IRDA/IRCOMM on a TiBook patch
Till.Straumann at TU-Berlin.de
Fri Oct 19 16:37:32 EST 2001
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 :-)
> > 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).
> Earthling Michel Dänzer (MrCooper)/ Debian GNU/Linux (powerpc) developer
> XFree86 and DRI project member / CS student, Free Software enthusiast
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