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/* $OpenBSD: gl518sm.c,v 1.4 2006/12/23 17:46:39 deraadt Exp $ */
/*
* Copyright (c) 2006 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>
/* GL518SM registers */
#define GL518SM_CHIPID 0x00
#define GL518SM_REVISION 0x01
#define GL518SM_VENDORID 0x02
#define GL518SM_CONFIG 0x03
#define GL518SM_CONFIG_START 0x40
#define GL518SM_CONFIG_CLEARST 0x20
#define GL518SM_CONFIG_NOFAN2 0x10
#define GL518SM_TEMP 0x04
#define GL518SM_TEMP_OVER 0x05
#define GL518SM_TEMP_HYST 0x06
#define GL518SM_FAN_COUNT 0x07
#define GL518SM_FAN_LIMIT 0x08
#define GL518SM_VIN1_LIMIT 0x09
#define GL518SM_VIN2_LIMIT 0x0a
#define GL518SM_VIN3_LIMIT 0x0b
#define GL518SM_VDD_LIMIT 0x0c
#define GL518SM_VOLTMETER 0x0d
#define GL518SM_MISC 0x0f
#define GL518SM_ALARM 0x10
#define GL518SM_MASK 0x11
#define GL518SM_INTSTAT 0x12
/* Sensors */
#define GLENV_VIN3 0
#define GLENV_TEMP 1
#define GLENV_FAN1 2
#define GLENV_FAN2 3
#define GLENV_NUM_SENSORS 4
struct glenv_softc {
struct device sc_dev;
i2c_tag_t sc_tag;
i2c_addr_t sc_addr;
struct sensor sc_sensor[GLENV_NUM_SENSORS];
struct sensordev sc_sensordev;
int sc_fan1_div, sc_fan2_div;
};
int glenv_match(struct device *, void *, void *);
void glenv_attach(struct device *, struct device *, void *);
void glenv_refresh(void *);
struct cfattach glenv_ca = {
sizeof(struct glenv_softc), glenv_match, glenv_attach
};
struct cfdriver glenv_cd = {
NULL, "glenv", DV_DULL
};
int
glenv_match(struct device *parent, void *match, void *aux)
{
struct i2c_attach_args *ia = aux;
if (strcmp(ia->ia_name, "gl518sm") == 0)
return (1);
return (0);
}
void
glenv_attach(struct device *parent, struct device *self, void *aux)
{
struct glenv_softc *sc = (struct glenv_softc *)self;
struct i2c_attach_args *ia = aux;
u_int8_t cmd, data;
int i;
sc->sc_tag = ia->ia_tag;
sc->sc_addr = ia->ia_addr;
iic_acquire_bus(sc->sc_tag, 0);
cmd = GL518SM_REVISION;
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 read revision register\n");
return;
}
printf(": GL518SM rev 0x%02x", data);
cmd = GL518SM_MISC;
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 read misc register\n");
return;
}
sc->sc_fan1_div = 1 << ((data >> 6) & 0x03);
sc->sc_fan2_div = 1 << ((data >> 4) & 0x03);
cmd = GL518SM_CONFIG;
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 read configuration register\n");
return;
}
if (data & GL518SM_CONFIG_NOFAN2)
sc->sc_fan2_div = 0;
/* Start monitoring and clear interrupt status. */
data = (data | GL518SM_CONFIG_START | GL518SM_CONFIG_CLEARST);
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 write configuration register\n");
return;
}
iic_release_bus(sc->sc_tag, 0);
/* Initialize sensor data. */
strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
sizeof(sc->sc_sensordev.xname));
sc->sc_sensor[GLENV_VIN3].type = SENSOR_VOLTS_DC;
sc->sc_sensor[GLENV_TEMP].type = SENSOR_TEMP;
sc->sc_sensor[GLENV_FAN1].type = SENSOR_FANRPM;
sc->sc_sensor[GLENV_FAN2].type = SENSOR_FANRPM;
if (sc->sc_fan2_div == -1)
sc->sc_sensor[GLENV_FAN2].flags |= SENSOR_FINVALID;
if (sensor_task_register(sc, glenv_refresh, 5)) {
printf(", unable to register update task\n");
return;
}
for (i = 0; i < GLENV_NUM_SENSORS; i++)
sensor_attach(&sc->sc_sensordev, &sc->sc_sensor[i]);
sensordev_install(&sc->sc_sensordev);
printf("\n");
}
void
glenv_refresh(void *arg)
{
struct glenv_softc *sc = arg;
u_int8_t cmd, data, data2[2];
u_int tmp;
iic_acquire_bus(sc->sc_tag, 0);
cmd = GL518SM_VOLTMETER;
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
sc->sc_sensor[GLENV_VIN3].flags |= SENSOR_FINVALID;
} else {
sc->sc_sensor[GLENV_VIN3].flags &= ~SENSOR_FINVALID;
sc->sc_sensor[GLENV_VIN3].value = data * 19000;
}
cmd = GL518SM_TEMP;
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, &data, sizeof data, 0)) {
sc->sc_sensor[GLENV_TEMP].flags |= SENSOR_FINVALID;
} else {
sc->sc_sensor[GLENV_TEMP].flags &= ~SENSOR_FINVALID;
sc->sc_sensor[GLENV_TEMP].value =
(data - 119) * 1000000 + 273150000;
}
cmd = GL518SM_FAN_COUNT;
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, &data2, sizeof data2, 0)) {
sc->sc_sensor[GLENV_FAN1].flags |= SENSOR_FINVALID;
sc->sc_sensor[GLENV_FAN2].flags |= SENSOR_FINVALID;
} else {
sc->sc_sensor[GLENV_FAN1].flags &= ~SENSOR_FINVALID;
tmp = data2[0] * sc->sc_fan1_div * 2;
if (tmp == 0)
sc->sc_sensor[GLENV_FAN1].flags |= SENSOR_FINVALID;
else
sc->sc_sensor[GLENV_FAN1].value = 960000 / tmp;
sc->sc_sensor[GLENV_FAN2].flags &= ~SENSOR_FINVALID;
tmp = data2[1] * sc->sc_fan2_div * 2;
if (tmp == 0)
sc->sc_sensor[GLENV_FAN2].flags |= SENSOR_FINVALID;
else
sc->sc_sensor[GLENV_FAN2].value = 960000 / tmp;
}
iic_release_bus(sc->sc_tag, 0);
}
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