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/* $OpenBSD: adt7460.c,v 1.4 2005/12/27 17:18:18 deraadt Exp $ */
/*
* Copyright (c) 2005 Mark Kettenis
*
* 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>
/* ADT7460 registers */
#define ADT7460_2_5V 0x20
#define ADT7460_VCCP1 0x22
#define ADT7460_REM1_TEMP 0x25
#define ADT7460_LOCAL_TEMP 0x26
#define ADT7460_REM2_TEMP 0x27
#define ADT7460_TACH1L 0x28
#define ADT7460_TACH1H 0x29
#define ADT7460_TACH2L 0x2a
#define ADT7460_TACH2H 0x2b
#define ADT7460_TACH3L 0x2c
#define ADT7460_TACH3H 0x2d
#define ADT7460_TACH4L 0x2e
#define ADT7460_TACH4H 0x2f
#define ADT7460_REVISION 0x3f
#define ADT7460_CONFIG 0x40
/* Sensors */
#define ADT_2_5V 0
#define ADT_VCCP1 1
#define ADT_REM1_TEMP 2
#define ADT_LOCAL_TEMP 3
#define ADT_REM2_TEMP 4
#define ADT_TACH1 5
#define ADT_TACH2 6
#define ADT_TACH3 7
#define ADT_TACH4 8
#define ADT_NUM_SENSORS 9
struct adt_softc {
struct device sc_dev;
i2c_tag_t sc_tag;
i2c_addr_t sc_addr;
int sc_chip;
struct sensor sc_sensor[ADT_NUM_SENSORS];
};
int adt_match(struct device *, void *, void *);
void adt_attach(struct device *, struct device *, void *);
void adt_refresh(void *);
struct cfattach adt_ca = {
sizeof(struct adt_softc), adt_match, adt_attach
};
struct cfdriver adt_cd = {
NULL, "adt", DV_DULL
};
int
adt_match(struct device *parent, void *match, void *aux)
{
struct i2c_attach_args *ia = aux;
if (strcmp(ia->ia_name, "adt7460") == 0 ||
strcmp(ia->ia_name, "adt7467") == 0 ||
strcmp(ia->ia_name, "adt7476") == 0 ||
strcmp(ia->ia_name, "lm85") == 0 ||
strcmp(ia->ia_name, "emc6d10x") == 0)
return (1);
return (0);
}
void
adt_attach(struct device *parent, struct device *self, void *aux)
{
struct adt_softc *sc = (struct adt_softc *)self;
struct i2c_attach_args *ia = aux;
u_int8_t cmd, rev, data;
int i;
sc->sc_tag = ia->ia_tag;
sc->sc_addr = ia->ia_addr;
iic_acquire_bus(sc->sc_tag, 0);
sc->sc_chip = 7460;
/* check for the fancy "extension" chips XXX */
if (strcmp(ia->ia_name, "adt7467") == 0 ||
strcmp(ia->ia_name, "adt7467") == 0)
sc->sc_chip = 7467;
cmd = ADT7460_REVISION;
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, &rev, sizeof rev, 0)) {
iic_release_bus(sc->sc_tag, 0);
printf(": cannot read REV register\n");
return;
}
if (sc->sc_chip == 7460) {
data = 1;
cmd = ADT7460_CONFIG;
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);
printf(": %s (ADT%d) rev %x", ia->ia_name, sc->sc_chip, rev);
/* Initialize sensor data. */
for (i = 0; i < ADT_NUM_SENSORS; i++)
strlcpy(sc->sc_sensor[i].device, sc->sc_dev.dv_xname,
sizeof(sc->sc_sensor[i].device));
sc->sc_sensor[ADT_2_5V].type = SENSOR_VOLTS_DC;
strlcpy(sc->sc_sensor[ADT_2_5V].desc, "+2.5Vin",
sizeof(sc->sc_sensor[ADT_2_5V].desc));
sc->sc_sensor[ADT_VCCP1].type = SENSOR_VOLTS_DC;
strlcpy(sc->sc_sensor[ADT_VCCP1].desc, "Vccp1",
sizeof(sc->sc_sensor[ADT_VCCP1].desc));
sc->sc_sensor[ADT_REM1_TEMP].type = SENSOR_TEMP;
strlcpy(sc->sc_sensor[ADT_REM1_TEMP].desc, "Rem1 Temp.",
sizeof(sc->sc_sensor[ADT_REM1_TEMP].desc));
sc->sc_sensor[ADT_LOCAL_TEMP].type = SENSOR_TEMP;
strlcpy(sc->sc_sensor[ADT_LOCAL_TEMP].desc, "Int. Temp.",
sizeof(sc->sc_sensor[ADT_LOCAL_TEMP].desc));
sc->sc_sensor[ADT_REM2_TEMP].type = SENSOR_TEMP;
strlcpy(sc->sc_sensor[ADT_REM2_TEMP].desc, "Rem1 Temp.",
sizeof(sc->sc_sensor[ADT_REM2_TEMP].desc));
sc->sc_sensor[ADT_TACH1].type = SENSOR_FANRPM;
strlcpy(sc->sc_sensor[ADT_TACH1].desc, "TACH1",
sizeof(sc->sc_sensor[ADT_TACH1].desc));
sc->sc_sensor[ADT_TACH2].type = SENSOR_FANRPM;
strlcpy(sc->sc_sensor[ADT_TACH2].desc, "TACH1",
sizeof(sc->sc_sensor[ADT_TACH2].desc));
sc->sc_sensor[ADT_TACH3].type = SENSOR_FANRPM;
strlcpy(sc->sc_sensor[ADT_TACH3].desc, "TACH1",
sizeof(sc->sc_sensor[ADT_TACH3].desc));
sc->sc_sensor[ADT_TACH4].type = SENSOR_FANRPM;
strlcpy(sc->sc_sensor[ADT_TACH4].desc, "TACH1",
sizeof(sc->sc_sensor[ADT_TACH4].desc));
if (sensor_task_register(sc, adt_refresh, 5)) {
printf(", unable to register update task\n");
return;
}
for (i = 0; i < ADT_NUM_SENSORS; i++)
SENSOR_ADD(&sc->sc_sensor[i]);
printf("\n");
}
struct {
char sensor;
u_int8_t cmd;
} worklist[] = {
{ ADT_2_5V, ADT7460_2_5V },
{ ADT_VCCP1, ADT7460_VCCP1 },
{ ADT_REM1_TEMP, ADT7460_REM1_TEMP },
{ ADT_LOCAL_TEMP, ADT7460_LOCAL_TEMP },
{ ADT_REM2_TEMP, ADT7460_REM2_TEMP },
{ ADT_TACH1, ADT7460_TACH1L },
{ ADT_TACH2, ADT7460_TACH2L },
{ ADT_TACH3, ADT7460_TACH3L },
{ ADT_TACH4, ADT7460_TACH4L },
};
void
adt_refresh(void *arg)
{
struct adt_softc *sc = arg;
u_int8_t cmd, data, data2;
u_int16_t fan;
int i;
iic_acquire_bus(sc->sc_tag, 0);
for (i = 0; i < sizeof worklist / sizeof(worklist[0]); i++) {
cmd = worklist[i].cmd;
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
sc->sc_sensor[i].flags |= SENSOR_FINVALID;
continue;
}
sc->sc_sensor[i].flags &= ~SENSOR_FINVALID;
switch (worklist[i].sensor) {
case ADT_2_5V:
sc->sc_sensor[i].value = 2500000 * data / 192;
break;
case ADT_VCCP1:
sc->sc_sensor[i].value = 2700000 * data / 192;
break;
case ADT_LOCAL_TEMP:
case ADT_REM1_TEMP:
case ADT_REM2_TEMP:
if (data == 0x80)
sc->sc_sensor[i].flags |= SENSOR_FINVALID;
else
sc->sc_sensor[i].value =
(int8_t)data * 1000000 + 273150000;
break;
case ADT_TACH1:
case ADT_TACH2:
case ADT_TACH3:
case ADT_TACH4:
cmd = worklist[i].cmd + 1; /* TACHnH follows TACHnL */
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, &data2, sizeof data2, 0)) {
sc->sc_sensor[i].flags |= SENSOR_FINVALID;
continue;
}
fan = data + (data2 << 8);
if (fan == 0 || fan == 0xffff)
sc->sc_sensor[i].flags |= SENSOR_FINVALID;
else
sc->sc_sensor[i].value = (90000 * 60) / fan;
break;
default:
sc->sc_sensor[i].flags |= SENSOR_FINVALID;
break;
}
}
iic_release_bus(sc->sc_tag, 0);
}
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