+static int wait_spinup(volatile u8 *port_mmio)
+{
+ ulong start;
+ u32 tf_data;
+
+ start = get_timer(0);
+ do {
+ tf_data = readl(port_mmio + PORT_TFDATA);
+ if (!(tf_data & ATA_BUSY))
+ return 0;
+ } while (get_timer(start) < WAIT_MS_SPINUP);
+
+ return -ETIMEDOUT;
+}