[src/trunk]: src/sys Add driver for ARM PrimeCell PL031 (RTC) Real Time Clock.

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/d88f849672bb
branches:  trunk
changeset: 824557:d88f849672bb
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Thu Jun 08 21:00:43 2017 +0000

description:
Add driver for ARM PrimeCell PL031 (RTC) Real Time Clock.

diffstat:

 sys/conf/files        |   6 +++-
 sys/dev/ic/pl031.c    |  84 +++++++++++++++++++++++++++++++++++++++++++++++++++
 sys/dev/ic/pl031var.h |  42 +++++++++++++++++++++++++
 3 files changed, 131 insertions(+), 1 deletions(-)

diffs (154 lines):

diff -r 360cf351c9f5 -r d88f849672bb sys/conf/files
--- a/sys/conf/files    Thu Jun 08 20:12:57 2017 +0000
+++ b/sys/conf/files    Thu Jun 08 21:00:43 2017 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: files,v 1.1174 2017/06/08 10:02:39 jmcneill Exp $
+#      $NetBSD: files,v 1.1175 2017/06/08 21:00:43 jmcneill Exp $
 #      @(#)files.newconf       7.5 (Berkeley) 5/10/93
 
 version        20150846
@@ -1315,6 +1315,10 @@
 device dwcmmc: sdmmcbus
 file   dev/ic/dwc_mmc.c                dwcmmc
 
+# ARM PrimeCell PL031 (RTC) real time clock
+device plrtc
+file   dev/ic/pl031.c                  plrtc
+
 # ARM PrimeCell PL041 (AACI) Advanced Audio CODEC interface
 device aaci: audiobus, auconv, aurateconv, mulaw, ac97
 file   dev/ic/pl041.c                  aaci
diff -r 360cf351c9f5 -r d88f849672bb sys/dev/ic/pl031.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/ic/pl031.c        Thu Jun 08 21:00:43 2017 +0000
@@ -0,0 +1,84 @@
+/* $NetBSD: pl031.c,v 1.1 2017/06/08 21:00:43 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2017 Jared McNeill <jmcneill%invisible.ca@localhost>
+ * 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 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.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: pl031.c,v 1.1 2017/06/08 21:00:43 jmcneill Exp $");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <sys/kmem.h>
+#include <sys/bus.h>
+
+#include <dev/clock_subr.h>
+
+#include <dev/ic/pl031var.h>
+
+#define        RTCDR   0x000
+#define        RTCLR   0x008
+#define        RTCCR   0x00c
+#define         RTCCR_START    __BIT(0)
+
+#define        RTC_READ(sc, reg)                       \
+       bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, (reg))
+#define        RTC_WRITE(sc, reg, val)         \
+       bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, (reg), (val))
+
+static int
+plrtc_gettime(todr_chip_handle_t tch, struct timeval *tv)
+{
+       struct plrtc_softc * const sc = tch->cookie;
+
+       tv->tv_sec = RTC_READ(sc, RTCDR);
+       tv->tv_usec = 0;
+
+       return 0;
+}
+
+static int
+plrtc_settime(todr_chip_handle_t tch, struct timeval *tv)
+{
+       struct plrtc_softc * const sc = tch->cookie;
+
+       RTC_WRITE(sc, RTCLR, tv->tv_sec);
+
+       return 0;
+}
+
+void
+plrtc_attach(struct plrtc_softc *sc)
+{
+       aprint_naive("\n");
+       aprint_normal(": RTC\n");
+
+       sc->sc_todr.todr_gettime = plrtc_gettime;
+       sc->sc_todr.todr_settime = plrtc_settime;
+       sc->sc_todr.cookie = sc;
+
+       RTC_WRITE(sc, RTCCR, RTCCR_START);
+}
diff -r 360cf351c9f5 -r d88f849672bb sys/dev/ic/pl031var.h
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/ic/pl031var.h     Thu Jun 08 21:00:43 2017 +0000
@@ -0,0 +1,42 @@
+/* $NetBSD: pl031var.h,v 1.1 2017/06/08 21:00:43 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2017 Jared McNeill <jmcneill%invisible.ca@localhost>
+ * 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 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.
+ */
+
+#ifndef _PL041VAR_H
+#define _PL041VAR_H
+
+struct plrtc_softc {
+       device_t                sc_dev;
+       bus_space_tag_t         sc_bst;
+       bus_space_handle_t      sc_bsh;
+
+       struct todr_chip_handle sc_todr;
+};
+
+void   plrtc_attach(struct plrtc_softc *);
+
+#endif /* !_PL041VAR_H */