718cf2ccb9
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
333 lines
9.0 KiB
C
333 lines
9.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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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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*
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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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* $NetBSD: mk48txx.c,v 1.25 2008/04/28 20:23:50 martin 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, MK48T37 and MK48T59 time-of-day chip
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* 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/rman.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 dev, int off);
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static void mk48txx_def_nvwr(device_t dev, int off, uint8_t v);
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static void mk48txx_watchdog(void *arg, u_int cmd, int *error);
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static const 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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u_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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{ "mk48t37", MK48T37_CLKSZ, MK48T37_CLKOFF, MK48TXX_EXT_REGISTERS },
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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 interval 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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#if 0
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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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#else
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/*
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* Set dow = -1 because some drivers (for example the NetBSD and
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* OpenBSD mk48txx(4)) don't set it correctly.
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*/
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ct.dow = -1;
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#endif
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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_read_1(sc->sc_res, 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_write_1(sc->sc_res, 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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t = cmd & WD_INTERVAL;
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if (t >= 26 && t <= 37) {
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wdog = 0;
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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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} else {
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wdog = 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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