ofw_pcib_pci.c revision 186128
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 * $FreeBSD: head/sys/powerpc/ofw/ofw_pcib_pci.c 186128 2008-12-15 15:31:10Z nwhitehorn $ 28 */ 29 30#include <sys/param.h> 31#include <sys/module.h> 32#include <sys/bus.h> 33#include <sys/malloc.h> 34#include <sys/kernel.h> 35 36#include <dev/ofw/openfirm.h> 37#include <dev/ofw/ofw_pci.h> 38#include <dev/ofw/ofw_bus.h> 39#include <dev/ofw/ofw_bus_subr.h> 40 41#include <dev/pci/pcivar.h> 42#include <dev/pci/pcireg.h> 43#include <dev/pci/pcib_private.h> 44 45#include "pcib_if.h" 46 47static int ofw_pcib_pci_probe(device_t bus); 48static int ofw_pcib_pci_attach(device_t bus); 49static phandle_t ofw_pcib_pci_get_node(device_t bus, device_t dev); 50static int ofw_pcib_pci_route_interrupt(device_t bridge, device_t dev, 51 int intpin); 52 53static device_method_t ofw_pcib_pci_methods[] = { 54 /* Device interface */ 55 DEVMETHOD(device_probe, ofw_pcib_pci_probe), 56 DEVMETHOD(device_attach, ofw_pcib_pci_attach), 57 DEVMETHOD(device_shutdown, bus_generic_shutdown), 58 DEVMETHOD(device_suspend, bus_generic_suspend), 59 DEVMETHOD(device_resume, bus_generic_resume), 60 61 /* Bus interface */ 62 DEVMETHOD(bus_print_child, bus_generic_print_child), 63 DEVMETHOD(bus_read_ivar, pcib_read_ivar), 64 DEVMETHOD(bus_write_ivar, pcib_write_ivar), 65 DEVMETHOD(bus_alloc_resource, pcib_alloc_resource), 66 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 67 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 68 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 69 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 70 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 71 72 /* pcib interface */ 73 DEVMETHOD(pcib_maxslots, pcib_maxslots), 74 DEVMETHOD(pcib_read_config, pcib_read_config), 75 DEVMETHOD(pcib_write_config, pcib_write_config), 76 DEVMETHOD(pcib_route_interrupt, ofw_pcib_pci_route_interrupt), 77 78 /* ofw_bus interface */ 79 DEVMETHOD(ofw_bus_get_node, ofw_pcib_pci_get_node), 80 81 {0, 0} 82}; 83 84static devclass_t pcib_devclass; 85 86struct ofw_pcib_softc { 87 /* 88 * This is here so that we can use pci bridge methods, too - the 89 * generic routines only need the dev, secbus and subbus members 90 * filled. 91 */ 92 struct pcib_softc ops_pcib_sc; 93 phandle_t ops_node; 94 struct ofw_bus_iinfo ops_iinfo; 95}; 96 97 98DEFINE_CLASS_0(pcib, ofw_pcib_pci_driver, ofw_pcib_pci_methods, 99 sizeof(struct ofw_pcib_softc)); 100DRIVER_MODULE(ofw_pcib, pci, ofw_pcib_pci_driver, pcib_devclass, 0, 0); 101 102static int 103ofw_pcib_pci_probe(device_t dev) 104{ 105 106 if ((pci_get_class(dev) != PCIC_BRIDGE) || 107 (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) { 108 return (ENXIO); 109 } 110 111 if (ofw_bus_get_node(dev) == 0) 112 return (ENXIO); 113 114 device_set_desc(dev, "OFW PCI-PCI bridge"); 115 return (0); 116} 117 118static int 119ofw_pcib_pci_attach(device_t dev) 120{ 121 struct ofw_pcib_softc *sc; 122 123 sc = device_get_softc(dev); 124 sc->ops_pcib_sc.dev = dev; 125 sc->ops_node = ofw_bus_get_node(dev); 126 127 ofw_bus_setup_iinfo(sc->ops_node, &sc->ops_iinfo, 128 sizeof(cell_t)); 129 130 pcib_attach_common(dev); 131 132 device_add_child(dev, "pci", -1); 133 134 return (bus_generic_attach(dev)); 135} 136 137static phandle_t 138ofw_pcib_pci_get_node(device_t bridge, device_t dev) 139{ 140 /* We have only one child, the PCI bus, so pass it our node */ 141 142 return (ofw_bus_get_node(bridge)); 143} 144 145static int 146ofw_pcib_pci_route_interrupt(device_t bridge, device_t dev, int intpin) 147{ 148 struct ofw_pcib_softc *sc; 149 struct ofw_bus_iinfo *ii; 150 struct ofw_pci_register reg; 151 cell_t pintr, mintr; 152 uint8_t maskbuf[sizeof(reg) + sizeof(pintr)]; 153 154 sc = device_get_softc(bridge); 155 ii = &sc->ops_iinfo; 156 if (ii->opi_imapsz > 0) { 157 pintr = intpin; 158 if (ofw_bus_lookup_imap(ofw_bus_get_node(dev), ii, ®, 159 sizeof(reg), &pintr, sizeof(pintr), &mintr, sizeof(mintr), 160 maskbuf)) { 161 /* 162 * If we've found a mapping, return it and don't map 163 * it again on higher levels - that causes problems 164 * in some cases, and never seems to be required. 165 */ 166 return (mintr); 167 } 168 } else if (intpin >= 1 && intpin <= 4) { 169 /* 170 * When an interrupt map is missing, we need to do the 171 * standard PCI swizzle and continue mapping at the parent. 172 */ 173 return (pcib_route_interrupt(bridge, dev, intpin)); 174 } 175 return (PCIB_ROUTE_INTERRUPT(device_get_parent(device_get_parent( 176 bridge)), bridge, intpin)); 177} 178 179