2 * Copyright (c) 2004 Poul-Henning Kamp
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/systm.h>
35 #include <sys/kernel.h>
36 #include <sys/malloc.h>
37 #include <sys/module.h>
38 #include <sys/watchdog.h>
40 #include <machine/bus.h>
42 static struct cdev *wd_dev;
45 wd_ioctl(struct cdev *dev __unused, u_long cmd, caddr_t data,
46 int flags __unused, struct thread *td)
51 if (cmd != WDIOCPATPAT)
54 if (u & ~(WD_ACTIVE | WD_PASSIVE | WD_INTERVAL))
56 if ((u & (WD_ACTIVE | WD_PASSIVE)) == (WD_ACTIVE | WD_PASSIVE))
58 if ((u & (WD_ACTIVE | WD_PASSIVE)) == 0 && (u & WD_INTERVAL) > 0)
61 return (ENOSYS); /* XXX Not implemented yet */
62 if ((u & WD_INTERVAL) == WD_TO_NEVER) {
64 /* Assume all is well; watchdog signals failure. */
67 /* Assume no watchdog available; watchdog flags success */
70 EVENTHANDLER_INVOKE(watchdog_list, u, &error);
74 static struct cdevsw wd_cdevsw = {
75 .d_version = D_VERSION,
81 watchdog_modevent(module_t mod __unused, int type, void *data __unused)
85 wd_dev = make_dev(&wd_cdevsw, 0,
86 UID_ROOT, GID_WHEEL, 0600, _PATH_WATCHDOG);
98 DEV_MODULE(watchdog, watchdog_modevent, NULL);