FreeBSD/Linux Kernel Cross Reference
sys/powerpc/ofw/openpic_ofw.c

     /*-
      * SPDX-License-Identifier: BSD-3-Clause
      *
      * Copyright 2003 by Peter Grehan. 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.
     * 3. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * 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 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.
     *
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/module.h>
    #include <sys/bus.h>
    #include <sys/conf.h>
    #include <sys/kernel.h>
    
    #include <dev/ofw/ofw_bus.h>
    #include <dev/ofw/ofw_bus_subr.h>
    #include <dev/ofw/openfirm.h>
    
    #include <machine/bus.h>
    #include <machine/intr_machdep.h>
    #include <machine/md_var.h>
    #include <machine/pio.h>
    #include <machine/resource.h>
    
    #include <vm/vm.h>
    #include <vm/pmap.h>
    
    #include <sys/rman.h>
    
    #include <machine/openpicreg.h>
    #include <machine/openpicvar.h>
    
    #include "pic_if.h"
    
    /*
     * OFW interface
     */
    static int      openpic_ofw_probe(device_t);
    static int      openpic_ofw_attach(device_t);
    
    static void     openpic_ofw_translate_code(device_t, u_int irq, int code,
                        enum intr_trigger *trig, enum intr_polarity *pol);
    
    static device_method_t  openpic_ofw_methods[] = {
            /* Device interface */
            DEVMETHOD(device_probe,         openpic_ofw_probe),
            DEVMETHOD(device_attach,        openpic_ofw_attach),
            DEVMETHOD(device_suspend,       openpic_suspend),
            DEVMETHOD(device_resume,        openpic_resume),
    
            /* PIC interface */
            DEVMETHOD(pic_bind,             openpic_bind),
            DEVMETHOD(pic_config,           openpic_config),
            DEVMETHOD(pic_dispatch,         openpic_dispatch),
            DEVMETHOD(pic_enable,           openpic_enable),
            DEVMETHOD(pic_eoi,              openpic_eoi),
            DEVMETHOD(pic_ipi,              openpic_ipi),
            DEVMETHOD(pic_mask,             openpic_mask),
            DEVMETHOD(pic_unmask,           openpic_unmask),
    
            DEVMETHOD(pic_translate_code,   openpic_ofw_translate_code),
    
            DEVMETHOD_END
    };
    
    static driver_t openpic_ofw_driver = {
            "openpic",
            openpic_ofw_methods,
            sizeof(struct openpic_softc),
    };
    
    EARLY_DRIVER_MODULE(openpic, ofwbus, openpic_ofw_driver, 0, 0,
        BUS_PASS_INTERRUPT);
   EARLY_DRIVER_MODULE(openpic, simplebus, openpic_ofw_driver, 0, 0,
       BUS_PASS_INTERRUPT);
   EARLY_DRIVER_MODULE(openpic, macio, openpic_ofw_driver, 0, 0,
       BUS_PASS_INTERRUPT);
   
   static int
   openpic_ofw_probe(device_t dev)
   {
           const char *type = ofw_bus_get_type(dev);
   
           if (type == NULL)
                   return (ENXIO);
   
           if (!ofw_bus_is_compatible(dev, "chrp,open-pic") &&
               strcmp(type, "open-pic") != 0)
                   return (ENXIO);
   
           /*
            * On some U4 systems, there is a phantom MPIC in the mac-io cell.
            * The uninorth driver will pick up the real PIC, so ignore it here.
            */
           if (OF_finddevice("/u4") != (phandle_t)-1)
                   return (ENXIO);
   
           device_set_desc(dev, OPENPIC_DEVSTR);
           return (0);
   }
   
   static int
   openpic_ofw_attach(device_t dev)
   {
           struct openpic_softc *sc;
           phandle_t xref, node;
   
           node = ofw_bus_get_node(dev);
           sc = device_get_softc(dev);
   
           if (OF_getencprop(node, "phandle", &xref, sizeof(xref)) == -1 &&
               OF_getencprop(node, "ibm,phandle", &xref, sizeof(xref)) == -1 &&
               OF_getencprop(node, "linux,phandle", &xref, sizeof(xref)) == -1)
                   xref = node;
   
           if (ofw_bus_is_compatible(dev, "fsl,mpic")) {
                   sc->sc_quirks = OPENPIC_QUIRK_SINGLE_BIND;
                   sc->sc_quirks |= OPENPIC_QUIRK_HIDDEN_IRQS;
           }
   
           return (openpic_common_attach(dev, xref));
   }
   
   static void
   openpic_ofw_translate_code(device_t dev, u_int irq, int code,
       enum intr_trigger *trig, enum intr_polarity *pol)
   {
           switch (code) {
           case 0:
                   /* L to H edge */
                   *trig = INTR_TRIGGER_EDGE;
                   *pol = INTR_POLARITY_HIGH;
                   break;
           case 1:
                   /* Active L level */
                   *trig = INTR_TRIGGER_LEVEL;
                   *pol = INTR_POLARITY_LOW;
                   break;
           case 2:
                   /* Active H level */
                   *trig = INTR_TRIGGER_LEVEL;
                   *pol = INTR_POLARITY_HIGH;
                   break;
           case 3:
                   /* H to L edge */
                   *trig = INTR_TRIGGER_EDGE;
                   *pol = INTR_POLARITY_LOW;
                   break;
           default:
                   *trig = INTR_TRIGGER_CONFORM;
                   *pol = INTR_POLARITY_CONFORM;
           }
   }

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