blob: 274e17d82032780b3b6e95609b90c9eb5f508829 [file] [log] [blame]
/* ST Microelectronics IIS2DLPC 3-axis accelerometer driver
*
* Copyright (c) 2020 STMicroelectronics
*
* SPDX-License-Identifier: Apache-2.0
*
* Datasheet:
* https://www.st.com/resource/en/datasheet/iis2dlpc.pdf
*/
#define DT_DRV_COMPAT st_iis2dlpc
#include <kernel.h>
#include <drivers/sensor.h>
#include <drivers/gpio.h>
#include <logging/log.h>
#include "iis2dlpc.h"
LOG_MODULE_DECLARE(IIS2DLPC, CONFIG_SENSOR_LOG_LEVEL);
/**
* iis2dlpc_enable_int - enable selected int pin to generate interrupt
*/
static int iis2dlpc_enable_int(const struct device *dev,
enum sensor_trigger_type type, int enable)
{
const struct iis2dlpc_config *cfg = dev->config;
stmdev_ctx_t *ctx = (stmdev_ctx_t *)&cfg->ctx;
iis2dlpc_reg_t int_route;
switch (type) {
case SENSOR_TRIG_DATA_READY:
if (cfg->drdy_int == 1) {
/* set interrupt for pin INT1 */
iis2dlpc_pin_int1_route_get(ctx,
&int_route.ctrl4_int1_pad_ctrl);
int_route.ctrl4_int1_pad_ctrl.int1_drdy = enable;
return iis2dlpc_pin_int1_route_set(ctx,
&int_route.ctrl4_int1_pad_ctrl);
} else {
/* set interrupt for pin INT2 */
iis2dlpc_pin_int2_route_get(ctx,
&int_route.ctrl5_int2_pad_ctrl);
int_route.ctrl5_int2_pad_ctrl.int2_drdy = enable;
return iis2dlpc_pin_int2_route_set(ctx,
&int_route.ctrl5_int2_pad_ctrl);
}
break;
#ifdef CONFIG_IIS2DLPC_TAP
case SENSOR_TRIG_TAP:
/* set interrupt for pin INT1 */
iis2dlpc_pin_int1_route_get(ctx,
&int_route.ctrl4_int1_pad_ctrl);
int_route.ctrl4_int1_pad_ctrl.int1_single_tap = enable;
return iis2dlpc_pin_int1_route_set(ctx,
&int_route.ctrl4_int1_pad_ctrl);
case SENSOR_TRIG_DOUBLE_TAP:
/* set interrupt for pin INT1 */
iis2dlpc_pin_int1_route_get(ctx,
&int_route.ctrl4_int1_pad_ctrl);
int_route.ctrl4_int1_pad_ctrl.int1_tap = enable;
return iis2dlpc_pin_int1_route_set(ctx,
&int_route.ctrl4_int1_pad_ctrl);
#endif /* CONFIG_IIS2DLPC_TAP */
default:
LOG_ERR("Unsupported trigger interrupt route %d", type);
return -ENOTSUP;
}
}
/**
* iis2dlpc_trigger_set - link external trigger to event data ready
*/
int iis2dlpc_trigger_set(const struct device *dev,
const struct sensor_trigger *trig,
sensor_trigger_handler_t handler)
{
const struct iis2dlpc_config *cfg = dev->config;
stmdev_ctx_t *ctx = (stmdev_ctx_t *)&cfg->ctx;
struct iis2dlpc_data *iis2dlpc = dev->data;
int16_t raw[3];
int state = (handler != NULL) ? PROPERTY_ENABLE : PROPERTY_DISABLE;
switch (trig->type) {
case SENSOR_TRIG_DATA_READY:
iis2dlpc->drdy_handler = handler;
if (state) {
/* dummy read: re-trigger interrupt */
iis2dlpc_acceleration_raw_get(ctx, raw);
}
return iis2dlpc_enable_int(dev, SENSOR_TRIG_DATA_READY, state);
#ifdef CONFIG_IIS2DLPC_TAP
case SENSOR_TRIG_TAP:
iis2dlpc->tap_handler = handler;
return iis2dlpc_enable_int(dev, SENSOR_TRIG_TAP, state);
case SENSOR_TRIG_DOUBLE_TAP:
iis2dlpc->double_tap_handler = handler;
return iis2dlpc_enable_int(dev, SENSOR_TRIG_DOUBLE_TAP, state);
#endif /* CONFIG_IIS2DLPC_TAP */
default:
LOG_ERR("Unsupported sensor trigger");
return -ENOTSUP;
}
}
static int iis2dlpc_handle_drdy_int(const struct device *dev)
{
struct iis2dlpc_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_IIS2DLPC_TAP
static int iis2dlpc_handle_single_tap_int(const struct device *dev)
{
struct iis2dlpc_data *data = dev->data;
sensor_trigger_handler_t handler = data->tap_handler;
struct sensor_trigger tap_trig = {
.type = SENSOR_TRIG_TAP,
.chan = SENSOR_CHAN_ALL,
};
if (handler) {
handler(dev, &tap_trig);
}
return 0;
}
static int iis2dlpc_handle_double_tap_int(const struct device *dev)
{
struct iis2dlpc_data *data = dev->data;
sensor_trigger_handler_t handler = data->double_tap_handler;
struct sensor_trigger tap_trig = {
.type = SENSOR_TRIG_DOUBLE_TAP,
.chan = SENSOR_CHAN_ALL,
};
if (handler) {
handler(dev, &tap_trig);
}
return 0;
}
#endif /* CONFIG_IIS2DLPC_TAP */
/**
* iis2dlpc_handle_interrupt - handle the drdy event
* read data and call handler if registered any
*/
static void iis2dlpc_handle_interrupt(const struct device *dev)
{
const struct iis2dlpc_config *cfg = dev->config;
stmdev_ctx_t *ctx = (stmdev_ctx_t *)&cfg->ctx;
iis2dlpc_all_sources_t sources;
iis2dlpc_all_sources_get(ctx, &sources);
if (sources.status_dup.drdy) {
iis2dlpc_handle_drdy_int(dev);
}
#ifdef CONFIG_IIS2DLPC_TAP
if (sources.status_dup.single_tap) {
iis2dlpc_handle_single_tap_int(dev);
}
if (sources.status_dup.double_tap) {
iis2dlpc_handle_double_tap_int(dev);
}
#endif /* CONFIG_IIS2DLPC_TAP */
gpio_pin_interrupt_configure_dt(&cfg->gpio_drdy,
GPIO_INT_EDGE_TO_ACTIVE);
}
static void iis2dlpc_gpio_callback(const struct device *dev,
struct gpio_callback *cb, uint32_t pins)
{
struct iis2dlpc_data *iis2dlpc =
CONTAINER_OF(cb, struct iis2dlpc_data, gpio_cb);
const struct iis2dlpc_config *cfg = iis2dlpc->dev->config;
ARG_UNUSED(pins);
gpio_pin_interrupt_configure_dt(&cfg->gpio_drdy, GPIO_INT_DISABLE);
#if defined(CONFIG_IIS2DLPC_TRIGGER_OWN_THREAD)
k_sem_give(&iis2dlpc->gpio_sem);
#elif defined(CONFIG_IIS2DLPC_TRIGGER_GLOBAL_THREAD)
k_work_submit(&iis2dlpc->work);
#endif /* CONFIG_IIS2DLPC_TRIGGER_OWN_THREAD */
}
#ifdef CONFIG_IIS2DLPC_TRIGGER_OWN_THREAD
static void iis2dlpc_thread(struct iis2dlpc_data *iis2dlpc)
{
while (1) {
k_sem_take(&iis2dlpc->gpio_sem, K_FOREVER);
iis2dlpc_handle_interrupt(iis2dlpc->dev);
}
}
#endif /* CONFIG_IIS2DLPC_TRIGGER_OWN_THREAD */
#ifdef CONFIG_IIS2DLPC_TRIGGER_GLOBAL_THREAD
static void iis2dlpc_work_cb(struct k_work *work)
{
struct iis2dlpc_data *iis2dlpc =
CONTAINER_OF(work, struct iis2dlpc_data, work);
iis2dlpc_handle_interrupt(iis2dlpc->dev);
}
#endif /* CONFIG_IIS2DLPC_TRIGGER_GLOBAL_THREAD */
int iis2dlpc_init_interrupt(const struct device *dev)
{
struct iis2dlpc_data *iis2dlpc = dev->data;
const struct iis2dlpc_config *cfg = dev->config;
stmdev_ctx_t *ctx = (stmdev_ctx_t *)&cfg->ctx;
int ret;
/* setup data ready gpio interrupt (INT1 or INT2) */
if (!device_is_ready(cfg->gpio_drdy.port)) {
LOG_ERR("Cannot get pointer to drdy_gpio device");
return -EINVAL;
}
#if defined(CONFIG_IIS2DLPC_TRIGGER_OWN_THREAD)
k_sem_init(&iis2dlpc->gpio_sem, 0, K_SEM_MAX_LIMIT);
k_thread_create(&iis2dlpc->thread, iis2dlpc->thread_stack,
CONFIG_IIS2DLPC_THREAD_STACK_SIZE,
(k_thread_entry_t)iis2dlpc_thread, iis2dlpc,
NULL, NULL, K_PRIO_COOP(CONFIG_IIS2DLPC_THREAD_PRIORITY),
0, K_NO_WAIT);
#elif defined(CONFIG_IIS2DLPC_TRIGGER_GLOBAL_THREAD)
iis2dlpc->work.handler = iis2dlpc_work_cb;
#endif /* CONFIG_IIS2DLPC_TRIGGER_OWN_THREAD */
ret = gpio_pin_configure_dt(&cfg->gpio_drdy, GPIO_INPUT);
if (ret < 0) {
LOG_ERR("Could not configure gpio");
return ret;
}
gpio_init_callback(&iis2dlpc->gpio_cb,
iis2dlpc_gpio_callback,
BIT(cfg->gpio_drdy.pin));
if (gpio_add_callback(cfg->gpio_drdy.port, &iis2dlpc->gpio_cb) < 0) {
LOG_ERR("Could not set gpio callback");
return -EIO;
}
/* enable interrupt on int1/int2 in pulse mode */
if (iis2dlpc_int_notification_set(ctx, IIS2DLPC_INT_PULSED)) {
LOG_ERR("Could not set pulse mode");
return -EIO;
}
return gpio_pin_interrupt_configure_dt(&cfg->gpio_drdy,
GPIO_INT_EDGE_TO_ACTIVE);
}