FreeBSD/Linux Kernel Cross Reference
sys/arm/ti/omap4/omap4_wugen.c

     /*-
      * Copyright (c) 2016 Svatopluk Kraus
      * Copyright (c) 2016 Michal Meloun
      * 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 AND CONTRIBUTORS ``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.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/bus.h>
    #include <sys/conf.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/rman.h>
    #include <sys/systm.h>
    
    #include <machine/fdt.h>
    #include <machine/intr.h>
    #include <machine/resource.h>
    
    #include <dev/ofw/ofw_bus.h>
    #include <dev/ofw/ofw_bus_subr.h>
    
    #include "pic_if.h"
    
    static struct ofw_compat_data compat_data[] = {
            {"ti,omap4-wugen-mpu",  1},
            {NULL,                  0}
    };
    
    struct omap4_wugen_sc {
            device_t                sc_dev;
            struct resource         *sc_mem_res;
            device_t                sc_parent;
    };
    
    static int
    omap4_wugen_activate_intr(device_t dev, struct intr_irqsrc *isrc,
        struct resource *res, struct intr_map_data *data)
    {
            struct omap4_wugen_sc *sc = device_get_softc(dev);
    
            return (PIC_ACTIVATE_INTR(sc->sc_parent, isrc, res, data));
    }
    
    static void
    omap4_wugen_disable_intr(device_t dev, struct intr_irqsrc *isrc)
    {
            struct omap4_wugen_sc *sc = device_get_softc(dev);
    
            PIC_DISABLE_INTR(sc->sc_parent, isrc);
    }
    
    static void
    omap4_wugen_enable_intr(device_t dev, struct intr_irqsrc *isrc)
    {
            struct omap4_wugen_sc *sc = device_get_softc(dev);
    
            PIC_ENABLE_INTR(sc->sc_parent, isrc);
    }
    
    static int
    omap4_wugen_map_intr(device_t dev, struct intr_map_data *data,
        struct intr_irqsrc **isrcp)
    {
            struct omap4_wugen_sc *sc = device_get_softc(dev);
    
            return (PIC_MAP_INTR(sc->sc_parent, data, isrcp));
    }
    
    static int
    omap4_wugen_deactivate_intr(device_t dev, struct intr_irqsrc *isrc,
        struct resource *res, struct intr_map_data *data)
    {
            struct omap4_wugen_sc *sc = device_get_softc(dev);
    
            return (PIC_DEACTIVATE_INTR(sc->sc_parent, isrc, res, data));
   }
   
   static int
   omap4_wugen_setup_intr(device_t dev, struct intr_irqsrc *isrc,
       struct resource *res, struct intr_map_data *data)
   {
           struct omap4_wugen_sc *sc = device_get_softc(dev);
   
           return (PIC_SETUP_INTR(sc->sc_parent, isrc, res, data));
   }
   
   static int
   omap4_wugen_teardown_intr(device_t dev, struct intr_irqsrc *isrc,
       struct resource *res, struct intr_map_data *data)
   {
           struct omap4_wugen_sc *sc = device_get_softc(dev);
   
           return (PIC_TEARDOWN_INTR(sc->sc_parent, isrc, res, data));
   }
   
   static void
   omap4_wugen_pre_ithread(device_t dev, struct intr_irqsrc *isrc)
   {
           struct omap4_wugen_sc *sc = device_get_softc(dev);
   
           PIC_PRE_ITHREAD(sc->sc_parent, isrc);
   }
   
   static void
   omap4_wugen_post_ithread(device_t dev, struct intr_irqsrc *isrc)
   {
           struct omap4_wugen_sc *sc = device_get_softc(dev);
   
           PIC_POST_ITHREAD(sc->sc_parent, isrc);
   }
   
   static void
   omap4_wugen_post_filter(device_t dev, struct intr_irqsrc *isrc)
   {
           struct omap4_wugen_sc *sc = device_get_softc(dev);
   
           PIC_POST_FILTER(sc->sc_parent, isrc);
   }
   
   #ifdef SMP
   static int
   omap4_wugen_bind_intr(device_t dev, struct intr_irqsrc *isrc)
   {
           struct omap4_wugen_sc *sc = device_get_softc(dev);
   
           return (PIC_BIND_INTR(sc->sc_parent, isrc));
   }
   #endif
   
   static int
   omap4_wugen_probe(device_t dev)
   {
   
           if (!ofw_bus_status_okay(dev))
                   return (ENXIO);
   
           if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
                   return (ENXIO);
   
           return (BUS_PROBE_DEFAULT);
   }
   
   static int
   omap4_wugen_detach(device_t dev)
   {
           struct omap4_wugen_sc *sc;
   
           sc = device_get_softc(dev);
           if (sc->sc_mem_res != NULL) {
                   bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res);
                   sc->sc_mem_res = NULL;
           }
           return (0);
   }
   
   static int
   omap4_wugen_attach(device_t dev)
   {
           struct omap4_wugen_sc *sc;
           phandle_t node;
           phandle_t parent_xref;
           int rid, rv;
   
           sc = device_get_softc(dev);
           sc->sc_dev = dev;
           node = ofw_bus_get_node(dev);
   
           rv = OF_getencprop(node, "interrupt-parent", &parent_xref,
               sizeof(parent_xref));
           if (rv <= 0) {
                   device_printf(dev, "can't read parent node property\n");
                   goto fail;
           }
           sc->sc_parent = OF_device_from_xref(parent_xref);
           if (sc->sc_parent == NULL) {
                   device_printf(dev, "can't find parent controller\n");
                   goto fail;
           }
   
           rid = 0;
           sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
               RF_ACTIVE);
           if (sc->sc_mem_res == NULL) {
                   device_printf(dev, "can't allocate resources\n");
                   return (ENXIO);
           }
   
           if (intr_pic_register(dev, OF_xref_from_node(node)) == NULL) {
                   device_printf(dev, "can't register PIC\n");
                   goto fail;
           }
           return (0);
   
   fail:
           omap4_wugen_detach(dev);
           return (ENXIO);
   }
   
   static device_method_t omap4_wugen_methods[] = {
           DEVMETHOD(device_probe,         omap4_wugen_probe),
           DEVMETHOD(device_attach,        omap4_wugen_attach),
           DEVMETHOD(device_detach,        omap4_wugen_detach),
   
           /* Interrupt controller interface */
           DEVMETHOD(pic_activate_intr,    omap4_wugen_activate_intr),
           DEVMETHOD(pic_disable_intr,     omap4_wugen_disable_intr),
           DEVMETHOD(pic_enable_intr,      omap4_wugen_enable_intr),
           DEVMETHOD(pic_map_intr,         omap4_wugen_map_intr),
           DEVMETHOD(pic_deactivate_intr,  omap4_wugen_deactivate_intr),
           DEVMETHOD(pic_setup_intr,       omap4_wugen_setup_intr),
           DEVMETHOD(pic_teardown_intr,    omap4_wugen_teardown_intr),
           DEVMETHOD(pic_pre_ithread,      omap4_wugen_pre_ithread),
           DEVMETHOD(pic_post_ithread,     omap4_wugen_post_ithread),
           DEVMETHOD(pic_post_filter,      omap4_wugen_post_filter),
   #ifdef SMP
           DEVMETHOD(pic_bind_intr,        omap4_wugen_bind_intr),
   #endif
           DEVMETHOD_END
   };
   
   DEFINE_CLASS_0(omap4_wugen, omap4_wugen_driver, omap4_wugen_methods,
       sizeof(struct omap4_wugen_sc));
   EARLY_DRIVER_MODULE(omap4_wugen, simplebus, omap4_wugen_driver, NULL, NULL,
       BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE + 1);

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