XDEV_FS
#define DEV_FULLSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_FS)
#define SLOT_SPEED_FS (XDEV_FS << 10)
ret = xhci_port_bw_show(xhci, DEV_PORT_SPEED(XDEV_FS), s);
#define DEV_FULLSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_FS)
#define SLOT_SPEED_FS (XDEV_FS << 10)
if (((portsc & PORT_PLS_MASK) == XDEV_U3) || ((portsc & DEV_SPEED_MASK) == XDEV_FS))