rtc.c revision 1.2.2.2
1 1.2.2.2 ad /* $NetBSD: rtc.c,v 1.2.2.2 2006/11/18 21:29:32 ad Exp $ */ 2 1.2.2.2 ad 3 1.2.2.2 ad /* 4 1.2.2.2 ad * Copyright (c) 1992, 1993 5 1.2.2.2 ad * The Regents of the University of California. All rights reserved. 6 1.2.2.2 ad * Copyright (c) 1994 Gordon W. Ross 7 1.2.2.2 ad * Copyright (c) 1993 Adam Glass 8 1.2.2.2 ad * Copyright (c) 1996 Paul Kranenburg 9 1.2.2.2 ad * Copyright (c) 1996 10 1.2.2.2 ad * The President and Fellows of Harvard College. All rights reserved. 11 1.2.2.2 ad * 12 1.2.2.2 ad * This software was developed by the Computer Systems Engineering group 13 1.2.2.2 ad * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 14 1.2.2.2 ad * contributed to Berkeley. 15 1.2.2.2 ad * 16 1.2.2.2 ad * All advertising materials mentioning features or use of this software 17 1.2.2.2 ad * must display the following acknowledgement: 18 1.2.2.2 ad * This product includes software developed by Harvard University. 19 1.2.2.2 ad * This product includes software developed by the University of 20 1.2.2.2 ad * California, Lawrence Berkeley Laboratory. 21 1.2.2.2 ad * 22 1.2.2.2 ad * Redistribution and use in source and binary forms, with or without 23 1.2.2.2 ad * modification, are permitted provided that the following conditions 24 1.2.2.2 ad * are met: 25 1.2.2.2 ad * 26 1.2.2.2 ad * 1. Redistributions of source code must retain the above copyright 27 1.2.2.2 ad * notice, this list of conditions and the following disclaimer. 28 1.2.2.2 ad * 2. Redistributions in binary form must reproduce the above copyright 29 1.2.2.2 ad * notice, this list of conditions and the following disclaimer in the 30 1.2.2.2 ad * documentation and/or other materials provided with the distribution. 31 1.2.2.2 ad * 3. All advertising materials mentioning features or use of this software 32 1.2.2.2 ad * must display the following acknowledgement: 33 1.2.2.2 ad * This product includes software developed by the University of 34 1.2.2.2 ad * California, Berkeley and its contributors. 35 1.2.2.2 ad * This product includes software developed by Paul Kranenburg. 36 1.2.2.2 ad * This product includes software developed by Harvard University. 37 1.2.2.2 ad * 4. Neither the name of the University nor the names of its contributors 38 1.2.2.2 ad * may be used to endorse or promote products derived from this software 39 1.2.2.2 ad * without specific prior written permission. 40 1.2.2.2 ad * 41 1.2.2.2 ad * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 42 1.2.2.2 ad * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 1.2.2.2 ad * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 1.2.2.2 ad * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 45 1.2.2.2 ad * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 1.2.2.2 ad * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 1.2.2.2 ad * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 1.2.2.2 ad * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 1.2.2.2 ad * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 1.2.2.2 ad * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 1.2.2.2 ad * SUCH DAMAGE. 52 1.2.2.2 ad * 53 1.2.2.2 ad * @(#)clock.c 8.1 (Berkeley) 6/11/93 54 1.2.2.2 ad * from: NetBSD: clock.c,v 1.80 2006/09/03 22:27:45 gdamore Exp 55 1.2.2.2 ad * 56 1.2.2.2 ad */ 57 1.2.2.2 ad 58 1.2.2.2 ad #include <sys/cdefs.h> 59 1.2.2.2 ad __KERNEL_RCSID(0, "$NetBSD: rtc.c,v 1.2.2.2 2006/11/18 21:29:32 ad Exp $"); 60 1.2.2.2 ad 61 1.2.2.2 ad /* 62 1.2.2.2 ad * Clock driver for 'rtc' - mc146818 driver. 63 1.2.2.2 ad */ 64 1.2.2.2 ad 65 1.2.2.2 ad #include <sys/param.h> 66 1.2.2.2 ad #include <sys/kernel.h> 67 1.2.2.2 ad #include <sys/device.h> 68 1.2.2.2 ad #include <sys/proc.h> 69 1.2.2.2 ad 70 1.2.2.2 ad #include <machine/bus.h> 71 1.2.2.2 ad #include <machine/autoconf.h> 72 1.2.2.2 ad 73 1.2.2.2 ad #include <dev/clock_subr.h> 74 1.2.2.2 ad #include <dev/ic/mc146818reg.h> 75 1.2.2.2 ad #include <dev/ic/mc146818var.h> 76 1.2.2.2 ad 77 1.2.2.2 ad #include <dev/ebus/ebusreg.h> 78 1.2.2.2 ad #include <dev/ebus/ebusvar.h> 79 1.2.2.2 ad 80 1.2.2.2 ad static int rtc_ebus_match(struct device *, struct cfdata *, void *); 81 1.2.2.2 ad static void rtc_ebus_attach(struct device *, struct device *, void *); 82 1.2.2.2 ad 83 1.2.2.2 ad CFATTACH_DECL(rtc_ebus, sizeof(struct mc146818_softc), 84 1.2.2.2 ad rtc_ebus_match, rtc_ebus_attach, NULL, NULL); 85 1.2.2.2 ad 86 1.2.2.2 ad u_int rtc_read_reg(struct mc146818_softc *, u_int); 87 1.2.2.2 ad void rtc_write_reg(struct mc146818_softc *, u_int, u_int); 88 1.2.2.2 ad u_int rtc_getcent(struct mc146818_softc *); 89 1.2.2.2 ad void rtc_setcent(struct mc146818_softc *, u_int); 90 1.2.2.2 ad 91 1.2.2.2 ad static int 92 1.2.2.2 ad rtc_ebus_match(struct device *parent, struct cfdata *cf, void *aux) 93 1.2.2.2 ad { 94 1.2.2.2 ad struct ebus_attach_args *ea = aux; 95 1.2.2.2 ad 96 1.2.2.2 ad return (strcmp("rtc", ea->ea_name) == 0); 97 1.2.2.2 ad } 98 1.2.2.2 ad 99 1.2.2.2 ad /* 100 1.2.2.2 ad * `rtc' is a ds1287 on an ebus (actually an isa bus, but we use the 101 1.2.2.2 ad * ebus driver for isa.) So we can use ebus_wenable() but need to do 102 1.2.2.2 ad * different attach work and use different todr routines. It does not 103 1.2.2.2 ad * incorporate an IDPROM. 104 1.2.2.2 ad */ 105 1.2.2.2 ad 106 1.2.2.2 ad /* 107 1.2.2.2 ad * XXX the stupid ds1287 is not mapped directly but uses an address 108 1.2.2.2 ad * and a data reg so we cannot access the stuuupid thing w/o having 109 1.2.2.2 ad * write access to the registers. 110 1.2.2.2 ad * 111 1.2.2.2 ad * XXXX We really need to mutex register access! 112 1.2.2.2 ad */ 113 1.2.2.2 ad #define RTC_ADDR 0 114 1.2.2.2 ad #define RTC_DATA 1 115 1.2.2.2 ad u_int 116 1.2.2.2 ad rtc_read_reg(struct mc146818_softc *sc, u_int reg) 117 1.2.2.2 ad { 118 1.2.2.2 ad 119 1.2.2.2 ad bus_space_write_1(sc->sc_bst, sc->sc_bsh, RTC_ADDR, reg); 120 1.2.2.2 ad return (bus_space_read_1(sc->sc_bst, sc->sc_bsh, RTC_DATA)); 121 1.2.2.2 ad } 122 1.2.2.2 ad void 123 1.2.2.2 ad rtc_write_reg(struct mc146818_softc *sc, u_int reg, u_int val) 124 1.2.2.2 ad { 125 1.2.2.2 ad 126 1.2.2.2 ad bus_space_write_1(sc->sc_bst, sc->sc_bsh, RTC_ADDR, reg); 127 1.2.2.2 ad bus_space_write_1(sc->sc_bst, sc->sc_bsh, RTC_DATA, val); 128 1.2.2.2 ad } 129 1.2.2.2 ad 130 1.2.2.2 ad /* ARGSUSED */ 131 1.2.2.2 ad static void 132 1.2.2.2 ad rtc_ebus_attach(struct device *parent, struct device *self, void *aux) 133 1.2.2.2 ad { 134 1.2.2.2 ad struct mc146818_softc *sc = (void *)self; 135 1.2.2.2 ad struct ebus_attach_args *ea = aux; 136 1.2.2.2 ad char *model; 137 1.2.2.2 ad int sz; 138 1.2.2.2 ad 139 1.2.2.2 ad sc->sc_bst = ea->ea_bustag; 140 1.2.2.2 ad 141 1.2.2.2 ad /* hard code to 8K? */ 142 1.2.2.2 ad sz = ea->ea_reg[0].size; 143 1.2.2.2 ad 144 1.2.2.2 ad if (bus_space_map(sc->sc_bst, 145 1.2.2.2 ad EBUS_ADDR_FROM_REG(&ea->ea_reg[0]), 146 1.2.2.2 ad sz, 147 1.2.2.2 ad BUS_SPACE_MAP_LINEAR, 148 1.2.2.2 ad &sc->sc_bsh) != 0) { 149 1.2.2.2 ad printf("%s: can't map register\n", self->dv_xname); 150 1.2.2.2 ad return; 151 1.2.2.2 ad } 152 1.2.2.2 ad 153 1.2.2.2 ad model = prom_getpropstring(ea->ea_node, "model"); 154 1.2.2.2 ad #ifdef DIAGNOSTIC 155 1.2.2.2 ad if (model == NULL) 156 1.2.2.2 ad panic("clockattach_rtc: no model property"); 157 1.2.2.2 ad #endif 158 1.2.2.2 ad 159 1.2.2.2 ad /* Our TOD clock year 0 is 0 */ 160 1.2.2.2 ad sc->sc_year0 = 0; 161 1.2.2.2 ad sc->sc_flag = MC146818_NO_CENT_ADJUST; 162 1.2.2.2 ad sc->sc_mcread = rtc_read_reg; 163 1.2.2.2 ad sc->sc_mcwrite = rtc_write_reg; 164 1.2.2.2 ad sc->sc_getcent = rtc_getcent; 165 1.2.2.2 ad sc->sc_setcent = rtc_setcent; 166 1.2.2.2 ad mc146818_attach(sc); 167 1.2.2.2 ad 168 1.2.2.2 ad printf(": %s\n", model); 169 1.2.2.2 ad 170 1.2.2.2 ad /* 171 1.2.2.2 ad * Turn interrupts off, just in case. (Although they shouldn't 172 1.2.2.2 ad * be wired to an interrupt controller on sparcs). 173 1.2.2.2 ad */ 174 1.2.2.2 ad rtc_write_reg(sc, MC_REGB, MC_REGB_BINARY | MC_REGB_24HR); 175 1.2.2.2 ad 176 1.2.2.2 ad /* 177 1.2.2.2 ad * Apparently on some machines the TOD registers are on the same 178 1.2.2.2 ad * physical page as the COM registers. So we won't protect them. 179 1.2.2.2 ad */ 180 1.2.2.2 ad /*sc->sc_handle.todr_setwen = NULL;*/ 181 1.2.2.2 ad 182 1.2.2.2 ad todr_attach(&sc->sc_handle); 183 1.2.2.2 ad } 184 1.2.2.2 ad 185 1.2.2.2 ad /* 186 1.2.2.2 ad * MD mc146818 RTC todr routines. 187 1.2.2.2 ad */ 188 1.2.2.2 ad 189 1.2.2.2 ad /* Loooks like Sun stores the century info somewhere in CMOS RAM */ 190 1.2.2.2 ad #define MC_CENT 0x32 191 1.2.2.2 ad 192 1.2.2.2 ad u_int 193 1.2.2.2 ad rtc_getcent(sc) 194 1.2.2.2 ad struct mc146818_softc *sc; 195 1.2.2.2 ad { 196 1.2.2.2 ad 197 1.2.2.2 ad return rtc_read_reg(sc, MC_CENT); 198 1.2.2.2 ad } 199 1.2.2.2 ad void 200 1.2.2.2 ad rtc_setcent(sc, cent) 201 1.2.2.2 ad struct mc146818_softc *sc; 202 1.2.2.2 ad u_int cent; 203 1.2.2.2 ad { 204 1.2.2.2 ad 205 1.2.2.2 ad rtc_write_reg(sc, MC_CENT, cent); 206 1.2.2.2 ad } 207
Indexes created Thu Oct 02 14:10:14 GMT 2025