Re: [v4l/dvb] identification/ fixed registration order of DVB cards

Re: [v4l/dvb] identification/ fixed registration order of DVB cards

[Matthias Weber]

>Can't this be forced using udev rules?

udev seems to be a good way. I tried several different configurations.. my last one (file called '50-dvb_cards.rules'):

# Create a symlink /dev/dvb/adapter104 pointing to dvb card with PCI bus id 04:00.0
SUBSYSTEM=="dvb", KERNEL=="0000:04:00.0", PROGRAM="/bin/sh -c 'K=%k; K=$${K#dvb}; printf dvb/adapter104/%%s $${K#*.}'", SYMLINK+="%c"

# Create a symlink /dev/dvb/adapter106 pointing to dvb card with PCI bus id 04:02.0
SUBSYSTEM=="dvb", KERNEL=="0000:04:02.0", PROGRAM="/bin/sh -c 'K=%k; K=$${K#dvb}; printf dvb/adapter106/%%s $${K#*.}'", SYMLINK+="%c"

BUS and ID combinations I saw on different other webpages seem to be out of date. Not sure what I am doing wrong as there still is only /dev/dvb/adapter0 and /dev/dvb/adapter1.

I also tried to get my usbstick running with
BUS=="usb", SYSFS{idVendor}=="058f", SYMLINK=+"usbstick"
but this didn't work also.

Any help appreciated. Thanks!

Cheers
Matthias
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Re: [v4l/dvb] identification/ fixed registration order of DVB cards

[Matthias Weber]

Ok, this was a typo.

# Create a symlink /dev/dvb/adapter100 pointing to dvb card with PCI bus id 04:00.0
SUBSYSTEM=="dvb", KERNEL=="0000:04:00.0", PROGRAM="/bin/sh -c 'K=%k; K=$${K#dvb}; printf dvb/adapter100/%%s $${K#*.}'", SYMLINK+="%c"

It works for creating a SYMLINK, so adapter0 and adapter1 still exist. Is there a way for "replacing"? Sorry, I am not very familiar with linux yet.

Cheers
-- 
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[v4l/dvb] identification/ fixed registration order of DVB cards

[Matthias Weber]

Hello,

we are using two identical DVB cards (TT-budget S2-1600) in one system.

How can we assure that the same card always are assigned to the same device file /dev/dvb/adapter0 (/dev/dvb/adapter1 

respectively). 

Short example:
Is the card in the first PCI slot always /dev/dvb/adapter0
and the card in the second PCI slot always /dev/dvb/adapter1?

Is this (registration order or whatever it may be called) done in some drivers?
Or is it pure luck when booting the system?

If not implemented, what can be done to tell our own software to switch frontend handles or not to?

There might be a way through MAC addresses...
In ttpci-eeprom.c is a function called ttpci_eeprom_parse_mac()
which is used in budget_core.c ttpci_budget_init() function.
Can this somehow combined with PCI?

Any ideas what would be a smart and easy way?
Thanks!

Cheers
Matthias
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Re: [v4l/dvb] identification/ fixed registration order of DVB cards

[VDR User]

Can't this be forced using udev rules?