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.
17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
29 * $NetBSD: mk48txx.c,v 1.25 2008/04/28 20:23:50 martin Exp $
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
36 * Mostek MK48T02, MK48T08, MK48T18, MK48T59 time-of-day chip subroutines
39 #include <sys/param.h>
40 #include <sys/systm.h>
42 #include <sys/clock.h>
43 #include <sys/eventhandler.h>
45 #include <sys/mutex.h>
47 #include <sys/watchdog.h>
49 #include <machine/bus.h>
51 #include <dev/mk48txx/mk48txxreg.h>
52 #include <dev/mk48txx/mk48txxvar.h>
56 static uint8_t mk48txx_def_nvrd(device_t dev, int off);
57 static void mk48txx_def_nvwr(device_t dev, int off, uint8_t v);
58 static void mk48txx_watchdog(void *arg, u_int cmd, int *error);
65 #define MK48TXX_EXT_REGISTERS 1 /* Has extended register set. */
66 } const mk48txx_models[] = {
67 { "mk48t02", MK48T02_CLKSZ, MK48T02_CLKOFF, 0 },
68 { "mk48t08", MK48T08_CLKSZ, MK48T08_CLKOFF, 0 },
69 { "mk48t18", MK48T18_CLKSZ, MK48T18_CLKOFF, 0 },
70 { "mk48t59", MK48T59_CLKSZ, MK48T59_CLKOFF, MK48TXX_EXT_REGISTERS },
74 mk48txx_attach(device_t dev)
76 struct mk48txx_softc *sc;
80 sc = device_get_softc(dev);
82 if (mtx_initialized(&sc->sc_mtx) == 0) {
83 device_printf(dev, "%s: mutex not initialized\n", __func__);
87 device_printf(dev, "model %s", sc->sc_model);
88 i = sizeof(mk48txx_models) / sizeof(mk48txx_models[0]);
90 if (strcmp(sc->sc_model, mk48txx_models[i].name) == 0) {
95 device_printf(dev, " (unsupported)\n");
99 sc->sc_nvramsz = mk48txx_models[i].nvramsz;
100 sc->sc_clkoffset = mk48txx_models[i].clkoff;
102 if (sc->sc_nvrd == NULL)
103 sc->sc_nvrd = mk48txx_def_nvrd;
104 if (sc->sc_nvwr == NULL)
105 sc->sc_nvwr = mk48txx_def_nvwr;
107 if (mk48txx_models[i].flags & MK48TXX_EXT_REGISTERS) {
108 mtx_lock(&sc->sc_mtx);
109 if ((*sc->sc_nvrd)(dev, sc->sc_clkoffset + MK48TXX_FLAGS) &
111 mtx_unlock(&sc->sc_mtx);
112 device_printf(dev, "%s: battery low\n", __func__);
115 mtx_unlock(&sc->sc_mtx);
118 if (sc->sc_flag & MK48TXX_NO_CENT_ADJUST) {
120 * Use MK48TXX_WDAY_CB instead of manually adjusting the
123 if (!(mk48txx_models[i].flags & MK48TXX_EXT_REGISTERS)) {
124 device_printf(dev, "%s: no century bit\n", __func__);
127 mtx_lock(&sc->sc_mtx);
128 wday = (*sc->sc_nvrd)
129 (dev, sc->sc_clkoffset + MK48TXX_IWDAY);
130 wday |= MK48TXX_WDAY_CEB;
132 (dev, sc->sc_clkoffset + MK48TXX_IWDAY, wday);
133 mtx_unlock(&sc->sc_mtx);
137 clock_register(dev, 1000000); /* 1 second resolution */
139 if ((sc->sc_flag & MK48TXX_WDOG_REGISTER) &&
140 (mk48txx_models[i].flags & MK48TXX_EXT_REGISTERS)) {
141 sc->sc_wet = EVENTHANDLER_REGISTER(watchdog_list,
142 mk48txx_watchdog, dev, 0);
144 "watchdog registered, timeout interval max. 128 sec\n");
151 * Get time-of-day and convert to a `struct timespec'
152 * Return 0 on success; an error number otherwise.
155 mk48txx_gettime(device_t dev, struct timespec *ts)
157 struct mk48txx_softc *sc;
163 sc = device_get_softc(dev);
164 clkoff = sc->sc_clkoffset;
166 mtx_lock(&sc->sc_mtx);
167 /* enable read (stop time) */
168 csr = (*sc->sc_nvrd)(dev, clkoff + MK48TXX_ICSR);
169 csr |= MK48TXX_CSR_READ;
170 (*sc->sc_nvwr)(dev, clkoff + MK48TXX_ICSR, csr);
172 #define FROMREG(reg, mask) ((*sc->sc_nvrd)(dev, clkoff + (reg)) & (mask))
175 ct.sec = FROMBCD(FROMREG(MK48TXX_ISEC, MK48TXX_SEC_MASK));
176 ct.min = FROMBCD(FROMREG(MK48TXX_IMIN, MK48TXX_MIN_MASK));
177 ct.hour = FROMBCD(FROMREG(MK48TXX_IHOUR, MK48TXX_HOUR_MASK));
178 ct.day = FROMBCD(FROMREG(MK48TXX_IDAY, MK48TXX_DAY_MASK));
180 /* Map dow from 1 - 7 to 0 - 6; FROMBCD() isn't necessary here. */
181 ct.dow = FROMREG(MK48TXX_IWDAY, MK48TXX_WDAY_MASK) - 1;
184 * Set dow = -1 because some drivers (for example the NetBSD and
185 * OpenBSD mk48txx(4)) don't set it correctly.
189 ct.mon = FROMBCD(FROMREG(MK48TXX_IMON, MK48TXX_MON_MASK));
190 year = FROMBCD(FROMREG(MK48TXX_IYEAR, MK48TXX_YEAR_MASK));
191 year += sc->sc_year0;
192 if (sc->sc_flag & MK48TXX_NO_CENT_ADJUST)
193 year += (FROMREG(MK48TXX_IWDAY, MK48TXX_WDAY_CB) >>
194 MK48TXX_WDAY_CB_SHIFT) * 100;
195 else if (year < POSIX_BASE_YEAR)
203 csr = (*sc->sc_nvrd)(dev, clkoff + MK48TXX_ICSR);
204 csr &= ~MK48TXX_CSR_READ;
205 (*sc->sc_nvwr)(dev, clkoff + MK48TXX_ICSR, csr);
206 mtx_unlock(&sc->sc_mtx);
208 return (clock_ct_to_ts(&ct, ts));
212 * Set the time-of-day clock based on the value of the `struct timespec' arg.
213 * Return 0 on success; an error number otherwise.
216 mk48txx_settime(device_t dev, struct timespec *ts)
218 struct mk48txx_softc *sc;
224 sc = device_get_softc(dev);
225 clkoff = sc->sc_clkoffset;
227 /* Accuracy is only one second. */
228 if (ts->tv_nsec >= 500000000)
231 clock_ts_to_ct(ts, &ct);
233 mtx_lock(&sc->sc_mtx);
235 csr = (*sc->sc_nvrd)(dev, clkoff + MK48TXX_ICSR);
236 csr |= MK48TXX_CSR_WRITE;
237 (*sc->sc_nvwr)(dev, clkoff + MK48TXX_ICSR, csr);
239 #define TOREG(reg, mask, val) \
240 ((*sc->sc_nvwr)(dev, clkoff + (reg), \
241 ((*sc->sc_nvrd)(dev, clkoff + (reg)) & ~(mask)) | \
244 TOREG(MK48TXX_ISEC, MK48TXX_SEC_MASK, TOBCD(ct.sec));
245 TOREG(MK48TXX_IMIN, MK48TXX_MIN_MASK, TOBCD(ct.min));
246 TOREG(MK48TXX_IHOUR, MK48TXX_HOUR_MASK, TOBCD(ct.hour));
247 /* Map dow from 0 - 6 to 1 - 7; TOBCD() isn't necessary here. */
248 TOREG(MK48TXX_IWDAY, MK48TXX_WDAY_MASK, ct.dow + 1);
249 TOREG(MK48TXX_IDAY, MK48TXX_DAY_MASK, TOBCD(ct.day));
250 TOREG(MK48TXX_IMON, MK48TXX_MON_MASK, TOBCD(ct.mon));
252 year = ct.year - sc->sc_year0;
253 if (sc->sc_flag & MK48TXX_NO_CENT_ADJUST) {
255 TOREG(MK48TXX_IWDAY, MK48TXX_WDAY_CB,
256 cent << MK48TXX_WDAY_CB_SHIFT);
258 } else if (year > 99)
260 TOREG(MK48TXX_IYEAR, MK48TXX_YEAR_MASK, TOBCD(year));
265 csr = (*sc->sc_nvrd)(dev, clkoff + MK48TXX_ICSR);
266 csr &= ~MK48TXX_CSR_WRITE;
267 (*sc->sc_nvwr)(dev, clkoff + MK48TXX_ICSR, csr);
268 mtx_unlock(&sc->sc_mtx);
273 mk48txx_def_nvrd(device_t dev, int off)
275 struct mk48txx_softc *sc;
277 sc = device_get_softc(dev);
278 return (bus_read_1(sc->sc_res, off));
282 mk48txx_def_nvwr(device_t dev, int off, uint8_t v)
284 struct mk48txx_softc *sc;
286 sc = device_get_softc(dev);
287 bus_write_1(sc->sc_res, off, v);
291 mk48txx_watchdog(void *arg, u_int cmd, int *error)
294 struct mk48txx_softc *sc;
298 sc = device_get_softc(dev);
300 t = cmd & WD_INTERVAL;
301 if (t >= 26 && t <= 37) {
303 if (t <= WD_TO_2SEC) {
304 wdog |= MK48TXX_WDOG_RB_1_16;
306 } else if (t <= WD_TO_8SEC) {
307 wdog |= MK48TXX_WDOG_RB_1_4;
309 } else if (t <= WD_TO_32SEC) {
310 wdog |= MK48TXX_WDOG_RB_1;
313 wdog |= MK48TXX_WDOG_RB_4;
317 MK48TXX_WDOG_BMB_MASK >> MK48TXX_WDOG_BMB_SHIFT)) <<
318 MK48TXX_WDOG_BMB_SHIFT;
319 if (sc->sc_flag & MK48TXX_WDOG_ENABLE_WDS)
320 wdog |= MK48TXX_WDOG_WDS;
325 mtx_lock(&sc->sc_mtx);
326 (*sc->sc_nvwr)(dev, sc->sc_clkoffset + MK48TXX_WDOG, wdog);
327 mtx_unlock(&sc->sc_mtx);