1/*	$NetBSD: kbd.c,v 1.6 2009/03/14 15:36:04 dsl 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#if defined(CONS_BE) || defined(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
53u_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
63const 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
82int
83kbd(int noblock)
84{
85	u_char dt, brk, act;
86	int first = 1;
87
88loop:
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
170void
171kbdreset(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
199int
200kbd_getc(void)
201{
202	int c;
203	while ((c = kbd(0)) == 0)
204		;
205	return (c);
206}
207
208int
209kbd_test(void)
210{
211	return ((inb(KBSTATP) & KBINRDY) != 0);
212}
213#endif /* CONS_BE || CONS_VGA*/
214