Merge tag 'dma-mapping-5.13' of git://git.infradead.org/users/hch/dma-mapping
[platform/kernel/linux-starfive.git] / include / uapi / linux / map_to_7segment.h
1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2 /*
3  * Copyright (c) 2005 Henk Vergonet <Henk.Vergonet@gmail.com>
4  */
5
6 #ifndef MAP_TO_7SEGMENT_H
7 #define MAP_TO_7SEGMENT_H
8
9 /* This file provides translation primitives and tables for the conversion
10  * of (ASCII) characters to a 7-segments notation.
11  *
12  * The 7 segment's wikipedia notation below is used as standard.
13  * See: https://en.wikipedia.org/wiki/Seven_segment_display
14  *
15  * Notation:    +-a-+
16  *              f   b
17  *              +-g-+
18  *              e   c
19  *              +-d-+
20  *
21  * Usage:
22  *
23  *   Register a map variable, and fill it with a character set:
24  *      static SEG7_DEFAULT_MAP(map_seg7);
25  *
26  *
27  *   Then use for conversion:
28  *      seg7 = map_to_seg7(&map_seg7, some_char);
29  *      ...
30  *
31  * In device drivers it is recommended, if required, to make the char map
32  * accessible via the sysfs interface using the following scheme:
33  *
34  * static ssize_t map_seg7_show(struct device *dev,
35  *                              struct device_attribute *attr, char *buf)
36  * {
37  *      memcpy(buf, &map_seg7, sizeof(map_seg7));
38  *      return sizeof(map_seg7);
39  * }
40  * static ssize_t map_seg7_store(struct device *dev,
41  *                               struct device_attribute *attr, const char *buf,
42  *                               size_t cnt)
43  * {
44  *      if(cnt != sizeof(map_seg7))
45  *              return -EINVAL;
46  *      memcpy(&map_seg7, buf, cnt);
47  *      return cnt;
48  * }
49  * static DEVICE_ATTR_RW(map_seg7);
50  *
51  * History:
52  * 2005-05-31   RFC linux-kernel@vger.kernel.org
53  */
54 #include <linux/errno.h>
55
56
57 #define BIT_SEG7_A              0
58 #define BIT_SEG7_B              1
59 #define BIT_SEG7_C              2
60 #define BIT_SEG7_D              3
61 #define BIT_SEG7_E              4
62 #define BIT_SEG7_F              5
63 #define BIT_SEG7_G              6
64 #define BIT_SEG7_RESERVED       7
65
66 struct seg7_conversion_map {
67         unsigned char   table[128];
68 };
69
70 static __inline__ int map_to_seg7(struct seg7_conversion_map *map, int c)
71 {
72         return c >= 0 && c < sizeof(map->table) ? map->table[c] : -EINVAL;
73 }
74
75 #define SEG7_CONVERSION_MAP(_name, _map)        \
76         struct seg7_conversion_map _name = { .table = { _map } }
77
78 /*
79  * It is recommended to use a facility that allows user space to redefine
80  * custom character sets for LCD devices. Please use a sysfs interface
81  * as described above.
82  */
83 #define MAP_TO_SEG7_SYSFS_FILE  "map_seg7"
84
85 /*******************************************************************************
86  * ASCII conversion table
87  ******************************************************************************/
88
89 #define _SEG7(l,a,b,c,d,e,f,g)  \
90       ( a<<BIT_SEG7_A | b<<BIT_SEG7_B | c<<BIT_SEG7_C | d<<BIT_SEG7_D | \
91         e<<BIT_SEG7_E | f<<BIT_SEG7_F | g<<BIT_SEG7_G )
92
93 #define _MAP_0_32_ASCII_SEG7_NON_PRINTABLE      \
94         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,
95
96 #define _MAP_33_47_ASCII_SEG7_SYMBOL            \
97  _SEG7('!',0,0,0,0,1,1,0), _SEG7('"',0,1,0,0,0,1,0), _SEG7('#',0,1,1,0,1,1,0),\
98  _SEG7('$',1,0,1,1,0,1,1), _SEG7('%',0,0,1,0,0,1,0), _SEG7('&',1,0,1,1,1,1,1),\
99  _SEG7('\'',0,0,0,0,0,1,0),_SEG7('(',1,0,0,1,1,1,0), _SEG7(')',1,1,1,1,0,0,0),\
100  _SEG7('*',0,1,1,0,1,1,1), _SEG7('+',0,1,1,0,0,0,1), _SEG7(',',0,0,0,0,1,0,0),\
101  _SEG7('-',0,0,0,0,0,0,1), _SEG7('.',0,0,0,0,1,0,0), _SEG7('/',0,1,0,0,1,0,1),
102
103 #define _MAP_48_57_ASCII_SEG7_NUMERIC           \
104  _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),\
105  _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),\
106  _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),\
107  _SEG7('9',1,1,1,1,0,1,1),
108
109 #define _MAP_58_64_ASCII_SEG7_SYMBOL            \
110  _SEG7(':',0,0,0,1,0,0,1), _SEG7(';',0,0,0,1,0,0,1), _SEG7('<',1,0,0,0,0,1,1),\
111  _SEG7('=',0,0,0,1,0,0,1), _SEG7('>',1,1,0,0,0,0,1), _SEG7('?',1,1,1,0,0,1,0),\
112  _SEG7('@',1,1,0,1,1,1,1),
113
114 #define _MAP_65_90_ASCII_SEG7_ALPHA_UPPR        \
115  _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),\
116  _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),\
117  _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),\
118  _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),\
119  _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),\
120  _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),\
121  _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),\
122  _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),\
123  _SEG7('Y',0,1,1,0,0,1,1), _SEG7('Z',1,1,0,1,1,0,1),
124
125 #define _MAP_91_96_ASCII_SEG7_SYMBOL            \
126  _SEG7('[',1,0,0,1,1,1,0), _SEG7('\\',0,0,1,0,0,1,1),_SEG7(']',1,1,1,1,0,0,0),\
127  _SEG7('^',1,1,0,0,0,1,0), _SEG7('_',0,0,0,1,0,0,0), _SEG7('`',0,1,0,0,0,0,0),
128
129 #define _MAP_97_122_ASCII_SEG7_ALPHA_LOWER      \
130  _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),\
131  _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),\
132  _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),\
133  _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),\
134  _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),\
135  _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),\
136  _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),\
137  _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),\
138  _SEG7('y',0,1,1,1,0,1,1), _SEG7('Z',1,1,0,1,1,0,1),
139
140 #define _MAP_123_126_ASCII_SEG7_SYMBOL          \
141  _SEG7('{',1,0,0,1,1,1,0), _SEG7('|',0,0,0,0,1,1,0), _SEG7('}',1,1,1,1,0,0,0),\
142  _SEG7('~',1,0,0,0,0,0,0),
143
144 /* Maps */
145
146 /* This set tries to map as close as possible to the visible characteristics
147  * of the ASCII symbol, lowercase and uppercase letters may differ in
148  * presentation on the display.
149  */
150 #define MAP_ASCII7SEG_ALPHANUM                  \
151         _MAP_0_32_ASCII_SEG7_NON_PRINTABLE      \
152         _MAP_33_47_ASCII_SEG7_SYMBOL            \
153         _MAP_48_57_ASCII_SEG7_NUMERIC           \
154         _MAP_58_64_ASCII_SEG7_SYMBOL            \
155         _MAP_65_90_ASCII_SEG7_ALPHA_UPPR        \
156         _MAP_91_96_ASCII_SEG7_SYMBOL            \
157         _MAP_97_122_ASCII_SEG7_ALPHA_LOWER      \
158         _MAP_123_126_ASCII_SEG7_SYMBOL
159
160 /* This set tries to map as close as possible to the symbolic characteristics
161  * of the ASCII character for maximum discrimination.
162  * For now this means all alpha chars are in lower case representations.
163  * (This for example facilitates the use of hex numbers with uppercase input.)
164  */
165 #define MAP_ASCII7SEG_ALPHANUM_LC                       \
166         _MAP_0_32_ASCII_SEG7_NON_PRINTABLE      \
167         _MAP_33_47_ASCII_SEG7_SYMBOL            \
168         _MAP_48_57_ASCII_SEG7_NUMERIC           \
169         _MAP_58_64_ASCII_SEG7_SYMBOL            \
170         _MAP_97_122_ASCII_SEG7_ALPHA_LOWER      \
171         _MAP_91_96_ASCII_SEG7_SYMBOL            \
172         _MAP_97_122_ASCII_SEG7_ALPHA_LOWER      \
173         _MAP_123_126_ASCII_SEG7_SYMBOL
174
175 #define SEG7_DEFAULT_MAP(_name)         \
176         SEG7_CONVERSION_MAP(_name,MAP_ASCII7SEG_ALPHANUM)
177
178 #endif  /* MAP_TO_7SEGMENT_H */
179