REG_FC_ENABLE
(void) t1_tpi_read(mac->adapter, MACREG(mac, REG_FC_ENABLE), &val);
(void) t1_tpi_write(mac->adapter, MACREG(mac, REG_FC_ENABLE), val);
(void) t1_tpi_read(mac->adapter, MACREG(mac, REG_FC_ENABLE), &val);