1 /* $NetBSD: kbd.c,v 1.3 2006/04/10 18:40:06 garbled Exp $ */
2
3 /*-
4 * Copyright (C) 1995-1997 Gary Thomas (gdt@linuxppc.org)
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Gary Thomas.
18 * 4. The name of the author may not be used to endorse or promote products
19 * derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #ifdef CONS_VGA
34 #include <lib/libsa/stand.h>
35 #include "boot.h"
36
37 /*
38 * Keyboard handler
39 */
40 #define L 0x0001 /* locking function */
41 #define SHF 0x0002 /* keyboard shift */
42 #define ALT 0x0004 /* alternate shift -- alternate chars */
43 #define NUM 0x0008 /* numeric shift cursors vs. numeric */
44 #define CTL 0x0010 /* control shift -- allows ctl function */
45 #define CPS 0x0020 /* caps shift -- swaps case of letter */
46 #define ASCII 0x0040 /* ascii code for this key */
47 #define STP 0x0080 /* stop output */
48 #define FUNC 0x0100 /* function key */
49 #define SCROLL 0x0200 /* scroll lock key */
50
51 #include "pcconstab.US"
52
53 u_char shfts, ctls, alts, caps, num, stp;
54
55 #define KBDATAP 0x60 /* kbd data port */
56 #define KBSTATUSPORT 0x61 /* kbd status */
57 #define KBSTATP 0x64 /* kbd status port */
58 #define KBINRDY 0x01
59 #define KBOUTRDY 0x02
60
61 #define _x__ 0x00 /* Unknown / unmapped */
62
63 const u_char keycode[] = {
64 _x__, 0x43, 0x41, 0x3F, 0x3D, 0x3B, 0x3C, _x__, /* 0x00-0x07 */
65 _x__, 0x44, 0x42, 0x40, 0x3E, 0x0F, 0x29, _x__, /* 0x08-0x0F */
66 _x__, 0x38, 0x2A, _x__, 0x1D, 0x10, 0x02, _x__, /* 0x10-0x17 */
67 _x__, _x__, 0x2C, 0x1F, 0x1E, 0x11, 0x03, _x__, /* 0x18-0x1F */
68 _x__, 0x2E, 0x2D, 0x20, 0x12, 0x05, 0x04, _x__, /* 0x20-0x27 */
69 _x__, 0x39, 0x2F, 0x21, 0x14, 0x13, 0x06, _x__, /* 0x28-0x2F */
70 _x__, 0x31, 0x30, 0x23, 0x22, 0x15, 0x07, _x__, /* 0x30-0x37 */
71 _x__, _x__, 0x32, 0x24, 0x16, 0x08, 0x09, _x__, /* 0x38-0x3F */
72 _x__, 0x33, 0x25, 0x17, 0x18, 0x0B, 0x0A, _x__, /* 0x40-0x47 */
73 _x__, 0x34, 0x35, 0x26, 0x27, 0x19, 0x0C, _x__, /* 0x48-0x4F */
74 _x__, _x__, 0x28, _x__, 0x1A, 0x0D, _x__, _x__, /* 0x50-0x57 */
75 0x3A, 0x36, 0x1C, 0x1B, _x__, 0x2B, _x__, _x__, /* 0x58-0x5F */
76 _x__, _x__, _x__, _x__, _x__, _x__, 0x0E, _x__, /* 0x60-0x67 */
77 _x__, 0x4F, _x__, 0x4B, 0x47, _x__, _x__, _x__, /* 0x68-0x6F */
78 0x52, 0x53, 0x50, 0x4C, 0x4D, 0x48, 0x01, 0x45, /* 0x70-0x77 */
79 _x__, 0x4E, 0x51, 0x4A, _x__, 0x49, 0x46, 0x54, /* 0x78-0x7F */
80 };
81
82 int
kbd(int noblock)83 kbd(int noblock)
84 {
85 u_char dt, brk, act;
86 int first = 1;
87
88 loop:
89 if (noblock) {
90 if ((inb(KBSTATP) & KBINRDY) == 0)
91 return (-1);
92 } else while ((inb(KBSTATP) & KBINRDY) == 0)
93 ;
94
95 dt = inb(KBDATAP);
96
97 brk = dt & 0x80; /* brk == 1 on key release */
98 dt = dt & 0x7f; /* keycode */
99
100 act = action[dt];
101 if (act & SHF)
102 shfts = brk ? 0 : 1;
103 if (act & ALT)
104 alts = brk ? 0 : 1;
105 if (act & NUM) {
106 if (act & L) {
107 /* NUM lock */
108 if (!brk)
109 num = !num;
110 } else {
111 num = brk ? 0 : 1;
112 }
113 }
114 if (act & CTL)
115 ctls = brk ? 0 : 1;
116 if (act & CPS) {
117 if (act & L) {
118 /* CAPS lock */
119 if (!brk)
120 caps = !caps;
121 } else {
122 caps = brk ? 0 : 1;
123 }
124 }
125 if (act & STP) {
126 if (act & L) {
127 if (!brk)
128 stp = !stp;
129 } else {
130 stp = brk ? 0 : 1;
131 }
132 }
133
134 if ((act & ASCII) && !brk) {
135 u_char chr;
136
137 if (shfts)
138 chr = shift[dt];
139 else if (ctls)
140 chr = ctl[dt];
141 else
142 chr = unshift[dt];
143
144 if (alts)
145 chr |= 0x80;
146
147 if (caps && (chr >= 'a' && chr <= 'z'))
148 chr -= 'a' - 'A';
149 #define CTRL(s) (s & 0x1F)
150 if ((chr == '\r') || (chr == '\n') ||
151 (chr == CTRL('A')) || (chr == CTRL('S'))) {
152
153 /* Wait for key up */
154 while (1)
155 {
156 while ((inb(KBSTATP) & KBINRDY) == 0)
157 ;
158 dt = inb(KBDATAP);
159 if (dt & 0x80) /* key up */ break;
160 }
161 }
162 return (chr);
163 }
164
165 if (first && brk)
166 return (0); /* Ignore initial 'key up' codes */
167 goto loop;
168 }
169
170 void
kbdreset(void)171 kbdreset(void)
172 {
173 u_char c;
174 int i;
175
176 /* Send self-test */
177 while (inb(KBSTATP) & KBOUTRDY)
178 ;
179 outb(KBSTATP, 0xAA);
180 while ((inb(KBSTATP) & KBINRDY) == 0) /* wait input ready */
181 ;
182 if ((c = inb(KBDATAP)) != 0x55) {
183 printf("Keyboard self test failed - result: %x\n", c);
184 }
185 /* Enable interrupts and keyboard controller */
186 while (inb(KBSTATP) & KBOUTRDY)
187 ;
188 outb(KBSTATP, 0x60);
189 while (inb(KBSTATP) & KBOUTRDY)
190 ;
191 outb(KBDATAP, 0x45);
192 for (i = 0; i < 10000; i++)
193 ;
194 while (inb(KBSTATP) & KBOUTRDY)
195 ;
196 outb(KBSTATP, 0xAE);
197 }
198
199 int
kbd_getc(void)200 kbd_getc(void)
201 {
202 int c;
203 while ((c = kbd(0)) == 0)
204 ;
205 return (c);
206 }
207 #endif /* CONS_VGA */
208