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/* $OpenBSD: adm1021.c,v 1.18 2005/12/29 14:51:08 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_STATUS_INVAL 0x7f
#define ADM1021_STATUS_NOEXT 0x40
#define ADM1021_CONFIG_READ 0x03
#define ADM1021_CONFIG_WRITE 0x09
#define ADM1021_CONFIG_RUN 0x40
#define ADM1021_COMPANY 0xfe /* contains 0x41 */
#define ADM1021_STEPPING 0xff /* contains 0x3? */
/* Sensors */
#define ADMTEMP_EXT 0
#define ADMTEMP_INT 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 sc_noexternal;
};
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 ||
strcmp(ia->ia_name, "adm1032") == 0 ||
strcmp(ia->ia_name, "xeontemp") == 0 ||
strcmp(ia->ia_name, "maxim1617") == 0)
return (1);
return (0);
}
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;
u_int8_t cmd, data, stat;
int xeon = 0, i;
sc->sc_tag = ia->ia_tag;
sc->sc_addr = ia->ia_addr;
if (strcmp(ia->ia_name, "xeontemp") == 0) {
printf(": Xeon");
xeon = 1;
} else
printf(": %s", ia->ia_name);
iic_acquire_bus(sc->sc_tag, 0);
cmd = ADM1021_CONFIG_READ;
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
iic_release_bus(sc->sc_tag, 0);
printf(", cannot get control register\n");
return;
}
if (data & ADM1021_CONFIG_RUN) {
cmd = ADM1021_STATUS;
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, &stat, sizeof stat, 0)) {
iic_release_bus(sc->sc_tag, 0);
printf(", cannot read status register\n");
return;
}
if ((stat & ADM1021_STATUS_INVAL) == ADM1021_STATUS_INVAL) {
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, &stat, sizeof stat, 0)) {
iic_release_bus(sc->sc_tag, 0);
printf(", cannot read status register\n");
return;
}
}
/* means external is dead */
if ((stat & ADM1021_STATUS_INVAL) != ADM1021_STATUS_INVAL &&
(stat & ADM1021_STATUS_NOEXT))
sc->sc_noexternal = 1;
data &= ~ADM1021_CONFIG_RUN;
cmd = ADM1021_CONFIG_WRITE;
if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
iic_release_bus(sc->sc_tag, 0);
printf(", cannot set control register\n");
return;
}
}
iic_release_bus(sc->sc_tag, 0);
/* 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_EXT].type = SENSOR_TEMP;
strlcpy(sc->sc_sensor[ADMTEMP_EXT].desc,
xeon ? "Xeon" : "External",
sizeof(sc->sc_sensor[ADMTEMP_EXT].desc));
sc->sc_sensor[ADMTEMP_INT].type = SENSOR_TEMP;
strlcpy(sc->sc_sensor[ADMTEMP_INT].desc,
xeon ? "Xeon" : "Internal",
sizeof(sc->sc_sensor[ADMTEMP_INT].desc));
if (sensor_task_register(sc, admtemp_refresh, 5)) {
printf(", unable to register update task\n");
return;
}
for (i = 0; i < (sc->sc_noexternal ? 1 : 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;
int8_t sdata;
iic_acquire_bus(sc->sc_tag, 0);
if (sc->sc_noexternal == 0) {
cmd = ADM1021_EXT_TEMP;
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr,
&cmd, sizeof cmd, &sdata, sizeof sdata, 0) == 0) {
if (sdata == 0x7f) {
sc->sc_sensor[ADMTEMP_EXT].flags |= SENSOR_FINVALID;
} else {
sc->sc_sensor[ADMTEMP_EXT].value =
273150000 + 1000000 * sdata;
sc->sc_sensor[ADMTEMP_EXT].flags &= ~SENSOR_FINVALID;
}
}
} else
sc->sc_sensor[ADMTEMP_EXT].flags |= SENSOR_FINVALID;
cmd = ADM1021_INT_TEMP;
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr,
&cmd, sizeof cmd, &sdata, sizeof sdata, 0) == 0) {
if (sdata == 0x7f) {
sc->sc_sensor[ADMTEMP_INT].flags |= SENSOR_FINVALID;
} else {
sc->sc_sensor[ADMTEMP_INT].value =
273150000 + 1000000 * sdata;
sc->sc_sensor[ADMTEMP_INT].flags &= ~SENSOR_FINVALID;
}
}
iic_release_bus(sc->sc_tag, 0);
}
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