REG_DCKB_I_0
val = (u8)rtw_read32_mask(rtwdev, REG_DCKB_I_0, 0xf0000000);
rtw_write32_set(rtwdev, REG_DCKB_I_0, BIT(19));
rtw_write32_mask(rtwdev, REG_DCKB_I_0, 0xf0000000, val);