Date: Thu, 19 Nov 1998 17:31:54 -0600 From: David Kelly <dkelly@hiwaay.net> To: pgl@ti.cz Cc: freebsd-questions@FreeBSD.ORG Subject: Re: pcm0 Message-ID: <199811192331.RAA05603@n4hhe.ampr.org> In-Reply-To: Message from pgl@moo.terminal.cz of "Thu, 19 Nov 1998 10:08:29 GMT." <19981119100829.517.qmail@moo.terminal.cz>
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pgl@moo.terminal.cz writes:
> I'm still baffled as to how I can use the pnp0 controller in conjuction with
> the pcm0 driver (or any driver?), as when the kernel says "pcm0 not configure
> d,
> perhaps you want pcm1?", I don't know how to get the audio player (amp, xanim
> ,
> etc etc) to -use- pcm1 instead of pcm0. I don't know much about the
> device nodes etc.
n4hhe: {1055} cd /dev
n4hhe: {1056} ls -l audio*
lrwxrwxrwx 1 root wheel 6 Nov 11 17:48 audio@ -> audio1
crw-rw-rw- 1 root wheel 30, 4 Nov 11 17:15 audio0
crw-rw-rw- 1 root wheel 30, 20 Nov 16 12:43 audio1
n4hhe: {1057}
See how /dev/audio is symbolically linked to /dev/audio1 on my system?
Same kind of thing you are seeing as the pcm0 device is hard coded in
the kernel. You have to list pcm0 in the config to get its code compiled
in. But then with pnp code also in your kernel the pnp code detects your
audio card before the kernel probes pcm0, then pnp creates a pcm1. When
it comes down to pcm0 the probe is skipped because it quickly notices a
hardware conflict with an already detected device (which just so happens
to also be the same sound card).
/dev/MAKEDEV has changed a bit between 2.2.6, 2.2.7, and 3.0. This is
how it behaves in 3.0:
n4hhe: [1001] cd /dev
n4hhe: [1002] ./MAKEDEV snd0
n4hhe: [1003] ls -l audio*
lrwxrwxrwx 1 root wheel 6 Nov 19 17:27 audio@ -> audio0
crw-rw-rw- 1 root wheel 30, 4 Nov 19 17:27 audio0
crw-rw-rw- 1 root wheel 30, 20 Nov 16 12:43 audio1
n4hhe: [1004] ./MAKEDEV snd1
n4hhe: [1005] ls -l audio*
lrwxrwxrwx 1 root wheel 6 Nov 19 17:28 audio@ -> audio1
crw-rw-rw- 1 root wheel 30, 4 Nov 19 17:27 audio0
crw-rw-rw- 1 root wheel 30, 20 Nov 19 17:28 audio1
n4hhe: [1006]
Notice how the /dev/audio link moves. Other sound devices are similarly
relinked.
--
David Kelly N4HHE, dkelly@nospam.hiwaay.net
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