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/*
* Copyright (c) 2020 The ZMK Contributors
*
* SPDX-License-Identifier: MIT
*/
#define DT_DRV_COMPAT zmk_kscan_composite
#include <zephyr/device.h>
#include <zephyr/pm/device.h>
#include <zephyr/drivers/kscan.h>
#include <zephyr/logging/log.h>
LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
#define MATRIX_NODE_ID DT_DRV_INST(0)
#define MATRIX_ROWS DT_PROP(MATRIX_NODE_ID, rows)
#define MATRIX_COLS DT_PROP(MATRIX_NODE_ID, columns)
struct kscan_composite_child_config {
const struct device *child;
uint8_t row_offset;
uint8_t column_offset;
};
#define CHILD_CONFIG(inst) \
{.child = DEVICE_DT_GET(DT_PHANDLE(inst, kscan)), \
.row_offset = DT_PROP(inst, row_offset), \
.column_offset = DT_PROP_OR(inst, col_offset, DT_PROP(inst, column_offset))},
struct kscan_composite_config {
const struct kscan_composite_child_config *children;
size_t children_len;
};
struct kscan_composite_data {
kscan_callback_t callback;
const struct device *dev;
};
static int kscan_composite_enable_callback(const struct device *dev) {
const struct kscan_composite_config *cfg = dev->config;
for (int i = 0; i < cfg->children_len; i++) {
const struct kscan_composite_child_config *child_cfg = &cfg->children[i];
#if IS_ENABLED(CONFIG_PM_DEVICE_RUNTIME)
if (!pm_device_runtime_is_enabled(dev) && pm_device_runtime_is_enabled(child_cfg->child)) {
pm_device_runtime_get(child_cfg->child);
}
#elif IS_ENABLED(CONFIG_PM_DEVICE)
pm_device_action_run(child_cfg->child, PM_DEVICE_ACTION_RESUME);
#endif // IS_ENABLED(CONFIG_PM_DEVICE)
kscan_enable_callback(child_cfg->child);
}
return 0;
}
static int kscan_composite_disable_callback(const struct device *dev) {
const struct kscan_composite_config *cfg = dev->config;
for (int i = 0; i < cfg->children_len; i++) {
const struct kscan_composite_child_config *child_cfg = &cfg->children[i];
kscan_disable_callback(child_cfg->child);
#if IS_ENABLED(CONFIG_PM_DEVICE_RUNTIME)
if (!pm_device_runtime_is_enabled(dev) && pm_device_runtime_is_enabled(child_cfg->child)) {
pm_device_runtime_put(child_cfg->child);
}
#elif IS_ENABLED(CONFIG_PM_DEVICE)
pm_device_action_run(child_cfg->child, PM_DEVICE_ACTION_SUSPEND);
#endif // IS_ENABLED(CONFIG_PM_DEVICE)
}
return 0;
}
#define KSCAN_COMP_INST_DEV(n) DEVICE_DT_GET(DT_DRV_INST(n)),
static const struct device *all_instances[] = {DT_INST_FOREACH_STATUS_OKAY(KSCAN_COMP_INST_DEV)};
static void kscan_composite_child_callback(const struct device *child_dev, uint32_t row,
uint32_t column, bool pressed) {
// TODO: Ideally we can get this passed into our callback!
for (int i = 0; i < ARRAY_SIZE(all_instances); i++) {
const struct device *dev = all_instances[i];
const struct kscan_composite_config *cfg = dev->config;
struct kscan_composite_data *data = dev->data;
for (int c = 0; c < cfg->children_len; c++) {
const struct kscan_composite_child_config *child_cfg = &cfg->children[c];
if (child_cfg->child != child_dev) {
continue;
}
data->callback(dev, row + child_cfg->row_offset, column + child_cfg->column_offset,
pressed);
}
}
}
static int kscan_composite_configure(const struct device *dev, kscan_callback_t callback) {
const struct kscan_composite_config *cfg = dev->config;
struct kscan_composite_data *data = dev->data;
if (!callback) {
return -EINVAL;
}
for (int i = 0; i < cfg->children_len; i++) {
const struct kscan_composite_child_config *child_cfg = &cfg->children[i];
kscan_config(child_cfg->child, &kscan_composite_child_callback);
}
data->callback = callback;
return 0;
}
static int kscan_composite_init(const struct device *dev) {
struct kscan_composite_data *data = dev->data;
data->dev = dev;
#if IS_ENABLED(CONFIG_PM_DEVICE)
pm_device_init_suspended(dev);
#endif
return 0;
}
static const struct kscan_driver_api mock_driver_api = {
.config = kscan_composite_configure,
.enable_callback = kscan_composite_enable_callback,
.disable_callback = kscan_composite_disable_callback,
};
#if IS_ENABLED(CONFIG_PM_DEVICE)
static int kscan_composite_pm_action(const struct device *dev, enum pm_device_action action) {
switch (action) {
case PM_DEVICE_ACTION_SUSPEND:
return kscan_composite_disable_callback(dev);
case PM_DEVICE_ACTION_RESUME:
return kscan_composite_enable_callback(dev);
default:
return -ENOTSUP;
}
}
#endif // IS_ENABLED(CONFIG_PM_DEVICE)
#define KSCAN_COMP_DEV(n) \
static const struct kscan_composite_child_config kscan_composite_children_##n[] = { \
DT_INST_FOREACH_CHILD(n, CHILD_CONFIG)}; \
static const struct kscan_composite_config kscan_composite_config_##n = { \
.children = kscan_composite_children_##n, \
.children_len = ARRAY_SIZE(kscan_composite_children_##n), \
}; \
static struct kscan_composite_data kscan_composite_data_##n; \
PM_DEVICE_DT_INST_DEFINE(n, kscan_composite_pm_action); \
DEVICE_DT_INST_DEFINE(n, kscan_composite_init, PM_DEVICE_DT_INST_GET(n), \
&kscan_composite_data_##n, &kscan_composite_config_##n, POST_KERNEL, \
CONFIG_ZMK_KSCAN_COMPOSITE_INIT_PRIORITY, &mock_driver_api);
DT_INST_FOREACH_STATUS_OKAY(KSCAN_COMP_DEV)
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