AHCI_PHYCS2R
ahci_mask_set(ctlr->r_mem, AHCI_PHYCS2R, ~PHYCS2R_UF1_MASK,
ahci_set(ctlr->r_mem, AHCI_PHYCS2R, PHYCS2R_CALIBRATE);
val = ATA_INL(ctlr->r_mem, AHCI_PHYCS2R);