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


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/arm/xscale/ixp425/ixp425_wdog.c

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 2006 Sam Leffler.  All rights reserved.
    3  *
    4  * Redistribution and use in source and binary forms, with or without
    5  * modification, are permitted provided that the following conditions
    6  * are met:
    7  * 1. Redistributions of source code must retain the above copyright
    8  *    notice, this list of conditions and the following disclaimer.
    9  * 2. Redistributions in binary form must reproduce the above copyright
   10  *    notice, this list of conditions and the following disclaimer in the
   11  *    documentation and/or other materials provided with the distribution.
   12  *
   13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   14  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   15  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   16  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   17  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   18  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   19  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   20  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   22  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   23  */
   24 #include <sys/cdefs.h>
   25 __FBSDID("$FreeBSD: releng/10.3/sys/arm/xscale/ixp425/ixp425_wdog.c 259329 2013-12-13 20:43:11Z ian $");
   26 
   27 /*
   28  * IXP4XX Watchdog Timer Support.
   29  */
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 #include <sys/kernel.h>
   33 #include <sys/module.h>
   34 #include <sys/time.h>
   35 #include <sys/bus.h>
   36 #include <sys/resource.h>
   37 #include <sys/rman.h>
   38 #include <sys/watchdog.h>
   39 
   40 #include <machine/bus.h>
   41 #include <machine/cpu.h>
   42 #include <machine/cpufunc.h>
   43 #include <machine/resource.h>
   44 #include <machine/intr.h>
   45 
   46 #include <arm/xscale/ixp425/ixp425reg.h>
   47 #include <arm/xscale/ixp425/ixp425var.h>
   48 
   49 struct ixpwdog_softc {
   50         device_t                sc_dev;
   51 };
   52 
   53 static __inline uint32_t
   54 RD4(struct ixpwdog_softc *sc, bus_size_t off)
   55 {
   56         return bus_space_read_4(&ixp425_bs_tag, IXP425_TIMER_VBASE, off);
   57 }
   58 
   59 static __inline void
   60 WR4(struct ixpwdog_softc *sc, bus_size_t off, uint32_t val)
   61 {
   62         bus_space_write_4(&ixp425_bs_tag, IXP425_TIMER_VBASE, off, val);
   63 }
   64 
   65 static void
   66 ixp425_watchdog(void *arg, u_int cmd, int *error)
   67 {
   68         struct ixpwdog_softc *sc = arg;
   69         u_int u = cmd & WD_INTERVAL;
   70 
   71         WR4(sc, IXP425_OST_WDOG_KEY, OST_WDOG_KEY_MAJICK);
   72         if (4 <= u && u <= 35) {
   73                 WR4(sc, IXP425_OST_WDOG_ENAB, 0);
   74                 /* approximate 66.66MHz cycles */
   75                 WR4(sc, IXP425_OST_WDOG, 2<<(u - 4));
   76                 /* NB: reset on timer expiration */
   77                 WR4(sc, IXP425_OST_WDOG_ENAB,
   78                     OST_WDOG_ENAB_CNT_ENA | OST_WDOG_ENAB_RST_ENA);
   79                 *error = 0;
   80         } else {
   81                 /* disable watchdog */
   82                 WR4(sc, IXP425_OST_WDOG_ENAB, 0);
   83         }
   84         WR4(sc, IXP425_OST_WDOG_KEY, 0);
   85 }
   86 
   87 static int
   88 ixpwdog_probe(device_t dev)
   89 {
   90         device_set_desc(dev, "IXP4XX Watchdog Timer");
   91         return (0);
   92 }
   93 
   94 static int
   95 ixpwdog_attach(device_t dev)
   96 {
   97         struct ixpwdog_softc *sc = device_get_softc(dev);
   98 
   99         sc->sc_dev = dev;
  100 
  101         EVENTHANDLER_REGISTER(watchdog_list, ixp425_watchdog, sc, 0);
  102         return (0);
  103 }
  104 
  105 static device_method_t ixpwdog_methods[] = {
  106         DEVMETHOD(device_probe,         ixpwdog_probe),
  107         DEVMETHOD(device_attach,        ixpwdog_attach),
  108         {0, 0},
  109 };
  110 
  111 static driver_t ixpwdog_driver = {
  112         "ixpwdog",
  113         ixpwdog_methods,
  114         sizeof(struct ixpwdog_softc),
  115 };
  116 static devclass_t ixpwdog_devclass;
  117 DRIVER_MODULE(ixpwdog, ixp, ixpwdog_driver, ixpwdog_devclass, 0, 0);

Cache object: dea69b4e3816ba4669bee33fef5bdb5e


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.