281 lines
6.7 KiB
C
281 lines
6.7 KiB
C
/*-
|
|
* Copyright (c) 2010 Nathan Whitehorn
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/module.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/cpu.h>
|
|
#include <sys/ctype.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <dev/iicbus/iicbus.h>
|
|
#include <dev/iicbus/iiconf.h>
|
|
#include <dev/ofw/ofw_bus.h>
|
|
#include <dev/ofw/openfirm.h>
|
|
|
|
#include <powerpc/powermac/powermac_thermal.h>
|
|
|
|
struct smu_sensor {
|
|
struct pmac_therm therm;
|
|
device_t dev;
|
|
|
|
cell_t reg;
|
|
enum {
|
|
SMU_CURRENT_SENSOR,
|
|
SMU_VOLTAGE_SENSOR,
|
|
SMU_POWER_SENSOR,
|
|
SMU_TEMP_SENSOR
|
|
} type;
|
|
};
|
|
|
|
static int smusat_probe(device_t);
|
|
static int smusat_attach(device_t);
|
|
static int smusat_sensor_sysctl(SYSCTL_HANDLER_ARGS);
|
|
static int smusat_sensor_read(struct smu_sensor *sens);
|
|
|
|
MALLOC_DEFINE(M_SMUSAT, "smusat", "SMU Sattelite Sensors");
|
|
|
|
static device_method_t smusat_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, smusat_probe),
|
|
DEVMETHOD(device_attach, smusat_attach),
|
|
{ 0, 0 },
|
|
};
|
|
|
|
struct smusat_softc {
|
|
struct smu_sensor *sc_sensors;
|
|
int sc_nsensors;
|
|
|
|
uint8_t sc_cache[16];
|
|
time_t sc_last_update;
|
|
};
|
|
|
|
static driver_t smusat_driver = {
|
|
"smusat",
|
|
smusat_methods,
|
|
sizeof(struct smusat_softc)
|
|
};
|
|
|
|
static devclass_t smusat_devclass;
|
|
|
|
DRIVER_MODULE(smusat, iicbus, smusat_driver, smusat_devclass, 0, 0);
|
|
|
|
static int
|
|
smusat_probe(device_t dev)
|
|
{
|
|
const char *compat = ofw_bus_get_compat(dev);
|
|
|
|
if (compat == NULL || strcmp(compat, "smu-sat") != 0)
|
|
return (ENXIO);
|
|
|
|
device_set_desc(dev, "SMU Satellite Sensors");
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
smusat_attach(device_t dev)
|
|
{
|
|
phandle_t child;
|
|
struct smu_sensor *sens;
|
|
struct smusat_softc *sc;
|
|
struct sysctl_oid *sensroot_oid;
|
|
struct sysctl_ctx_list *ctx;
|
|
char type[32];
|
|
int i;
|
|
|
|
sc = device_get_softc(dev);
|
|
sc->sc_nsensors = 0;
|
|
sc->sc_last_update = 0;
|
|
|
|
for (child = OF_child(ofw_bus_get_node(dev)); child != 0;
|
|
child = OF_peer(child))
|
|
sc->sc_nsensors++;
|
|
|
|
if (sc->sc_nsensors == 0) {
|
|
device_printf(dev, "WARNING: No sensors detected!\n");
|
|
return (-1);
|
|
}
|
|
|
|
sc->sc_sensors = malloc(sc->sc_nsensors * sizeof(struct smu_sensor),
|
|
M_SMUSAT, M_WAITOK | M_ZERO);
|
|
|
|
sens = sc->sc_sensors;
|
|
sc->sc_nsensors = 0;
|
|
|
|
ctx = device_get_sysctl_ctx(dev);
|
|
sensroot_oid = device_get_sysctl_tree(dev);
|
|
|
|
for (child = OF_child(ofw_bus_get_node(dev)); child != 0;
|
|
child = OF_peer(child)) {
|
|
char sysctl_name[40], sysctl_desc[40];
|
|
const char *units;
|
|
|
|
sens->dev = dev;
|
|
sens->reg = 0;
|
|
OF_getprop(child, "reg", &sens->reg, sizeof(sens->reg));
|
|
if (sens->reg < 0x30)
|
|
continue;
|
|
sens->reg -= 0x30;
|
|
|
|
OF_getprop(child, "zone", &sens->therm.zone, sizeof(int));
|
|
OF_getprop(child, "location", sens->therm.name,
|
|
sizeof(sens->therm.name));
|
|
|
|
OF_getprop(child, "device_type", type, sizeof(type));
|
|
|
|
if (strcmp(type, "current-sensor") == 0) {
|
|
sens->type = SMU_CURRENT_SENSOR;
|
|
units = "mA";
|
|
} else if (strcmp(type, "temp-sensor") == 0) {
|
|
sens->type = SMU_TEMP_SENSOR;
|
|
units = "C";
|
|
} else if (strcmp(type, "voltage-sensor") == 0) {
|
|
sens->type = SMU_VOLTAGE_SENSOR;
|
|
units = "mV";
|
|
} else if (strcmp(type, "power-sensor") == 0) {
|
|
sens->type = SMU_POWER_SENSOR;
|
|
units = "mW";
|
|
} else {
|
|
continue;
|
|
}
|
|
|
|
for (i = 0; i < strlen(sens->therm.name); i++) {
|
|
sysctl_name[i] = tolower(sens->therm.name[i]);
|
|
if (isspace(sysctl_name[i]))
|
|
sysctl_name[i] = '_';
|
|
}
|
|
sysctl_name[i] = 0;
|
|
|
|
sprintf(sysctl_desc,"%s (%s)", sens->therm.name, units);
|
|
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(sensroot_oid), OID_AUTO,
|
|
sysctl_name, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, dev,
|
|
sc->sc_nsensors, smusat_sensor_sysctl,
|
|
(sens->type == SMU_TEMP_SENSOR) ? "IK" : "I", sysctl_desc);
|
|
|
|
if (sens->type == SMU_TEMP_SENSOR) {
|
|
/* Make up some numbers */
|
|
sens->therm.target_temp = 500 + 2732; /* 50 C */
|
|
sens->therm.max_temp = 900 + 2732; /* 90 C */
|
|
sens->therm.read =
|
|
(int (*)(struct pmac_therm *))smusat_sensor_read;
|
|
pmac_thermal_sensor_register(&sens->therm);
|
|
}
|
|
|
|
sens++;
|
|
sc->sc_nsensors++;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
smusat_updatecache(device_t dev)
|
|
{
|
|
uint8_t reg = 0x3f;
|
|
struct smusat_softc *sc = device_get_softc(dev);
|
|
struct iic_msg msgs[2] = {
|
|
{0, IIC_M_WR | IIC_M_NOSTOP, 1, ®},
|
|
{0, IIC_M_RD, 16, sc->sc_cache},
|
|
};
|
|
|
|
msgs[0].slave = msgs[1].slave = iicbus_get_addr(dev);
|
|
sc->sc_last_update = time_uptime;
|
|
|
|
return (iicbus_transfer(dev, msgs, 2));
|
|
}
|
|
|
|
static int
|
|
smusat_sensor_read(struct smu_sensor *sens)
|
|
{
|
|
int value;
|
|
device_t dev;
|
|
struct smusat_softc *sc;
|
|
|
|
dev = sens->dev;
|
|
sc = device_get_softc(dev);
|
|
|
|
if (time_uptime - sc->sc_last_update > 1)
|
|
smusat_updatecache(dev);
|
|
|
|
value = (sc->sc_cache[sens->reg*2] << 8) +
|
|
sc->sc_cache[sens->reg*2 + 1];
|
|
|
|
switch (sens->type) {
|
|
case SMU_TEMP_SENSOR:
|
|
/* 16.16 */
|
|
value <<= 10;
|
|
/* From 16.16 to 0.1 C */
|
|
value = 10*(value >> 16) + ((10*(value & 0xffff)) >> 16) + 2732;
|
|
break;
|
|
case SMU_VOLTAGE_SENSOR:
|
|
/* 16.16 */
|
|
value <<= 4;
|
|
/* Kill the .16 */
|
|
value >>= 16;
|
|
break;
|
|
case SMU_CURRENT_SENSOR:
|
|
/* 16.16 */
|
|
value <<= 8;
|
|
/* Kill the .16 */
|
|
value >>= 16;
|
|
break;
|
|
case SMU_POWER_SENSOR:
|
|
/* Doesn't exist */
|
|
break;
|
|
}
|
|
|
|
return (value);
|
|
}
|
|
|
|
static int
|
|
smusat_sensor_sysctl(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
device_t dev;
|
|
struct smusat_softc *sc;
|
|
struct smu_sensor *sens;
|
|
int value, error;
|
|
|
|
dev = arg1;
|
|
sc = device_get_softc(dev);
|
|
sens = &sc->sc_sensors[arg2];
|
|
|
|
value = smusat_sensor_read(sens);
|
|
if (value < 0)
|
|
return (EBUSY);
|
|
|
|
error = sysctl_handle_int(oidp, &value, 0, req);
|
|
|
|
return (error);
|
|
}
|
|
|