Date: Sun, 6 Apr 2003 12:41:34 -0400 From: Mathew Kanner <mat@cnd.mcgill.ca> To: freebsd-current@freebsd.org Subject: Re: midi problem, an isa device on a pci card Message-ID: <20030406164134.GN17533@cnd.mcgill.ca> In-Reply-To: <20030404182557.GK17533@cnd.mcgill.ca> References: <20030404182557.GK17533@cnd.mcgill.ca>
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Hello,
I've recived no responses. Anyway, the following includes my
own solution to the question, lots of trial and error. I've found that
isahints was the closest exsting code to what I wanted.
As always, I would love to hear any comments.
> How do I create isa devices from a pci device. Do I search up the
> soundcard tree for the pci bus then search down for the isa bus, then
> create_child(..."mpushim")?
In pci device_attach:
isa=devclass_find("isa");
if( !isa ) {
device_printf(sc->dev,"cmi midi error no devclass for isa\n");
goto err;
}
if (devclass_get_devices(isa, &isalistp, &isacountp) != 0 ) {
device_printf(sc->dev,"cmi midi error fetching isa devices\n");
goto err;
}
if ( isacountp < 1 ) {
device_printf(sc->dev,"cmi midi no isa busses found\n");
goto err;
}
/*
* Be stupid and just pick the first isa bus
*/
sc->isadev = isalistp[0];
mpuisa=devclass_find("mpuisa");
if( !mpuisa ) {
device_printf(sc->dev,"cmi: midi driver not found\n");
goto err;
}
i = devclass_find_free_unit(mpuisa,0);
sc->mpudev = BUS_ADD_CHILD(sc->isadev, 1, "mpuisa", i);
[Needs to be done with BUS_ADD_CHILD, I tried with others, m' yo
they just don't work]
> How do I tell the shim before the probe/attach what io region to look
> at, do I fiddle with ivars (or some internal structure), do I mess with hints
> via kenv(9) [Is there a kenv(9)? ]
[ Say, p->port=0x300, then following would set it to 0x300-0x302
and the same IRQ as the pci device ]
bus_set_resource(sc->mpudev, SYS_RES_IOPORT, 0, p->port, 2);
bus_set_resource(sc->mpudev, SYS_RES_IRQ, 0, rman_get_start(sc->irq), 1);
if( device_probe_and_attach(sc->mpudev) == 0 ) {
device_printf(sc->dev,"added %s/%s\n",
device_get_nameunit(sc->isadev),
device_get_nameunit(sc->mpudev) );
return ;
}
Cheers,
--Mat
--
Brain: Are you pondering what I'm pondering?
Pinky: I think so Brain, but the Rockettes, it's mostly girls, isn't it?
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