/* $NetBSD: pcib.c,v 1.10 2009/08/23 15:42:51 jmcneill Exp $ */ /*- * Copyright (c) 1996, 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 FOUNDATION OR CONTRIBUTORS * 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: pcib.c,v 1.10 2009/08/23 15:42:51 jmcneill Exp $"); #include #include #include #include #include #include #include #include #include #include "isa.h" #include "pcibvar.h" int pcibmatch(device_t, cfdata_t, void *); CFATTACH_DECL3_NEW(pcib, sizeof(struct pcib_softc), pcibmatch, pcibattach, pcibdetach, NULL, pcibrescan, pcibchilddet, DVF_DETACH_SHUTDOWN); void pcib_callback(device_t); int pcibmatch(device_t parent, cfdata_t match, void *aux) { struct pci_attach_args *pa = aux; #if 0 /* * PCI-ISA bridges are matched on class/subclass. * This list contains only the bridges where correct * (or incorrect) behaviour is not yet confirmed. */ switch (PCI_VENDOR(pa->pa_id)) { case PCI_VENDOR_INTEL: switch (PCI_PRODUCT(pa->pa_id)) { case PCI_PRODUCT_INTEL_82426EX: case PCI_PRODUCT_INTEL_82380AB: return (1); } break; case PCI_VENDOR_UMC: switch (PCI_PRODUCT(pa->pa_id)) { case PCI_PRODUCT_UMC_UM8886F: case PCI_PRODUCT_UMC_UM82C886: return (1); } break; case PCI_VENDOR_ALI: switch (PCI_PRODUCT(pa->pa_id)) { case PCI_PRODUCT_ALI_M1449: case PCI_PRODUCT_ALI_M1543: return (1); } break; case PCI_VENDOR_COMPAQ: switch (PCI_PRODUCT(pa->pa_id)) { case PCI_PRODUCT_COMPAQ_PCI_ISA_BRIDGE: return (1); } break; case PCI_VENDOR_VIATECH: switch (PCI_PRODUCT(pa->pa_id)) { case PCI_PRODUCT_VIATECH_VT82C570MV: case PCI_PRODUCT_VIATECH_VT82C586_ISA: return (1); } break; } #endif /* * some special cases: */ switch (PCI_VENDOR(pa->pa_id)) { case PCI_VENDOR_INTEL: switch (PCI_PRODUCT(pa->pa_id)) { case PCI_PRODUCT_INTEL_SIO: /* * The Intel SIO identifies itself as a * miscellaneous prehistoric. */ case PCI_PRODUCT_INTEL_82371MX: /* * The Intel 82371MX identifies itself erroneously as a * miscellaneous bridge. */ case PCI_PRODUCT_INTEL_82371AB_ISA: /* * Some Intel 82371AB PCI-ISA bridge identifies * itself as miscellaneous bridge. */ return (1); } break; case PCI_VENDOR_SIS: switch (PCI_PRODUCT(pa->pa_id)) { case PCI_PRODUCT_SIS_85C503: /* * The SIS 85C503 identifies itself as a * miscellaneous prehistoric. */ return (1); } break; case PCI_VENDOR_VIATECH: switch (PCI_PRODUCT(pa->pa_id)) { case PCI_PRODUCT_VIATECH_VT82C686A_SMB: /* * The VIA VT82C686A SMBus Controller itself as * ISA bridge, but it's wrong ! */ return (0); } /* * The Cyrix cs5530 PCI host bridge does not have a broken * latch on the i8254 clock core, unlike its predecessors * the cs5510 and cs5520. This reverses the setting from * i386/i386/identcpu.c where it arguably should not have * been set in the first place. XXX */ case PCI_VENDOR_CYRIX: switch (PCI_PRODUCT(pa->pa_id)) { case PCI_PRODUCT_CYRIX_CX5530_PCIB: #if !defined(XEN) { extern int clock_broken_latch; clock_broken_latch = 0; } #endif return(1); } break; } if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA) { return (1); } return (0); } void pcibattach(device_t parent, device_t self, void *aux) { struct pcib_softc *sc = device_private(self); struct pci_attach_args *pa = aux; char devinfo[256]; aprint_naive("\n"); /* * Just print out a description and defer configuration * until all PCI devices have been attached. */ 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)); sc->sc_pc = pa->pa_pc; sc->sc_tag = pa->pa_tag; /* If a more specific pcib implementation has already registered a * power handler, don't overwrite it. */ if (!device_pmf_is_registered(self)) { if (!pmf_device_register(self, NULL, NULL)) aprint_error_dev(self, "couldn't establish power handler\n"); } config_defer(self, pcib_callback); } int pcibdetach(device_t self, int flags) { int rc; if ((rc = config_detach_children(self, flags)) != 0) return rc; pmf_device_deregister(self); return 0; } void pcibchilddet(device_t self, device_t child) { struct pcib_softc *sc = device_private(self); if (sc->sc_isabus == child) sc->sc_isabus = NULL; } /* XXX share this with sys/arch/i386/pci/elan520.c */ static bool ifattr_match(const char *snull, const char *t) { return (snull == NULL) || strcmp(snull, t) == 0; } int pcibrescan(device_t self, const char *ifattr, const int *loc) { struct pcib_softc *sc = device_private(self); struct isabus_attach_args iba; if (ifattr_match(ifattr, "isabus") && sc->sc_isabus == NULL) { /* * Attach the ISA bus behind this bridge. */ memset(&iba, 0, sizeof(iba)); iba.iba_iot = X86_BUS_SPACE_IO; iba.iba_memt = X86_BUS_SPACE_MEM; #if NISA > 0 iba.iba_dmat = &isa_bus_dma_tag; #endif sc->sc_isabus = config_found_ia(self, "isabus", &iba, isabusprint); } return 0; } void pcib_callback(device_t self) { pcibrescan(self, "isabus", NULL); }