diff --git a/sw/device/lib/usbdev.h b/sw/device/lib/usbdev.h
index bb9d59d..afe7794 100644
--- a/sw/device/lib/usbdev.h
+++ b/sw/device/lib/usbdev.h
@@ -36,6 +36,11 @@
 };
 
 /**
+ * Select USB lines P or N
+ */
+typedef enum line_sel { kDpSel = 0, kDnSel = 1 } line_sel_t;
+
+/**
  * Allocate a buffer for the caller to use
  *
  * @param ctx usbdev context pointer
@@ -229,6 +234,21 @@
  */
 void usbdev_init(usbdev_ctx_t *ctx, bool pinflip, bool diff_rx, bool diff_tx);
 
+/**
+ * Force usbdev to output suspend state for testing purposes
+ */
+void usbdev_force_suspend(void);
+
+/**
+ * Force usbdev pull-up to specific value
+ */
+void usbdev_force_dx_pullup(line_sel_t line, bool set);
+
+/**
+ * Enable usb wake
+ */
+void usbdev_wake(bool set);
+
 // Used for tracing what is going on. This may impact timing which is critical
 // when simulating with the USB DPI module.
 //#define ENABLE_TRC