The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/altera/sdcard/altera_sdcard_nexus.c

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    1 /*-
    2  * Copyright (c) 2012 Robert N. M. Watson
    3  * All rights reserved.
    4  *
    5  * This software was developed by SRI International and the University of
    6  * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
    7  * ("CTSRD"), as part of the DARPA CRASH research programme.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   28  * SUCH DAMAGE.
   29  */
   30 
   31 #include <sys/cdefs.h>
   32 __FBSDID("$FreeBSD$");
   33 
   34 #include <sys/param.h>
   35 #include <sys/bus.h>
   36 #include <sys/condvar.h>
   37 #include <sys/conf.h>
   38 #include <sys/bio.h>
   39 #include <sys/kernel.h>
   40 #include <sys/lock.h>
   41 #include <sys/malloc.h>
   42 #include <sys/module.h>
   43 #include <sys/mutex.h>
   44 #include <sys/rman.h>
   45 #include <sys/systm.h>
   46 #include <sys/taskqueue.h>
   47 
   48 #include <machine/bus.h>
   49 #include <machine/resource.h>
   50 
   51 #include <geom/geom_disk.h>
   52 
   53 #include <dev/altera/sdcard/altera_sdcard.h>
   54 
   55 /*
   56  * Nexus bus attachment for the Altera SD Card IP core.  Appropriate for most
   57  * Altera FPGA SoC-style configurations in which the IP core will be exposed
   58  * to the processor via a memory-mapped Avalon bus.
   59  */
   60 static int
   61 altera_sdcard_nexus_probe(device_t dev)
   62 {
   63 
   64         device_set_desc(dev, "Altera Secure Data Card IP Core");
   65         return (BUS_PROBE_NOWILDCARD);
   66 }
   67 
   68 static int
   69 altera_sdcard_nexus_attach(device_t dev)
   70 {
   71         struct altera_sdcard_softc *sc;
   72 
   73         sc = device_get_softc(dev);
   74         sc->as_dev = dev;
   75         sc->as_unit = device_get_unit(dev);
   76         sc->as_rid = 0;
   77         sc->as_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
   78             &sc->as_rid, RF_ACTIVE);
   79         if (sc->as_res == NULL) {
   80                 device_printf(dev, "couldn't map memory\n");
   81                 return (ENXIO);
   82         }
   83         altera_sdcard_attach(sc);
   84         return (0);
   85 }
   86 
   87 static int
   88 altera_sdcard_nexus_detach(device_t dev)
   89 {
   90         struct altera_sdcard_softc *sc;
   91 
   92         sc = device_get_softc(dev);
   93         KASSERT(sc->as_res != NULL, ("%s: resources not allocated",
   94             __func__));
   95         altera_sdcard_detach(sc);
   96         bus_release_resource(dev, SYS_RES_MEMORY, sc->as_rid, sc->as_res);
   97         return (0);
   98 }
   99 
  100 static device_method_t altera_sdcard_nexus_methods[] = {
  101         DEVMETHOD(device_probe,         altera_sdcard_nexus_probe),
  102         DEVMETHOD(device_attach,        altera_sdcard_nexus_attach),
  103         DEVMETHOD(device_detach,        altera_sdcard_nexus_detach),
  104         { 0, 0 }
  105 };
  106 
  107 static driver_t altera_sdcard_nexus_driver = {
  108         "altera_sdcardc",
  109         altera_sdcard_nexus_methods,
  110         sizeof(struct altera_sdcard_softc),
  111 };
  112 
  113 DRIVER_MODULE(altera_sdcard, nexus, altera_sdcard_nexus_driver,
  114     altera_sdcard_devclass, 0, 0);

Cache object: 4c864f376b2062b6e14e76e7bb814098


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