Problem udev and DVB

Problem udev and DVB

[Falk Müller]

Hello !

How can I arrange that udev (kernel 2.6.16 or 2.6.17, both with the same 
problem) creates /dev/dvb/AdapterX instead (or 
plus) /dev/.static/dev/dvb/AdapterX ?

Until now every try to do manually failed :-( Thanks a lot, Falk

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Re: Problem udev and DVB

[Andreas Jellinghaus]

what kind of device is that? a pci card? will you find the
device in the /sys/ tree? and does it have a "dev" file at
some node?

once you found it, udevinfo can be used to get information about it,
which can be used for writing rules. for example
udevinfo -a -p /sys/devices/pci0000:00/0000:00:1d.0/usb1/usbdev1.1_ep00/dev
(all in one line) shows me the properties of my usb host controller.

google for "writing udev rules", a HOWTO document with good explanations
how it is done.

good luck!

Andreas

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Re: Problem udev and DVB

[Marco d'Itri]

On Dec 06, Falk Müller <Partyman79@gmx.de> wrote:

> How can I arrange that udev (kernel 2.6.16 or 2.6.17, both with the same 
> problem) creates /dev/dvb/AdapterX instead (or 
Build the driver as a module, it's broken.

-- 
ciao,
Marco

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Re: Problem udev and DVB

[Falk Müller]

Ahm yes, how do I do this ? Sorry, never done something like this before ...

Falk


> Build the driver as a module
>-- 
>ciao,
>Marco

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Re: Problem udev and DVB

[Falk Müller]

> what kind of device is that? a pci card? will you find the
> device in the /sys/ tree? and does it have a "dev" file at
> some node?

It is a usb stick. I searched myself and additionally let search for "*dvb*" 
and "*em*" (name of the driver) without success. The usb ports themself and 
i.e. the soundcard I can see.

The only thing I found was /sys/bus/usb/drivers/em28xx "em28xx" is the name of 
the driver for the dvb-t usb stick

So I guess I have to get the usb stick listed somewhere in /sys/devices ? And 
how ?

Falk

> once you found it, udevinfo can be used to get information about it,
> which can be used for writing rules. for example
> udevinfo -a -p /sys/devices/pci0000:00/0000:00:1d.0/usb1/usbdev1.1_ep00/dev
> (all in one line) shows me the properties of my usb host controller.
>
> google for "writing udev rules", a HOWTO document with good explanations
> how it is done.
>
> good luck!
>
> Andreas

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Re: Problem udev and DVB

[Dan Nicholson]

On 12/6/06, Falk Müller <Partyman79@gmx.de> wrote:
> > what kind of device is that? a pci card? will you find the
> > device in the /sys/ tree? and does it have a "dev" file at
> > some node?
>
> It is a usb stick. I searched myself and additionally let search for "*dvb*"
> and "*em*" (name of the driver) without success. The usb ports themself and
> i.e. the soundcard I can see.
>
> The only thing I found was /sys/bus/usb/drivers/em28xx "em28xx" is the name of
> the driver for the dvb-t usb stick

I'm not the expert here, but I think there should be a symlink in that
directory to any devices using that driver. For instance, I have a USB
printer.

$ ls /sys/bus/usb/drivers/usblp/
2-3:1.0  bind  module  new_id  unbind
$ ls -l /sys/bus/usb/drivers/usblp/2-3\:1.0
lrwxrwxrwx 1 root root 0 2006-12-06 10:08
/sys/bus/usb/drivers/usblp/2-3:1.0 ->
../../../../devices/pci0000:00/0000:00:0e.0/usb2/2-3/2-3:1.0
$ udevinfo -a -p /devices/pci0000:00/0000:00:0e.0/usb2/2-3/2-3:1.0 |
grep product
    SYSFS{product}="DeskJet 810C"
    SYSFS{product}="OHCI Host Controller"

If you look at all the output from udevinfo, the "DesktJet 810C"
actually comes from the parent device, but this is enough information
to write the following rule:

BUS="usb", SYSFS{product}="DeskJet 810C", SYMLINK+="printer/deskjet810c"

I think with udev >= 098, the syntax should be

SUBSYSTEMS="usb", ATTRS{product}="DeskJet 810C",
SYMLINK+="printer/deskjet810c"

I'm probably wrong on the new syntax, though, but the old one will still work.

--
Dan

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Re: Problem udev and DVB

[Alex Merry]

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On Wednesday 06 December 2006 13:44, Falk Müller wrote:
> Ahm yes, how do I do this ? Sorry, never done something like this
> before ...

You need to build your own kernel, and build the driver for your device 
as a module.  A google search should give you loads of documents 
telling you how to do this.

Alex :-)

>
> Falk
>
> > Build the driver as a module
> >--
> >ciao,
> >Marco
>
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-- 
Pippin
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0870 120 0870, ext 26669

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