FreeBSD-5.3/sys/dev/pci/isa_pci.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: src/sys/dev/pci/isa_pci.c,v 1.12 2004/05/30 17:57:42 phk Exp $");
/*
* PCI:ISA bridge support
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <isa/isavar.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#define ELCR_IOADDR 0x4d0 /* Interrupt Edge/Level Control Registers */
#define ELCR_IOLEN 2
struct isab_softc {
struct resource *elcr_res;
u_char saved_elcr[ELCR_IOLEN];
};
static int isab_probe(device_t dev);
static int pci_isab_attach(device_t dev);
static int isab_detach(device_t dev);
static int isab_resume(device_t dev);
static int isab_suspend(device_t dev);
static device_method_t isab_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, isab_probe),
DEVMETHOD(device_attach, pci_isab_attach),
DEVMETHOD(device_detach, isab_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, isab_suspend),
DEVMETHOD(device_resume, isab_resume),
/* Bus interface */
DEVMETHOD(bus_print_child, bus_generic_print_child),
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),
{ 0, 0 }
};
static driver_t isab_driver = {
"isab",
isab_methods,
sizeof(struct isab_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_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
pci_isab_attach(device_t dev)
{
struct isab_softc *sc = device_get_softc(dev);
int error, rid;
/*
* Attach an ISA bus. Note that we can only have one ISA bus.
*/
error = isab_attach(dev);
if (error)
return (error);
switch (pci_get_devid(dev)) {
case 0x71108086: /* Intel 82371AB */
/*
* Sometimes the ELCR (Edge/Level Control Register) is not restored
* correctly on resume by the BIOS, so we handle it ourselves.
*/
rid = 0;
bus_set_resource(dev, SYS_RES_IOPORT, rid, ELCR_IOADDR, ELCR_IOLEN);
sc->elcr_res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
RF_ACTIVE);
if (sc->elcr_res == NULL)
device_printf(dev, "failed to allocate ELCR resource\n");
break;
}
return(0);
}
static int
isab_detach(device_t dev)
{
struct isab_softc *sc = device_get_softc(dev);
if (sc->elcr_res != NULL)
bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->elcr_res);
return (bus_generic_detach(dev));
}
static int
isab_suspend(device_t dev)
{
struct isab_softc *sc = device_get_softc(dev);
bus_space_tag_t bst;
bus_space_handle_t bsh;
int i;
/* Save the ELCR if required. */
if (sc->elcr_res != NULL) {
bst = rman_get_bustag(sc->elcr_res);
bsh = rman_get_bushandle(sc->elcr_res);
for (i = 0; i < ELCR_IOLEN; i++)
sc->saved_elcr[i] = bus_space_read_1(bst, bsh, i);
}
return (bus_generic_suspend(dev));
}
static int
isab_resume(device_t dev)
{
struct isab_softc *sc = device_get_softc(dev);
bus_space_tag_t bst;
bus_space_handle_t bsh;
int i;
/* Restore the ELCR if required. */
if (sc->elcr_res != NULL) {
bst = rman_get_bustag(sc->elcr_res);
bsh = rman_get_bushandle(sc->elcr_res);
for (i = 0; i < ELCR_IOLEN; i++)
bus_space_write_1(bst, bsh, i, sc->saved_elcr[i]);
}
return (bus_generic_resume(dev));
}