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keyboard support

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git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1146 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Ronald G. Minnich
2003-09-26 15:24:54 +00:00
parent e1313fa183
commit ef5f21807a
2 changed files with 60 additions and 1 deletions
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55
src/pc80/keyboard.c Normal file
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@@ -0,0 +1,55 @@
#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;
}