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