NetBSD/sys/arch/i386/pci/pchb.c

268 lines
7.3 KiB
C

/* $NetBSD: pchb.c,v 1.17 1998/10/10 14:12:21 drochner 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>
#define PCISET_BRIDGETYPE_MASK 0x3
#define PCISET_TYPE_COMPAT 0x1
#define PCISET_TYPE_AUX 0x2
#define PCISET_BUSCONFIG_REG 0x48
#define PCISET_BRIDGE_NUMBER(reg) (((reg) >> 8) & 0xff)
#define PCISET_PCI_BUS_NUMBER(reg) (((reg) >> 16) & 0xff)
/* XXX should be in dev/ic/i82424{reg.var}.h */
#define I82424_CPU_BCTL_REG 0x53
#define I82424_PCI_BCTL_REG 0x54
#define I82424_BCTL_CPUMEM_POSTEN 0x01
#define I82424_BCTL_CPUPCI_POSTEN 0x02
#define I82424_BCTL_PCIMEM_BURSTEN 0x01
#define I82424_BCTL_PCI_BURSTEN 0x02
int pchbmatch __P((struct device *, struct cfdata *, void *));
void pchbattach __P((struct device *, struct device *, void *));
int pchb_print __P((void *, const char *));
struct cfattach pchb_ca = {
sizeof(struct device), pchbmatch, pchbattach
};
int
pchbmatch(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct pci_attach_args *pa = aux;
#if 0
/*
* PCI host 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_CDC:
case PCI_PRODUCT_INTEL_PCMC:
case PCI_PRODUCT_INTEL_82437FX:
case PCI_PRODUCT_INTEL_82437MX:
case PCI_PRODUCT_INTEL_82437VX:
case PCI_PRODUCT_INTEL_82439HX:
case PCI_PRODUCT_INTEL_82441FX:
case PCI_PRODUCT_INTEL_82443BX:
case PCI_PRODUCT_INTEL_82443LX:
case PCI_PRODUCT_INTEL_PCI450_PB:
case PCI_PRODUCT_INTEL_PCI450_MC:
return (1);
}
break;
case PCI_VENDOR_UMC:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_UMC_UM8891N:
case PCI_PRODUCT_UMC_UM8881F:
return (1);
}
break;
case PCI_VENDOR_ACC:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_ACC_2188:
return (1);
}
break;
case PCI_VENDOR_ACER:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_ACER_M1435:
return (1);
}
break;
case PCI_VENDOR_ALI:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_ALI_M1445:
case PCI_PRODUCT_ALI_M1451:
case PCI_PRODUCT_ALI_M1461:
case PCI_PRODUCT_ALI_M1541:
return (1);
}
break;
case PCI_VENDOR_COMPAQ:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_COMPAQ_TRIFLEX1:
case PCI_PRODUCT_COMPAQ_TRIFLEX2:
case PCI_PRODUCT_COMPAQ_TRIFLEX4:
return (1);
}
break;
case PCI_VENDOR_NEXGEN:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_NEXGEN_NX82C501:
return (1);
}
break;
case PCI_VENDOR_NKK:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_NKK_NDR4600:
return (1);
}
break;
case PCI_VENDOR_TOSHIBA:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_TOSHIBA_R4X00:
return (1);
}
break;
case PCI_VENDOR_VIATECH:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_VIATECH_VT82C570M:
case PCI_PRODUCT_VIATECH_VT82C595:
return (1);
}
break;
}
#endif
if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_HOST) {
return (1);
}
return (0);
}
void
pchbattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct pci_attach_args *pa = aux;
char devinfo[256];
struct pcibus_attach_args pba;
pcireg_t bcreg;
u_char bdnum, pbnum;
printf("\n");
/*
* Print out a description, and configure certain chipsets which
* have auxiliary PCI buses.
*/
pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo);
printf("%s: %s (rev. 0x%02x)\n", self->dv_xname, devinfo,
PCI_REVISION(pa->pa_class));
switch (PCI_VENDOR(pa->pa_id)) {
case PCI_VENDOR_INTEL:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_INTEL_PCI450_PB:
bcreg = pci_conf_read(pa->pa_pc, pa->pa_tag,
PCISET_BUSCONFIG_REG);
bdnum = PCISET_BRIDGE_NUMBER(bcreg);
pbnum = PCISET_PCI_BUS_NUMBER(bcreg);
switch (bdnum & PCISET_BRIDGETYPE_MASK) {
default:
printf("%s: bdnum=%x (reserved)\n",
self->dv_xname, bdnum);
break;
case PCISET_TYPE_COMPAT:
printf("%s: Compatibility PB (bus %d)\n",
self->dv_xname, pbnum);
break;
case PCISET_TYPE_AUX:
printf("%s: Auxiliary PB (bus %d)\n",
self->dv_xname, pbnum);
/*
* This host bridge has a second PCI bus.
* Configure it.
*/
pba.pba_busname = "pci";
pba.pba_iot = pa->pa_iot;
pba.pba_memt = pa->pa_memt;
pba.pba_dmat = pa->pa_dmat;
pba.pba_bus = pbnum;
pba.pba_flags = pa->pa_flags;
pba.pba_pc = pa->pa_pc;
config_found(self, &pba, pchb_print);
break;
}
break;
case PCI_PRODUCT_INTEL_CDC:
bcreg = pci_conf_read(pa->pa_pc, pa->pa_tag,
I82424_CPU_BCTL_REG);
if (bcreg & I82424_BCTL_CPUPCI_POSTEN) {
bcreg &= ~I82424_BCTL_CPUPCI_POSTEN;
pci_conf_write(pa->pa_pc, pa->pa_tag,
I82424_CPU_BCTL_REG, bcreg);
printf("%s: disabled CPU-PCI write posting\n",
self->dv_xname);
}
break;
}
/*
* XXX: vendor=PEQUR, device=0x0005 - host bridge with
* auxiliary PCI bus (used in Compaq Proliant) should
* be here, but I don't have enough information.
*/
}
}
int
pchb_print(aux, pnp)
void *aux;
const char *pnp;
{
struct pcibus_attach_args *pba = aux;
if (pnp)
printf("%s at %s", pba->pba_busname, pnp);
printf(" bus %d", pba->pba_bus);
return (UNCONF);
}