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/* $OpenBSD: w83795g.c,v 1.2 2022/04/06 18:59:28 naddy Exp $ */
/*
* Copyright (c) 2011 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>
/* Nuvoton W83795G Hardware Monitor */
#define NVT_BANKSELECT 0x00
#define NVT_CONFIG 0x01
#define NVT_CONFIG_48 0x04
#define NVT_VOLT_CTRL1 0x02
#define NVT_VOLT_CTRL2 0x03
#define NVT_TEMP_CTRL1 0x04
#define NVT_TEMP_CTRL2 0x05
#define NVT_FANIN_CTRL1 0x06
#define NVT_FANIN_CTRL2 0x07
#define NVT_VSEN1 0x10
#define NVT_3VDD 0x1c
#define NVT_3VSB 0x1d
#define NVT_VBAT 0x1e
#define NVT_TR5 0x1f
#define NVT_TR6 0x20
#define NVT_TD1 0x21
#define NVT_TD2 0x22
#define NVT_TD3 0x23
#define NVT_TD4 0x24
#define NVT_FANIN1_COUNT 0x2e
#define NVT_VRLSB 0x3c
/* Voltage */
#define NVT_NUM_VOLTS 15
static const char *nvt_volt_desc[NVT_NUM_VOLTS] = {
"", "", "", "", "", "", "", "", "", "", "",
"VTT", "3VDD", "3VSB", "VBat"
};
/* Temperature */
#define NVT_NUM_TEMPS 6
#define NVT_NUM_TR 2
#define NVT_NUM_TD 4
/* Fan */
#define NVT_NUM_FANS 14
#define NVT_NUM_SENSORS (NVT_NUM_VOLTS + NVT_NUM_TEMPS + NVT_NUM_FANS)
struct nvt_softc {
struct device sc_dev;
i2c_tag_t sc_tag;
i2c_addr_t sc_addr;
uint16_t sc_vctrl;
uint16_t sc_tctrl1, sc_tctrl2;
uint16_t sc_fctrl;
struct ksensor sc_sensors[NVT_NUM_SENSORS];
struct ksensordev sc_sensordev;
};
int nvt_match(struct device *, void *, void *);
void nvt_attach(struct device *, struct device *, void *);
void nvt_refresh(void *);
void nvt_refresh_volts(struct nvt_softc *);
void nvt_refresh_temps(struct nvt_softc *);
void nvt_refresh_fans(struct nvt_softc *);
uint8_t nvt_readreg(struct nvt_softc *, uint8_t);
void nvt_writereg(struct nvt_softc *, uint8_t, uint8_t);
const struct cfattach nvt_ca = {
sizeof(struct nvt_softc), nvt_match, nvt_attach
};
struct cfdriver nvt_cd = {
NULL, "nvt", DV_DULL
};
int
nvt_match(struct device *parent, void *match, void *aux)
{
struct i2c_attach_args *ia = aux;
if (strcmp(ia->ia_name, "w83795g") == 0)
return (1);
return (0);
}
void
nvt_attach(struct device *parent, struct device *self, void *aux)
{
struct nvt_softc *sc = (struct nvt_softc *)self;
struct i2c_attach_args *ia = aux;
uint8_t cfg, vctrl1, vctrl2;
uint8_t tctrl1, tctrl2, fctrl1, fctrl2;
int i, j;
sc->sc_tag = ia->ia_tag;
sc->sc_addr = ia->ia_addr;
cfg = nvt_readreg(sc, NVT_CONFIG);
if (cfg & NVT_CONFIG_48)
printf(": W83795ADG");
else
printf(": W83795G");
vctrl1 = nvt_readreg(sc, NVT_VOLT_CTRL1);
vctrl2 = nvt_readreg(sc, NVT_VOLT_CTRL2);
tctrl1 = nvt_readreg(sc, NVT_TEMP_CTRL1);
tctrl2 = nvt_readreg(sc, NVT_TEMP_CTRL2);
fctrl1 = nvt_readreg(sc, NVT_FANIN_CTRL1);
fctrl2 = nvt_readreg(sc, NVT_FANIN_CTRL2);
sc->sc_vctrl = vctrl2 << 8 | vctrl1;
sc->sc_tctrl1 = tctrl1;
sc->sc_tctrl2 = tctrl2;
sc->sc_fctrl = fctrl2 << 8 | fctrl1;
strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
sizeof(sc->sc_sensordev.xname));
for (i = 0; i < NVT_NUM_VOLTS; i++) {
strlcpy(sc->sc_sensors[i].desc, nvt_volt_desc[i],
sizeof(sc->sc_sensors[i].desc));
sc->sc_sensors[i].type = SENSOR_VOLTS_DC;
}
for (j = i + NVT_NUM_TEMPS; i < j; i++)
sc->sc_sensors[i].type = SENSOR_TEMP;
for (j = i + NVT_NUM_FANS; i < j; i++)
sc->sc_sensors[i].type = SENSOR_FANRPM;
for (i = 0; i < NVT_NUM_VOLTS + NVT_NUM_TEMPS + NVT_NUM_FANS; i++)
sensor_attach(&sc->sc_sensordev, &sc->sc_sensors[i]);
if (sensor_task_register(sc, nvt_refresh, 5) == NULL) {
printf(", unable to register update task\n");
return;
}
sensordev_install(&sc->sc_sensordev);
printf("\n");
}
void
nvt_refresh(void *arg)
{
struct nvt_softc *sc = arg;
uint8_t bsr;
iic_acquire_bus(sc->sc_tag, 0);
bsr = nvt_readreg(sc, NVT_BANKSELECT);
if ((bsr & 0x07) != 0x00)
nvt_writereg(sc, NVT_BANKSELECT, bsr & 0xf8);
nvt_refresh_volts(sc);
nvt_refresh_temps(sc);
nvt_refresh_fans(sc);
if ((bsr & 0x07) != 0x00)
nvt_writereg(sc, NVT_BANKSELECT, bsr);
iic_release_bus(sc->sc_tag, 0);
}
void
nvt_refresh_volts(struct nvt_softc *sc)
{
struct ksensor *s = &sc->sc_sensors[0];
uint8_t vrlsb, data;
int i, reg;
for (i = 0; i < NVT_NUM_VOLTS; i++) {
if ((sc->sc_vctrl & (1 << i)) == 0) {
s[i].flags |= SENSOR_FINVALID;
s[i].value = 0;
continue;
}
reg = NVT_VSEN1 + i;
data = nvt_readreg(sc, reg);
vrlsb = nvt_readreg(sc, NVT_VRLSB);
if (reg != NVT_3VDD && reg != NVT_3VSB && reg != NVT_VBAT)
s[i].value = 10000000 - ((data << 3) | (vrlsb >> 6)) * 2000;
else
s[i].value = 10000000 - ((data << 3) | (vrlsb >> 6)) * 6000;
s[i].flags &= ~SENSOR_FINVALID;
}
}
void
nvt_refresh_temps(struct nvt_softc *sc)
{
struct ksensor *s = &sc->sc_sensors[NVT_NUM_VOLTS];
uint8_t vrlsb;
int8_t data;
int i;
for (i = 0; i < NVT_NUM_TEMPS; i++) {
if (i < NVT_NUM_TR
&& (sc->sc_tctrl1 & (1 << (2 * i))) == 0) {
s[i].flags |= SENSOR_FINVALID;
s[i].value = 0;
continue;
}
if (i >= NVT_NUM_TR
&& (sc->sc_tctrl2 & (1 << (2 * (i - NVT_NUM_TR)))) == 0) {
s[i].flags |= SENSOR_FINVALID;
s[i].value = 0;
continue;
}
data = nvt_readreg(sc, NVT_TR5 + i);
vrlsb = nvt_readreg(sc, NVT_VRLSB);
if (data == -128 && (vrlsb >> 6) == 0) {
s[i].flags |= SENSOR_FINVALID;
s[i].value = 0;
continue;
}
s[i].value = data * 1000000 + (vrlsb >> 6) * 250000;
s[i].value += 273150000;
s[i].flags &= ~SENSOR_FINVALID;
}
}
void
nvt_refresh_fans(struct nvt_softc *sc)
{
struct ksensor *s = &sc->sc_sensors[NVT_NUM_VOLTS + NVT_NUM_TEMPS];
uint8_t data, vrlsb;
uint16_t count;
int i;
for (i = 0; i < NVT_NUM_FANS; i++) {
if ((sc->sc_fctrl & (1 << i)) == 0) {
s[i].flags |= SENSOR_FINVALID;
s[i].value = 0;
continue;
}
data = nvt_readreg(sc, NVT_FANIN1_COUNT + i);
vrlsb = nvt_readreg(sc, NVT_VRLSB);
count = (data << 4) + (vrlsb >> 4);
if (count == 0) {
s[i].flags |= SENSOR_FINVALID;
s[i].value = 0;
continue;
}
s[i].value = 1350000 / (count * 2);
s[i].flags &= ~SENSOR_FINVALID;
}
}
uint8_t
nvt_readreg(struct nvt_softc *sc, uint8_t reg)
{
uint8_t data;
iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,
sc->sc_addr, ®, sizeof reg, &data, sizeof data, 0);
return data;
}
void
nvt_writereg(struct nvt_softc *sc, uint8_t reg, uint8_t data)
{
iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP,
sc->sc_addr, ®, sizeof reg, &data, sizeof data, 0);
}
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