2 * SPDX-License-Identifier: BSD-4-Clause
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 * Copyright (c) 1994 Gordon W. Ross
7 * Copyright (c) 1993 Adam Glass
8 * Copyright (c) 1996 Paul Kranenburg
10 * The President and Fellows of Harvard College. All rights reserved.
12 * This software was developed by the Computer Systems Engineering group
13 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
14 * contributed to Berkeley.
16 * All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Harvard University.
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
24 * 1. Redistributions of source code must retain the above copyright
25 * notice, this list of conditions and the following disclaimer.
26 * 2. Redistributions in binary form must reproduce the above copyright
27 * notice, this list of conditions and the following disclaimer in the
28 * documentation and/or other materials provided with the distribution.
29 * 3. All advertising materials mentioning features or use of this software
30 * must display the following acknowledgement:
31 * This product includes software developed by Paul Kranenburg.
32 * This product includes software developed by Harvard University.
33 * 4. Neither the name of the University nor the names of its contributors
34 * may be used to endorse or promote products derived from this software
35 * without specific prior written permission.
37 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
38 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
39 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
40 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
41 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
42 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
43 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
45 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
46 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
49 * from: @(#)clock.c 8.1 (Berkeley) 6/11/93
50 * from: NetBSD: clock.c,v 1.41 2001/07/24 19:29:25 eeh Exp
53 #include <sys/cdefs.h>
54 __FBSDID("$FreeBSD$");
57 * clock (eeprom) attaches at EBus, FireHose or SBus
60 #include <sys/param.h>
61 #include <sys/systm.h>
63 #include <sys/eventhandler.h>
64 #include <sys/kernel.h>
66 #include <sys/module.h>
67 #include <sys/mutex.h>
68 #include <sys/resource.h>
70 #include <dev/ofw/ofw_bus.h>
72 #include <machine/bus.h>
73 #include <machine/resource.h>
74 #include <machine/ver.h>
78 #include <dev/mk48txx/mk48txxvar.h>
82 static devclass_t eeprom_devclass;
84 static device_probe_t eeprom_probe;
85 static device_attach_t eeprom_attach;
87 static device_method_t eeprom_methods[] = {
88 /* Device interface */
89 DEVMETHOD(device_probe, eeprom_probe),
90 DEVMETHOD(device_attach, eeprom_attach),
93 DEVMETHOD(clock_gettime, mk48txx_gettime),
94 DEVMETHOD(clock_settime, mk48txx_settime),
99 static driver_t eeprom_driver = {
102 sizeof(struct mk48txx_softc),
105 DRIVER_MODULE(eeprom, ebus, eeprom_driver, eeprom_devclass, 0, 0);
106 DRIVER_MODULE(eeprom, fhc, eeprom_driver, eeprom_devclass, 0, 0);
107 DRIVER_MODULE(eeprom, sbus, eeprom_driver, eeprom_devclass, 0, 0);
110 eeprom_probe(device_t dev)
114 name = ofw_bus_get_name(dev);
115 if (strcmp(name, "eeprom") == 0 ||
116 strcmp(name, "FJSV,eeprom") == 0) {
117 device_set_desc(dev, "EEPROM/clock");
124 eeprom_attach(device_t dev)
126 struct mk48txx_softc *sc;
130 sc = device_get_softc(dev);
132 mtx_init(&sc->sc_mtx, "eeprom_mtx", NULL, MTX_DEF);
135 sc->sc_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
137 if (sc->sc_res == NULL) {
138 device_printf(dev, "cannot allocate resources\n");
143 if ((sc->sc_model = ofw_bus_get_model(dev)) == NULL) {
144 device_printf(dev, "cannot determine model\n");
149 /* Our TOD clock year 0 is 1968. */
151 /* Use default register read/write functions. */
154 * Generally, if the `eeprom' node has a `watchdog-enable' property
155 * this indicates that the watchdog part of the MK48T59 is usable,
156 * i.e. its RST pin is connected to the WDR input of the CPUs or
157 * something. The `eeprom' nodes of E250, E450 and the clock board
158 * variant in Exx00 have such properties. For E250 and E450 the
159 * watchdog just works, for Exx00 the delivery of the reset signal
160 * apparently has to be additionally enabled elsewhere...
161 * The OFW environment variable `watchdog-reboot?' is ignored for
162 * these watchdogs as they always trigger a system reset when they
163 * time out and can't be made to issue a break to the boot monitor
166 if (OF_getproplen(ofw_bus_get_node(dev), "watchdog-enable") != -1 &&
167 (strcmp(sparc64_model, "SUNW,Ultra-250") == 0 ||
168 strcmp(sparc64_model, "SUNW,Ultra-4") == 0))
169 sc->sc_flag |= MK48TXX_WDOG_REGISTER | MK48TXX_WDOG_ENABLE_WDS;
170 if ((error = mk48txx_attach(dev)) != 0) {
171 device_printf(dev, "cannot attach time of day clock\n");
176 if (mk48txx_gettime(dev, &ts) != 0)
177 device_printf(dev, "invalid time");
179 device_printf(dev, "current time: %ld.%09ld\n",
180 (long)ts.tv_sec, ts.tv_nsec);
186 bus_release_resource(dev, SYS_RES_MEMORY, rid, sc->sc_res);
188 mtx_destroy(&sc->sc_mtx);