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[src/trunk]: src/sys Add MI driver for mc146818 based time-of-day clock with ...
details: https://anonhg.NetBSD.org/src/rev/9d02c02f5223
branches: trunk
changeset: 554538:9d02c02f5223
user: tsutsui <tsutsui%NetBSD.org@localhost>
date: Wed Oct 29 17:00:40 2003 +0000
description:
Add MI driver for mc146818 based time-of-day clock with todr(9) support.
diffstat:
sys/conf/files | 7 +-
sys/dev/ic/mc146818.c | 211 +++++++++++++++++++++++++++++++++++++++++++++++
sys/dev/ic/mc146818var.h | 48 ++++++++++
3 files changed, 265 insertions(+), 1 deletions(-)
diffs (288 lines):
diff -r 376228cba428 -r 9d02c02f5223 sys/conf/files
--- a/sys/conf/files Wed Oct 29 13:52:25 2003 +0000
+++ b/sys/conf/files Wed Oct 29 17:00:40 2003 +0000
@@ -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 @@
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 -r 376228cba428 -r 9d02c02f5223 sys/dev/ic/mc146818.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/ic/mc146818.c Wed Oct 29 17:00:40 2003 +0000
@@ -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 <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: mc146818.c,v 1.1 2003/10/29 17:00:40 tsutsui Exp $");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <sys/errno.h>
+
+#include <machine/bus.h>
+
+#include <dev/clock_subr.h>
+
+#include <dev/ic/mc146818reg.h>
+#include <dev/ic/mc146818var.h>
+
+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 -r 376228cba428 -r 9d02c02f5223 sys/dev/ic/mc146818var.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/ic/mc146818var.h Wed Oct 29 17:00:40 2003 +0000
@@ -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 *);
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