FreeBSD/Linux Kernel Cross Reference
sys/arm/freescale/vybrid/vf_mscm.c

     /*-
      * Copyright (c) 2013 Ruslan Bukin <br@bsdpad.com>
      * 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.
     */
    
    /*
     * Vybrid Family Miscellaneous System Control Module (MSCM)
     * Chapter 66, Vybrid Reference Manual, Rev. 5, 07/2013
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/11.0/sys/arm/freescale/vybrid/vf_mscm.c 281085 2015-04-04 21:34:26Z andrew $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/malloc.h>
    #include <sys/rman.h>
    #include <sys/timeet.h>
    #include <sys/timetc.h>
    #include <sys/watchdog.h>
    
    #include <dev/fdt/fdt_common.h>
    #include <dev/ofw/openfirm.h>
    #include <dev/ofw/ofw_bus.h>
    #include <dev/ofw/ofw_bus_subr.h>
    
    #include <machine/bus.h>
    #include <machine/cpu.h>
    #include <machine/intr.h>
    
    #include <arm/freescale/vybrid/vf_common.h>
    
    #define VF_NINT 112     /* Total number of interrupts */
    
    /* Int Router Shared Peripheral Routing Control */
    #define MSCM_IRSPRC(n)  (0x880 + 2 * n)
    
    struct mscm_softc {
            struct resource         *res[1];
            bus_space_tag_t         bst;
            bus_space_handle_t      bsh;
    };
    
    static struct resource_spec mscm_spec[] = {
            { SYS_RES_MEMORY,       0,      RF_ACTIVE },
            { -1, 0 }
    };
    
    static int
    mscm_probe(device_t dev)
    {
    
            if (!ofw_bus_status_okay(dev))
                    return (ENXIO);
    
            if (!ofw_bus_is_compatible(dev, "fsl,mvf600-mscm"))
                    return (ENXIO);
    
            device_set_desc(dev, "Vybrid Family Miscellaneous System Control Module");
            return (BUS_PROBE_DEFAULT);
    }
    
    static int
    mscm_attach(device_t dev)
    {
            struct mscm_softc *sc;
            int i;
    
            sc = device_get_softc(dev);
    
            if (bus_alloc_resources(dev, mscm_spec, sc->res)) {
                    device_printf(dev, "could not allocate resources\n");
                    return (ENXIO);
            }
    
           /* Memory interface */
           sc->bst = rman_get_bustag(sc->res[0]);
           sc->bsh = rman_get_bushandle(sc->res[0]);
   
           /* Route all the interrupts to CP0 */
           for (i = 0; i < VF_NINT; i++)
                   WRITE2(sc, MSCM_IRSPRC(i), 1);
   
           return (0);
   }
   
   static device_method_t mscm_methods[] = {
           DEVMETHOD(device_probe,         mscm_probe),
           DEVMETHOD(device_attach,        mscm_attach),
           { 0, 0 }
   };
   
   static driver_t mscm_driver = {
           "mscm",
           mscm_methods,
           sizeof(struct mscm_softc),
   };
   
   static devclass_t mscm_devclass;
   
   DRIVER_MODULE(mscm, simplebus, mscm_driver, mscm_devclass, 0, 0);

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