From patchwork Fri Jun 25 12:58:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 467543 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6DC87C2B9F4 for ; Fri, 25 Jun 2021 12:59:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5E5AF61469 for ; Fri, 25 Jun 2021 12:59:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231806AbhFYNB4 (ORCPT ); Fri, 25 Jun 2021 09:01:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37150 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231689AbhFYNBm (ORCPT ); Fri, 25 Jun 2021 09:01:42 -0400 Received: from xavier.telenet-ops.be (xavier.telenet-ops.be [IPv6:2a02:1800:120:4::f00:14]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E734FC061145 for ; Fri, 25 Jun 2021 05:59:17 -0700 (PDT) Received: from ramsan.of.borg ([IPv6:2a02:1810:ac12:ed20:1476:ce84:e216:add8]) by xavier.telenet-ops.be with bizsmtp id MQzC2500C2B1U9901QzCdl; Fri, 25 Jun 2021 14:59:13 +0200 Received: from rox.of.borg ([192.168.97.57]) by ramsan.of.borg with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1lwlQN-003TMA-UH; Fri, 25 Jun 2021 14:59:11 +0200 Received: from geert by rox.of.borg with local (Exim 4.93) (envelope-from ) id 1lwlQN-004sQ2-FA; Fri, 25 Jun 2021 14:59:11 +0200 From: Geert Uytterhoeven To: Robin van der Gracht , Rob Herring , Miguel Ojeda , Paul Burton , Greg Kroah-Hartman , Pavel Machek Cc: devicetree@vger.kernel.org, linux-leds@vger.kernel.org, linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH v2 01/18] uapi: Add Date: Fri, 25 Jun 2021 14:58:45 +0200 Message-Id: <20210625125902.1162428-2-geert@linux-m68k.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210625125902.1162428-1-geert@linux-m68k.org> References: <20210625125902.1162428-1-geert@linux-m68k.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add a header file providing translation primitives and tables for the conversion of (ASCII) characters to a 14-segments notation, as used by 14-segment alphanumeric displays. This follows the spirit of include/uapi/linux/map_to_7segment.h. Signed-off-by: Geert Uytterhoeven --- v2: - No changes. You can find an image of the full character set at https://drive.google.com/file/d/1h3EYFBWHIjh8B_cwPA5ocAD-lFYipRie/view Note that all non-empty characters are unique, except for "[" and "C", and "|" and ":". --- include/uapi/linux/map_to_14segment.h | 239 ++++++++++++++++++++++++++ 1 file changed, 239 insertions(+) create mode 100644 include/uapi/linux/map_to_14segment.h diff --git a/include/uapi/linux/map_to_14segment.h b/include/uapi/linux/map_to_14segment.h new file mode 100644 index 0000000000000000..957c3c43181043c5 --- /dev/null +++ b/include/uapi/linux/map_to_14segment.h @@ -0,0 +1,239 @@ +/* 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 + */ + +#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 +#include + +#include + +#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) +{ + return c >= 0 && c < sizeof(map->table) ? __be16_to_cpu(map->table[c]) + : -EINVAL; +} + +#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 */