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authorIlan Elias <ilane@ti.com>2011-09-18 04:19:35 -0400
committerJohn W. Linville <linville@tuxdriver.com>2011-09-20 14:43:49 -0400
commit6a2968aaf50c7a22fced77a5e24aa636281efca8 (patch)
treec3c9691da86f90d1eb13ee75e36189faad553496 /include/net/nfc
parent55eb94f9e923cba376cdf48ea5ab28d81116bead (diff)
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>
Diffstat (limited to 'include/net/nfc')
-rw-r--r--include/net/nfc/nci.h313
-rw-r--r--include/net/nfc/nci_core.h183
2 files changed, 496 insertions, 0 deletions
diff --git a/include/net/nfc/nci.h b/include/net/nfc/nci.h
new file mode 100644
index 000000000000..39b85bc0804f
--- /dev/null
+++ b/include/net/nfc/nci.h
@@ -0,0 +1,313 @@
1/*
2 * The NFC Controller Interface is the communication protocol between an
3 * NFC Controller (NFCC) and a Device Host (DH).
4 *
5 * Copyright (C) 2011 Texas Instruments, Inc.
6 *
7 * Written by Ilan Elias <ilane@ti.com>
8 *
9 * Acknowledgements:
10 * This file is based on hci.h, which was written
11 * by Maxim Krasnyansky.
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2
15 * as published by the Free Software Foundation
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 *
26 */
27
28#ifndef __NCI_H
29#define __NCI_H
30
31/* NCI constants */
32#define NCI_MAX_NUM_MAPPING_CONFIGS 10
33#define NCI_MAX_NUM_RF_CONFIGS 10
34#define NCI_MAX_NUM_CONN 10
35
36/* NCI Status Codes */
37#define NCI_STATUS_OK 0x00
38#define NCI_STATUS_REJECTED 0x01
39#define NCI_STATUS_MESSAGE_CORRUPTED 0x02
40#define NCI_STATUS_BUFFER_FULL 0x03
41#define NCI_STATUS_FAILED 0x04
42#define NCI_STATUS_NOT_INITIALIZED 0x05
43#define NCI_STATUS_SYNTAX_ERROR 0x06
44#define NCI_STATUS_SEMANTIC_ERROR 0x07
45#define NCI_STATUS_UNKNOWN_GID 0x08
46#define NCI_STATUS_UNKNOWN_OID 0x09
47#define NCI_STATUS_INVALID_PARAM 0x0a
48#define NCI_STATUS_MESSAGE_SIZE_EXCEEDED 0x0b
49/* Discovery Specific Status Codes */
50#define NCI_STATUS_DISCOVERY_ALREADY_STARTED 0xa0
51#define NCI_STATUS_DISCOVERY_TARGET_ACTIVATION_FAILED 0xa1
52/* RF Interface Specific Status Codes */
53#define NCI_STATUS_RF_TRANSMISSION_ERROR 0xb0
54#define NCI_STATUS_RF_PROTOCOL_ERROR 0xb1
55#define NCI_STATUS_RF_TIMEOUT_ERROR 0xb2
56#define NCI_STATUS_RF_LINK_LOSS_ERROR 0xb3
57/* NFCEE Interface Specific Status Codes */
58#define NCI_STATUS_MAX_ACTIVE_NFCEE_INTERFACES_REACHED 0xc0
59#define NCI_STATUS_NFCEE_INTERFACE_ACTIVATION_FAILED 0xc1
60#define NCI_STATUS_NFCEE_TRANSMISSION_ERROR 0xc2
61#define NCI_STATUS_NFCEE_PROTOCOL_ERROR 0xc3
62#define NCI_STATUS_NFCEE_TIMEOUT_ERROR 0xc4
63
64/* NCI RF Technology and Mode */
65#define NCI_NFC_A_PASSIVE_POLL_MODE 0x00
66#define NCI_NFC_B_PASSIVE_POLL_MODE 0x01
67#define NCI_NFC_F_PASSIVE_POLL_MODE 0x02
68#define NCI_NFC_A_ACTIVE_POLL_MODE 0x03
69#define NCI_NFC_F_ACTIVE_POLL_MODE 0x05
70#define NCI_NFC_A_PASSIVE_LISTEN_MODE 0x80
71#define NCI_NFC_B_PASSIVE_LISTEN_MODE 0x81
72#define NCI_NFC_F_PASSIVE_LISTEN_MODE 0x82
73#define NCI_NFC_A_ACTIVE_LISTEN_MODE 0x83
74#define NCI_NFC_F_ACTIVE_LISTEN_MODE 0x85
75
76/* NCI RF Protocols */
77#define NCI_RF_PROTOCOL_UNKNOWN 0x00
78#define NCI_RF_PROTOCOL_T1T 0x01
79#define NCI_RF_PROTOCOL_T2T 0x02
80#define NCI_RF_PROTOCOL_T3T 0x03
81#define NCI_RF_PROTOCOL_ISO_DEP 0x04
82#define NCI_RF_PROTOCOL_NFC_DEP 0x05
83
84/* NCI RF Interfaces */
85#define NCI_RF_INTERFACE_RFU 0x00
86#define NCI_RF_INTERFACE_FRAME 0x01
87#define NCI_RF_INTERFACE_ISO_DEP 0x02
88#define NCI_RF_INTERFACE_NFC_DEP 0x03
89
90/* NCI RF_DISCOVER_MAP_CMD modes */
91#define NCI_DISC_MAP_MODE_POLL 0x01
92#define NCI_DISC_MAP_MODE_LISTEN 0x02
93#define NCI_DISC_MAP_MODE_BOTH 0x03
94
95/* NCI Discovery Types */
96#define NCI_DISCOVERY_TYPE_POLL_A_PASSIVE 0x00
97#define NCI_DISCOVERY_TYPE_POLL_B_PASSIVE 0x01
98#define NCI_DISCOVERY_TYPE_POLL_F_PASSIVE 0x02
99#define NCI_DISCOVERY_TYPE_POLL_A_ACTIVE 0x03
100#define NCI_DISCOVERY_TYPE_POLL_F_ACTIVE 0x05
101#define NCI_DISCOVERY_TYPE_WAKEUP_A_PASSIVE 0x06
102#define NCI_DISCOVERY_TYPE_WAKEUP_B_PASSIVE 0x07
103#define NCI_DISCOVERY_TYPE_WAKEUP_A_ACTIVE 0x09
104#define NCI_DISCOVERY_TYPE_LISTEN_A_PASSIVE 0x80
105#define NCI_DISCOVERY_TYPE_LISTEN_B_PASSIVE 0x81
106#define NCI_DISCOVERY_TYPE_LISTEN_F_PASSIVE 0x82
107#define NCI_DISCOVERY_TYPE_LISTEN_A_ACTIVE 0x83
108#define NCI_DISCOVERY_TYPE_LISTEN_F_ACTIVE 0x85
109
110/* NCI Deactivation Type */
111#define NCI_DEACTIVATE_TYPE_IDLE_MODE 0x00
112#define NCI_DEACTIVATE_TYPE_SLEEP_MODE 0x01
113#define NCI_DEACTIVATE_TYPE_SLEEP_AF_MODE 0x02
114#define NCI_DEACTIVATE_TYPE_RF_LINK_LOSS 0x03
115#define NCI_DEACTIVATE_TYPE_DISCOVERY_ERROR 0x04
116
117/* Message Type (MT) */
118#define NCI_MT_DATA_PKT 0x00
119#define NCI_MT_CMD_PKT 0x01
120#define NCI_MT_RSP_PKT 0x02
121#define NCI_MT_NTF_PKT 0x03
122
123#define nci_mt(hdr) (((hdr)[0]>>5)&0x07)
124#define nci_mt_set(hdr, mt) ((hdr)[0] |= (__u8)(((mt)&0x07)<<5))
125
126/* Packet Boundary Flag (PBF) */
127#define NCI_PBF_LAST 0x00
128#define NCI_PBF_CONT 0x01
129
130#define nci_pbf(hdr) (__u8)(((hdr)[0]>>4)&0x01)
131#define nci_pbf_set(hdr, pbf) ((hdr)[0] |= (__u8)(((pbf)&0x01)<<4))
132
133/* Control Opcode manipulation */
134#define nci_opcode_pack(gid, oid) (__u16)((((__u16)((gid)&0x0f))<<8)|\
135 ((__u16)((oid)&0x3f)))
136#define nci_opcode(hdr) nci_opcode_pack(hdr[0], hdr[1])
137#define nci_opcode_gid(op) (__u8)(((op)&0x0f00)>>8)
138#define nci_opcode_oid(op) (__u8)((op)&0x003f)
139
140/* Payload Length */
141#define nci_plen(hdr) (__u8)((hdr)[2])
142
143/* Connection ID */
144#define nci_conn_id(hdr) (__u8)(((hdr)[0])&0x0f)
145
146/* GID values */
147#define NCI_GID_CORE 0x0
148#define NCI_GID_RF_MGMT 0x1
149#define NCI_GID_NFCEE_MGMT 0x2
150#define NCI_GID_PROPRIETARY 0xf
151
152/* ---- NCI Packet structures ---- */
153#define NCI_CTRL_HDR_SIZE 3
154#define NCI_DATA_HDR_SIZE 3
155
156struct nci_ctrl_hdr {
157 __u8 gid; /* MT & PBF & GID */
158 __u8 oid;
159 __u8 plen;
160} __packed;
161
162struct nci_data_hdr {
163 __u8 conn_id; /* MT & PBF & ConnID */
164 __u8 rfu;
165 __u8 plen;
166} __packed;
167
168/* ------------------------ */
169/* ----- NCI Commands ---- */
170/* ------------------------ */
171#define NCI_OP_CORE_RESET_CMD nci_opcode_pack(NCI_GID_CORE, 0x00)
172
173#define NCI_OP_CORE_INIT_CMD nci_opcode_pack(NCI_GID_CORE, 0x01)
174
175#define NCI_OP_CORE_SET_CONFIG_CMD nci_opcode_pack(NCI_GID_CORE, 0x02)
176
177#define NCI_OP_CORE_CONN_CREATE_CMD nci_opcode_pack(NCI_GID_CORE, 0x04)
178struct nci_core_conn_create_cmd {
179 __u8 target_handle;
180 __u8 num_target_specific_params;
181} __packed;
182
183#define NCI_OP_CORE_CONN_CLOSE_CMD nci_opcode_pack(NCI_GID_CORE, 0x06)
184
185#define NCI_OP_RF_DISCOVER_MAP_CMD nci_opcode_pack(NCI_GID_RF_MGMT, 0x00)
186struct disc_map_config {
187 __u8 rf_protocol;
188 __u8 mode;
189 __u8 rf_interface_type;
190} __packed;
191
192struct nci_rf_disc_map_cmd {
193 __u8 num_mapping_configs;
194 struct disc_map_config mapping_configs
195 [NCI_MAX_NUM_MAPPING_CONFIGS];
196} __packed;
197
198#define NCI_OP_RF_DISCOVER_CMD nci_opcode_pack(NCI_GID_RF_MGMT, 0x03)
199struct disc_config {
200 __u8 type;
201 __u8 frequency;
202} __packed;
203
204struct nci_rf_disc_cmd {
205 __u8 num_disc_configs;
206 struct disc_config disc_configs[NCI_MAX_NUM_RF_CONFIGS];
207} __packed;
208
209#define NCI_OP_RF_DEACTIVATE_CMD nci_opcode_pack(NCI_GID_RF_MGMT, 0x06)
210struct nci_rf_deactivate_cmd {
211 __u8 type;
212} __packed;
213
214/* ----------------------- */
215/* ---- NCI Responses ---- */
216/* ----------------------- */
217#define NCI_OP_CORE_RESET_RSP nci_opcode_pack(NCI_GID_CORE, 0x00)
218struct nci_core_reset_rsp {
219 __u8 status;
220 __u8 nci_ver;
221} __packed;
222
223#define NCI_OP_CORE_INIT_RSP nci_opcode_pack(NCI_GID_CORE, 0x01)
224struct nci_core_init_rsp_1 {
225 __u8 status;
226 __le32 nfcc_features;
227 __u8 num_supported_rf_interfaces;
228 __u8 supported_rf_interfaces[0]; /* variable size array */
229 /* continuted in nci_core_init_rsp_2 */
230} __packed;
231
232struct nci_core_init_rsp_2 {
233 __u8 max_logical_connections;
234 __le16 max_routing_table_size;
235 __u8 max_control_packet_payload_length;
236 __le16 rf_sending_buffer_size;
237 __le16 rf_receiving_buffer_size;
238 __le16 manufacturer_id;
239} __packed;
240
241#define NCI_OP_CORE_SET_CONFIG_RSP nci_opcode_pack(NCI_GID_CORE, 0x02)
242
243#define NCI_OP_CORE_CONN_CREATE_RSP nci_opcode_pack(NCI_GID_CORE, 0x04)
244struct nci_core_conn_create_rsp {
245 __u8 status;
246 __u8 max_pkt_payload_size;
247 __u8 initial_num_credits;
248 __u8 conn_id;
249} __packed;
250
251#define NCI_OP_CORE_CONN_CLOSE_RSP nci_opcode_pack(NCI_GID_CORE, 0x06)
252
253#define NCI_OP_RF_DISCOVER_MAP_RSP nci_opcode_pack(NCI_GID_RF_MGMT, 0x00)
254
255#define NCI_OP_RF_DISCOVER_RSP nci_opcode_pack(NCI_GID_RF_MGMT, 0x03)
256
257#define NCI_OP_RF_DEACTIVATE_RSP nci_opcode_pack(NCI_GID_RF_MGMT, 0x06)
258
259/* --------------------------- */
260/* ---- NCI Notifications ---- */
261/* --------------------------- */
262#define NCI_OP_CORE_CONN_CREDITS_NTF nci_opcode_pack(NCI_GID_CORE, 0x07)
263struct conn_credit_entry {
264 __u8 conn_id;
265 __u8 credits;
266} __packed;
267
268struct nci_core_conn_credit_ntf {
269 __u8 num_entries;
270 struct conn_credit_entry conn_entries[NCI_MAX_NUM_CONN];
271} __packed;
272
273#define NCI_OP_RF_FIELD_INFO_NTF nci_opcode_pack(NCI_GID_CORE, 0x08)
274struct nci_rf_field_info_ntf {
275 __u8 rf_field_status;
276} __packed;
277
278#define NCI_OP_RF_ACTIVATE_NTF nci_opcode_pack(NCI_GID_RF_MGMT, 0x05)
279struct rf_tech_specific_params_nfca_poll {
280 __u16 sens_res;
281 __u8 nfcid1_len; /* 0, 4, 7, or 10 Bytes */
282 __u8 nfcid1[10];
283 __u8 sel_res_len; /* 0 or 1 Bytes */
284 __u8 sel_res;
285} __packed;
286
287struct activation_params_nfca_poll_iso_dep {
288 __u8 rats_res_len;
289 __u8 rats_res[20];
290};
291
292struct nci_rf_activate_ntf {
293 __u8 target_handle;
294 __u8 rf_protocol;
295 __u8 rf_tech_and_mode;
296 __u8 rf_tech_specific_params_len;
297
298 union {
299 struct rf_tech_specific_params_nfca_poll nfca_poll;
300 } rf_tech_specific_params;
301
302 __u8 rf_interface_type;
303 __u8 activation_params_len;
304
305 union {
306 struct activation_params_nfca_poll_iso_dep nfca_poll_iso_dep;
307 } activation_params;
308
309} __packed;
310
311#define NCI_OP_RF_DEACTIVATE_NTF nci_opcode_pack(NCI_GID_RF_MGMT, 0x06)
312
313#endif /* __NCI_H */
diff --git a/include/net/nfc/nci_core.h b/include/net/nfc/nci_core.h
new file mode 100644
index 000000000000..2563f3a95e67
--- /dev/null
+++ b/include/net/nfc/nci_core.h
@@ -0,0 +1,183 @@
1/*
2 * The NFC Controller Interface is the communication protocol between an
3 * NFC Controller (NFCC) and a Device Host (DH).
4 *
5 * Copyright (C) 2011 Texas Instruments, Inc.
6 *
7 * Written by Ilan Elias <ilane@ti.com>
8 *
9 * Acknowledgements:
10 * This file is based on hci_core.h, which was written
11 * by Maxim Krasnyansky.
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2
15 * as published by the Free Software Foundation
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 *
26 */
27
28#ifndef __NCI_CORE_H
29#define __NCI_CORE_H
30
31#include <linux/interrupt.h>
32#include <linux/skbuff.h>
33
34#include <net/nfc/nfc.h>
35#include <net/nfc/nci.h>
36
37/* NCI device state */
38enum {
39 NCI_INIT,
40 NCI_UP,
41 NCI_DISCOVERY,
42 NCI_POLL_ACTIVE,
43};
44
45/* NCI timeouts */
46#define NCI_RESET_TIMEOUT 5000
47#define NCI_INIT_TIMEOUT 5000
48#define NCI_RF_DISC_TIMEOUT 5000
49#define NCI_RF_DEACTIVATE_TIMEOUT 5000
50#define NCI_CMD_TIMEOUT 5000
51
52struct nci_dev;
53
54struct nci_ops {
55 int (*open)(struct nci_dev *ndev);
56 int (*close)(struct nci_dev *ndev);
57 int (*send)(struct sk_buff *skb);
58};
59
60#define NCI_MAX_SUPPORTED_RF_INTERFACES 4
61
62/* NCI Core structures */
63struct nci_dev {
64 struct nfc_dev *nfc_dev;
65 struct nci_ops *ops;
66
67 int tx_headroom;
68 int tx_tailroom;
69
70 unsigned long flags;
71
72 atomic_t cmd_cnt;
73 atomic_t credits_cnt;
74
75 struct timer_list cmd_timer;
76
77 struct workqueue_struct *cmd_wq;
78 struct work_struct cmd_work;
79
80 struct workqueue_struct *rx_wq;
81 struct work_struct rx_work;
82
83 struct workqueue_struct *tx_wq;
84 struct work_struct tx_work;
85
86 struct sk_buff_head cmd_q;
87 struct sk_buff_head rx_q;
88 struct sk_buff_head tx_q;
89
90 struct mutex req_lock;
91 struct completion req_completion;
92 __u32 req_status;
93 __u32 req_result;
94
95 void *driver_data;
96
97 __u32 poll_prots;
98 __u32 target_available_prots;
99 __u32 target_active_prot;
100
101 /* received during NCI_OP_CORE_RESET_RSP */
102 __u8 nci_ver;
103
104 /* received during NCI_OP_CORE_INIT_RSP */
105 __u32 nfcc_features;
106 __u8 num_supported_rf_interfaces;
107 __u8 supported_rf_interfaces
108 [NCI_MAX_SUPPORTED_RF_INTERFACES];
109 __u8 max_logical_connections;
110 __u16 max_routing_table_size;
111 __u8 max_control_packet_payload_length;
112 __u16 rf_sending_buffer_size;
113 __u16 rf_receiving_buffer_size;
114 __u16 manufacturer_id;
115
116 /* received during NCI_OP_CORE_CONN_CREATE_RSP for static conn 0 */
117 __u8 max_pkt_payload_size;
118 __u8 initial_num_credits;
119 __u8 conn_id;
120
121 /* stored during nci_data_exchange */
122 data_exchange_cb_t data_exchange_cb;
123 void *data_exchange_cb_context;
124 struct sk_buff *rx_data_reassembly;
125};
126
127/* ----- NCI Devices ----- */
128struct nci_dev *nci_allocate_device(struct nci_ops *ops,
129 __u32 supported_protocols,
130 int tx_headroom,
131 int tx_tailroom);
132void nci_free_device(struct nci_dev *ndev);
133int nci_register_device(struct nci_dev *ndev);
134void nci_unregister_device(struct nci_dev *ndev);
135int nci_recv_frame(struct sk_buff *skb);
136
137static inline struct sk_buff *nci_skb_alloc(struct nci_dev *ndev,
138 unsigned int len,
139 gfp_t how)
140{
141 struct sk_buff *skb;
142
143 skb = alloc_skb(len + ndev->tx_headroom + ndev->tx_tailroom, how);
144 if (skb)
145 skb_reserve(skb, ndev->tx_headroom);
146
147 return skb;
148}
149
150static inline void nci_set_parent_dev(struct nci_dev *ndev, struct device *dev)
151{
152 nfc_set_parent_dev(ndev->nfc_dev, dev);
153}
154
155static inline void nci_set_drvdata(struct nci_dev *ndev, void *data)
156{
157 ndev->driver_data = data;
158}
159
160static inline void *nci_get_drvdata(struct nci_dev *ndev)
161{
162 return ndev->driver_data;
163}
164
165void nci_rsp_packet(struct nci_dev *ndev, struct sk_buff *skb);
166void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb);
167void nci_rx_data_packet(struct nci_dev *ndev, struct sk_buff *skb);
168int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, void *payload);
169int nci_send_data(struct nci_dev *ndev, __u8 conn_id, struct sk_buff *skb);
170void nci_data_exchange_complete(struct nci_dev *ndev, struct sk_buff *skb,
171 int err);
172
173/* ----- NCI requests ----- */
174#define NCI_REQ_DONE 0
175#define NCI_REQ_PEND 1
176#define NCI_REQ_CANCELED 2
177
178void nci_req_complete(struct nci_dev *ndev, int result);
179
180/* ----- NCI status code ----- */
181int nci_to_errno(__u8 code);
182
183#endif /* __NCI_CORE_H */
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