SL11_E0PID
sl11write(sc, SL11_E0PID, (pid << 4) + endpoint);
{{SL11_E0ADDR, SL11_E0LEN, SL11_E0PID, SL11_E0DEV },
slhci_write(sc, SL11_E0PID, SL11_PID_SOF);
#define SL11_E1PID (SL11_E1BASE + SL11_E0PID)