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Subject[patch] Ignore bad result of i8042 AUX test - happens on Dell machines
Hi!

You can import this changeset into BK by piping this whole message to:
'| bk receive [path to repository]' or apply the patch as usual.
'bk pull bk://linux-input.bkbits.net/linux-input' should work as well.

===================================================================

ChangeSet@1.543, 2002-08-30 11:22:23+02:00, vojtech@suse.cz
Ignore error 0xff - 'general error' in AUX wire test in i8042.c,
some mainboards (Andrew Morton's Dell) report that even when everything
is okay with AUX. Also remove a check for very old AMI i8042's, which
could generate false positives on modern buggy mainboards.


i8042.c | 17 ++++-------------
1 files changed, 4 insertions(+), 13 deletions(-)

===================================================================

diff -Nru a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c
--- a/drivers/input/serio/i8042.c Fri Aug 30 11:25:07 2002
+++ b/drivers/input/serio/i8042.c Fri Aug 30 11:25:07 2002
@@ -576,9 +576,12 @@

/*
* External connection test - filters out AT-soldered PS/2 i8042's
+ * 0x00 - no error, 0x01-0x03 - clock/data stuck, 0xff - general error
+ * We ignore general error, since some chips report it even under normal
+ * operation.
*/

- if (i8042_command(&param, I8042_CMD_AUX_TEST) || param)
+ if (i8042_command(&param, I8042_CMD_AUX_TEST) || (param && param != 0xff))
return -1;

/*
@@ -587,23 +590,11 @@

if (i8042_command(&param, I8042_CMD_AUX_DISABLE))
return -1;
-
if (i8042_command(&param, I8042_CMD_CTL_RCTR) || (~param & I8042_CTR_AUXDIS))
return -1;

- if (i8042_command(&param, I8042_CMD_AUX_TEST) || param) {
-
-/*
- * We've got an old AMI i8042 with 'Bad Cache' commands.
- */
-
- i8042_command(&param, I8042_CMD_AUX_ENABLE);
- return -1;
- }
-
if (i8042_command(&param, I8042_CMD_AUX_ENABLE))
return -1;
-
if (i8042_command(&param, I8042_CMD_CTL_RCTR) || (param & I8042_CTR_AUXDIS))
return -1;

===================================================================
This BitKeeper patch contains the following changesets:
+
## Wrapped with gzip_uu ##


begin 664 bkpatch20470
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M`OV?'Q9=^N?GB)RA5=M;"HR2U81.</CT^NHD\G6U$.ET@EH(\B]2^K^_*P<`
!````
`
end
--
Vojtech Pavlik
SuSE Labs
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