Source-Changes-HG archive

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]

[src/trunk]: src/sys/dev/i2c Add pcf8563rtc(4), yet another I2C real time clock.



details:   https://anonhg.NetBSD.org/src/rev/c593b997d829
branches:  trunk
changeset: 761236:c593b997d829
user:      jakllsch <jakllsch%NetBSD.org@localhost>
date:      Fri Jan 21 19:11:47 2011 +0000

description:
Add pcf8563rtc(4), yet another I2C real time clock.

diffstat:

 sys/dev/i2c/files.i2c    |    7 +-
 sys/dev/i2c/pcf8563.c    |  182 +++++++++++++++++++++++++++++++++++++++++++++++
 sys/dev/i2c/pcf8563reg.h |   53 +++++++++++++
 3 files changed, 241 insertions(+), 1 deletions(-)

diffs (264 lines):

diff -r c7484025b3f6 -r c593b997d829 sys/dev/i2c/files.i2c
--- a/sys/dev/i2c/files.i2c     Fri Jan 21 17:51:19 2011 +0000
+++ b/sys/dev/i2c/files.i2c     Fri Jan 21 19:11:47 2011 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: files.i2c,v 1.31 2011/01/04 01:24:56 matt Exp $
+#      $NetBSD: files.i2c,v 1.32 2011/01/21 19:11:47 jakllsch Exp $
 
 defflag        opt_i2cbus.h                            I2C_SCAN
 define i2cbus { }
@@ -48,6 +48,11 @@
 attach maxrtc at iic
 file   dev/i2c/max6900.c                       maxrtc
 
+# NXP/Philips PCF8563 Real Time Clock
+device pcf8563rtc
+attach pcf8563rtc at iic
+file   dev/i2c/pcf8563.c                       pcf8563rtc
+
 # Philips PCF8583 Real Time Clock
 device pcfrtc
 attach pcfrtc at iic
diff -r c7484025b3f6 -r c593b997d829 sys/dev/i2c/pcf8563.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/i2c/pcf8563.c     Fri Jan 21 19:11:47 2011 +0000
@@ -0,0 +1,182 @@
+/*     $NetBSD: pcf8563.c,v 1.1 2011/01/21 19:11:47 jakllsch Exp $     */
+
+/*
+ * Copyright (c) 2011 Jonathan A. Kollasch
+ * 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "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 COPYRIGHT HOLDER OR
+ * CONTRIBUTORS 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/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: pcf8563.c,v 1.1 2011/01/21 19:11:47 jakllsch Exp $");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <sys/kernel.h>
+
+#include <dev/clock_subr.h>
+
+#include <dev/i2c/i2cvar.h>
+#include <dev/i2c/pcf8563reg.h>
+
+struct pcf8563rtc_softc {
+       device_t sc_dev;
+       i2c_tag_t sc_tag;
+       int sc_addr;
+       struct todr_chip_handle sc_todr;
+};
+
+static int pcf8563rtc_match(device_t, cfdata_t, void *);
+static void pcf8563rtc_attach(device_t, device_t, void *);
+
+CFATTACH_DECL_NEW(pcf8563rtc, sizeof(struct pcf8563rtc_softc),
+    pcf8563rtc_match, pcf8563rtc_attach, NULL, NULL);
+
+static int pcf8563rtc_clock_read(struct pcf8563rtc_softc *, struct clock_ymdhms *);
+static int pcf8563rtc_clock_write(struct pcf8563rtc_softc *, struct clock_ymdhms *);
+static int pcf8563rtc_gettime(struct todr_chip_handle *, struct timeval *);
+static int pcf8563rtc_settime(struct todr_chip_handle *, struct timeval *);
+
+static int
+pcf8563rtc_match(device_t parent, cfdata_t cf, void *aux)
+{
+       struct i2c_attach_args *ia = aux;
+
+       if (ia->ia_addr == PCF8563_ADDR)
+               return 1;
+
+       return 0;
+}
+
+static void
+pcf8563rtc_attach(device_t parent, device_t self, void *aux)
+{
+       struct pcf8563rtc_softc *sc = device_private(self);
+       struct i2c_attach_args *ia = aux;
+
+       aprint_naive(": Real-time Clock\n");
+       aprint_normal(": NXP PCF8563 Real-time Clock\n");
+
+       sc->sc_dev = self;
+       sc->sc_tag = ia->ia_tag;
+       sc->sc_addr = ia->ia_addr;
+       sc->sc_todr.cookie = sc;
+       sc->sc_todr.todr_gettime = pcf8563rtc_gettime;
+       sc->sc_todr.todr_settime = pcf8563rtc_settime;
+       sc->sc_todr.todr_setwen = NULL;
+
+       todr_attach(&sc->sc_todr);
+}
+
+static int
+pcf8563rtc_gettime(struct todr_chip_handle *ch, struct timeval *tv)
+{
+       struct pcf8563rtc_softc *sc = ch->cookie;
+       struct clock_ymdhms dt;
+
+       memset(&dt, 0, sizeof(dt));
+
+       if (pcf8563rtc_clock_read(sc, &dt) == 0)
+               return -1;
+
+       tv->tv_sec = clock_ymdhms_to_secs(&dt);
+       tv->tv_usec = 0;
+
+       return 0;
+}
+
+static int
+pcf8563rtc_settime(struct todr_chip_handle *ch, struct timeval *tv)
+{
+        struct pcf8563rtc_softc *sc = ch->cookie;
+       struct clock_ymdhms dt;
+
+       clock_secs_to_ymdhms(tv->tv_sec, &dt);
+
+       if (pcf8563rtc_clock_write(sc, &dt) == 0)
+               return -1;
+
+       return 0;
+}
+
+static int
+pcf8563rtc_clock_read(struct pcf8563rtc_softc *sc, struct clock_ymdhms *dt)
+{
+       uint8_t bcd[PCF8563_NREGS];
+       uint8_t reg = PCF8563_R_CS1;
+
+       if (iic_acquire_bus(sc->sc_tag, I2C_F_POLL)) {
+               device_printf(sc->sc_dev, "acquire bus for read failed\n");
+               return 0;
+       }
+
+       if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, &reg, 1,
+                    &bcd[reg], PCF8563_R_YEAR - reg + 1, I2C_F_POLL)) {
+               iic_release_bus(sc->sc_tag, I2C_F_POLL);
+               device_printf(sc->sc_dev, "read failed\n");
+               return 0;
+       }
+
+       iic_release_bus(sc->sc_tag, I2C_F_POLL);
+
+       dt->dt_sec = FROMBCD(bcd[PCF8563_R_SECOND] & PCF8563_M_SECOND);
+       dt->dt_min = FROMBCD(bcd[PCF8563_R_MINUTE] & PCF8563_M_MINUTE);
+       dt->dt_hour = FROMBCD(bcd[PCF8563_R_HOUR] & PCF8563_M_HOUR);
+       dt->dt_day = FROMBCD(bcd[PCF8563_R_DAY] & PCF8563_M_DAY);
+       dt->dt_mon = FROMBCD(bcd[PCF8563_R_MONTH] & PCF8563_M_MONTH);
+       dt->dt_year = FROMBCD(bcd[PCF8563_R_YEAR] & PCF8563_M_YEAR);
+       dt->dt_year += 2000;
+
+       return 1;
+}
+
+static int
+pcf8563rtc_clock_write(struct pcf8563rtc_softc *sc, struct clock_ymdhms *dt)
+{
+       uint8_t bcd[PCF8563_NREGS];
+       uint8_t reg = PCF8563_R_SECOND;
+
+       bcd[PCF8563_R_SECOND] = TOBCD(dt->dt_sec);
+       bcd[PCF8563_R_MINUTE] = TOBCD(dt->dt_min);
+       bcd[PCF8563_R_HOUR] = TOBCD(dt->dt_hour);
+       bcd[PCF8563_R_DAY] = TOBCD(dt->dt_day);
+       bcd[PCF8563_R_WEEKDAY] = TOBCD(dt->dt_wday);
+       bcd[PCF8563_R_MONTH] = TOBCD(dt->dt_mon);
+       bcd[PCF8563_R_YEAR] = TOBCD(dt->dt_year % 100);
+
+       if (iic_acquire_bus(sc->sc_tag, I2C_F_POLL)) {
+               device_printf(sc->sc_dev, "acquire bus for write failed\n");
+               return 0;
+       }
+
+       if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, &reg, 1,
+                    &bcd[reg], PCF8563_R_YEAR - reg + 1, I2C_F_POLL)) {
+               iic_release_bus(sc->sc_tag, I2C_F_POLL);
+               device_printf(sc->sc_dev, "write failed\n");
+               return 0;
+       }
+
+       iic_release_bus(sc->sc_tag, I2C_F_POLL);
+
+       return 1;
+}
diff -r c7484025b3f6 -r c593b997d829 sys/dev/i2c/pcf8563reg.h
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/i2c/pcf8563reg.h  Fri Jan 21 19:11:47 2011 +0000
@@ -0,0 +1,53 @@
+/*     $NetBSD: pcf8563reg.h,v 1.1 2011/01/21 19:11:47 jakllsch Exp $  */
+
+/*
+ * Jonathan Kollasch, 2011
+ *
+ * This file is in the public domain.
+ */
+
+/*
+ * NXP (Philips) PCF8563 RTC registers
+ */
+
+/* We only have clock mode registers here */
+
+#ifndef _PCF8563REG_H_
+#define _PCF8563REG_H_
+
+/*
+ * PCF8563 RTC I2C address:
+ *
+ *     101 0001
+ */
+#define PCF8563_ADDR           0x51
+
+#define PCF8563_R_CS1          0x00
+#define PCF8563_R_CS2          0x01
+#define PCF8563_R_SECOND       0x02
+#define PCF8563_R_MINUTE       0x03
+#define PCF8563_R_HOUR         0x04
+#define PCF8563_R_DAY          0x05
+#define PCF8563_R_WEEKDAY      0x06
+#define PCF8563_R_MONTH                0x07
+#define PCF8563_R_YEAR         0x08
+#define PCF8563_R_MINUTE_ALARM 0x09
+#define PCF8563_R_HOUR_ALARM   0x0a
+#define PCF8563_R_DAY_ALARM    0x0b
+#define PCF8563_R_WEEKDAY_ALARM        0x0c
+#define PCF8563_R_CLKOUT_CNTRL 0x0d
+#define PCF8563_R_TIMER_CNTRL  0x0e
+#define PCF8563_R_TIMER                0x0f
+
+#define PCF8563_NREGS          0x10
+
+#define PCF8563_M_SECOND       0x7f
+#define PCF8563_M_MINUTE       0x7f
+#define PCF8563_M_HOUR         0x3f
+#define PCF8563_M_DAY          0x3f
+#define PCF8563_M_WEEKDAY      0x07
+#define PCF8563_M_MONTH                0x1f
+#define PCF8563_M_CENTURY      0x80
+#define PCF8563_M_YEAR         0xff
+
+#endif /* _PCF8563REG_H_ */



Home | Main Index | Thread Index | Old Index