134 lines
3.1 KiB
C
134 lines
3.1 KiB
C
/*
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* Copyright (c) 2016 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <drivers/sensor.h>
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#include <kernel.h>
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#include <device.h>
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#include <init.h>
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#include <drivers/i2c.h>
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#include <sys/byteorder.h>
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#include <sys/__assert.h>
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#include <logging/log.h>
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#include <drivers/gpio.h>
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#include "lsm9ds0_gyro.h"
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extern struct lsm9ds0_gyro_data lsm9ds0_gyro_data;
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LOG_MODULE_DECLARE(LSM9DS0_GYRO, CONFIG_SENSOR_LOG_LEVEL);
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static inline void setup_drdy(struct device *dev,
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bool enable)
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{
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struct lsm9ds0_gyro_data *data = dev->driver_data;
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const struct lsm9ds0_gyro_config *cfg = dev->config_info;
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gpio_pin_interrupt_configure(data->gpio_drdy,
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cfg->gpio_drdy_int_pin,
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enable
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? GPIO_INT_EDGE_TO_ACTIVE
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: GPIO_INT_DISABLE);
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}
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int lsm9ds0_gyro_trigger_set(struct device *dev,
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const struct sensor_trigger *trig,
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sensor_trigger_handler_t handler)
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{
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struct lsm9ds0_gyro_data *data = dev->driver_data;
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const struct lsm9ds0_gyro_config * const config =
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dev->config_info;
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uint8_t state;
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if (trig->type == SENSOR_TRIG_DATA_READY) {
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setup_drdy(dev, false);
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state = 0U;
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if (handler) {
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state = 1U;
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}
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data->handler_drdy = handler;
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data->trigger_drdy = *trig;
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if (i2c_reg_update_byte(data->i2c_master,
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config->i2c_slave_addr,
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LSM9DS0_GYRO_REG_CTRL_REG3_G,
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LSM9DS0_GYRO_MASK_CTRL_REG3_G_I2_DRDY,
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state << LSM9DS0_GYRO_SHIFT_CTRL_REG3_G_I2_DRDY)
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< 0) {
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LOG_DBG("failed to set DRDY interrupt");
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return -EIO;
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}
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setup_drdy(dev, true);
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return 0;
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}
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return -ENOTSUP;
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}
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static void lsm9ds0_gyro_gpio_drdy_callback(struct device *dev,
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struct gpio_callback *cb, uint32_t pins)
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{
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struct lsm9ds0_gyro_data *data =
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CONTAINER_OF(cb, struct lsm9ds0_gyro_data, gpio_cb);
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setup_drdy(data->dev, false);
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k_sem_give(&data->sem);
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}
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static void lsm9ds0_gyro_thread_main(void *arg1, void *arg2, void *arg3)
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{
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struct device *dev = (struct device *) arg1;
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struct lsm9ds0_gyro_data *data = dev->driver_data;
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while (1) {
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k_sem_take(&data->sem, K_FOREVER);
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if (data->handler_drdy) {
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data->handler_drdy(dev, &data->trigger_drdy);
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}
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setup_drdy(dev, true);
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}
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}
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int lsm9ds0_gyro_init_interrupt(struct device *dev)
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{
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const struct lsm9ds0_gyro_config * const config =
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dev->config_info;
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struct lsm9ds0_gyro_data *data = dev->driver_data;
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k_sem_init(&data->sem, 0, UINT_MAX);
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k_thread_create(&data->thread, data->thread_stack,
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CONFIG_LSM9DS0_GYRO_THREAD_STACK_SIZE,
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lsm9ds0_gyro_thread_main, dev, NULL, NULL,
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K_PRIO_COOP(10), 0, K_NO_WAIT);
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data->gpio_drdy = device_get_binding(config->gpio_drdy_dev_name);
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if (!data->gpio_drdy) {
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LOG_DBG("gpio controller %s not found",
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config->gpio_drdy_dev_name);
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return -EINVAL;
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}
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gpio_pin_configure(data->gpio_drdy, config->gpio_drdy_int_pin,
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GPIO_INPUT | config->gpio_drdy_int_flags);
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gpio_init_callback(&data->gpio_cb,
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lsm9ds0_gyro_gpio_drdy_callback,
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BIT(config->gpio_drdy_int_pin));
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if (gpio_add_callback(data->gpio_drdy, &data->gpio_cb) < 0) {
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LOG_DBG("failed to set gpio callback");
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return -EINVAL;
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}
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return 0;
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}
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