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/* $OpenBSD: fcu.c,v 1.8 2022/04/06 18:59:28 naddy 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>
/* FCU registers */
#define FCU_FAN_FAIL 0x0b /* fans states in bits 0<1-6>7 */
#define FCU_FAN_ACTIVE 0x0d
#define FCU_FANREAD(x) 0x11 + (x)*2
#define FCU_FANSET(x) 0x10 + (x)*2
#define FCU_PWM_FAIL 0x2b
#define FCU_PWM_ACTIVE 0x2d
#define FCU_PWMREAD(x) 0x30 + (x)*2
/* Sensors */
#define FCU_RPM1 0
#define FCU_RPM2 1
#define FCU_RPM3 2
#define FCU_RPM4 3
#define FCU_RPM5 4
#define FCU_RPM6 5
#define FCU_FANS 6
#define FCU_PWM1 6
#define FCU_PWM2 7
#define FCU_PWMS 2
#define FCU_NUM_SENSORS 8
struct fcu_softc {
struct device sc_dev;
i2c_tag_t sc_tag;
i2c_addr_t sc_addr;
struct ksensor sc_sensor[FCU_NUM_SENSORS];
struct ksensordev sc_sensordev;
};
int fcu_match(struct device *, void *, void *);
void fcu_attach(struct device *, struct device *, void *);
void fcu_refresh(void *);
const struct cfattach fcu_ca = {
sizeof(struct fcu_softc), fcu_match, fcu_attach
};
struct cfdriver fcu_cd = {
NULL, "fcu", DV_DULL
};
int
fcu_match(struct device *parent, void *match, void *aux)
{
struct i2c_attach_args *ia = aux;
if (strcmp(ia->ia_name, "fcu") == 0)
return (1);
return (0);
}
void
fcu_attach(struct device *parent, struct device *self, void *aux)
{
struct fcu_softc *sc = (struct fcu_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. */
strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
sizeof(sc->sc_sensordev.xname));
for (i = 0; i < FCU_FANS; i++)
sc->sc_sensor[i].type = SENSOR_FANRPM;
for (i = 0; i < FCU_PWMS; i++) {
sc->sc_sensor[FCU_PWM1 + i].type = SENSOR_PERCENT;
strlcpy(sc->sc_sensor[FCU_PWM1 + i].desc, "PWM",
sizeof(sc->sc_sensor[FCU_PWM1 + i].desc));
}
if (sensor_task_register(sc, fcu_refresh, 5) == NULL) {
printf(", unable to register update task\n");
return;
}
for (i = 0; i < FCU_NUM_SENSORS; i++)
sensor_attach(&sc->sc_sensordev, &sc->sc_sensor[i]);
sensordev_install(&sc->sc_sensordev);
printf("\n");
}
void
fcu_refresh(void *arg)
{
struct fcu_softc *sc = arg;
u_int8_t cmd, fail, fan[2], active;
int i;
iic_acquire_bus(sc->sc_tag, 0);
cmd = FCU_FAN_FAIL;
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, &fail, sizeof fail, 0))
goto abort;
cmd = FCU_FAN_ACTIVE;
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, &active, sizeof active, 0))
goto abort;
fail &= active;
for (i = 0; i < FCU_FANS; i++) {
if (fail & (1 << (i + 1)))
sc->sc_sensor[i].flags |= SENSOR_FINVALID;
else
sc->sc_sensor[i].flags &= ~SENSOR_FINVALID;
}
cmd = FCU_PWM_FAIL;
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, &fail, sizeof fail, 0))
goto abort;
cmd = FCU_PWM_ACTIVE;
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, &active, sizeof active, 0))
goto abort;
fail &= active;
for (i = 0; i < FCU_PWMS; i++) {
if (fail & (1 << (i + 1)))
sc->sc_sensor[FCU_PWMS + i].flags |= SENSOR_FINVALID;
else
sc->sc_sensor[FCU_PWMS + i].flags &= ~SENSOR_FINVALID;
}
for (i = 0; i < FCU_FANS; i++) {
cmd = FCU_FANREAD(i + 1);
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, &fan, sizeof fan, 0)) {
sc->sc_sensor[FCU_RPM1 + i].flags |= SENSOR_FINVALID;
continue;
}
sc->sc_sensor[FCU_RPM1 + i].value = (fan[0] << 5) | (fan[1] >> 3);
}
for (i = 0; i < FCU_PWMS; i++) {
cmd = FCU_PWMREAD(i + 1);
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, &cmd, sizeof cmd, &fan, sizeof fan, 0)) {
sc->sc_sensor[FCU_PWM1 + i].flags |= SENSOR_FINVALID;
continue;
}
sc->sc_sensor[FCU_PWM1 + i].value = (fan[0] * 100 * 1000) / 255;
}
abort:
iic_release_bus(sc->sc_tag, 0);
}
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