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/*
* Copyright (c) 2020 The ZMK Contributors
*
* SPDX-License-Identifier: MIT
*/
#include <zephyr/device.h>
#include <zephyr/init.h>
#include <zephyr/usb/usb_device.h>
#include <zephyr/usb/class/usb_hid.h>
#include <zmk/hid.h>
#include <zmk/keymap.h>
#include <zmk/event_manager.h>
#include <zmk/events/usb_conn_state_changed.h>
#include <zmk/usb_hid.h>
LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
static enum usb_dc_status_code usb_status = USB_DC_UNKNOWN;
static bool is_configured;
static void raise_usb_status_changed_event(struct k_work *_work) {
raise_zmk_usb_conn_state_changed(
(struct zmk_usb_conn_state_changed){.conn_state = zmk_usb_get_conn_state()});
}
K_WORK_DEFINE(usb_status_notifier_work, raise_usb_status_changed_event);
enum usb_dc_status_code zmk_usb_get_status(void) { return usb_status; }
enum zmk_usb_conn_state zmk_usb_get_conn_state(void) {
LOG_DBG("state: %d", usb_status);
switch (usb_status) {
case USB_DC_SUSPEND:
case USB_DC_CONFIGURED:
case USB_DC_RESUME:
case USB_DC_CLEAR_HALT:
case USB_DC_SOF:
return ZMK_USB_CONN_HID;
case USB_DC_DISCONNECTED:
case USB_DC_UNKNOWN:
return ZMK_USB_CONN_NONE;
default:
return ZMK_USB_CONN_POWERED;
}
}
bool zmk_usb_is_hid_ready(void) {
return zmk_usb_get_conn_state() == ZMK_USB_CONN_HID && is_configured;
}
void usb_status_cb(enum usb_dc_status_code status, const uint8_t *params) {
// Start-of-frame events are too frequent and noisy to notify, and they're
// not used within ZMK
if (status == USB_DC_SOF) {
return;
}
#if IS_ENABLED(CONFIG_ZMK_USB_BOOT)
if (status == USB_DC_RESET) {
zmk_usb_hid_set_protocol(HID_PROTOCOL_REPORT);
}
#endif
usb_status = status;
if (zmk_usb_get_conn_state() == ZMK_USB_CONN_HID) {
is_configured |= usb_status == USB_DC_CONFIGURED;
} else {
is_configured = false;
}
k_work_submit(&usb_status_notifier_work);
};
static int zmk_usb_init(void) {
int usb_enable_ret;
usb_enable_ret = usb_enable(usb_status_cb);
if (usb_enable_ret != 0) {
LOG_ERR("Unable to enable USB");
return -EINVAL;
}
return 0;
}
SYS_INIT(zmk_usb_init, APPLICATION, CONFIG_ZMK_USB_INIT_PRIORITY);
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