From 2ba8cd8f89676c8614ed69c31b859ebea6e34aa0 Mon Sep 17 00:00:00 2001 From: tsutsui Date: Wed, 29 Oct 2003 17:00:40 +0000 Subject: [PATCH] Add MI driver for mc146818 based time-of-day clock with todr(9) support. --- sys/conf/files | 7 +- sys/dev/ic/mc146818.c | 211 +++++++++++++++++++++++++++++++++++++++ sys/dev/ic/mc146818var.h | 48 +++++++++ 3 files changed, 265 insertions(+), 1 deletion(-) create mode 100644 sys/dev/ic/mc146818.c create mode 100644 sys/dev/ic/mc146818var.h diff --git a/sys/conf/files b/sys/conf/files index b4efca0553f1..077f5940d32b 100644 --- a/sys/conf/files +++ b/sys/conf/files @@ -1,4 +1,4 @@ -# $NetBSD: files,v 1.642 2003/10/17 18:16:42 cdi Exp $ +# $NetBSD: files,v 1.643 2003/10/29 17:00:40 tsutsui Exp $ # @(#)files.newconf 7.5 (Berkeley) 5/10/93 @@ -779,6 +779,11 @@ file dev/ic/intersil7170.c intersil7170 define mm58167 file dev/ic/mm58167.c mm58167 +# Motorola mc146818 (and compatible) time-of-day clock +# +define mc146818 +file dev/ic/mc146818.c mc146818 + # D-Link DL10019/10022 NE2000-compatible network interface subroutines # define dl10019 diff --git a/sys/dev/ic/mc146818.c b/sys/dev/ic/mc146818.c new file mode 100644 index 000000000000..b08eaa64c575 --- /dev/null +++ b/sys/dev/ic/mc146818.c @@ -0,0 +1,211 @@ +/* $NetBSD: mc146818.c,v 1.1 2003/10/29 17:00:40 tsutsui Exp $ */ + +/* + * Copyright (c) 2003 Izumi Tsutsui. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/* + * mc146818 and compatible time of day chip subroutines + */ + +#include +__KERNEL_RCSID(0, "$NetBSD: mc146818.c,v 1.1 2003/10/29 17:00:40 tsutsui Exp $"); + +#include +#include +#include +#include + +#include + +#include + +#include +#include + +int mc146818_gettime(todr_chip_handle_t, struct timeval *); +int mc146818_settime(todr_chip_handle_t, struct timeval *); +int mc146818_getcal(todr_chip_handle_t, int *); +int mc146818_setcal(todr_chip_handle_t, int); + +void +mc146818_attach(sc) + struct mc146818_softc *sc; +{ + todr_chip_handle_t handle; + +#ifdef DIAGNOSTIC + if (sc->sc_mcread == NULL || + sc->sc_mcwrite == NULL) + panic("mc146818_attach: invalid read/write functions"); +#endif + + printf(": mc146818 compatible time-of-day clock"); + + handle = &sc->sc_handle; + handle->cookie = sc; + handle->todr_gettime = mc146818_gettime; + handle->todr_settime = mc146818_settime; + handle->todr_getcal = mc146818_getcal; + handle->todr_setcal = mc146818_setcal; + handle->todr_setwen = NULL; +} + +/* + * todr_gettime function: + * Get time of day and convert it to a struct timeval. + * Return 0 on success, an error number othersize. + */ +int +mc146818_gettime(handle, tv) + todr_chip_handle_t handle; + struct timeval *tv; +{ + struct mc146818_softc *sc; + struct clock_ymdhms dt; + int s, timeout, cent, year; + + sc = handle->cookie; + + s = splclock(); /* XXX really needed? */ + + todr_wenable(handle, 1); + + timeout = 1000000; /* XXX how long should we wait? */ + for (;;) { + if ((*sc->sc_mcread)(sc, MC_REGA) & MC_REGA_UIP) + break; + if (--timeout < 0) { + printf("mc146818_gettime: timeout\n"); + return EBUSY; + } + } + + dt.dt_sec = (*sc->sc_mcread)(sc, MC_SEC); + dt.dt_min = (*sc->sc_mcread)(sc, MC_MIN); + dt.dt_hour = (*sc->sc_mcread)(sc, MC_HOUR); + dt.dt_wday = (*sc->sc_mcread)(sc, MC_DOW); + dt.dt_day = (*sc->sc_mcread)(sc, MC_DOM); + dt.dt_mon = (*sc->sc_mcread)(sc, MC_MONTH); + year = (*sc->sc_mcread)(sc, MC_YEAR); + if (sc->sc_getcent) { + cent = (*sc->sc_getcent)(sc); + year += cent * 100; + } + + year += sc->sc_year0; + if (year < POSIX_BASE_YEAR && + (sc->sc_flag & NO_CENTURY_ADJUST) == 0) + year += 100; + dt.dt_year = year; + + todr_wenable(handle, 0); + + splx(s); + + /* simple sanity checks */ + if (dt.dt_mon > 12 || dt.dt_day > 31 || + dt.dt_hour >= 24 || dt.dt_min >= 60 || dt.dt_sec >= 60) + return EIO; + + tv->tv_sec = clock_ymdhms_to_secs(&dt); + tv->tv_usec = 0; + return 0; +} + +/* + * todr_settime function: + * Set the time of day clock based on the value of the struct timeval arg. + * Return 0 on success, an error number othersize. + */ +int +mc146818_settime(handle, tv) + todr_chip_handle_t handle; + struct timeval *tv; +{ + struct mc146818_softc *sc; + struct clock_ymdhms dt; + int s, timeout, cent, year; + + sc = handle->cookie; + + /* Note: we ignore `tv_usec' */ + clock_secs_to_ymdhms(tv->tv_sec, &dt); + + s = splclock(); /* XXX really needed? */ + + todr_wenable(handle, 1); + + timeout = 1000000; /* XXX how long should we wait? */ + for (;;) { + if ((*sc->sc_mcread)(sc, MC_REGA) & MC_REGA_UIP) + break; + if (--timeout < 0) { + printf("mc146818_settime: timeout\n"); + return EBUSY; + } + } + + (*sc->sc_mcwrite)(sc, MC_SEC, dt.dt_sec); + (*sc->sc_mcwrite)(sc, MC_MIN, dt.dt_min); + (*sc->sc_mcwrite)(sc, MC_HOUR, dt.dt_hour); + (*sc->sc_mcwrite)(sc, MC_DOW, dt.dt_wday); + (*sc->sc_mcwrite)(sc, MC_DOM, dt.dt_day); + (*sc->sc_mcwrite)(sc, MC_MONTH, dt.dt_mon); + + if (sc->sc_setcent) { + cent = year / 100; + (*sc->sc_setcent)(sc, cent); + year -= cent * 100; + } + year = dt.dt_year - sc->sc_year0; + if (year > 99 && (sc->sc_flag & NO_CENTURY_ADJUST) == 0) + year -= 100; + (*sc->sc_mcwrite)(sc, MC_YEAR, year); + + todr_wenable(handle, 0); + + splx(s); + + return 0; +} + +int +mc146818_getcal(handle, vp) + todr_chip_handle_t handle; + int *vp; +{ + + return EOPNOTSUPP; +} + +int +mc146818_setcal(handle, v) + todr_chip_handle_t handle; + int v; +{ + + return EOPNOTSUPP; +} diff --git a/sys/dev/ic/mc146818var.h b/sys/dev/ic/mc146818var.h new file mode 100644 index 000000000000..5edff8101e4b --- /dev/null +++ b/sys/dev/ic/mc146818var.h @@ -0,0 +1,48 @@ +/* $NetBSD: mc146818var.h,v 1.1 2003/10/29 17:00:41 tsutsui Exp $ */ + +/* + * Copyright (c) 2003 Izumi Tsutsui. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +struct mc146818_softc { + struct device sc_dev; + + bus_space_tag_t sc_bst; /* bus space tag */ + bus_space_handle_t sc_bsh; /* bus space handle */ + + struct todr_chip_handle sc_handle; /* TODR handle */ + u_int sc_year0; /* year counter offset */ + u_int sc_flag; /* MD flags */ +#define NO_CENTURY_ADJUST 0x0001 /* don't adjust century */ + + /* MD chip register read/write functions */ + u_int (*sc_mcread)(struct mc146818_softc *, u_int); + void (*sc_mcwrite)(struct mc146818_softc *, u_int, u_int); + /* MD century get/set functions */ + u_int (*sc_getcent)(struct mc146818_softc *); + void (*sc_setcent)(struct mc146818_softc *, u_int); +}; + +void mc146818_attach(struct mc146818_softc *);