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authorKacper <kacper@mail.openlinux.dev>2025-12-07 20:10:31 +0100
committerKacper <kacper@mail.openlinux.dev>2025-12-07 20:10:31 +0100
commitfc00c656c96528112d05cf0edf8631bd5eaea446 (patch)
treea6e0e6c588191a8bd1c64afc3b7a258e3e66c236 /include/arch/x86_64/linux/map_to_7segment.h
Add build system scaffolding and libc headers
Diffstat (limited to 'include/arch/x86_64/linux/map_to_7segment.h')
-rw-r--r--include/arch/x86_64/linux/map_to_7segment.h232
1 files changed, 232 insertions, 0 deletions
diff --git a/include/arch/x86_64/linux/map_to_7segment.h b/include/arch/x86_64/linux/map_to_7segment.h
new file mode 100644
index 00000000..26fd2aa8
--- /dev/null
+++ b/include/arch/x86_64/linux/map_to_7segment.h
@@ -0,0 +1,232 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
+/*
+ * Copyright (c) 2005 Henk Vergonet <Henk.Vergonet@gmail.com>
+ */
+
+#ifndef MAP_TO_7SEGMENT_H
+#define MAP_TO_7SEGMENT_H
+
+/* This file provides translation primitives and tables for the conversion
+ * of (ASCII) characters to a 7-segments notation.
+ *
+ * The 7 segment's wikipedia notation below is used as standard.
+ * See: https://en.wikipedia.org/wiki/Seven_segment_display
+ *
+ * Notation: +-a-+
+ * f b
+ * +-g-+
+ * e c
+ * +-d-+
+ *
+ * Usage:
+ *
+ * Register a map variable, and fill it with a character set:
+ * static SEG7_DEFAULT_MAP(map_seg7);
+ *
+ *
+ * Then use for conversion:
+ * seg7 = map_to_seg7(&map_seg7, 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_seg7_show(struct device *dev,
+ * struct device_attribute *attr, char *buf)
+ * {
+ * memcpy(buf, &map_seg7, sizeof(map_seg7));
+ * return sizeof(map_seg7);
+ * }
+ * static ssize_t map_seg7_store(struct device *dev,
+ * struct device_attribute *attr, const char *buf,
+ * size_t cnt)
+ * {
+ * if(cnt != sizeof(map_seg7))
+ * return -EINVAL;
+ * memcpy(&map_seg7, buf, cnt);
+ * return cnt;
+ * }
+ * static DEVICE_ATTR_RW(map_seg7);
+ *
+ * History:
+ * 2005-05-31 RFC linux-kernel@vger.kernel.org
+ */
+#include <linux/errno.h>
+
+#define BIT_SEG7_A 0
+#define BIT_SEG7_B 1
+#define BIT_SEG7_C 2
+#define BIT_SEG7_D 3
+#define BIT_SEG7_E 4
+#define BIT_SEG7_F 5
+#define BIT_SEG7_G 6
+#define BIT_SEG7_RESERVED 7
+
+struct seg7_conversion_map {
+ unsigned char table[128];
+};
+
+static __inline__ int map_to_seg7(struct seg7_conversion_map *map, int c)
+{
+ return c >= 0 && c < sizeof(map->table) ? map->table[c] : -EINVAL;
+}
+
+#define SEG7_CONVERSION_MAP(_name, _map) \
+ struct seg7_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_SEG7_SYSFS_FILE "map_seg7"
+
+/*******************************************************************************
+ * ASCII conversion table
+ ******************************************************************************/
+
+#define _SEG7(l, a, b, c, d, e, f, g) \
+ (a << BIT_SEG7_A | b << BIT_SEG7_B | c << BIT_SEG7_C | \
+ d << BIT_SEG7_D | e << BIT_SEG7_E | f << BIT_SEG7_F | \
+ g << BIT_SEG7_G)
+
+#define _MAP_0_32_ASCII_SEG7_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_SEG7_SYMBOL \
+ _SEG7('!', 0, 0, 0, 0, 1, 1, 0), _SEG7('"', 0, 1, 0, 0, 0, 1, 0), \
+ _SEG7('#', 0, 1, 1, 0, 1, 1, 0), \
+ _SEG7('$', 1, 0, 1, 1, 0, 1, 1), \
+ _SEG7('%', 0, 0, 1, 0, 0, 1, 0), \
+ _SEG7('&', 1, 0, 1, 1, 1, 1, 1), \
+ _SEG7('\'', 0, 0, 0, 0, 0, 1, 0), \
+ _SEG7('(', 1, 0, 0, 1, 1, 1, 0), \
+ _SEG7(')', 1, 1, 1, 1, 0, 0, 0), \
+ _SEG7('*', 0, 1, 1, 0, 1, 1, 1), \
+ _SEG7('+', 0, 1, 1, 0, 0, 0, 1), \
+ _SEG7(',', 0, 0, 0, 0, 1, 0, 0), \
+ _SEG7('-', 0, 0, 0, 0, 0, 0, 1), \
+ _SEG7('.', 0, 0, 0, 0, 1, 0, 0), \
+ _SEG7('/', 0, 1, 0, 0, 1, 0, 1),
+
+#define _MAP_48_57_ASCII_SEG7_NUMERIC \
+ _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), \
+ _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), \
+ _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), \
+ _SEG7('9', 1, 1, 1, 1, 0, 1, 1),
+
+#define _MAP_58_64_ASCII_SEG7_SYMBOL \
+ _SEG7(':', 0, 0, 0, 1, 0, 0, 1), _SEG7(';', 0, 0, 0, 1, 0, 0, 1), \
+ _SEG7('<', 1, 0, 0, 0, 0, 1, 1), \
+ _SEG7('=', 0, 0, 0, 1, 0, 0, 1), \
+ _SEG7('>', 1, 1, 0, 0, 0, 0, 1), \
+ _SEG7('?', 1, 1, 1, 0, 0, 1, 0), \
+ _SEG7('@', 1, 1, 0, 1, 1, 1, 1),
+
+#define _MAP_65_90_ASCII_SEG7_ALPHA_UPPR \
+ _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), \
+ _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), \
+ _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), \
+ _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), \
+ _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), \
+ _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), \
+ _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), \
+ _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), \
+ _SEG7('Y', 0, 1, 1, 0, 0, 1, 1), \
+ _SEG7('Z', 1, 1, 0, 1, 1, 0, 1),
+
+#define _MAP_91_96_ASCII_SEG7_SYMBOL \
+ _SEG7('[', 1, 0, 0, 1, 1, 1, 0), _SEG7('\\', 0, 0, 1, 0, 0, 1, 1), \
+ _SEG7(']', 1, 1, 1, 1, 0, 0, 0), \
+ _SEG7('^', 1, 1, 0, 0, 0, 1, 0), \
+ _SEG7('_', 0, 0, 0, 1, 0, 0, 0), \
+ _SEG7('`', 0, 1, 0, 0, 0, 0, 0),
+
+#define _MAP_97_122_ASCII_SEG7_ALPHA_LOWER \
+ _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), \
+ _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), \
+ _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), \
+ _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), \
+ _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), \
+ _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), \
+ _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), \
+ _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), \
+ _SEG7('y', 0, 1, 1, 1, 0, 1, 1), \
+ _SEG7('Z', 1, 1, 0, 1, 1, 0, 1),
+
+#define _MAP_123_126_ASCII_SEG7_SYMBOL \
+ _SEG7('{', 1, 0, 0, 1, 1, 1, 0), _SEG7('|', 0, 0, 0, 0, 1, 1, 0), \
+ _SEG7('}', 1, 1, 1, 1, 0, 0, 0), \
+ _SEG7('~', 1, 0, 0, 0, 0, 0, 0),
+
+/* Maps */
+
+/* This set tries to map as close as possible to the visible characteristics
+ * of the ASCII symbol, lowercase and uppercase letters may differ in
+ * presentation on the display.
+ */
+#define MAP_ASCII7SEG_ALPHANUM \
+ _MAP_0_32_ASCII_SEG7_NON_PRINTABLE \
+ _MAP_33_47_ASCII_SEG7_SYMBOL \
+ _MAP_48_57_ASCII_SEG7_NUMERIC \
+ _MAP_58_64_ASCII_SEG7_SYMBOL \
+ _MAP_65_90_ASCII_SEG7_ALPHA_UPPR \
+ _MAP_91_96_ASCII_SEG7_SYMBOL \
+ _MAP_97_122_ASCII_SEG7_ALPHA_LOWER \
+ _MAP_123_126_ASCII_SEG7_SYMBOL
+
+/* This set tries to map as close as possible to the symbolic characteristics
+ * of the ASCII character for maximum discrimination.
+ * For now this means all alpha chars are in lower case representations.
+ * (This for example facilitates the use of hex numbers with uppercase input.)
+ */
+#define MAP_ASCII7SEG_ALPHANUM_LC \
+ _MAP_0_32_ASCII_SEG7_NON_PRINTABLE \
+ _MAP_33_47_ASCII_SEG7_SYMBOL \
+ _MAP_48_57_ASCII_SEG7_NUMERIC \
+ _MAP_58_64_ASCII_SEG7_SYMBOL \
+ _MAP_97_122_ASCII_SEG7_ALPHA_LOWER \
+ _MAP_91_96_ASCII_SEG7_SYMBOL \
+ _MAP_97_122_ASCII_SEG7_ALPHA_LOWER \
+ _MAP_123_126_ASCII_SEG7_SYMBOL
+
+#define SEG7_DEFAULT_MAP(_name) \
+ SEG7_CONVERSION_MAP(_name, MAP_ASCII7SEG_ALPHANUM)
+
+#endif /* MAP_TO_7SEGMENT_H */
generated by cgit v1.2.3 (git 2.39.1) at 2026-04-05 14:05:24 +0000