FreeBSD/Linux Kernel Cross Reference
sys/mips/ingenic/jz4780_dme.c

     /*-
      * Copyright 2015 Alexander Kabaev <kan@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 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.
     */
    
    /*
     * Ingenic JZ4780 NAND and External Memory Controller (NEMC) driver.
     *
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/12.0/sys/mips/ingenic/jz4780_dme.c 308857 2016-11-19 17:46:18Z br $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/conf.h>
    #include <sys/bus.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/lock.h>
    #include <sys/mutex.h>
    #include <sys/resource.h>
    #include <sys/rman.h>
    
    #include <machine/bus.h>
    
    #include <dev/fdt/fdt_common.h>
    #include <dev/ofw/ofw_bus.h>
    #include <dev/ofw/ofw_bus_subr.h>
    
    struct jz4780_dme_softc {
            device_t                dev;
            struct resource         *res[2];
    };
    
    static struct resource_spec jz4780_dme_spec[] = {
            { SYS_RES_MEMORY, 0, RF_ACTIVE },
            { SYS_RES_MEMORY, 1, RF_ACTIVE },
            { -1, 0 }
    };
    
    static int jz4780_dme_probe(device_t dev);
    static int jz4780_dme_attach(device_t dev);
    static int jz4780_dme_detach(device_t dev);
    
    static int
    jz4780_dme_probe(device_t dev)
    {
    
            if (!ofw_bus_status_okay(dev))
                    return (ENXIO);
    
            if (!ofw_bus_is_compatible(dev, "davicom,dm9000"))
                    return (ENXIO);
    
            device_set_desc(dev, "Davicom DM9000C 10/100BaseTX");
    
            return (BUS_PROBE_DEFAULT);
    }
    
    static int
    jz4780_dme_attach(device_t dev)
    {
            struct jz4780_dme_softc *sc = device_get_softc(dev);
    
            sc->dev = dev;
    
            if (bus_alloc_resources(dev, jz4780_dme_spec, sc->res)) {
                    device_printf(dev, "could not allocate resources for device\n");
                    return (ENXIO);
            }
    
            return (0);
    }
    
    static int
    jz4780_dme_detach(device_t dev)
    {
           struct jz4780_dme_softc *sc = device_get_softc(dev);
   
           bus_release_resources(dev, jz4780_dme_spec, sc->res);
           return (0);
   }
   
   static device_method_t jz4780_dme_methods[] = {
           /* Device interface */
           DEVMETHOD(device_probe,         jz4780_dme_probe),
           DEVMETHOD(device_attach,        jz4780_dme_attach),
           DEVMETHOD(device_detach,        jz4780_dme_detach),
   
           DEVMETHOD_END
   };
   
   static driver_t jz4780_dme_driver = {
           "dme",
           jz4780_dme_methods,
           sizeof(struct jz4780_dme_softc),
   };
   
   static devclass_t jz4780_dme_devclass;
   
   DRIVER_MODULE(jz4780_dme, simplebus, jz4780_dme_driver,
       jz4780_dme_devclass, 0, 0);

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