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/arm/freescale/vybrid/vf_mscm.c

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    1 /*-
    2  * Copyright (c) 2013 Ruslan Bukin <br@bsdpad.com>
    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  * Vybrid Family Miscellaneous System Control Module (MSCM)
   29  * Chapter 66, Vybrid Reference Manual, Rev. 5, 07/2013
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 __FBSDID("$FreeBSD: releng/11.2/sys/arm/freescale/vybrid/vf_mscm.c 331722 2018-03-29 02:50:57Z eadler $");
   34 
   35 #include <sys/param.h>
   36 #include <sys/systm.h>
   37 #include <sys/bus.h>
   38 #include <sys/kernel.h>
   39 #include <sys/module.h>
   40 #include <sys/malloc.h>
   41 #include <sys/rman.h>
   42 #include <sys/timeet.h>
   43 #include <sys/timetc.h>
   44 #include <sys/watchdog.h>
   45 
   46 #include <dev/fdt/fdt_common.h>
   47 #include <dev/ofw/openfirm.h>
   48 #include <dev/ofw/ofw_bus.h>
   49 #include <dev/ofw/ofw_bus_subr.h>
   50 
   51 #include <machine/bus.h>
   52 #include <machine/cpu.h>
   53 #include <machine/intr.h>
   54 
   55 #include <arm/freescale/vybrid/vf_common.h>
   56 
   57 #define VF_NINT 112     /* Total number of interrupts */
   58 
   59 /* Int Router Shared Peripheral Routing Control */
   60 #define MSCM_IRSPRC(n)  (0x880 + 2 * n)
   61 
   62 struct mscm_softc {
   63         struct resource         *res[1];
   64         bus_space_tag_t         bst;
   65         bus_space_handle_t      bsh;
   66 };
   67 
   68 static struct resource_spec mscm_spec[] = {
   69         { SYS_RES_MEMORY,       0,      RF_ACTIVE },
   70         { -1, 0 }
   71 };
   72 
   73 static int
   74 mscm_probe(device_t dev)
   75 {
   76 
   77         if (!ofw_bus_status_okay(dev))
   78                 return (ENXIO);
   79 
   80         if (!ofw_bus_is_compatible(dev, "fsl,mvf600-mscm"))
   81                 return (ENXIO);
   82 
   83         device_set_desc(dev, "Vybrid Family Miscellaneous System Control Module");
   84         return (BUS_PROBE_DEFAULT);
   85 }
   86 
   87 static int
   88 mscm_attach(device_t dev)
   89 {
   90         struct mscm_softc *sc;
   91         int i;
   92 
   93         sc = device_get_softc(dev);
   94 
   95         if (bus_alloc_resources(dev, mscm_spec, sc->res)) {
   96                 device_printf(dev, "could not allocate resources\n");
   97                 return (ENXIO);
   98         }
   99 
  100         /* Memory interface */
  101         sc->bst = rman_get_bustag(sc->res[0]);
  102         sc->bsh = rman_get_bushandle(sc->res[0]);
  103 
  104         /* Route all the interrupts to CP0 */
  105         for (i = 0; i < VF_NINT; i++)
  106                 WRITE2(sc, MSCM_IRSPRC(i), 1);
  107 
  108         return (0);
  109 }
  110 
  111 static device_method_t mscm_methods[] = {
  112         DEVMETHOD(device_probe,         mscm_probe),
  113         DEVMETHOD(device_attach,        mscm_attach),
  114         { 0, 0 }
  115 };
  116 
  117 static driver_t mscm_driver = {
  118         "mscm",
  119         mscm_methods,
  120         sizeof(struct mscm_softc),
  121 };
  122 
  123 static devclass_t mscm_devclass;
  124 
  125 DRIVER_MODULE(mscm, simplebus, mscm_driver, mscm_devclass, 0, 0);

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