| /* |
| * Copyright (c) 2017 Intel Corporation |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include "lis2dh.h" |
| |
| #include <misc/util.h> |
| #include <kernel.h> |
| |
| #define START_TRIG_INT1 BIT(0) |
| #define START_TRIG_INT2 BIT(1) |
| #define TRIGGED_INT1 BIT(4) |
| #define TRIGGED_INT2 BIT(5) |
| |
| static int lis2dh_trigger_drdy_set(struct device *dev, enum sensor_channel chan, |
| sensor_trigger_handler_t handler) |
| { |
| struct lis2dh_data *lis2dh = dev->driver_data; |
| int status; |
| |
| gpio_pin_disable_callback(lis2dh->gpio, CONFIG_LIS2DH_INT1_GPIO_PIN); |
| |
| /* cancel potentially pending trigger */ |
| atomic_clear_bit(&lis2dh->trig_flags, TRIGGED_INT1); |
| |
| status = lis2dh_reg_field_update(lis2dh->bus, LIS2DH_REG_CTRL3, |
| LIS2DH_EN_DRDY1_INT1_SHIFT, |
| LIS2DH_EN_DRDY1_INT1, 0); |
| |
| lis2dh->handler_drdy = handler; |
| if ((handler == NULL) || (status < 0)) { |
| return status; |
| } |
| |
| lis2dh->chan_drdy = chan; |
| |
| /* serialize start of int1 in thread to synchronize output sampling |
| * and first interrupt. this avoids concurrent bus context access. |
| */ |
| atomic_set_bit(&lis2dh->trig_flags, START_TRIG_INT1); |
| #if defined(CONFIG_LIS2DH_TRIGGER_OWN_THREAD) |
| k_sem_give(&lis2dh->gpio_sem); |
| #elif defined(CONFIG_LIS2DH_TRIGGER_GLOBAL_THREAD) |
| k_work_submit(&lis2dh->work); |
| #endif |
| |
| return 0; |
| } |
| |
| static int lis2dh_start_trigger_int1(const struct lis2dh_data *lis2dh) |
| { |
| int status; |
| u8_t raw[LIS2DH_BUF_SZ]; |
| u8_t ctrl1 = 0; |
| |
| /* power down temporarly to align interrupt & data output sampling */ |
| status = lis2dh_reg_read_byte(lis2dh->bus, LIS2DH_REG_CTRL1, &ctrl1); |
| if (unlikely(status < 0)) { |
| return status; |
| } |
| status = lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_CTRL1, |
| ctrl1 & ~LIS2DH_ODR_MASK); |
| if (unlikely(status < 0)) { |
| return status; |
| } |
| |
| SYS_LOG_DBG("ctrl1=0x%x @tick=%u", ctrl1, k_cycle_get_32()); |
| |
| /* empty output data */ |
| status = lis2dh_burst_read(lis2dh->bus, LIS2DH_REG_STATUS, raw, |
| sizeof(raw)); |
| if (unlikely(status < 0)) { |
| return status; |
| } |
| |
| gpio_pin_enable_callback(lis2dh->gpio, CONFIG_LIS2DH_INT1_GPIO_PIN); |
| |
| /* re-enable output sampling */ |
| status = lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_CTRL1, ctrl1); |
| if (unlikely(status < 0)) { |
| return status; |
| } |
| |
| return lis2dh_reg_field_update(lis2dh->bus, LIS2DH_REG_CTRL3, |
| LIS2DH_EN_DRDY1_INT1_SHIFT, |
| LIS2DH_EN_DRDY1_INT1, 1); |
| } |
| |
| #define LIS2DH_ANYM_CFG (LIS2DH_INT_CFG_ZHIE_ZUPE | LIS2DH_INT_CFG_YHIE_YUPE |\ |
| LIS2DH_INT_CFG_XHIE_XUPE) |
| |
| static int lis2dh_trigger_anym_set(struct device *dev, |
| sensor_trigger_handler_t handler) |
| { |
| struct lis2dh_data *lis2dh = dev->driver_data; |
| int status; |
| u8_t reg_val; |
| |
| gpio_pin_disable_callback(lis2dh->gpio, CONFIG_LIS2DH_INT2_GPIO_PIN); |
| |
| /* cancel potentially pending trigger */ |
| atomic_clear_bit(&lis2dh->trig_flags, TRIGGED_INT2); |
| |
| /* disable all interrupt 2 events */ |
| status = lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_INT2_CFG, 0); |
| |
| /* make sure any pending interrupt is cleared */ |
| status = lis2dh_reg_read_byte(lis2dh->bus, LIS2DH_REG_INT2_SRC, |
| ®_val); |
| |
| lis2dh->handler_anymotion = handler; |
| if ((handler == NULL) || (status < 0)) { |
| return status; |
| } |
| |
| /* serialize start of int2 in thread to synchronize output sampling |
| * and first interrupt. this avoids concurrent bus context access. |
| */ |
| atomic_set_bit(&lis2dh->trig_flags, START_TRIG_INT2); |
| #if defined(CONFIG_LIS2DH_TRIGGER_OWN_THREAD) |
| k_sem_give(&lis2dh->gpio_sem); |
| #elif defined(CONFIG_LIS2DH_TRIGGER_GLOBAL_THREAD) |
| k_work_submit(&lis2dh->work); |
| #endif |
| return 0; |
| } |
| |
| static int lis2dh_start_trigger_int2(const struct lis2dh_data *lis2dh) |
| { |
| int status; |
| |
| status = gpio_pin_enable_callback(lis2dh->gpio, |
| CONFIG_LIS2DH_INT2_GPIO_PIN); |
| if (unlikely(status < 0)) { |
| SYS_LOG_ERR("enable callback failed err=%d", status); |
| } |
| |
| return lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_INT2_CFG, |
| LIS2DH_ANYM_CFG); |
| } |
| |
| int lis2dh_trigger_set(struct device *dev, |
| const struct sensor_trigger *trig, |
| sensor_trigger_handler_t handler) |
| { |
| if (trig->type == SENSOR_TRIG_DATA_READY && |
| trig->chan == SENSOR_CHAN_ACCEL_XYZ) { |
| return lis2dh_trigger_drdy_set(dev, trig->chan, handler); |
| } else if (trig->type == SENSOR_TRIG_DELTA) { |
| return lis2dh_trigger_anym_set(dev, handler); |
| } |
| |
| return -ENOTSUP; |
| } |
| |
| int lis2dh_acc_slope_config(struct device *dev, enum sensor_attribute attr, |
| const struct sensor_value *val) |
| { |
| struct lis2dh_data *lis2dh = dev->driver_data; |
| int status; |
| |
| if (attr == SENSOR_ATTR_SLOPE_TH) { |
| u8_t range_g, reg_val; |
| u32_t slope_th_ums2; |
| |
| status = lis2dh_reg_read_byte(lis2dh->bus, LIS2DH_REG_CTRL4, |
| ®_val); |
| if (status < 0) { |
| return status; |
| } |
| |
| /* fs reg value is in the range 0 (2g) - 3 (16g) */ |
| range_g = 2 * (1 << ((LIS2DH_FS_MASK & reg_val) |
| >> LIS2DH_FS_SHIFT)); |
| |
| slope_th_ums2 = val->val1 * 1000000 + val->val2; |
| |
| /* make sure the provided threshold does not exceed range */ |
| if ((slope_th_ums2 - 1) > (range_g * SENSOR_G)) { |
| return -EINVAL; |
| } |
| |
| /* 7 bit full range value */ |
| reg_val = 128 / range_g * (slope_th_ums2 - 1) / SENSOR_G; |
| |
| SYS_LOG_INF("int2_ths=0x%x range_g=%d ums2=%u", reg_val, |
| range_g, slope_th_ums2 - 1); |
| |
| status = lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_INT2_THS, |
| reg_val); |
| } else { /* SENSOR_ATTR_SLOPE_DUR */ |
| /* |
| * slope duration is measured in number of samples: |
| * N/ODR where N is the register value |
| */ |
| if (val->val1 < 0 || val->val1 > 127) { |
| return -ENOTSUP; |
| } |
| |
| SYS_LOG_INF("int2_dur=0x%x", val->val1); |
| |
| status = lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_INT2_DUR, |
| val->val1); |
| } |
| |
| return status; |
| } |
| |
| static void lis2dh_gpio_int1_callback(struct device *dev, |
| struct gpio_callback *cb, u32_t pins) |
| { |
| struct lis2dh_data *lis2dh = |
| CONTAINER_OF(cb, struct lis2dh_data, gpio_int1_cb); |
| |
| ARG_UNUSED(pins); |
| |
| atomic_set_bit(&lis2dh->trig_flags, TRIGGED_INT1); |
| |
| #if defined(CONFIG_LIS2DH_TRIGGER_OWN_THREAD) |
| k_sem_give(&lis2dh->gpio_sem); |
| #elif defined(CONFIG_LIS2DH_TRIGGER_GLOBAL_THREAD) |
| k_work_submit(&lis2dh->work); |
| #endif |
| } |
| |
| static void lis2dh_gpio_int2_callback(struct device *dev, |
| struct gpio_callback *cb, u32_t pins) |
| { |
| struct lis2dh_data *lis2dh = |
| CONTAINER_OF(cb, struct lis2dh_data, gpio_int2_cb); |
| |
| ARG_UNUSED(pins); |
| |
| atomic_set_bit(&lis2dh->trig_flags, TRIGGED_INT2); |
| |
| #if defined(CONFIG_LIS2DH_TRIGGER_OWN_THREAD) |
| k_sem_give(&lis2dh->gpio_sem); |
| #elif defined(CONFIG_LIS2DH_TRIGGER_GLOBAL_THREAD) |
| k_work_submit(&lis2dh->work); |
| #endif |
| } |
| |
| static void lis2dh_thread_cb(void *arg) |
| { |
| struct device *dev = arg; |
| struct lis2dh_data *lis2dh = dev->driver_data; |
| |
| if (unlikely(atomic_test_and_clear_bit(&lis2dh->trig_flags, |
| START_TRIG_INT1))) { |
| int status = lis2dh_start_trigger_int1(lis2dh); |
| |
| if (unlikely(status < 0)) { |
| SYS_LOG_ERR("lis2dh_start_trigger_int1: %d", status); |
| } |
| return; |
| } |
| |
| if (unlikely(atomic_test_and_clear_bit(&lis2dh->trig_flags, |
| START_TRIG_INT2))) { |
| int status = lis2dh_start_trigger_int2(lis2dh); |
| |
| if (unlikely(status < 0)) { |
| SYS_LOG_ERR("lis2dh_start_trigger_int2: %d", status); |
| } |
| return; |
| } |
| |
| if (atomic_test_and_clear_bit(&lis2dh->trig_flags, |
| TRIGGED_INT1)) { |
| struct sensor_trigger drdy_trigger = { |
| .type = SENSOR_TRIG_DATA_READY, |
| .chan = lis2dh->chan_drdy, |
| }; |
| |
| if (likely(lis2dh->handler_drdy != NULL)) { |
| lis2dh->handler_drdy(dev, &drdy_trigger); |
| } |
| |
| return; |
| } |
| |
| if (atomic_test_and_clear_bit(&lis2dh->trig_flags, |
| TRIGGED_INT2)) { |
| struct sensor_trigger anym_trigger = { |
| .type = SENSOR_TRIG_DELTA, |
| .chan = lis2dh->chan_drdy, |
| }; |
| u8_t reg_val; |
| |
| /* clear interrupt 2 to de-assert int2 line */ |
| lis2dh_reg_read_byte(lis2dh->bus, LIS2DH_REG_INT2_SRC, |
| ®_val); |
| |
| if (likely(lis2dh->handler_anymotion != NULL)) { |
| lis2dh->handler_anymotion(dev, &anym_trigger); |
| } |
| |
| SYS_LOG_DBG("@tick=%u int2_src=0x%x", k_cycle_get_32(), |
| reg_val); |
| |
| return; |
| } |
| } |
| |
| #ifdef CONFIG_LIS2DH_TRIGGER_OWN_THREAD |
| static void lis2dh_thread(void *arg1, void *unused2, void *unused3) |
| { |
| struct device *dev = arg1; |
| struct lis2dh_data *lis2dh = dev->driver_data; |
| |
| ARG_UNUSED(unused2); |
| ARG_UNUSED(unused3); |
| |
| while (1) { |
| k_sem_take(&lis2dh->gpio_sem, K_FOREVER); |
| lis2dh_thread_cb(dev); |
| } |
| } |
| #endif |
| |
| #ifdef CONFIG_LIS2DH_TRIGGER_GLOBAL_THREAD |
| static void lis2dh_work_cb(struct k_work *work) |
| { |
| struct lis2dh_data *lis2dh = |
| CONTAINER_OF(work, struct lis2dh_data, work); |
| |
| lis2dh_thread_cb(lis2dh->dev); |
| } |
| #endif |
| |
| #define LIS2DH_INT1_CFG (GPIO_DIR_IN | GPIO_INT |\ |
| GPIO_INT_EDGE | GPIO_INT_ACTIVE_HIGH) |
| |
| #define LIS2DH_INT2_CFG (GPIO_DIR_IN | GPIO_INT |\ |
| GPIO_INT_EDGE | GPIO_INT_ACTIVE_HIGH) |
| |
| int lis2dh_init_interrupt(struct device *dev) |
| { |
| struct lis2dh_data *lis2dh = dev->driver_data; |
| int status; |
| u8_t raw[LIS2DH_DATA_OFS + 2]; |
| |
| /* setup data ready gpio interrupt */ |
| lis2dh->gpio = device_get_binding(CONFIG_LIS2DH_GPIO_DEV_NAME); |
| if (lis2dh->gpio == NULL) { |
| SYS_LOG_ERR("Cannot get pointer to %s device", |
| CONFIG_LIS2DH_GPIO_DEV_NAME); |
| return -EINVAL; |
| } |
| |
| /* data ready int1 gpio configuration */ |
| status = gpio_pin_configure(lis2dh->gpio, CONFIG_LIS2DH_INT1_GPIO_PIN, |
| LIS2DH_INT1_CFG); |
| if (status < 0) { |
| SYS_LOG_ERR("Could not configure gpio %d", |
| CONFIG_LIS2DH_INT1_GPIO_PIN); |
| return status; |
| } |
| |
| gpio_init_callback(&lis2dh->gpio_int1_cb, |
| lis2dh_gpio_int1_callback, |
| BIT(CONFIG_LIS2DH_INT1_GPIO_PIN)); |
| |
| status = gpio_add_callback(lis2dh->gpio, &lis2dh->gpio_int1_cb); |
| if (status < 0) { |
| SYS_LOG_ERR("Could not add gpio int1 callback"); |
| return status; |
| } |
| |
| /* any motion int2 gpio configuration */ |
| status = gpio_pin_configure(lis2dh->gpio, CONFIG_LIS2DH_INT2_GPIO_PIN, |
| LIS2DH_INT2_CFG); |
| if (status < 0) { |
| SYS_LOG_ERR("Could not configure gpio %d", |
| CONFIG_LIS2DH_INT2_GPIO_PIN); |
| return status; |
| } |
| |
| gpio_init_callback(&lis2dh->gpio_int2_cb, |
| lis2dh_gpio_int2_callback, |
| BIT(CONFIG_LIS2DH_INT2_GPIO_PIN)); |
| |
| /* callback is going to be enabled by trigger setting function */ |
| status = gpio_add_callback(lis2dh->gpio, &lis2dh->gpio_int2_cb); |
| if (status < 0) { |
| SYS_LOG_ERR("Could not add gpio int2 callback (%d)", status); |
| return status; |
| } |
| |
| #if defined(CONFIG_LIS2DH_TRIGGER_OWN_THREAD) |
| k_sem_init(&lis2dh->gpio_sem, 0, UINT_MAX); |
| |
| k_thread_create(&lis2dh->thread, lis2dh->thread_stack, |
| CONFIG_LIS2DH_THREAD_STACK_SIZE, |
| (k_thread_entry_t)lis2dh_thread, dev, NULL, NULL, |
| K_PRIO_COOP(CONFIG_LIS2DH_THREAD_PRIORITY), 0, 0); |
| #elif defined(CONFIG_LIS2DH_TRIGGER_GLOBAL_THREAD) |
| lis2dh->work.handler = lis2dh_work_cb; |
| lis2dh->dev = dev; |
| #endif |
| /* disable interrupt 2 in case of warm (re)boot */ |
| status = lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_INT2_CFG, 0); |
| if (status < 0) { |
| SYS_LOG_ERR("Interrupt 2 disable reg write failed (%d)", |
| status); |
| return status; |
| } |
| |
| memset(raw, 0, sizeof(raw)); |
| status = lis2dh_burst_write(lis2dh->bus, LIS2DH_REG_INT2_THS, raw, |
| sizeof(raw)); |
| if (status < 0) { |
| SYS_LOG_ERR("Burst write to INT2 THS failed (%d)", status); |
| return status; |
| } |
| |
| /* latch int2 line interrupt */ |
| status = lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_CTRL5, |
| LIS2DH_EN_LIR_INT2); |
| if (status < 0) { |
| SYS_LOG_ERR("INT2 latch enable reg write failed (%d)", status); |
| return status; |
| } |
| |
| SYS_LOG_INF("int1 on pin=%d cfg=0x%x, int2 on pin=%d cfg=0x%x", |
| CONFIG_LIS2DH_INT1_GPIO_PIN, LIS2DH_INT1_CFG, |
| CONFIG_LIS2DH_INT2_GPIO_PIN, LIS2DH_INT2_CFG); |
| |
| /* enable interrupt 2 on int2 line */ |
| return lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_CTRL6, |
| LIS2DH_EN_INT2_INT2); |
| } |