NFC: basic NCI protocol implementation

The NFC Controller Interface (NCI) is a standard
communication protocol between an NFC Controller (NFCC)
and a Device Host (DH), defined by the NFC Forum.

Signed-off-by: Ilan Elias <ilane@ti.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

Author: Ilan Elias

include/net/nfc/nci.h

@@ -0,0 +1,313 @@
+/*
+ *  The NFC Controller Interface is the communication protocol between an
+ *  NFC Controller (NFCC) and a Device Host (DH).
+ *
+ *  Copyright (C) 2011 Texas Instruments, Inc.
+ *
+ *  Written by Ilan Elias <ilane@ti.com>
+ *
+ *  Acknowledgements:
+ *  This file is based on hci.h, which was written
+ *  by Maxim Krasnyansky.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms 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, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#ifndef __NCI_H
+#define __NCI_H
+
+/* NCI constants */
+#define NCI_MAX_NUM_MAPPING_CONFIGS				10
+#define NCI_MAX_NUM_RF_CONFIGS					10
+#define NCI_MAX_NUM_CONN					10
+
+/* NCI Status Codes */
+#define	NCI_STATUS_OK						0x00
+#define	NCI_STATUS_REJECTED					0x01
+#define	NCI_STATUS_MESSAGE_CORRUPTED				0x02
+#define	NCI_STATUS_BUFFER_FULL					0x03
+#define	NCI_STATUS_FAILED					0x04
+#define	NCI_STATUS_NOT_INITIALIZED				0x05
+#define	NCI_STATUS_SYNTAX_ERROR					0x06
+#define	NCI_STATUS_SEMANTIC_ERROR				0x07
+#define	NCI_STATUS_UNKNOWN_GID					0x08
+#define	NCI_STATUS_UNKNOWN_OID					0x09
+#define	NCI_STATUS_INVALID_PARAM				0x0a
+#define	NCI_STATUS_MESSAGE_SIZE_EXCEEDED			0x0b
+/* Discovery Specific Status Codes */
+#define	NCI_STATUS_DISCOVERY_ALREADY_STARTED			0xa0
+#define	NCI_STATUS_DISCOVERY_TARGET_ACTIVATION_FAILED		0xa1
+/* RF Interface Specific Status Codes */
+#define	NCI_STATUS_RF_TRANSMISSION_ERROR			0xb0
+#define	NCI_STATUS_RF_PROTOCOL_ERROR				0xb1
+#define	NCI_STATUS_RF_TIMEOUT_ERROR				0xb2
+#define	NCI_STATUS_RF_LINK_LOSS_ERROR				0xb3
+/* NFCEE Interface Specific Status Codes */
+#define	NCI_STATUS_MAX_ACTIVE_NFCEE_INTERFACES_REACHED		0xc0
+#define	NCI_STATUS_NFCEE_INTERFACE_ACTIVATION_FAILED		0xc1
+#define	NCI_STATUS_NFCEE_TRANSMISSION_ERROR			0xc2
+#define	NCI_STATUS_NFCEE_PROTOCOL_ERROR				0xc3
+#define NCI_STATUS_NFCEE_TIMEOUT_ERROR				0xc4
+
+/* NCI RF Technology and Mode */
+#define NCI_NFC_A_PASSIVE_POLL_MODE				0x00
+#define NCI_NFC_B_PASSIVE_POLL_MODE				0x01
+#define NCI_NFC_F_PASSIVE_POLL_MODE				0x02
+#define NCI_NFC_A_ACTIVE_POLL_MODE				0x03
+#define NCI_NFC_F_ACTIVE_POLL_MODE				0x05
+#define NCI_NFC_A_PASSIVE_LISTEN_MODE				0x80
+#define NCI_NFC_B_PASSIVE_LISTEN_MODE				0x81
+#define NCI_NFC_F_PASSIVE_LISTEN_MODE				0x82
+#define NCI_NFC_A_ACTIVE_LISTEN_MODE				0x83
+#define NCI_NFC_F_ACTIVE_LISTEN_MODE				0x85
+
+/* NCI RF Protocols */
+#define NCI_RF_PROTOCOL_UNKNOWN					0x00
+#define NCI_RF_PROTOCOL_T1T					0x01
+#define NCI_RF_PROTOCOL_T2T					0x02
+#define NCI_RF_PROTOCOL_T3T					0x03
+#define NCI_RF_PROTOCOL_ISO_DEP					0x04
+#define NCI_RF_PROTOCOL_NFC_DEP					0x05
+
+/* NCI RF Interfaces */
+#define NCI_RF_INTERFACE_RFU					0x00
+#define	NCI_RF_INTERFACE_FRAME					0x01
+#define	NCI_RF_INTERFACE_ISO_DEP				0x02
+#define	NCI_RF_INTERFACE_NFC_DEP				0x03
+
+/* NCI RF_DISCOVER_MAP_CMD modes */
+#define NCI_DISC_MAP_MODE_POLL					0x01
+#define NCI_DISC_MAP_MODE_LISTEN				0x02
+#define NCI_DISC_MAP_MODE_BOTH					0x03
+
+/* NCI Discovery Types */
+#define NCI_DISCOVERY_TYPE_POLL_A_PASSIVE			0x00
+#define	NCI_DISCOVERY_TYPE_POLL_B_PASSIVE			0x01
+#define	NCI_DISCOVERY_TYPE_POLL_F_PASSIVE			0x02
+#define	NCI_DISCOVERY_TYPE_POLL_A_ACTIVE			0x03
+#define	NCI_DISCOVERY_TYPE_POLL_F_ACTIVE			0x05
+#define	NCI_DISCOVERY_TYPE_WAKEUP_A_PASSIVE			0x06
+#define	NCI_DISCOVERY_TYPE_WAKEUP_B_PASSIVE			0x07
+#define	NCI_DISCOVERY_TYPE_WAKEUP_A_ACTIVE			0x09
+#define	NCI_DISCOVERY_TYPE_LISTEN_A_PASSIVE			0x80
+#define	NCI_DISCOVERY_TYPE_LISTEN_B_PASSIVE			0x81
+#define	NCI_DISCOVERY_TYPE_LISTEN_F_PASSIVE			0x82
+#define	NCI_DISCOVERY_TYPE_LISTEN_A_ACTIVE			0x83
+#define	NCI_DISCOVERY_TYPE_LISTEN_F_ACTIVE			0x85
+
+/* NCI Deactivation Type */
+#define	NCI_DEACTIVATE_TYPE_IDLE_MODE				0x00
+#define	NCI_DEACTIVATE_TYPE_SLEEP_MODE				0x01
+#define	NCI_DEACTIVATE_TYPE_SLEEP_AF_MODE			0x02
+#define	NCI_DEACTIVATE_TYPE_RF_LINK_LOSS			0x03
+#define	NCI_DEACTIVATE_TYPE_DISCOVERY_ERROR			0x04
+
+/* Message Type (MT) */
+#define NCI_MT_DATA_PKT						0x00
+#define NCI_MT_CMD_PKT						0x01
+#define NCI_MT_RSP_PKT						0x02
+#define NCI_MT_NTF_PKT						0x03
+
+#define nci_mt(hdr)			(((hdr)[0]>>5)&0x07)
+#define nci_mt_set(hdr, mt)		((hdr)[0] |= (__u8)(((mt)&0x07)<<5))
+
+/* Packet Boundary Flag (PBF) */
+#define NCI_PBF_LAST						0x00
+#define NCI_PBF_CONT						0x01
+
+#define nci_pbf(hdr)			(__u8)(((hdr)[0]>>4)&0x01)
+#define nci_pbf_set(hdr, pbf)		((hdr)[0] |= (__u8)(((pbf)&0x01)<<4))
+
+/* Control Opcode manipulation */
+#define nci_opcode_pack(gid, oid)	(__u16)((((__u16)((gid)&0x0f))<<8)|\
+					((__u16)((oid)&0x3f)))
+#define nci_opcode(hdr)			nci_opcode_pack(hdr[0], hdr[1])
+#define nci_opcode_gid(op)		(__u8)(((op)&0x0f00)>>8)
+#define nci_opcode_oid(op)		(__u8)((op)&0x003f)
+
+/* Payload Length */
+#define nci_plen(hdr)			(__u8)((hdr)[2])
+
+/* Connection ID */
+#define nci_conn_id(hdr)		(__u8)(((hdr)[0])&0x0f)
+
+/* GID values */
+#define	NCI_GID_CORE						0x0
+#define	NCI_GID_RF_MGMT						0x1
+#define	NCI_GID_NFCEE_MGMT					0x2
+#define	NCI_GID_PROPRIETARY					0xf
+
+/* ---- NCI Packet structures ---- */
+#define NCI_CTRL_HDR_SIZE					3
+#define NCI_DATA_HDR_SIZE					3
+
+struct nci_ctrl_hdr {
+	__u8	gid;		/* MT & PBF & GID */
+	__u8	oid;
+	__u8	plen;
+} __packed;
+
+struct nci_data_hdr {
+	__u8	conn_id;	/* MT & PBF & ConnID */
+	__u8	rfu;
+	__u8	plen;
+} __packed;
+
+/* ------------------------ */
+/* -----  NCI Commands ---- */
+/* ------------------------ */
+#define NCI_OP_CORE_RESET_CMD		nci_opcode_pack(NCI_GID_CORE, 0x00)
+
+#define NCI_OP_CORE_INIT_CMD		nci_opcode_pack(NCI_GID_CORE, 0x01)
+
+#define NCI_OP_CORE_SET_CONFIG_CMD	nci_opcode_pack(NCI_GID_CORE, 0x02)
+
+#define NCI_OP_CORE_CONN_CREATE_CMD	nci_opcode_pack(NCI_GID_CORE, 0x04)
+struct nci_core_conn_create_cmd {
+	__u8	target_handle;
+	__u8	num_target_specific_params;
+} __packed;
+
+#define NCI_OP_CORE_CONN_CLOSE_CMD	nci_opcode_pack(NCI_GID_CORE, 0x06)
+
+#define NCI_OP_RF_DISCOVER_MAP_CMD	nci_opcode_pack(NCI_GID_RF_MGMT, 0x00)
+struct disc_map_config {
+	__u8	rf_protocol;
+	__u8	mode;
+	__u8	rf_interface_type;
+} __packed;
+
+struct nci_rf_disc_map_cmd {
+	__u8				num_mapping_configs;
+	struct disc_map_config		mapping_configs
+					[NCI_MAX_NUM_MAPPING_CONFIGS];
+} __packed;
+
+#define NCI_OP_RF_DISCOVER_CMD		nci_opcode_pack(NCI_GID_RF_MGMT, 0x03)
+struct disc_config {
+	__u8	type;
+	__u8	frequency;
+} __packed;
+
+struct nci_rf_disc_cmd {
+	__u8				num_disc_configs;
+	struct disc_config		disc_configs[NCI_MAX_NUM_RF_CONFIGS];
+} __packed;
+
+#define NCI_OP_RF_DEACTIVATE_CMD	nci_opcode_pack(NCI_GID_RF_MGMT, 0x06)
+struct nci_rf_deactivate_cmd {
+	__u8	type;
+} __packed;
+
+/* ----------------------- */
+/* ---- NCI Responses ---- */
+/* ----------------------- */
+#define NCI_OP_CORE_RESET_RSP		nci_opcode_pack(NCI_GID_CORE, 0x00)
+struct nci_core_reset_rsp {
+	__u8	status;
+	__u8	nci_ver;
+} __packed;
+
+#define NCI_OP_CORE_INIT_RSP		nci_opcode_pack(NCI_GID_CORE, 0x01)
+struct nci_core_init_rsp_1 {
+	__u8	status;
+	__le32	nfcc_features;
+	__u8	num_supported_rf_interfaces;
+	__u8	supported_rf_interfaces[0];	/* variable size array */
+	/* continuted in nci_core_init_rsp_2 */
+} __packed;
+
+struct nci_core_init_rsp_2 {
+	__u8	max_logical_connections;
+	__le16	max_routing_table_size;
+	__u8	max_control_packet_payload_length;
+	__le16	rf_sending_buffer_size;
+	__le16	rf_receiving_buffer_size;
+	__le16	manufacturer_id;
+} __packed;
+
+#define NCI_OP_CORE_SET_CONFIG_RSP	nci_opcode_pack(NCI_GID_CORE, 0x02)
+
+#define NCI_OP_CORE_CONN_CREATE_RSP	nci_opcode_pack(NCI_GID_CORE, 0x04)
+struct nci_core_conn_create_rsp {
+	__u8	status;
+	__u8	max_pkt_payload_size;
+	__u8	initial_num_credits;
+	__u8	conn_id;
+} __packed;
+
+#define NCI_OP_CORE_CONN_CLOSE_RSP	nci_opcode_pack(NCI_GID_CORE, 0x06)
+
+#define NCI_OP_RF_DISCOVER_MAP_RSP	nci_opcode_pack(NCI_GID_RF_MGMT, 0x00)
+
+#define NCI_OP_RF_DISCOVER_RSP		nci_opcode_pack(NCI_GID_RF_MGMT, 0x03)
+
+#define NCI_OP_RF_DEACTIVATE_RSP	nci_opcode_pack(NCI_GID_RF_MGMT, 0x06)
+
+/* --------------------------- */
+/* ---- NCI Notifications ---- */
+/* --------------------------- */
+#define NCI_OP_CORE_CONN_CREDITS_NTF	nci_opcode_pack(NCI_GID_CORE, 0x07)
+struct conn_credit_entry {
+	__u8	conn_id;
+	__u8	credits;
+} __packed;
+
+struct nci_core_conn_credit_ntf {
+	__u8				num_entries;
+	struct conn_credit_entry	conn_entries[NCI_MAX_NUM_CONN];
+} __packed;
+
+#define NCI_OP_RF_FIELD_INFO_NTF	nci_opcode_pack(NCI_GID_CORE, 0x08)
+struct nci_rf_field_info_ntf {
+	__u8	rf_field_status;
+} __packed;
+
+#define NCI_OP_RF_ACTIVATE_NTF		nci_opcode_pack(NCI_GID_RF_MGMT, 0x05)
+struct rf_tech_specific_params_nfca_poll {
+	__u16	sens_res;
+	__u8	nfcid1_len;	/* 0, 4, 7, or 10 Bytes */
+	__u8	nfcid1[10];
+	__u8	sel_res_len;	/* 0 or 1 Bytes */
+	__u8	sel_res;
+} __packed;
+
+struct activation_params_nfca_poll_iso_dep {
+	__u8	rats_res_len;
+	__u8	rats_res[20];
+};
+
+struct nci_rf_activate_ntf {
+	__u8	target_handle;
+	__u8	rf_protocol;
+	__u8	rf_tech_and_mode;
+	__u8	rf_tech_specific_params_len;
+
+	union {
+		struct rf_tech_specific_params_nfca_poll nfca_poll;
+	} rf_tech_specific_params;
+
+	__u8	rf_interface_type;
+	__u8	activation_params_len;
+
+	union {
+		struct activation_params_nfca_poll_iso_dep nfca_poll_iso_dep;
+	} activation_params;
+
+} __packed;
+
+#define NCI_OP_RF_DEACTIVATE_NTF	nci_opcode_pack(NCI_GID_RF_MGMT, 0x06)
+
+#endif /* __NCI_H */