IGC_CTRL_TFCE
ctrl &= (~(IGC_CTRL_TFCE | IGC_CTRL_RFCE));
ctrl &= (~IGC_CTRL_TFCE);
ctrl |= IGC_CTRL_TFCE;
ctrl |= (IGC_CTRL_TFCE | IGC_CTRL_RFCE);
(ctrl & IGC_CTRL_TFCE) &&
(ctrl & IGC_CTRL_TFCE) ? "TX" : "None");