Introduce basic support for Marvell families of system-on-chip ARM devices:

  *  Orion
     - 88F5181
     - 88F5182
     - 88F5281

  * Kirkwood
     - 88F6281

  * Discovery
     - MV78100

The above families of SOCs are built around CPU cores compliant with ARMv5TE
instruction set architecture definition. They share a number of integrated
peripherals. This commit brings support for the following basic elements:

  * GPIO
  * Interrupt controller
  * L1, L2 cache
  * Timers, watchdog, RTC
  * TWSI (I2C)
  * UART

Other peripherals drivers will be introduced separately.

Reviewed by:	imp, marcel, stass (Thanks guys!)
Obtained from:	Marvell, Semihalf

1 files changed, 184 insertions, 0 deletions

diff --git a/sys/arm/mv/rtc.c b/sys/arm/mv/rtc.c
new file mode 100644
index 000000000000..80b8343c7e02
--- /dev/null
+++ b/sys/arm/mv/rtc.c
@@ -0,0 +1,184 @@
+/*-
+ * Copyright (C) 2008 MARVELL INTERNATIONAL LTD.
+ * All rights reserved.
+ *
+ * Developed by Semihalf.
+ *
+ * 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. Neither the name of MARVELL nor the names of contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY AUTHOR 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 AUTHOR 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>
+__FBSDID("$FreeBSD$");
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/lock.h>
+#include <sys/time.h>
+#include <sys/clock.h>
+#include <sys/resource.h>
+#include <sys/systm.h>
+#include <sys/rman.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+
+#include <machine/bus.h>
+#include <machine/resource.h>
+
+#include "clock_if.h"
+
+#define MV_RTC_TIME_REG		0x00
+#define MV_RTC_DATE_REG		0x04
+#define YEAR_BASE		2000
+
+struct mv_rtc_softc {
+	device_t dev;
+	struct resource *res[1];
+};
+
+static struct resource_spec res_spec[] = {
+	{ SYS_RES_MEMORY, 0, RF_ACTIVE },
+	{ -1, 0 }
+};
+
+static int mv_rtc_probe(device_t dev);
+static int mv_rtc_attach(device_t dev);
+
+static int mv_rtc_gettime(device_t dev, struct timespec *ts);
+static int mv_rtc_settime(device_t dev, struct timespec *ts);
+
+static uint32_t mv_rtc_reg_read(struct mv_rtc_softc *sc, bus_size_t off);
+static int mv_rtc_reg_write(struct mv_rtc_softc *sc, bus_size_t off,
+    uint32_t val);
+
+static device_method_t mv_rtc_methods[] = {
+	DEVMETHOD(device_probe,		mv_rtc_probe),
+	DEVMETHOD(device_attach,	mv_rtc_attach),
+
+	DEVMETHOD(clock_gettime,	mv_rtc_gettime),
+	DEVMETHOD(clock_settime,	mv_rtc_settime),
+
+	{ 0, 0 },
+};
+
+static driver_t mv_rtc_driver = {
+	"rtc",
+	mv_rtc_methods,
+	sizeof(struct mv_rtc_softc),
+};
+static devclass_t mv_rtc_devclass;
+
+DRIVER_MODULE(mv_rtc, mbus, mv_rtc_driver, mv_rtc_devclass, 0, 0);
+
+static int
+mv_rtc_probe(device_t dev)
+{
+
+	device_set_desc(dev, "Marvell Integrated RTC");
+	return (0);
+}
+
+static int
+mv_rtc_attach(device_t dev)
+{
+	struct mv_rtc_softc *sc;
+
+	sc = device_get_softc(dev);
+	sc->dev = dev;
+
+	clock_register(dev, 1000000);
+
+	if (bus_alloc_resources(dev, res_spec, sc->res)) {
+		device_printf(dev, "could not allocate resources\n");
+		return (ENXIO);
+	}
+
+	return (0);
+}
+
+static int
+mv_rtc_gettime(device_t dev, struct timespec *ts)
+{
+	struct clocktime ct;
+	struct mv_rtc_softc *sc;
+	uint32_t val;
+
+	sc = device_get_softc(dev);
+
+	val = mv_rtc_reg_read(sc, MV_RTC_TIME_REG);
+
+	ct.nsec = 0;
+	ct.sec = FROMBCD(val & 0x7f);
+	ct.min = FROMBCD((val & 0x7f00) >> 8);
+	ct.hour = FROMBCD((val & 0x3f0000) >> 16);
+	ct.dow = FROMBCD((val & 0x7000000) >> 24) - 1;
+
+	val = mv_rtc_reg_read(sc, MV_RTC_DATE_REG);
+
+	ct.day = FROMBCD(val & 0x7f);
+	ct.mon = FROMBCD((val & 0x1f00) >> 8);
+	ct.year = YEAR_BASE + FROMBCD((val & 0xff0000) >> 16);
+
+	return (clock_ct_to_ts(&ct, ts));
+}
+
+static int
+mv_rtc_settime(device_t dev, struct timespec *ts)
+{
+	struct clocktime ct;
+	struct mv_rtc_softc *sc;
+	uint32_t val;
+
+	sc = device_get_softc(dev);
+
+	/* Resolution: 1 sec */
+	if (ts->tv_nsec >= 500000000)
+		ts->tv_sec++;
+	ts->tv_nsec = 0;
+	clock_ts_to_ct(ts, &ct);
+
+	val = TOBCD(ct.sec) | (TOBCD(ct.min) << 8) |
+	    (TOBCD(ct.hour) << 16) | (TOBCD( ct.dow + 1) << 24);
+	mv_rtc_reg_write(sc, MV_RTC_TIME_REG, val);
+
+	val = TOBCD(ct.day) | (TOBCD(ct.mon) << 8) |
+	    (TOBCD(ct.year - YEAR_BASE) << 16);
+	mv_rtc_reg_write(sc, MV_RTC_DATE_REG, val);
+
+	return (0);
+}
+
+static uint32_t
+mv_rtc_reg_read(struct mv_rtc_softc *sc, bus_size_t off)
+{
+
+	return (bus_read_4(sc->res[0], off));
+}
+
+static int
+mv_rtc_reg_write(struct mv_rtc_softc *sc, bus_size_t off, uint32_t val)
+{
+
+	bus_write_4(sc->res[0], off, val);
+	return (0);
+}