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  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2012 Robert N. M. Watson
    5  * All rights reserved.
    6  *
    7  * This software was developed by SRI International and the University of
    8  * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
    9  * ("CTSRD"), as part of the DARPA CRASH research programme.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  */
   32 
   33 #include <sys/cdefs.h>
   34 __FBSDID("$FreeBSD: releng/12.0/sys/dev/altera/sdcard/altera_sdcard_nexus.c 326255 2017-11-27 14:52:40Z pfg $");
   35 
   36 #include <sys/param.h>
   37 #include <sys/bus.h>
   38 #include <sys/condvar.h>
   39 #include <sys/conf.h>
   40 #include <sys/bio.h>
   41 #include <sys/kernel.h>
   42 #include <sys/lock.h>
   43 #include <sys/malloc.h>
   44 #include <sys/module.h>
   45 #include <sys/mutex.h>
   46 #include <sys/rman.h>
   47 #include <sys/systm.h>
   48 #include <sys/taskqueue.h>
   49 
   50 #include <machine/bus.h>
   51 #include <machine/resource.h>
   52 
   53 #include <geom/geom_disk.h>
   54 
   55 #include <dev/altera/sdcard/altera_sdcard.h>
   56 
   57 /*
   58  * Nexus bus attachment for the Altera SD Card IP core.  Appropriate for most
   59  * Altera FPGA SoC-style configurations in which the IP core will be exposed
   60  * to the processor via a memory-mapped Avalon bus.
   61  */
   62 static int
   63 altera_sdcard_nexus_probe(device_t dev)
   64 {
   65 
   66         device_set_desc(dev, "Altera Secure Data Card IP Core");
   67         return (BUS_PROBE_NOWILDCARD);
   68 }
   69 
   70 static int
   71 altera_sdcard_nexus_attach(device_t dev)
   72 {
   73         struct altera_sdcard_softc *sc;
   74 
   75         sc = device_get_softc(dev);
   76         sc->as_dev = dev;
   77         sc->as_unit = device_get_unit(dev);
   78         sc->as_rid = 0;
   79         sc->as_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
   80             &sc->as_rid, RF_ACTIVE);
   81         if (sc->as_res == NULL) {
   82                 device_printf(dev, "couldn't map memory\n");
   83                 return (ENXIO);
   84         }
   85         altera_sdcard_attach(sc);
   86         return (0);
   87 }
   88 
   89 static int
   90 altera_sdcard_nexus_detach(device_t dev)
   91 {
   92         struct altera_sdcard_softc *sc;
   93 
   94         sc = device_get_softc(dev);
   95         KASSERT(sc->as_res != NULL, ("%s: resources not allocated",
   96             __func__));
   97         altera_sdcard_detach(sc);
   98         bus_release_resource(dev, SYS_RES_MEMORY, sc->as_rid, sc->as_res);
   99         return (0);
  100 }
  101 
  102 static device_method_t altera_sdcard_nexus_methods[] = {
  103         DEVMETHOD(device_probe,         altera_sdcard_nexus_probe),
  104         DEVMETHOD(device_attach,        altera_sdcard_nexus_attach),
  105         DEVMETHOD(device_detach,        altera_sdcard_nexus_detach),
  106         { 0, 0 }
  107 };
  108 
  109 static driver_t altera_sdcard_nexus_driver = {
  110         "altera_sdcardc",
  111         altera_sdcard_nexus_methods,
  112         sizeof(struct altera_sdcard_softc),
  113 };
  114 
  115 DRIVER_MODULE(altera_sdcard, nexus, altera_sdcard_nexus_driver,
  116     altera_sdcard_devclass, 0, 0);

Cache object: 31811399a1435a3068d290828bac9d7b


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