Re: [linux-dvb] device file ordering w/multiple cards

[e9hack <e9hack@googlemail.com>]

Joseph Shraibman schrieb:
> I have two dvb cards in my system.  Is there any way to change the order 
> of the device files?

Usually, the device files (/dev/dvb/adapter?/..) are create by a udev-rule. If you modify
the rule, you can assign every dvb card to a specific number. In my case, I'm using Suse,
which comes withe following udev rule in /etc/udev/rules.d/50-udev-default.rules:
# DVB video
SUBSYSTEM=="dvb", PROGRAM="/bin/sh -c 'K=%k; K=$${K#dvb}; printf dvb/adapter%%i/%%s
$${K%%%%.*} $${K#*.}'", NAME="%c"

I've two DVB cards, one FF and one budget. The FF should be always the adapter #0. I've
disabled the default DVB rule and add my one rule, which assigns the numbers depend on the
 pci vendor/device numbers:
# DVB video
#SUBSYSTEM=="dvb", PROGRAM="/bin/sh -c 'K=%k; K=$${K#dvb}; printf dvb/adapter%%i/%%s
$${K%%%%.*} $${K#*.}'", NAME="%c"
SUBSYSTEM=="dvb", SYSFS{subsystem_device}=="0x1156", SYSFS{subsystem_vendor}=="0x153b",
PROGRAM="/bin/sh -c 'K=%k; K=$${K#dvb}; printf dvb/adapter%%i/%%s 1 $${K#*.}'", NAME="%c
SUBSYSTEM=="dvb", SYSFS{subsystem_device}=="0x000a", SYSFS{subsystem_vendor}=="0x13c2",
PROGRAM="/bin/sh -c 'K=%k; K=$${K#dvb}; printf dvb/adapter%%i/%%s 0 $${K#*.}'", NAME="%c

If you use two identical cards, you can use the pci slot number:
# DVB video
#SUBSYSTEM=="dvb", PROGRAM="/bin/sh -c 'K=%k; K=$${K#dvb}; printf dvb/adapter%%i/%%s
$${K%%%%.*} $${K#*.}'", NAME="%c"
SUBSYSTEM=="dvb", SUBSYSTEMS=="pci", KERNELS=="0000:04:07.0", PROGRAM="/bin/sh -c 'K=%k;
K=$${K#dvb}; printf dvb/adapter%%i/%%s 1 $${K#*.}'", NAME="%c"
SUBSYSTEM=="dvb", SUBSYSTEMS=="pci", KERNELS=="0000:04:06.0", PROGRAM="/bin/sh -c 'K=%k;
K=$${K#dvb}; printf dvb/adapter%%i/%%s 0 $${K#*.}'", NAME="%c"

Regards,
Hartmut