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zephyr/drivers/sensor/lis2dw12/lis2dw12_trigger.c
Armando Visconti 56ce558094 drivers/sensor: lis2dw12: Move trigger pulse Kconfig property into DT 
Move lis2dw12 trigger pulse configurations from Kconfigs to Device Tree.
Moreover the dts properties have been renamed as 'tap', which sounds a
better name to immediately catch the feature behind it. Since tap
threshold cannot be zero, this value (which is the default in dts
binding) is used to enable/disable the device feature per each axis.
The event can be generated on INT1 only.

Signed-off-by: Armando Visconti <armando.visconti@st.com>
2021-06-29 11:31:06 -04:00

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/* ST Microelectronics LIS2DW12 3-axis accelerometer driver
*
* Copyright (c) 2019 STMicroelectronics
*
* SPDX-License-Identifier: Apache-2.0
*
* Datasheet:
* https://www.st.com/resource/en/datasheet/lis2dw12.pdf
*/
#define DT_DRV_COMPAT st_lis2dw12
#include <kernel.h>
#include <drivers/sensor.h>
#include <drivers/gpio.h>
#include <logging/log.h>
#include "lis2dw12.h"
LOG_MODULE_DECLARE(LIS2DW12, CONFIG_SENSOR_LOG_LEVEL);
/**
* lis2dw12_enable_int - enable selected int pin to generate interrupt
*/
static int lis2dw12_enable_int(const struct device *dev,
enum sensor_trigger_type type, int enable)
{
const struct lis2dw12_device_config *cfg = dev->config;
struct lis2dw12_data *lis2dw12 = dev->data;
lis2dw12_reg_t int_route;
if (cfg->int_pin == 1U) {
/* set interrupt for pin INT1 */
lis2dw12_pin_int1_route_get(lis2dw12->ctx,
&int_route.ctrl4_int1_pad_ctrl);
switch (type) {
case SENSOR_TRIG_DATA_READY:
int_route.ctrl4_int1_pad_ctrl.int1_drdy = enable;
break;
#ifdef CONFIG_LIS2DW12_TAP
case SENSOR_TRIG_TAP:
int_route.ctrl4_int1_pad_ctrl.int1_single_tap = enable;
break;
case SENSOR_TRIG_DOUBLE_TAP:
int_route.ctrl4_int1_pad_ctrl.int1_tap = enable;
break;
#endif /* CONFIG_LIS2DW12_TAP */
default:
LOG_ERR("Unsupported trigger interrupt route");
return -ENOTSUP;
}
return lis2dw12_pin_int1_route_set(lis2dw12->ctx,
&int_route.ctrl4_int1_pad_ctrl);
} else {
/* set interrupt for pin INT2 */
lis2dw12_pin_int2_route_get(lis2dw12->ctx,
&int_route.ctrl5_int2_pad_ctrl);
switch (type) {
case SENSOR_TRIG_DATA_READY:
int_route.ctrl5_int2_pad_ctrl.int2_drdy = enable;
break;
default:
LOG_ERR("Unsupported trigger interrupt route");
return -ENOTSUP;
}
return lis2dw12_pin_int2_route_set(lis2dw12->ctx,
&int_route.ctrl5_int2_pad_ctrl);
}
}
/**
* lis2dw12_trigger_set - link external trigger to event data ready
*/
int lis2dw12_trigger_set(const struct device *dev,
const struct sensor_trigger *trig,
sensor_trigger_handler_t handler)
{
const struct lis2dw12_device_config *cfg = dev->config;
struct lis2dw12_data *lis2dw12 = dev->data;
int16_t raw[3];
int state = (handler != NULL) ? PROPERTY_ENABLE : PROPERTY_DISABLE;
if (cfg->gpio_int.port == NULL) {
LOG_ERR("trigger_set is not supported");
return -ENOTSUP;
}
switch (trig->type) {
case SENSOR_TRIG_DATA_READY:
lis2dw12->drdy_handler = handler;
if (state) {
/* dummy read: re-trigger interrupt */
lis2dw12_acceleration_raw_get(lis2dw12->ctx, raw);
}
return lis2dw12_enable_int(dev, SENSOR_TRIG_DATA_READY, state);
break;
#ifdef CONFIG_LIS2DW12_TAP
case SENSOR_TRIG_TAP:
lis2dw12->tap_handler = handler;
return lis2dw12_enable_int(dev, SENSOR_TRIG_TAP, state);
break;
case SENSOR_TRIG_DOUBLE_TAP:
lis2dw12->double_tap_handler = handler;
return lis2dw12_enable_int(dev, SENSOR_TRIG_DOUBLE_TAP, state);
break;
#endif /* CONFIG_LIS2DW12_TAP */
default:
LOG_ERR("Unsupported sensor trigger");
return -ENOTSUP;
}
}
static int lis2dw12_handle_drdy_int(const struct device *dev)
{
struct lis2dw12_data *data = dev->data;
struct sensor_trigger drdy_trig = {
.type = SENSOR_TRIG_DATA_READY,
.chan = SENSOR_CHAN_ALL,
};
if (data->drdy_handler) {
data->drdy_handler(dev, &drdy_trig);
}
return 0;
}
#ifdef CONFIG_LIS2DW12_TAP
static int lis2dw12_handle_single_tap_int(const struct device *dev)
{
struct lis2dw12_data *data = dev->data;
sensor_trigger_handler_t handler = data->tap_handler;
struct sensor_trigger pulse_trig = {
.type = SENSOR_TRIG_TAP,
.chan = SENSOR_CHAN_ALL,
};
if (handler) {
handler(dev, &pulse_trig);
}
return 0;
}
static int lis2dw12_handle_double_tap_int(const struct device *dev)
{
struct lis2dw12_data *data = dev->data;
sensor_trigger_handler_t handler = data->double_tap_handler;
struct sensor_trigger pulse_trig = {
.type = SENSOR_TRIG_DOUBLE_TAP,
.chan = SENSOR_CHAN_ALL,
};
if (handler) {
handler(dev, &pulse_trig);
}
return 0;
}
#endif /* CONFIG_LIS2DW12_TAP */
/**
* lis2dw12_handle_interrupt - handle the drdy event
* read data and call handler if registered any
*/
static void lis2dw12_handle_interrupt(const struct device *dev)
{
struct lis2dw12_data *lis2dw12 = dev->data;
const struct lis2dw12_device_config *cfg = dev->config;
lis2dw12_all_sources_t sources;
lis2dw12_all_sources_get(lis2dw12->ctx, &sources);
if (sources.status_dup.drdy) {
lis2dw12_handle_drdy_int(dev);
}
#ifdef CONFIG_LIS2DW12_TAP
if (sources.status_dup.single_tap) {
lis2dw12_handle_single_tap_int(dev);
}
if (sources.status_dup.double_tap) {
lis2dw12_handle_double_tap_int(dev);
}
#endif /* CONFIG_LIS2DW12_TAP */
gpio_pin_interrupt_configure_dt(&cfg->gpio_int,
GPIO_INT_EDGE_TO_ACTIVE);
}
static void lis2dw12_gpio_callback(const struct device *dev,
struct gpio_callback *cb, uint32_t pins)
{
struct lis2dw12_data *lis2dw12 =
CONTAINER_OF(cb, struct lis2dw12_data, gpio_cb);
const struct lis2dw12_device_config *cfg = lis2dw12->dev->config;
if ((pins & BIT(cfg->gpio_int.pin)) == 0U) {
return;
}
gpio_pin_interrupt_configure_dt(&cfg->gpio_int, GPIO_INT_DISABLE);
#if defined(CONFIG_LIS2DW12_TRIGGER_OWN_THREAD)
k_sem_give(&lis2dw12->gpio_sem);
#elif defined(CONFIG_LIS2DW12_TRIGGER_GLOBAL_THREAD)
k_work_submit(&lis2dw12->work);
#endif /* CONFIG_LIS2DW12_TRIGGER_OWN_THREAD */
}
#ifdef CONFIG_LIS2DW12_TRIGGER_OWN_THREAD
static void lis2dw12_thread(struct lis2dw12_data *lis2dw12)
{
while (1) {
k_sem_take(&lis2dw12->gpio_sem, K_FOREVER);
lis2dw12_handle_interrupt(lis2dw12->dev);
}
}
#endif /* CONFIG_LIS2DW12_TRIGGER_OWN_THREAD */
#ifdef CONFIG_LIS2DW12_TRIGGER_GLOBAL_THREAD
static void lis2dw12_work_cb(struct k_work *work)
{
struct lis2dw12_data *lis2dw12 =
CONTAINER_OF(work, struct lis2dw12_data, work);
lis2dw12_handle_interrupt(lis2dw12->dev);
}
#endif /* CONFIG_LIS2DW12_TRIGGER_GLOBAL_THREAD */
#ifdef CONFIG_LIS2DW12_TAP
static int lis2dw12_tap_init(const struct device *dev)
{
const struct lis2dw12_device_config *cfg = dev->config;
struct lis2dw12_data *lis2dw12 = dev->data;
LOG_DBG("TAP: tap mode is %d", cfg->tap_mode);
if (lis2dw12_tap_mode_set(lis2dw12->ctx, cfg->tap_mode) < 0) {
LOG_ERR("Failed to select tap trigger mode");
return -EIO;
}
LOG_DBG("TAP: ths_x is %02x", cfg->tap_threshold[0]);
if (lis2dw12_tap_threshold_x_set(lis2dw12->ctx, cfg->tap_threshold[0]) < 0) {
LOG_ERR("Failed to set tap X axis threshold");
return -EIO;
}
LOG_DBG("TAP: ths_y is %02x", cfg->tap_threshold[1]);
if (lis2dw12_tap_threshold_y_set(lis2dw12->ctx, cfg->tap_threshold[1]) < 0) {
LOG_ERR("Failed to set tap Y axis threshold");
return -EIO;
}
LOG_DBG("TAP: ths_z is %02x", cfg->tap_threshold[2]);
if (lis2dw12_tap_threshold_z_set(lis2dw12->ctx, cfg->tap_threshold[2]) < 0) {
LOG_ERR("Failed to set tap Z axis threshold");
return -EIO;
}
if (cfg->tap_threshold[0] > 0) {
LOG_DBG("TAP: tap_x enabled");
if (lis2dw12_tap_detection_on_x_set(lis2dw12->ctx, 1) < 0) {
LOG_ERR("Failed to set tap detection on X axis");
return -EIO;
}
}
if (cfg->tap_threshold[1] > 0) {
LOG_DBG("TAP: tap_y enabled");
if (lis2dw12_tap_detection_on_y_set(lis2dw12->ctx, 1) < 0) {
LOG_ERR("Failed to set tap detection on Y axis");
return -EIO;
}
}
if (cfg->tap_threshold[2] > 0) {
LOG_DBG("TAP: tap_z enabled");
if (lis2dw12_tap_detection_on_z_set(lis2dw12->ctx, 1) < 0) {
LOG_ERR("Failed to set tap detection on Z axis");
return -EIO;
}
}
LOG_DBG("TAP: shock is %02x", cfg->tap_shock);
if (lis2dw12_tap_shock_set(lis2dw12->ctx, cfg->tap_shock) < 0) {
LOG_ERR("Failed to set tap shock duration");
return -EIO;
}
LOG_DBG("TAP: latency is %02x", cfg->tap_latency);
if (lis2dw12_tap_dur_set(lis2dw12->ctx, cfg->tap_latency) < 0) {
LOG_ERR("Failed to set tap latency");
return -EIO;
}
LOG_DBG("TAP: quiet time is %02x", cfg->tap_quiet);
if (lis2dw12_tap_quiet_set(lis2dw12->ctx, cfg->tap_quiet) < 0) {
LOG_ERR("Failed to set tap quiet time");
return -EIO;
}
return 0;
}
#endif /* CONFIG_LIS2DW12_TAP */
int lis2dw12_init_interrupt(const struct device *dev)
{
struct lis2dw12_data *lis2dw12 = dev->data;
const struct lis2dw12_device_config *cfg = dev->config;
int ret;
/* setup data ready gpio interrupt (INT1 or INT2) */
if (!device_is_ready(cfg->gpio_int.port)) {
if (cfg->gpio_int.port) {
LOG_ERR("%s: device %s is not ready", dev->name,
cfg->gpio_int.port->name);
return -ENODEV;
}
LOG_DBG("%s: gpio_int not defined in DT", dev->name);
return 0;
}
lis2dw12->dev = dev;
LOG_INF("%s: int-pin is on INT%d", dev->name, cfg->int_pin);
#if defined(CONFIG_LIS2DW12_TRIGGER_OWN_THREAD)
k_sem_init(&lis2dw12->gpio_sem, 0, K_SEM_MAX_LIMIT);
k_thread_create(&lis2dw12->thread, lis2dw12->thread_stack,
CONFIG_LIS2DW12_THREAD_STACK_SIZE,
(k_thread_entry_t)lis2dw12_thread, lis2dw12,
NULL, NULL, K_PRIO_COOP(CONFIG_LIS2DW12_THREAD_PRIORITY),
0, K_NO_WAIT);
#elif defined(CONFIG_LIS2DW12_TRIGGER_GLOBAL_THREAD)
lis2dw12->work.handler = lis2dw12_work_cb;
#endif /* CONFIG_LIS2DW12_TRIGGER_OWN_THREAD */
ret = gpio_pin_configure_dt(&cfg->gpio_int, GPIO_INPUT);
if (ret < 0) {
LOG_ERR("Could not configure gpio");
return ret;
}
LOG_INF("%s: int on %s.%02u", dev->name, cfg->gpio_int.port->name,
cfg->gpio_int.pin);
gpio_init_callback(&lis2dw12->gpio_cb,
lis2dw12_gpio_callback,
BIT(cfg->gpio_int.pin));
if (gpio_add_callback(cfg->gpio_int.port, &lis2dw12->gpio_cb) < 0) {
LOG_DBG("Could not set gpio callback");
return -EIO;
}
/* enable interrupt on int1/int2 in pulse mode */
if (lis2dw12_int_notification_set(lis2dw12->ctx, LIS2DW12_INT_PULSED)) {
return -EIO;
}
#ifdef CONFIG_LIS2DW12_TAP
ret = lis2dw12_tap_init(dev);
if (ret < 0) {
return ret;
}
#endif /* CONFIG_LIS2DW12_TAP */
return gpio_pin_interrupt_configure_dt(&cfg->gpio_int,
GPIO_INT_EDGE_TO_ACTIVE);
}
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