Date: Mon, 03 Apr 1995 12:28:31 +0200 From: Gert-Jan.Vons@ocegr.fr To: bugs@FreeBSD.org Subject: psm driver probe fails on ThinkPad 340 Message-ID: <9504031028.AA22422@ocegr.fr>
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To: FreeBSD-gnats-submit@freebsd.org
Subject:
From: vons
Reply-To: vons
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>Submitter-Id: current-users
>Originator: Gert-Jan Vons , Gert-Jan.Vons@ocegr.fr
>Organization: none
>Confidential: no
>Synopsis: psm driver probe fails on ThinkPad 340
>Severity: serious
>Priority: medium
>Category: i386
>Release: FreeBSD 2.1.0-Development i386
>Class: sw-bug
>Environment:
<Relevant environment information (multiple lines)>
Thinkpad 340 with integrated TrackPoint(tm) II, user-doc refers to
it as an ps/2 mouse, irq 12 at 0x60-0x64.
OS version is SNAP-950322, but 2.0R fails too (same psm driver).
Kernel config file section:
device sc0 at isa? port "IO_KBD" tty irq 1 vector scintr
options ALLOW_CONFLICT_IOADDR
device psm0 at isa? port "IO_KBD" tty irq 12 vector psmintr
>Description:
<Precise description of the problem (multiple lines)>
During boot, the psm probe fails to recognise the mouse. The syscons
driver recognises the keyboard at 0x60-0x6f irq 1, but the psm driver
just says "psm0 not found at 0x60".`
The probe function
1 int psmprobe(struct isa_device *dvp)
2 {
3 /* XXX: Needs a real probe routine. */
4
5 int ioport,c,unit;
6
7 ioport=dvp->id_iobase;
8 unit=dvp->id_unit;
9 psm_write_dev(ioport,0xff); /* Reset aux device */
10 psm_poll_status();
11 outb(ioport+CNTRL,0xa9);
12 psm_poll_status();
13 outb(ioport+CNTRL,0xaa);
14 c = inb(ioport+DATA);
15 if(c&0x04) {
16 /* printf("PS/2 AUX mouse is not found\n");*/
17 psm_command(ioport,0x65);
18 psmaddr[unit] = 0; /* Device not found */
19 return(0);}
20 /* printf("PS/2 AUX mouse found. Installing driver\n");*/
21 return (4);
22 }
What happens is that at line 15, c actually has the value 0x55,
which results in a failed probe.
I don't know what the 0xa9 at line 11 is supposed to do, but the 0xaa
at line 13 is the command for a controller selftest (see KBC_SELFTEST
in kbd.h)
In that case, c should indeed be 0x55, since that indicates a
sucessful selftest (KBC_STOK, see kbd.h).
I don't know what this probe-code is trying to do, but the
keyboard/ps2-mouse controller reacts correctly IMHO.
Does this code really work on other systems ?
And is it save to re-probe/re-init the controller when syscons did
the same thing just before ?
>How-To-Repeat:
<Code/input/activities to reproduce the problem (multiple lines)>
Just boot :)
>Fix:
<How to correct or work around the problem, if known (multiple lines)>
A work-around is to just disable lines 15-19 above, the mouse works
fine under XFree.
Gert-Jan
---------------------------------------------------------------------------
J.G. Vons, Oce engineering Creteil, France | E-mail: Gert-Jan.Vons@ocegr.fr
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