Added USB (specifically CDC-ACM) support

cpu/at91sam7s/usb/usb-api.h

@@ -0,0 +1,60 @@
+#ifndef __USB_API_H__SYN81IFYBN__
+#define __USB_API_H__SYN81IFYBN__
+
+#include <sys/process.h>
+
+void
+usb_setup(void);
+
+void
+usb_set_user_process(struct process *p);
+
+void
+usb_setup_bulk_endpoint(unsigned char addr,
+			unsigned char *buffer, unsigned int buf_size);
+void
+usb_setup_interrupt_endpoint(unsigned char addr,
+			     unsigned char *buffer, unsigned int buf_size);
+
+/* Get a pointer to a buffer dat of length lenp.
+   To which USB data can be written. */
+void
+usb_send_buffer_get(unsigned char ep_addr, unsigned int offset,
+		    unsigned char **dat, unsigned int *lenp);
+
+/* Notify the USB subsystem that data has been written to the buffer returned
+   by usb_send_buffer_get. */
+void
+usb_send_buffer_commit(unsigned char ep_addr, unsigned int len);
+
+unsigned int
+usb_send_data(unsigned char ep_addr,
+	      const unsigned char *dat, unsigned int len);
+
+unsigned int
+usb_recv_data(unsigned char ep_addr, unsigned char *dat, unsigned int len);
+
+void
+usb_disable_endpoint(unsigned char addr);
+
+/* Asynchronous */
+#define USB_USER_MSG_TYPE_CONFIG 0x01 
+#define USB_USER_MSG_TYPE_SUSPEND 0x02 
+#define USB_USER_MSG_TYPE_RESUME 0x03
+
+/* Synchronous, the supplied data is only valid during the event */
+#define USB_USER_MSG_TYPE_EP_OUT(ep_addr) ((((ep_addr) & 0x7f)<<4) | 0x01)
+#define USB_USER_MSG_TYPE_EP_IN(ep_addr) ((((ep_addr) & 0x7f)<<4) | 0x02)
+
+struct usb_user_msg {
+  unsigned int type;
+  union {
+    /* For EPx_OUT */
+    unsigned short length;
+    /* For CONFIG */
+    unsigned char config;
+  } data;
+};
+
+
+#endif /* __USB_API_H__SYN81IFYBN__ */