Annotation of sys/dev/pci/ppb.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: ppb.c,v 1.19 2007/05/21 22:10:45 kettenis Exp $ */
! 2: /* $NetBSD: ppb.c,v 1.16 1997/06/06 23:48:05 thorpej Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
! 6: *
! 7: * Redistribution and use in source and binary forms, with or without
! 8: * modification, are permitted provided that the following conditions
! 9: * are met:
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: * 3. All advertising materials mentioning features or use of this software
! 16: * must display the following acknowledgement:
! 17: * This product includes software developed by Christopher G. Demetriou
! 18: * for the NetBSD Project.
! 19: * 4. The name of the author may not be used to endorse or promote products
! 20: * derived from this software without specific prior written permission
! 21: *
! 22: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 23: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 24: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 25: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 26: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 27: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 28: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 29: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 30: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 31: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 32: */
! 33:
! 34: #include <sys/param.h>
! 35: #include <sys/systm.h>
! 36: #include <sys/kernel.h>
! 37: #include <sys/device.h>
! 38:
! 39: #include <dev/pci/pcireg.h>
! 40: #include <dev/pci/pcivar.h>
! 41: #include <dev/pci/pcidevs.h>
! 42: #include <dev/pci/ppbreg.h>
! 43:
! 44: struct ppb_softc {
! 45: struct device sc_dev; /* generic device glue */
! 46: pci_chipset_tag_t sc_pc; /* our PCI chipset... */
! 47: pcitag_t sc_tag; /* ...and tag. */
! 48: pci_intr_handle_t sc_ih[4];
! 49: };
! 50:
! 51: int ppbmatch(struct device *, void *, void *);
! 52: void ppbattach(struct device *, struct device *, void *);
! 53:
! 54: struct cfattach ppb_ca = {
! 55: sizeof(struct ppb_softc), ppbmatch, ppbattach
! 56: };
! 57:
! 58: struct cfdriver ppb_cd = {
! 59: NULL, "ppb", DV_DULL
! 60: };
! 61:
! 62: int ppbprint(void *, const char *pnp);
! 63:
! 64: int
! 65: ppbmatch(struct device *parent, void *match, void *aux)
! 66: {
! 67: struct pci_attach_args *pa = aux;
! 68:
! 69: /*
! 70: * This device is mislabeled. It is not a PCI bridge.
! 71: */
! 72: if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_VIATECH &&
! 73: PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_VIATECH_VT82C586_PWR)
! 74: return (0);
! 75: /*
! 76: * Check the ID register to see that it's a PCI bridge.
! 77: * If it is, we assume that we can deal with it; it _should_
! 78: * work in a standardized way...
! 79: */
! 80: if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
! 81: PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_PCI)
! 82: return (1);
! 83:
! 84: return (0);
! 85: }
! 86:
! 87: void
! 88: ppbattach(struct device *parent, struct device *self, void *aux)
! 89: {
! 90: struct ppb_softc *sc = (void *) self;
! 91: struct pci_attach_args *pa = aux;
! 92: pci_chipset_tag_t pc = pa->pa_pc;
! 93: struct pcibus_attach_args pba;
! 94: pcireg_t busdata;
! 95: int pin;
! 96:
! 97: printf("\n");
! 98:
! 99: sc->sc_pc = pc;
! 100: sc->sc_tag = pa->pa_tag;
! 101:
! 102: busdata = pci_conf_read(pc, pa->pa_tag, PPB_REG_BUSINFO);
! 103:
! 104: if (PPB_BUSINFO_SECONDARY(busdata) == 0) {
! 105: printf("%s: not configured by system firmware\n",
! 106: self->dv_xname);
! 107: return;
! 108: }
! 109:
! 110: for (pin = PCI_INTERRUPT_PIN_A; pin <= PCI_INTERRUPT_PIN_D; pin++) {
! 111: pa->pa_intrpin = pa->pa_rawintrpin = pin;
! 112: pa->pa_intrline = 0;
! 113: pci_intr_map(pa, &sc->sc_ih[pin - PCI_INTERRUPT_PIN_A]);
! 114: }
! 115:
! 116: #if 0
! 117: /*
! 118: * XXX can't do this, because we're not given our bus number
! 119: * (we shouldn't need it), and because we've no way to
! 120: * decompose our tag.
! 121: */
! 122: /* sanity check. */
! 123: if (pa->pa_bus != PPB_BUSINFO_PRIMARY(busdata))
! 124: panic("ppbattach: bus in tag (%d) != bus in reg (%d)",
! 125: pa->pa_bus, PPB_BUSINFO_PRIMARY(busdata));
! 126: #endif
! 127:
! 128: /*
! 129: * Attach the PCI bus that hangs off of it.
! 130: *
! 131: * XXX Don't pass-through Memory Read Multiple. Should we?
! 132: * XXX Consult the spec...
! 133: */
! 134: pba.pba_busname = "pci";
! 135: pba.pba_iot = pa->pa_iot;
! 136: pba.pba_memt = pa->pa_memt;
! 137: pba.pba_dmat = pa->pa_dmat;
! 138: pba.pba_pc = pc;
! 139: #if 0
! 140: pba.pba_flags = pa->pa_flags & ~PCI_FLAGS_MRM_OKAY;
! 141: #endif
! 142: pba.pba_domain = pa->pa_domain;
! 143: pba.pba_bus = PPB_BUSINFO_SECONDARY(busdata);
! 144: pba.pba_bridgeih = sc->sc_ih;
! 145: pba.pba_bridgetag = &sc->sc_tag;
! 146: pba.pba_intrswiz = pa->pa_intrswiz;
! 147: pba.pba_intrtag = pa->pa_intrtag;
! 148:
! 149: config_found(self, &pba, ppbprint);
! 150: }
! 151:
! 152: int
! 153: ppbprint(void *aux, const char *pnp)
! 154: {
! 155: struct pcibus_attach_args *pba = aux;
! 156:
! 157: /* only PCIs can attach to PPBs; easy. */
! 158: if (pnp)
! 159: printf("pci at %s", pnp);
! 160: printf(" bus %d", pba->pba_bus);
! 161: return (UNCONF);
! 162: }
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