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/*-
* 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));
}
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