DATA_IN
#define INPUT (DATA_IN << 8)
if (command[0] == DATA_IN) {
case DATA_IN: /* Data in phase */
case DATA_IN: /* Data in phase */
case DATA_IN: /* Data in phase */
if (host->phase != DATA_IN) {
udc->ep0state = DATA_IN;
if (udc->ep0state == DATA_IN)