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/mips/ingenic/jz4780_dme.c

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    1 /*-
    2  * Copyright 2015 Alexander Kabaev <kan@FreeBSD.org>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 /*
   28  * Ingenic JZ4780 NAND and External Memory Controller (NEMC) driver.
   29  *
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 __FBSDID("$FreeBSD: stable/12/sys/mips/ingenic/jz4780_dme.c 308857 2016-11-19 17:46:18Z br $");
   34 
   35 #include <sys/param.h>
   36 #include <sys/systm.h>
   37 #include <sys/conf.h>
   38 #include <sys/bus.h>
   39 #include <sys/kernel.h>
   40 #include <sys/module.h>
   41 #include <sys/lock.h>
   42 #include <sys/mutex.h>
   43 #include <sys/resource.h>
   44 #include <sys/rman.h>
   45 
   46 #include <machine/bus.h>
   47 
   48 #include <dev/fdt/fdt_common.h>
   49 #include <dev/ofw/ofw_bus.h>
   50 #include <dev/ofw/ofw_bus_subr.h>
   51 
   52 struct jz4780_dme_softc {
   53         device_t                dev;
   54         struct resource         *res[2];
   55 };
   56 
   57 static struct resource_spec jz4780_dme_spec[] = {
   58         { SYS_RES_MEMORY, 0, RF_ACTIVE },
   59         { SYS_RES_MEMORY, 1, RF_ACTIVE },
   60         { -1, 0 }
   61 };
   62 
   63 static int jz4780_dme_probe(device_t dev);
   64 static int jz4780_dme_attach(device_t dev);
   65 static int jz4780_dme_detach(device_t dev);
   66 
   67 static int
   68 jz4780_dme_probe(device_t dev)
   69 {
   70 
   71         if (!ofw_bus_status_okay(dev))
   72                 return (ENXIO);
   73 
   74         if (!ofw_bus_is_compatible(dev, "davicom,dm9000"))
   75                 return (ENXIO);
   76 
   77         device_set_desc(dev, "Davicom DM9000C 10/100BaseTX");
   78 
   79         return (BUS_PROBE_DEFAULT);
   80 }
   81 
   82 static int
   83 jz4780_dme_attach(device_t dev)
   84 {
   85         struct jz4780_dme_softc *sc = device_get_softc(dev);
   86 
   87         sc->dev = dev;
   88 
   89         if (bus_alloc_resources(dev, jz4780_dme_spec, sc->res)) {
   90                 device_printf(dev, "could not allocate resources for device\n");
   91                 return (ENXIO);
   92         }
   93 
   94         return (0);
   95 }
   96 
   97 static int
   98 jz4780_dme_detach(device_t dev)
   99 {
  100         struct jz4780_dme_softc *sc = device_get_softc(dev);
  101 
  102         bus_release_resources(dev, jz4780_dme_spec, sc->res);
  103         return (0);
  104 }
  105 
  106 static device_method_t jz4780_dme_methods[] = {
  107         /* Device interface */
  108         DEVMETHOD(device_probe,         jz4780_dme_probe),
  109         DEVMETHOD(device_attach,        jz4780_dme_attach),
  110         DEVMETHOD(device_detach,        jz4780_dme_detach),
  111 
  112         DEVMETHOD_END
  113 };
  114 
  115 static driver_t jz4780_dme_driver = {
  116         "dme",
  117         jz4780_dme_methods,
  118         sizeof(struct jz4780_dme_softc),
  119 };
  120 
  121 static devclass_t jz4780_dme_devclass;
  122 
  123 DRIVER_MODULE(jz4780_dme, simplebus, jz4780_dme_driver,
  124     jz4780_dme_devclass, 0, 0);

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