On Thu, 2002-10-24 at 09:58, Adam Sulmicki wrote:
> > Is it possible that your BIOS reprogrammed the keyboard controller
> > in the wrong way ??
>
> it is possible, in fact it the only unchecked list on my To Check
> List:
> PIC not getting (re) programmed CHECK
> PIC interrupt mask is wrong CHECK
> IF flag being cleared CHECK
> keyboard controller ????
>
> so I guess that leaves the keyboard controller only.
> That brings me to the point, what sort of references did you
> use to write
>
> cvs-freebios/freebios/src/pc80/keyboard.c
>
Here is the more solid and well documented version which is used in our
internal version of etherboot.
void pc_keyboard_init()
{
volatile unsigned char regval;
/* ------------------- controller side ----------------------*/
printf("reset keyboard \n");
/* 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))
printf("self test failed\n");
/* send cmd = 0xAA, keyboard interface test */
outb(0xab, 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 keyboard interface test result, 0x00 should be returned form
0x60 */
if ((regval = inb(0x60) != 0x00))
printf("keyboard interface test failed\n");
/* Enable Keyboard clock */
outb(0xae, 0x64);
outb(0xa8, 0x64);
/* ------------------- keyboard side ------------------------*/
/* reset kerboard and self test (keyboard side) */
outb(0xff, 0x60);
/* empty inut buffer 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);
/* keyboard should return ACK */
if ((regval = inb(0x60) != 0xfa))
printf("keyboard self test failed\n");
while ((inb(0x64) & 0x01) == 0)
post_code(6);
if ((regval = inb(0x60) != 0xaa))
printf("keyboard self test failed\n");
/* Disable keyboard */
outb(0xf5, 0x60);
/* empty inut buffer 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);
/* keyboard should return ACK */
if ((regval = inb(0x60) != 0xfa))
printf("disable keyboard failed\n");
/* Write Keyboard Mode */
outb(0x60, 0x64);
while ((inb(0x64) & 0x02))
post_code(2);
/* send cmd: scan code convert, disable mouse, enable IRQ 1 */
outb(0x61, 0x60);
while ((inb(0x64) & 0x02))
post_code(3);
/* Enable keyboard */
outb(0xf4, 0x60);
/* empty inut buffer 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);
/* keyboard should return ACK */
if ((regval = inb(0x60) != 0xfa))
printf("enable keyboard failed\n");
}
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