blob: b7ce3c7c8d6da19c04325d5f9fc8ed30aed2c5a7 [file] [log] [blame]
/*
* Copyright 2023 Google LLC
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT zephyr_input_longpress
#include <zephyr/device.h>
#include <zephyr/input/input.h>
#include <zephyr/kernel.h>
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(input_longpress, CONFIG_INPUT_LOG_LEVEL);
struct longpress_config {
const struct device *input_dev;
struct longpress_data_entry *entries;
const uint16_t *input_codes;
const uint16_t *short_codes;
const uint16_t *long_codes;
uint32_t long_delays_ms;
uint8_t num_codes;
};
struct longpress_data_entry {
const struct device *dev;
struct k_work_delayable work;
uint8_t index;
bool long_fired;
};
static void longpress_deferred(struct k_work *work)
{
struct k_work_delayable *dwork = k_work_delayable_from_work(work);
struct longpress_data_entry *entry = CONTAINER_OF(
dwork, struct longpress_data_entry, work);
const struct device *dev = entry->dev;
const struct longpress_config *cfg = dev->config;
uint16_t code;
code = cfg->long_codes[entry->index];
input_report_key(dev, code, 1, true, K_FOREVER);
entry->long_fired = true;
}
static void longpress_cb(const struct device *dev, struct input_event *evt)
{
const struct longpress_config *cfg = dev->config;
struct longpress_data_entry *entry;
int i;
if (evt->type != INPUT_EV_KEY) {
return;
}
for (i = 0; i < cfg->num_codes; i++) {
if (evt->code == cfg->input_codes[i]) {
break;
}
}
if (i == cfg->num_codes) {
LOG_DBG("ignored code %d", evt->code);
return;
}
entry = &cfg->entries[i];
if (evt->value) {
entry->long_fired = false;
k_work_schedule(&entry->work, K_MSEC(cfg->long_delays_ms));
} else {
k_work_cancel_delayable(&entry->work);
if (entry->long_fired) {
input_report_key(dev, cfg->long_codes[i], 0, true, K_FOREVER);
} else if (cfg->short_codes != NULL) {
input_report_key(dev, cfg->short_codes[i], 1, true, K_FOREVER);
input_report_key(dev, cfg->short_codes[i], 0, true, K_FOREVER);
}
}
}
static int longpress_init(const struct device *dev)
{
const struct longpress_config *cfg = dev->config;
if (cfg->input_dev && !device_is_ready(cfg->input_dev)) {
LOG_ERR("input device not ready");
return -ENODEV;
}
for (int i = 0; i < cfg->num_codes; i++) {
struct longpress_data_entry *entry = &cfg->entries[i];
entry->dev = dev;
entry->index = i;
k_work_init_delayable(&entry->work, longpress_deferred);
}
return 0;
}
#define INPUT_LONGPRESS_DEFINE(inst) \
BUILD_ASSERT((DT_INST_PROP_LEN(inst, input_codes) == \
DT_INST_PROP_LEN_OR(inst, short_codes, 0)) || \
!DT_INST_NODE_HAS_PROP(inst, short_codes)); \
BUILD_ASSERT(DT_INST_PROP_LEN(inst, input_codes) == DT_INST_PROP_LEN(inst, long_codes)); \
\
static void longpress_cb_##inst(struct input_event *evt) \
{ \
longpress_cb(DEVICE_DT_INST_GET(inst), evt); \
} \
INPUT_CALLBACK_DEFINE(DEVICE_DT_GET_OR_NULL(DT_INST_PHANDLE(inst, input)), \
longpress_cb_##inst); \
\
static const uint16_t longpress_input_codes_##inst[] = DT_INST_PROP(inst, input_codes); \
\
IF_ENABLED(DT_INST_NODE_HAS_PROP(inst, short_codes), ( \
static const uint16_t longpress_short_codes_##inst[] = DT_INST_PROP(inst, short_codes); \
)); \
\
static const uint16_t longpress_long_codes_##inst[] = DT_INST_PROP(inst, long_codes); \
\
static struct longpress_data_entry longpress_data_entries_##inst[DT_INST_PROP_LEN( \
inst, input_codes)]; \
\
static const struct longpress_config longpress_config_##inst = { \
.input_dev = DEVICE_DT_GET_OR_NULL(DT_INST_PHANDLE(inst, input)), \
.entries = longpress_data_entries_##inst, \
.input_codes = longpress_input_codes_##inst, \
IF_ENABLED(DT_INST_NODE_HAS_PROP(inst, short_codes), ( \
.short_codes = longpress_short_codes_##inst, \
)) \
.long_codes = longpress_long_codes_##inst, \
.num_codes = DT_INST_PROP_LEN(inst, input_codes), \
.long_delays_ms = DT_INST_PROP(inst, long_delay_ms), \
}; \
\
DEVICE_DT_INST_DEFINE(inst, longpress_init, NULL, \
NULL, &longpress_config_##inst, \
POST_KERNEL, CONFIG_INPUT_INIT_PRIORITY, NULL);
DT_INST_FOREACH_STATUS_OKAY(INPUT_LONGPRESS_DEFINE)