TYPE_BULK
case TYPE_BULK:
dbc->ring_in = xhci_dbc_ring_alloc(dev, TYPE_BULK, flags);
dbc->ring_out = xhci_dbc_ring_alloc(dev, TYPE_BULK, flags);
case TYPE_BULK:
csr1 |= TX_TYPE(TYPE_BULK);
csr1 |= RX_TYPE(TYPE_BULK);
[USB_ENDPOINT_XFER_BULK] = TYPE_BULK,