PHYRWCTL
rtsx_pci_write_register(pcr, PHYRWCTL, 0xFF, 0x81);
err = rtsx_pci_read_register(pcr, PHYRWCTL, &tmp);
rtsx_pci_write_register(pcr, PHYRWCTL, 0xFF, 0x80);
err = rtsx_pci_read_register(pcr, PHYRWCTL, &tmp);