Author: ganbold (doc committer)
Date: Mon Nov 25 11:01:19 2013
New Revision: 258546
URL: http://svnweb.freebsd.org/changeset/base/258546
Log:
Add watchdog driver for rk3188.
Approved by: ray@
Added:
head/sys/arm/rockchip/rk30xx_wdog.c (contents, props changed)
head/sys/arm/rockchip/rk30xx_wdog.h (contents, props changed)
Modified:
head/sys/arm/rockchip/files.rk30xx
Modified: head/sys/arm/rockchip/files.rk30xx
==============================================================================
--- head/sys/arm/rockchip/files.rk30xx Mon Nov 25 10:58:02 2013
(r258545)
+++ head/sys/arm/rockchip/files.rk30xx Mon Nov 25 11:01:19 2013
(r258546)
@@ -17,5 +17,6 @@ arm/rockchip/common.c standard
arm/rockchip/rk30xx_machdep.c standard
arm/rockchip/rk30xx_pmu.c standard
arm/rockchip/rk30xx_grf.c standard
+arm/rockchip/rk30xx_wdog.c standard
arm/rockchip/rk30xx_gpio.c optional gpio
dev/usb/controller/dwc_otg_fdt.c optional dwcotg
Added: head/sys/arm/rockchip/rk30xx_wdog.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/arm/rockchip/rk30xx_wdog.c Mon Nov 25 11:01:19 2013
(r258546)
@@ -0,0 +1,198 @@
+/*-
+ * Copyright (c) 2013 Ganbold Tsagaankhuu <ganb...@gmail.com>
+ * 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/rockchip/rk30xx_wdog.h>
+
+#ifndef RK30_WDT_BASE
+#define RK30_WDT_BASE 0x2004c000
+#define RK30_WDT_PSIZE 0x100
+#endif
+
+#define RK30_WDT_READ(_sc, _r) bus_read_4((_sc)->res, (_r))
+#define RK30_WDT_WRITE(_sc, _r, _v) bus_write_4((_sc)->res, (_r),
(_v))
+
+#define WDOG_CTRL 0x00
+#define WDOG_CTRL_EN (1 << 0)
+#define WDOG_CTRL_RSP_MODE (1 << 1)
+#define WDOG_CTRL_RST_PULSE (4 << 2)
+#define WDOG_CTRL_RST 0xa
+#define WDOG_TORR 0x04
+#define WDOG_TORR_INTVL_SHIFT 0
+#define WDOG_CCVR 0x08
+#define WDOG_CRR 0x0c
+#define WDOG_CRR_PWD 0x76
+#define WDOG_STAT 0x10
+#define WDOG_EOI 0x14
+
+static struct rk30_wd_softc *rk30_wd_sc = NULL;
+
+struct rk30_wd_softc {
+ device_t dev;
+ struct resource *res;
+ struct mtx mtx;
+ int freq;
+};
+
+static void rk30_wd_watchdog_fn(void *private, u_int cmd, int *error);
+
+static int
+rk30_wd_probe(device_t dev)
+{
+
+ if (ofw_bus_is_compatible(dev, "rockchip,rk30xx-wdt")) {
+ device_set_desc(dev, "Rockchip RK30XX Watchdog");
+ return (BUS_PROBE_DEFAULT);
+ }
+
+ return (ENXIO);
+}
+
+static int
+rk30_wd_attach(device_t dev)
+{
+ struct rk30_wd_softc *sc;
+ int rid;
+ phandle_t node;
+ pcell_t cell;
+
+ if (rk30_wd_sc != NULL)
+ return (ENXIO);
+
+ sc = device_get_softc(dev);
+ sc->dev = dev;
+
+ node = ofw_bus_get_node(sc->dev);
+ if (OF_getencprop(node, "clock-frequency", &cell, sizeof(cell)) > 0)
+ sc->freq = cell / 1000000;
+ else
+ return (ENXIO);
+
+ 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);
+ }
+
+ rk30_wd_sc = sc;
+ mtx_init(&sc->mtx, "RK30XX Watchdog", "rk30_wd", MTX_DEF);
+ EVENTHANDLER_REGISTER(watchdog_list, rk30_wd_watchdog_fn, sc, 0);
+
+ return (0);
+}
+
+static void
+rk30_wd_watchdog_fn(void *private, u_int cmd, int *error)
+{
+ struct rk30_wd_softc *sc;
+ uint64_t ms, m, max;
+ int i;
+
+ sc = private;
+ mtx_lock(&sc->mtx);
+
+ cmd &= WD_INTERVAL;
+
+ if (cmd > 0) {
+ ms = ((uint64_t)1 << (cmd & WD_INTERVAL)) / 1000000;
+ m = 0xffff / sc->freq;
+ max = 0x7fffffff / sc->freq + 1;
+ i = 0;
+ while (m < max && m < ms) {
+ m <<= 1;
+ i++;
+ }
+ if (m < max) {
+ RK30_WDT_WRITE(sc, WDOG_TORR,
+ i << WDOG_TORR_INTVL_SHIFT);
+ RK30_WDT_WRITE(sc, WDOG_CTRL,
+ WDOG_CTRL_EN | WDOG_CTRL_RSP_MODE |
+ WDOG_CTRL_RST_PULSE);
+ RK30_WDT_WRITE(sc, WDOG_CRR, WDOG_CRR_PWD);
+ *error = 0;
+ } else {
+ device_printf(sc->dev, "Can not be disabled\n");
+ mtx_unlock(&sc->mtx);
+ RK30_WDT_WRITE(sc, WDOG_CTRL, WDOG_CTRL_RST);
+ return;
+ }
+ }
+ else
+ RK30_WDT_WRITE(sc, WDOG_CTRL, WDOG_CTRL_RST);
+
+ mtx_unlock(&sc->mtx);
+}
+
+void
+rk30_wd_watchdog_reset()
+{
+ bus_space_handle_t bsh;
+
+ bus_space_map(fdtbus_bs_tag, RK30_WDT_BASE, RK30_WDT_PSIZE, 0, &bsh);
+ bus_space_write_4(fdtbus_bs_tag, bsh, WDOG_TORR, 0);
+ bus_space_write_4(fdtbus_bs_tag, bsh, WDOG_CTRL,
+ WDOG_CTRL_EN | WDOG_CTRL_RSP_MODE | WDOG_CTRL_RST_PULSE);
+
+ while (1);
+}
+
+static device_method_t rk30_wd_methods[] = {
+ DEVMETHOD(device_probe, rk30_wd_probe),
+ DEVMETHOD(device_attach, rk30_wd_attach),
+
+ DEVMETHOD_END
+};
+
+static driver_t rk30_wd_driver = {
+ "rk30_wd",
+ rk30_wd_methods,
+ sizeof(struct rk30_wd_softc),
+};
+static devclass_t rk30_wd_devclass;
+
+DRIVER_MODULE(rk30_wd, simplebus, rk30_wd_driver, rk30_wd_devclass, 0, 0);
Added: head/sys/arm/rockchip/rk30xx_wdog.h
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/arm/rockchip/rk30xx_wdog.h Mon Nov 25 11:01:19 2013
(r258546)
@@ -0,0 +1,35 @@
+/*-
+ * Copyright (c) 2013 Ganbold Tsagaankhuu <ganb...@gmail.com>
+ * 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 __RK30XX_WDOG_H__
+#define __RK30XX_WDOG_H__
+
+void rk30_wd_watchdog_reset(void);
+
+#endif /*__RK30XX_WDOG_H__*/
+
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