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/* $OpenBSD: ppb.c,v 1.18 2007/02/13 18:35:32 tom Exp $ */
/* $NetBSD: ppb.c,v 1.16 1997/06/06 23:48:05 thorpej Exp $ */
/*
* Copyright (c) 1996 Christopher G. Demetriou. 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 Christopher G. Demetriou
* for the NetBSD Project.
* 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.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>
#include <dev/pci/ppbreg.h>
struct ppb_softc {
struct device sc_dev; /* generic device glue */
pci_chipset_tag_t sc_pc; /* our PCI chipset... */
pcitag_t sc_tag; /* ...and tag. */
};
int ppbmatch(struct device *, void *, void *);
void ppbattach(struct device *, struct device *, void *);
struct cfattach ppb_ca = {
sizeof(struct ppb_softc), ppbmatch, ppbattach
};
struct cfdriver ppb_cd = {
NULL, "ppb", DV_DULL
};
int ppbprint(void *, const char *pnp);
int
ppbmatch(struct device *parent, void *match, void *aux)
{
struct pci_attach_args *pa = aux;
/*
* This device is mislabeled. It is not a PCI bridge.
*/
if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_VIATECH &&
PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_VIATECH_VT82C586_PWR)
return (0);
/*
* Check the ID register to see that it's a PCI bridge.
* If it is, we assume that we can deal with it; it _should_
* work in a standardized way...
*/
if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_PCI)
return (1);
return (0);
}
void
ppbattach(struct device *parent, struct device *self, void *aux)
{
struct ppb_softc *sc = (void *) self;
struct pci_attach_args *pa = aux;
pci_chipset_tag_t pc = pa->pa_pc;
struct pcibus_attach_args pba;
pcireg_t busdata;
printf("\n");
sc->sc_pc = pc;
sc->sc_tag = pa->pa_tag;
busdata = pci_conf_read(pc, pa->pa_tag, PPB_REG_BUSINFO);
if (PPB_BUSINFO_SECONDARY(busdata) == 0) {
printf("%s: not configured by system firmware\n",
self->dv_xname);
return;
}
#if 0
/*
* XXX can't do this, because we're not given our bus number
* (we shouldn't need it), and because we've no way to
* decompose our tag.
*/
/* sanity check. */
if (pa->pa_bus != PPB_BUSINFO_PRIMARY(busdata))
panic("ppbattach: bus in tag (%d) != bus in reg (%d)",
pa->pa_bus, PPB_BUSINFO_PRIMARY(busdata));
#endif
/*
* Attach the PCI bus that hangs off of it.
*
* XXX Don't pass-through Memory Read Multiple. Should we?
* XXX Consult the spec...
*/
pba.pba_busname = "pci";
pba.pba_iot = pa->pa_iot;
pba.pba_memt = pa->pa_memt;
pba.pba_dmat = pa->pa_dmat;
pba.pba_pc = pc;
#if 0
pba.pba_flags = pa->pa_flags & ~PCI_FLAGS_MRM_OKAY;
#endif
pba.pba_domain = pa->pa_domain;
pba.pba_bus = PPB_BUSINFO_SECONDARY(busdata);
pba.pba_bridgetag = &sc->sc_tag;
pba.pba_intrswiz = pa->pa_intrswiz;
pba.pba_intrtag = pa->pa_intrtag;
config_found(self, &pba, ppbprint);
}
int
ppbprint(void *aux, const char *pnp)
{
struct pcibus_attach_args *pba = aux;
/* only PCIs can attach to PPBs; easy. */
if (pnp)
printf("pci at %s", pnp);
printf(" bus %d", pba->pba_bus);
return (UNCONF);
}
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