2 * Copyright (c) 2000 The NetBSD Foundation, Inc.
5 * This code is derived from software contributed to The NetBSD Foundation
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the NetBSD
19 * Foundation, Inc. and its contributors.
20 * 4. Neither the name of The NetBSD Foundation nor the names of its
21 * contributors may be used to endorse or promote products derived
22 * from this software without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
25 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
26 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
27 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
28 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
36 * from: NetBSD: mk48txx.c,v 1.15 2004/07/05 09:24:31 pk Exp
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD$");
43 * Mostek MK48T02, MK48T08, MK48T18, MK48T59 time-of-day chip subroutines.
46 #include <sys/param.h>
47 #include <sys/systm.h>
49 #include <sys/clock.h>
50 #include <sys/eventhandler.h>
52 #include <sys/mutex.h>
53 #include <sys/watchdog.h>
55 #include <machine/bus.h>
57 #include <dev/mk48txx/mk48txxreg.h>
58 #include <dev/mk48txx/mk48txxvar.h>
62 static uint8_t mk48txx_def_nvrd(device_t, int);
63 static void mk48txx_def_nvwr(device_t, int, uint8_t);
64 static void mk48txx_watchdog(void *, u_int, int *);
71 #define MK48TXX_EXT_REGISTERS 1 /* Has extended register set */
72 } mk48txx_models[] = {
73 { "mk48t02", MK48T02_CLKSZ, MK48T02_CLKOFF, 0 },
74 { "mk48t08", MK48T08_CLKSZ, MK48T08_CLKOFF, 0 },
75 { "mk48t18", MK48T18_CLKSZ, MK48T18_CLKOFF, 0 },
76 { "mk48t59", MK48T59_CLKSZ, MK48T59_CLKOFF, MK48TXX_EXT_REGISTERS },
80 mk48txx_attach(device_t dev)
82 struct mk48txx_softc *sc;
86 sc = device_get_softc(dev);
88 if (mtx_initialized(&sc->sc_mtx) == 0) {
89 device_printf(dev, "%s: mutex not initialized\n", __func__);
93 device_printf(dev, "model %s", sc->sc_model);
94 i = sizeof(mk48txx_models) / sizeof(mk48txx_models[0]);
96 if (strcmp(sc->sc_model, mk48txx_models[i].name) == 0) {
101 device_printf(dev, " (unsupported)\n");
105 sc->sc_nvramsz = mk48txx_models[i].nvramsz;
106 sc->sc_clkoffset = mk48txx_models[i].clkoff;
108 if (sc->sc_nvrd == NULL)
109 sc->sc_nvrd = mk48txx_def_nvrd;
110 if (sc->sc_nvwr == NULL)
111 sc->sc_nvwr = mk48txx_def_nvwr;
113 if (mk48txx_models[i].flags & MK48TXX_EXT_REGISTERS) {
114 mtx_lock(&sc->sc_mtx);
115 if ((*sc->sc_nvrd)(dev, sc->sc_clkoffset + MK48TXX_FLAGS) &
117 mtx_unlock(&sc->sc_mtx);
118 device_printf(dev, "%s: battery low\n", __func__);
121 mtx_unlock(&sc->sc_mtx);
124 if (sc->sc_flag & MK48TXX_NO_CENT_ADJUST) {
126 * Use MK48TXX_WDAY_CB instead of manually adjusting the
129 if (!(mk48txx_models[i].flags & MK48TXX_EXT_REGISTERS)) {
130 device_printf(dev, "%s: no century bit\n", __func__);
133 mtx_lock(&sc->sc_mtx);
134 wday = (*sc->sc_nvrd)
135 (dev, sc->sc_clkoffset + MK48TXX_IWDAY);
136 wday |= MK48TXX_WDAY_CEB;
138 (dev, sc->sc_clkoffset + MK48TXX_IWDAY, wday);
139 mtx_unlock(&sc->sc_mtx);
143 clock_register(dev, 1000000); /* 1 second resolution. */
145 if ((sc->sc_flag & MK48TXX_WDOG_REGISTER) &&
146 (mk48txx_models[i].flags & MK48TXX_EXT_REGISTERS)) {
147 sc->sc_wet = EVENTHANDLER_REGISTER(watchdog_list,
148 mk48txx_watchdog, dev, 0);
150 "watchdog registered, timeout interval max. 128 sec\n");
157 * Get time-of-day and convert to a `struct timespec'
158 * Return 0 on success; an error number otherwise.
161 mk48txx_gettime(device_t dev, struct timespec *ts)
163 struct mk48txx_softc *sc;
169 sc = device_get_softc(dev);
170 clkoff = sc->sc_clkoffset;
172 mtx_lock(&sc->sc_mtx);
173 /* enable read (stop time) */
174 csr = (*sc->sc_nvrd)(dev, clkoff + MK48TXX_ICSR);
175 csr |= MK48TXX_CSR_READ;
176 (*sc->sc_nvwr)(dev, clkoff + MK48TXX_ICSR, csr);
178 #define FROMREG(reg, mask) ((*sc->sc_nvrd)(dev, clkoff + (reg)) & (mask))
181 ct.sec = FROMBCD(FROMREG(MK48TXX_ISEC, MK48TXX_SEC_MASK));
182 ct.min = FROMBCD(FROMREG(MK48TXX_IMIN, MK48TXX_MIN_MASK));
183 ct.hour = FROMBCD(FROMREG(MK48TXX_IHOUR, MK48TXX_HOUR_MASK));
184 ct.day = FROMBCD(FROMREG(MK48TXX_IDAY, MK48TXX_DAY_MASK));
185 /* Map dow from 1 - 7 to 0 - 6; FROMBCD() isn't necessary here. */
186 ct.dow = FROMREG(MK48TXX_IWDAY, MK48TXX_WDAY_MASK) - 1;
187 ct.mon = FROMBCD(FROMREG(MK48TXX_IMON, MK48TXX_MON_MASK));
188 year = FROMBCD(FROMREG(MK48TXX_IYEAR, MK48TXX_YEAR_MASK));
189 year += sc->sc_year0;
190 if (sc->sc_flag & MK48TXX_NO_CENT_ADJUST)
191 year += (FROMREG(MK48TXX_IWDAY, MK48TXX_WDAY_CB) >>
192 MK48TXX_WDAY_CB_SHIFT) * 100;
193 else if (year < POSIX_BASE_YEAR)
201 csr = (*sc->sc_nvrd)(dev, clkoff + MK48TXX_ICSR);
202 csr &= ~MK48TXX_CSR_READ;
203 (*sc->sc_nvwr)(dev, clkoff + MK48TXX_ICSR, csr);
204 mtx_unlock(&sc->sc_mtx);
206 return (clock_ct_to_ts(&ct, ts));
210 * Set the time-of-day clock based on the value of the `struct timespec' arg.
211 * Return 0 on success; an error number otherwise.
214 mk48txx_settime(device_t dev, struct timespec *ts)
216 struct mk48txx_softc *sc;
222 sc = device_get_softc(dev);
223 clkoff = sc->sc_clkoffset;
225 /* Accuracy is only one second. */
226 if (ts->tv_nsec >= 500000000)
229 clock_ts_to_ct(ts, &ct);
231 mtx_lock(&sc->sc_mtx);
233 csr = (*sc->sc_nvrd)(dev, clkoff + MK48TXX_ICSR);
234 csr |= MK48TXX_CSR_WRITE;
235 (*sc->sc_nvwr)(dev, clkoff + MK48TXX_ICSR, csr);
237 #define TOREG(reg, mask, val) \
238 ((*sc->sc_nvwr)(dev, clkoff + (reg), \
239 ((*sc->sc_nvrd)(dev, clkoff + (reg)) & ~(mask)) | \
242 TOREG(MK48TXX_ISEC, MK48TXX_SEC_MASK, TOBCD(ct.sec));
243 TOREG(MK48TXX_IMIN, MK48TXX_MIN_MASK, TOBCD(ct.min));
244 TOREG(MK48TXX_IHOUR, MK48TXX_HOUR_MASK, TOBCD(ct.hour));
245 /* Map dow from 0 - 6 to 1 - 7; TOBCD() isn't necessary here. */
246 TOREG(MK48TXX_IWDAY, MK48TXX_WDAY_MASK, ct.dow + 1);
247 TOREG(MK48TXX_IDAY, MK48TXX_DAY_MASK, TOBCD(ct.day));
248 TOREG(MK48TXX_IMON, MK48TXX_MON_MASK, TOBCD(ct.mon));
250 year = ct.year - sc->sc_year0;
251 if (sc->sc_flag & MK48TXX_NO_CENT_ADJUST) {
253 TOREG(MK48TXX_IWDAY, MK48TXX_WDAY_CB,
254 cent << MK48TXX_WDAY_CB_SHIFT);
256 } else if (year > 99)
258 TOREG(MK48TXX_IYEAR, MK48TXX_YEAR_MASK, TOBCD(year));
263 csr = (*sc->sc_nvrd)(dev, clkoff + MK48TXX_ICSR);
264 csr &= ~MK48TXX_CSR_WRITE;
265 (*sc->sc_nvwr)(dev, clkoff + MK48TXX_ICSR, csr);
266 mtx_unlock(&sc->sc_mtx);
271 mk48txx_def_nvrd(device_t dev, int off)
273 struct mk48txx_softc *sc;
275 sc = device_get_softc(dev);
276 return (bus_space_read_1(sc->sc_bst, sc->sc_bsh, off));
280 mk48txx_def_nvwr(device_t dev, int off, uint8_t v)
282 struct mk48txx_softc *sc;
284 sc = device_get_softc(dev);
285 bus_space_write_1(sc->sc_bst, sc->sc_bsh, off, v);
289 mk48txx_watchdog(void *arg, u_int cmd, int *error)
292 struct mk48txx_softc *sc;
296 sc = device_get_softc(dev);
298 t = cmd & WD_INTERVAL;
299 if (t >= 26 && t <= 37) {
301 if (t <= WD_TO_2SEC) {
302 wdog |= MK48TXX_WDOG_RB_1_16;
304 } else if (t <= WD_TO_8SEC) {
305 wdog |= MK48TXX_WDOG_RB_1_4;
307 } else if (t <= WD_TO_32SEC) {
308 wdog |= MK48TXX_WDOG_RB_1;
311 wdog |= MK48TXX_WDOG_RB_4;
315 MK48TXX_WDOG_BMB_MASK >> MK48TXX_WDOG_BMB_SHIFT)) <<
316 MK48TXX_WDOG_BMB_SHIFT;
317 if (sc->sc_flag & MK48TXX_WDOG_ENABLE_WDS)
318 wdog |= MK48TXX_WDOG_WDS;
323 mtx_lock(&sc->sc_mtx);
324 (*sc->sc_nvwr)(dev, sc->sc_clkoffset + MK48TXX_WDOG, wdog);
325 mtx_unlock(&sc->sc_mtx);