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/* $OpenBSD: hitemp.c,v 1.2 2021/10/24 17:52:26 mpi 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 HI3660_OFFSET 0x040
#define HI3660_TEMP 0x01c
#define HI3660_TH 0x020
#define HI3660_LAG 0x028
#define HI3660_INT_EN 0x02c
#define HI3660_INT_CLR 0x030
#define HI3670_OFFSET 0x100
#define HI3670_INT_EN 0x064
#define HITEMP_NSENSORS 4
struct hitemp_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
bus_size_t sc_offset;
uint64_t (*sc_calc_temp)(uint64_t);
struct ksensor sc_sensors[HITEMP_NSENSORS];
struct ksensordev sc_sensordev;
};
int hitemp_match(struct device *, void *, void *);
void hitemp_attach(struct device *, struct device *, void *);
const struct cfattach hitemp_ca = {
sizeof (struct hitemp_softc), hitemp_match, hitemp_attach
};
struct cfdriver hitemp_cd = {
NULL, "hitemp", DV_DULL
};
struct hitemp_compat {
const char *compat;
bus_size_t offset;
uint64_t (*calc_temp)(uint64_t);
};
uint64_t hi3660_calc_temp(uint64_t);
uint64_t hi3670_calc_temp(uint64_t);
struct hitemp_compat hitemp_compat[] = {
{
"hsilicon,hi3660-tsensor",
HI3660_OFFSET, hi3660_calc_temp
},
{
"hisilicon,kirin970-tsensor",
HI3670_OFFSET, hi3670_calc_temp
}
};
void hitemp_refresh_sensors(void *);
int
hitemp_match(struct device *parent, void *match, void *aux)
{
struct fdt_attach_args *faa = aux;
int i;
for (i = 0; i < nitems(hitemp_compat); i++) {
if (OF_is_compatible(faa->fa_node, hitemp_compat[i].compat))
return 1;
}
return 0;
}
void
hitemp_attach(struct device *parent, struct device *self, void *aux)
{
struct hitemp_softc *sc = (struct hitemp_softc *)self;
struct fdt_attach_args *faa = aux;
int i;
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");
for (i = 0; i < nitems(hitemp_compat); i++) {
if (OF_is_compatible(faa->fa_node, hitemp_compat[i].compat)) {
break;
}
}
KASSERT(i < nitems(hitemp_compat));
sc->sc_offset = hitemp_compat[i].offset;
sc->sc_calc_temp = hitemp_compat[i].calc_temp;
/* Register sensors. */
strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
sizeof(sc->sc_sensordev.xname));
for (i = 0; i < HITEMP_NSENSORS; i++) {
sc->sc_sensors[i].type = SENSOR_TEMP;
sc->sc_sensors[i].flags = SENSOR_FINVALID;
sensor_attach(&sc->sc_sensordev, &sc->sc_sensors[i]);
}
sensordev_install(&sc->sc_sensordev);
sensor_task_register(sc, hitemp_refresh_sensors, 5);
}
uint64_t
hi3660_calc_temp(uint64_t value)
{
return 273150000 - 63780000 + value * 205000;
}
uint64_t
hi3670_calc_temp(uint64_t value)
{
return 273150000 - 73720000 + value * 216000;
}
void
hitemp_refresh_sensors(void *arg)
{
struct hitemp_softc *sc = arg;
bus_size_t offset = 0;
uint32_t value;
uint64_t temp;
int i;
for (i = 0; i < HITEMP_NSENSORS; i++) {
value = bus_space_read_4(sc->sc_iot, sc->sc_ioh,
offset + HI3660_TEMP);
temp = sc->sc_calc_temp(value);
sc->sc_sensors[i].value = temp;
sc->sc_sensors[i].flags &= ~SENSOR_FINVALID;
offset += sc->sc_offset;
}
}
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