-void usbhs_pkt_update(struct usbhs_pkt *pkt,
- struct usbhs_pipe *pipe,
- void *buf, int len);
+extern struct usbhs_pkt_handle usbhs_fifo_push_handler;
+extern struct usbhs_pkt_handle usbhs_fifo_pop_handler;
+extern struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler;
+
+void usbhs_pkt_init(struct usbhs_pkt *pkt);
+void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
+ struct usbhs_pkt_handle *handler,
+ void *buf, int len, int zero);
+void usbhs_pkt_pop(struct usbhs_pkt *pkt);
+struct usbhs_pkt *usbhs_pkt_get(struct usbhs_pipe *pipe);
+
+#define usbhs_pkt_start(p) ((p)->handler->prepare(p))
+#define usbhs_pkt_run(p) ((p)->handler->try_run(p))