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 */ |
242 | |