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/* $OpenBSD: adm1021.c,v 1.1 2005/12/22 23:44:12 deraadt Exp $ */
/*
* Copyright (c) 2005 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>
/* ADM 1021 registers */
#define ADM1021_INT_TEMP 0x00
#define ADM1021_EXT_TEMP 0x01
#define ADM1021_STATUS 0x02
#define ADM1021_COMPANY 0xfe /* contains 0x41 */
#define ADM1021_STEPPING 0xff /* contains 0x3? */
/* Sensors */
#define ADMTEMP_INT 0
#define ADMTEMP_EXT 1
#define ADMTEMP_NUM_SENSORS 2
struct admtemp_softc {
struct device sc_dev;
i2c_tag_t sc_tag;
i2c_addr_t sc_addr;
struct sensor sc_sensor[ADMTEMP_NUM_SENSORS];
};
int admtemp_match(struct device *, void *, void *);
void admtemp_attach(struct device *, struct device *, void *);
void admtemp_refresh(void *);
struct cfattach admtemp_ca = {
sizeof(struct admtemp_softc), admtemp_match, admtemp_attach
};
struct cfdriver admtemp_cd = {
NULL, "admtemp", DV_DULL
};
int
admtemp_match(struct device *parent, void *match, void *aux)
{
struct i2c_attach_args *ia = aux;
if (strcmp(ia->ia_name, "adm1021") == 0) {
/*
* should also ensure that
* config & 0x80 == 0x00
* status1 & 0xc0 == 0x00
* status2 & 0xbc == 0x00
* before accepting this to be for real
*/
return (1);
}
return (1);
}
void
admtemp_attach(struct device *parent, struct device *self, void *aux)
{
struct admtemp_softc *sc = (struct admtemp_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. */
for (i = 0; i < ADMTEMP_NUM_SENSORS; i++)
strlcpy(sc->sc_sensor[i].device, sc->sc_dev.dv_xname,
sizeof(sc->sc_sensor[i].device));
sc->sc_sensor[ADMTEMP_INT].type = SENSOR_TEMP;
strlcpy(sc->sc_sensor[ADMTEMP_INT].desc, "Internal",
sizeof(sc->sc_sensor[ADMTEMP_INT].desc));
sc->sc_sensor[ADMTEMP_EXT].type = SENSOR_TEMP;
strlcpy(sc->sc_sensor[ADMTEMP_EXT].desc, "External",
sizeof(sc->sc_sensor[ADMTEMP_EXT].desc));
if (sensor_task_register(sc, admtemp_refresh, 5)) {
printf(", unable to register update task\n");
return;
}
for (i = 0; i < ADMTEMP_NUM_SENSORS; i++)
SENSOR_ADD(&sc->sc_sensor[i]);
printf("\n");
}
void
admtemp_refresh(void *arg)
{
struct admtemp_softc *sc = arg;
u_int8_t cmd, data;
iic_acquire_bus(sc->sc_tag, 0);
cmd = ADM1021_INT_TEMP;
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0) == 0)
sc->sc_sensor[ADMTEMP_INT].value = 273150000 + 1000000 * data;
cmd = ADM1021_EXT_TEMP;
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0) == 0)
sc->sc_sensor[ADMTEMP_EXT].value = 273150000 + 1000000 * data;
iic_release_bus(sc->sc_tag, 0);
}
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