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Date: Thu, 2 Jun 2005 15:00:27 -0700 (PDT)
From: trusted linux <tcimpl2005@yahoo.com>
Subject: Re: TPM on IBM thinkcenter S51
To: Torsten Landschoff <tla@comsys.informatik.uni-kiel.de>
Cc: linux-kernel@vger.kernel.org
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Torsten,

thanks, here is my strace related to tpm:

open("/dev/tpm", O_RDWR)                = -1 ENODEV
(No such device)
write(2, "Can\'t open TPM Driver\n", 22Can't open TPM
Driver
) = 22

I also inserted some printk in tpm.c and tpm_nsc.c
(tpm_atmel.c as well). I only saw "init_tpm" be
called.  "tpm_open" was not even called!

This machine (IBM thinkcenter S51) has a TPM
(confirmed by IBM support and its own specs). So, the
only possible problem is the driver. Any idea?

thanks a lot,

Gang



--- Torsten Landschoff
<tla@comsys.informatik.uni-kiel.de> wrote:

> On Fri, 2005-05-27 at 13:42 -0700, trusted linux
> wrote:
>  
> > I can't make TPM work on an IBM thinkcenter S51
> > running 2.6.12-rc5 kernel. Here is what I did:
> >  
> > 1. build the drivers tpm.ko and tpm_nsc.ko and
> > modprobe tpm
> > 2. create /dev/tpm
> > 3. build tpm libtcpa (version 1.1)
> > 4. run tcpa_demo 
> >  
> > then I got an error "Can't open TPM driver". 
> 
> I'd check with strace first what's going on there.
> In my case I
> had /dev/tpm0 created by udev with libtcpa accessing
> /dev/tpm. So -
> what's the output of 
> 
> 	strace ./tcpa_demo
> 
> ??
> 
> Greetings
> 
> 	Torsten
> 
> 



		
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