121 lines
3.0 KiB
C
121 lines
3.0 KiB
C
/*
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* Copyright 2023 Google LLC
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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_kscan_input
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#include <zephyr/drivers/kscan.h>
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#include <zephyr/input/input.h>
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#include <zephyr/logging/log.h>
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LOG_MODULE_REGISTER(kscan_input, CONFIG_KSCAN_LOG_LEVEL);
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struct kscan_input_config {
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const struct device *input_dev;
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};
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struct kscan_input_data {
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bool enabled;
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kscan_callback_t callback;
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int row;
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int col;
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bool pressed;
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};
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static void kscan_input_cb(const struct device *dev, struct input_event *evt)
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{
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struct kscan_input_data *data = dev->data;
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switch (evt->code) {
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case INPUT_ABS_X:
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data->col = evt->value;
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break;
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case INPUT_ABS_Y:
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data->row = evt->value;
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break;
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case INPUT_BTN_TOUCH:
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data->pressed = evt->value;
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break;
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}
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if (evt->sync) {
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LOG_DBG("input event: %3d %3d %d",
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data->row, data->col, data->pressed);
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if (data->callback) {
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data->callback(dev, data->row, data->col, data->pressed);
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}
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}
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}
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static int kscan_input_configure(const struct device *dev,
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kscan_callback_t callback)
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{
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struct kscan_input_data *data = dev->data;
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if (!callback) {
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LOG_ERR("Invalid callback (NULL)");
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return -EINVAL;
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}
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data->callback = callback;
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return 0;
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}
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static int kscan_input_enable_callback(const struct device *dev)
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{
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struct kscan_input_data *data = dev->data;
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data->enabled = true;
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return 0;
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}
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static int kscan_input_disable_callback(const struct device *dev)
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{
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struct kscan_input_data *data = dev->data;
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data->enabled = false;
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return 0;
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}
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static int kscan_input_init(const struct device *dev)
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{
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const struct kscan_input_config *cfg = dev->config;
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if (!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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return 0;
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}
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static const struct kscan_driver_api kscan_input_driver_api = {
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.config = kscan_input_configure,
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.enable_callback = kscan_input_enable_callback,
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.disable_callback = kscan_input_disable_callback,
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};
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#define KSCAN_INPUT_INIT(index) \
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static void kscan_input_cb_##index(struct input_event *evt) \
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{ \
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kscan_input_cb(DEVICE_DT_GET(DT_INST(index, DT_DRV_COMPAT)), \
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evt); \
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} \
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INPUT_LISTENER_CB_DEFINE(DEVICE_DT_GET(DT_INST_PARENT(index)), \
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kscan_input_cb_##index); \
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static const struct kscan_input_config kscan_input_config_##index = { \
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.input_dev = DEVICE_DT_GET(DT_INST_PARENT(index)), \
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}; \
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static struct kscan_input_data kscan_input_data_##index; \
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DEVICE_DT_INST_DEFINE(index, kscan_input_init, NULL, \
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&kscan_input_data_##index, \
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&kscan_input_config_##index, \
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POST_KERNEL, CONFIG_KSCAN_INIT_PRIORITY, \
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&kscan_input_driver_api);
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DT_INST_FOREACH_STATUS_OKAY(KSCAN_INPUT_INIT)
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