6665c7a628
The register map is fairly similar, with one difference in the local sensor temperature register width. Both devices support reading two sensors - "local" and "remote". While here add support for the latter one. The ADT7461 doesn't update the temperature correctly, unless a write transaction is done before every read. Do just that as a workaround for this issue. Tested on LS1046ARDB. Reviewed by: manu Obtained from: Semihalf Differential Revision: https://reviews.freebsd.org/D36464
313 lines
8.0 KiB
C
313 lines
8.0 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* Copyright (c) 2021 Alstom Group.
|
|
* Copyright (c) 2021 Semihalf.
|
|
*
|
|
* 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 "opt_platform.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/module.h>
|
|
#include <sys/ctype.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/libkern.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <dev/iicbus/iicbus.h>
|
|
#include <dev/iicbus/iiconf.h>
|
|
|
|
#include <dev/ofw/ofw_bus_subr.h>
|
|
#include <dev/ofw/ofw_bus.h>
|
|
|
|
#define BIT(x) (1UL << (x))
|
|
|
|
/* register map */
|
|
#define TMP461_LOCAL_TEMP_REG_MSB 0x0
|
|
#define TMP461_LOCAL_TEMP_REG_LSB 0x15
|
|
#define TMP461_GLOBAL_TEMP_REG_MSB 0x1
|
|
#define TMP461_GLOBAL_TEMP_REG_LSB 0x10
|
|
#define TMP461_STATUS_REG 0x2
|
|
#define TMP461_STATUS_REG_TEMP_LOCAL BIT(2)
|
|
#define TMP461_CONFIG_REG_R 0x3
|
|
#define TMP461_CONFIG_REG_W 0x9
|
|
#define TMP461_CONFIG_REG_TEMP_RANGE_BIT BIT(2)
|
|
#define TMP461_CONFIG_REG_STANDBY_BIT BIT(6)
|
|
#define TMP461_CONVERSION_RATE_REG 0x4
|
|
#define TMP461_ONESHOT_REG 0xF
|
|
#define TMP461_EXTENDED_TEMP_MODIFIER 64
|
|
|
|
/* 28.4 fixed point representation of 273.15f */
|
|
#define TMP461_C_TO_K_FIX 4370
|
|
|
|
#define TMP461_SENSOR_MAX_CONV_TIME 16000000
|
|
#define TMP461_LOCAL_MEASURE 0
|
|
#define TMP461_REMOTE_MEASURE 1
|
|
|
|
/* flags */
|
|
#define TMP461_LOCAL_TEMP_DOUBLE_REG BIT(0)
|
|
#define TMP461_REMOTE_TEMP_DOUBLE_REG BIT(1)
|
|
|
|
static int tmp461_probe(device_t dev);
|
|
static int tmp461_attach(device_t dev);
|
|
static int tmp461_read_1(device_t dev, uint8_t reg, uint8_t *data);
|
|
static int tmp461_write_1(device_t dev, uint8_t reg, uint8_t data);
|
|
static int tmp461_read_temperature(device_t dev, int32_t *temperature, bool mode);
|
|
static int tmp461_detach(device_t dev);
|
|
static int tmp461_sensor_sysctl(SYSCTL_HANDLER_ARGS);
|
|
|
|
static device_method_t tmp461_methods[] = {
|
|
DEVMETHOD(device_probe, tmp461_probe),
|
|
DEVMETHOD(device_attach, tmp461_attach),
|
|
DEVMETHOD(device_detach, tmp461_detach),
|
|
|
|
DEVMETHOD_END
|
|
};
|
|
|
|
struct tmp461_softc {
|
|
struct mtx mtx;
|
|
uint8_t conf;
|
|
};
|
|
|
|
static driver_t tmp461_driver = {
|
|
"tmp461_dev",
|
|
tmp461_methods,
|
|
sizeof(struct tmp461_softc)
|
|
};
|
|
|
|
struct tmp461_data {
|
|
const char *compat;
|
|
const char *desc;
|
|
uint8_t flags;
|
|
};
|
|
|
|
static struct tmp461_data sensor_list[] = {
|
|
{"adt7461", "ADT7461 Thernal Sensor Information",
|
|
TMP461_REMOTE_TEMP_DOUBLE_REG},
|
|
{"tmp461", "TMP461 Thernal Sensor Information",
|
|
TMP461_LOCAL_TEMP_DOUBLE_REG | TMP461_REMOTE_TEMP_DOUBLE_REG}
|
|
};
|
|
|
|
static struct ofw_compat_data tmp461_compat_data[] = {
|
|
{"adi,adt7461", (uintptr_t)&sensor_list[0]},
|
|
{"ti,tmp461", (uintptr_t)&sensor_list[1]},
|
|
{NULL, 0}
|
|
};
|
|
|
|
DRIVER_MODULE(tmp461, iicbus, tmp461_driver, 0, 0);
|
|
IICBUS_FDT_PNP_INFO(tmp461_compat_data);
|
|
|
|
static int
|
|
tmp461_attach(device_t dev)
|
|
{
|
|
struct sysctl_oid *sensor_root_oid;
|
|
struct tmp461_data *compat_data;
|
|
struct sysctl_ctx_list *ctx;
|
|
struct tmp461_softc *sc;
|
|
uint8_t data;
|
|
|
|
sc = device_get_softc(dev);
|
|
compat_data = (struct tmp461_data *)
|
|
ofw_bus_search_compatible(dev, tmp461_compat_data)->ocd_data;
|
|
sc->conf = compat_data->flags;
|
|
ctx = device_get_sysctl_ctx(dev);
|
|
|
|
mtx_init(&sc->mtx, "tmp461 temperature", "temperature", MTX_DEF);
|
|
|
|
sensor_root_oid = SYSCTL_ADD_NODE(ctx, SYSCTL_STATIC_CHILDREN(_hw),
|
|
OID_AUTO, "temperature", CTLFLAG_RD | CTLFLAG_MPSAFE, NULL,
|
|
"Thermal Sensor Information");
|
|
if (sensor_root_oid == NULL)
|
|
return (ENXIO);
|
|
|
|
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(sensor_root_oid), OID_AUTO,
|
|
"local_sensor", CTLTYPE_INT | CTLFLAG_RD, dev,
|
|
TMP461_LOCAL_MEASURE, tmp461_sensor_sysctl,
|
|
"IK1", compat_data->desc);
|
|
|
|
/* get status register */
|
|
if (tmp461_read_1(dev, TMP461_STATUS_REG, &data) != 0)
|
|
return (ENXIO);
|
|
|
|
if (!(data & TMP461_STATUS_REG_TEMP_LOCAL))
|
|
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(sensor_root_oid), OID_AUTO,
|
|
"remote_sensor", CTLTYPE_INT | CTLFLAG_RD, dev,
|
|
TMP461_REMOTE_MEASURE, tmp461_sensor_sysctl,
|
|
"IK1", compat_data->desc);
|
|
|
|
/* set standby mode */
|
|
if (tmp461_read_1(dev, TMP461_CONFIG_REG_R, &data) != 0)
|
|
return (ENXIO);
|
|
|
|
data |= TMP461_CONFIG_REG_STANDBY_BIT;
|
|
if (tmp461_write_1(dev, TMP461_CONFIG_REG_W, data) != 0)
|
|
return (ENXIO);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
tmp461_probe(device_t dev)
|
|
{
|
|
struct tmp461_data *compat_data;
|
|
|
|
if (!ofw_bus_status_okay(dev))
|
|
return (ENXIO);
|
|
|
|
compat_data = (struct tmp461_data *)
|
|
ofw_bus_search_compatible(dev, tmp461_compat_data)->ocd_data;
|
|
if (!compat_data)
|
|
return (ENXIO);
|
|
|
|
device_set_desc(dev, compat_data->compat);
|
|
|
|
return (BUS_PROBE_GENERIC);
|
|
}
|
|
|
|
static int
|
|
tmp461_detach(device_t dev)
|
|
{
|
|
struct tmp461_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
mtx_destroy(&sc->mtx);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
tmp461_read_1(device_t dev, uint8_t reg, uint8_t *data)
|
|
{
|
|
int error;
|
|
|
|
error = iicdev_readfrom(dev, reg, (void *) data, 1, IIC_DONTWAIT);
|
|
if (error != 0)
|
|
device_printf(dev, "Failed to read from device\n");
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
tmp461_write_1(device_t dev, uint8_t reg, uint8_t data)
|
|
{
|
|
int error;
|
|
|
|
error = iicdev_writeto(dev, reg, (void *) &data, 1, IIC_DONTWAIT);
|
|
if (error != 0)
|
|
device_printf(dev, "Failed to write to device\n");
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
tmp461_read_temperature(device_t dev, int32_t *temperature, bool remote_measure)
|
|
{
|
|
uint8_t data, offset, reg;
|
|
struct tmp461_softc *sc;
|
|
int error;
|
|
|
|
sc = device_get_softc(dev);
|
|
|
|
mtx_lock(&sc->mtx);
|
|
|
|
error = tmp461_read_1(dev, TMP461_CONVERSION_RATE_REG, &data);
|
|
if (error != 0)
|
|
goto fail;
|
|
|
|
/* trigger sample*/
|
|
error = tmp461_write_1(dev, TMP461_ONESHOT_REG, 0xFF);
|
|
if (error != 0)
|
|
goto fail;
|
|
|
|
/* wait for conversion time */
|
|
DELAY(TMP461_SENSOR_MAX_CONV_TIME/(1UL<<data));
|
|
|
|
/* read config register offset */
|
|
error = tmp461_read_1(dev, TMP461_CONFIG_REG_R, &data);
|
|
if (error != 0)
|
|
goto fail;
|
|
|
|
offset = (data & TMP461_CONFIG_REG_TEMP_RANGE_BIT ?
|
|
TMP461_EXTENDED_TEMP_MODIFIER : 0);
|
|
|
|
reg = remote_measure ?
|
|
TMP461_GLOBAL_TEMP_REG_MSB : TMP461_LOCAL_TEMP_REG_MSB;
|
|
|
|
/* read temeperature value*/
|
|
error = tmp461_read_1(dev, reg, &data);
|
|
if (error != 0)
|
|
goto fail;
|
|
|
|
data -= offset;
|
|
*temperature = signed_extend32(data, 0, 8) << 4;
|
|
|
|
if (remote_measure) {
|
|
if (sc->conf & TMP461_REMOTE_TEMP_DOUBLE_REG) {
|
|
error = tmp461_read_1(dev,
|
|
TMP461_GLOBAL_TEMP_REG_LSB, &data);
|
|
if (error != 0)
|
|
goto fail;
|
|
|
|
*temperature |= data >> 4;
|
|
}
|
|
} else {
|
|
if (sc->conf & TMP461_LOCAL_TEMP_DOUBLE_REG) {
|
|
error = tmp461_read_1(dev,
|
|
TMP461_LOCAL_TEMP_REG_LSB, &data);
|
|
if (error != 0)
|
|
goto fail;
|
|
|
|
*temperature |= data >> 4;
|
|
}
|
|
}
|
|
*temperature = (((*temperature + TMP461_C_TO_K_FIX) * 10) >> 4);
|
|
|
|
fail:
|
|
mtx_unlock(&sc->mtx);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
tmp461_sensor_sysctl(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
int32_t temperature;
|
|
device_t dev;
|
|
int error;
|
|
bool mode;
|
|
|
|
dev = arg1;
|
|
mode = arg2;
|
|
|
|
error = tmp461_read_temperature(dev, &temperature, mode);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
return (sysctl_handle_int(oidp, &temperature, 0, req));
|
|
}
|