--- /dev/null
+/* $OpenBSD: sxitemp.c,v 1.1 2017/12/31 13:54:09 kettenis Exp $ */
+/*
+ * Copyright (c) 2017 Mark Kettenis <kettenis@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <sys/sensors.h>
+
+#include <machine/intr.h>
+#include <machine/bus.h>
+#include <machine/fdt.h>
+
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_clock.h>
+#include <dev/ofw/ofw_misc.h>
+#include <dev/ofw/ofw_pinctrl.h>
+#include <dev/ofw/fdt.h>
+
+/* Registers */
+#define THS_CTRL0 0x0000
+#define THS_CTRL0_SENSOR_ACQ(x) ((x) & 0xffff)
+#define THS_CTRL2 0x0040
+#define THS_CTRL2_ADC_ACQ(x) (((x) & 0xffff) << 16)
+#define THS_CTRL2_SENSE1_EN (1 << 1)
+#define THS_CTRL2_SENSE0_EN (1 << 0)
+#define THS_INT_CTRL 0x0044
+#define THS_INT_CTRL_THERMAL_PER(x) (((x) & 0xfffff) << 12)
+#define THS_FILTER 0x0070
+#define THS_FILTER_EN (1 << 2)
+#define THS_FILTER_TYPE(x) ((x) & 0x3)
+#define THS0_DATA 0x0080
+#define THS1_DATA 0x0084
+
+#define HREAD4(sc, reg) \
+ (bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (reg)))
+#define HWRITE4(sc, reg, val) \
+ bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (reg), (val))
+
+struct sxitemp_softc {
+ struct device sc_dev;
+ bus_space_tag_t sc_iot;
+ bus_space_handle_t sc_ioh;
+
+ struct ksensor sc_sensors[2];
+ struct ksensordev sc_sensordev;
+};
+
+int sxitemp_match(struct device *, void *, void *);
+void sxitemp_attach(struct device *, struct device *, void *);
+
+struct cfattach sxitemp_ca = {
+ sizeof (struct sxitemp_softc), sxitemp_match, sxitemp_attach
+};
+
+struct cfdriver sxitemp_cd = {
+ NULL, "sxitemp", DV_DULL
+};
+
+void sxitemp_refresh_sensors(void *);
+
+int
+sxitemp_match(struct device *parent, void *match, void *aux)
+{
+ struct fdt_attach_args *faa = aux;
+
+ return (OF_is_compatible(faa->fa_node, "allwinner,sun50i-h5-ths"));
+}
+
+void
+sxitemp_attach(struct device *parent, struct device *self, void *aux)
+{
+ struct sxitemp_softc *sc = (struct sxitemp_softc *)self;
+ struct fdt_attach_args *faa = aux;
+ int node = faa->fa_node;
+
+ if (faa->fa_nreg < 1) {
+ printf(": no registers\n");
+ return;
+ }
+
+ sc->sc_iot = faa->fa_iot;
+ if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
+ faa->fa_reg[0].size, 0, &sc->sc_ioh)) {
+ printf(": can't map registers\n");
+ return;
+ }
+
+ printf("\n");
+
+ pinctrl_byname(node, "default");
+
+ clock_enable_all(node);
+ reset_deassert_all(node);
+
+ /* Start data acquisition. */
+ HWRITE4(sc, THS_FILTER, THS_FILTER_EN | THS_FILTER_TYPE(1));
+ HWRITE4(sc, THS_INT_CTRL, THS_INT_CTRL_THERMAL_PER(800));
+ HWRITE4(sc, THS_CTRL0, THS_CTRL0_SENSOR_ACQ(31));
+ HWRITE4(sc, THS_CTRL2, THS_CTRL2_ADC_ACQ(31) |
+ THS_CTRL2_SENSE0_EN | THS_CTRL2_SENSE1_EN);
+
+ /* Register sensors. */
+ strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
+ sizeof(sc->sc_sensordev.xname));
+ strlcpy(sc->sc_sensors[0].desc, "CPU", sizeof(sc->sc_sensors[0].desc));
+ sc->sc_sensors[0].type = SENSOR_TEMP;
+ sc->sc_sensors[0].flags = SENSOR_FINVALID;
+ sensor_attach(&sc->sc_sensordev, &sc->sc_sensors[0]);
+ strlcpy(sc->sc_sensors[1].desc, "GPU", sizeof(sc->sc_sensors[1].desc));
+ sc->sc_sensors[1].type = SENSOR_TEMP;
+ sc->sc_sensors[1].flags = SENSOR_FINVALID;
+ sensor_attach(&sc->sc_sensordev, &sc->sc_sensors[1]);
+ sensordev_install(&sc->sc_sensordev);
+ sensor_task_register(sc, sxitemp_refresh_sensors, 5);
+}
+
+uint64_t
+sxitemp_calc_temp0(int64_t data)
+{
+ if (data > 0x500)
+ return -119100 * data + 223000000;
+ else
+ return -145200 * data + 259000000;
+}
+
+uint64_t
+sxitemp_calc_temp1(int64_t data)
+{
+ if (data > 0x500)
+ return -119100 * data + 223000000;
+ else
+ return -159000 * data + 276000000;
+}
+
+void
+sxitemp_refresh_sensors(void *arg)
+{
+ struct sxitemp_softc *sc = arg;
+ uint32_t data;
+
+ data = HREAD4(sc, THS0_DATA);
+ sc->sc_sensors[0].value = sxitemp_calc_temp0(data) + 273150000;
+ sc->sc_sensors[0].flags &= ~SENSOR_FINVALID;
+
+ data = HREAD4(sc, THS1_DATA);
+ sc->sc_sensors[1].value = sxitemp_calc_temp1(data) + 273150000;
+ sc->sc_sensors[1].flags &= ~SENSOR_FINVALID;
+}
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