ahci_set
ahci_set(ctlr->r_mem, AHCI_PHYCS1R, PHYCS1R_HIGHZ);
ahci_set(ctlr->r_mem, AHCI_PHYCS1R, PHYCS1R_BIT15 | PHYCS1R_BIT28);
ahci_set(ctlr->r_mem, AHCI_PHYCS0R, PHYCS0R_POWER_ENABLE);
ahci_set(ctlr->r_mem, AHCI_PHYCS2R, PHYCS2R_CALIBRATE);