bedc4e0571
- Add support for storing the century in MK48TXX_WDAY_CB on MK48Txx with extended registers when the MK48TXX_NO_CENT_ADJUST flag is set (and which is termed somewhat confusing as it actually means don't manually adjust the century in the driver). - Add the MI part of interfacing the watchdog functionality of MK48Txx with extended registers with watchdog(9). This is inspired by the SunOS/Solaris drivers for the 'eeprom' devices also having watchdog support. I actually expected this to work out of the box on Sun Exx00 machines with 'eeprom' devices which have a 'watchdog-enable' property. On terminal count of the the watchdog timer however only the MK48TXX_FLAGS_WDF bit rises but the reset signal and the interrupt respectively (depending on whether the MK48TXX_WDOG_WDS bit of the chip and the MK48TXX_WDOG_ENABLE_WDS flag of the driver respectively is set) goes nowhere. Apparently passing the reset signal on to the WDR line of the CPUs has to be enabled somewhere else but we don't have documentation for the Exx00 specific controllers. I decided to commit this nevertheless so it can be enabled in the eeprom(4) front-end later in e.g. 6.0-STABLE without breaking the API. Besides the Exx00 the watchdog part of the MK48Txx should also work on E250 and E450. Possibly also without extra fiddling on these machines but I haven't found someone willing to give it a try on such a machine so far. - Use uintXX_t instead of u_intXX_t, use __func__ instead of hardcoded function names in error strings.
325 lines
9.1 KiB
C
325 lines
9.1 KiB
C
/*-
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* Copyright (c) 2000 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Paul Kranenburg.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* from: NetBSD: mk48txx.c,v 1.15 2004/07/05 09:24:31 pk Exp
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Mostek MK48T02, MK48T08, MK48T18, MK48T59 time-of-day chip subroutines.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/clock.h>
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#include <sys/eventhandler.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/watchdog.h>
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#include <machine/bus.h>
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#include <dev/mk48txx/mk48txxreg.h>
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#include <dev/mk48txx/mk48txxvar.h>
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#include "clock_if.h"
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static uint8_t mk48txx_def_nvrd(device_t, int);
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static void mk48txx_def_nvwr(device_t, int, uint8_t);
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static void mk48txx_watchdog(void *, u_int, int *);
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struct {
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const char *name;
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bus_size_t nvramsz;
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bus_size_t clkoff;
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int flags;
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#define MK48TXX_EXT_REGISTERS 1 /* Has extended register set */
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} mk48txx_models[] = {
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{ "mk48t02", MK48T02_CLKSZ, MK48T02_CLKOFF, 0 },
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{ "mk48t08", MK48T08_CLKSZ, MK48T08_CLKOFF, 0 },
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{ "mk48t18", MK48T18_CLKSZ, MK48T18_CLKOFF, 0 },
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{ "mk48t59", MK48T59_CLKSZ, MK48T59_CLKOFF, MK48TXX_EXT_REGISTERS },
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};
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int
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mk48txx_attach(device_t dev)
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{
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struct mk48txx_softc *sc;
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int i;
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uint8_t wday;
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sc = device_get_softc(dev);
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if (mtx_initialized(&sc->sc_mtx) == 0) {
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device_printf(dev, "%s: mutex not initialized\n", __func__);
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return (ENXIO);
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}
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device_printf(dev, "model %s", sc->sc_model);
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i = sizeof(mk48txx_models) / sizeof(mk48txx_models[0]);
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while (--i >= 0) {
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if (strcmp(sc->sc_model, mk48txx_models[i].name) == 0) {
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break;
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}
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}
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if (i < 0) {
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device_printf(dev, " (unsupported)\n");
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return (ENXIO);
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}
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printf("\n");
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sc->sc_nvramsz = mk48txx_models[i].nvramsz;
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sc->sc_clkoffset = mk48txx_models[i].clkoff;
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if (sc->sc_nvrd == NULL)
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sc->sc_nvrd = mk48txx_def_nvrd;
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if (sc->sc_nvwr == NULL)
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sc->sc_nvwr = mk48txx_def_nvwr;
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if (mk48txx_models[i].flags & MK48TXX_EXT_REGISTERS) {
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mtx_lock(&sc->sc_mtx);
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if ((*sc->sc_nvrd)(dev, sc->sc_clkoffset + MK48TXX_FLAGS) &
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MK48TXX_FLAGS_BL) {
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mtx_unlock(&sc->sc_mtx);
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device_printf(dev, "%s: battery low\n", __func__);
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return (ENXIO);
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}
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mtx_unlock(&sc->sc_mtx);
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}
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if (sc->sc_flag & MK48TXX_NO_CENT_ADJUST) {
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/*
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* Use MK48TXX_WDAY_CB instead of manually adjusting the
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* century.
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*/
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if (!(mk48txx_models[i].flags & MK48TXX_EXT_REGISTERS)) {
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device_printf(dev, "%s: no century bit\n", __func__);
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return (ENXIO);
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} else {
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mtx_lock(&sc->sc_mtx);
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wday = (*sc->sc_nvrd)
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(dev, sc->sc_clkoffset + MK48TXX_IWDAY);
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wday |= MK48TXX_WDAY_CEB;
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(*sc->sc_nvwr)
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(dev, sc->sc_clkoffset + MK48TXX_IWDAY, wday);
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mtx_unlock(&sc->sc_mtx);
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}
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}
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clock_register(dev, 1000000); /* 1 second resolution. */
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if ((sc->sc_flag & MK48TXX_WDOG_REGISTER) &&
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(mk48txx_models[i].flags & MK48TXX_EXT_REGISTERS)) {
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sc->sc_wet = EVENTHANDLER_REGISTER(watchdog_list,
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mk48txx_watchdog, dev, 0);
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device_printf(dev,
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"watchdog registered, timeout intervall max. 128 sec\n");
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}
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return (0);
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}
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/*
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* Get time-of-day and convert to a `struct timespec'
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* Return 0 on success; an error number otherwise.
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*/
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int
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mk48txx_gettime(device_t dev, struct timespec *ts)
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{
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struct mk48txx_softc *sc;
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bus_size_t clkoff;
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struct clocktime ct;
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int year;
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uint8_t csr;
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sc = device_get_softc(dev);
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clkoff = sc->sc_clkoffset;
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mtx_lock(&sc->sc_mtx);
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/* enable read (stop time) */
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csr = (*sc->sc_nvrd)(dev, clkoff + MK48TXX_ICSR);
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csr |= MK48TXX_CSR_READ;
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(*sc->sc_nvwr)(dev, clkoff + MK48TXX_ICSR, csr);
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#define FROMREG(reg, mask) ((*sc->sc_nvrd)(dev, clkoff + (reg)) & (mask))
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ct.nsec = 0;
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ct.sec = FROMBCD(FROMREG(MK48TXX_ISEC, MK48TXX_SEC_MASK));
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ct.min = FROMBCD(FROMREG(MK48TXX_IMIN, MK48TXX_MIN_MASK));
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ct.hour = FROMBCD(FROMREG(MK48TXX_IHOUR, MK48TXX_HOUR_MASK));
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ct.day = FROMBCD(FROMREG(MK48TXX_IDAY, MK48TXX_DAY_MASK));
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/* Map dow from 1 - 7 to 0 - 6; FROMBCD() isn't necessary here. */
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ct.dow = FROMREG(MK48TXX_IWDAY, MK48TXX_WDAY_MASK) - 1;
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ct.mon = FROMBCD(FROMREG(MK48TXX_IMON, MK48TXX_MON_MASK));
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year = FROMBCD(FROMREG(MK48TXX_IYEAR, MK48TXX_YEAR_MASK));
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year += sc->sc_year0;
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if (sc->sc_flag & MK48TXX_NO_CENT_ADJUST)
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year += (FROMREG(MK48TXX_IWDAY, MK48TXX_WDAY_CB) >>
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MK48TXX_WDAY_CB_SHIFT) * 100;
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else if (year < POSIX_BASE_YEAR)
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year += 100;
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#undef FROMREG
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ct.year = year;
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/* time wears on */
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csr = (*sc->sc_nvrd)(dev, clkoff + MK48TXX_ICSR);
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csr &= ~MK48TXX_CSR_READ;
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(*sc->sc_nvwr)(dev, clkoff + MK48TXX_ICSR, csr);
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mtx_unlock(&sc->sc_mtx);
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return (clock_ct_to_ts(&ct, ts));
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}
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/*
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* Set the time-of-day clock based on the value of the `struct timespec' arg.
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* Return 0 on success; an error number otherwise.
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*/
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int
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mk48txx_settime(device_t dev, struct timespec *ts)
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{
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struct mk48txx_softc *sc;
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bus_size_t clkoff;
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struct clocktime ct;
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uint8_t csr;
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int cent, year;
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sc = device_get_softc(dev);
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clkoff = sc->sc_clkoffset;
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/* Accuracy is only one second. */
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if (ts->tv_nsec >= 500000000)
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ts->tv_sec++;
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ts->tv_nsec = 0;
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clock_ts_to_ct(ts, &ct);
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mtx_lock(&sc->sc_mtx);
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/* enable write */
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csr = (*sc->sc_nvrd)(dev, clkoff + MK48TXX_ICSR);
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csr |= MK48TXX_CSR_WRITE;
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(*sc->sc_nvwr)(dev, clkoff + MK48TXX_ICSR, csr);
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#define TOREG(reg, mask, val) \
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((*sc->sc_nvwr)(dev, clkoff + (reg), \
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((*sc->sc_nvrd)(dev, clkoff + (reg)) & ~(mask)) | \
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((val) & (mask))))
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TOREG(MK48TXX_ISEC, MK48TXX_SEC_MASK, TOBCD(ct.sec));
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TOREG(MK48TXX_IMIN, MK48TXX_MIN_MASK, TOBCD(ct.min));
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TOREG(MK48TXX_IHOUR, MK48TXX_HOUR_MASK, TOBCD(ct.hour));
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/* Map dow from 0 - 6 to 1 - 7; TOBCD() isn't necessary here. */
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TOREG(MK48TXX_IWDAY, MK48TXX_WDAY_MASK, ct.dow + 1);
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TOREG(MK48TXX_IDAY, MK48TXX_DAY_MASK, TOBCD(ct.day));
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TOREG(MK48TXX_IMON, MK48TXX_MON_MASK, TOBCD(ct.mon));
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year = ct.year - sc->sc_year0;
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if (sc->sc_flag & MK48TXX_NO_CENT_ADJUST) {
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cent = year / 100;
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TOREG(MK48TXX_IWDAY, MK48TXX_WDAY_CB,
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cent << MK48TXX_WDAY_CB_SHIFT);
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year -= cent * 100;
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} else if (year > 99)
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year -= 100;
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TOREG(MK48TXX_IYEAR, MK48TXX_YEAR_MASK, TOBCD(year));
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#undef TOREG
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/* load them up */
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csr = (*sc->sc_nvrd)(dev, clkoff + MK48TXX_ICSR);
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csr &= ~MK48TXX_CSR_WRITE;
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(*sc->sc_nvwr)(dev, clkoff + MK48TXX_ICSR, csr);
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mtx_unlock(&sc->sc_mtx);
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return (0);
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}
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static uint8_t
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mk48txx_def_nvrd(device_t dev, int off)
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{
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struct mk48txx_softc *sc;
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sc = device_get_softc(dev);
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return (bus_space_read_1(sc->sc_bst, sc->sc_bsh, off));
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}
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static void
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mk48txx_def_nvwr(device_t dev, int off, uint8_t v)
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{
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struct mk48txx_softc *sc;
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sc = device_get_softc(dev);
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bus_space_write_1(sc->sc_bst, sc->sc_bsh, off, v);
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}
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static void
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mk48txx_watchdog(void *arg, u_int cmd, int *error)
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{
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device_t dev;
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struct mk48txx_softc *sc;
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uint8_t t, wdog;
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dev = arg;
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sc = device_get_softc(dev);
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wdog = 0;
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t = cmd & WD_INTERVAL;
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if (cmd != 0 && t >= 26 && t <= 37) {
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if (t <= WD_TO_2SEC) {
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wdog |= MK48TXX_WDOG_RB_1_16;
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t -= 26;
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} else if (t <= WD_TO_8SEC) {
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wdog |= MK48TXX_WDOG_RB_1_4;
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t -= WD_TO_250MS;
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} else if (t <= WD_TO_32SEC) {
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wdog |= MK48TXX_WDOG_RB_1;
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t -= WD_TO_1SEC;
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} else {
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wdog |= MK48TXX_WDOG_RB_4;
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t -= WD_TO_4SEC;
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}
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wdog |= (min(1 << t,
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MK48TXX_WDOG_BMB_MASK >> MK48TXX_WDOG_BMB_SHIFT)) <<
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MK48TXX_WDOG_BMB_SHIFT;
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if (sc->sc_flag & MK48TXX_WDOG_ENABLE_WDS)
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wdog |= MK48TXX_WDOG_WDS;
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*error = 0;
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}
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mtx_lock(&sc->sc_mtx);
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(*sc->sc_nvwr)(dev, sc->sc_clkoffset + MK48TXX_WDOG, wdog);
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mtx_unlock(&sc->sc_mtx);
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}
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