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/* $OpenBSD: imxtmu.c,v 1.2 2020/03/20 09:13:03 patrick Exp $ */
/*
* Copyright (c) 2018 Patrick Wildt <patrick@blueri.se>
*
* 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/malloc.h>
#include <sys/device.h>
#include <sys/sensors.h>
#include <sys/timeout.h>
#include <machine/bus.h>
#include <machine/fdt.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/fdt.h>
#include <dev/ofw/ofw_clock.h>
/* i.MX8MQ registers */
#define TMU_MQ_TMR 0x000
#define TMU_MQ_TMR_ME (1U << 31)
#define TMU_MQ_TMR_ALPF (0x3 << 26)
#define TMU_MQ_TMR_SENSOR(x) (1 << (15 - (x)))
#define TMU_MQ_TMTMIR 0x008
#define TMU_MQ_TMTMIR_DEFAULT 0xf
#define TMU_MQ_TIER 0x020
#define TMU_MQ_TTCFGR 0x080
#define TMU_MQ_TSCFGR 0x084
#define TMU_MQ_TRITSR(x) (0x100 + ((x) * 0x10))
#define TMU_MQ_TTR0CR 0xf10
#define TMU_MQ_TTR1CR 0xf14
#define TMU_MQ_TTR2CR 0xf18
#define TMU_MQ_TTR3CR 0xf1c
/* i.MX8MM registers */
#define TMU_MM_TER 0x000
#define TMU_MM_TER_EN (1U << 31)
#define TMU_MM_TRITSR 0x020
#define TMU_MM_TRITSR_LOW_LIMIT 10
#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))
#define HSET4(sc, reg, bits) \
HWRITE4((sc), (reg), HREAD4((sc), (reg)) | (bits))
#define HCLR4(sc, reg, bits) \
HWRITE4((sc), (reg), HREAD4((sc), (reg)) & ~(bits))
struct imxtmu_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
int sc_sensorid;
struct ksensor sc_sensor;
struct ksensordev sc_sensordev;
struct timeout sc_sensorto;
};
int imxtmu_match(struct device *, void *, void *);
void imxtmu_attach(struct device *, struct device *, void *);
void imxtmu_mm_refresh_sensors(void *);
void imxtmu_mq_refresh_sensors(void *);
struct cfattach imxtmu_ca = {
sizeof(struct imxtmu_softc), imxtmu_match, imxtmu_attach
};
struct cfdriver imxtmu_cd = {
NULL, "imxtmu", DV_DULL
};
int
imxtmu_match(struct device *parent, void *match, void *aux)
{
struct fdt_attach_args *faa = aux;
return OF_is_compatible(faa->fa_node, "fsl,imx8mm-tmu") ||
OF_is_compatible(faa->fa_node, "fsl,imx8mq-tmu");
}
void
imxtmu_attach(struct device *parent, struct device *self, void *aux)
{
struct imxtmu_softc *sc = (struct imxtmu_softc *)self;
struct fdt_attach_args *faa = aux;
uint32_t range[4], *calibration;
int i, len;
if (faa->fa_nreg < 1)
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))
panic("%s: bus_space_map failed!", __func__);
printf("\n");
clock_enable_all(faa->fa_node);
strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
sizeof(sc->sc_sensordev.xname));
strlcpy(sc->sc_sensor.desc, "core",
sizeof(sc->sc_sensor.desc));
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);
if (OF_is_compatible(faa->fa_node, "fsl,imx8mm-tmu")) {
HSET4(sc, TMU_MM_TER, TMU_MM_TER_EN);
sensor_task_register(sc, imxtmu_mm_refresh_sensors, 5);
}
if (OF_is_compatible(faa->fa_node, "fsl,imx8mq-tmu")) {
/*
* XXX: This thermal unit can show temperatures per node, and
* XXX: the thermal-zones can reference this. But since we do
* XXX: not register ourselves with such a infrastructure we can
* XXX: live with just extracting sensor 0: the CPU.
*/
sc->sc_sensorid = 0;
HWRITE4(sc, TMU_MQ_TIER, 0);
HWRITE4(sc, TMU_MQ_TMTMIR, TMU_MQ_TMTMIR_DEFAULT);
HWRITE4(sc, TMU_MQ_TMR, 0);
if (OF_getpropintarray(faa->fa_node, "fsl,tmu-range", range,
sizeof(range)) != sizeof(range))
return;
HWRITE4(sc, TMU_MQ_TTR0CR, range[0]);
HWRITE4(sc, TMU_MQ_TTR1CR, range[1]);
HWRITE4(sc, TMU_MQ_TTR2CR, range[2]);
HWRITE4(sc, TMU_MQ_TTR3CR, range[3]);
len = OF_getproplen(faa->fa_node, "fsl,tmu-calibration");
if (len <= 0 || (len % 8) != 0)
return;
calibration = malloc(len, M_TEMP, M_WAITOK);
OF_getpropintarray(faa->fa_node, "fsl,tmu-calibration", calibration,
len);
for (i = 0; i < (len / 4); i += 2) {
HWRITE4(sc, TMU_MQ_TTCFGR, calibration[i + 0]);
HWRITE4(sc, TMU_MQ_TSCFGR, calibration[i + 1]);
}
free(calibration, M_TEMP, len);
HWRITE4(sc, TMU_MQ_TMR, TMU_MQ_TMR_SENSOR(sc->sc_sensorid) |
TMU_MQ_TMR_ME | TMU_MQ_TMR_ALPF);
sensor_task_register(sc, imxtmu_mq_refresh_sensors, 5);
}
}
void
imxtmu_mm_refresh_sensors(void *arg)
{
struct imxtmu_softc *sc = (struct imxtmu_softc *)arg;
uint32_t value;
value = HREAD4(sc, TMU_MM_TRITSR);
if (value < TMU_MM_TRITSR_LOW_LIMIT)
return;
value = (value & 0xff) * 1000000;
sc->sc_sensor.value = value + 273150000;
sc->sc_sensor.flags &= ~SENSOR_FINVALID;
}
void
imxtmu_mq_refresh_sensors(void *arg)
{
struct imxtmu_softc *sc = (struct imxtmu_softc *)arg;
uint32_t value;
value = HREAD4(sc, TMU_MQ_TRITSR(sc->sc_sensorid));
value = (value & 0xff) * 1000000;
sc->sc_sensor.value = value + 273150000;
sc->sc_sensor.flags &= ~SENSOR_FINVALID;
}
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