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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 | /* 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 */ #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(struct device *dev, enum sensor_trigger_type type, int enable) { const struct lis2dw12_device_config *cfg = dev->config->config_info; struct lis2dw12_data *lis2dw12 = dev->driver_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_PULSE 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_PULSE */ 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(struct device *dev, const struct sensor_trigger *trig, sensor_trigger_handler_t handler) { struct lis2dw12_data *lis2dw12 = dev->driver_data; union axis3bit16_t raw; int state = (handler != NULL) ? PROPERTY_ENABLE : PROPERTY_DISABLE; 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.u8bit); } return lis2dw12_enable_int(dev, SENSOR_TRIG_DATA_READY, state); break; #ifdef CONFIG_LIS2DW12_PULSE 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_PULSE */ default: LOG_ERR("Unsupported sensor trigger"); return -ENOTSUP; } } static int lis2dw12_handle_drdy_int(struct device *dev) { struct lis2dw12_data *data = dev->driver_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_PULSE static int lis2dw12_handle_single_tap_int(struct device *dev) { struct lis2dw12_data *data = dev->driver_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(struct device *dev) { struct lis2dw12_data *data = dev->driver_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_PULSE */ /** * lis2dw12_handle_interrupt - handle the drdy event * read data and call handler if registered any */ static void lis2dw12_handle_interrupt(void *arg) { struct device *dev = (struct device *)arg; struct lis2dw12_data *lis2dw12 = dev->driver_data; const struct lis2dw12_device_config *cfg = dev->config->config_info; 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_PULSE 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_PULSE */ gpio_pin_interrupt_configure(lis2dw12->gpio, cfg->int_gpio_pin, GPIO_INT_EDGE_TO_ACTIVE); } static void lis2dw12_gpio_callback(struct device *dev, struct gpio_callback *cb, u32_t pins) { struct lis2dw12_data *lis2dw12 = CONTAINER_OF(cb, struct lis2dw12_data, gpio_cb); if ((pins & BIT(lis2dw12->gpio_pin)) == 0U) { return; } gpio_pin_interrupt_configure(dev, lis2dw12->gpio_pin, 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(int dev_ptr, int unused) { struct device *dev = INT_TO_POINTER(dev_ptr); struct lis2dw12_data *lis2dw12 = dev->driver_data; ARG_UNUSED(unused); while (1) { k_sem_take(&lis2dw12->gpio_sem, K_FOREVER); lis2dw12_handle_interrupt(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 */ int lis2dw12_init_interrupt(struct device *dev) { struct lis2dw12_data *lis2dw12 = dev->driver_data; const struct lis2dw12_device_config *cfg = dev->config->config_info; int ret; /* setup data ready gpio interrupt (INT1 or INT2) */ lis2dw12->gpio = device_get_binding(cfg->int_gpio_port); if (lis2dw12->gpio == NULL) { LOG_DBG("Cannot get pointer to %s device", cfg->int_gpio_port); return -EINVAL; } #if defined(CONFIG_LIS2DW12_TRIGGER_OWN_THREAD) k_sem_init(&lis2dw12->gpio_sem, 0, UINT_MAX); k_thread_create(&lis2dw12->thread, lis2dw12->thread_stack, CONFIG_LIS2DW12_THREAD_STACK_SIZE, (k_thread_entry_t)lis2dw12_thread, dev, 0, 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; lis2dw12->dev = dev; #endif /* CONFIG_LIS2DW12_TRIGGER_OWN_THREAD */ lis2dw12->gpio_pin = cfg->int_gpio_pin; ret = gpio_pin_configure(lis2dw12->gpio, cfg->int_gpio_pin, GPIO_INPUT | cfg->int_gpio_flags); if (ret < 0) { LOG_DBG("Could not configure gpio"); return ret; } gpio_init_callback(&lis2dw12->gpio_cb, lis2dw12_gpio_callback, BIT(cfg->int_gpio_pin)); if (gpio_add_callback(lis2dw12->gpio, &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; } return gpio_pin_interrupt_configure(lis2dw12->gpio, cfg->int_gpio_pin, GPIO_INT_EDGE_TO_ACTIVE); } |