Date: Fri, 14 Aug 1998 08:41:55 +0200 (CEST) From: hm@kts.org (Hellmuth Michaelis) To: tlambert@primenet.com (Terry Lambert) Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: developing device drivers Message-ID: <m0z7DYh-00000hC@bert.kts.org> In-Reply-To: <199808132017.NAA14261@usr09.primenet.com> from Terry Lambert at "Aug 13, 98 08:17:13 pm"
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Terry Lambert wrote:
> > I'd really like to write drivers (for ISA cards) as LKM modules, but so
> > far i don't know how to assign 1) the IRQ, 2) the iobase and 3) the membase
> > ( and perhaps flags and spl) to the LKM at module load time.
> >
> > Did i miss something ?
>
> You probe and attach at load time, normally. This means you detect the
> IRQ/DRQ/IOBase/MemBase/Etc., not assign it.
I don't quite understand, sorry.
Given an ISA card, supporting IRQ's 3..15, i/o 0x100...0x300 and mem 0xa0000
...0dffff.
What i was looking for in the first place was something like
modload -I <irq> -O <iobase> -M <membase> ....
to specify the same parameters i'd have to specify in the kernel config file.
When i probe at load time, i try to detect the card in question, but where
shall i start to search without knowing _where_ to search (iobase/membase)
(other than searching through the whole supported iobase/membase) ?
Given i found the card to be the one i looked for, which of the IRQ/iobase/mem
supports shall i use in the attach ? How is the user to be able to specify the
parameters he prefers ?
hellmuth
--
Hellmuth Michaelis hm@kts.org Hamburg, Europe
A duck is like a bicycle because they both have two wheels except the duck
(terry@cs.weber.edu)
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