From owner-freebsd-isdn  Fri Apr  3 00:32:47 1998
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From: Wolfgang Helbig <helbig@Informatik.BA-Stuttgart.DE>
Message-Id: <199804030832.KAA22488@rvc1.informatik.ba-stuttgart.de>
Subject: Re: i4b-L1-F_ill:What is this?
In-Reply-To: <m0yKgmz-0000ayC@hcswork.hcs.de> from Hellmuth Michaelis at "Apr 2, 98 12:00:05 pm"
To: hm@hcs.de
Date: Fri, 3 Apr 1998 10:32:50 +0200 (MET DST)
Cc: freebsd-isdn@FreeBSD.ORG
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> The only questions arising from this are:
> 
> 	- should the ISAC irqs be enabled later when the whole machine is
> 	  up, and how can the state "the machine is up and ready to serve
> 	  irq's" be detected by a driver for all *BSD's ?
> 
> 	- although Q.921 doesn't require this, shall a TEI request procedure
> 	  be initiated on arrival of a TEI check request with a group TEI 
> 	  and no local TEI assigned yet ?
> 
> Comments ?

Here we go:
At boottime neither ISAC nor HSCX IRQ's should be enabled. This might
even fix the SMP-problem.

Enabling of the IRQ's and initialization of layer1 *and* layer2 should
be triggered by isdnd when it is started.

If layer1 is activated but not layer2, my NT is constantly trying
to deactivate layer1 until we have a TEI.
So I suggest to initialize layer2 right after layer1 is up.

Wolfgang

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