FreeBSD/Linux Kernel Cross Reference
sys/dev/gpio/pl061_fdt.c

     /*-
      * SPDX-License-Identifier: BSD-2-Clause
      *
      * Copyright (c) 2020 Andrew Turner
      *
      * This work was supported by Innovate UK project 105694, "Digital Security
      * by Design (DSbD) Technology Platform Prototype".
      *
      * 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/systm.h>
    #include <sys/bus.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/lock.h>
    #include <sys/mutex.h>
    
    #include <dev/ofw/openfirm.h>
    #include <dev/ofw/ofw_bus.h>
    #include <dev/ofw/ofw_bus_subr.h>
    
    #include <dev/gpio/gpiobusvar.h>
    
    #include "pl061.h"
    
    static int
    pl061_fdt_probe(device_t dev)
    {
            if (!ofw_bus_status_okay(dev))
                    return (ENXIO);
    
            if (!ofw_bus_is_compatible(dev, "arm,pl061"))
                    return (ENXIO);
    
            device_set_desc(dev, "Arm PL061 GPIO Controller");
    
            return (BUS_PROBE_DEFAULT);
    }
    
    static int
    pl061_fdt_attach(device_t dev)
    {
            int error;
    
            error = pl061_attach(dev);
            if (error != 0)
                    return (error);
    
            if (!intr_pic_register(dev, OF_xref_from_node(ofw_bus_get_node(dev)))) {
                    device_printf(dev, "couldn't register PIC\n");
                    pl061_detach(dev);
                    error = ENXIO;
            }
    
            return (error);
    }
    
    static device_method_t pl061_fdt_methods[] = {
            /* Device interface */
            DEVMETHOD(device_probe,         pl061_fdt_probe),
            DEVMETHOD(device_attach,        pl061_fdt_attach),
    
            DEVMETHOD_END
    };
    
    DEFINE_CLASS_1(gpio, pl061_fdt_driver, pl061_fdt_methods,
        sizeof(struct pl061_softc), pl061_driver);
    
    EARLY_DRIVER_MODULE(pl061, ofwbus, pl061_fdt_driver, NULL, NULL,
        BUS_PASS_INTERRUPT + BUS_PASS_ORDER_LATE);
    MODULE_DEPEND(pl061, gpiobus, 1, 1, 1);

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