NetBSD/sys/dev/pci/pci.c

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/* $NetBSD: pci.c,v 1.16 1996/03/17 00:55:38 thorpej Exp $ */
/*
* Copyright (c) 1995, 1996 Christopher G. Demetriou. All rights reserved.
* Copyright (c) 1994 Charles Hannum. 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Charles Hannum.
* 4. 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 ``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 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.
*/
/*
* PCI bus autoconfiguration.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
int pcimatch __P((struct device *, void *, void *));
void pciattach __P((struct device *, struct device *, void *));
struct cfattach pci_ca = {
sizeof(struct device), pcimatch, pciattach
};
struct cfdriver pci_cd = {
NULL, "pci", DV_DULL
};
int pciprint __P((void *, char *));
int pcisubmatch __P((struct device *, void *, void *));
int
pcimatch(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct cfdata *cf = match;
struct pcibus_attach_args *pba = aux;
if (strcmp(pba->pba_busname, cf->cf_driver->cd_name))
return (0);
/* Check the locators */
if (cf->pcibuscf_bus != PCIBUS_UNK_BUS &&
cf->pcibuscf_bus != pba->pba_bus)
return (0);
/* sanity */
if (pba->pba_bus < 0 || pba->pba_bus > 255)
return (0);
/*
* XXX check other (hardware?) indicators
*/
return 1;
}
void
pciattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct pcibus_attach_args *pba = aux;
bus_chipset_tag_t bc;
int device, function, nfunctions;
pci_md_attach_hook(parent, self, pba);
printf("\n");
for (device = 0; device < PCI_MAX_DEVICE_NUMBER; device++) {
pcitag_t tag;
pcireg_t id, class;
struct pci_attach_args pa;
struct cfdata *cf;
int supported;
tag = pci_make_tag(pba->pba_bus, device, 0);
id = pci_conf_read(tag, PCI_ID_REG);
if (id == 0 || id == 0xffffffff)
continue;
nfunctions = 1; /* XXX */
for (function = 0; function < nfunctions; function++) {
tag = pci_make_tag(pba->pba_bus, device, function);
id = pci_conf_read(tag, PCI_ID_REG);
if (id == 0 || id == 0xffffffff)
continue;
class = pci_conf_read(tag, PCI_CLASS_REG);
pa.pa_bc = pba->pba_bc;
pa.pa_device = device;
pa.pa_function = function;
pa.pa_tag = tag;
pa.pa_id = id;
pa.pa_class = class;
config_found_sm(self, &pa, pciprint, pcisubmatch);
}
}
}
int
pciprint(aux, pnp)
void *aux;
char *pnp;
{
register struct pci_attach_args *pa = aux;
char devinfo[256];
if (pnp) {
pci_devinfo(pa->pa_id, pa->pa_class, 1, devinfo);
printf("%s at %s", devinfo, pnp);
}
printf(" dev %d function %d", pa->pa_device, pa->pa_function);
return (UNCONF);
}
int
pcisubmatch(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct cfdata *cf = match;
struct pci_attach_args *pa = aux;
if (cf->pcicf_dev != PCI_UNK_DEV &&
cf->pcicf_dev != pa->pa_device)
return 0;
if (cf->pcicf_function != PCI_UNK_FUNCTION &&
cf->pcicf_function != pa->pa_function)
return 0;
return ((*cf->cf_attach->ca_match)(parent, match, aux));
}