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/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ /* * Copyright (C) 2021 Glider bv * * Based on include/uapi/linux/map_to_7segment.h: * Copyright (c) 2005 Henk Vergonet <Henk.Vergonet@gmail.com> */ #ifndef MAP_TO_14SEGMENT_H #define MAP_TO_14SEGMENT_H /* This file provides translation primitives and tables for the conversion * of (ASCII) characters to a 14-segments notation. * * The 14 segment's wikipedia notation below is used as standard. * See: https://en.wikipedia.org/wiki/Fourteen-segment_display * * Notation: +---a---+ * |\ | /| * f h i j b * | \|/ | * +-g1+-g2+ * | /|\ | * e k l m c * |/ | \| * +---d---+ * * Usage: * * Register a map variable, and fill it with a character set: * static SEG14_DEFAULT_MAP(map_seg14); * * * Then use for conversion: * seg14 = map_to_seg14(&map_seg14, some_char); * ... * * In device drivers it is recommended, if required, to make the char map * accessible via the sysfs interface using the following scheme: * * static ssize_t map_seg14_show(struct device *dev, * struct device_attribute *attr, char *buf) * { * memcpy(buf, &map_seg14, sizeof(map_seg14)); * return sizeof(map_seg14); * } * static ssize_t map_seg14_store(struct device *dev, * struct device_attribute *attr, * const char *buf, size_t cnt) * { * if (cnt != sizeof(map_seg14)) * return -EINVAL; * memcpy(&map_seg14, buf, cnt); * return cnt; * } * static DEVICE_ATTR_RW(map_seg14); */ #include <linux/errno.h> #include <linux/types.h> #include <asm/byteorder.h> #define BIT_SEG14_A 0 #define BIT_SEG14_B 1 #define BIT_SEG14_C 2 #define BIT_SEG14_D 3 #define BIT_SEG14_E 4 #define BIT_SEG14_F 5 #define BIT_SEG14_G1 6 #define BIT_SEG14_G2 7 #define BIT_SEG14_H 8 #define BIT_SEG14_I 9 #define BIT_SEG14_J 10 #define BIT_SEG14_K 11 #define BIT_SEG14_L 12 #define BIT_SEG14_M 13 #define BIT_SEG14_RESERVED1 14 #define BIT_SEG14_RESERVED2 15 struct seg14_conversion_map { __be16 table[128]; }; static __inline__ int map_to_seg14(struct seg14_conversion_map *map, int c) { if (c < 0 || c >= sizeof(map->table) / sizeof(map->table[0])) return -EINVAL; return __be16_to_cpu(map->table[c]); } #define SEG14_CONVERSION_MAP(_name, _map) \ struct seg14_conversion_map _name = { .table = { _map } } /* * It is recommended to use a facility that allows user space to redefine * custom character sets for LCD devices. Please use a sysfs interface * as described above. */ #define MAP_TO_SEG14_SYSFS_FILE "map_seg14" /******************************************************************************* * ASCII conversion table ******************************************************************************/ #define _SEG14(sym, a, b, c, d, e, f, g1, g2, h, j, k, l, m, n) \ __cpu_to_be16( a << BIT_SEG14_A | b << BIT_SEG14_B | \ c << BIT_SEG14_C | d << BIT_SEG14_D | \ e << BIT_SEG14_E | f << BIT_SEG14_F | \ g1 << BIT_SEG14_G1 | g2 << BIT_SEG14_G2 | \ h << BIT_SEG14_H | j << BIT_SEG14_I | \ k << BIT_SEG14_J | l << BIT_SEG14_K | \ m << BIT_SEG14_L | n << BIT_SEG14_M ) #define _MAP_0_32_ASCII_SEG14_NON_PRINTABLE \ 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, #define _MAP_33_47_ASCII_SEG14_SYMBOL \ _SEG14('!', 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0), \ _SEG14('"', 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0), \ _SEG14('#', 0, 1, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0), \ _SEG14('$', 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 0), \ _SEG14('%', 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0), \ _SEG14('&', 1, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1), \ _SEG14('\'',0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0), \ _SEG14('(', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1), \ _SEG14(')', 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0), \ _SEG14('*', 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1), \ _SEG14('+', 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0), \ _SEG14(',', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0), \ _SEG14('-', 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0), \ _SEG14('.', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1), \ _SEG14('/', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0), #define _MAP_48_57_ASCII_SEG14_NUMERIC \ _SEG14('0', 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0), \ _SEG14('1', 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0), \ _SEG14('2', 1, 1, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0), \ _SEG14('3', 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0), \ _SEG14('4', 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0), \ _SEG14('5', 1, 0, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1), \ _SEG14('6', 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0), \ _SEG14('7', 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0), \ _SEG14('8', 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0), \ _SEG14('9', 1, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0), #define _MAP_58_64_ASCII_SEG14_SYMBOL \ _SEG14(':', 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0), \ _SEG14(';', 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0), \ _SEG14('<', 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1), \ _SEG14('=', 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0), \ _SEG14('>', 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0), \ _SEG14('?', 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0), \ _SEG14('@', 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 0), #define _MAP_65_90_ASCII_SEG14_ALPHA_UPPER \ _SEG14('A', 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0), \ _SEG14('B', 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 1, 0), \ _SEG14('C', 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0), \ _SEG14('D', 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0), \ _SEG14('E', 1, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0), \ _SEG14('F', 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0), \ _SEG14('G', 1, 0, 1, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0), \ _SEG14('H', 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0), \ _SEG14('I', 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0), \ _SEG14('J', 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0), \ _SEG14('K', 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1), \ _SEG14('L', 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0), \ _SEG14('M', 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 0, 0), \ _SEG14('N', 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 1), \ _SEG14('O', 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0), \ _SEG14('P', 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0), \ _SEG14('Q', 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1), \ _SEG14('R', 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1), \ _SEG14('S', 1, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0), \ _SEG14('T', 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0), \ _SEG14('U', 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0), \ _SEG14('V', 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0), \ _SEG14('W', 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 1), \ _SEG14('X', 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 1), \ _SEG14('Y', 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0), \ _SEG14('Z', 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0), #define _MAP_91_96_ASCII_SEG14_SYMBOL \ _SEG14('[', 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0), \ _SEG14('\\',0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1), \ _SEG14(']', 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0), \ _SEG14('^', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1), \ _SEG14('_', 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0), \ _SEG14('`', 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0), #define _MAP_97_122_ASCII_SEG14_ALPHA_LOWER \ _SEG14('a', 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0), \ _SEG14('b', 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1), \ _SEG14('c', 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0), \ _SEG14('d', 0, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0), \ _SEG14('e', 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0), \ _SEG14('f', 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0), \ _SEG14('g', 0, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0), \ _SEG14('h', 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 0), \ _SEG14('i', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0), \ _SEG14('j', 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0), \ _SEG14('k', 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1), \ _SEG14('l', 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0), \ _SEG14('m', 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0), \ _SEG14('n', 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0), \ _SEG14('o', 0, 0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0), \ _SEG14('p', 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0), \ _SEG14('q', 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0), \ _SEG14('r', 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0), \ _SEG14('s', 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1), \ _SEG14('t', 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0), \ _SEG14('u', 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0), \ _SEG14('v', 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0), \ _SEG14('w', 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1), \ _SEG14('x', 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1), \ _SEG14('y', 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0), \ _SEG14('z', 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0), #define _MAP_123_126_ASCII_SEG14_SYMBOL \ _SEG14('{', 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0), \ _SEG14('|', 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0), \ _SEG14('}', 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1), \ _SEG14('~', 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0), /* Maps */ #define MAP_ASCII14SEG_ALPHANUM \ _MAP_0_32_ASCII_SEG14_NON_PRINTABLE \ _MAP_33_47_ASCII_SEG14_SYMBOL \ _MAP_48_57_ASCII_SEG14_NUMERIC \ _MAP_58_64_ASCII_SEG14_SYMBOL \ _MAP_65_90_ASCII_SEG14_ALPHA_UPPER \ _MAP_91_96_ASCII_SEG14_SYMBOL \ _MAP_97_122_ASCII_SEG14_ALPHA_LOWER \ _MAP_123_126_ASCII_SEG14_SYMBOL #define SEG14_DEFAULT_MAP(_name) \ SEG14_CONVERSION_MAP(_name, MAP_ASCII14SEG_ALPHANUM) #endif /* MAP_TO_14SEGMENT_H */