[usb] first stab at a usb device stack
diff --git a/include/dev/usb.h b/include/dev/usb.h
index 556a4ed..a35a819 100644
--- a/include/dev/usb.h
+++ b/include/dev/usb.h
@@ -23,9 +23,39 @@
#ifndef __DEV_USB_H
#define __DEV_USB_H
-/* device side usb stack api */
+#include <sys/types.h>
+#include <compiler.h>
+
+/* top level initialization for usb client, abstracts away the interfaces */
+typedef struct {
+ void *desc;
+ size_t len;
+} usb_descriptor __ALIGNED(2);
+
+/* complete usb config struct, passed in to usb_setup() */
+typedef struct {
+ struct usb_descriptor_speed {
+ usb_descriptor device;
+ usb_descriptor device_qual;
+ usb_descriptor config;
+ } lowspeed, highspeed;
+ usb_descriptor device_string;
+ usb_descriptor mfg_string;
+ usb_descriptor serial_string;
+ usb_descriptor langid;
+} usb_config;
void usb_init(void);
+/* external code needs to set up the usb stack via the following calls */
+void usb_setup(usb_config *config);
+
+/* apped new interface descriptors to the existing config if desired */
+int usb_append_interface_highspeed(const uint8_t *int_descr, size_t len);
+int usb_append_interface_lowspeed(const uint8_t *int_descr, size_t len);
+
+void usb_start(void);
+void usb_stop(void);
+
#endif