/* $NetBSD: kbd.c,v 1.3 2006/04/10 18:40:06 garbled Exp $ */
/*-
* Copyright (C) 1995-1997 Gary Thomas (
[email protected])
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Gary Thomas.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef CONS_VGA
#include <lib/libsa/stand.h>
#include "boot.h"
/*
* Keyboard handler
*/
#define L 0x0001 /* locking function */
#define SHF 0x0002 /* keyboard shift */
#define ALT 0x0004 /* alternate shift -- alternate chars */
#define NUM 0x0008 /* numeric shift cursors vs. numeric */
#define CTL 0x0010 /* control shift -- allows ctl function */
#define CPS 0x0020 /* caps shift -- swaps case of letter */
#define ASCII 0x0040 /* ascii code for this key */
#define STP 0x0080 /* stop output */
#define FUNC 0x0100 /* function key */
#define SCROLL 0x0200 /* scroll lock key */
#include "pcconstab.US"
u_char shfts, ctls, alts, caps, num, stp;
#define KBDATAP 0x60 /* kbd data port */
#define KBSTATUSPORT 0x61 /* kbd status */
#define KBSTATP 0x64 /* kbd status port */
#define KBINRDY 0x01
#define KBOUTRDY 0x02
#define _x__ 0x00 /* Unknown / unmapped */
const u_char keycode[] = {
_x__, 0x43, 0x41, 0x3F, 0x3D, 0x3B, 0x3C, _x__, /* 0x00-0x07 */
_x__, 0x44, 0x42, 0x40, 0x3E, 0x0F, 0x29, _x__, /* 0x08-0x0F */
_x__, 0x38, 0x2A, _x__, 0x1D, 0x10, 0x02, _x__, /* 0x10-0x17 */
_x__, _x__, 0x2C, 0x1F, 0x1E, 0x11, 0x03, _x__, /* 0x18-0x1F */
_x__, 0x2E, 0x2D, 0x20, 0x12, 0x05, 0x04, _x__, /* 0x20-0x27 */
_x__, 0x39, 0x2F, 0x21, 0x14, 0x13, 0x06, _x__, /* 0x28-0x2F */
_x__, 0x31, 0x30, 0x23, 0x22, 0x15, 0x07, _x__, /* 0x30-0x37 */
_x__, _x__, 0x32, 0x24, 0x16, 0x08, 0x09, _x__, /* 0x38-0x3F */
_x__, 0x33, 0x25, 0x17, 0x18, 0x0B, 0x0A, _x__, /* 0x40-0x47 */
_x__, 0x34, 0x35, 0x26, 0x27, 0x19, 0x0C, _x__, /* 0x48-0x4F */
_x__, _x__, 0x28, _x__, 0x1A, 0x0D, _x__, _x__, /* 0x50-0x57 */
0x3A, 0x36, 0x1C, 0x1B, _x__, 0x2B, _x__, _x__, /* 0x58-0x5F */
_x__, _x__, _x__, _x__, _x__, _x__, 0x0E, _x__, /* 0x60-0x67 */
_x__, 0x4F, _x__, 0x4B, 0x47, _x__, _x__, _x__, /* 0x68-0x6F */
0x52, 0x53, 0x50, 0x4C, 0x4D, 0x48, 0x01, 0x45, /* 0x70-0x77 */
_x__, 0x4E, 0x51, 0x4A, _x__, 0x49, 0x46, 0x54, /* 0x78-0x7F */
};
int
kbd(int noblock)
{
u_char dt, brk, act;
int first = 1;
loop:
if (noblock) {
if ((inb(KBSTATP) & KBINRDY) == 0)
return (-1);
} else while ((inb(KBSTATP) & KBINRDY) == 0)
;
dt = inb(KBDATAP);
brk = dt & 0x80; /* brk == 1 on key release */
dt = dt & 0x7f; /* keycode */
act = action[dt];
if (act & SHF)
shfts = brk ? 0 : 1;
if (act & ALT)
alts = brk ? 0 : 1;
if (act & NUM) {
if (act & L) {
/* NUM lock */
if (!brk)
num = !num;
} else {
num = brk ? 0 : 1;
}
}
if (act & CTL)
ctls = brk ? 0 : 1;
if (act & CPS) {
if (act & L) {
/* CAPS lock */
if (!brk)
caps = !caps;
} else {
caps = brk ? 0 : 1;
}
}
if (act & STP) {
if (act & L) {
if (!brk)
stp = !stp;
} else {
stp = brk ? 0 : 1;
}
}
if ((act & ASCII) && !brk) {
u_char chr;
if (shfts)
chr = shift[dt];
else if (ctls)
chr = ctl[dt];
else
chr = unshift[dt];
if (alts)
chr |= 0x80;
if (caps && (chr >= 'a' && chr <= 'z'))
chr -= 'a' - 'A';
#define CTRL(s) (s & 0x1F)
if ((chr == '\r') || (chr == '\n') ||
(chr == CTRL('A')) || (chr == CTRL('S'))) {
/* Wait for key up */
while (1)
{
while ((inb(KBSTATP) & KBINRDY) == 0)
;
dt = inb(KBDATAP);
if (dt & 0x80) /* key up */ break;
}
}
return (chr);
}
if (first && brk)
return (0); /* Ignore initial 'key up' codes */
goto loop;
}
void
kbdreset(void)
{
u_char c;
int i;
/* Send self-test */
while (inb(KBSTATP) & KBOUTRDY)
;
outb(KBSTATP, 0xAA);
while ((inb(KBSTATP) & KBINRDY) == 0) /* wait input ready */
;
if ((c = inb(KBDATAP)) != 0x55) {
printf("Keyboard self test failed - result: %x\n", c);
}
/* Enable interrupts and keyboard controller */
while (inb(KBSTATP) & KBOUTRDY)
;
outb(KBSTATP, 0x60);
while (inb(KBSTATP) & KBOUTRDY)
;
outb(KBDATAP, 0x45);
for (i = 0; i < 10000; i++)
;
while (inb(KBSTATP) & KBOUTRDY)
;
outb(KBSTATP, 0xAE);
}
int
kbd_getc(void)
{
int c;
while ((c = kbd(0)) == 0)
;
return (c);
}
#endif /* CONS_VGA */
