NetBSD-5.0.2/sys/arch/x86/pci/pcib.c
/* $NetBSD: pcib.c,v 1.7 2008/08/04 06:01:18 cegger Exp $ */
/*-
* Copyright (c) 1996, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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>
__KERNEL_RCSID(0, "$NetBSD: pcib.c,v 1.7 2008/08/04 06:01:18 cegger Exp $");
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <dev/isa/isavar.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>
#include "isa.h"
#include "pcibvar.h"
int pcibmatch(device_t, cfdata_t, void *);
void pcibattach(device_t, device_t, void *);
int pcibdetach(device_t, int);
void pcibchilddet(device_t, device_t);
CFATTACH_DECL2_NEW(pcib, sizeof(struct pcib_softc),
pcibmatch, pcibattach, pcibdetach, NULL, NULL, pcibchilddet);
void pcib_callback(device_t);
int
pcibmatch(device_t parent, cfdata_t match, void *aux)
{
struct pci_attach_args *pa = aux;
#if 0
/*
* PCI-ISA bridges are matched on class/subclass.
* This list contains only the bridges where correct
* (or incorrect) behaviour is not yet confirmed.
*/
switch (PCI_VENDOR(pa->pa_id)) {
case PCI_VENDOR_INTEL:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_INTEL_82426EX:
case PCI_PRODUCT_INTEL_82380AB:
return (1);
}
break;
case PCI_VENDOR_UMC:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_UMC_UM8886F:
case PCI_PRODUCT_UMC_UM82C886:
return (1);
}
break;
case PCI_VENDOR_ALI:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_ALI_M1449:
case PCI_PRODUCT_ALI_M1543:
return (1);
}
break;
case PCI_VENDOR_COMPAQ:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_COMPAQ_PCI_ISA_BRIDGE:
return (1);
}
break;
case PCI_VENDOR_VIATECH:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_VIATECH_VT82C570MV:
case PCI_PRODUCT_VIATECH_VT82C586_ISA:
return (1);
}
break;
}
#endif
/*
* some special cases:
*/
switch (PCI_VENDOR(pa->pa_id)) {
case PCI_VENDOR_INTEL:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_INTEL_SIO:
/*
* The Intel SIO identifies itself as a
* miscellaneous prehistoric.
*/
case PCI_PRODUCT_INTEL_82371MX:
/*
* The Intel 82371MX identifies itself erroneously as a
* miscellaneous bridge.
*/
case PCI_PRODUCT_INTEL_82371AB_ISA:
/*
* Some Intel 82371AB PCI-ISA bridge identifies
* itself as miscellaneous bridge.
*/
return (1);
}
break;
case PCI_VENDOR_SIS:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_SIS_85C503:
/*
* The SIS 85C503 identifies itself as a
* miscellaneous prehistoric.
*/
return (1);
}
break;
case PCI_VENDOR_VIATECH:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_VIATECH_VT82C686A_SMB:
/*
* The VIA VT82C686A SMBus Controller itself as
* ISA bridge, but it's wrong !
*/
return (0);
}
/*
* The Cyrix cs5530 PCI host bridge does not have a broken
* latch on the i8254 clock core, unlike its predecessors
* the cs5510 and cs5520. This reverses the setting from
* i386/i386/identcpu.c where it arguably should not have
* been set in the first place. XXX
*/
case PCI_VENDOR_CYRIX:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_CYRIX_CX5530_PCIB:
#if !defined(XEN)
{
extern int clock_broken_latch;
clock_broken_latch = 0;
}
#endif
return(1);
}
break;
}
if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA) {
return (1);
}
return (0);
}
void
pcibattach(device_t parent, device_t self, void *aux)
{
struct pcib_softc *sc = device_private(self);
struct pci_attach_args *pa = aux;
char devinfo[256];
aprint_naive("\n");
aprint_normal("\n");
/*
* Just print out a description and defer configuration
* until all PCI devices have been attached.
*/
pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
aprint_normal_dev(self, "%s (rev. 0x%02x)\n", devinfo,
PCI_REVISION(pa->pa_class));
sc->sc_pc = pa->pa_pc;
sc->sc_tag = pa->pa_tag;
/* If a more specific pcib implementation has already registered a
* power handler, don't overwrite it.
*/
if (!device_pmf_is_registered(self)) {
if (!pmf_device_register(self, NULL, NULL))
aprint_error_dev(self, "couldn't establish power handler\n");
}
config_defer(self, pcib_callback);
}
int
pcibdetach(device_t self, int flags)
{
int rc;
if ((rc = config_detach_children(self, flags)) != 0)
return rc;
pmf_device_deregister(self);
return 0;
}
void
pcibchilddet(device_t self, device_t child)
{
/* we keep no references to children, so do nothing */
}
void
pcib_callback(device_t self)
{
struct isabus_attach_args iba;
/*
* Attach the ISA bus behind this bridge.
*/
memset(&iba, 0, sizeof(iba));
iba.iba_iot = X86_BUS_SPACE_IO;
iba.iba_memt = X86_BUS_SPACE_MEM;
#if NISA > 0
iba.iba_dmat = &isa_bus_dma_tag;
#endif
config_found_ia(self, "isabus", &iba, isabusprint);
}