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/* $OpenBSD: mvtemp.c,v 1.1 2018/03/31 16:35:15 kettenis Exp $ */
/*
* Copyright (c) 2018 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/bus.h>
#include <machine/fdt.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/fdt.h>
/* Registers */
#define TEMP_STAT 0x0000
#define TEMP_CTRL0 0x0000
#define TEMP_CTRL0_TSEN_TC_TRIM_MASK 0x7
#define TEMP_CTRL0_TSEN_TC_TRIM_VAL 0x3
#define TEMP_CTRL1 0x0004
#define TEMP_CTRL1_TSEN_RESET (1 << 8)
struct mvtemp_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_stat_ioh;
bus_space_handle_t sc_ctrl_ioh;
uint32_t sc_stat_valid;
int32_t (*sc_calc_temp)(uint32_t);
struct ksensor sc_sensor;
struct ksensordev sc_sensordev;
};
int mvtemp_match(struct device *, void *, void *);
void mvtemp_attach(struct device *, struct device *, void *);
struct cfattach mvtemp_ca = {
sizeof (struct mvtemp_softc), mvtemp_match, mvtemp_attach
};
struct cfdriver mvtemp_cd = {
NULL, "mvtemp", DV_DULL
};
struct mvtemp_compat {
const char *compat;
uint32_t stat_valid;
void (*init)(struct mvtemp_softc *);
int32_t (*calc_temp)(uint32_t);
};
void mvtemp_ap806_init(struct mvtemp_softc *);
int32_t mvtemp_ap806_calc_temp(uint32_t);
void mvtemp_cp110_init(struct mvtemp_softc *);
int32_t mvtemp_cp110_calc_temp(uint32_t);
struct mvtemp_compat mvtemp_compat[] = {
{
"marvell,armada-ap806-thermal", (1 << 16),
mvtemp_ap806_init, mvtemp_ap806_calc_temp,
},
{
"marvell,armada-cp110-thermal", (1 << 10),
mvtemp_cp110_init, mvtemp_cp110_calc_temp,
}
};
void mvtemp_refresh_sensors(void *);
int
mvtemp_match(struct device *parent, void *match, void *aux)
{
struct fdt_attach_args *faa = aux;
int i;
for (i = 0; i < nitems(mvtemp_compat); i++) {
if (OF_is_compatible(faa->fa_node, mvtemp_compat[i].compat))
return 1;
}
return 0;
}
void
mvtemp_attach(struct device *parent, struct device *self, void *aux)
{
struct mvtemp_softc *sc = (struct mvtemp_softc *)self;
struct fdt_attach_args *faa = aux;
int i;
if (faa->fa_nreg < 2) {
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_stat_ioh)) {
printf(": can't map registers\n");
return;
}
if (bus_space_map(sc->sc_iot, faa->fa_reg[1].addr,
faa->fa_reg[1].size, 0, &sc->sc_ctrl_ioh)) {
bus_space_unmap(sc->sc_iot, sc->sc_stat_ioh,
faa->fa_reg[0].size);
printf(": can't map registers\n");
return;
}
printf("\n");
for (i = 0; i < nitems(mvtemp_compat); i++) {
if (OF_is_compatible(faa->fa_node, mvtemp_compat[i].compat)) {
break;
}
}
KASSERT(i < nitems(mvtemp_compat));
mvtemp_compat[i].init(sc);
sc->sc_stat_valid = mvtemp_compat[i].stat_valid;
sc->sc_calc_temp = mvtemp_compat[i].calc_temp;
/* Register sensors. */
strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
sizeof(sc->sc_sensordev.xname));
sc->sc_sensor.type = SENSOR_TEMP;
sc->sc_sensor.flags = SENSOR_FINVALID;
sensor_attach(&sc->sc_sensordev, &sc->sc_sensor);
sensordev_install(&sc->sc_sensordev);
sensor_task_register(sc, mvtemp_refresh_sensors, 5);
}
/* AP806 */
void
mvtemp_ap806_init(struct mvtemp_softc *sc)
{
}
int32_t
mvtemp_ap806_calc_temp(uint32_t stat)
{
stat = ((stat & 0x3ff) ^ 0x200) - 0x200;
return (stat * 423000) + 150000000 + 273150000;
}
/* CP110 */
void
mvtemp_cp110_init(struct mvtemp_softc *sc)
{
uint32_t ctrl;
ctrl = bus_space_read_4(sc->sc_iot, sc->sc_ctrl_ioh, TEMP_CTRL1);
ctrl |= TEMP_CTRL1_TSEN_RESET;
bus_space_write_4(sc->sc_iot, sc->sc_ctrl_ioh, TEMP_CTRL1, ctrl);
ctrl = bus_space_read_4(sc->sc_iot, sc->sc_ctrl_ioh, TEMP_CTRL0);
ctrl &= ~TEMP_CTRL0_TSEN_TC_TRIM_MASK;
ctrl |= TEMP_CTRL0_TSEN_TC_TRIM_VAL;
bus_space_write_4(sc->sc_iot, sc->sc_ctrl_ioh, TEMP_CTRL0, ctrl);
}
int32_t
mvtemp_cp110_calc_temp(uint32_t stat)
{
return ((stat & 0x3ff) * 476100) - 279100000 + 273150000;
}
void
mvtemp_refresh_sensors(void *arg)
{
struct mvtemp_softc *sc = arg;
int32_t stat, temp;
stat = bus_space_read_4(sc->sc_iot, sc->sc_stat_ioh, TEMP_STAT);
temp = sc->sc_calc_temp(stat);
sc->sc_sensor.value = temp;
if ((stat & sc->sc_stat_valid) && temp >= 0)
sc->sc_sensor.flags &= ~SENSOR_FINVALID;
else
sc->sc_sensor.flags |= SENSOR_FINVALID;
}
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