Re: Firmware loading problem

From: Marcel Holtmann (
Date: Tue Jul 22 2003 - 10:38:15 EST

Hi Manuel,

> > I installed linux-2.6.0-test1-ac2 and tried to port my driver for the
> > BlueFRITZ! USB Bluetooth dongle to 2.6. This device needs a firmware
> > download and I want to use the new firmware class for getting the
> > firmware file from userspace. After reading the documentation and
> > testing the driver samples I got the results that I expected.
> >
> > My problem is now that the firmware loader is not working with my
> > firmware file and it seems that this is a problem of the file size,
> > because copying small files through the same interface is working fine.
> > This is the file I want to load:
> >
> > -rw-r--r-- 1 holtmann staff 418352 Jul 11 12:38 bfubase.frm
> >
> > I have written my own firmware.agent hotplug script, which looks in
> > general something like this:
> >
> > echo 1 > $LOADING
> > cp bfubase.frm $DATA
> > echo 0 > $LOADING
> >
> > Loading the above firmware file through this interface results in
> > different behaviours. The results are complete freezes, instant reboots,
> > X server crashes with black screens and sometimes I see an oops about
> > virtual memory, but it goes bye bye too fast to let me do anything
> > useful with it.
> Could you send me a tarball with a sample showing the problem. If
> possible I would like to do "make test" and have it compile and crash
> the system appropriately :)

I tracked down the problem to request_firmware() or a sysfs problem.
With the firmware included in a header file the driver itself works

Attached is a sample of how I use the request_firmware() and from the
documentation it seems correct to me.



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This archive was generated by hypermail 2b29 : Wed Jul 23 2003 - 22:00:47 EST