1 /* $NetBSD: ppb.c,v 1.15 1997/08/30 06:53:58 mycroft Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Christopher G. Demetriou. 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 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Christopher G. Demetriou 17 * for the NetBSD Project. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * XXX NOTE: 35 * XXX PROPER OPERATION OF DEVICES BEHIND PPB'S WHICH USE INTERRUPTS 36 * XXX ON SYSTEMS OTHER THAN THE i386 IS NOT POSSIBLE AT THIS TIME. 37 * XXX There needs to be some support for 'swizzling' the interrupt 38 * XXX pin. In general, pci_map_int() has to have a different 39 * XXX interface. 40 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/device.h> 46 47 #include <dev/pci/pcireg.h> 48 #include <dev/pci/pcivar.h> 49 #include <dev/pci/pcidevs.h> 50 #include <dev/pci/ppbreg.h> 51 52 #ifdef __BROKEN_INDIRECT_CONFIG 53 int ppbmatch __P((struct device *, void *, void *)); 54 #else 55 int ppbmatch __P((struct device *, struct cfdata *, void *)); 56 #endif 57 void ppbattach __P((struct device *, struct device *, void *)); 58 59 struct cfattach ppb_ca = { 60 sizeof(struct device), ppbmatch, ppbattach 61 }; 62 63 struct cfdriver ppb_cd = { 64 NULL, "ppb", DV_DULL 65 }; 66 67 int ppbprint __P((void *, const char *pnp)); 68 69 int 70 ppbmatch(parent, match, aux) 71 struct device *parent; 72 #ifdef __BROKEN_INDIRECT_CONFIG 73 void *match; 74 #else 75 struct cfdata *match; 76 #endif 77 void *aux; 78 { 79 struct pci_attach_args *pa = aux; 80 81 /* 82 * Check the ID register to see that it's a PCI bridge. 83 * If it is, we assume that we can deal with it; it _should_ 84 * work in a standardized way... 85 */ 86 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && 87 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_PCI) 88 return (1); 89 90 return (0); 91 } 92 93 void 94 ppbattach(parent, self, aux) 95 struct device *parent, *self; 96 void *aux; 97 { 98 struct pci_attach_args *pa = aux; 99 pci_chipset_tag_t pc = pa->pa_pc; 100 struct pcibus_attach_args pba; 101 pcireg_t busdata; 102 char devinfo[256]; 103 104 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo); 105 printf(": %s (rev. 0x%02x)\n", devinfo, PCI_REVISION(pa->pa_class)); 106 107 busdata = pci_conf_read(pc, pa->pa_tag, PPB_REG_BUSINFO); 108 109 if (PPB_BUSINFO_SECONDARY(busdata) == 0) { 110 printf("%s: not configured by system firmware\n", 111 self->dv_xname); 112 return; 113 } 114 115 #if 0 116 /* 117 * XXX can't do this, because we're not given our bus number 118 * (we shouldn't need it), and because we've no way to 119 * decompose our tag. 120 */ 121 /* sanity check. */ 122 if (pa->pa_bus != PPB_BUSINFO_PRIMARY(busdata)) 123 panic("ppbattach: bus in tag (%d) != bus in reg (%d)", 124 pa->pa_bus, PPB_BUSINFO_PRIMARY(busdata)); 125 #endif 126 127 /* 128 * Attach the PCI bus than hangs off of it. 129 */ 130 pba.pba_busname = "pci"; 131 pba.pba_iot = pa->pa_iot; 132 pba.pba_memt = pa->pa_memt; 133 pba.pba_dmat = pa->pa_dmat; 134 pba.pba_pc = pc; 135 pba.pba_flags = pa->pa_flags; 136 pba.pba_bus = PPB_BUSINFO_SECONDARY(busdata); 137 pba.pba_intrswiz = pa->pa_intrswiz; 138 pba.pba_intrtag = pa->pa_intrtag; 139 140 config_found(self, &pba, ppbprint); 141 } 142 143 int 144 ppbprint(aux, pnp) 145 void *aux; 146 const char *pnp; 147 { 148 struct pcibus_attach_args *pba = aux; 149 150 /* only PCIs can attach to PPBs; easy. */ 151 if (pnp) 152 printf("pci at %s", pnp); 153 printf(" bus %d", pba->pba_bus); 154 return (UNCONF); 155 } 156