NFC: st21nfca: Adding P2P support to st21nfca in Initiator & Target mode

Support for Initiator and Target mode with ISO18092 commands support:
- ATR_REQ/ATR_RES
- PSL_REQ/PSL_RES
- DEP_REQ/DEP_RES

Work based on net/nfc/digital_dep.c.
st21nfca is using:
- Gate reader F for P2P in initiator mode.
- Gate card F for P2P in target mode.

Felica tag and p2p are differentiated with NFCID2.
When starting with 01FE it is acting in p2p mode.

On complete_target_discovered on ST21NFCA_RF_READER_F_GATE
supported_protocols is set to NFC_PROTO_NFC_DEP_MASK
for P2P.

Tested against: Nexus S, Galaxy S2, Galaxy S3, Galaxy S3 Mini,
Nexus 4 & Nexus 5.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 43 insertions, 0 deletions

diff --git a/drivers/nfc/st21nfca/st21nfca_dep.h b/drivers/nfc/st21nfca/st21nfca_dep.h
new file mode 100644
index 000000000000..ca213dee9c6e
--- /dev/null
+++ b/drivers/nfc/st21nfca/st21nfca_dep.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2014  STMicroelectronics SAS. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __ST21NFCA_DEP_H
+#define __ST21NFCA_DEP_H
+
+#include <linux/skbuff.h>
+#include <linux/workqueue.h>
+
+struct st21nfca_dep_info {
+	struct sk_buff *tx_pending;
+	struct work_struct tx_work;
+	u8 curr_nfc_dep_pni;
+	u32 idx;
+	u8 to;
+	u8 did;
+	u8 bsi;
+	u8 bri;
+	u8 lri;
+} __packed;
+
+int st21nfca_tm_event_send_data(struct nfc_hci_dev *hdev, struct sk_buff *skb,
+				u8 gate);
+int st21nfca_tm_send_dep_res(struct nfc_hci_dev *hdev, struct sk_buff *skb);
+
+int st21nfca_im_send_atr_req(struct nfc_hci_dev *hdev, u8 *gb, size_t gb_len);
+int st21nfca_im_send_dep_req(struct nfc_hci_dev *hdev, struct sk_buff *skb);
+void st21nfca_dep_init(struct nfc_hci_dev *hdev);
+void st21nfca_dep_deinit(struct nfc_hci_dev *hdev);
+#endif /* __ST21NFCA_DEP_H */