nfc_read
nfc_write(mtd, reg, nfc_read(mtd, reg) | bits);
nfc_write(mtd, reg, nfc_read(mtd, reg) & ~bits);
if ((nfc_read(mtd, NFC_CONFIG2) & NFC_INT) == 0) {
(nfc_read(mtd, NFC_CONFIG2) & NFC_INT), NFC_TIMEOUT);
while (nfc_read(mtd, NFC_CONFIG1) & NFC_RESET) {