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/* $OpenBSD: thmc50.c,v 1.4 2007/10/17 17:14:54 deraadt Exp $ */
/*
* Copyright (c) 2007 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>
/* THMC50 registers */
#define THMC50_TEMP0 0x27
#define THMC50_TEMP1 0x26
#define THMC50_TEMP2 0x20
/* Sensors */
#define THMC_TEMP0 0
#define THMC_TEMP1 1
#define THMC_TEMP2 2
#define THMC_NUM_SENSORS 3
struct thmc_softc {
struct device sc_dev;
i2c_tag_t sc_tag;
i2c_addr_t sc_addr;
struct ksensor sc_sensor[THMC_NUM_SENSORS];
struct ksensordev sc_sensordev;
};
int thmc_match(struct device *, void *, void *);
void thmc_attach(struct device *, struct device *, void *);
void thmc_refresh(void *);
struct cfattach thmc_ca = {
sizeof(struct thmc_softc), thmc_match, thmc_attach
};
struct cfdriver thmc_cd = {
NULL, "thmc", DV_DULL
};
int
thmc_match(struct device *parent, void *match, void *aux)
{
struct i2c_attach_args *ia = aux;
if (strcmp(ia->ia_name, "thmc50") == 0 ||
strcmp(ia->ia_name, "adm1022") == 0 ||
strcmp(ia->ia_name, "adm1028") == 0)
return (1);
return (0);
}
void
thmc_attach(struct device *parent, struct device *self, void *aux)
{
struct thmc_softc *sc = (struct thmc_softc *)self;
struct i2c_attach_args *ia = aux;
int numsensors = THMC_NUM_SENSORS;
int i;
sc->sc_tag = ia->ia_tag;
sc->sc_addr = ia->ia_addr;
printf(": %s", ia->ia_name);
/* Initialize sensor data. */
strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
sizeof(sc->sc_sensordev.xname));
sc->sc_sensor[THMC_TEMP0].type = SENSOR_TEMP;
strlcpy(sc->sc_sensor[THMC_TEMP0].desc, "Internal",
sizeof(sc->sc_sensor[THMC_TEMP0].desc));
sc->sc_sensor[THMC_TEMP1].type = SENSOR_TEMP;
strlcpy(sc->sc_sensor[THMC_TEMP1].desc, "External",
sizeof(sc->sc_sensor[THMC_TEMP1].desc));
if (strcmp(ia->ia_name, "adm1022") == 0) {
/* Only the adm1022 has a THMC50_TEMP2 sensor */
sc->sc_sensor[THMC_TEMP2].type = SENSOR_TEMP;
strlcpy(sc->sc_sensor[THMC_TEMP2].desc, "External",
sizeof(sc->sc_sensor[THMC_TEMP2].desc));
} else {
sc->sc_sensor[THMC_TEMP2].type = -1;
numsensors--;
}
if (sensor_task_register(sc, thmc_refresh, 5) == NULL) {
printf(", unable to register update task\n");
return;
}
for (i = 0; i < numsensors; i++)
sensor_attach(&sc->sc_sensordev, &sc->sc_sensor[i]);
sensordev_install(&sc->sc_sensordev);
printf("\n");
}
void
thmc_refresh(void *arg)
{
struct thmc_softc *sc = arg;
u_int8_t cmd;
int8_t sdata;
iic_acquire_bus(sc->sc_tag, 0);
cmd = THMC50_TEMP0;
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, &sdata, sizeof sdata, 0) == 0) {
sc->sc_sensor[THMC_TEMP0].value = 273150000 + 1000000 * sdata;
sc->sc_sensor[THMC_TEMP0].flags &= ~SENSOR_FINVALID;
} else
sc->sc_sensor[THMC_TEMP0].flags |= SENSOR_FINVALID;
cmd = THMC50_TEMP1;
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, &sdata, sizeof sdata, 0) == 0) {
sc->sc_sensor[THMC_TEMP1].value = 273150000 + 1000000 * sdata;
sc->sc_sensor[THMC_TEMP1].flags &= ~SENSOR_FINVALID;
} else
sc->sc_sensor[THMC_TEMP1].flags |= SENSOR_FINVALID;
if (sc->sc_sensor[THMC_TEMP2].type > 0) {
cmd = THMC50_TEMP2;
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, &sdata, sizeof sdata, 0) == 0) {
sc->sc_sensor[THMC_TEMP2].value = 273150000 + 1000000 * sdata;
sc->sc_sensor[THMC_TEMP2].flags &= ~SENSOR_FINVALID;
} else
sc->sc_sensor[THMC_TEMP2].flags |= SENSOR_FINVALID;
}
iic_release_bus(sc->sc_tag, 0);
}
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