/* $OpenBSD: ppb.c,v 1.17 2006/12/14 17:36:12 kettenis 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 #include #include #include #include #include #include #include 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 than 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); }