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To: Mike Smith <msmith@FreeBSD.org>
Cc: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: Re: cvs commit: src/sys/dev/musycc musycc.c 
In-reply-to: Your message of "Sun, 11 Jun 2000 13:43:28 PDT."
             <200006112043.NAA15090@mass.cdrom.com> 
Date: Mon, 12 Jun 2000 00:01:19 +0200
Message-ID: <2477.960760879@critter.freebsd.dk>
From: Poul-Henning Kamp <phk@critter.freebsd.dk>
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In message <200006112043.NAA15090@mass.cdrom.com>, Mike Smith writes:
>> phk         2000/06/11 12:09:48 PDT
>> 
>>   Added files:
>>     sys/dev/musycc       musycc.c 
>>   Log:
>>   The very feeble beginnings of a driver for the LanMedia LMC1504 card.
>>   
>>   New-Bus wizards are encouraged to look at this, I think it poses a
>>   challenge for the current newbus design.
>
>Can you be a little more explicit about the nature of the problem?  It 
>looks pretty straightforward from here...
>
>Making some assumptions - function 0 and function 1 both describe 
>resources that a single driver instance requires in order to operate 
>correctly.

Right with the added twist that identification doesn't complete
until I have had a chance to poke at function 1.  In other words,
I can't really claim function 0 when I see it, because I don't
know if it is part of the card I'm looking for or another card
and I will not know until I get to probe function 1.

The card looks like this:


              ############### func0
              #               /    \
              #              /       \
              #             |         \
	PCI ==#             |          |
              #          Framer0  Framer1  [...]
              #             |          |
              #             |          |
              ### func1 ======= "ebus"=======-- ID-prom


Your suggestions all sound like equally hackish ways to do it as what
I have done in my code, and maybe we don't want to support this kind
of hardware in any more respectable way than with some kind of hack ?

For another problem of this class, look at the Znyx314 detection
in if_de

--
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD coreteam member | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.


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