usb: host: add host status to the host context

Add a "struct usbh_status" that contains a bitmask of flags to keep
track of the global state of the host context, like done for the
device_next implementation. Add helpers to check the status.

Signed-off-by: Josuah Demangeon <[email protected]>

Author: Josuah Demangeon

include/zephyr/usb/usbh.h

@@ -33,6 +33,14 @@ extern "C" {
  * @{
  */
 
+/**
+ * USB host support status
+ */
+struct usbh_status {
+	/** USB host support is initialized */
+	unsigned int initialized : 1;
+};
+
 /**
  * USB host support runtime context
  */
@@ -43,6 +51,8 @@ struct usbh_context {
 	struct k_mutex mutex;
 	/** Pointer to UHC device struct */
 	const struct device *dev;
+	/** Status of the USB host support */
+	struct usbh_status status;
 	/** USB device list */
 	sys_dlist_t udevs;
 	/** USB root device */

subsys/usb/host/usbh_host.h

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ZEPHYR_INCLUDE_USBH_HOST_H
+#define ZEPHYR_INCLUDE_USBH_HOST_H
+
+#include <stdbool.h>
+#include <zephyr/usb/usbh.h>
+
+/**
+ * @brief Check whether USB host is enabled
+ *
+ * @param[in] uhs_ctx Pointer to a host context
+ *
+ * @return true if USB host is in enabled, false otherwise
+ */
+static inline bool usbh_is_initialized(const struct usbh_context *const uhs_ctx)
+{
+	return uhs_ctx->status.initialized;
+}
+
+#endif /* ZEPHYR_INCLUDE_USBH_HOST_H */