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/* $OpenBSD: sxitemp.c,v 1.2 2017/12/31 15:41:25 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;
uint64_t (*sc_calc_temp0)(int64_t);
uint64_t (*sc_calc_temp1)(int64_t);
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
};
uint64_t sxitemp_r40_calc_temp(int64_t);
uint64_t sxitemp_h5_calc_temp0(int64_t);
uint64_t sxitemp_h5_calc_temp1(int64_t);
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,sun8i-r40-ths") ||
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);
if (OF_is_compatible(faa->fa_node, "allwinner,sun8i-r40-ths")) {
sc->sc_calc_temp0 = sxitemp_r40_calc_temp;
sc->sc_calc_temp1 = sxitemp_r40_calc_temp;
} else {
sc->sc_calc_temp0 = sxitemp_h5_calc_temp0;
sc->sc_calc_temp1 = sxitemp_h5_calc_temp1;
}
/* 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_r40_calc_temp(int64_t data)
{
/* From BSP as the R40 User Manual says T.B.D. */
return -112500 * data + 250000000;
}
uint64_t
sxitemp_h5_calc_temp0(int64_t data)
{
if (data > 0x500)
return -119100 * data + 223000000;
else
return -145200 * data + 259000000;
}
uint64_t
sxitemp_h5_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 = sc->sc_calc_temp0(data) + 273150000;
sc->sc_sensors[0].flags &= ~SENSOR_FINVALID;
data = HREAD4(sc, THS1_DATA);
sc->sc_sensors[1].value = sc->sc_calc_temp1(data) + 273150000;
sc->sc_sensors[1].flags &= ~SENSOR_FINVALID;
}
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