2 * This file is part of the libpayload project.
4 * Copyright (C) 2008 Advanced Micro Devices, Inc.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. 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 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <libpayload.h>
32 unsigned char map[2][0x57] = {
34 0x00, 0x1B, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36,
35 0x37, 0x38, 0x39, 0x30, 0x2D, 0x3D, 0x08, 0x09,
36 0x71, 0x77, 0x65, 0x72, 0x74, 0x79, 0x75, 0x69,
37 0x6F, 0x70, 0x5B, 0x5D, 0x0A, 0x00, 0x61, 0x73,
38 0x64, 0x66, 0x67, 0x68, 0x6A, 0x6B, 0x6C, 0x3B,
39 0x27, 0x60, 0x00, 0x5C, 0x7A, 0x78, 0x63, 0x76,
40 0x62, 0x6E, 0x6D, 0x2C, 0x2E, 0x2F, 0x00, 0x2A,
44 0x00, 0x1B, 0x21, 0x40, 0x23, 0x24, 0x25, 0x5E,
45 0x26, 0x2A, 0x28, 0x29, 0x5F, 0x2B, 0x08, 0x00,
46 0x51, 0x57, 0x45, 0x52, 0x54, 0x59, 0x55, 0x49,
47 0x4F, 0x50, 0x7B, 0x7D, 0x0A, 0x00, 0x41, 0x53,
48 0x44, 0x46, 0x47, 0x48, 0x4A, 0x4B, 0x4C, 0x3A,
49 0x22, 0x7E, 0x00, 0x7C, 0x5A, 0x58, 0x43, 0x56,
50 0x42, 0x4E, 0x4D, 0x3C, 0x3E, 0x3F, 0x00, 0x2A,
57 #define MOD_CAPSLOCK 4
59 int keyboard_havechar(void)
61 unsigned char c = inb(0x64);
65 unsigned char keyboard_get_scancode(void)
69 if (keyboard_havechar())
75 int keyboard_getchar(void)
82 while (!keyboard_havechar()) ;
84 ch = keyboard_get_scancode();
89 modifier &= ~MOD_SHIFT;
93 modifier |= MOD_SHIFT;
95 modifier &= ~MOD_CTRL;
101 if (modifier & MOD_CAPSLOCK)
102 modifier &= ~MOD_CAPSLOCK;
104 modifier |= MOD_CAPSLOCK;
108 if (!(ch & 0x80) && ch < 0x57) {
110 (modifier & MOD_SHIFT) ^ (modifier & MOD_CAPSLOCK) ? 1 : 0;
111 ret = map[shift][ch];
113 if (modifier & MOD_CTRL)
114 ret = (ret >= 0x3F && ret <= 0x5F) ? ret & 0x1f : 0;