Johannes Bauer wrote: > Johannes Bauer schrieb: > >>> Any pointer could help me to add some support about it into >>> scan-win-drivers.pl (I hope that I won't have to mimic the Windows PnP's >>> job in perl ;-) >> OK, I'm fiddling with it right now to build a kind of lsbus - I've not >> read anywhere such a program already exists. > > So, I'm getting somewhere. libpci is pretty neat - however I think the > problem is far too complex to solve it without kernel support: > > What we want is the HDA codec device/vendor ids (struct hda_codec*) > Those are capsuled in HDA busses (struct hda_bus*) > Those busses rely on a pci bus (struct pci_dev*) and provice HDA bus > operations (struct hda_bus_ops*) > > Thsoe hda_bus_ops are the problem: They define the interface how to > speak to a PCI device on the HDA level (send command, wait for > response). The problem is: Access is not uniform. It varies for each and > every device, sometimes even for subtypes. All those are specified in > the patch_*.c files, which are 32 KLOC alone. > > What does this mean? We're screwed, pretty much. Unless the kernel > provides some easy was of accessing the data. Which it does :-) > > I propose this: Import the HDA drivers into the initrd. Then do a scan > of /proc/asound/card[0-9][0-9]? which lists the information we're > looking for nicely: > > Codec: Realtek ALC888 > Address: 0 > Vendor Id: 0x10ec0888 > Subsystem Id: 0x14627519 > Revision Id: 0x100001 > [...]
Thanks for the explanations. So you think we can't easily retrieve informations related to HDaudio bus and its devices without sound card support in the kernel ? For instance, no way to retrieve VendorID and Subsystem Id of HDaudio devices by using some basic C code from userspace via ioctl for instance ? Because I don't know if people from the unattended project will accept to activate sound card support in the linux kernel (or via a module). Anyway, first step is to add HDaudio bus support via /proc/asound/ entries in scan-win-drivers.pl as you suggest. I will try to update my code ASAP. Regards, Pierre PS: you seem so easy with the source of the linux kernel ... I'm jealous, I will ask on next christmas for being "loaded" with such a skill ;-) ------------------------------------------------------------------------------ This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword _______________________________________________ unattended-devel mailing list unattended-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/unattended-devel
