126 lines
4.5 KiB
C
126 lines
4.5 KiB
C
/*
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* Copyright 2024 Kelly Helmut Lord
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define DT_DRV_COMPAT zephyr_input_double_tap
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#include <zephyr/device.h>
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#include <zephyr/input/input.h>
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#include <zephyr/kernel.h>
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#include <zephyr/logging/log.h>
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LOG_MODULE_REGISTER(input_double_tap, CONFIG_INPUT_LOG_LEVEL);
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struct double_tap_config {
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const struct device *input_dev;
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struct double_tap_data_entry *entries;
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const uint16_t *input_codes;
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const uint16_t *double_tap_codes;
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uint32_t double_tap_delay_ms;
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uint8_t num_codes;
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};
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struct double_tap_data_entry {
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const struct device *dev;
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struct k_work_delayable work;
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uint8_t index;
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bool first_tap;
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};
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static void double_tap_deferred(struct k_work *work)
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{
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struct k_work_delayable *dwork = k_work_delayable_from_work(work);
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struct double_tap_data_entry *entry =
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CONTAINER_OF(dwork, struct double_tap_data_entry, work);
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entry->first_tap = false;
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}
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static void double_tap_cb(struct input_event *evt, void *user_data)
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{
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const struct device *dev = user_data;
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const struct double_tap_config *cfg = dev->config;
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struct double_tap_data_entry *entry;
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int i;
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if (evt->type != INPUT_EV_KEY) {
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return;
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}
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for (i = 0; i < cfg->num_codes; i++) {
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if (evt->code == cfg->input_codes[i]) {
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break;
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}
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}
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if (i == cfg->num_codes) {
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LOG_DBG("ignored code %d", evt->code);
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return;
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}
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entry = &cfg->entries[i];
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if (evt->value) {
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if (entry->first_tap) {
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k_work_cancel_delayable(&entry->work);
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input_report_key(dev, cfg->double_tap_codes[i], 1, true, K_FOREVER);
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input_report_key(dev, cfg->double_tap_codes[i], 0, true, K_FOREVER);
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entry->first_tap = false;
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} else {
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entry->first_tap = true;
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k_work_schedule(&entry->work, K_MSEC(cfg->double_tap_delay_ms));
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}
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}
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}
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static int double_tap_init(const struct device *dev)
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{
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const struct double_tap_config *cfg = dev->config;
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if (cfg->input_dev && !device_is_ready(cfg->input_dev)) {
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LOG_ERR("input device not ready");
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return -ENODEV;
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}
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for (int i = 0; i < cfg->num_codes; i++) {
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struct double_tap_data_entry *entry = &cfg->entries[i];
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entry->dev = dev;
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entry->index = i;
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entry->first_tap = false;
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k_work_init_delayable(&entry->work, double_tap_deferred);
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}
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return 0;
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}
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#define INPUT_DOUBLE_TAP_DEFINE(inst) \
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BUILD_ASSERT(DT_INST_PROP_LEN(inst, input_codes) == \
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DT_INST_PROP_LEN(inst, double_tap_codes)); \
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\
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INPUT_CALLBACK_DEFINE_NAMED(DEVICE_DT_GET_OR_NULL(DT_INST_PHANDLE(inst, input)), \
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double_tap_cb, (void *)DEVICE_DT_INST_GET(inst), \
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double_tap_cb_##inst); \
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\
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static const uint16_t double_tap_input_codes_##inst[] = DT_INST_PROP(inst, input_codes); \
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\
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static const uint16_t double_tap_codes_##inst[] = DT_INST_PROP(inst, double_tap_codes); \
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\
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static struct double_tap_data_entry \
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double_tap_data_entries_##inst[DT_INST_PROP_LEN(inst, input_codes)]; \
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\
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static const struct double_tap_config double_tap_config_##inst = { \
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.input_dev = DEVICE_DT_GET_OR_NULL(DT_INST_PHANDLE(inst, input)), \
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.entries = double_tap_data_entries_##inst, \
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.input_codes = double_tap_input_codes_##inst, \
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.double_tap_codes = double_tap_codes_##inst, \
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.num_codes = DT_INST_PROP_LEN(inst, input_codes), \
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.double_tap_delay_ms = DT_INST_PROP(inst, double_tap_delay_ms), \
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}; \
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\
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DEVICE_DT_INST_DEFINE(inst, double_tap_init, NULL, NULL, &double_tap_config_##inst, \
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POST_KERNEL, CONFIG_INPUT_INIT_PRIORITY, NULL);
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DT_INST_FOREACH_STATUS_OKAY(INPUT_DOUBLE_TAP_DEFINE)
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