NFC_V1_V2_BUF_ADDR
writew(host->active_cs << 4, NFC_V1_V2_BUF_ADDR);
writew((host->active_cs << 4) | i, NFC_V1_V2_BUF_ADDR);
writew(host->active_cs << 4, NFC_V1_V2_BUF_ADDR);
writew(host->active_cs << 4, NFC_V1_V2_BUF_ADDR);
writew((host->active_cs << 4) | i, NFC_V1_V2_BUF_ADDR);
writew(host->active_cs << 4, NFC_V1_V2_BUF_ADDR);