IRDA/IRCOMM on a TiBook patch
michdaen at iiic.ethz.ch
Sat Oct 20 00:10:42 EST 2001
On Fri, 2001-10-19 at 08:37, Till Straumann wrote:
> Michel Dänzer wrote:
> > On Tue, 2001-10-16 at 12:47, Till Straumann wrote:
> > > I (and I believe other people as well) had problems
> > > setting up IRDA/IRCOMM on a TiBook / 2.4.12-benh and
> > > older 2.4 series kernels [on powerpc].
> > >
> > > As far as I could find out there are several problems:
> > >
> > > 1) There seems to be a timing problem when opening
> > > the irda port which prevents it from being properly
> > > initialized.
> > >
> > > When I run "irattach /dev/ttyS1 -s 1", my Nokia 8890
> > > is never discovered. However, when I issue a 'cat /dev/ttyS1',
> > > prior to starting irattach (i.e. by opening the device
> > > [and holding it open until irattach starts]),
> > > things are properly initialized
> > > and discovery works. Putting 'mdelay(100);' somewhere
> > > in macserial.c:rs_open() does the job. However, I have
> > > not yet figured out what exactly causes the problem.
> > > A user space work-around involves patching irattach.c
> > >
> > > 2) There is an endianness bug. A possible solution is attached.
> > Your patch seems to be missing a bit (in qos.c IIRC) though.
> What is it missing? Please, be a little bit more verbose :-)
The same thing you're doing for the other files, i.e. replace param->pv.b
by param->pv.b.ll and param->pv.s by param->pv.s.l . The build fails for
that file otherwise.
I'm talking about net/irda/qos.c BTW.
> > > 3) When applying 1) and 2), IRCOMM works provided that
> > > /proc/sys/net/irda/max_baud_rate is clamped to 57600.
> > > Apparently, there is another problem in 'macserial.c' where speeds
> > > higher than 57600 are treated especially.
> > Have you managed to do anything 'real' yet? I tried your patch, and it
> > does seem to improve things, irdadump seems to show data from my Palm,
> > but I haven't succeeded to synchronize yet.
> Sure - I can open a modem connection to my cellphone and issue any AT
> command I want. However, I have to take care of all of the three issues
> mentioned. (I.e. use patched irattach, use patched kernel and
> echo 57600 > /proc/sys/net/irda/max_baud_rate).
I have done the latter two and used cat to work around the first. I see
something with irdadump but none of the pilot sync tools work. I'm
afraid they're broken on PPC yet. :(
Earthling Michel Dänzer (MrCooper)/ Debian GNU/Linux (powerpc) developer
XFree86 and DRI project member / CS student, Free Software enthusiast
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