FreeBSD/Linux Kernel Cross Reference
sys/dev/altera/avgen/altera_avgen_nexus.c

     /*-
      * Copyright (c) 2012-2013 Robert N. M. Watson
      * All rights reserved.
      *
      * This software was developed by SRI International and the University of
      * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
      * ("CTSRD"), as part of the DARPA CRASH research programme.
      *
      * 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/11.0/sys/dev/altera/avgen/altera_avgen_nexus.c 295883 2016-02-22 09:10:23Z skra $");
    
    #include <sys/param.h>
    #include <sys/bus.h>
    #include <sys/condvar.h>
    #include <sys/conf.h>
    #include <sys/kernel.h>
    #include <sys/lock.h>
    #include <sys/malloc.h>
    #include <sys/module.h>
    #include <sys/mutex.h>
    #include <sys/rman.h>
    #include <sys/stat.h>
    #include <sys/systm.h>
    #include <sys/uio.h>
    
    #include <machine/bus.h>
    #include <machine/resource.h>
    
    #include <vm/vm.h>
    
    #include <dev/altera/avgen/altera_avgen.h>
    
    static int
    altera_avgen_nexus_probe(device_t dev)
    {
    
            device_set_desc(dev, "Generic Altera Avalon device attachment");
            return (BUS_PROBE_NOWILDCARD);
    }
    
    static int
    altera_avgen_nexus_attach(device_t dev)
    {
            struct altera_avgen_softc *sc;
            const char *str_fileio, *str_mmapio;
            const char *str_devname;
            int devunit, error;
    
            sc = device_get_softc(dev);
            sc->avg_dev = dev;
            sc->avg_unit = device_get_unit(dev);
    
            /*
             * Query non-standard hints to find out what operations are permitted
             * on the device, and whether it is cached.
             */
            str_fileio = NULL;
            str_mmapio = NULL;
            str_devname = NULL;
            devunit = -1;
            sc->avg_width = 1;
            error = resource_int_value(device_get_name(dev), device_get_unit(dev),
                ALTERA_AVALON_STR_WIDTH, &sc->avg_width);
            if (error != 0 && error != ENOENT) {
                    device_printf(dev, "invalid %s\n", ALTERA_AVALON_STR_WIDTH);
                    return (error);
            }
            (void)resource_string_value(device_get_name(dev),
                device_get_unit(dev), ALTERA_AVALON_STR_FILEIO, &str_fileio);
            (void)resource_string_value(device_get_name(dev),
                device_get_unit(dev), ALTERA_AVALON_STR_MMAPIO, &str_mmapio);
            (void)resource_string_value(device_get_name(dev),
                device_get_unit(dev), ALTERA_AVALON_STR_DEVNAME, &str_devname);
            (void)resource_int_value(device_get_name(dev), device_get_unit(dev),
                ALTERA_AVALON_STR_DEVUNIT, &devunit);
    
            /* Memory allocation and checking. */
           sc->avg_rid = 0;
           sc->avg_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
               &sc->avg_rid, RF_ACTIVE);
           if (sc->avg_res == NULL) {
                   device_printf(dev, "couldn't map memory\n");
                   return (ENXIO);
           }
           error = altera_avgen_attach(sc, str_fileio, str_mmapio, str_devname,
               devunit);
           if (error != 0)
                   bus_release_resource(dev, SYS_RES_MEMORY, sc->avg_rid,
                       sc->avg_res);
           return (error);
   }
   
   static int
   altera_avgen_nexus_detach(device_t dev)
   {
           struct altera_avgen_softc *sc;
   
           sc = device_get_softc(dev);
           altera_avgen_detach(sc);
           bus_release_resource(dev, SYS_RES_MEMORY, sc->avg_rid, sc->avg_res);
           return (0);
   }
   
   static device_method_t altera_avgen_nexus_methods[] = {
           DEVMETHOD(device_probe,         altera_avgen_nexus_probe),
           DEVMETHOD(device_attach,        altera_avgen_nexus_attach),
           DEVMETHOD(device_detach,        altera_avgen_nexus_detach),
           { 0, 0 }
   };
   
   static driver_t altera_avgen_nexus_driver = {
           "altera_avgen",
           altera_avgen_nexus_methods,
           sizeof(struct altera_avgen_softc),
   };
   
   DRIVER_MODULE(avgen, nexus, altera_avgen_nexus_driver, altera_avgen_devclass,
       0, 0);

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