eeprom.c revision 190101
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: head/sys/sparc64/sparc64/eeprom.c 190101 2009-03-19 20:36:46Z marius $"); 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 KOBJMETHOD_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{ 110 111 if (strcmp("eeprom", ofw_bus_get_name(dev)) == 0) { 112 device_set_desc(dev, "EEPROM/clock"); 113 return (0); 114 } 115 return (ENXIO); 116} 117 118static int 119eeprom_attach(device_t dev) 120{ 121 struct mk48txx_softc *sc; 122 struct resource *res; 123 struct timespec ts; 124 int error, rid; 125 126 sc = device_get_softc(dev); 127 128 mtx_init(&sc->sc_mtx, "eeprom_mtx", NULL, MTX_DEF); 129 130 rid = 0; 131 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); 132 if (res == NULL) { 133 device_printf(dev, "cannot allocate resources\n"); 134 error = ENXIO; 135 goto fail_mtx; 136 } 137 sc->sc_bst = rman_get_bustag(res); 138 sc->sc_bsh = rman_get_bushandle(res); 139 140 if ((sc->sc_model = ofw_bus_get_model(dev)) == NULL) { 141 device_printf(dev, "cannot determine model\n"); 142 error = ENXIO; 143 goto fail_res; 144 } 145 146 /* Our TOD clock year 0 is 1968. */ 147 sc->sc_year0 = 1968; 148 /* Use default register read/write functions. */ 149 sc->sc_flag = 0; 150 /* 151 * Generally, if the `eeprom' node has a `watchdog-enable' property 152 * this indicates that the watchdog part of the MK48T59 is usable, 153 * i.e. its RST pin is connected to the WDR input of the CPUs or 154 * something. The `eeprom' nodes of E250, E450 and the clock board 155 * variant in Exx00 have such properties. For E250 and E450 the 156 * watchdog just works, for Exx00 the delivery of the reset signal 157 * apparently has to be additionally enabled elsewhere... 158 * The OFW environment variable `watchdog-reboot?' is ignored for 159 * these watchdogs as they always trigger a system reset when they 160 * time out and can't be made to issue a break to the boot monitor 161 * instead. 162 */ 163 if (OF_getproplen(ofw_bus_get_node(dev), "watchdog-enable") != -1 && 164 (strcmp(sparc64_model, "SUNW,Ultra-250") == 0 || 165 strcmp(sparc64_model, "SUNW,Ultra-4") == 0)) 166 sc->sc_flag |= MK48TXX_WDOG_REGISTER | MK48TXX_WDOG_ENABLE_WDS; 167 if ((error = mk48txx_attach(dev)) != 0) { 168 device_printf(dev, "cannot attach time of day clock\n"); 169 goto fail_res; 170 } 171 172 if (bootverbose) { 173 if (mk48txx_gettime(dev, &ts) != 0) 174 device_printf(dev, "invalid time"); 175 else 176 device_printf(dev, "current time: %ld.%09ld\n", 177 (long)ts.tv_sec, ts.tv_nsec); 178 } 179 180 return (0); 181 182 fail_res: 183 bus_release_resource(dev, SYS_RES_MEMORY, rid, res); 184 fail_mtx: 185 mtx_destroy(&sc->sc_mtx); 186 187 return (error); 188} 189