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/* $OpenBSD: fintek.c,v 1.4 2006/12/24 01:26:20 deraadt Exp $ */
/*
* Copyright (c) 2006 Dale Rahn <drahn@openbsd.org>
*
* 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>
/* Sensors */
#define F_VCC 0
#define F_V1 1
#define F_V2 2
#define F_V3 3
#define F_TEMP1 4
#define F_TEMP2 5
#define F_FAN1 6
#define F_FAN2 7
#define F_NUM_SENSORS 8
struct fintek_softc {
struct device sc_dev;
i2c_tag_t sc_tag;
i2c_addr_t sc_addr;
struct sensor sc_sensor[F_NUM_SENSORS];
struct sensordev sc_sensordev;
};
int fintek_match(struct device *, void *, void *);
void fintek_attach(struct device *, struct device *, void *);
void fintek_refresh(void *);
int fintek_read_reg(struct fintek_softc *sc, u_int8_t cmd, u_int8_t *data,
size_t size);
int fintek_write_reg(struct fintek_softc *sc, u_int8_t cmd, u_int8_t *data,
size_t size);
void fintek_fullspeed(struct fintek_softc *sc);
struct cfattach fintek_ca = {
sizeof(struct fintek_softc), fintek_match, fintek_attach
};
struct cfdriver fintek_cd = {
NULL, "fintek", DV_DULL
};
#define FINTEK_CONFIG1 0x01
#define FINTEK_FAN1_LINEAR_MODE 0x10
#define FINTEK_FAN2_LINEAR_MODE 0x20
#define FINTEK_VOLT0 0x10
#define FINTEK_VOLT1 0x11
#define FINTEK_VOLT2 0x12
#define FINTEK_VOLT3 0x13
#define FINTEK_TEMP1 0x14
#define FINTEK_TEMP2 0x15
#define FINTEK_FAN1 0x16
#define FINTEK_FAN2 0x18
#define FINTEK_VERSION 0x5c
#define FINTEK_RSTCR 0x60
#define FINTEK_FAN1_MODE_MANUAL 0x30
#define FINTEK_FAN2_MODE_MANUAL 0xc0
#define FINTEK_PWM_DUTY1 0x76
#define FINTEK_PWM_DUTY2 0x86
/* Options passed via the 'flags' config keyword. */
#define FINTEK_OPTION_FULLSPEED 0x0001
int
fintek_match(struct device *parent, void *match, void *aux)
{
struct i2c_attach_args *ia = aux;
if (strcmp(ia->ia_name, "f75375") == 0)
return (1);
return (0);
}
int
fintek_read_reg(struct fintek_softc *sc, u_int8_t cmd, u_int8_t *data,
size_t size)
{
return iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, data, size, 0);
}
int
fintek_write_reg(struct fintek_softc *sc, u_int8_t cmd, u_int8_t *data,
size_t size)
{
return iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, data, size, 0);
}
void
fintek_attach(struct device *parent, struct device *self, void *aux)
{
struct fintek_softc *sc = (struct fintek_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 = FINTEK_VERSION;
if (fintek_read_reg(sc, cmd, &data, sizeof data))
goto failread;
printf(": F75375 rev %d.%d", data>> 4, data & 0xf);
/*
* It seems the fan in the Thecus n2100 doesn't provide a
* reliable fan count. As a result the automatic fan
* controlling mode that the chip comes up in after reset
* doesn't work reliably. So we have a flag to drive the fan
* at maximum voltage such that the box doesn't overheat.
*/
if (sc->sc_dev.dv_cfdata->cf_flags & FINTEK_OPTION_FULLSPEED)
fintek_fullspeed(sc);
iic_release_bus(sc->sc_tag, 0);
strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
sizeof(sc->sc_sensordev.xname));
sc->sc_sensor[F_VCC].type = SENSOR_VOLTS_DC;
strlcpy(sc->sc_sensor[F_VCC].desc, "Vcc",
sizeof(sc->sc_sensor[F_VCC].desc));
sc->sc_sensor[F_V1].type = SENSOR_VOLTS_DC;
sc->sc_sensor[F_V2].type = SENSOR_VOLTS_DC;
sc->sc_sensor[F_V3].type = SENSOR_VOLTS_DC;
sc->sc_sensor[F_TEMP1].type = SENSOR_TEMP;
sc->sc_sensor[F_TEMP2].type = SENSOR_TEMP;
sc->sc_sensor[F_FAN1].type = SENSOR_FANRPM;
sc->sc_sensor[F_FAN2].type = SENSOR_FANRPM;
if (sensor_task_register(sc, fintek_refresh, 5)) {
printf(", unable to register update task\n");
return;
}
for (i = 0; i < F_NUM_SENSORS; i++) {
sc->sc_sensor[i].flags &= ~SENSOR_FINVALID;
sensor_attach(&sc->sc_sensordev, &sc->sc_sensor[i]);
}
sensordev_install(&sc->sc_sensordev);
printf("\n");
return;
failread:
printf("unable to read reg %d\n", cmd);
iic_release_bus(sc->sc_tag, 0);
return;
}
struct {
char sensor;
u_int8_t cmd;
} fintek_worklist[] = {
{ F_VCC, FINTEK_VOLT0 },
{ F_V1, FINTEK_VOLT1 },
{ F_V2, FINTEK_VOLT2 },
{ F_V3, FINTEK_VOLT3 },
{ F_TEMP1, FINTEK_TEMP1 },
{ F_TEMP2, FINTEK_TEMP2 },
{ F_FAN1, FINTEK_FAN1 },
{ F_FAN2, FINTEK_FAN2 }
};
#define FINTEK_WORKLIST_SZ (sizeof(fintek_worklist) / sizeof(fintek_worklist[0]))
void
fintek_refresh(void *arg)
{
struct fintek_softc *sc = arg;
u_int8_t cmd, data, data2;
int i;
iic_acquire_bus(sc->sc_tag, 0);
for (i = 0; i < FINTEK_WORKLIST_SZ; i++){
cmd = fintek_worklist[i].cmd;
if (fintek_read_reg(sc, cmd, &data, sizeof data)) {
sc->sc_sensor[i].flags |= SENSOR_FINVALID;
continue;
}
sc->sc_sensor[i].flags &= ~SENSOR_FINVALID;
switch (fintek_worklist[i].sensor) {
case F_VCC:
sc->sc_sensor[i].value = data * 16000;
break;
case F_V1:
/* FALLTHROUGH */
case F_V2:
/* FALLTHROUGH */
case F_V3:
sc->sc_sensor[i].value = data * 8000;
break;
case F_TEMP1:
/* FALLTHROUGH */
case F_TEMP2:
sc->sc_sensor[i].value = 273150000 + data * 1000000;
break;
case F_FAN1:
/* FALLTHROUGH */
case F_FAN2:
/* FANx LSB follows FANx MSB */
cmd = fintek_worklist[i].cmd + 1;
if (fintek_read_reg(sc, cmd, &data2, sizeof data2)) {
sc->sc_sensor[i].flags |= SENSOR_FINVALID;
continue;
}
if ((data == 0xff && data2 == 0xff) ||
(data == 0 && data2 == 0))
sc->sc_sensor[i].value = 0;
else
sc->sc_sensor[i].value = 1500000 /
(data << 8 | data2);
break;
default:
sc->sc_sensor[i].flags |= SENSOR_FINVALID;
break;
}
}
iic_release_bus(sc->sc_tag, 0);
}
void
fintek_fullspeed(struct fintek_softc *sc)
{
u_int8_t data;
data = FINTEK_FAN1_LINEAR_MODE | FINTEK_FAN2_LINEAR_MODE;
fintek_write_reg(sc, FINTEK_CONFIG1, &data, sizeof data);
data = FINTEK_FAN1_MODE_MANUAL | FINTEK_FAN2_MODE_MANUAL;
fintek_write_reg(sc, FINTEK_RSTCR, &data, sizeof data);
data = 0xff; /* Maximum voltage */
fintek_write_reg(sc, FINTEK_PWM_DUTY1, &data, sizeof data);
fintek_write_reg(sc, FINTEK_PWM_DUTY2, &data, sizeof data);
}
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