ofw_pcib_pci.c revision 186128
1109001Sbenno/*- 2109001Sbenno * Copyright (c) 2000 Michael Smith 3109001Sbenno * Copyright (c) 2000 BSDi 4109001Sbenno * All rights reserved. 5109001Sbenno * 6109001Sbenno * Redistribution and use in source and binary forms, with or without 7109001Sbenno * modification, are permitted provided that the following conditions 8109001Sbenno * are met: 9109001Sbenno * 1. Redistributions of source code must retain the above copyright 10109001Sbenno * notice, this list of conditions and the following disclaimer. 11109001Sbenno * 2. Redistributions in binary form must reproduce the above copyright 12109001Sbenno * notice, this list of conditions and the following disclaimer in the 13109001Sbenno * documentation and/or other materials provided with the distribution. 14109001Sbenno * 15109001Sbenno * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16109001Sbenno * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17109001Sbenno * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18109001Sbenno * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19109001Sbenno * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20109001Sbenno * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21109001Sbenno * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22109001Sbenno * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23109001Sbenno * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24109001Sbenno * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25109001Sbenno * SUCH DAMAGE. 26109001Sbenno * 27109001Sbenno * $FreeBSD: head/sys/powerpc/ofw/ofw_pcib_pci.c 186128 2008-12-15 15:31:10Z nwhitehorn $ 28109001Sbenno */ 29109001Sbenno 30109001Sbenno#include <sys/param.h> 31131102Sgrehan#include <sys/module.h> 32109001Sbenno#include <sys/bus.h> 33109001Sbenno#include <sys/malloc.h> 34109001Sbenno#include <sys/kernel.h> 35109001Sbenno 36109001Sbenno#include <dev/ofw/openfirm.h> 37109001Sbenno#include <dev/ofw/ofw_pci.h> 38183882Snwhitehorn#include <dev/ofw/ofw_bus.h> 39186128Snwhitehorn#include <dev/ofw/ofw_bus_subr.h> 40109001Sbenno 41119291Simp#include <dev/pci/pcivar.h> 42119291Simp#include <dev/pci/pcireg.h> 43119291Simp#include <dev/pci/pcib_private.h> 44109001Sbenno 45109001Sbenno#include "pcib_if.h" 46109001Sbenno 47109001Sbennostatic int ofw_pcib_pci_probe(device_t bus); 48109001Sbennostatic int ofw_pcib_pci_attach(device_t bus); 49183882Snwhitehornstatic phandle_t ofw_pcib_pci_get_node(device_t bus, device_t dev); 50186128Snwhitehornstatic int ofw_pcib_pci_route_interrupt(device_t bridge, device_t dev, 51186128Snwhitehorn int intpin); 52109001Sbenno 53109001Sbennostatic device_method_t ofw_pcib_pci_methods[] = { 54109001Sbenno /* Device interface */ 55109001Sbenno DEVMETHOD(device_probe, ofw_pcib_pci_probe), 56109001Sbenno DEVMETHOD(device_attach, ofw_pcib_pci_attach), 57109001Sbenno DEVMETHOD(device_shutdown, bus_generic_shutdown), 58109001Sbenno DEVMETHOD(device_suspend, bus_generic_suspend), 59109001Sbenno DEVMETHOD(device_resume, bus_generic_resume), 60109001Sbenno 61109001Sbenno /* Bus interface */ 62109001Sbenno DEVMETHOD(bus_print_child, bus_generic_print_child), 63109001Sbenno DEVMETHOD(bus_read_ivar, pcib_read_ivar), 64109001Sbenno DEVMETHOD(bus_write_ivar, pcib_write_ivar), 65109001Sbenno DEVMETHOD(bus_alloc_resource, pcib_alloc_resource), 66109001Sbenno DEVMETHOD(bus_release_resource, bus_generic_release_resource), 67109001Sbenno DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 68109001Sbenno DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 69109001Sbenno DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 70109001Sbenno DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 71109001Sbenno 72109001Sbenno /* pcib interface */ 73109001Sbenno DEVMETHOD(pcib_maxslots, pcib_maxslots), 74109001Sbenno DEVMETHOD(pcib_read_config, pcib_read_config), 75109001Sbenno DEVMETHOD(pcib_write_config, pcib_write_config), 76186128Snwhitehorn DEVMETHOD(pcib_route_interrupt, ofw_pcib_pci_route_interrupt), 77109001Sbenno 78183882Snwhitehorn /* ofw_bus interface */ 79183882Snwhitehorn DEVMETHOD(ofw_bus_get_node, ofw_pcib_pci_get_node), 80183882Snwhitehorn 81109001Sbenno {0, 0} 82109001Sbenno}; 83109001Sbenno 84154079Sjhbstatic devclass_t pcib_devclass; 85109001Sbenno 86186128Snwhitehornstruct ofw_pcib_softc { 87186128Snwhitehorn /* 88186128Snwhitehorn * This is here so that we can use pci bridge methods, too - the 89186128Snwhitehorn * generic routines only need the dev, secbus and subbus members 90186128Snwhitehorn * filled. 91186128Snwhitehorn */ 92186128Snwhitehorn struct pcib_softc ops_pcib_sc; 93186128Snwhitehorn phandle_t ops_node; 94186128Snwhitehorn struct ofw_bus_iinfo ops_iinfo; 95186128Snwhitehorn}; 96186128Snwhitehorn 97186128Snwhitehorn 98154079SjhbDEFINE_CLASS_0(pcib, ofw_pcib_pci_driver, ofw_pcib_pci_methods, 99186128Snwhitehorn sizeof(struct ofw_pcib_softc)); 100109001SbennoDRIVER_MODULE(ofw_pcib, pci, ofw_pcib_pci_driver, pcib_devclass, 0, 0); 101109001Sbenno 102109001Sbennostatic int 103109001Sbennoofw_pcib_pci_probe(device_t dev) 104109001Sbenno{ 105109001Sbenno 106109001Sbenno if ((pci_get_class(dev) != PCIC_BRIDGE) || 107109001Sbenno (pci_get_subclass(dev) != PCIS_BRIDGE_PCI)) { 108109001Sbenno return (ENXIO); 109109001Sbenno } 110183882Snwhitehorn 111183882Snwhitehorn if (ofw_bus_get_node(dev) == 0) 112109001Sbenno return (ENXIO); 113109001Sbenno 114183882Snwhitehorn device_set_desc(dev, "OFW PCI-PCI bridge"); 115183882Snwhitehorn return (0); 116109001Sbenno} 117109001Sbenno 118109001Sbennostatic int 119109001Sbennoofw_pcib_pci_attach(device_t dev) 120109001Sbenno{ 121186128Snwhitehorn struct ofw_pcib_softc *sc; 122186128Snwhitehorn 123186128Snwhitehorn sc = device_get_softc(dev); 124186128Snwhitehorn sc->ops_pcib_sc.dev = dev; 125186128Snwhitehorn sc->ops_node = ofw_bus_get_node(dev); 126186128Snwhitehorn 127186128Snwhitehorn ofw_bus_setup_iinfo(sc->ops_node, &sc->ops_iinfo, 128186128Snwhitehorn sizeof(cell_t)); 129186128Snwhitehorn 130109001Sbenno pcib_attach_common(dev); 131109001Sbenno 132109001Sbenno device_add_child(dev, "pci", -1); 133109001Sbenno 134109001Sbenno return (bus_generic_attach(dev)); 135109001Sbenno} 136183882Snwhitehorn 137186128Snwhitehornstatic phandle_t 138183882Snwhitehornofw_pcib_pci_get_node(device_t bridge, device_t dev) 139183882Snwhitehorn{ 140183882Snwhitehorn /* We have only one child, the PCI bus, so pass it our node */ 141183882Snwhitehorn 142183882Snwhitehorn return (ofw_bus_get_node(bridge)); 143183882Snwhitehorn} 144183882Snwhitehorn 145186128Snwhitehornstatic int 146186128Snwhitehornofw_pcib_pci_route_interrupt(device_t bridge, device_t dev, int intpin) 147186128Snwhitehorn{ 148186128Snwhitehorn struct ofw_pcib_softc *sc; 149186128Snwhitehorn struct ofw_bus_iinfo *ii; 150186128Snwhitehorn struct ofw_pci_register reg; 151186128Snwhitehorn cell_t pintr, mintr; 152186128Snwhitehorn uint8_t maskbuf[sizeof(reg) + sizeof(pintr)]; 153186128Snwhitehorn 154186128Snwhitehorn sc = device_get_softc(bridge); 155186128Snwhitehorn ii = &sc->ops_iinfo; 156186128Snwhitehorn if (ii->opi_imapsz > 0) { 157186128Snwhitehorn pintr = intpin; 158186128Snwhitehorn if (ofw_bus_lookup_imap(ofw_bus_get_node(dev), ii, ®, 159186128Snwhitehorn sizeof(reg), &pintr, sizeof(pintr), &mintr, sizeof(mintr), 160186128Snwhitehorn maskbuf)) { 161186128Snwhitehorn /* 162186128Snwhitehorn * If we've found a mapping, return it and don't map 163186128Snwhitehorn * it again on higher levels - that causes problems 164186128Snwhitehorn * in some cases, and never seems to be required. 165186128Snwhitehorn */ 166186128Snwhitehorn return (mintr); 167186128Snwhitehorn } 168186128Snwhitehorn } else if (intpin >= 1 && intpin <= 4) { 169186128Snwhitehorn /* 170186128Snwhitehorn * When an interrupt map is missing, we need to do the 171186128Snwhitehorn * standard PCI swizzle and continue mapping at the parent. 172186128Snwhitehorn */ 173186128Snwhitehorn return (pcib_route_interrupt(bridge, dev, intpin)); 174186128Snwhitehorn } 175186128Snwhitehorn return (PCIB_ROUTE_INTERRUPT(device_get_parent(device_get_parent( 176186128Snwhitehorn bridge)), bridge, intpin)); 177186128Snwhitehorn} 178186128Snwhitehorn 179