[linux-audio-user] Probing modules

[Rusty Phillips]

Vendor IDs can be found under the /proc/pci.  Most modules do actually
give the option of loading with a certain vendor id if they support more
than one chipset.

A more reliable thing you can do is check to see which card was loaded
by comparing /proc/pci with /proc/asound/cards, both of which list
unique characteristics that can be used to determine if a card was
loaded (or if more than one was loaded, etc).  Just to be
clear, /proc/pci lists everything on your PCI bus.  /proc/asound/cards
lists all cards for which you have loaded modules.

This technique could easily generalize to also checking other buses,
such as USB, firewire, or CardBus.  

I wonder if any of the hardware detection systems use this approach
(looking through proc to see what turned up)?


On Sun, 2005-01-16 at 01:24 +0100, Christoph Eckert wrote:
> Hi,
> 
> 
> just for fun and for learning the system, I wanted to write a 
> small script which automatically configures any soundcards 
> (similar to alsaconf).
> 
> Based on PCI, I wanted to get all vendor and card IDs and 
> modprobe each ALSA module to each card found and check the 
> result.
> 
> Unfortunately, this doesn't seem to be that easy. Could anyone 
> confirm, that I cannot load a module to a certain PCI card?
> 
> Furthermore, modprobe does not give any error when probing a 
> module for a card I do not have.
> 
> And I found no way to get backwards the card ID for a loaded 
> module :( .
> 
> Does anyone know a way how I can find out which cards are in 
> the system and which module fits to it?
> 
> 
> Any wee small hint is very welcome.
> 
> 
> 
>  Best regards
> 
> 
>     ce
> 
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