[net-next-2.6.git] / include / linux / map_to_7segment.h

/*
 * Copyright (c) 2005 Henk Vergonet <Henk.Vergonet@gmail.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#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: http://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 show_map(struct device *dev, char *buf) {
 *	memcpy(buf, &map_seg7, sizeof(map_seg7));
 *	return sizeof(map_seg7);
 * }
 * static ssize_t store_map(struct device *dev, const char *buf, size_t cnt) {
 *	if(cnt != sizeof(map_seg7))
 *		return -EINVAL;
 *	memcpy(&map_seg7, buf, cnt);
 *	return cnt;
 * }
 * static DEVICE_ATTR(map_seg7, PERMS_RW, show_map, store_map);
 *
 * 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 */
Commit	Line	Data
aca951a2	1	/*
aca951a2 HV	2	* Copyright (c) 2005 Henk Vergonet <Henk.Vergonet@gmail.com>
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License as
	6	* published by the Free Software Foundation; either version 2 of
	7	* the License, or (at your option) any later version.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software
	16	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	17	*/
	18
	19	#ifndef MAP_TO_7SEGMENT_H
	20	#define MAP_TO_7SEGMENT_H
	21
	22	/* This file provides translation primitives and tables for the conversion
	23	* of (ASCII) characters to a 7-segments notation.
	24	*
	25	* The 7 segment's wikipedia notation below is used as standard.
	26	* See: http://en.wikipedia.org/wiki/Seven_segment_display
	27	*
	28	* Notation: +-a-+
	29	* f b
	30	* +-g-+
	31	* e c
	32	* +-d-+
	33	*
	34	* Usage:
	35	*
	36	* Register a map variable, and fill it with a character set:
f9da8d15	37	* static SEG7_DEFAULT_MAP(map_seg7);
aca951a2 HV	38	*
	39	*
	40	* Then use for conversion:
	41	* seg7 = map_to_seg7(&map_seg7, some_char);
	42	* ...
	43	*
	44	* In device drivers it is recommended, if required, to make the char map
	45	* accessible via the sysfs interface using the following scheme:
	46	*
	47	* static ssize_t show_map(struct device dev, char buf) {
	48	* memcpy(buf, &map_seg7, sizeof(map_seg7));
	49	* return sizeof(map_seg7);
	50	* }
	51	* static ssize_t store_map(struct device dev, const char buf, size_t cnt) {
	52	* if(cnt != sizeof(map_seg7))
	53	* return -EINVAL;
	54	* memcpy(&map_seg7, buf, cnt);
	55	* return cnt;
	56	* }
	57	* static DEVICE_ATTR(map_seg7, PERMS_RW, show_map, store_map);
	58	*
	59	* History:
	60	* 2005-05-31 RFC linux-kernel@vger.kernel.org
	61	*/
	62	#include <linux/errno.h>
	63
	64
	65	#define BIT_SEG7_A 0
	66	#define BIT_SEG7_B 1
	67	#define BIT_SEG7_C 2
	68	#define BIT_SEG7_D 3
	69	#define BIT_SEG7_E 4
	70	#define BIT_SEG7_F 5
	71	#define BIT_SEG7_G 6
	72	#define BIT_SEG7_RESERVED 7
	73
	74	struct seg7_conversion_map {
	75	unsigned char table[128];
	76	};
	77
34a4c5eb	78	static __inline__ int map_to_seg7(struct seg7_conversion_map *map, int c)
aca951a2	79	{
af64a5eb	80	return c >= 0 && c < sizeof(map->table) ? map->table[c] : -EINVAL;
aca951a2 HV	81	}
	82
	83	#define SEG7_CONVERSION_MAP(_name, _map) \
	84	struct seg7_conversion_map _name = { .table = { _map } }
	85
	86	/*
	87	* It is recommended to use a facility that allows user space to redefine
	88	* custom character sets for LCD devices. Please use a sysfs interface
	89	* as described above.
	90	*/
	91	#define MAP_TO_SEG7_SYSFS_FILE "map_seg7"
	92
	93	/*******************************************************************************
	94	* ASCII conversion table
	95	******************************************************************************/
	96
	97	#define _SEG7(l,a,b,c,d,e,f,g) \
	98	( a<<BIT_SEG7_A \| b<<BIT_SEG7_B \| c<<BIT_SEG7_C \| d<<BIT_SEG7_D \| \
	99	e<<BIT_SEG7_E \| f<<BIT_SEG7_F \| g<<BIT_SEG7_G )
	100
	101	#define _MAP_0_32_ASCII_SEG7_NON_PRINTABLE \
	102	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,
	103
	104	#define _MAP_33_47_ASCII_SEG7_SYMBOL \
	105	_SEG7('!',0,0,0,0,1,1,0), _SEG7('"',0,1,0,0,0,1,0), _SEG7('#',0,1,1,0,1,1,0),\
	106	_SEG7('$',1,0,1,1,0,1,1), _SEG7('%',0,0,1,0,0,1,0), _SEG7('&',1,0,1,1,1,1,1),\
	107	_SEG7('\'',0,0,0,0,0,1,0),_SEG7('(',1,0,0,1,1,1,0), _SEG7(')',1,1,1,1,0,0,0),\
	108	_SEG7('*',0,1,1,0,1,1,1), _SEG7('+',0,1,1,0,0,0,1), _SEG7(',',0,0,0,0,1,0,0),\
	109	_SEG7('-',0,0,0,0,0,0,1), _SEG7('.',0,0,0,0,1,0,0), _SEG7('/',0,1,0,0,1,0,1),
	110
	111	#define _MAP_48_57_ASCII_SEG7_NUMERIC \
	112	_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),\
	113	_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),\
	114	_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),\
	115	_SEG7('9',1,1,1,1,0,1,1),
	116
	117	#define _MAP_58_64_ASCII_SEG7_SYMBOL \
	118	_SEG7(':',0,0,0,1,0,0,1), _SEG7(';',0,0,0,1,0,0,1), _SEG7('<',1,0,0,0,0,1,1),\
	119	_SEG7('=',0,0,0,1,0,0,1), _SEG7('>',1,1,0,0,0,0,1), _SEG7('?',1,1,1,0,0,1,0),\
	120	_SEG7('@',1,1,0,1,1,1,1),
	121
	122	#define _MAP_65_90_ASCII_SEG7_ALPHA_UPPR \
	123	_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),\
	124	_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),\
	125	_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),\
	126	_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),\
	127	_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),\
	128	_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),\
	129	_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),\
	130	_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),\
	131	_SEG7('Y',0,1,1,0,0,1,1), _SEG7('Z',1,1,0,1,1,0,1),
	132
	133	#define _MAP_91_96_ASCII_SEG7_SYMBOL \
	134	_SEG7('[',1,0,0,1,1,1,0), _SEG7('\\',0,0,1,0,0,1,1),_SEG7(']',1,1,1,1,0,0,0),\
	135	_SEG7('^',1,1,0,0,0,1,0), _SEG7('_',0,0,0,1,0,0,0), _SEG7('`',0,1,0,0,0,0,0),
	136
	137	#define _MAP_97_122_ASCII_SEG7_ALPHA_LOWER \
	138	_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),\
	139	_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),\
	140	_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),\
	141	_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),\
	142	_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),\
	143	_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),\
	144	_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),\
145	_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),\
146	_SEG7('y',0,1,1,1,0,1,1), _SEG7('Z',1,1,0,1,1,0,1),
147
148	#define _MAP_123_126_ASCII_SEG7_SYMBOL \
149	_SEG7('{',1,0,0,1,1,1,0), _SEG7('\|',0,0,0,0,1,1,0), _SEG7('}',1,1,1,1,0,0,0),\
150	_SEG7('~',1,0,0,0,0,0,0),
151
152	/* Maps */
153
154	/* This set tries to map as close as possible to the visible characteristics
155	* of the ASCII symbol, lowercase and uppercase letters may differ in
156	* presentation on the display.
157	*/
158	#define MAP_ASCII7SEG_ALPHANUM \
159	_MAP_0_32_ASCII_SEG7_NON_PRINTABLE \
160	_MAP_33_47_ASCII_SEG7_SYMBOL \
161	_MAP_48_57_ASCII_SEG7_NUMERIC \
162	_MAP_58_64_ASCII_SEG7_SYMBOL \
163	_MAP_65_90_ASCII_SEG7_ALPHA_UPPR \
164	_MAP_91_96_ASCII_SEG7_SYMBOL \
165	_MAP_97_122_ASCII_SEG7_ALPHA_LOWER \
166	_MAP_123_126_ASCII_SEG7_SYMBOL
167
168	/* This set tries to map as close as possible to the symbolic characteristics
169	* of the ASCII character for maximum discrimination.
170	* For now this means all alpha chars are in lower case representations.
171	* (This for example facilitates the use of hex numbers with uppercase input.)
172	*/
173	#define MAP_ASCII7SEG_ALPHANUM_LC \
174	_MAP_0_32_ASCII_SEG7_NON_PRINTABLE \
175	_MAP_33_47_ASCII_SEG7_SYMBOL \
176	_MAP_48_57_ASCII_SEG7_NUMERIC \
177	_MAP_58_64_ASCII_SEG7_SYMBOL \
178	_MAP_97_122_ASCII_SEG7_ALPHA_LOWER \
179	_MAP_91_96_ASCII_SEG7_SYMBOL \
180	_MAP_97_122_ASCII_SEG7_ALPHA_LOWER \
181	_MAP_123_126_ASCII_SEG7_SYMBOL
182
183	#define SEG7_DEFAULT_MAP(_name) \
184	SEG7_CONVERSION_MAP(_name,MAP_ASCII7SEG_ALPHANUM)
185
186	#endif /* MAP_TO_7SEGMENT_H */
187