freebsd-skq/sys/dev/pci/eisa_pci.c
Marcel Moolenaar b7cbd25b77 Revert previous change. The magical constants can't be changed
(easily) without having to go to other drivers to change the
magical return values. This wouldn't be so bad if there were
proper defines for these constants.

In particular dev/acpica/acpi_pcib_pci.c returns -1000 as the
probe priority and it's expected that this driver gets to
attach over the common PCI bus drivers.
2015-06-06 17:04:36 +00:00

128 lines
3.8 KiB
C

/*-
* Copyright (c) 1994,1995 Stefan Esser, Wolfgang StanglMeier
* Copyright (c) 2000 Michael Smith <msmith@freebsd.org>
* Copyright (c) 2000 BSDi
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* PCI:EISA bridge support
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
static int eisab_probe(device_t dev);
static int eisab_attach(device_t dev);
static device_method_t eisab_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, eisab_probe),
DEVMETHOD(device_attach, eisab_attach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* Bus interface */
DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
DEVMETHOD(bus_release_resource, bus_generic_release_resource),
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
DEVMETHOD_END
};
static driver_t eisab_driver = {
"eisab",
eisab_methods,
0,
};
static devclass_t eisab_devclass;
DRIVER_MODULE(eisab, pci, eisab_driver, eisab_devclass, 0, 0);
static int
eisab_probe(device_t dev)
{
int matched = 0;
/*
* Generic match by class/subclass.
*/
if ((pci_get_class(dev) == PCIC_BRIDGE) &&
(pci_get_subclass(dev) == PCIS_BRIDGE_EISA))
matched = 1;
/*
* Some bridges don't correctly report their class.
*/
switch (pci_get_devid(dev)) {
case 0x04828086: /* may show up as PCI-HOST or 0:0 */
matched = 1;
break;
default:
break;
}
if (matched) {
device_set_desc(dev, "PCI-EISA bridge");
return(-10000);
}
return(ENXIO);
}
static int
eisab_attach(device_t dev)
{
/*
* Attach an EISA bus. Note that we can only have one EISA bus.
*/
if (!devclass_get_device(devclass_find("eisa"), 0))
device_add_child(dev, "eisa", -1);
/*
* Attach an ISA bus as well, since the EISA bus may have ISA
* cards installed, and we may have no EISA support in the system.
*/
if (!devclass_get_device(devclass_find("isa"), 0))
device_add_child(dev, "isa", -1);
bus_generic_attach(dev);
return(0);
}