Author: gonzo
Date: Mon Feb 11 11:31:23 2013
New Revision: 246660
URL: http://svnweb.freebsd.org/changeset/base/246660
Log:
Add watchdog driver for Allwinner A10
Added:
head/sys/arm/allwinner/a10_wdog.c (contents, props changed)
head/sys/arm/allwinner/a10_wdog.h (contents, props changed)
Modified:
head/sys/arm/allwinner/files.a10
head/sys/boot/fdt/dts/cubieboard.dts
Added: head/sys/arm/allwinner/a10_wdog.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/arm/allwinner/a10_wdog.c Mon Feb 11 11:31:23 2013
(r246660)
@@ -0,0 +1,194 @@
+/*-
+ * Copyright (c) 2013 Oleksandr Tymoshenko <go...@freebsd.org>
+ * 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 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 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/systm.h>
+#include <sys/watchdog.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/lock.h>
+#include <sys/module.h>
+#include <sys/mutex.h>
+#include <sys/rman.h>
+
+#include <dev/fdt/fdt_common.h>
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include <machine/bus.h>
+#include <machine/cpufunc.h>
+#include <machine/machdep.h>
+#include <machine/fdt.h>
+
+#include <arm/allwinner/a10_wdog.h>
+
+#define READ(_sc, _r) bus_read_4((_sc)->res, (_r))
+#define WRITE(_sc, _r, _v) bus_write_4((_sc)->res, (_r), (_v))
+
+#define WDOG_CTRL 0x00
+#define WDOG_CTRL_RESTART (1 << 0)
+#define WDOG_MODE 0x04
+#define WDOG_MODE_INTVL_SHIFT 3
+#define WDOG_MODE_RST_EN (1 << 1)
+#define WDOG_MODE_EN (1 << 0)
+
+struct a10wd_interval {
+ uint64_t milliseconds;
+ unsigned int value;
+};
+
+struct a10wd_interval wd_intervals[] = {
+ { 500, 0 },
+ { 1000, 1 },
+ { 2000, 2 },
+ { 3000, 3 },
+ { 4000, 4 },
+ { 5000, 5 },
+ { 6000, 6 },
+ { 8000, 7 },
+ { 10000, 8 },
+ { 12000, 9 },
+ { 14000, 10 },
+ { 16000, 11 },
+ { 0, 0 } /* sentinel */
+};
+
+static struct a10wd_softc *a10wd_sc = NULL;
+
+struct a10wd_softc {
+ device_t dev;
+ struct resource * res;
+ struct mtx mtx;
+};
+
+static void a10wd_watchdog_fn(void *private, u_int cmd, int *error);
+
+static int
+a10wd_probe(device_t dev)
+{
+
+ printf("A10 watchdog probe\n");
+ if (ofw_bus_is_compatible(dev, "allwinner,sun4i-wdt")) {
+ device_set_desc(dev, "Allwinner A10 Watchdog");
+ return (BUS_PROBE_DEFAULT);
+ }
+
+ return (ENXIO);
+}
+
+static int
+a10wd_attach(device_t dev)
+{
+ struct a10wd_softc *sc;
+ int rid;
+
+ if (a10wd_sc != NULL)
+ return (ENXIO);
+
+ sc = device_get_softc(dev);
+ sc->dev = dev;
+
+ rid = 0;
+ sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
+ if (sc->res == NULL) {
+ device_printf(dev, "could not allocate memory resource\n");
+ return (ENXIO);
+ }
+
+ a10wd_sc = sc;
+ mtx_init(&sc->mtx, "A10 Watchdog", "a10wd", MTX_DEF);
+ EVENTHANDLER_REGISTER(watchdog_list, a10wd_watchdog_fn, sc, 0);
+
+ return (0);
+}
+
+static void
+a10wd_watchdog_fn(void *private, u_int cmd, int *error)
+{
+ struct a10wd_softc *sc;
+ uint64_t ms;
+ int i;
+
+ sc = private;
+ mtx_lock(&sc->mtx);
+
+ cmd &= WD_INTERVAL;
+
+ if (cmd > 0) {
+ ms = ((uint64_t)1 << (cmd & WD_INTERVAL)) / 1000000;
+ i = 0;
+ while (wd_intervals[i].milliseconds &&
+ (ms > wd_intervals[i].milliseconds))
+ i++;
+ if (wd_intervals[i].milliseconds) {
+ WRITE(sc, WDOG_MODE,
+ (wd_intervals[i].value << WDOG_MODE_INTVL_SHIFT) |
+ WDOG_MODE_EN | WDOG_MODE_RST_EN);
+ WRITE(sc, WDOG_CTRL, WDOG_CTRL_RESTART);
+ }
+ }
+ else
+ WRITE(sc, WDOG_MODE, 0);
+
+ mtx_unlock(&sc->mtx);
+}
+
+void
+a10wd_watchdog_reset()
+{
+
+ if (a10wd_sc == NULL) {
+ printf("Reset: watchdog device has not been initialized\n");
+ return;
+ }
+
+ WRITE(a10wd_sc, WDOG_MODE,
+ (wd_intervals[0].value << WDOG_MODE_INTVL_SHIFT) |
+ WDOG_MODE_EN | WDOG_MODE_RST_EN);
+
+ while(1)
+ ;
+
+}
+
+static device_method_t a10wd_methods[] = {
+ DEVMETHOD(device_probe, a10wd_probe),
+ DEVMETHOD(device_attach, a10wd_attach),
+
+ DEVMETHOD_END
+};
+
+static driver_t a10wd_driver = {
+ "a10wd",
+ a10wd_methods,
+ sizeof(struct a10wd_softc),
+};
+static devclass_t a10wd_devclass;
+
+DRIVER_MODULE(a10wd, simplebus, a10wd_driver, a10wd_devclass, 0, 0);
Added: head/sys/arm/allwinner/a10_wdog.h
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/arm/allwinner/a10_wdog.h Mon Feb 11 11:31:23 2013
(r246660)
@@ -0,0 +1,35 @@
+/*-
+ * Copyright (c) 2013 Oleksandr Tymoshenko <go...@freebsd.org>
+ * 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 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 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.
+ *
+ * $FreeBSD$
+ *
+ */
+#ifndef __A10_WDOG_H__
+#define __A10_WDOG_H__
+
+void a10wd_watchdog_reset(void);
+
+#endif /*__A10_WDOG_H__*/
+
Modified: head/sys/arm/allwinner/files.a10
==============================================================================
--- head/sys/arm/allwinner/files.a10 Mon Feb 11 10:58:22 2013
(r246659)
+++ head/sys/arm/allwinner/files.a10 Mon Feb 11 11:31:23 2013
(r246660)
@@ -12,6 +12,7 @@ arm/arm/irq_dispatch.S standard
arm/allwinner/a10_clk.c standard
arm/allwinner/a10_gpio.c optional gpio
arm/allwinner/a10_ehci.c optional ehci
+arm/allwinner/a10_wdog.c standard
arm/allwinner/timer.c standard
arm/allwinner/aintc.c standard
arm/allwinner/bus_space.c standard
Modified: head/sys/boot/fdt/dts/cubieboard.dts
==============================================================================
--- head/sys/boot/fdt/dts/cubieboard.dts Mon Feb 11 10:58:22 2013
(r246659)
+++ head/sys/boot/fdt/dts/cubieboard.dts Mon Feb 11 11:31:23 2013
(r246660)
@@ -76,6 +76,12 @@
clock-frequency = < 24000000 >;
};
+ watchdog@01c20c90 {
+ compatible = "allwinner,sun4i-wdt";
+ reg = <0x01c20c90 0x08>;
+ };
+
+
GPIO: gpio@01c20800 {
#gpio-cells = <3>;
compatible = "allwinner,sun4i-gpio";
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