1 /*- 2 * Copyright (c) 2000 Michael Smith 3 * Copyright (c) 2000 BSDi 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/module.h> 33 #include <sys/bus.h> 34 #include <sys/malloc.h> 35 #include <sys/kernel.h> 36 37 #include <dev/ofw/openfirm.h> 38 #include <dev/ofw/ofw_pci.h> 39 #include <dev/ofw/ofw_bus.h> 40 #include <dev/ofw/ofw_bus_subr.h> 41 42 #include <dev/pci/pcivar.h> 43 #include <dev/pci/pcireg.h> 44 #include <dev/pci/pcib_private.h> 45 46 #include <machine/intr_machdep.h> 47 48 #include "pcib_if.h" 49 50 static int ofw_pcib_pci_probe(device_t bus); 51 static int ofw_pcib_pci_attach(device_t bus); 52 static phandle_t ofw_pcib_pci_get_node(device_t bus, device_t dev); 53 static int ofw_pcib_pci_route_interrupt(device_t bridge, device_t dev, 54 int intpin); 55 56 static device_method_t ofw_pcib_pci_methods[] = { 57 /* Device interface */ 58 DEVMETHOD(device_probe, ofw_pcib_pci_probe), 59 DEVMETHOD(device_attach, ofw_pcib_pci_attach), 60 61 /* pcib interface */ 62 DEVMETHOD(pcib_route_interrupt, ofw_pcib_pci_route_interrupt), 63 64 /* ofw_bus interface */ 65 DEVMETHOD(ofw_bus_get_node, ofw_pcib_pci_get_node), 66 67 DEVMETHOD_END 68 }; 69 70 static devclass_t pcib_devclass; 71 72 struct ofw_pcib_softc { 73 /* 74 * This is here so that we can use pci bridge methods, too - the 75 * generic routines only need the dev, secbus and subbus members 76 * filled. 77 */ 78 struct pcib_softc ops_pcib_sc; 79 phandle_t ops_node; 80 struct ofw_bus_iinfo ops_iinfo; 81 }; 82 83 DEFINE_CLASS_1(pcib, ofw_pcib_pci_driver, ofw_pcib_pci_methods, 84 sizeof(struct ofw_pcib_softc), pcib_driver); 85 DRIVER_MODULE(ofw_pcib, pci, ofw_pcib_pci_driver, pcib_devclass, 0, 0); 86 87 static int 88 ofw_pcib_pci_probe(device_t dev) 89 { 90 91 if ((pci_get_class(dev) != PCIC_BRIDGE) || 92 (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) { 93 return (ENXIO); 94 } 95 96 if (ofw_bus_get_node(dev) == -1) 97 return (ENXIO); 98 99 device_set_desc(dev, "OFW PCI-PCI bridge"); 100 return (0); 101 } 102 103 static int 104 ofw_pcib_pci_attach(device_t dev) 105 { 106 struct ofw_pcib_softc *sc; 107 108 sc = device_get_softc(dev); 109 sc->ops_pcib_sc.dev = dev; 110 sc->ops_node = ofw_bus_get_node(dev); 111 112 ofw_bus_setup_iinfo(sc->ops_node, &sc->ops_iinfo, 113 sizeof(cell_t)); 114 115 pcib_attach_common(dev); 116 117 device_add_child(dev, "pci", -1); 118 119 return (bus_generic_attach(dev)); 120 } 121 122 static phandle_t 123 ofw_pcib_pci_get_node(device_t bridge, device_t dev) 124 { 125 /* We have only one child, the PCI bus, so pass it our node */ 126 127 return (ofw_bus_get_node(bridge)); 128 } 129 130 static int 131 ofw_pcib_pci_route_interrupt(device_t bridge, device_t dev, int intpin) 132 { 133 struct ofw_pcib_softc *sc; 134 struct ofw_bus_iinfo *ii; 135 struct ofw_pci_register reg; 136 cell_t pintr, mintr; 137 phandle_t iparent; 138 uint8_t maskbuf[sizeof(reg) + sizeof(pintr)]; 139 140 sc = device_get_softc(bridge); 141 ii = &sc->ops_iinfo; 142 if (ii->opi_imapsz > 0) { 143 pintr = intpin; 144 if (ofw_bus_lookup_imap(ofw_bus_get_node(dev), ii, ®, 145 sizeof(reg), &pintr, sizeof(pintr), &mintr, sizeof(mintr), 146 &iparent, maskbuf)) { 147 /* 148 * If we've found a mapping, return it and don't map 149 * it again on higher levels - that causes problems 150 * in some cases, and never seems to be required. 151 */ 152 return (MAP_IRQ(iparent, mintr)); 153 } 154 } else if (intpin >= 1 && intpin <= 4) { 155 /* 156 * When an interrupt map is missing, we need to do the 157 * standard PCI swizzle and continue mapping at the parent. 158 */ 159 return (pcib_route_interrupt(bridge, dev, intpin)); 160 } 161 return (PCIB_ROUTE_INTERRUPT(device_get_parent(device_get_parent( 162 bridge)), bridge, intpin)); 163 } 164 165