Add MI driver for mc146818 based time-of-day clock with todr(9) support.
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tsutsui
parent
ae9ab55ceb
commit
2ba8cd8f89
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# $NetBSD: files,v 1.642 2003/10/17 18:16:42 cdi Exp $
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# $NetBSD: files,v 1.643 2003/10/29 17:00:40 tsutsui Exp $
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# @(#)files.newconf 7.5 (Berkeley) 5/10/93
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@ -779,6 +779,11 @@ file dev/ic/intersil7170.c intersil7170
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define mm58167
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file dev/ic/mm58167.c mm58167
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# Motorola mc146818 (and compatible) time-of-day clock
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#
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define mc146818
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file dev/ic/mc146818.c mc146818
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# D-Link DL10019/10022 NE2000-compatible network interface subroutines
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#
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define dl10019
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/* $NetBSD: mc146818.c,v 1.1 2003/10/29 17:00:40 tsutsui Exp $ */
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/*
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* Copyright (c) 2003 Izumi Tsutsui. All rights reserved.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* mc146818 and compatible time of day chip subroutines
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: mc146818.c,v 1.1 2003/10/29 17:00:40 tsutsui Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/errno.h>
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#include <machine/bus.h>
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#include <dev/clock_subr.h>
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#include <dev/ic/mc146818reg.h>
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#include <dev/ic/mc146818var.h>
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int mc146818_gettime(todr_chip_handle_t, struct timeval *);
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int mc146818_settime(todr_chip_handle_t, struct timeval *);
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int mc146818_getcal(todr_chip_handle_t, int *);
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int mc146818_setcal(todr_chip_handle_t, int);
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void
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mc146818_attach(sc)
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struct mc146818_softc *sc;
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{
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todr_chip_handle_t handle;
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#ifdef DIAGNOSTIC
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if (sc->sc_mcread == NULL ||
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sc->sc_mcwrite == NULL)
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panic("mc146818_attach: invalid read/write functions");
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#endif
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printf(": mc146818 compatible time-of-day clock");
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handle = &sc->sc_handle;
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handle->cookie = sc;
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handle->todr_gettime = mc146818_gettime;
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handle->todr_settime = mc146818_settime;
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handle->todr_getcal = mc146818_getcal;
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handle->todr_setcal = mc146818_setcal;
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handle->todr_setwen = NULL;
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}
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/*
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* todr_gettime function:
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* Get time of day and convert it to a struct timeval.
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* Return 0 on success, an error number othersize.
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*/
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int
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mc146818_gettime(handle, tv)
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todr_chip_handle_t handle;
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struct timeval *tv;
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{
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struct mc146818_softc *sc;
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struct clock_ymdhms dt;
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int s, timeout, cent, year;
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sc = handle->cookie;
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s = splclock(); /* XXX really needed? */
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todr_wenable(handle, 1);
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timeout = 1000000; /* XXX how long should we wait? */
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for (;;) {
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if ((*sc->sc_mcread)(sc, MC_REGA) & MC_REGA_UIP)
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break;
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if (--timeout < 0) {
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printf("mc146818_gettime: timeout\n");
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return EBUSY;
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}
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}
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dt.dt_sec = (*sc->sc_mcread)(sc, MC_SEC);
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dt.dt_min = (*sc->sc_mcread)(sc, MC_MIN);
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dt.dt_hour = (*sc->sc_mcread)(sc, MC_HOUR);
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dt.dt_wday = (*sc->sc_mcread)(sc, MC_DOW);
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dt.dt_day = (*sc->sc_mcread)(sc, MC_DOM);
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dt.dt_mon = (*sc->sc_mcread)(sc, MC_MONTH);
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year = (*sc->sc_mcread)(sc, MC_YEAR);
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if (sc->sc_getcent) {
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cent = (*sc->sc_getcent)(sc);
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year += cent * 100;
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}
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year += sc->sc_year0;
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if (year < POSIX_BASE_YEAR &&
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(sc->sc_flag & NO_CENTURY_ADJUST) == 0)
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year += 100;
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dt.dt_year = year;
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todr_wenable(handle, 0);
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splx(s);
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/* simple sanity checks */
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if (dt.dt_mon > 12 || dt.dt_day > 31 ||
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dt.dt_hour >= 24 || dt.dt_min >= 60 || dt.dt_sec >= 60)
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return EIO;
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tv->tv_sec = clock_ymdhms_to_secs(&dt);
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tv->tv_usec = 0;
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return 0;
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}
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/*
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* todr_settime function:
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* Set the time of day clock based on the value of the struct timeval arg.
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* Return 0 on success, an error number othersize.
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*/
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int
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mc146818_settime(handle, tv)
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todr_chip_handle_t handle;
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struct timeval *tv;
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{
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struct mc146818_softc *sc;
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struct clock_ymdhms dt;
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int s, timeout, cent, year;
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sc = handle->cookie;
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/* Note: we ignore `tv_usec' */
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clock_secs_to_ymdhms(tv->tv_sec, &dt);
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s = splclock(); /* XXX really needed? */
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todr_wenable(handle, 1);
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timeout = 1000000; /* XXX how long should we wait? */
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for (;;) {
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if ((*sc->sc_mcread)(sc, MC_REGA) & MC_REGA_UIP)
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break;
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if (--timeout < 0) {
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printf("mc146818_settime: timeout\n");
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return EBUSY;
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}
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}
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(*sc->sc_mcwrite)(sc, MC_SEC, dt.dt_sec);
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(*sc->sc_mcwrite)(sc, MC_MIN, dt.dt_min);
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(*sc->sc_mcwrite)(sc, MC_HOUR, dt.dt_hour);
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(*sc->sc_mcwrite)(sc, MC_DOW, dt.dt_wday);
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(*sc->sc_mcwrite)(sc, MC_DOM, dt.dt_day);
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(*sc->sc_mcwrite)(sc, MC_MONTH, dt.dt_mon);
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if (sc->sc_setcent) {
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cent = year / 100;
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(*sc->sc_setcent)(sc, cent);
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year -= cent * 100;
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}
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year = dt.dt_year - sc->sc_year0;
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if (year > 99 && (sc->sc_flag & NO_CENTURY_ADJUST) == 0)
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year -= 100;
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(*sc->sc_mcwrite)(sc, MC_YEAR, year);
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todr_wenable(handle, 0);
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splx(s);
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return 0;
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}
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int
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mc146818_getcal(handle, vp)
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todr_chip_handle_t handle;
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int *vp;
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{
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return EOPNOTSUPP;
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}
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int
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mc146818_setcal(handle, v)
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todr_chip_handle_t handle;
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int v;
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{
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return EOPNOTSUPP;
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}
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@ -0,0 +1,48 @@
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/* $NetBSD: mc146818var.h,v 1.1 2003/10/29 17:00:41 tsutsui Exp $ */
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/*
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* Copyright (c) 2003 Izumi Tsutsui. All rights reserved.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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struct mc146818_softc {
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struct device sc_dev;
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bus_space_tag_t sc_bst; /* bus space tag */
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bus_space_handle_t sc_bsh; /* bus space handle */
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struct todr_chip_handle sc_handle; /* TODR handle */
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u_int sc_year0; /* year counter offset */
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u_int sc_flag; /* MD flags */
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#define NO_CENTURY_ADJUST 0x0001 /* don't adjust century */
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/* MD chip register read/write functions */
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u_int (*sc_mcread)(struct mc146818_softc *, u_int);
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void (*sc_mcwrite)(struct mc146818_softc *, u_int, u_int);
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/* MD century get/set functions */
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u_int (*sc_getcent)(struct mc146818_softc *);
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void (*sc_setcent)(struct mc146818_softc *, u_int);
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};
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void mc146818_attach(struct mc146818_softc *);
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