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[src/trunk]: src/sys/dev/i2c Added RICOH RS5C372[AB] Real Time Clock.
details: https://anonhg.NetBSD.org/src/rev/8a994ff4982e
branches: trunk
changeset: 583637:8a994ff4982e
user: nonaka <nonaka%NetBSD.org@localhost>
date: Tue Aug 16 11:09:12 2005 +0000
description:
Added RICOH RS5C372[AB] Real Time Clock.
diffstat:
sys/dev/i2c/files.i2c | 7 +-
sys/dev/i2c/rs5c372.c | 247 +++++++++++++++++++++++++++++++++++++++++++++++
sys/dev/i2c/rs5c372reg.h | 76 ++++++++++++++
3 files changed, 329 insertions(+), 1 deletions(-)
diffs (truncated from 349 to 300 lines):
diff -r e68b210b3ec7 -r 8a994ff4982e sys/dev/i2c/files.i2c
--- a/sys/dev/i2c/files.i2c Tue Aug 16 10:10:16 2005 +0000
+++ b/sys/dev/i2c/files.i2c Tue Aug 16 11:09:12 2005 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.i2c,v 1.4 2005/08/10 14:18:28 macallan Exp $
+# $NetBSD: files.i2c,v 1.5 2005/08/16 11:09:12 nonaka Exp $
define i2cbus { }
define i2cexec
@@ -69,3 +69,8 @@
device adm1030c: sysmon_envsys
attach adm1030c at iic
file dev/i2c/adm1030.c adm1030c
+
+# RICOH RS5C372[AB] Real Time Clock
+device rs5c372rtc
+attach rs5c372rtc at iic
+file dev/i2c/rs5c372.c rs5c372rtc
diff -r e68b210b3ec7 -r 8a994ff4982e sys/dev/i2c/rs5c372.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/i2c/rs5c372.c Tue Aug 16 11:09:12 2005 +0000
@@ -0,0 +1,247 @@
+/* $NetBSD: rs5c372.c,v 1.1 2005/08/16 11:09:12 nonaka Exp $ */
+
+/*
+ * Copyright (c) 2005 Kimihiro Nonaka
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
+ * 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.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <sys/kernel.h>
+#include <sys/fcntl.h>
+#include <sys/uio.h>
+#include <sys/conf.h>
+#include <sys/event.h>
+
+#include <dev/clock_subr.h>
+
+#include <dev/i2c/i2cvar.h>
+#include <dev/i2c/rs5c372reg.h>
+
+struct rs5c372rtc_softc {
+ struct device sc_dev;
+ i2c_tag_t sc_tag;
+ int sc_address;
+ struct todr_chip_handle sc_todr;
+};
+
+static int rs5c372rtc_match(struct device *, struct cfdata *, void *);
+static void rs5c372rtc_attach(struct device *, struct device *, void *);
+
+CFATTACH_DECL(rs5c372rtc, sizeof(struct rs5c372rtc_softc),
+ rs5c372rtc_match, rs5c372rtc_attach, NULL, NULL);
+
+static void rs5c372rtc_init(struct rs5c372rtc_softc *);
+static int rs5c372rtc_clock_read(struct rs5c372rtc_softc *, struct clock_ymdhms *);
+static int rs5c372rtc_clock_write(struct rs5c372rtc_softc *, struct clock_ymdhms *);
+static int rs5c372rtc_gettime(struct todr_chip_handle *, volatile struct timeval *);
+static int rs5c372rtc_settime(struct todr_chip_handle *, volatile struct timeval *);
+static int rs5c372rtc_getcal(struct todr_chip_handle *, int *);
+static int rs5c372rtc_setcal(struct todr_chip_handle *, int);
+
+static int
+rs5c372rtc_match(struct device *parent, struct cfdata *cf, void *arg)
+{
+ struct i2c_attach_args *ia = arg;
+
+ if (ia->ia_addr == RS5C372_ADDR)
+ return (1);
+ return (0);
+}
+
+static void
+rs5c372rtc_attach(struct device *parent, struct device *self, void *arg)
+{
+ struct rs5c372rtc_softc *sc = (struct rs5c372rtc_softc *)self;
+ struct i2c_attach_args *ia = arg;
+
+ aprint_naive(": Real-time Clock\n");
+ aprint_normal(": RICOH RS5C372[AB] Real-time Clock\n");
+
+ sc->sc_tag = ia->ia_tag;
+ sc->sc_address = ia->ia_addr;
+ sc->sc_todr.cookie = sc;
+ sc->sc_todr.todr_gettime = rs5c372rtc_gettime;
+ sc->sc_todr.todr_settime = rs5c372rtc_settime;
+ sc->sc_todr.todr_getcal = rs5c372rtc_getcal;
+ sc->sc_todr.todr_setcal = rs5c372rtc_setcal;
+ sc->sc_todr.todr_setwen = NULL;
+
+ todr_attach(&sc->sc_todr);
+
+ rs5c372rtc_init(sc);
+}
+
+static int
+rs5c372rtc_gettime(struct todr_chip_handle *ch, volatile struct timeval *tv)
+{
+ struct rs5c372rtc_softc *sc = ch->cookie;
+ struct clock_ymdhms dt, check;
+ int retries;
+
+ memset(&dt, 0, sizeof(dt));
+ memset(&check, 0, sizeof(check));
+
+ /*
+ * Since we don't support Burst Read, we have to read the clock twice
+ * until we get two consecutive identical results.
+ */
+ retries = 5;
+ do {
+ rs5c372rtc_clock_read(sc, &dt);
+ rs5c372rtc_clock_read(sc, &check);
+ } while (memcmp(&dt, &check, sizeof(check)) != 0 && --retries);
+
+ tv->tv_sec = clock_ymdhms_to_secs(&dt);
+ tv->tv_usec = 0;
+
+ return (0);
+}
+
+static int
+rs5c372rtc_settime(struct todr_chip_handle *ch, volatile struct timeval *tv)
+{
+ struct rs5c372rtc_softc *sc = ch->cookie;
+ struct clock_ymdhms dt;
+
+ clock_secs_to_ymdhms(tv->tv_sec, &dt);
+
+ if (rs5c372rtc_clock_write(sc, &dt) == 0)
+ return (-1);
+
+ return (0);
+}
+
+static int
+rs5c372rtc_setcal(struct todr_chip_handle *ch, int cal)
+{
+
+ return (EOPNOTSUPP);
+}
+
+static int
+rs5c372rtc_getcal(struct todr_chip_handle *ch, int *cal)
+{
+
+ return (EOPNOTSUPP);
+}
+
+static void
+rs5c372rtc_init(struct rs5c372rtc_softc *sc)
+{
+ uint8_t cmdbuf[2];
+
+ if (iic_acquire_bus(sc->sc_tag, I2C_F_POLL)) {
+ printf("%s: rs5c372rtc_init: failed to acquire I2C bus\n",
+ sc->sc_dev.dv_xname);
+ return;
+ }
+
+ cmdbuf[0] = (RS5C372_CONTROL2 << 4);
+ cmdbuf[1] = RS5C372_CONTROL2_24HRS;
+ if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_address,
+ cmdbuf, 1, &cmdbuf[1], 1, I2C_F_POLL)) {
+ iic_release_bus(sc->sc_tag, I2C_F_POLL);
+ printf("%s: rs5c372rtc_clock_read: failed to write control2\n",
+ sc->sc_dev.dv_xname);
+ return;
+ }
+
+ iic_release_bus(sc->sc_tag, I2C_F_POLL);
+}
+
+static int
+rs5c372rtc_clock_read(struct rs5c372rtc_softc *sc, struct clock_ymdhms *dt)
+{
+ uint8_t bcd[RS5C372_NRTC_REGS];
+ uint8_t cmdbuf[1];
+
+ if (iic_acquire_bus(sc->sc_tag, I2C_F_POLL)) {
+ printf("%s: rs5c372rtc_clock_read: failed to acquire I2C bus\n",
+ sc->sc_dev.dv_xname);
+ return (0);
+ }
+
+ cmdbuf[0] = (RS5C372_SECONDS << 4);
+ if (iic_exec(sc->sc_tag, I2C_OP_READ, sc->sc_address,
+ cmdbuf, 1, bcd, RS5C372_NRTC_REGS, I2C_F_POLL)) {
+ iic_release_bus(sc->sc_tag, I2C_F_POLL);
+ printf("%s: rs5c372rtc_clock_read: failed to read rtc\n",
+ sc->sc_dev.dv_xname);
+ return (0);
+ }
+
+ iic_release_bus(sc->sc_tag, I2C_F_POLL);
+
+ /*
+ * Convert the RS5C372's register values into something useable
+ */
+ dt->dt_sec = FROMBCD(bcd[RS5C372_SECONDS] & RS5C372_SECONDS_MASK);
+ dt->dt_min = FROMBCD(bcd[RS5C372_MINUTES] & RS5C372_MINUTES_MASK);
+ dt->dt_hour = FROMBCD(bcd[RS5C372_HOURS] & RS5C372_HOURS_24MASK);
+ dt->dt_day = FROMBCD(bcd[RS5C372_DATE] & RS5C372_DATE_MASK);
+ dt->dt_mon = FROMBCD(bcd[RS5C372_MONTH] & RS5C372_MONTH_MASK);
+ dt->dt_year = FROMBCD(bcd[RS5C372_YEAR]) + 2000;
+
+ return (1);
+}
+
+static int
+rs5c372rtc_clock_write(struct rs5c372rtc_softc *sc, struct clock_ymdhms *dt)
+{
+ uint8_t bcd[RS5C372_NRTC_REGS];
+ uint8_t cmdbuf[1];
+
+ /*
+ * Convert our time representation into something the RS5C372
+ * can understand.
+ */
+ bcd[RS5C372_SECONDS] = TOBCD(dt->dt_sec);
+ bcd[RS5C372_MINUTES] = TOBCD(dt->dt_min);
+ bcd[RS5C372_HOURS] = TOBCD(dt->dt_hour);
+ bcd[RS5C372_DATE] = TOBCD(dt->dt_day);
+ bcd[RS5C372_DAY] = TOBCD(dt->dt_wday);
+ bcd[RS5C372_MONTH] = TOBCD(dt->dt_mon);
+ bcd[RS5C372_YEAR] = TOBCD(dt->dt_year % 100);
+
+ if (iic_acquire_bus(sc->sc_tag, I2C_F_POLL)) {
+ printf("%s: rs5c372rtc_clock_write: failed to "
+ "acquire I2C bus\n", sc->sc_dev.dv_xname);
+ return (0);
+ }
+
+ cmdbuf[0] = (RS5C372_SECONDS << 4);
+ if (iic_exec(sc->sc_tag, I2C_OP_WRITE, sc->sc_address,
+ cmdbuf, 1, bcd, RS5C372_NRTC_REGS, I2C_F_POLL)) {
+ iic_release_bus(sc->sc_tag, I2C_F_POLL);
+ printf("%s: rs5c372rtc_clock_write: failed to write rtc\n",
+ sc->sc_dev.dv_xname);
+ return (0);
+ }
+
+ iic_release_bus(sc->sc_tag, I2C_F_POLL);
+
+ return (1);
+}
diff -r e68b210b3ec7 -r 8a994ff4982e sys/dev/i2c/rs5c372reg.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/i2c/rs5c372reg.h Tue Aug 16 11:09:12 2005 +0000
@@ -0,0 +1,76 @@
+/* $NetBSD: rs5c372reg.h,v 1.1 2005/08/16 11:09:12 nonaka Exp $ */
+
+/*
+ * Copyright (c) 2005 Kimihiro Nonaka
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
+ * 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.
+ */
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