PORT_FBS_EN
writel(fbs | PORT_FBS_EN, port_mmio + PORT_FBS);
if (fbs & PORT_FBS_EN) {
writel(fbs | PORT_FBS_EN, port_mmio + PORT_FBS);
if (fbs & PORT_FBS_EN) {
if ((fbs & PORT_FBS_EN) == 0) {
writel(fbs & ~PORT_FBS_EN, port_mmio + PORT_FBS);
if (fbs & PORT_FBS_EN)