source: mainline/kernel/genarch/src/srln/srln.c@ c8bf88d

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since c8bf88d was c8bf88d, checked in by Martin Decky <martin@…>, 16 years ago

represent special keystrokes (cursor arrows, page up/down, delete, etc.) as appropriate Unicode characters
do not parse ANSI control sequences in kconsole, but in serial line driver
  • Property mode set to 100644
File size: 3.2 KB
Line 
1/*
2 * Copyright (c) 2009 Jakub Jermar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup genarch
30 * @{
31 */
32/**
33 * @file
34 * @brief Serial line processing.
35 */
36
37#include <genarch/srln/srln.h>
38#include <console/chardev.h>
39#include <console/console.h>
40#include <proc/thread.h>
41#include <arch.h>
42#include <string.h>
43
44static indev_t srlnout;
45
46indev_operations_t srlnout_ops = {
47 .poll = NULL
48};
49
50static void ksrln(void *arg)
51{
52 indev_t *in = (indev_t *) arg;
53 bool cr = false;
54 uint32_t escape = 0;
55
56 while (true) {
57 wchar_t ch = _getc(in);
58
59 /* ANSI escape sequence processing */
60 if (escape != 0) {
61 escape <<= 8;
62 escape |= ch & 0xff;
63
64 if ((escape == 0x1b4f) || (escape == 0x1b5b) || (escape == 0x1b5b33))
65 continue;
66
67 switch (escape) {
68 case 0x1b4f46:
69 case 0x1b5b46:
70 ch = U_END_ARROW;
71 escape = 0;
72 break;
73 case 0x1b4f48:
74 case 0x1b5b48:
75 ch = U_HOME_ARROW;
76 escape = 0;
77 break;
78 case 0x1b5b41:
79 ch = U_UP_ARROW;
80 escape = 0;
81 break;
82 case 0x1b5b42:
83 ch = U_DOWN_ARROW;
84 escape = 0;
85 break;
86 case 0x1b5b43:
87 ch = U_RIGHT_ARROW;
88 escape = 0;
89 break;
90 case 0x1b5b44:
91 ch = U_LEFT_ARROW;
92 escape = 0;
93 break;
94 case 0x1b5b337e:
95 ch = U_DELETE;
96 escape = 0;
97 break;
98 default:
99 escape = 0;
100 }
101 }
102
103 if (ch == 0x1b) {
104 escape = ch & 0xff;
105 continue;
106 }
107
108 /* Replace carriage return with line feed
109 and suppress any following line feed */
110 if ((ch == '\n') && (cr)) {
111 cr = false;
112 continue;
113 }
114
115 if (ch == '\r') {
116 ch = '\n';
117 cr = true;
118 } else
119 cr = false;
120
121 /* Backspace */
122 if (ch == 0x7f)
123 ch = '\b';
124
125 indev_push_character(stdin, ch);
126 }
127}
128
129void srln_init(indev_t *devin)
130{
131 indev_initialize("srln", &srlnout, &srlnout_ops);
132 thread_t *thread
133 = thread_create(ksrln, devin, TASK, 0, "ksrln", false);
134
135 if (thread) {
136 stdin = &srlnout;
137 thread_ready(thread);
138 }
139}
140
141/** @}
142 */
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