blob: 9dc56b569854ecfc508357944269cfcb33ec6af4 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
#ifndef lint
static char rcsid[] = "$Id$";
#endif
#include <arch/io.h>
#include <subr.h>
/* much better keyboard init courtesy ollie@sis.com.tw
TODO: Typematic Setting, the keyboard is too slow for me */
void pc_keyboard_init()
{
volatile unsigned char regval;
/* send cmd = 0xAA, self test 8042 */
outb(0xaa, 0x64);
/* empty input buffer or any other command/data will be lost */
while ((inb(0x64) & 0x02))
post_code(0);
/* empty output buffer or any other command/data will be lost */
while ((inb(0x64) & 0x01) == 0)
post_code(1);
/* read self-test result, 0x55 should be returned form 0x60 */
if ((regval = inb(0x60) != 0x55))
return;
/* enable keyboard interface */
outb(0x60, 0x64);
while ((inb(0x64) & 0x02))
post_code(2);
/* send cmd: enable IRQ 1 */
outb(0x61, 0x60);
while ((inb(0x64) & 0x02))
post_code(3);
/* reset kerboard and self test (keyboard side) */
outb(0xff, 0x60);
/* empty inut bufferm or any other command/data will be lost */
while ((inb(0x64) & 0x02))
post_code(4);
/* empty output buffer or any other command/data will be lost */
while ((inb(0x64) & 0x01) == 0)
post_code(5);
if ((regval = inb(0x60) != 0xfa))
return;
while ((inb(0x64) & 0x01) == 0)
post_code(6);
if ((regval = inb(0x60) != 0xaa))
return;
}
|
