1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23#ifndef __NET_NFC_H
24#define __NET_NFC_H
25
26#include <linux/nfc.h>
27#include <linux/device.h>
28#include <linux/skbuff.h>
29
30#define nfc_info(dev, fmt, ...) dev_info((dev), "NFC: " fmt, ##__VA_ARGS__)
31#define nfc_err(dev, fmt, ...) dev_err((dev), "NFC: " fmt, ##__VA_ARGS__)
32
33struct nfc_phy_ops {
34 int (*write)(void *dev_id, struct sk_buff *skb);
35 int (*enable)(void *dev_id);
36 void (*disable)(void *dev_id);
37};
38
39struct nfc_dev;
40
41
42
43
44
45
46
47
48
49
50
51
52typedef void (*data_exchange_cb_t)(void *context, struct sk_buff *skb,
53 int err);
54
55typedef void (*se_io_cb_t)(void *context, u8 *apdu, size_t apdu_len, int err);
56
57struct nfc_target;
58
59struct nfc_ops {
60 int (*dev_up)(struct nfc_dev *dev);
61 int (*dev_down)(struct nfc_dev *dev);
62 int (*start_poll)(struct nfc_dev *dev,
63 u32 im_protocols, u32 tm_protocols);
64 void (*stop_poll)(struct nfc_dev *dev);
65 int (*dep_link_up)(struct nfc_dev *dev, struct nfc_target *target,
66 u8 comm_mode, u8 *gb, size_t gb_len);
67 int (*dep_link_down)(struct nfc_dev *dev);
68 int (*activate_target)(struct nfc_dev *dev, struct nfc_target *target,
69 u32 protocol);
70 void (*deactivate_target)(struct nfc_dev *dev,
71 struct nfc_target *target, u8 mode);
72 int (*im_transceive)(struct nfc_dev *dev, struct nfc_target *target,
73 struct sk_buff *skb, data_exchange_cb_t cb,
74 void *cb_context);
75 int (*tm_send)(struct nfc_dev *dev, struct sk_buff *skb);
76 int (*check_presence)(struct nfc_dev *dev, struct nfc_target *target);
77 int (*fw_download)(struct nfc_dev *dev, const char *firmware_name);
78
79
80 int (*discover_se)(struct nfc_dev *dev);
81 int (*enable_se)(struct nfc_dev *dev, u32 se_idx);
82 int (*disable_se)(struct nfc_dev *dev, u32 se_idx);
83 int (*se_io) (struct nfc_dev *dev, u32 se_idx,
84 u8 *apdu, size_t apdu_length,
85 se_io_cb_t cb, void *cb_context);
86};
87
88#define NFC_TARGET_IDX_ANY -1
89#define NFC_MAX_GT_LEN 48
90#define NFC_ATR_RES_GT_OFFSET 15
91#define NFC_ATR_REQ_GT_OFFSET 14
92
93
94
95
96
97
98
99
100
101struct nfc_target {
102 u32 idx;
103 u32 supported_protocols;
104 u16 sens_res;
105 u8 sel_res;
106 u8 nfcid1_len;
107 u8 nfcid1[NFC_NFCID1_MAXSIZE];
108 u8 nfcid2_len;
109 u8 nfcid2[NFC_NFCID2_MAXSIZE];
110 u8 sensb_res_len;
111 u8 sensb_res[NFC_SENSB_RES_MAXSIZE];
112 u8 sensf_res_len;
113 u8 sensf_res[NFC_SENSF_RES_MAXSIZE];
114 u8 hci_reader_gate;
115 u8 logical_idx;
116 u8 is_iso15693;
117 u8 iso15693_dsfid;
118 u8 iso15693_uid[NFC_ISO15693_UID_MAXSIZE];
119};
120
121
122
123
124
125
126
127
128
129
130
131struct nfc_se {
132 struct list_head list;
133 u32 idx;
134 u16 type;
135 u16 state;
136};
137
138
139
140
141
142
143
144
145
146
147
148
149
150#define NFC_MIN_AID_LENGTH 5
151#define NFC_MAX_AID_LENGTH 16
152#define NFC_MAX_PARAMS_LENGTH 255
153
154#define NFC_EVT_TRANSACTION_AID_TAG 0x81
155#define NFC_EVT_TRANSACTION_PARAMS_TAG 0x82
156struct nfc_evt_transaction {
157 u32 aid_len;
158 u8 aid[NFC_MAX_AID_LENGTH];
159 u8 params_len;
160 u8 params[0];
161} __packed;
162
163struct nfc_genl_data {
164 u32 poll_req_portid;
165 struct mutex genl_data_mutex;
166};
167
168struct nfc_vendor_cmd {
169 __u32 vendor_id;
170 __u32 subcmd;
171 int (*doit)(struct nfc_dev *dev, void *data, size_t data_len);
172};
173
174struct nfc_dev {
175 int idx;
176 u32 target_next_idx;
177 struct nfc_target *targets;
178 int n_targets;
179 int targets_generation;
180 struct device dev;
181 bool dev_up;
182 bool fw_download_in_progress;
183 u8 rf_mode;
184 bool polling;
185 struct nfc_target *active_target;
186 bool dep_link_up;
187 struct nfc_genl_data genl_data;
188 u32 supported_protocols;
189
190 struct list_head secure_elements;
191
192 int tx_headroom;
193 int tx_tailroom;
194
195 struct timer_list check_pres_timer;
196 struct work_struct check_pres_work;
197
198 bool shutting_down;
199
200 struct rfkill *rfkill;
201
202 struct nfc_vendor_cmd *vendor_cmds;
203 int n_vendor_cmds;
204
205 struct nfc_ops *ops;
206 struct genl_info *cur_cmd_info;
207};
208#define to_nfc_dev(_dev) container_of(_dev, struct nfc_dev, dev)
209
210extern struct class nfc_class;
211
212struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops,
213 u32 supported_protocols,
214 int tx_headroom,
215 int tx_tailroom);
216
217
218
219
220
221
222static inline void nfc_free_device(struct nfc_dev *dev)
223{
224 put_device(&dev->dev);
225}
226
227int nfc_register_device(struct nfc_dev *dev);
228
229void nfc_unregister_device(struct nfc_dev *dev);
230
231
232
233
234
235
236
237static inline void nfc_set_parent_dev(struct nfc_dev *nfc_dev,
238 struct device *dev)
239{
240 nfc_dev->dev.parent = dev;
241}
242
243
244
245
246
247
248
249static inline void nfc_set_drvdata(struct nfc_dev *dev, void *data)
250{
251 dev_set_drvdata(&dev->dev, data);
252}
253
254
255
256
257
258
259static inline void *nfc_get_drvdata(struct nfc_dev *dev)
260{
261 return dev_get_drvdata(&dev->dev);
262}
263
264
265
266
267
268
269static inline const char *nfc_device_name(struct nfc_dev *dev)
270{
271 return dev_name(&dev->dev);
272}
273
274struct sk_buff *nfc_alloc_send_skb(struct nfc_dev *dev, struct sock *sk,
275 unsigned int flags, unsigned int size,
276 unsigned int *err);
277struct sk_buff *nfc_alloc_recv_skb(unsigned int size, gfp_t gfp);
278
279int nfc_set_remote_general_bytes(struct nfc_dev *dev,
280 u8 *gt, u8 gt_len);
281u8 *nfc_get_local_general_bytes(struct nfc_dev *dev, size_t *gb_len);
282
283int nfc_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
284 u32 result);
285
286int nfc_targets_found(struct nfc_dev *dev,
287 struct nfc_target *targets, int ntargets);
288int nfc_target_lost(struct nfc_dev *dev, u32 target_idx);
289
290int nfc_dep_link_is_up(struct nfc_dev *dev, u32 target_idx,
291 u8 comm_mode, u8 rf_mode);
292
293int nfc_tm_activated(struct nfc_dev *dev, u32 protocol, u8 comm_mode,
294 u8 *gb, size_t gb_len);
295int nfc_tm_deactivated(struct nfc_dev *dev);
296int nfc_tm_data_received(struct nfc_dev *dev, struct sk_buff *skb);
297
298void nfc_driver_failure(struct nfc_dev *dev, int err);
299
300int nfc_se_transaction(struct nfc_dev *dev, u8 se_idx,
301 struct nfc_evt_transaction *evt_transaction);
302int nfc_se_connectivity(struct nfc_dev *dev, u8 se_idx);
303int nfc_add_se(struct nfc_dev *dev, u32 se_idx, u16 type);
304int nfc_remove_se(struct nfc_dev *dev, u32 se_idx);
305struct nfc_se *nfc_find_se(struct nfc_dev *dev, u32 se_idx);
306
307void nfc_send_to_raw_sock(struct nfc_dev *dev, struct sk_buff *skb,
308 u8 payload_type, u8 direction);
309
310static inline int nfc_set_vendor_cmds(struct nfc_dev *dev,
311 struct nfc_vendor_cmd *cmds,
312 int n_cmds)
313{
314 if (dev->vendor_cmds || dev->n_vendor_cmds)
315 return -EINVAL;
316
317 dev->vendor_cmds = cmds;
318 dev->n_vendor_cmds = n_cmds;
319
320 return 0;
321}
322
323struct sk_buff *__nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev *dev,
324 enum nfc_attrs attr,
325 u32 oui, u32 subcmd,
326 int approxlen);
327int nfc_vendor_cmd_reply(struct sk_buff *skb);
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353static inline struct sk_buff *
354nfc_vendor_cmd_alloc_reply_skb(struct nfc_dev *dev,
355 u32 oui, u32 subcmd, int approxlen)
356{
357 return __nfc_alloc_vendor_cmd_reply_skb(dev,
358 NFC_ATTR_VENDOR_DATA,
359 oui,
360 subcmd, approxlen);
361}
362
363#endif
364