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/* $OpenBSD: adt7462.c,v 1.5 2008/04/22 03:05:03 cnst Exp $ */
/*
* Copyright (c) 2008 Theo de Raadt
*
* 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 <dev/i2c/i2cvar.h>
#define ADT7462_INT_TEMPL 0x88
#define ADT7462_INT_TEMPH 0x89
#define ADT7462_EXT_TEMP1L 0x8a
#define ADT7462_EXT_TEMP1H 0x8b
#define ADT7462_EXT_TEMP2L 0x8c
#define ADT7462_EXT_TEMP2H 0x8d
#define ADT7462_EXT_TEMP3L 0x8e
#define ADT7462_EXT_TEMP3H 0x8f
/* Sensors */
#define ADTFSM_TEMP0 0
#define ADTFSM_TEMP1 1
#define ADTFSM_TEMP2 2
#define ADTFSM_TEMP3 3
#define ADTFSM_NUM_SENSORS 4
struct adtfsm_softc {
struct device sc_dev;
i2c_tag_t sc_tag;
i2c_addr_t sc_addr;
int sc_fanmul;
struct ksensor sc_sensor[ADTFSM_NUM_SENSORS];
struct ksensordev sc_sensordev;
};
int adtfsm_match(struct device *, void *, void *);
void adtfsm_attach(struct device *, struct device *, void *);
void adtfsm_refresh(void *);
struct cfattach adtfsm_ca = {
sizeof(struct adtfsm_softc), adtfsm_match, adtfsm_attach
};
struct cfdriver adtfsm_cd = {
NULL, "adtfsm", DV_DULL
};
int
adtfsm_match(struct device *parent, void *match, void *aux)
{
struct i2c_attach_args *ia = aux;
if (strcmp(ia->ia_name, "adt7462") == 0)
return (1);
return (0);
}
void
adtfsm_attach(struct device *parent, struct device *self, void *aux)
{
struct adtfsm_softc *sc = (struct adtfsm_softc *)self;
struct i2c_attach_args *ia = aux;
int i;
sc->sc_tag = ia->ia_tag;
sc->sc_addr = ia->ia_addr;
/* Initialize sensor data. */
strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
sizeof(sc->sc_sensordev.xname));
for (i = 0; i < 4; i++)
sc->sc_sensor[i].type = SENSOR_TEMP;
for (i = 0; i < 1; i++)
strlcpy(sc->sc_sensor[i].desc, "Internal",
sizeof(sc->sc_sensor[i].desc));
for (i = 1; i < 4; i++)
strlcpy(sc->sc_sensor[i].desc, "External",
sizeof(sc->sc_sensor[i].desc));
if (sensor_task_register(sc, adtfsm_refresh, 5) == NULL) {
printf(", unable to register update task\n");
return;
}
for (i = 0; i < ADTFSM_NUM_SENSORS; i++)
sensor_attach(&sc->sc_sensordev, &sc->sc_sensor[i]);
sensordev_install(&sc->sc_sensordev);
printf("\n");
}
void
adtfsm_refresh(void *arg)
{
struct adtfsm_softc *sc = arg;
u_int8_t cmdh, cmdl, datah = 0x01, datal = 0x02;
short t;
int i;
iic_acquire_bus(sc->sc_tag, 0);
for (i = 0; i < 4; i++) {
cmdl = ADT7462_INT_TEMPL + i * 2;
cmdh = ADT7462_INT_TEMPH + i * 2;
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmdl, sizeof cmdl, &datal,
sizeof datal, 0) == 0 &&
iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmdh, sizeof cmdh, &datah,
sizeof datah, 0) == 0) {
t = (((datah << 8) | datal) >> 6) - (64 << 2);
sc->sc_sensor[i].value = 273150000 + t * 250000;
sc->sc_sensor[i].flags &= ~SENSOR_FINVALID;
} else
sc->sc_sensor[i].flags |= SENSOR_FINVALID;
printf("val %02x %02x\n", datah, datal);
}
iic_release_bus(sc->sc_tag, 0);
}
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