From 9c59844005c22700b36dcdbafeea7956b7f4b174 Mon Sep 17 00:00:00 2001 From: Arron Wang Date: Mon, 22 Apr 2013 17:21:04 +0800 Subject: [PATCH] NFC: pn544: Identify Type F NFC-DEP through NFCID2 NFCID2 is defined as the first 2 manufacturer ID (IDm) bytes. NFC DEP (NFC peer to peer) devices Type-F NFCID2 must start with 0x01fe according to the NFC Digital Specification. By checking those first 2 bytes we send the right command either to the reader gate when NFCID2 != 0x1fe (The NFC tag case) or to the NFCIP1 gate when seeing an NFC DEP device (The NFC peer to peer case). Without this fix, Felica (Type F) tags are not properly detected with this driver. Signed-off-by: Arron Wang Signed-off-by: Samuel Ortiz --- drivers/nfc/pn544/pn544.c | 25 +++++++++++++++---------- 1 file changed, 15 insertions(+), 10 deletions(-) diff --git a/drivers/nfc/pn544/pn544.c b/drivers/nfc/pn544/pn544.c index 9c5f16e7baef..0963de2f6ab0 100644 --- a/drivers/nfc/pn544/pn544.c +++ b/drivers/nfc/pn544/pn544.c @@ -551,20 +551,25 @@ static int pn544_hci_complete_target_discovered(struct nfc_hci_dev *hdev, return -EPROTO; } - r = nfc_hci_send_cmd(hdev, PN544_RF_READER_F_GATE, - PN544_RF_READER_CMD_ACTIVATE_NEXT, - uid_skb->data, uid_skb->len, NULL); - kfree_skb(uid_skb); - - r = nfc_hci_send_cmd(hdev, + /* Type F NFC-DEP IDm has prefix 0x01FE */ + if ((uid_skb->data[0] == 0x01) && (uid_skb->data[1] == 0xfe)) { + kfree_skb(uid_skb); + r = nfc_hci_send_cmd(hdev, PN544_RF_READER_NFCIP1_INITIATOR_GATE, PN544_HCI_CMD_CONTINUE_ACTIVATION, NULL, 0, NULL); - if (r < 0) - return r; + if (r < 0) + return r; - target->hci_reader_gate = PN544_RF_READER_NFCIP1_INITIATOR_GATE; - target->supported_protocols = NFC_PROTO_NFC_DEP_MASK; + target->supported_protocols = NFC_PROTO_NFC_DEP_MASK; + target->hci_reader_gate = + PN544_RF_READER_NFCIP1_INITIATOR_GATE; + } else { + r = nfc_hci_send_cmd(hdev, PN544_RF_READER_F_GATE, + PN544_RF_READER_CMD_ACTIVATE_NEXT, + uid_skb->data, uid_skb->len, NULL); + kfree_skb(uid_skb); + } } else if (target->supported_protocols & NFC_PROTO_ISO14443_MASK) { /* * TODO: maybe other ISO 14443 require some kind of continue -- 2.11.0