56 lines
1.3 KiB
C
56 lines
1.3 KiB
C
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#ifndef lint
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static char rcsid[] = "$Id$";
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#endif
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#include <arch/io.h>
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#include <subr.h>
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/* much better keyboard init courtesy ollie@sis.com.tw
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TODO: Typematic Setting, the keyboard is too slow for me */
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void pc_keyboard_init()
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{
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volatile unsigned char regval;
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/* send cmd = 0xAA, self test 8042 */
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outb(0xaa, 0x64);
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/* empty input buffer or any other command/data will be lost */
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while ((inb(0x64) & 0x02))
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post_code(0);
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/* empty output buffer or any other command/data will be lost */
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while ((inb(0x64) & 0x01) == 0)
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post_code(1);
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/* read self-test result, 0x55 should be returned form 0x60 */
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if ((regval = inb(0x60) != 0x55))
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return;
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/* enable keyboard interface */
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outb(0x60, 0x64);
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while ((inb(0x64) & 0x02))
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post_code(2);
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/* send cmd: enable IRQ 1 */
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outb(0x61, 0x60);
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while ((inb(0x64) & 0x02))
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post_code(3);
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/* reset kerboard and self test (keyboard side) */
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outb(0xff, 0x60);
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/* empty inut bufferm or any other command/data will be lost */
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while ((inb(0x64) & 0x02))
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post_code(4);
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/* empty output buffer or any other command/data will be lost */
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while ((inb(0x64) & 0x01) == 0)
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post_code(5);
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if ((regval = inb(0x60) != 0xfa))
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return;
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while ((inb(0x64) & 0x01) == 0)
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post_code(6);
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if ((regval = inb(0x60) != 0xaa))
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return;
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}
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