1/*- 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 7 * Copyright (c) 1996 8 * The President and Fellows of Harvard College. All rights reserved. 9 * 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. 13 * 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. 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions 20 * are met: 21 * 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. 34 * 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 45 * SUCH DAMAGE. 46 * 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 49 */ 50 51#include <sys/cdefs.h> 52__FBSDID("$FreeBSD$"); 53 54/* 55 * clock (eeprom) attaches at EBus, FireHose or SBus 56 */ 57 58#include <sys/param.h> 59#include <sys/systm.h> 60#include <sys/bus.h> 61#include <sys/eventhandler.h> 62#include <sys/kernel.h> 63#include <sys/lock.h> 64#include <sys/module.h> 65#include <sys/mutex.h> 66#include <sys/resource.h> 67 68#include <dev/ofw/ofw_bus.h> 69 70#include <machine/bus.h> 71#include <machine/resource.h> 72#include <machine/ver.h> 73 74#include <sys/rman.h> 75 76#include <dev/mk48txx/mk48txxvar.h> 77 78#include "clock_if.h" 79 80static devclass_t eeprom_devclass; 81 82static device_probe_t eeprom_probe; 83static device_attach_t eeprom_attach; 84 85static device_method_t eeprom_methods[] = { 86 /* Device interface */ 87 DEVMETHOD(device_probe, eeprom_probe), 88 DEVMETHOD(device_attach, eeprom_attach), 89 90 /* clock interface */ 91 DEVMETHOD(clock_gettime, mk48txx_gettime), 92 DEVMETHOD(clock_settime, mk48txx_settime), 93 94 DEVMETHOD_END 95}; 96 97static driver_t eeprom_driver = { 98 "eeprom", 99 eeprom_methods, 100 sizeof(struct mk48txx_softc), 101}; 102 103DRIVER_MODULE(eeprom, ebus, eeprom_driver, eeprom_devclass, 0, 0); 104DRIVER_MODULE(eeprom, fhc, eeprom_driver, eeprom_devclass, 0, 0); 105DRIVER_MODULE(eeprom, sbus, eeprom_driver, eeprom_devclass, 0, 0); 106 107static int 108eeprom_probe(device_t dev) 109{ 110 const char *name; 111 112 name = ofw_bus_get_name(dev); 113 if (strcmp(name, "eeprom") == 0 || 114 strcmp(name, "FJSV,eeprom") == 0) { 115 device_set_desc(dev, "EEPROM/clock"); 116 return (0); 117 } 118 return (ENXIO); 119} 120 121static int 122eeprom_attach(device_t dev) 123{ 124 struct mk48txx_softc *sc; 125 struct timespec ts; 126 int error, rid; 127 128 sc = device_get_softc(dev); 129 130 mtx_init(&sc->sc_mtx, "eeprom_mtx", NULL, MTX_DEF); 131 132 rid = 0; 133 sc->sc_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 134 RF_ACTIVE); 135 if (sc->sc_res == NULL) { 136 device_printf(dev, "cannot allocate resources\n"); 137 error = ENXIO; 138 goto fail_mtx; 139 } 140 141 if ((sc->sc_model = ofw_bus_get_model(dev)) == NULL) { 142 device_printf(dev, "cannot determine model\n"); 143 error = ENXIO; 144 goto fail_res; 145 } 146 147 /* Our TOD clock year 0 is 1968. */ 148 sc->sc_year0 = 1968; 149 /* Use default register read/write functions. */ 150 sc->sc_flag = 0; 151 /* 152 * Generally, if the `eeprom' node has a `watchdog-enable' property 153 * this indicates that the watchdog part of the MK48T59 is usable, 154 * i.e. its RST pin is connected to the WDR input of the CPUs or 155 * something. The `eeprom' nodes of E250, E450 and the clock board 156 * variant in Exx00 have such properties. For E250 and E450 the 157 * watchdog just works, for Exx00 the delivery of the reset signal 158 * apparently has to be additionally enabled elsewhere... 159 * The OFW environment variable `watchdog-reboot?' is ignored for 160 * these watchdogs as they always trigger a system reset when they 161 * time out and can't be made to issue a break to the boot monitor 162 * instead. 163 */ 164 if (OF_getproplen(ofw_bus_get_node(dev), "watchdog-enable") != -1 && 165 (strcmp(sparc64_model, "SUNW,Ultra-250") == 0 || 166 strcmp(sparc64_model, "SUNW,Ultra-4") == 0)) 167 sc->sc_flag |= MK48TXX_WDOG_REGISTER | MK48TXX_WDOG_ENABLE_WDS; 168 if ((error = mk48txx_attach(dev)) != 0) { 169 device_printf(dev, "cannot attach time of day clock\n"); 170 goto fail_res; 171 } 172 173 if (bootverbose) { 174 if (mk48txx_gettime(dev, &ts) != 0) 175 device_printf(dev, "invalid time"); 176 else 177 device_printf(dev, "current time: %ld.%09ld\n", 178 (long)ts.tv_sec, ts.tv_nsec); 179 } 180 181 return (0); 182 183 fail_res: 184 bus_release_resource(dev, SYS_RES_MEMORY, rid, sc->sc_res); 185 fail_mtx: 186 mtx_destroy(&sc->sc_mtx); 187 188 return (error); 189} 190