O2_SD_PARA_SET_REG1
pci_read_config_word(chip->pdev, O2_SD_PARA_SET_REG1, &scratch16);
pci_write_config_word(chip->pdev, O2_SD_PARA_SET_REG1, scratch16);
pci_read_config_word(chip->pdev, O2_SD_PARA_SET_REG1, &scratch16);
pci_write_config_word(chip->pdev, O2_SD_PARA_SET_REG1, scratch16);