FreeBSD/Linux Kernel Cross Reference
sys/sparc64/pci/ofw_pcib_subr.c

     /*-
      * Copyright (c) 2003 by Thomas Moestl <tmm@FreeBSD.org>
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
     * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
     * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
     * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     * $FreeBSD: releng/6.0/sys/sparc64/pci/ofw_pcib_subr.c 133589 2004-08-12 17:41:33Z marius $
     */
    
    #include "opt_ofw_pci.h"
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    
    #include <dev/ofw/ofw_bus.h>
    #include <dev/ofw/ofw_pci.h>
    #include <dev/ofw/openfirm.h>
    
    #include <machine/bus.h>
    #include <machine/ofw_bus.h>
    
    #include <dev/pci/pcireg.h>
    #include <dev/pci/pcivar.h>
    #include <dev/pci/pcib_private.h>
    
    #include "pcib_if.h"
    
    #include <sparc64/pci/ofw_pci.h>
    #include <sparc64/pci/ofw_pcib_subr.h>
    
    void
    ofw_pcib_gen_setup(device_t bridge)
    {
            struct ofw_pcib_gen_softc *sc = device_get_softc(bridge);
            u_int secbus;
    
            sc->ops_pcib_sc.dev = bridge;
            sc->ops_node = ofw_bus_get_node(bridge);
            KASSERT(sc->ops_node != 0,
                ("ofw_pcib_gen_setup: no ofw pci parent bus!"));
    
            /*
             * Setup the secondary bus number register, by allocating a new unique
             * bus number for it; the firmware preset does not always seem to be
             * correct.
             */
            secbus = ofw_pci_alloc_busno(sc->ops_node);
            pci_write_config(bridge, PCIR_PRIBUS_1, pci_get_bus(bridge), 1);
            pci_write_config(bridge, PCIR_SECBUS_1, secbus, 1);
            pci_write_config(bridge, PCIR_SUBBUS_1, secbus, 1);
            sc->ops_pcib_sc.subbus = sc->ops_pcib_sc.secbus = secbus;
            /* Notify parent bridges. */
            OFW_PCI_ADJUST_BUSRANGE(device_get_parent(bridge), secbus);
    
            ofw_bus_setup_iinfo(sc->ops_node, &sc->ops_iinfo,
                sizeof(ofw_pci_intr_t));
    }
    
    int
    ofw_pcib_gen_route_interrupt(device_t bridge, device_t dev, int intpin)
    {
            struct ofw_pcib_gen_softc *sc = device_get_softc(bridge);
            struct ofw_bus_iinfo *ii = &sc->ops_iinfo;
            struct ofw_pci_register reg;
            device_t pbridge = device_get_parent(device_get_parent(bridge));
            phandle_t node = ofw_bus_get_node(dev);
            ofw_pci_intr_t pintr, mintr;
            u_int8_t maskbuf[sizeof(reg) + sizeof(pintr)];
    
            if (ii->opi_imapsz > 0) {
                    pintr = intpin;
                    if (ofw_bus_lookup_imap(node, ii, &reg, sizeof(reg), &pintr,
                        sizeof(pintr), &mintr, sizeof(mintr), maskbuf)) {
                            /*
                             * If we've found a mapping, return it and don't map
                             * it again on higher levels - that causes problems
                             * in some cases, and never seems to be required.
                             */
                            return (mintr);
                    }
           } else if (intpin >= 1 && intpin <= 4) {
                   /*
                    * When an interrupt map is missing, we need to do the
                    * standard PCI swizzle and continue mapping at the parent.
                    */
                   return (pcib_route_interrupt(bridge, dev, intpin));
           }
           /* Try at the parent. */
           return (PCIB_ROUTE_INTERRUPT(pbridge, bridge, intpin));
   }
   
   phandle_t
   ofw_pcib_gen_get_node(device_t bridge, device_t dev)
   {
           struct ofw_pcib_gen_softc *sc = device_get_softc(bridge);
   
           return (sc->ops_node);
   }
   
   void
   ofw_pcib_gen_adjust_busrange(device_t bridge, u_int subbus)
   {
           struct ofw_pcib_gen_softc *sc = device_get_softc(bridge);
   
           if (subbus > sc->ops_pcib_sc.subbus) {
   #ifdef OFW_PCI_DEBUG
                   device_printf(bridge,
                       "adjusting secondary bus number from %d to %d\n",
                       sc->ops_pcib_sc.subbus, subbus);
   #endif
                   pci_write_config(bridge, PCIR_SUBBUS_1, subbus, 1);
                   sc->ops_pcib_sc.subbus = subbus;
                   /* Notify parent bridges. */
                   OFW_PCI_ADJUST_BUSRANGE(device_get_parent(bridge), subbus);
           }
   }

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