/* $NetBSD: wdog.c,v 1.7 2011/07/10 00:03:53 matt Exp $ */ /*- * Copyright (c) 2006 Urbana-Champaign Independent Media Center. * Copyright (c) 2006 Garrett D'Amore. * All rights reserved. * * Portions of this code were written by Garrett D'Amore for the * Champaign-Urbana Community Wireless Network Project. * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials provided * with the distribution. * 3. All advertising materials mentioning features or use of this * software must display the following acknowledgements: * This product includes software developed by the Urbana-Champaign * Independent Media Center. * This product includes software developed by Garrett D'Amore. * 4. Urbana-Champaign Independent Media Center's name and Garrett * D'Amore's name may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE URBANA-CHAMPAIGN INDEPENDENT * MEDIA CENTER AND GARRETT D'AMORE ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE URBANA-CHAMPAIGN INDEPENDENT * MEDIA CENTER OR GARRETT D'AMORE BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (c) 2002 Wasabi Systems, Inc. * All rights reserved. * * Written by Jason R. Thorpe and Simon Burge for Wasabi Systems, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed for the NetBSD Project by * Wasabi Systems, Inc. * 4. The name of Wasabi Systems, Inc. may not be used to endorse * or promote products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Watchdog timer support for the AR531x. */ #include __KERNEL_RCSID(0, "$NetBSD: wdog.c,v 1.7 2011/07/10 00:03:53 matt Exp $"); #include #include #include #include #include #include #ifndef WDOG_DEFAULT_PERIOD #define WDOG_DEFAULT_PERIOD 5 #endif static int wdog_match(device_t, cfdata_t, void *); static void wdog_attach(device_t, device_t, void *); static int wdog_tickle(struct sysmon_wdog *); static int wdog_setmode(struct sysmon_wdog *); struct wdog_softc { struct sysmon_wdog sc_smw; int sc_wdog_period; int sc_wdog_max; uint32_t sc_wdog_reload; uint32_t sc_mult; }; CFATTACH_DECL_NEW(wdog, sizeof(struct wdog_softc), wdog_match, wdog_attach, NULL, NULL); static int wdog_match(device_t parent, struct cfdata *cf, void *aux) { return (1); } static void wdog_attach(device_t parent, device_t self, void *aux) { struct wdog_softc *sc = device_private(self); sc->sc_mult = atheros_get_bus_freq(); sc->sc_wdog_period = WDOG_DEFAULT_PERIOD; sc->sc_wdog_max = 0xffffffffU / sc->sc_mult; sc->sc_wdog_reload = sc->sc_wdog_period * sc->sc_mult; aprint_normal(": %d second period\n", sc->sc_wdog_period); sc->sc_smw.smw_name = device_xname(self); sc->sc_smw.smw_cookie = sc; sc->sc_smw.smw_setmode = wdog_setmode; sc->sc_smw.smw_tickle = wdog_tickle; sc->sc_smw.smw_period = sc->sc_wdog_period; if (sysmon_wdog_register(&sc->sc_smw) != 0) { aprint_error_dev(self, "unable to register with sysmon\n"); } } static int wdog_tickle(struct sysmon_wdog *smw) { struct wdog_softc *sc = smw->smw_cookie; atheros_wdog_reload(sc->sc_wdog_reload); return (0); } static int wdog_setmode(struct sysmon_wdog *smw) { struct wdog_softc *sc = smw->smw_cookie; if ((smw->smw_mode & WDOG_MODE_MASK) == WDOG_MODE_DISARMED) { atheros_wdog_reload(0); } else { if (smw->smw_period == WDOG_PERIOD_DEFAULT) smw->smw_period = sc->sc_wdog_period; else if (smw->smw_period != sc->sc_wdog_period) { /* * we can't set watchdog periods in excess of * the processor maximum. */ if (smw->smw_period > sc->sc_wdog_max) { return EOPNOTSUPP; } sc->sc_wdog_period = smw->smw_period; sc->sc_wdog_reload = sc->sc_wdog_period * sc->sc_mult; } atheros_wdog_reload(sc->sc_wdog_reload); } return (0); }