1 /* $NetBSD: pcib.c,v 1.14 2026/06/30 22:28:00 rkujawa Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: pcib.c,v 1.14 2026/06/30 22:28:00 rkujawa Exp $"); 34 35 #include "isa.h" 36 #include "isadma.h" 37 38 #include <sys/types.h> 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/device.h> 42 43 #include <sys/bus.h> 44 45 #include <dev/isa/isavar.h> 46 47 #include <dev/pci/pcivar.h> 48 #include <dev/pci/pcireg.h> 49 50 #include <dev/pci/pcidevs.h> 51 52 int pcibmatch(device_t, cfdata_t, void *); 53 void pcibattach(device_t, device_t, void *); 54 55 struct pcib_softc { 56 device_t sc_dev; 57 struct powerpc_isa_chipset *sc_chipset; 58 }; 59 60 extern struct powerpc_isa_chipset genppc_ict; 61 extern struct genppc_pci_chipset *genppc_pct; 62 63 CFATTACH_DECL_NEW(pcib, sizeof(struct pcib_softc), 64 pcibmatch, pcibattach, NULL, NULL); 65 66 void pcib_callback(device_t); 67 68 int 69 pcibmatch(device_t parent, cfdata_t cf, void *aux) 70 { 71 struct pci_attach_args *pa = aux; 72 73 /* 74 * Match PCI-ISA bridge. 75 */ 76 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && 77 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA) { 78 return (1); 79 } 80 81 /* 82 * some special cases: 83 */ 84 switch (PCI_VENDOR(pa->pa_id)) { 85 case PCI_VENDOR_INTEL: 86 switch (PCI_PRODUCT(pa->pa_id)) { 87 case PCI_PRODUCT_INTEL_SIO: 88 /* 89 * The Intel SIO identifies itself as a 90 * miscellaneous prehistoric. 91 */ 92 return (1); 93 } 94 break; 95 } 96 97 return (0); 98 } 99 100 void 101 pcibattach(device_t parent, device_t self, void *aux) 102 { 103 struct pci_attach_args *pa = aux; 104 struct pcib_softc *sc = device_private(self); 105 char devinfo[256]; 106 u_int32_t v; 107 int lvlmask = 0; 108 109 sc->sc_dev = self; 110 111 /* 112 * Just print out a description and defer configuration 113 * until all PCI devices have been attached. 114 */ 115 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 116 aprint_normal(": %s (rev. 0x%02x)\n", devinfo, 117 PCI_REVISION(pa->pa_class)); 118 119 v = pci_conf_read(pa->pa_pc, pa->pa_tag, 0x40); 120 if ((v & 0x20) == 0) { 121 aprint_verbose_dev(self, "PIRQ[0-3] not used\n"); 122 } else { 123 v = pci_conf_read(pa->pa_pc, pa->pa_tag, 0x60); 124 if ((v & 0x80808080) == 0x80808080) { 125 aprint_verbose_dev(self, "PIRQ[0-3] disabled\n"); 126 } else { 127 int i; 128 aprint_verbose("%s:", device_xname(self)); 129 for (i = 0; i < 4; i++, v >>= 8) { 130 if ((v & 0x80) == 0 && (v & 0x0f) != 0) { 131 aprint_verbose(" PIRQ[%d]=%d", i, 132 v & 0x0f); 133 lvlmask |= (1 << (v & 0x0f)); 134 } 135 } 136 aprint_verbose("\n"); 137 } 138 } 139 140 /* 141 * If we have an 83C553F-G sitting on a RAVEN host bridge, 142 * then we need to rewire some interrupts. 143 * The IDE Interrupt Routing Control Register lives at 0x43, 144 * and defaults to 0xEF, which means the primary controller 145 * interrupts on ivr-14, and the secondary on ivr-15. We 146 * reset it to 0xEE to fire them both at ivr-14. 147 * We have to rewrite the interrupt map, because the bridge map told 148 * us that the interrupt is MPIC 0, which is the bridge intr for 149 * the 8259. 150 * Additionally, sometimes the PCI Interrupt Routing Control Register 151 * is improperly initialized, causing all sorts of weird interrupt 152 * issues on the machine. The manual says it should default to 153 * 0000h (index 45-44h) however it would appear that PPCBUG is 154 * setting it up differently. Reset it to 0000h. 155 */ 156 157 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SYMPHONY && 158 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SYMPHONY_83C553) { 159 v = pci_conf_read(pa->pa_pc, pa->pa_tag, 0x44) & 0xffff0000; 160 pci_conf_write(pa->pa_pc, pa->pa_tag, 0x44, v); 161 } 162 163 #ifdef prep 164 if (device_getprop_bool(parent, "prep-raven-pchb") && 165 PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SYMPHONY && 166 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SYMPHONY_83C553) { 167 168 prop_dictionary_t dict, devsub; 169 prop_number_t pinsub; 170 struct genppc_pci_chipset_businfo *pbi; 171 172 v = pci_conf_read(pa->pa_pc, pa->pa_tag, 0x40) & 0x00ffffff; 173 v |= 0xee000000; 174 pci_conf_write(pa->pa_pc, pa->pa_tag, 0x40, v); 175 176 pbi = SIMPLEQ_FIRST(&genppc_pct->pc_pbi); 177 dict = prop_dictionary_get(pbi->pbi_properties, 178 "prep-pci-intrmap"); 179 devsub = prop_dictionary_get(dict, "devfunc-11"); 180 pinsub = prop_number_create_integer(14); 181 prop_dictionary_set(devsub, "pin-A", pinsub); 182 prop_object_release(pinsub); 183 aprint_verbose_dev(self, "setting pciide irq to 14\n"); 184 /* irq 14 is level */ 185 lvlmask = 0x0040; 186 } 187 #endif /* prep */ 188 189 config_defer(self, pcib_callback); 190 } 191 192 void 193 pcib_callback(device_t self) 194 { 195 #if NISA > 0 196 struct pcib_softc *sc = device_private(self); 197 struct isabus_attach_args iba; 198 199 /* 200 * Attach the ISA bus behind this bridge. 201 */ 202 memset(&iba, 0, sizeof(iba)); 203 sc->sc_chipset = &genppc_ict; 204 iba.iba_ic = sc->sc_chipset; 205 iba.iba_iot = &genppc_isa_io_space_tag; 206 iba.iba_memt = &genppc_isa_mem_space_tag; 207 #if NISADMA > 0 208 iba.iba_dmat = &isa_bus_dma_tag; 209 #endif 210 isabus_attach(sc->sc_dev, &iba); 211 #endif 212 } 213
Indexes created Sun Oct 25 00:26:45 UTC 2026