FreeBSD/Linux Kernel Cross Reference
sys/arm/at91/at91_sdramc.c

     /*-
      * Copyright (c) 2014 Warner Losh.  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 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 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 "opt_platform.h"
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/bus.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/resource.h>
    #include <sys/systm.h>
    #include <sys/rman.h>
    
    #include <machine/bus.h>
    
    #include <arm/at91/at91var.h>
    #include <arm/at91/at91_aicreg.h>
    
    #ifdef FDT
    #include <dev/fdt/fdt_common.h>
    #include <dev/ofw/ofw_bus.h>
    #include <dev/ofw/ofw_bus_subr.h>
    #endif
    
    struct sdramc_softc {
            struct resource *mem_res;       /* Memory resource */
            device_t        sc_dev;
    };
    
    static int
    at91_sdramc_probe(device_t dev)
    {
    #ifdef FDT
            if (!ofw_bus_is_compatible(dev, "atmel,at91sam9260-sdramc"))
                    return (ENXIO);
    #endif
            device_set_desc(dev, "SDRAMC");
            return (0);
    }
    
    static int
    at91_sdramc_attach(device_t dev)
    {
            int rid, err = 0;
            struct sdramc_softc *sc;
    
            sc = device_get_softc(dev);
            sc->sc_dev = dev;
    
            rid = 0;
            sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
                RF_ACTIVE);
    
            if (sc->mem_res == NULL)
                    panic("couldn't allocate register resources");
    
            return (err);
    }
    
    static device_method_t at91_sdramc_methods[] = {
            DEVMETHOD(device_probe, at91_sdramc_probe),
            DEVMETHOD(device_attach, at91_sdramc_attach),
            DEVMETHOD_END
    };
    
    static driver_t at91_sdramc_driver = {
            "at91_sdramc",
            at91_sdramc_methods,
            sizeof(struct sdramc_softc),
    };
    
    static devclass_t at91_sdramc_devclass;
    
    #ifdef FDT
   DRIVER_MODULE(at91_sdramc, simplebus, at91_sdramc_driver, at91_sdramc_devclass, NULL,
       NULL);
   #else
   DRIVER_MODULE(at91_sdramc, atmelarm, at91_sdramc_driver, at91_sdramc_devclass, NULL,
       NULL);
   #endif

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