/* $OpenBSD: ppb.c,v 1.3 1996/05/07 07:38:51 deraadt Exp $ */ /* $NetBSD: ppb.c,v 1.8 1996/05/03 17:33:51 christos 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. */ /* * XXX NOTE: * XXX PROPER OPERATION OF DEVICES BEHIND PPB'S WHICH USE INTERRUPTS * XXX ON SYSTEMS OTHER THAN THE i386 IS NOT POSSIBLE AT THIS TIME. * XXX There needs to be some support for 'swizzling' the interrupt * XXX pin. In general, pci_map_int() has to have a different * XXX interface. */ #include #include #include #include #include #include #include #include int ppbmatch __P((struct device *, void *, void *)); void ppbattach __P((struct device *, struct device *, void *)); struct cfattach ppb_ca = { sizeof(struct device), ppbmatch, ppbattach }; struct cfdriver ppb_cd = { NULL, "ppb", DV_DULL }; int ppbprint __P((void *, char *pnp)); int ppbmatch(parent, match, aux) struct device *parent; void *match, *aux; { struct pci_attach_args *pa = aux; /* * 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(parent, self, aux) struct device *parent, *self; void *aux; { struct pci_attach_args *pa = aux; pci_chipset_tag_t pc = pa->pa_pc; struct pcibus_attach_args pba; pcireg_t busdata; char devinfo[256]; pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo); printf(": %s (rev. 0x%02x)\n", devinfo, PCI_REVISION(pa->pa_class)); 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. */ pba.pba_busname = "pci"; pba.pba_bc = pa->pa_bc; pba.pba_pc = pc; pba.pba_bus = PPB_BUSINFO_SECONDARY(busdata); pba.pba_intrswiz = pa->pa_intrswiz; pba.pba_intrtag = pa->pa_intrtag; config_found(self, &pba, ppbprint); } int ppbprint(aux, pnp) void *aux; 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); }