1 files changed, 273 insertions, 0 deletions
diff --git a/sys/arm/nvidia/tegra124/tegra124_coretemp.c b/sys/arm/nvidia/tegra124/tegra124_coretemp.c
new file mode 100644
index 0000000..c29fe8e
--- /dev/null
+++ b/sys/arm/nvidia/tegra124/tegra124_coretemp.c
@@ -0,0 +1,273 @@
+/*-
+ * Copyright (c) 2016 Michal Meloun <mmel@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/bus.h>
+#include <sys/cpu.h>
+#include <sys/kernel.h>
+#include <sys/lock.h>
+#include <sys/malloc.h>
+#include <sys/module.h>
+#include <sys/sysctl.h>
+
+#include <machine/bus.h>
+#include <machine/cpu.h>
+
+#include <dev/extres/clk/clk.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include "tegra_soctherm_if.h"
+
+
+enum therm_info {
+	CORETEMP_TEMP,
+	CORETEMP_DELTA,
+	CORETEMP_RESOLUTION,
+	CORETEMP_TJMAX,
+};
+
+struct tegra124_coretemp_softc {
+	device_t		dev;
+	int			overheat_log;
+	int			core_max_temp;
+	int			cpu_id;
+	device_t		tsens_dev;
+	intptr_t		tsens_id;
+};
+
+static int
+coretemp_get_val_sysctl(SYSCTL_HANDLER_ARGS)
+{
+	device_t dev;
+	int val, temp, rv;
+	struct tegra124_coretemp_softc *sc;
+	enum therm_info type;
+	char stemp[16];
+
+
+	dev = (device_t) arg1;
+	sc = device_get_softc(dev);
+	type = arg2;
+
+
+	rv = TEGRA_SOCTHERM_GET_TEMPERATURE(sc->tsens_dev, sc->dev,
+	     sc->tsens_id, &temp);
+	if (rv != 0) {
+		device_printf(sc->dev,
+		    "Cannot read temperature sensor %d:  %d\n",
+		    sc->tsens_id, rv);
+		return (rv);
+	}
+
+	switch (type) {
+	case CORETEMP_TEMP:
+		val = temp / 100;
+		val +=  2731;
+		break;
+	case CORETEMP_DELTA:
+		val = (sc->core_max_temp - temp) / 1000;
+		break;
+	case CORETEMP_RESOLUTION:
+		val = 1;
+		break;
+	case CORETEMP_TJMAX:
+		val = sc->core_max_temp / 100;
+		val +=  2731;
+		break;
+	}
+
+
+	if ((temp > sc->core_max_temp)  && !sc->overheat_log) {
+		sc->overheat_log = 1;
+
+		/*
+		 * Check for Critical Temperature Status and Critical
+		 * Temperature Log.  It doesn't really matter if the
+		 * current temperature is invalid because the "Critical
+		 * Temperature Log" bit will tell us if the Critical
+		 * Temperature has * been reached in past. It's not
+		 * directly related to the current temperature.
+		 *
+		 * If we reach a critical level, allow devctl(4)
+		 * to catch this and shutdown the system.
+		 */
+		device_printf(dev, "critical temperature detected, "
+		    "suggest system shutdown\n");
+		snprintf(stemp, sizeof(stemp), "%d", val);
+		devctl_notify("coretemp", "Thermal", stemp,
+		    "notify=0xcc");
+	} else {
+		sc->overheat_log = 0;
+	}
+
+	return (sysctl_handle_int(oidp, 0, val, req));
+}
+
+static int
+tegra124_coretemp_ofw_parse(struct tegra124_coretemp_softc *sc)
+{
+	int rv, ncells;
+	phandle_t node, xnode;
+	pcell_t *cells;
+
+	node = OF_peer(0);
+	node = ofw_bus_find_child(node, "thermal-zones");
+	if (node <= 0) {
+		device_printf(sc->dev, "Cannot find 'thermal-zones'.\n");
+		return (ENXIO);
+	}
+
+	node = ofw_bus_find_child(node, "cpu");
+	if (node <= 0) {
+		device_printf(sc->dev, "Cannot find 'cpu'\n");
+		return (ENXIO);
+	}
+	rv = ofw_bus_parse_xref_list_alloc(node, "thermal-sensors",
+	    "#thermal-sensor-cells", 0, &xnode, &ncells, &cells);
+	if (rv != 0) {
+		device_printf(sc->dev,
+		    "Cannot parse 'thermal-sensors' property.\n");
+		return (ENXIO);
+	}
+	if (ncells != 1) {
+		device_printf(sc->dev,
+		    "Invalid format of 'thermal-sensors' property(%d).\n",
+		    ncells);
+		return (ENXIO);
+	}
+
+	sc->tsens_id = 0x100 + sc->cpu_id; //cells[0];
+	free(cells, M_OFWPROP);
+
+	sc->tsens_dev = OF_device_from_xref(xnode);
+	if (sc->tsens_dev == NULL) {
+		device_printf(sc->dev,
+		    "Cannot find thermal sensors device.");
+		return (ENXIO);
+	}
+	return (0);
+}
+
+static void
+tegra124_coretemp_identify(driver_t *driver, device_t parent)
+{
+
+	if (device_find_child(parent, "tegra124_coretemp", -1) != NULL)
+		return;
+	if (BUS_ADD_CHILD(parent, 0, "tegra124_coretemp", -1) == NULL)
+		device_printf(parent, "add child failed\n");
+}
+
+static int
+tegra124_coretemp_probe(device_t dev)
+{
+
+	device_set_desc(dev, "CPU Frequency Control");
+	return (0);
+}
+
+static int
+tegra124_coretemp_attach(device_t dev)
+{
+	struct tegra124_coretemp_softc *sc;
+	device_t pdev;
+	struct sysctl_oid *oid;
+	struct sysctl_ctx_list *ctx;
+	int rv;
+
+	sc = device_get_softc(dev);
+	sc->dev = dev;
+	sc->cpu_id = device_get_unit(dev);
+	sc->core_max_temp = 102000;
+	pdev = device_get_parent(dev);
+
+	rv = tegra124_coretemp_ofw_parse(sc);
+	if (rv != 0)
+		return (rv);
+
+	ctx = device_get_sysctl_ctx(dev);
+
+	oid = SYSCTL_ADD_NODE(ctx,
+	    SYSCTL_CHILDREN(device_get_sysctl_tree(pdev)), OID_AUTO,
+	    "coretemp", CTLFLAG_RD, NULL, "Per-CPU thermal information");
+
+	/*
+	 * Add the MIBs to dev.cpu.N and dev.cpu.N.coretemp.
+	 */
+	SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(device_get_sysctl_tree(pdev)),
+	    OID_AUTO, "temperature", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE,
+	    dev, CORETEMP_TEMP, coretemp_get_val_sysctl, "IK",
+	    "Current temperature");
+	SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "delta",
+	    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, dev, CORETEMP_DELTA,
+	    coretemp_get_val_sysctl, "I",
+	    "Delta between TCC activation and current temperature");
+	SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "resolution",
+	    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, dev, CORETEMP_RESOLUTION,
+	    coretemp_get_val_sysctl, "I",
+	    "Resolution of CPU thermal sensor");
+	SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "tjmax",
+	    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, dev, CORETEMP_TJMAX,
+	    coretemp_get_val_sysctl, "IK",
+	    "TCC activation temperature");
+
+	return (0);
+}
+
+static int
+tegra124_coretemp_detach(device_t dev)
+{
+	struct tegra124_coretemp_softc *sc;
+
+	sc = device_get_softc(dev);
+	return (0);
+}
+
+
+static device_method_t tegra124_coretemp_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_identify,	tegra124_coretemp_identify),
+	DEVMETHOD(device_probe,		tegra124_coretemp_probe),
+	DEVMETHOD(device_attach,	tegra124_coretemp_attach),
+	DEVMETHOD(device_detach,	tegra124_coretemp_detach),
+
+
+	DEVMETHOD_END
+};
+
+static devclass_t tegra124_coretemp_devclass;
+static driver_t tegra124_coretemp_driver = {
+	"tegra124_coretemp",
+	tegra124_coretemp_methods,
+	sizeof(struct tegra124_coretemp_softc),
+};
+
+DRIVER_MODULE(tegra124_coretemp, cpu, tegra124_coretemp_driver,
+    tegra124_coretemp_devclass, 0, 0);