b7cbd25b77
(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.
246 lines
7.4 KiB
C
246 lines
7.4 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:ISA bridge support
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/module.h>
|
|
#include <sys/bus.h>
|
|
|
|
#include <isa/isavar.h>
|
|
#include <dev/pci/pcivar.h>
|
|
#include <dev/pci/pcireg.h>
|
|
|
|
#include <machine/bus.h>
|
|
#include <sys/rman.h>
|
|
#include <machine/resource.h>
|
|
|
|
static int isab_pci_probe(device_t dev);
|
|
static int isab_pci_attach(device_t dev);
|
|
static struct resource * isab_pci_alloc_resource(device_t dev,
|
|
device_t child, int type, int *rid, u_long start, u_long end, u_long count,
|
|
u_int flags);
|
|
static int isab_pci_release_resource(device_t dev, device_t child,
|
|
int type, int rid, struct resource *r);
|
|
|
|
static device_method_t isab_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, isab_pci_probe),
|
|
DEVMETHOD(device_attach, isab_pci_attach),
|
|
DEVMETHOD(device_detach, bus_generic_detach),
|
|
DEVMETHOD(device_shutdown, bus_generic_shutdown),
|
|
DEVMETHOD(device_suspend, bus_generic_suspend),
|
|
DEVMETHOD(device_resume, bus_generic_resume),
|
|
|
|
/* Bus interface */
|
|
DEVMETHOD(bus_add_child, bus_generic_add_child),
|
|
DEVMETHOD(bus_alloc_resource, isab_pci_alloc_resource),
|
|
DEVMETHOD(bus_release_resource, isab_pci_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
|
|
};
|
|
|
|
struct isab_pci_resource {
|
|
struct resource *ip_res;
|
|
int ip_refs;
|
|
};
|
|
|
|
struct isab_pci_softc {
|
|
struct isab_pci_resource isab_pci_res[PCIR_MAX_BAR_0 + 1];
|
|
};
|
|
|
|
static driver_t isab_driver = {
|
|
"isab",
|
|
isab_methods,
|
|
sizeof(struct isab_pci_softc),
|
|
};
|
|
|
|
DRIVER_MODULE(isab, pci, isab_driver, isab_devclass, 0, 0);
|
|
|
|
/*
|
|
* XXX we need to add a quirk list here for bridges that don't correctly
|
|
* report themselves.
|
|
*/
|
|
static int
|
|
isab_pci_probe(device_t dev)
|
|
{
|
|
int matched = 0;
|
|
|
|
/*
|
|
* Try for a generic match based on class/subclass.
|
|
*/
|
|
if ((pci_get_class(dev) == PCIC_BRIDGE) &&
|
|
(pci_get_subclass(dev) == PCIS_BRIDGE_ISA)) {
|
|
matched = 1;
|
|
} else {
|
|
/*
|
|
* These are devices that we *know* are PCI:ISA bridges.
|
|
* Sometimes, however, they don't report themselves as
|
|
* such. Check in case one of them is pretending to be
|
|
* something else.
|
|
*/
|
|
switch (pci_get_devid(dev)) {
|
|
case 0x04848086: /* Intel 82378ZB/82378IB */
|
|
case 0x122e8086: /* Intel 82371FB */
|
|
case 0x70008086: /* Intel 82371SB */
|
|
case 0x71108086: /* Intel 82371AB */
|
|
case 0x71988086: /* Intel 82443MX */
|
|
case 0x24108086: /* Intel 82801AA (ICH) */
|
|
case 0x24208086: /* Intel 82801AB (ICH0) */
|
|
case 0x24408086: /* Intel 82801AB (ICH2) */
|
|
case 0x00061004: /* VLSI 82C593 */
|
|
case 0x05861106: /* VIA 82C586 */
|
|
case 0x05961106: /* VIA 82C596 */
|
|
case 0x06861106: /* VIA 82C686 */
|
|
case 0x153310b9: /* AcerLabs M1533 */
|
|
case 0x154310b9: /* AcerLabs M1543 */
|
|
case 0x00081039: /* SiS 85c503 */
|
|
case 0x00001078: /* Cyrix Cx5510 */
|
|
case 0x01001078: /* Cyrix Cx5530 */
|
|
case 0xc7001045: /* OPTi 82C700 (FireStar) */
|
|
case 0x00011033: /* NEC 0001 (C-bus) */
|
|
case 0x002c1033: /* NEC 002C (C-bus) */
|
|
case 0x003b1033: /* NEC 003B (C-bus) */
|
|
case 0x886a1060: /* UMC UM8886 ISA */
|
|
case 0x02001166: /* ServerWorks IB6566 PCI */
|
|
if (bootverbose)
|
|
printf("PCI-ISA bridge with incorrect subclass 0x%x\n",
|
|
pci_get_subclass(dev));
|
|
matched = 1;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (matched) {
|
|
device_set_desc(dev, "PCI-ISA bridge");
|
|
return(-10000);
|
|
}
|
|
return(ENXIO);
|
|
}
|
|
|
|
static int
|
|
isab_pci_attach(device_t dev)
|
|
{
|
|
|
|
bus_generic_probe(dev);
|
|
return (isab_attach(dev));
|
|
}
|
|
|
|
static struct resource *
|
|
isab_pci_alloc_resource(device_t dev, device_t child, int type, int *rid,
|
|
u_long start, u_long end, u_long count, u_int flags)
|
|
{
|
|
struct isab_pci_softc *sc;
|
|
int bar;
|
|
|
|
if (device_get_parent(child) != dev)
|
|
return bus_generic_alloc_resource(dev, child, type, rid, start,
|
|
end, count, flags);
|
|
|
|
switch (type) {
|
|
case SYS_RES_MEMORY:
|
|
case SYS_RES_IOPORT:
|
|
/*
|
|
* For BARs, we cache the resource so that we only allocate it
|
|
* from the PCI bus once.
|
|
*/
|
|
bar = PCI_RID2BAR(*rid);
|
|
if (bar < 0 || bar > PCIR_MAX_BAR_0)
|
|
return (NULL);
|
|
sc = device_get_softc(dev);
|
|
if (sc->isab_pci_res[bar].ip_res == NULL)
|
|
sc->isab_pci_res[bar].ip_res = bus_alloc_resource(dev, type,
|
|
rid, start, end, count, flags);
|
|
if (sc->isab_pci_res[bar].ip_res != NULL)
|
|
sc->isab_pci_res[bar].ip_refs++;
|
|
return (sc->isab_pci_res[bar].ip_res);
|
|
}
|
|
|
|
return (BUS_ALLOC_RESOURCE(device_get_parent(dev), child, type, rid,
|
|
start, end, count, flags));
|
|
}
|
|
|
|
static int
|
|
isab_pci_release_resource(device_t dev, device_t child, int type, int rid,
|
|
struct resource *r)
|
|
{
|
|
struct isab_pci_softc *sc;
|
|
int bar, error;
|
|
|
|
if (device_get_parent(child) != dev)
|
|
return bus_generic_release_resource(dev, child, type, rid, r);
|
|
|
|
switch (type) {
|
|
case SYS_RES_MEMORY:
|
|
case SYS_RES_IOPORT:
|
|
/*
|
|
* For BARs, we release the resource from the PCI bus
|
|
* when the last child reference goes away.
|
|
*/
|
|
bar = PCI_RID2BAR(rid);
|
|
if (bar < 0 || bar > PCIR_MAX_BAR_0)
|
|
return (EINVAL);
|
|
sc = device_get_softc(dev);
|
|
if (sc->isab_pci_res[bar].ip_res == NULL)
|
|
return (EINVAL);
|
|
KASSERT(sc->isab_pci_res[bar].ip_res == r,
|
|
("isa_pci resource mismatch"));
|
|
if (sc->isab_pci_res[bar].ip_refs > 1) {
|
|
sc->isab_pci_res[bar].ip_refs--;
|
|
return (0);
|
|
}
|
|
KASSERT(sc->isab_pci_res[bar].ip_refs > 0,
|
|
("isa_pci resource reference count underflow"));
|
|
error = bus_release_resource(dev, type, rid, r);
|
|
if (error == 0) {
|
|
sc->isab_pci_res[bar].ip_res = NULL;
|
|
sc->isab_pci_res[bar].ip_refs = 0;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
return (BUS_RELEASE_RESOURCE(device_get_parent(dev), child, type,
|
|
rid, r));
|
|
}
|