1 /*- 2 * Copyright 2015 Justin Hibbits 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * From: FreeBSD: src/sys/powerpc/mpc85xx/pci_ocp.c,v 1.9 2010/03/23 23:46:28 marcel 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/ktr.h> 37 #include <sys/sockio.h> 38 #include <sys/mbuf.h> 39 #include <sys/malloc.h> 40 #include <sys/kernel.h> 41 #include <sys/module.h> 42 #include <sys/socket.h> 43 #include <sys/queue.h> 44 #include <sys/bus.h> 45 #include <sys/lock.h> 46 #include <sys/mutex.h> 47 #include <sys/rman.h> 48 #include <sys/endian.h> 49 50 #include <vm/vm.h> 51 #include <vm/pmap.h> 52 53 #include <dev/ofw/openfirm.h> 54 #include <dev/ofw/ofw_pci.h> 55 #include <dev/ofw/ofw_bus.h> 56 #include <dev/ofw/ofw_bus_subr.h> 57 58 #include <dev/pci/pcivar.h> 59 #include <dev/pci/pcireg.h> 60 #include <dev/pci/pcib_private.h> 61 62 #include <machine/intr_machdep.h> 63 64 #include "pcib_if.h" 65 66 struct fsl_pcib_softc { 67 /* 68 * This is here so that we can use pci bridge methods, too - the 69 * generic routines only need the dev, secbus and subbus members 70 * filled. 71 */ 72 struct pcib_softc ops_pcib_sc; 73 phandle_t ops_node; 74 struct ofw_bus_iinfo ops_iinfo; 75 }; 76 77 static int 78 fsl_pcib_rc_probe(device_t dev) 79 { 80 81 if (pci_get_vendor(dev) != 0x1957) 82 return (ENXIO); 83 if (pci_get_progif(dev) != 0) 84 return (ENXIO); 85 if (pci_get_class(dev) != PCIC_PROCESSOR) 86 return (ENXIO); 87 if (pci_get_subclass(dev) != PCIS_PROCESSOR_POWERPC) 88 return (ENXIO); 89 90 return (BUS_PROBE_DEFAULT); 91 } 92 93 static int 94 fsl_pcib_rc_attach(device_t dev) 95 { 96 struct fsl_pcib_softc *sc; 97 98 sc = device_get_softc(dev); 99 sc->ops_pcib_sc.dev = dev; 100 sc->ops_node = ofw_bus_get_node(dev); 101 102 ofw_bus_setup_iinfo(sc->ops_node, &sc->ops_iinfo, 103 sizeof(cell_t)); 104 105 pcib_attach_common(dev); 106 return (pcib_attach_child(dev)); 107 } 108 109 static phandle_t 110 fsl_pcib_rc_get_node(device_t bridge, device_t dev) 111 { 112 /* We have only one child, the PCI bus, so pass it our node */ 113 114 return (ofw_bus_get_node(bridge)); 115 } 116 117 static int 118 fsl_pcib_rc_route_interrupt(device_t bridge, device_t dev, int intpin) 119 { 120 struct fsl_pcib_softc *sc; 121 struct ofw_bus_iinfo *ii; 122 struct ofw_pci_register reg; 123 cell_t pintr, mintr[2]; 124 int intrcells; 125 phandle_t iparent; 126 127 sc = device_get_softc(bridge); 128 ii = &sc->ops_iinfo; 129 if (ii->opi_imapsz > 0) { 130 pintr = intpin; 131 132 /* Fabricate imap information if this isn't an OFW device */ 133 bzero(®, sizeof(reg)); 134 reg.phys_hi = (pci_get_bus(dev) << OFW_PCI_PHYS_HI_BUSSHIFT) | 135 (pci_get_slot(dev) << OFW_PCI_PHYS_HI_DEVICESHIFT) | 136 (pci_get_function(dev) << OFW_PCI_PHYS_HI_FUNCTIONSHIFT); 137 138 intrcells = ofw_bus_lookup_imap(ofw_bus_get_node(dev), ii, ®, 139 sizeof(reg), &pintr, sizeof(pintr), mintr, sizeof(mintr), 140 &iparent); 141 if (intrcells) { 142 /* 143 * If we've found a mapping, return it and don't map 144 * it again on higher levels - that causes problems 145 * in some cases, and never seems to be required. 146 */ 147 mintr[0] = ofw_bus_map_intr(dev, iparent, intrcells, 148 mintr); 149 return (mintr[0]); 150 } 151 } else if (intpin >= 1 && intpin <= 4) { 152 /* 153 * When an interrupt map is missing, we need to do the 154 * standard PCI swizzle and continue mapping at the parent. 155 */ 156 return (pcib_route_interrupt(bridge, dev, intpin)); 157 } 158 return (PCIB_ROUTE_INTERRUPT(device_get_parent(device_get_parent( 159 bridge)), bridge, intpin)); 160 } 161 162 static device_method_t fsl_pcib_rc_methods[] = { 163 DEVMETHOD(device_probe, fsl_pcib_rc_probe), 164 DEVMETHOD(device_attach, fsl_pcib_rc_attach), 165 166 /* pcib interface */ 167 DEVMETHOD(pcib_route_interrupt, fsl_pcib_rc_route_interrupt), 168 DEVMETHOD(pcib_request_feature, pcib_request_feature_allow), 169 170 /* ofw_bus interface */ 171 DEVMETHOD(ofw_bus_get_node, fsl_pcib_rc_get_node), 172 DEVMETHOD_END 173 }; 174 175 static devclass_t fsl_pcib_rc_devclass; 176 DEFINE_CLASS_1(pcib, fsl_pcib_rc_driver, fsl_pcib_rc_methods, 177 sizeof(struct fsl_pcib_softc), pcib_driver); 178 DRIVER_MODULE(rcpcib, pci, fsl_pcib_rc_driver, fsl_pcib_rc_devclass, 0, 0); 179