2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1994 Gordon W. Ross
5 * Copyright (c) 1993 Adam Glass
6 * Copyright (c) 1996 Paul Kranenburg
8 * The President and Fellows of Harvard College. All rights reserved.
10 * This software was developed by the Computer Systems Engineering group
11 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
12 * contributed to Berkeley.
14 * All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by Harvard University.
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
22 * 1. Redistributions of source code must retain the above copyright
23 * notice, this list of conditions and the following disclaimer.
24 * 2. Redistributions in binary form must reproduce the above copyright
25 * notice, this list of conditions and the following disclaimer in the
26 * documentation and/or other materials provided with the distribution.
27 * 3. All advertising materials mentioning features or use of this software
28 * must display the following acknowledgement:
29 * This product includes software developed by Paul Kranenburg.
30 * This product includes software developed by Harvard University.
31 * 4. Neither the name of the University nor the names of its contributors
32 * may be used to endorse or promote products derived from this software
33 * without specific prior written permission.
35 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
36 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
37 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
38 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
39 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
40 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
41 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
42 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
43 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
44 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
47 * from: @(#)clock.c 8.1 (Berkeley) 6/11/93
48 * from: NetBSD: clock.c,v 1.41 2001/07/24 19:29:25 eeh Exp
51 #include <sys/cdefs.h>
52 __FBSDID("$FreeBSD$");
55 * clock (eeprom) attaches at EBus, FireHose or SBus
58 #include <sys/param.h>
59 #include <sys/systm.h>
61 #include <sys/eventhandler.h>
62 #include <sys/kernel.h>
64 #include <sys/module.h>
65 #include <sys/mutex.h>
66 #include <sys/resource.h>
68 #include <dev/ofw/ofw_bus.h>
70 #include <machine/bus.h>
71 #include <machine/idprom.h>
72 #include <machine/resource.h>
73 #include <machine/ver.h>
77 #include <dev/mk48txx/mk48txxvar.h>
81 #define IDPROM_OFFSET 40
83 static devclass_t eeprom_devclass;
85 static device_probe_t eeprom_probe;
86 static device_attach_t eeprom_attach;
88 static device_method_t eeprom_methods[] = {
89 /* Device interface */
90 DEVMETHOD(device_probe, eeprom_probe),
91 DEVMETHOD(device_attach, eeprom_attach),
94 DEVMETHOD(clock_gettime, mk48txx_gettime),
95 DEVMETHOD(clock_settime, mk48txx_settime),
100 static driver_t eeprom_driver = {
103 sizeof(struct mk48txx_softc),
106 DRIVER_MODULE(eeprom, ebus, eeprom_driver, eeprom_devclass, 0, 0);
107 DRIVER_MODULE(eeprom, fhc, eeprom_driver, eeprom_devclass, 0, 0);
108 DRIVER_MODULE(eeprom, sbus, eeprom_driver, eeprom_devclass, 0, 0);
111 eeprom_probe(device_t dev)
114 if (strcmp("eeprom", ofw_bus_get_name(dev)) == 0) {
115 device_set_desc(dev, "EEPROM/clock");
122 eeprom_attach(device_t dev)
124 struct mk48txx_softc *sc;
125 struct resource *res;
130 sc = device_get_softc(dev);
131 bzero(sc, sizeof(struct mk48txx_softc));
133 mtx_init(&sc->sc_mtx, "eeprom_mtx", NULL, MTX_DEF);
136 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
138 device_printf(dev, "cannot allocate resources\n");
142 sc->sc_bst = rman_get_bustag(res);
143 sc->sc_bsh = rman_get_bushandle(res);
145 if ((sc->sc_model = ofw_bus_get_model(dev)) == NULL) {
146 device_printf(dev, "cannot determine model\n");
151 /* Our TOD clock year 0 is 1968. */
153 /* Use default register read/write functions. */
156 * Generally, if the `eeprom' node has a `watchdog-enable' property
157 * this indicates that the watchdog part of the MK48T59 is usable,
158 * i.e. its RST pin is connected to the WDR input of the CPUs or
159 * something. The `eeprom' nodes of E250, E450 and the clock board
160 * variant in Exx00 have such properties. For E250 and E450 the
161 * watchdog just works, for Exx00 the delivery of the reset signal
162 * apparently has to be additionally enabled elsewhere...
163 * The OFW environment variable `watchdog-reboot?' is ignored for
164 * these watchdogs as they always trigger a system reset when they
165 * time out and can't be made to issue a break to the boot monitor
168 if (OF_getproplen(ofw_bus_get_node(dev), "watchdog-enable") != -1 &&
169 (strcmp(sparc64_model, "SUNW,Ultra-250") == 0 ||
170 strcmp(sparc64_model, "SUNW,Ultra-4") == 0))
171 sc->sc_flag |= MK48TXX_WDOG_REGISTER | MK48TXX_WDOG_ENABLE_WDS;
172 if ((error = mk48txx_attach(dev)) != 0) {
173 device_printf(dev, "cannot attach time of day clock\n");
178 * Get the hostid from the NVRAM. This serves no real purpose other
179 * than being able to display it below as not all sparc64 models
180 * have an `eeprom' device and even some that do store the hostid
181 * elsewhere. The hostid in the NVRAM of the MK48Txx reads all zero
182 * on the latter models. A generic way to retrieve the hostid is to
183 * use the `idprom' node.
185 mtx_lock(&sc->sc_mtx);
186 h = bus_space_read_1(sc->sc_bst, sc->sc_bsh, sc->sc_nvramsz -
187 IDPROM_OFFSET + offsetof(struct idprom, id_machine)) << 24;
188 for (i = 0; i < 3; i++) {
189 h |= bus_space_read_1(sc->sc_bst, sc->sc_bsh, sc->sc_nvramsz -
190 IDPROM_OFFSET + offsetof(struct idprom, id_hostid[i])) <<
193 mtx_unlock(&sc->sc_mtx);
195 device_printf(dev, "hostid %x\n", (u_int)h);
198 mk48txx_gettime(dev, &ts);
199 device_printf(dev, "current time: %ld.%09ld\n", (long)ts.tv_sec,
206 bus_release_resource(dev, SYS_RES_MEMORY, rid, res);
208 mtx_destroy(&sc->sc_mtx);