 46 * return sizeof(map_seg14); 47 * } 48 * static ssize_t map_seg14_store(struct device *dev, 49 * struct device_attribute *attr, 50 * const char *buf, size_t cnt) 51 * { 52 * if (cnt != sizeof(map_seg14)) 53 * return -EINVAL; 54 * memcpy(&map_seg14, buf, cnt); 55 * return cnt; 56 * } 57 * static DEVICE_ATTR_RW(map_seg14); 58 */ 59 #include <linux/errno.h> 60 #include <linux/types.h> 61 62 #include <asm/byteorder.h> 63 64 #define BIT_SEG14_A 0 65 #define BIT_SEG14_B 1 66 #define BIT_SEG14_C 2 67 #define BIT_SEG14_D 3 68 #define BIT_SEG14_E 4 69 #define BIT_SEG14_F 5 70 #define BIT_SEG14_G1 6 71 #define BIT_SEG14_G2 7 72 #define BIT_SEG14_H 8 73 #define BIT_SEG14_I 9 74 #define BIT_SEG14_J 10 75 #define BIT_SEG14_K 11 76 #define BIT_SEG14_L 12 77 #define BIT_SEG14_M 13 78 #define BIT_SEG14_RESERVED1 14 79 #define BIT_SEG14_RESERVED2 15 80 81 struct seg14_conversion_map { 82 __be16 table[128]; 83 }; 84 85 static __inline__ int map_to_seg14(struct seg14_conversion_map *map, int c) 86 { 87 if (c < 0 || c >= sizeof(map->table) / sizeof(map->table[0])) 88 return -EINVAL; 89 90 return __be16_to_cpu(map->table[c]); 91 } 92 93 #define SEG14_CONVERSION_MAP(_name, _map) \ 94 struct seg14_conversion_map _name = { .table = { _map } } 95 96 /* 97 * It is recommended to use a facility that allows user space to redefine 98 * custom character sets for LCD devices. Please use a sysfs interface 99 * as described above. 100 */ 101 #define MAP_TO_SEG14_SYSFS_FILE "map_seg14" 102 103 /******************************************************************************* 104 * ASCII conversion table 105 ******************************************************************************/ 106 107 #define _SEG14(sym, a, b, c, d, e, f, g1, g2, h, j, k, l, m, n) \ 108 __cpu_to_be16( a << BIT_SEG14_A | b << BIT_SEG14_B | \ 109 c << BIT_SEG14_C | d << BIT_SEG14_D | \ 110 e << BIT_SEG14_E | f << BIT_SEG14_F | \ 111 g1 << BIT_SEG14_G1 | g2 << BIT_SEG14_G2 | \ 112 h << BIT_SEG14_H | j << BIT_SEG14_I | \ 113 k << BIT_SEG14_J | l << BIT_SEG14_K | \ 114 m << BIT_SEG14_L | n << BIT_SEG14_M ) 115 116 #define _MAP_0_32_ASCII_SEG14_NON_PRINTABLE \ 117 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 118 119 #define _MAP_33_47_ASCII_SEG14_SYMBOL \ 120 _SEG14('!', 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0), \ 121 _SEG14('"', 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0), \ 122 _SEG14('#', 0, 1, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0), \ 123 _SEG14('$', 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 0), \ 124 _SEG14('%', 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0), \ 125 _SEG14('&', 1, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1), \ 126 _SEG14('\'',0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0), \ 127 _SEG14('(', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1), \ 128 _SEG14(')', 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0), \ 129 _SEG14('*', 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1), \ 130 _SEG14('+', 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0), \ 131 _SEG14(',', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0), \ 132 _SEG14('-', 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0), \ 133 _SEG14('.', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1), \ 134 _SEG14('/', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0), 135 136 #define _MAP_48_57_ASCII_SEG14_NUMERIC \ 137 _SEG14('0', 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0), \ 138 _SEG14('1', 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0), \ 139 _SEG14('2', 1, 1, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0), \ 140 _SEG14('3', 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0), \ 141 _SEG14('4', 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0), \ 142 _SEG14('5', 1, 0, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1), \ 143 _SEG14('6', 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0), \ 144 _SEG14('7', 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0), \ 145 _SEG14('8', 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0), \ 146 _SEG14('9', 1, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0), 147 148 #define _MAP_58_64_ASCII_SEG14_SYMBOL \ 149 _SEG14(':', 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0), \ 150 _SEG14(';', 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0), \ 151 _SEG14('<', 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1), \ 152 _SEG14('=', 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0), \ 153 _SEG14('>', 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0), \ 154 _SEG14('?', 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0), \ 155 _SEG14('@', 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 0), 156 157 #define _MAP_65_90_ASCII_SEG14_ALPHA_UPPER \ 158 _SEG14('A', 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0), \ 159 _SEG14('B', 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 1, 0), \ 160 _SEG14('C', 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0), \ 161 _SEG14('D', 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0), \ 162 _SEG14('E', 1, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0), \ 163 _SEG14('F', 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0), \ 164 _SEG14('G', 1, 0, 1, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0), \ 165 _SEG14('H', 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0), \ 166 _SEG14('I', 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0), \ 167 _SEG14('J', 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0), \ 168 _SEG14('K', 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1), \ 169 _SEG14('L', 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0), \ 170 _SEG14('M', 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 0, 0), \ 171 _SEG14('N', 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 1), \ 172 _SEG14('O', 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0), \ 173 _SEG14('P', 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0), \ 174 _SEG14('Q', 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1), \ 175 _SEG14('R', 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1), \ 176 _SEG14('S', 1, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0), \ 177 _SEG14('T', 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0), \ 178 _SEG14('U', 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0), \ 179 _SEG14('V', 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0), \ 180 _SEG14('W', 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 1), \ 181 _SEG14('X', 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 1), \ 182 _SEG14('Y', 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0), \ 183 _SEG14('Z', 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0), 184 185 #define _MAP_91_96_ASCII_SEG14_SYMBOL \ 186 _SEG14('[', 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0), \ 187 _SEG14('\\',0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1), \ 188 _SEG14(']', 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0), \ 189 _SEG14('^', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1), \ 190 _SEG14('_', 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0), \ 191 _SEG14('`', 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0), 192 193 #define _MAP_97_122_ASCII_SEG14_ALPHA_LOWER \ 194 _SEG14('a', 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0), \ 195 _SEG14('b', 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1), \ 196 _SEG14('c', 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0), \ 197 _SEG14('d', 0, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0), \ 198 _SEG14('e', 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0), \ 199 _SEG14('f', 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0), \ 200 _SEG14('g', 0, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0), \ 201 _SEG14('h', 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 0), \ 202 _SEG14('i', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0), \ 203 _SEG14('j', 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0), \ 204 _SEG14('k', 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1), \ 205 _SEG14('l', 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0), \ 206 _SEG14('m', 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0), \ 207 _SEG14('n', 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0), \ 208 _SEG14('o', 0, 0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0), \ 209 _SEG14('p', 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0), \ 210 _SEG14('q', 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0), \ 211 _SEG14('r', 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0), \ 212 _SEG14('s', 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1), \ 213 _SEG14('t', 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0), \ 214 _SEG14('u', 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0), \ 215 _SEG14('v', 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0), \ 216 _SEG14('w', 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1), \ 217 _SEG14('x', 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1), \ 218 _SEG14('y', 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0), \ 219 _SEG14('z', 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0), 220 221 #define _MAP_123_126_ASCII_SEG14_SYMBOL \ 222 _SEG14('{', 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0), \ 223 _SEG14('|', 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0), \ 224 _SEG14('}', 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1), \ 225 _SEG14('~', 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0), 226 227 /* Maps */ 228 #define MAP_ASCII14SEG_ALPHANUM \ 229 _MAP_0_32_ASCII_SEG14_NON_PRINTABLE \ 230 _MAP_33_47_ASCII_SEG14_SYMBOL \ 231 _MAP_48_57_ASCII_SEG14_NUMERIC \ 232 _MAP_58_64_ASCII_SEG14_SYMBOL \ 233 _MAP_65_90_ASCII_SEG14_ALPHA_UPPER \ 234 _MAP_91_96_ASCII_SEG14_SYMBOL \ 235 _MAP_97_122_ASCII_SEG14_ALPHA_LOWER \ 236 _MAP_123_126_ASCII_SEG14_SYMBOL 237 238 #define SEG14_DEFAULT_MAP(_name) \ 239 SEG14_CONVERSION_MAP(_name, MAP_ASCII14SEG_ALPHANUM) 240 241 #endif /* MAP_TO_14SEGMENT_H */