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Fix for the Compaq Armada laptop.

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The PS/2 mouse device responds to a reset command with a sequence of
ACK(fa), RESULT(aa) and ID(00).  Most PS/2 mice immediately returns
ACK, but spend sometime before sending RESULT. The Armada takes time
before ACK; extra delay is necessary before the call to read ACK.

The problem was reported in comp.unix.bsd.freebsd.misc and the patch
was tested by the reporter. No PR was filed, by the way.
This commit is contained in:
Kazutaka YOKOTA 1997-02-07 11:41:45 +00:00
parent e56644ad0e
commit 445605a6e0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=22399
2 changed files with 18 additions and 6 deletions
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12
sys/i386/isa/kbdio.c
View File

@ -878,7 +878,13 @@ reset_aux_dev(KBDC p)
if (!write_aux_command(p, PSMC_RESET_DEV))
continue;
emptyq(&kbdcp(p)->aux);
c = read_aux_data(p);
/* 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, "kbdio: RESET_AUX return code:%04x\n", c);
if (c == PSM_ACK) /* aux dev is about to reset... */
@ -887,10 +893,10 @@ reset_aux_dev(KBDC p)
if (retry < 0)
return FALSE;
while (again-- > 0) {
for (again = KBD_MAXWAIT; again > 0; --again) {
/* wait awhile, well, quite looooooooooooong */
DELAY(KBD_RESETDELAY*1000);
c = read_aux_data(p); /* RESET_DONE/RESET_FAIL */
c = read_aux_data_no_wait(p); /* RESET_DONE/RESET_FAIL */
if (c != -1) /* wait again if the controller is not ready */
break;
}

12
sys/isa/kbdio.c
View File

@ -878,7 +878,13 @@ reset_aux_dev(KBDC p)
if (!write_aux_command(p, PSMC_RESET_DEV))
continue;
emptyq(&kbdcp(p)->aux);
c = read_aux_data(p);
/* 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, "kbdio: RESET_AUX return code:%04x\n", c);
if (c == PSM_ACK) /* aux dev is about to reset... */
@ -887,10 +893,10 @@ reset_aux_dev(KBDC p)
if (retry < 0)
return FALSE;
while (again-- > 0) {
for (again = KBD_MAXWAIT; again > 0; --again) {
/* wait awhile, well, quite looooooooooooong */
DELAY(KBD_RESETDELAY*1000);
c = read_aux_data(p); /* RESET_DONE/RESET_FAIL */
c = read_aux_data_no_wait(p); /* RESET_DONE/RESET_FAIL */
if (c != -1) /* wait again if the controller is not ready */
break;
}