FreeBSD/Linux Kernel Cross Reference
sys/dev/dpaa/fman_fdt.c

     /*-
      * Copyright (c) 2012 Semihalf.
      * 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: releng/12.0/sys/dev/dpaa/fman_fdt.c 325204 2017-10-31 02:53:50Z jhibbits $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/bus.h>
    #include <sys/module.h>
    
    #include <dev/fdt/simplebus.h>
    #include <dev/ofw/ofw_bus.h>
    #include <dev/ofw/ofw_bus_subr.h>
    
    #include <contrib/ncsw/inc/ncsw_ext.h>
    #include <contrib/ncsw/inc/enet_ext.h>
    
    #include "fman.h"
    
    #define FFMAN_DEVSTR    "Freescale Frame Manager"
    
    static int      fman_fdt_probe(device_t dev);
    
    static device_method_t fman_methods[] = {
            /* Device interface */
            DEVMETHOD(device_probe,         fman_fdt_probe),
            DEVMETHOD(device_attach,        fman_attach),
            DEVMETHOD(device_detach,        fman_detach),
    
            DEVMETHOD(device_shutdown,      fman_shutdown),
            DEVMETHOD(device_suspend,       fman_suspend),
            DEVMETHOD(device_resume,        fman_resume_dev),
    
            DEVMETHOD(bus_alloc_resource,   fman_alloc_resource),
            DEVMETHOD(bus_activate_resource,        fman_activate_resource),
            DEVMETHOD(bus_release_resource, fman_release_resource),
            { 0, 0 }
    };
    
    DEFINE_CLASS_1(fman, fman_driver, fman_methods,
        sizeof(struct fman_softc), simplebus_driver);
    static devclass_t fman_devclass;
    EARLY_DRIVER_MODULE(fman, simplebus, fman_driver, fman_devclass, 0, 0,
        BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
    
    
    static int
    fman_fdt_probe(device_t dev)
    {
    
            if (!ofw_bus_is_compatible(dev, "fsl,fman"))
                    return (ENXIO);
    
            device_set_desc(dev, FFMAN_DEVSTR);
    
            return (BUS_PROBE_DEFAULT);
    }
    
    uint32_t
    fman_get_clock(struct fman_softc *sc)
    {
            device_t dev;
            phandle_t node;
            pcell_t fman_clock;
    
            dev = sc->sc_base.dev;
            node = ofw_bus_get_node(dev);
    
            if ((OF_getprop(node, "clock-frequency", &fman_clock,
                sizeof(fman_clock)) <= 0) || (fman_clock == 0)) {
                    device_printf(dev, "could not acquire correct frequency "
                        "from DTS\n");
    
                    return (0);
           }
   
           return ((uint32_t)fman_clock);
   }
   

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