blob: 76df309b96b5933cd8aa9b09a21d30e4f40b59a1 [file] [log] [blame]
/*
* Copyright 2023 Google LLC
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT zephyr_kscan_input
#include <zephyr/drivers/kscan.h>
#include <zephyr/input/input.h>
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(kscan_input, CONFIG_KSCAN_LOG_LEVEL);
struct kscan_input_config {
const struct device *input_dev;
};
struct kscan_input_data {
bool enabled;
kscan_callback_t callback;
int row;
int col;
bool pressed;
};
static void kscan_input_cb(const struct device *dev, struct input_event *evt)
{
struct kscan_input_data *data = dev->data;
switch (evt->code) {
case INPUT_ABS_X:
data->col = evt->value;
break;
case INPUT_ABS_Y:
data->row = evt->value;
break;
case INPUT_BTN_TOUCH:
data->pressed = evt->value;
break;
}
if (evt->sync) {
LOG_DBG("input event: %3d %3d %d",
data->row, data->col, data->pressed);
if (data->callback) {
data->callback(dev, data->row, data->col, data->pressed);
}
}
}
static int kscan_input_configure(const struct device *dev,
kscan_callback_t callback)
{
struct kscan_input_data *data = dev->data;
if (!callback) {
LOG_ERR("Invalid callback (NULL)");
return -EINVAL;
}
data->callback = callback;
return 0;
}
static int kscan_input_enable_callback(const struct device *dev)
{
struct kscan_input_data *data = dev->data;
data->enabled = true;
return 0;
}
static int kscan_input_disable_callback(const struct device *dev)
{
struct kscan_input_data *data = dev->data;
data->enabled = false;
return 0;
}
static int kscan_input_init(const struct device *dev)
{
const struct kscan_input_config *cfg = dev->config;
if (!device_is_ready(cfg->input_dev)) {
LOG_ERR("Input device not ready");
return -ENODEV;
}
return 0;
}
static const struct kscan_driver_api kscan_input_driver_api = {
.config = kscan_input_configure,
.enable_callback = kscan_input_enable_callback,
.disable_callback = kscan_input_disable_callback,
};
#define KSCAN_INPUT_INIT(index) \
static void kscan_input_cb_##index(struct input_event *evt) \
{ \
kscan_input_cb(DEVICE_DT_GET(DT_INST(index, DT_DRV_COMPAT)), \
evt); \
} \
INPUT_CALLBACK_DEFINE(DEVICE_DT_GET(DT_INST_PARENT(index)), \
kscan_input_cb_##index); \
static const struct kscan_input_config kscan_input_config_##index = { \
.input_dev = DEVICE_DT_GET(DT_INST_PARENT(index)), \
}; \
static struct kscan_input_data kscan_input_data_##index; \
DEVICE_DT_INST_DEFINE(index, kscan_input_init, NULL, \
&kscan_input_data_##index, \
&kscan_input_config_##index, \
POST_KERNEL, CONFIG_KSCAN_INIT_PRIORITY, \
&kscan_input_driver_api);
DT_INST_FOREACH_STATUS_OKAY(KSCAN_INPUT_INIT)