/* $NetBSD: pcf8591_envctrl.c,v 1.19 2021/01/27 02:20:03 thorpej Exp $ */
/* $OpenBSD: pcf8591_envctrl.c,v 1.6 2007/10/25 21:17:20 kettenis Exp $ */
/*
* Copyright (c) 2006 Damien Miller <
[email protected]>
* Copyright (c) 2007 Mark Kettenis <
[email protected]>
*
* 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pcf8591_envctrl.c,v 1.19 2021/01/27 02:20:03 thorpej Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <dev/sysmon/sysmonvar.h>
#include <dev/sysmon/sysmon_taskq.h>
#include <machine/autoconf.h>
#include <dev/ofw/openfirm.h>
#include <dev/i2c/i2cvar.h>
#ifdef ECADC_DEBUG
#define DPRINTF printf
#else
#define DPRINTF if (0) printf
#endif
/* Translation tables contain 254 entries */
#define XLATE_SIZE 256
#define XLATE_MAX (XLATE_SIZE - 2)
#define PCF8591_CHANNELS 4
#define PCF8591_CTRL_CH0 0x00
#define PCF8591_CTRL_CH1 0x01
#define PCF8591_CTRL_CH2 0x02
#define PCF8591_CTRL_CH3 0x03
#define PCF8591_CTRL_AUTOINC 0x04
#define PCF8591_CTRL_OSCILLATOR 0x40
#define PCF8591_TEMP_SENS 0x00
#define PCF8591_SYS_FAN_CTRL 0x01
struct ecadc_channel {
u_int chan_num;
u_int chan_type;
envsys_data_t chan_sensor;
u_char *chan_xlate;
int64_t chan_factor;
int64_t chan_min;
int64_t chan_warn;
int64_t chan_crit;
u_int8_t chan_speed;
};
struct ecadc_softc {
device_t sc_dev;
i2c_tag_t sc_tag;
i2c_addr_t sc_addr;
u_char sc_ps_xlate[XLATE_SIZE];
u_char sc_cpu_xlate[XLATE_SIZE];
u_char sc_cpu_fan_spd[XLATE_SIZE];
u_int sc_nchan;
struct ecadc_channel sc_channels[PCF8591_CHANNELS];
struct sysmon_envsys *sc_sme;
int sc_hastimer;
callout_t sc_timer;
};
static int ecadc_match(device_t, cfdata_t, void *);
static void ecadc_attach(device_t, device_t, void *);
static int ecadc_detach(device_t, int);
static void ecadc_refresh(struct sysmon_envsys *, envsys_data_t *);
static void ecadc_get_limits(struct sysmon_envsys *, envsys_data_t *,
sysmon_envsys_lim_t *, u_int32_t *);
static int ecadc_set_fan_speed(struct ecadc_softc *, u_int8_t, u_int8_t);
static void ecadc_timeout(void *);
static void ecadc_fan_adjust(void *);
CFATTACH_DECL3_NEW(ecadc, sizeof(struct ecadc_softc),
ecadc_match, ecadc_attach, ecadc_detach, NULL, NULL, NULL,
DVF_DETACH_SHUTDOWN);
static const struct device_compatible_entry compat_data[] = {
{ .compat = "ecadc" },
DEVICE_COMPAT_EOL
};
static int
ecadc_match(device_t parent, cfdata_t cf, void *aux)
{
struct i2c_attach_args *ia = aux;
int match_result;
if (iic_use_direct_match(ia, cf, compat_data, &match_result))
return match_result;
/* This driver is direct-config only. */
return 0;
}
static void
ecadc_attach(device_t parent, device_t self, void *aux)
{
struct i2c_attach_args *ia = aux;
struct ecadc_softc *sc = device_private(self);
u_char term[256];
u_char *cp, *desc;
int64_t minv, warnv, crit, num, den;
u_int8_t junk[PCF8591_CHANNELS + 1];
envsys_data_t *sensor;
int len, error, addr, chan, node = (int)ia->ia_cookie;
u_int i;
sc->sc_dev = self;
sc->sc_nchan = 0;
sc->sc_hastimer = 0;
DPRINTF("\n");
if ((len = OF_getprop(node, "thermisters", term,
sizeof(term))) < 0) {
aprint_error(": couldn't find \"thermisters\" property\n");
return;
}
if (OF_getprop(node, "cpu-temp-factors", &sc->sc_cpu_xlate[2],
XLATE_MAX) < 0) {
aprint_error(": couldn't find \"cpu-temp-factors\" property\n");
return;
}
sc->sc_cpu_xlate[0] = sc->sc_cpu_xlate[1] = sc->sc_cpu_xlate[2];
/* Only the Sun Enterprise 450 has these. */
OF_getprop(node, "ps-temp-factors", &sc->sc_ps_xlate[2], XLATE_MAX);
sc->sc_ps_xlate[0] = sc->sc_ps_xlate[1] = sc->sc_ps_xlate[2];
cp = term;
while (cp < term + len) {
addr = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4;
chan = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4;
minv = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4;
warnv = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4;
crit = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4;
num = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4;
den = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4;
desc = cp;
while (cp < term + len && *cp++);
if (addr != (ia->ia_addr << 1))
continue;
if (num == 0 || den == 0)
num = den = 1;
sc->sc_channels[sc->sc_nchan].chan_num = chan;
sc->sc_channels[sc->sc_nchan].chan_type = PCF8591_TEMP_SENS;
sensor = &sc->sc_channels[sc->sc_nchan].chan_sensor;
sensor->units = ENVSYS_STEMP;
sensor->flags |= ENVSYS_FMONLIMITS;
sensor->state = ENVSYS_SINVALID;
strlcpy(sensor->desc, desc, sizeof(sensor->desc));
if (strncmp(desc, "CPU", 3) == 0) {
sc->sc_channels[sc->sc_nchan].chan_xlate =
sc->sc_cpu_xlate;
DPRINTF("%s: "
"added %s sensor (chan %d) with cpu_xlate\n",
device_xname(sc->sc_dev), desc, chan);
} else if (strncmp(desc, "PS", 2) == 0) {
sc->sc_channels[sc->sc_nchan].chan_xlate =
sc->sc_ps_xlate;
DPRINTF("%s: "
"added %s sensor (chan %d) with ps_xlate\n",
device_xname(sc->sc_dev), desc, chan);
} else {
sc->sc_channels[sc->sc_nchan].chan_factor =
(1000000 * num) / den;
DPRINTF("%s: "
"added %s sensor (chan %d) without xlate\n",
device_xname(sc->sc_dev), desc, chan);
}
sc->sc_channels[sc->sc_nchan].chan_min =
273150000 + 1000000 * minv;
sc->sc_channels[sc->sc_nchan].chan_warn =
273150000 + 1000000 * warnv;
sc->sc_channels[sc->sc_nchan].chan_crit =
273150000 + 1000000 * crit;
sc->sc_nchan++;
}
sc->sc_tag = ia->ia_tag;
sc->sc_addr = ia->ia_addr;
iic_acquire_bus(sc->sc_tag, 0);
/* Try a read now, so we can fail if this component isn't present */
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr,
NULL, 0, junk, sc->sc_nchan + 1, 0)) {
aprint_normal(": read failed\n");
iic_release_bus(sc->sc_tag, 0);
return;
}
iic_release_bus(sc->sc_tag, 0);
/*
* Fan speed changing information is missing from OFW
* The E250 CPU fan is connected to the sensor at addr 0x4a, channel 1
*/
if (ia->ia_addr == 0x4a && !strcmp(machine_model, "SUNW,Ultra-250") &&
OF_getprop(node, "cpu-fan-speeds", &sc->sc_cpu_fan_spd,
XLATE_MAX) > 0) {
sc->sc_channels[sc->sc_nchan].chan_num = 1;
sc->sc_channels[sc->sc_nchan].chan_type = PCF8591_SYS_FAN_CTRL;
sensor = &sc->sc_channels[sc->sc_nchan].chan_sensor;
sensor->units = ENVSYS_INTEGER;
sensor->flags = ENVSYS_FMONNOTSUPP;
sensor->state = ENVSYS_SINVALID;
strlcpy(sensor->desc, "SYSFAN", sizeof(sensor->desc));
sc->sc_channels[sc->sc_nchan].chan_xlate = sc->sc_cpu_fan_spd;
DPRINTF("%s: "
"added CPUFAN sensor (chan %d) with cpu-fan xlate\n",
device_xname(sc->sc_dev),
sc->sc_channels[sc->sc_nchan].chan_num);
/* Set the fan to medium speed */
sc->sc_channels[sc->sc_nchan].chan_speed =
(sc->sc_cpu_fan_spd[0]+sc->sc_cpu_fan_spd[XLATE_MAX])/2;
ecadc_set_fan_speed(sc, sc->sc_channels[sc->sc_nchan].chan_num,
sc->sc_channels[sc->sc_nchan].chan_speed);
sc->sc_nchan++;
sc->sc_hastimer = 1;
}
/* Hook us into the sysmon_envsys subsystem */
sc->sc_sme = sysmon_envsys_create();
sc->sc_sme->sme_name = device_xname(self);
sc->sc_sme->sme_cookie = sc;
sc->sc_sme->sme_refresh = ecadc_refresh;
sc->sc_sme->sme_get_limits = ecadc_get_limits;
/* Initialize sensor data. */
for (i = 0; i < sc->sc_nchan; i++)
sysmon_envsys_sensor_attach(sc->sc_sme,
&sc->sc_channels[i].chan_sensor);
error = sysmon_envsys_register(sc->sc_sme);
if (error) {
aprint_error_dev(self, "error %d registering with sysmon\n",
error);
sysmon_envsys_destroy(sc->sc_sme);
sc->sc_sme = NULL;
return;
}
if (sc->sc_hastimer) {
callout_init(&sc->sc_timer, CALLOUT_MPSAFE);
callout_reset(&sc->sc_timer, hz*20, ecadc_timeout, sc);
}
aprint_naive(": Temp Sensors\n");
aprint_normal(": %s Temp Sensors (%d channels)\n", ia->ia_name,
sc->sc_nchan);
}
static int
ecadc_detach(device_t self, int flags)
{
struct ecadc_softc *sc = device_private(self);
int c, i;
if (sc->sc_hastimer) {
callout_halt(&sc->sc_timer, NULL);
callout_destroy(&sc->sc_timer);
}
if (sc->sc_sme != NULL)
sysmon_envsys_unregister(sc->sc_sme);
for (i = 0; i < sc->sc_nchan; i++) {
struct ecadc_channel *chp = &sc->sc_channels[i];
if (chp->chan_type == PCF8591_SYS_FAN_CTRL) {
/* Loop in case the bus is busy */
for (c = 0; c < 5; c++) {
chp->chan_speed = sc->sc_cpu_fan_spd[0];
if (!ecadc_set_fan_speed(sc, chp->chan_num,
chp->chan_speed))
return 0;
delay(10000);
}
printf("%s: cannot set fan speed (chan %d)\n",
device_xname(sc->sc_dev), chp->chan_num);
}
}
return 0;
}
static void
ecadc_refresh(struct sysmon_envsys *sme, envsys_data_t *sensor)
{
struct ecadc_softc *sc = sme->sme_cookie;
u_int i;
u_int8_t data[PCF8591_CHANNELS + 1];
u_int8_t ctrl = PCF8591_CTRL_CH0 | PCF8591_CTRL_AUTOINC |
PCF8591_CTRL_OSCILLATOR;
if (iic_acquire_bus(sc->sc_tag, 0))
return;
if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr,
&ctrl, 1, NULL, 0, 0)) {
iic_release_bus(sc->sc_tag, 0);
return;
}
/*
* Each data byte that we read is the result of the previous request,
* so read num_channels + 1 and update envsys values from chan + 1.
*/
if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr,
NULL, 0, data, PCF8591_CHANNELS + 1, 0)) {
iic_release_bus(sc->sc_tag, 0);
return;
}
iic_release_bus(sc->sc_tag, 0);
/* Temperature with/without translation or relative (ADC value) */
for (i = 0; i < sc->sc_nchan; i++) {
struct ecadc_channel *chp = &sc->sc_channels[i];
if (chp->chan_type == PCF8591_TEMP_SENS) {
/* Encode the raw value to use for the fan control */
if (chp->chan_xlate) {
int32_t temp;
temp = 273150000 + 1000000 *
chp->chan_xlate[data[1 + chp->chan_num]];
temp &= ~0xff;
temp += data[1 + chp->chan_num];
chp->chan_sensor.value_cur = temp;
DPRINTF("%s: xlate %s sensor = %d"
" (0x%x > 0x%x)\n",
device_xname(sc->sc_dev),
chp->chan_sensor.desc, temp,
data[1 + chp->chan_num],
chp->chan_xlate[data[1 + chp->chan_num]]);
} else {
chp->chan_sensor.value_cur = 273150000 +
chp->chan_factor * data[1 + chp->chan_num];
DPRINTF("%s: read %s sensor = %d (0x%x)\n",
device_xname(sc->sc_dev),
chp->chan_sensor.desc,
chp->chan_sensor.value_cur,
data[1 + chp->chan_num]);
}
chp->chan_sensor.flags |= ENVSYS_FMONLIMITS;
}
if (chp->chan_type == PCF8591_SYS_FAN_CTRL)
chp->chan_sensor.value_cur = data[1 + chp->chan_num];
chp->chan_sensor.state = ENVSYS_SVALID;
}
}
static void
ecadc_get_limits(struct sysmon_envsys *sme, envsys_data_t *edata,
sysmon_envsys_lim_t *limits, u_int32_t *props)
{
struct ecadc_softc *sc = sme->sme_cookie;
int i;
for (i = 0; i < sc->sc_nchan; i++) {
if (edata != &sc->sc_channels[i].chan_sensor)
continue;
if (sc->sc_channels[i].chan_type == PCF8591_TEMP_SENS) {
*props |= PROP_WARNMIN|PROP_WARNMAX|PROP_CRITMAX;
limits->sel_warnmin = sc->sc_channels[i].chan_min;
limits->sel_warnmax = sc->sc_channels[i].chan_warn;
limits->sel_critmax = sc->sc_channels[i].chan_crit;
}
return;
}
}
static void
ecadc_timeout(void *v)
{
struct ecadc_softc *sc = v;
sysmon_task_queue_sched(0, ecadc_fan_adjust, sc);
callout_reset(&sc->sc_timer, hz*60, ecadc_timeout, sc);
}
static bool
is_cpu_temp(const envsys_data_t *edata)
{
if (edata->units != ENVSYS_STEMP)
return false;
return strncmp(edata->desc, "CPU", 3) == 0;
}
static bool
is_high_temp(const envsys_data_t *edata)
{
if (edata->units != ENVSYS_INDICATOR)
return false;
return strcmp(edata->desc, "high_temp") == 0;
}
static bool
is_fan_fail(const envsys_data_t *edata)
{
if (edata->units != ENVSYS_INDICATOR)
return false;
return strcmp(edata->desc, "fan_fail") == 0;
}
static int
ecadc_set_fan_speed(struct ecadc_softc *sc, u_int8_t chan, u_int8_t val)
{
u_int8_t ctrl = PCF8591_CTRL_AUTOINC | PCF8591_CTRL_OSCILLATOR;
int ret;
ctrl |= chan;
ret = iic_acquire_bus(sc->sc_tag, 0);
if (ret) {
printf("%s: error acquiring i2c bus (ch %d)\n",
device_xname(sc->sc_dev), chan);
return ret;
}
ret = iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr,
&ctrl, 1, &val, 1, 0);
if (ret)
printf("%s: error changing fan speed (ch %d)\n",
device_xname(sc->sc_dev), chan);
else
DPRINTF("%s changed fan speed (ch %d) to 0x%x\n",
device_xname(sc->sc_dev), chan, val);
iic_release_bus(sc->sc_tag, 0);
return ret;
}
static void
ecadc_fan_adjust(void *v)
{
struct ecadc_softc *sc = v;
struct ecadc_channel *chp;
int i;
u_int8_t temp, speed;
u_int32_t htemp, ffail;
for (i = 0; i < sc->sc_nchan; i++) {
chp = &sc->sc_channels[i];
if (chp->chan_type != PCF8591_SYS_FAN_CTRL)
continue;
/* Check for high temperature or fan failure */
htemp = sysmon_envsys_get_max_value(is_high_temp, true);
ffail = sysmon_envsys_get_max_value(is_fan_fail, true);
if (htemp) {
printf("%s: High temperature detected\n",
device_xname(sc->sc_dev));
/* Set fans to maximum speed */
speed = sc->sc_cpu_fan_spd[0];
} else if (ffail) {
printf("%s: Fan failure detected\n",
device_xname(sc->sc_dev));
/* Set fans to maximum speed */
speed = sc->sc_cpu_fan_spd[0];
} else {
/* Extract the raw value from the max CPU temp */
temp = sysmon_envsys_get_max_value(is_cpu_temp, true)
& 0xff;
if (!temp) {
printf("%s: skipping temp adjustment"
" - no sensor values\n",
device_xname(sc->sc_dev));
return;
}
if (temp > XLATE_MAX)
temp = XLATE_MAX;
speed = chp->chan_xlate[temp];
}
if (speed != chp->chan_speed) {
if (!ecadc_set_fan_speed(sc, chp->chan_num,
speed))
chp->chan_speed = speed;
}
}
}