diff options
Diffstat (limited to 'drivers/input/misc/map_to_7segment.h')
-rw-r--r-- | drivers/input/misc/map_to_7segment.h | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/drivers/input/misc/map_to_7segment.h b/drivers/input/misc/map_to_7segment.h new file mode 100644 index 000000000000..a424094d9fe2 --- /dev/null +++ b/drivers/input/misc/map_to_7segment.h | |||
@@ -0,0 +1,189 @@ | |||
1 | /* | ||
2 | * drivers/usb/input/map_to_7segment.h | ||
3 | * | ||
4 | * Copyright (c) 2005 Henk Vergonet <Henk.Vergonet@gmail.com> | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or | ||
7 | * modify it under the terms of the GNU General Public License as | ||
8 | * published by the Free Software Foundation; either version 2 of | ||
9 | * the License, or (at your option) any later version. | ||
10 | * | ||
11 | * This program is distributed in the hope that it will be useful, | ||
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
14 | * GNU General Public License for more details. | ||
15 | * | ||
16 | * You should have received a copy of the GNU General Public License | ||
17 | * along with this program; if not, write to the Free Software | ||
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
19 | */ | ||
20 | |||
21 | #ifndef MAP_TO_7SEGMENT_H | ||
22 | #define MAP_TO_7SEGMENT_H | ||
23 | |||
24 | /* This file provides translation primitives and tables for the conversion | ||
25 | * of (ASCII) characters to a 7-segments notation. | ||
26 | * | ||
27 | * The 7 segment's wikipedia notation below is used as standard. | ||
28 | * See: http://en.wikipedia.org/wiki/Seven_segment_display | ||
29 | * | ||
30 | * Notation: +-a-+ | ||
31 | * f b | ||
32 | * +-g-+ | ||
33 | * e c | ||
34 | * +-d-+ | ||
35 | * | ||
36 | * Usage: | ||
37 | * | ||
38 | * Register a map variable, and fill it with a character set: | ||
39 | * static SEG7_DEFAULT_MAP(map_seg7); | ||
40 | * | ||
41 | * | ||
42 | * Then use for conversion: | ||
43 | * seg7 = map_to_seg7(&map_seg7, some_char); | ||
44 | * ... | ||
45 | * | ||
46 | * In device drivers it is recommended, if required, to make the char map | ||
47 | * accessible via the sysfs interface using the following scheme: | ||
48 | * | ||
49 | * static ssize_t show_map(struct device *dev, char *buf) { | ||
50 | * memcpy(buf, &map_seg7, sizeof(map_seg7)); | ||
51 | * return sizeof(map_seg7); | ||
52 | * } | ||
53 | * static ssize_t store_map(struct device *dev, const char *buf, size_t cnt) { | ||
54 | * if(cnt != sizeof(map_seg7)) | ||
55 | * return -EINVAL; | ||
56 | * memcpy(&map_seg7, buf, cnt); | ||
57 | * return cnt; | ||
58 | * } | ||
59 | * static DEVICE_ATTR(map_seg7, PERMS_RW, show_map, store_map); | ||
60 | * | ||
61 | * History: | ||
62 | * 2005-05-31 RFC linux-kernel@vger.kernel.org | ||
63 | */ | ||
64 | #include <linux/errno.h> | ||
65 | |||
66 | |||
67 | #define BIT_SEG7_A 0 | ||
68 | #define BIT_SEG7_B 1 | ||
69 | #define BIT_SEG7_C 2 | ||
70 | #define BIT_SEG7_D 3 | ||
71 | #define BIT_SEG7_E 4 | ||
72 | #define BIT_SEG7_F 5 | ||
73 | #define BIT_SEG7_G 6 | ||
74 | #define BIT_SEG7_RESERVED 7 | ||
75 | |||
76 | struct seg7_conversion_map { | ||
77 | unsigned char table[128]; | ||
78 | }; | ||
79 | |||
80 | static inline int map_to_seg7(struct seg7_conversion_map *map, int c) | ||
81 | { | ||
82 | return c >= 0 && c < sizeof(map->table) ? map->table[c] : -EINVAL; | ||
83 | } | ||
84 | |||
85 | #define SEG7_CONVERSION_MAP(_name, _map) \ | ||
86 | struct seg7_conversion_map _name = { .table = { _map } } | ||
87 | |||
88 | /* | ||
89 | * It is recommended to use a facility that allows user space to redefine | ||
90 | * custom character sets for LCD devices. Please use a sysfs interface | ||
91 | * as described above. | ||
92 | */ | ||
93 | #define MAP_TO_SEG7_SYSFS_FILE "map_seg7" | ||
94 | |||
95 | /******************************************************************************* | ||
96 | * ASCII conversion table | ||
97 | ******************************************************************************/ | ||
98 | |||
99 | #define _SEG7(l,a,b,c,d,e,f,g) \ | ||
100 | ( a<<BIT_SEG7_A | b<<BIT_SEG7_B | c<<BIT_SEG7_C | d<<BIT_SEG7_D | \ | ||
101 | e<<BIT_SEG7_E | f<<BIT_SEG7_F | g<<BIT_SEG7_G ) | ||
102 | |||
103 | #define _MAP_0_32_ASCII_SEG7_NON_PRINTABLE \ | ||
104 | 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, | ||
105 | |||
106 | #define _MAP_33_47_ASCII_SEG7_SYMBOL \ | ||
107 | _SEG7('!',0,0,0,0,1,1,0), _SEG7('"',0,1,0,0,0,1,0), _SEG7('#',0,1,1,0,1,1,0),\ | ||
108 | _SEG7('$',1,0,1,1,0,1,1), _SEG7('%',0,0,1,0,0,1,0), _SEG7('&',1,0,1,1,1,1,1),\ | ||
109 | _SEG7('\'',0,0,0,0,0,1,0),_SEG7('(',1,0,0,1,1,1,0), _SEG7(')',1,1,1,1,0,0,0),\ | ||
110 | _SEG7('*',0,1,1,0,1,1,1), _SEG7('+',0,1,1,0,0,0,1), _SEG7(',',0,0,0,0,1,0,0),\ | ||
111 | _SEG7('-',0,0,0,0,0,0,1), _SEG7('.',0,0,0,0,1,0,0), _SEG7('/',0,1,0,0,1,0,1), | ||
112 | |||
113 | #define _MAP_48_57_ASCII_SEG7_NUMERIC \ | ||
114 | _SEG7('0',1,1,1,1,1,1,0), _SEG7('1',0,1,1,0,0,0,0), _SEG7('2',1,1,0,1,1,0,1),\ | ||
115 | _SEG7('3',1,1,1,1,0,0,1), _SEG7('4',0,1,1,0,0,1,1), _SEG7('5',1,0,1,1,0,1,1),\ | ||
116 | _SEG7('6',1,0,1,1,1,1,1), _SEG7('7',1,1,1,0,0,0,0), _SEG7('8',1,1,1,1,1,1,1),\ | ||
117 | _SEG7('9',1,1,1,1,0,1,1), | ||
118 | |||
119 | #define _MAP_58_64_ASCII_SEG7_SYMBOL \ | ||
120 | _SEG7(':',0,0,0,1,0,0,1), _SEG7(';',0,0,0,1,0,0,1), _SEG7('<',1,0,0,0,0,1,1),\ | ||
121 | _SEG7('=',0,0,0,1,0,0,1), _SEG7('>',1,1,0,0,0,0,1), _SEG7('?',1,1,1,0,0,1,0),\ | ||
122 | _SEG7('@',1,1,0,1,1,1,1), | ||
123 | |||
124 | #define _MAP_65_90_ASCII_SEG7_ALPHA_UPPR \ | ||
125 | _SEG7('A',1,1,1,0,1,1,1), _SEG7('B',1,1,1,1,1,1,1), _SEG7('C',1,0,0,1,1,1,0),\ | ||
126 | _SEG7('D',1,1,1,1,1,1,0), _SEG7('E',1,0,0,1,1,1,1), _SEG7('F',1,0,0,0,1,1,1),\ | ||
127 | _SEG7('G',1,1,1,1,0,1,1), _SEG7('H',0,1,1,0,1,1,1), _SEG7('I',0,1,1,0,0,0,0),\ | ||
128 | _SEG7('J',0,1,1,1,0,0,0), _SEG7('K',0,1,1,0,1,1,1), _SEG7('L',0,0,0,1,1,1,0),\ | ||
129 | _SEG7('M',1,1,1,0,1,1,0), _SEG7('N',1,1,1,0,1,1,0), _SEG7('O',1,1,1,1,1,1,0),\ | ||
130 | _SEG7('P',1,1,0,0,1,1,1), _SEG7('Q',1,1,1,1,1,1,0), _SEG7('R',1,1,1,0,1,1,1),\ | ||
131 | _SEG7('S',1,0,1,1,0,1,1), _SEG7('T',0,0,0,1,1,1,1), _SEG7('U',0,1,1,1,1,1,0),\ | ||
132 | _SEG7('V',0,1,1,1,1,1,0), _SEG7('W',0,1,1,1,1,1,1), _SEG7('X',0,1,1,0,1,1,1),\ | ||
133 | _SEG7('Y',0,1,1,0,0,1,1), _SEG7('Z',1,1,0,1,1,0,1), | ||
134 | |||
135 | #define _MAP_91_96_ASCII_SEG7_SYMBOL \ | ||
136 | _SEG7('[',1,0,0,1,1,1,0), _SEG7('\\',0,0,1,0,0,1,1),_SEG7(']',1,1,1,1,0,0,0),\ | ||
137 | _SEG7('^',1,1,0,0,0,1,0), _SEG7('_',0,0,0,1,0,0,0), _SEG7('`',0,1,0,0,0,0,0), | ||
138 | |||
139 | #define _MAP_97_122_ASCII_SEG7_ALPHA_LOWER \ | ||
140 | _SEG7('A',1,1,1,0,1,1,1), _SEG7('b',0,0,1,1,1,1,1), _SEG7('c',0,0,0,1,1,0,1),\ | ||
141 | _SEG7('d',0,1,1,1,1,0,1), _SEG7('E',1,0,0,1,1,1,1), _SEG7('F',1,0,0,0,1,1,1),\ | ||
142 | _SEG7('G',1,1,1,1,0,1,1), _SEG7('h',0,0,1,0,1,1,1), _SEG7('i',0,0,1,0,0,0,0),\ | ||
143 | _SEG7('j',0,0,1,1,0,0,0), _SEG7('k',0,0,1,0,1,1,1), _SEG7('L',0,0,0,1,1,1,0),\ | ||
144 | _SEG7('M',1,1,1,0,1,1,0), _SEG7('n',0,0,1,0,1,0,1), _SEG7('o',0,0,1,1,1,0,1),\ | ||
145 | _SEG7('P',1,1,0,0,1,1,1), _SEG7('q',1,1,1,0,0,1,1), _SEG7('r',0,0,0,0,1,0,1),\ | ||
146 | _SEG7('S',1,0,1,1,0,1,1), _SEG7('T',0,0,0,1,1,1,1), _SEG7('u',0,0,1,1,1,0,0),\ | ||
147 | _SEG7('v',0,0,1,1,1,0,0), _SEG7('W',0,1,1,1,1,1,1), _SEG7('X',0,1,1,0,1,1,1),\ | ||
148 | _SEG7('y',0,1,1,1,0,1,1), _SEG7('Z',1,1,0,1,1,0,1), | ||
149 | |||
150 | #define _MAP_123_126_ASCII_SEG7_SYMBOL \ | ||
151 | _SEG7('{',1,0,0,1,1,1,0), _SEG7('|',0,0,0,0,1,1,0), _SEG7('}',1,1,1,1,0,0,0),\ | ||
152 | _SEG7('~',1,0,0,0,0,0,0), | ||
153 | |||
154 | /* Maps */ | ||
155 | |||
156 | /* This set tries to map as close as possible to the visible characteristics | ||
157 | * of the ASCII symbol, lowercase and uppercase letters may differ in | ||
158 | * presentation on the display. | ||
159 | */ | ||
160 | #define MAP_ASCII7SEG_ALPHANUM \ | ||
161 | _MAP_0_32_ASCII_SEG7_NON_PRINTABLE \ | ||
162 | _MAP_33_47_ASCII_SEG7_SYMBOL \ | ||
163 | _MAP_48_57_ASCII_SEG7_NUMERIC \ | ||
164 | _MAP_58_64_ASCII_SEG7_SYMBOL \ | ||
165 | _MAP_65_90_ASCII_SEG7_ALPHA_UPPR \ | ||
166 | _MAP_91_96_ASCII_SEG7_SYMBOL \ | ||
167 | _MAP_97_122_ASCII_SEG7_ALPHA_LOWER \ | ||
168 | _MAP_123_126_ASCII_SEG7_SYMBOL | ||
169 | |||
170 | /* This set tries to map as close as possible to the symbolic characteristics | ||
171 | * of the ASCII character for maximum discrimination. | ||
172 | * For now this means all alpha chars are in lower case representations. | ||
173 | * (This for example facilitates the use of hex numbers with uppercase input.) | ||
174 | */ | ||
175 | #define MAP_ASCII7SEG_ALPHANUM_LC \ | ||
176 | _MAP_0_32_ASCII_SEG7_NON_PRINTABLE \ | ||
177 | _MAP_33_47_ASCII_SEG7_SYMBOL \ | ||
178 | _MAP_48_57_ASCII_SEG7_NUMERIC \ | ||
179 | _MAP_58_64_ASCII_SEG7_SYMBOL \ | ||
180 | _MAP_97_122_ASCII_SEG7_ALPHA_LOWER \ | ||
181 | _MAP_91_96_ASCII_SEG7_SYMBOL \ | ||
182 | _MAP_97_122_ASCII_SEG7_ALPHA_LOWER \ | ||
183 | _MAP_123_126_ASCII_SEG7_SYMBOL | ||
184 | |||
185 | #define SEG7_DEFAULT_MAP(_name) \ | ||
186 | SEG7_CONVERSION_MAP(_name,MAP_ASCII7SEG_ALPHANUM) | ||
187 | |||
188 | #endif /* MAP_TO_7SEGMENT_H */ | ||
189 | |||