adc38bf22f
the parent PCI bus. Heavily inspired by jhb@ and a similar implementation present in sys/dev/pci/vga_pci.c. Reviewed by: jhb Approved by: jhb
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_print_child, bus_generic_print_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),
|
|
|
|
{ 0, 0 }
|
|
};
|
|
|
|
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));
|
|
}
|