int _remove(PriorityList * plist, Task * task) {
if (!plist->priorities)
return 0;
TPriority * p = _contains(plist->priorities, task->priority);
if (!p)
return 0;
TQueue * q = initializeq();
while (!emptyq(p->tasks)) {
Task * temp = pop(p->tasks);
if (temp != task)
push(q, temp);
}
if (emptyq(q)) {
_removepriority(plist, p);
q = NULL;
}
p->tasks = q;
return 1;
}
/* NOTE: enable the keyboard port but disable the keyboard
* interrupt before calling "reset_kbd()".
*/
int
reset_kbd(KBDC p)
{
int retry = KBD_MAXRETRY;
int again = KBD_MAXWAIT;
int c = KBD_RESEND; /* keep the compiler happy */
while (retry-- > 0) {
empty_both_buffers(p, 10);
if (!write_kbd_command(p, KBDC_RESET_KBD))
continue;
emptyq(&kbdcp(p)->kbd);
c = read_controller_data(p);
if (verbose || bootverbose)
log(LOG_DEBUG, "kbdc: RESET_KBD return code:%04x\n", c);
if (c == KBD_ACK) /* keyboard has agreed to reset itself... */
break;
}
if (retry < 0)
return FALSE;
while (again-- > 0) {
/* wait awhile, well, in fact we must wait quite loooooooooooong */
DELAY(KBD_RESETDELAY*1000);
c = read_controller_data(p); /* RESET_DONE/RESET_FAIL */
if (c != -1) /* wait again if the controller is not ready */
break;
}
if (verbose || bootverbose)
log(LOG_DEBUG, "kbdc: RESET_KBD status:%04x\n", c);
if (c != KBD_RESET_DONE)
return FALSE;
return TRUE;
}
/* send a command and a data to the auxiliary device, wait for ACKs */
int
send_aux_command_and_data(KBDC p, int c, int d)
{
int retry;
int res = -1;
for (retry = KBD_MAXRETRY; retry > 0; --retry) {
if (!write_aux_command(p, c))
continue;
emptyq(&kbdcp(p)->aux);
res = wait_for_aux_ack(kbdcp(p));
if (res == PSM_ACK)
break;
else if (res != PSM_RESEND)
return res;
}
if (retry <= 0)
return res;
for (retry = KBD_MAXRETRY, res = -1; retry > 0; --retry) {
if (!write_aux_command(p, d))
continue;
res = wait_for_aux_ack(kbdcp(p));
if (res != PSM_RESEND)
break;
}
return res;
}
/* send a command to the auxiliary device and wait for ACK */
int
send_aux_command(KBDC p, int c)
{
int retry = KBD_MAXRETRY;
int res = -1;
while (retry-- > 0) {
if (!write_aux_command(p, c))
continue;
/*
* FIXME: XXX
* The aux device may have already sent one or two bytes of
* status data, when a command is received. It will immediately
* stop data transmission, thus, leaving an incomplete data
* packet in our buffer. We have to discard any unprocessed
* data in order to remove such packets. Well, we may remove
* unprocessed, but necessary data byte as well...
*/
emptyq(&kbdcp(p)->aux);
res = wait_for_aux_ack(kbdcp(p));
if (res == PSM_ACK)
break;
}
return res;
}
int
test_aux_port(KBDC p)
{
int retry = KBD_MAXRETRY;
int again = KBD_MAXWAIT;
int c = -1;
while (retry-- > 0) {
empty_both_buffers(p, 10);
if (write_controller_command(p, KBDC_TEST_AUX_PORT))
break;
}
if (retry < 0)
return FALSE;
emptyq(&kbdcp(p)->kbd);
while (again-- > 0) {
c = read_controller_data(p);
if (c != -1) /* try again if the controller is not ready */
break;
}
if (verbose || bootverbose)
log(LOG_DEBUG, "kbdc: TEST_AUX_PORT status:%04x\n", c);
return c;
}
int
test_controller(KBDC p)
{
int retry = KBD_MAXRETRY;
int again = KBD_MAXWAIT;
int c = KBD_DIAG_FAIL;
while (retry-- > 0) {
empty_both_buffers(p, 10);
if (write_controller_command(p, KBDC_DIAGNOSE))
break;
}
if (retry < 0)
return FALSE;
emptyq(&kbdcp(p)->kbd);
while (again-- > 0) {
/* wait awhile */
DELAY(KBD_RESETDELAY*1000);
c = read_controller_data(p); /* DIAG_DONE/DIAG_FAIL */
if (c != -1) /* wait again if the controller is not ready */
break;
}
if (verbose || bootverbose)
log(LOG_DEBUG, "kbdc: DIAGNOSE status:%04x\n", c);
return (c == KBD_DIAG_DONE);
}
/* discard any data from the keyboard or the aux device */
void
empty_both_buffers(KBDC p, int wait)
{
int t;
int f;
int waited = 0;
#if KBDIO_DEBUG >= 2
int c1 = 0;
int c2 = 0;
#endif
int delta = 2;
for (t = wait; t > 0; ) {
if ((f = read_status(kbdcp(p))) & KBDS_ANY_BUFFER_FULL) {
DELAY(KBDD_DELAYTIME);
(void)read_data(kbdcp(p));
#if KBDIO_DEBUG >= 2
if ((f & KBDS_BUFFER_FULL) == KBDS_KBD_BUFFER_FULL)
++c1;
else
++c2;
#endif
t = wait;
} else {
t -= delta;
}
/*
* Some systems (Intel/IBM blades) do not have keyboard devices and
* will thus hang in this procedure. Time out after delta seconds to
* avoid this hang -- the keyboard attach will fail later on.
*/
waited += (delta * 1000);
if (waited == (delta * 1000000))
return;
DELAY(delta*1000);
}
#if KBDIO_DEBUG >= 2
if ((c1 > 0) || (c2 > 0))
log(LOG_DEBUG, "kbdc: %d:%d char read (empty_both_buffers)\n", c1, c2);
#endif
emptyq(&kbdcp(p)->kbd);
emptyq(&kbdcp(p)->aux);
}
Task * toptask(PriorityList * plist) {
if (plist && plist->priorities && !emptyq(plist->priorities->tasks)) {
Task * task = pop(plist->priorities->tasks);
_remove(plist, task);
return task;
}
return NULL;
}
int
get_controller_command_byte(KBDC p)
{
if (kbdcp(p)->command_byte != -1)
return kbdcp(p)->command_byte;
if (!write_controller_command(p, KBDC_GET_COMMAND_BYTE))
return -1;
emptyq(&kbdcp(p)->kbd);
kbdcp(p)->command_byte = read_controller_data(p);
return kbdcp(p)->command_byte;
}
/* NOTE: enable the aux port but disable the aux interrupt
* before calling `reset_aux_dev()'.
*/
int
reset_aux_dev(KBDC p)
{
int retry = KBD_MAXRETRY;
int again = KBD_MAXWAIT;
int c = PSM_RESEND; /* keep the compiler happy */
while (retry-- > 0) {
empty_both_buffers(p, 10);
if (!write_aux_command(p, PSMC_RESET_DEV))
continue;
emptyq(&kbdcp(p)->aux);
/* NOTE: Compaq Armada laptops require extra delay here. XXX */
for (again = KBD_MAXWAIT; again > 0; --again) {
DELAY(KBD_RESETDELAY*1000);
c = read_aux_data_no_wait(p);
if (c != -1)
break;
}
if (verbose || bootverbose)
log(LOG_DEBUG, "kbdc: RESET_AUX return code:%04x\n", c);
if (c == PSM_ACK) /* aux dev is about to reset... */
break;
}
if (retry < 0)
return FALSE;
for (again = KBD_MAXWAIT; again > 0; --again) {
/* wait awhile, well, quite looooooooooooong */
DELAY(KBD_RESETDELAY*1000);
c = read_aux_data_no_wait(p); /* RESET_DONE/RESET_FAIL */
if (c != -1) /* wait again if the controller is not ready */
break;
}
if (verbose || bootverbose)
log(LOG_DEBUG, "kbdc: RESET_AUX status:%04x\n", c);
if (c != PSM_RESET_DONE) /* reset status */
return FALSE;
c = read_aux_data(p); /* device ID */
if (verbose || bootverbose)
log(LOG_DEBUG, "kbdc: RESET_AUX ID:%04x\n", c);
/* NOTE: we could check the device ID now, but leave it later... */
return TRUE;
}
/* discard data from the aux device */
void
empty_aux_buffer(KBDC p, int wait)
{
int t;
int b;
int f;
#if KBDIO_DEBUG >= 2
int c1 = 0;
int c2 = 0;
#endif
int delta = 2;
for (t = wait; t > 0; ) {
if ((f = read_status(kbdcp(p))) & KBDS_ANY_BUFFER_FULL) {
DELAY(KBDD_DELAYTIME);
b = read_data(kbdcp(p));
if ((f & KBDS_BUFFER_FULL) == KBDS_KBD_BUFFER_FULL) {
addq(&kbdcp(p)->kbd, b);
#if KBDIO_DEBUG >= 2
++c1;
} else {
++c2;
#endif
}
t = wait;
} else {
t -= delta;
}
DELAY(delta*1000);
}
#if KBDIO_DEBUG >= 2
if ((c1 > 0) || (c2 > 0))
log(LOG_DEBUG, "kbdc: %d:%d char read (empty_aux_buffer)\n", c1, c2);
#endif
emptyq(&kbdcp(p)->aux);
}
