ppb.c revision 1.34.22.6
1 /* $NetBSD: ppb.c,v 1.34.22.6 2007/10/04 18:12:06 joerg Exp $ */ 2 3 /* 4 * Copyright (c) 1996, 1998 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 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: ppb.c,v 1.34.22.6 2007/10/04 18:12:06 joerg Exp $"); 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/kernel.h> 39 #include <sys/device.h> 40 41 #include <dev/pci/pcireg.h> 42 #include <dev/pci/pcivar.h> 43 #include <dev/pci/ppbreg.h> 44 #include <dev/pci/pcidevs.h> 45 46 struct ppb_softc { 47 struct device sc_dev; /* generic device glue */ 48 pci_chipset_tag_t sc_pc; /* our PCI chipset... */ 49 pcitag_t sc_tag; /* ...and tag. */ 50 51 pcireg_t sc_pciconfext[48]; 52 }; 53 54 static void ppb_resume(device_t); 55 static void ppb_suspend(device_t); 56 57 static int 58 ppbmatch(struct device *parent, struct cfdata *match, 59 void *aux) 60 { 61 struct pci_attach_args *pa = aux; 62 63 /* 64 * Check the ID register to see that it's a PCI bridge. 65 * If it is, we assume that we can deal with it; it _should_ 66 * work in a standardized way... 67 */ 68 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE && 69 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_PCI) 70 return (1); 71 72 return (0); 73 } 74 75 static void 76 ppbattach(struct device *parent, struct device *self, void *aux) 77 { 78 struct ppb_softc *sc = (void *) self; 79 struct pci_attach_args *pa = aux; 80 pci_chipset_tag_t pc = pa->pa_pc; 81 struct pcibus_attach_args pba; 82 pcireg_t busdata; 83 char devinfo[256]; 84 pnp_status_t pnp_status; 85 86 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 87 aprint_normal(": %s (rev. 0x%02x)\n", devinfo, 88 PCI_REVISION(pa->pa_class)); 89 aprint_naive("\n"); 90 91 sc->sc_pc = pc; 92 sc->sc_tag = pa->pa_tag; 93 94 busdata = pci_conf_read(pc, pa->pa_tag, PPB_REG_BUSINFO); 95 96 if (PPB_BUSINFO_SECONDARY(busdata) == 0) { 97 aprint_normal("%s: not configured by system firmware\n", 98 self->dv_xname); 99 return; 100 } 101 102 #if 0 103 /* 104 * XXX can't do this, because we're not given our bus number 105 * (we shouldn't need it), and because we've no way to 106 * decompose our tag. 107 */ 108 /* sanity check. */ 109 if (pa->pa_bus != PPB_BUSINFO_PRIMARY(busdata)) 110 panic("ppbattach: bus in tag (%d) != bus in reg (%d)", 111 pa->pa_bus, PPB_BUSINFO_PRIMARY(busdata)); 112 #endif 113 114 pnp_status = pci_generic_power_register(self, pa->pa_pc, pa->pa_tag, 115 ppb_suspend, ppb_resume); 116 if (pnp_status != PNP_STATUS_SUCCESS) { 117 aprint_error("%s: couldn't establish power handler\n", 118 device_xname(self)); 119 } 120 121 /* 122 * Attach the PCI bus than hangs off of it. 123 * 124 * XXX Don't pass-through Memory Read Multiple. Should we? 125 * XXX Consult the spec... 126 */ 127 pba.pba_iot = pa->pa_iot; 128 pba.pba_memt = pa->pa_memt; 129 pba.pba_dmat = pa->pa_dmat; 130 pba.pba_dmat64 = pa->pa_dmat64; 131 pba.pba_pc = pc; 132 pba.pba_flags = pa->pa_flags & ~PCI_FLAGS_MRM_OKAY; 133 pba.pba_bus = PPB_BUSINFO_SECONDARY(busdata); 134 pba.pba_bridgetag = &sc->sc_tag; 135 pba.pba_intrswiz = pa->pa_intrswiz; 136 pba.pba_intrtag = pa->pa_intrtag; 137 138 config_found_ia(self, "pcibus", &pba, pcibusprint); 139 } 140 141 static void 142 ppb_resume(device_t dv) 143 { 144 struct ppb_softc *sc = device_private(dv); 145 int off; 146 pcireg_t val; 147 148 for (off = 0x40; off <= 0xff; off += 4) { 149 val = pci_conf_read(sc->sc_pc, sc->sc_tag, off); 150 if (val != sc->sc_pciconfext[(off - 0x40) / 4]) 151 pci_conf_write(sc->sc_pc, sc->sc_tag, off, 152 sc->sc_pciconfext[(off - 0x40)/4]); 153 } 154 } 155 156 static void 157 ppb_suspend(device_t dv) 158 { 159 struct ppb_softc *sc = device_private(dv); 160 int off; 161 162 for (off = 0x40; off <= 0xff; off += 4) 163 sc->sc_pciconfext[(off - 0x40) / 4] = 164 pci_conf_read(sc->sc_pc, sc->sc_tag, off); 165 } 166 167 CFATTACH_DECL(ppb, sizeof(struct ppb_softc), 168 ppbmatch, ppbattach, NULL, NULL); 169
Indexes created Tue Oct 14 11:09:46 GMT 2025