RXCHK_BRCM_TAG_CID_MASK
reg &= RXCHK_BRCM_TAG_CID_MASK;
if (nfc->fs.location > RXCHK_BRCM_TAG_CID_MASK)
reg &= ~(RXCHK_BRCM_TAG_CID_MASK << RXCHK_BRCM_TAG_CID_SHIFT);