Author: wma
Date: Wed Jan 25 06:08:10 2017
New Revision: 312739
URL: https://svnweb.freebsd.org/changeset/base/312739
Log:
Introduce armada_thermal driver for Armada family platforms
* Currently supports only Armada38X family but other Marvell SoC's
can be added if needed.
* Provides temperature is C deg.
* To print the temperature one can use:
sysctl dev.armada_thermal.0.temperature
Submitted by: Zbigniew Bodek <z...@semihalf.com>
Obtained from: Semihalf
Sponsored by: Stormshield
Differential revision: https://reviews.freebsd.org/D9217
Added:
head/sys/arm/mv/armada/
head/sys/arm/mv/armada/thermal.c (contents, props changed)
Modified:
head/sys/arm/mv/armada38x/files.armada38x
Added: head/sys/arm/mv/armada/thermal.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/arm/mv/armada/thermal.c Wed Jan 25 06:08:10 2017
(r312739)
@@ -0,0 +1,314 @@
+/*-
+ * Copyright (c) 2017 Semihalf.
+ * Copyright (c) 2017 Stormshield.
+ * 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/sysctl.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/conf.h>
+#include <sys/rman.h>
+#include <sys/types.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/resource.h>
+
+#include <machine/fdt.h>
+
+#include <dev/ofw/ofw_bus_subr.h>
+
+#define READOUT_TO_C(temp) ((temp) / 1000)
+
+#define STAT_RID 0
+#define CTRL_RID 1
+
+#define TSEN_STAT_READOUT_VALID 0x1
+
+#define A380_TSEN_CTRL_RESET (1 << 8)
+
+struct armada_thermal_softc;
+
+typedef struct armada_thermal_data {
+ /* Initialize the sensor */
+ void (*tsen_init)(struct armada_thermal_softc *);
+
+ /* Test for a valid sensor value */
+ boolean_t (*is_valid)(struct armada_thermal_softc *);
+
+ /* Formula coefficients: temp = (b + m * reg) / div */
+ u_long coef_b;
+ u_long coef_m;
+ u_long coef_div;
+
+ boolean_t inverted;
+
+ /* Shift and mask to access the sensor temperature */
+ u_int temp_shift;
+ u_int temp_mask;
+ u_int is_valid_shift;
+} armada_tdata_t;
+
+static boolean_t armada_tsen_readout_valid(struct armada_thermal_softc *);
+static int armada_tsen_get_temp(struct armada_thermal_softc *, u_long *);
+static void armada380_tsen_init(struct armada_thermal_softc *);
+static void armada_temp_update(void *);
+
+static const armada_tdata_t armada380_tdata = {
+ .tsen_init = armada380_tsen_init,
+ .is_valid = armada_tsen_readout_valid,
+ .is_valid_shift = 10,
+ .temp_shift = 0,
+ .temp_mask = 0x3ff,
+ .coef_b = 1172499100UL,
+ .coef_m = 2000096UL,
+ .coef_div = 4201,
+ .inverted = TRUE,
+};
+
+static int armada_thermal_probe(device_t);
+static int armada_thermal_attach(device_t);
+static int armada_thermal_detach(device_t);
+
+static device_method_t armada_thermal_methods[] = {
+ DEVMETHOD(device_probe, armada_thermal_probe),
+ DEVMETHOD(device_attach, armada_thermal_attach),
+ DEVMETHOD(device_detach, armada_thermal_detach),
+
+ DEVMETHOD_END
+};
+
+struct armada_thermal_softc {
+ device_t dev;
+
+ struct resource *stat_res;
+ struct resource *ctrl_res;
+
+ struct callout temp_upd;
+ struct mtx temp_upd_mtx;
+
+ const armada_tdata_t *tdata;
+
+ u_long chip_temperature;
+};
+
+static driver_t armada_thermal_driver = {
+ "armada_thermal",
+ armada_thermal_methods,
+ sizeof(struct armada_thermal_softc)
+};
+
+static devclass_t armada_thermal_devclass;
+
+DRIVER_MODULE(armada_thermal, simplebus, armada_thermal_driver,
+ armada_thermal_devclass, 0, 0);
+DRIVER_MODULE(armada_thermal, ofwbus, armada_thermal_driver,
+ armada_thermal_devclass, 0, 0);
+
+static int
+armada_thermal_probe(device_t dev)
+{
+ struct armada_thermal_softc *sc;
+
+ sc = device_get_softc(dev);
+
+ if (!ofw_bus_status_okay(dev))
+ return (ENXIO);
+
+ if (ofw_bus_is_compatible(dev, "marvell,armada380-thermal")) {
+ device_set_desc(dev, "Armada380 Thermal Control");
+ sc->tdata = &armada380_tdata;
+
+ return (BUS_PROBE_DEFAULT);
+ }
+
+ return (ENXIO);
+}
+
+static int
+armada_thermal_attach(device_t dev)
+{
+ struct armada_thermal_softc *sc;
+ const armada_tdata_t *tdata;
+ struct sysctl_ctx_list *sctx;
+ struct sysctl_oid_list *schildren;
+ int timeout;
+ int rid;
+
+ sc = device_get_softc(dev);
+
+ /* Allocate CTRL and STAT register spaces */
+ rid = STAT_RID;
+ sc->stat_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
+ &rid, RF_ACTIVE);
+ if (sc->stat_res == NULL) {
+ device_printf(dev,
+ "Could not allocate memory for the status register\n");
+ return (ENXIO);
+ }
+
+ rid = CTRL_RID;
+ sc->ctrl_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
+ &rid, RF_ACTIVE);
+ if (sc->ctrl_res == NULL) {
+ device_printf(dev,
+ "Could not allocate memory for the control register\n");
+ bus_release_resource(dev, SYS_RES_MEMORY,
+ rman_get_rid(sc->stat_res), sc->stat_res);
+ sc->stat_res = NULL;
+ return (ENXIO);
+ }
+
+ /* Now initialize the sensor */
+ tdata = sc->tdata;
+ tdata->tsen_init(sc);
+ /* Set initial temperature value */
+ for (timeout = 1000; timeout > 0; timeout--) {
+ if (armada_tsen_get_temp(sc, &sc->chip_temperature) == 0)
+ break;
+ DELAY(10);
+ }
+ if (timeout <= 0) {
+ bus_release_resource(dev, SYS_RES_MEMORY,
+ rman_get_rid(sc->stat_res), sc->stat_res);
+ sc->stat_res = NULL;
+ bus_release_resource(dev, SYS_RES_MEMORY,
+ rman_get_rid(sc->ctrl_res), sc->ctrl_res);
+ sc->ctrl_res = NULL;
+ return (ENXIO);
+ }
+ /* Initialize mutex */
+ mtx_init(&sc->temp_upd_mtx, "Armada Thermal", NULL, MTX_DEF);
+ /* Set up the temperature update callout */
+ callout_init_mtx(&sc->temp_upd, &sc->temp_upd_mtx, 0);
+ /* Schedule callout */
+ callout_reset(&sc->temp_upd, hz, armada_temp_update, sc);
+
+ sctx = device_get_sysctl_ctx(dev);
+ schildren = SYSCTL_CHILDREN(device_get_sysctl_tree(dev));
+ SYSCTL_ADD_LONG(sctx, schildren, OID_AUTO, "temperature",
+ CTLFLAG_RD, &sc->chip_temperature, "SoC temperature");
+
+ return (0);
+}
+
+static int
+armada_thermal_detach(device_t dev)
+{
+ struct armada_thermal_softc *sc;
+
+ sc = device_get_softc(dev);
+
+ if (!device_is_attached(dev))
+ return (0);
+
+ callout_drain(&sc->temp_upd);
+
+ sc->chip_temperature = 0;
+
+ bus_release_resource(dev, SYS_RES_MEMORY,
+ rman_get_rid(sc->stat_res), sc->stat_res);
+ sc->stat_res = NULL;
+
+ bus_release_resource(dev, SYS_RES_MEMORY,
+ rman_get_rid(sc->ctrl_res), sc->ctrl_res);
+ sc->ctrl_res = NULL;
+
+ return (0);
+}
+
+static boolean_t
+armada_tsen_readout_valid(struct armada_thermal_softc *sc)
+{
+ const armada_tdata_t *tdata;
+ uint32_t tsen_stat;
+ boolean_t is_valid;
+
+ tdata = sc->tdata;
+ tsen_stat = bus_read_4(sc->stat_res, 0);
+
+ tsen_stat >>= tdata->is_valid_shift;
+ is_valid = ((tsen_stat & TSEN_STAT_READOUT_VALID) != 0);
+
+ return (is_valid);
+}
+
+static int
+armada_tsen_get_temp(struct armada_thermal_softc *sc, u_long *temp)
+{
+ const armada_tdata_t *tdata;
+ uint32_t reg;
+ u_long tmp;
+ u_long m, b, div;
+
+ tdata = sc->tdata;
+ /* Check if the readout is valid */
+ if ((tdata->is_valid != NULL) && !tdata->is_valid(sc))
+ return (EIO);
+
+ reg = bus_read_4(sc->stat_res, 0);
+ reg = (reg >> tdata->temp_shift) & tdata->temp_mask;
+
+ /* Get formula coefficients */
+ b = tdata->coef_b;
+ m = tdata->coef_m;
+ div = tdata->coef_div;
+
+ if (tdata->inverted)
+ tmp = ((m * reg) - b) / div;
+ else
+ tmp = (b - (m * reg)) / div;
+
+ *temp = READOUT_TO_C(tmp);
+
+ return (0);
+}
+
+static void
+armada380_tsen_init(struct armada_thermal_softc *sc)
+{
+ uint32_t tsen_ctrl;
+
+ tsen_ctrl = bus_read_4(sc->ctrl_res, 0);
+ if ((tsen_ctrl & A380_TSEN_CTRL_RESET) == 0) {
+ tsen_ctrl |= A380_TSEN_CTRL_RESET;
+ bus_write_4(sc->ctrl_res, 0, tsen_ctrl);
+ DELAY(10000);
+ }
+}
+
+static void
+armada_temp_update(void *arg)
+{
+ struct armada_thermal_softc *sc;
+
+ sc = arg;
+ /* Update temperature value, keel old if the readout is not valid */
+ (void)armada_tsen_get_temp(sc, &sc->chip_temperature);
+
+ callout_reset(&sc->temp_upd, hz, armada_temp_update, sc);
+}
Modified: head/sys/arm/mv/armada38x/files.armada38x
==============================================================================
--- head/sys/arm/mv/armada38x/files.armada38x Wed Jan 25 04:35:57 2017
(r312738)
+++ head/sys/arm/mv/armada38x/files.armada38x Wed Jan 25 06:08:10 2017
(r312739)
@@ -1,6 +1,8 @@
# $FreeBSD$
arm/mv/mpic.c standard
+arm/mv/armada/thermal.c optional fdt
+
arm/mv/armada38x/armada38x.c standard
arm/mv/armada38x/armada38x_mp.c optional smp
arm/mv/armada38x/pmsu.c standard
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