static void
pckbd_timeout(void *arg)
{
keyboard_t *kbd;
int s;
/* The following comments are extracted from syscons.c (1.287) */
/*
* With release 2.1 of the Xaccel server, the keyboard is left
* hanging pretty often. Apparently an interrupt from the
* keyboard is lost, and I don't know why (yet).
* This ugly hack calls scintr if input is ready for the keyboard
* and conveniently hides the problem. XXX
*/
/*
* Try removing anything stuck in the keyboard controller; whether
* it's a keyboard scan code or mouse data. `scintr()' doesn't
* read the mouse data directly, but `kbdio' routines will, as a
* side effect.
*/
s = spltty();
kbd = (keyboard_t *)arg;
if (kbdd_lock(kbd, TRUE)) {
/*
* We have seen the lock flag is not set. Let's reset
* the flag early, otherwise the LED update routine fails
* which may want the lock during the interrupt routine.
*/
kbdd_lock(kbd, FALSE);
if (kbdd_check_char(kbd))
kbdd_intr(kbd, NULL);
}
splx(s);
timeout(pckbd_timeout, arg, hz/10);
}
static void
atkbd_timeout(void *arg)
{
atkbd_state_t *state;
keyboard_t *kbd;
int s;
/*
* The original text of the following comments are extracted
* from syscons.c (1.287)
*
* With release 2.1 of the Xaccel server, the keyboard is left
* hanging pretty often. Apparently an interrupt from the
* keyboard is lost, and I don't know why (yet).
* This ugly hack calls the low-level interrupt routine if input
* is ready for the keyboard and conveniently hides the problem. XXX
*
* Try removing anything stuck in the keyboard controller; whether
* it's a keyboard scan code or mouse data. The low-level
* interrupt routine doesn't read the mouse data directly,
* but the keyboard controller driver will, as a side effect.
*/
/*
* And here is bde's original comment about this:
*
* This is necessary to handle edge triggered interrupts - if we
* returned when our IRQ is high due to unserviced input, then there
* would be no more keyboard IRQs until the keyboard is reset by
* external powers.
*
* The keyboard apparently unwedges the irq in most cases.
*/
s = spltty();
kbd = (keyboard_t *)arg;
if (kbdd_lock(kbd, TRUE)) {
/*
* We have seen the lock flag is not set. Let's reset
* the flag early, otherwise the LED update routine fails
* which may want the lock during the interrupt routine.
*/
kbdd_lock(kbd, FALSE);
if (kbdd_check_char(kbd))
kbdd_intr(kbd, NULL);
}
splx(s);
state = (atkbd_state_t *)kbd->kb_data;
callout_reset(&state->ks_timer, hz / 10, atkbd_timeout, arg);
}
