PCIR_DSXG_LEGACY
pci_write_config_word(chip->pci, PCIR_DSXG_LEGACY, legacy_ctrl | YMFPCI_LEGACY_JPEN);
pci_read_config_word(pci, PCIR_DSXG_LEGACY, &old_legacy_ctrl);
pci_write_config_word(pci, PCIR_DSXG_LEGACY, legacy_ctrl);
pci_write_config_word(pci, PCIR_DSXG_LEGACY, legacy_ctrl);
pci_write_config_word(pci, PCIR_DSXG_LEGACY, legacy_ctrl);
PCIR_DSXG_LEGACY,
pci_write_config_word(chip->pci, PCIR_DSXG_LEGACY, chip->old_legacy_ctrl);