/* $NetBSD: ppb.c,v 1.39 2008/05/03 05:44:06 cegger Exp $ */ /* * Copyright (c) 1996, 1998 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 __KERNEL_RCSID(0, "$NetBSD: ppb.c,v 1.39 2008/05/03 05:44:06 cegger Exp $"); #include #include #include #include #include #include #include #include struct ppb_softc { device_t sc_dev; /* generic device glue */ pci_chipset_tag_t sc_pc; /* our PCI chipset... */ pcitag_t sc_tag; /* ...and tag. */ pcireg_t sc_pciconfext[48]; }; static bool ppb_resume(device_t PMF_FN_PROTO); static bool ppb_suspend(device_t PMF_FN_PROTO); static int ppbmatch(device_t parent, cfdata_t match, void *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; } static void ppb_fix_pcix(device_t self) { struct ppb_softc *sc = device_private(self); pcireg_t reg; int off; if (!pci_get_capability(sc->sc_pc, sc->sc_tag, PCI_CAP_PCIEXPRESS, &off, ®)) return; /* Not a PCIe device */ if ((reg & 0x000f0000) != 0x00010000) { aprint_normal_dev(self, "unsupported PCI Express version\n"); return; } reg = pci_conf_read(sc->sc_pc, sc->sc_tag, off + 0x18); if (reg & 0x003f) { aprint_normal_dev(self, "disabling notification events\n"); reg &= ~0x003f; pci_conf_write(sc->sc_pc, sc->sc_tag, off + 0x18, reg); } } static void ppbattach(device_t parent, device_t self, void *aux) { struct ppb_softc *sc = device_private(self); 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, sizeof(devinfo)); aprint_normal(": %s (rev. 0x%02x)\n", devinfo, PCI_REVISION(pa->pa_class)); aprint_naive("\n"); sc->sc_pc = pc; sc->sc_tag = pa->pa_tag; sc->sc_dev = self; busdata = pci_conf_read(pc, pa->pa_tag, PPB_REG_BUSINFO); if (PPB_BUSINFO_SECONDARY(busdata) == 0) { aprint_normal_dev(self, "not configured by system firmware\n"); return; } ppb_fix_pcix(self); #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 if (!pmf_device_register(self, ppb_suspend, ppb_resume)) aprint_error_dev(self, "couldn't establish power handler\n"); /* * 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_iot = pa->pa_iot; pba.pba_memt = pa->pa_memt; pba.pba_dmat = pa->pa_dmat; pba.pba_dmat64 = pa->pa_dmat64; pba.pba_pc = pc; pba.pba_flags = pa->pa_flags & ~PCI_FLAGS_MRM_OKAY; 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_ia(self, "pcibus", &pba, pcibusprint); } static int ppbdetach(device_t self, int flags) { int rc; if ((rc = config_detach_children(self, flags)) != 0) return rc; pmf_device_deregister(self); return 0; } static bool ppb_resume(device_t dv PMF_FN_ARGS) { struct ppb_softc *sc = device_private(dv); int off; pcireg_t val; for (off = 0x40; off <= 0xff; off += 4) { val = pci_conf_read(sc->sc_pc, sc->sc_tag, off); if (val != sc->sc_pciconfext[(off - 0x40) / 4]) pci_conf_write(sc->sc_pc, sc->sc_tag, off, sc->sc_pciconfext[(off - 0x40)/4]); } ppb_fix_pcix(dv); return true; } static bool ppb_suspend(device_t dv PMF_FN_ARGS) { struct ppb_softc *sc = device_private(dv); int off; for (off = 0x40; off <= 0xff; off += 4) sc->sc_pciconfext[(off - 0x40) / 4] = pci_conf_read(sc->sc_pc, sc->sc_tag, off); return true; } static void ppbchilddet(device_t self, device_t child) { /* we keep no references to child devices, so do nothing */ } CFATTACH_DECL2_NEW(ppb, sizeof(struct ppb_softc), ppbmatch, ppbattach, ppbdetach, NULL, NULL, ppbchilddet);