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Linux 3.19-rc6
[cris-mirror.git] / net / nfc / nci / ntf.c
blob22e453cb787d4d62e3246919f32ae5db14557ef3
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) 2014 Marvell International Ltd.
6 * Copyright (C) 2011 Texas Instruments, Inc.
7 *
8 * Written by Ilan Elias <ilane@ti.com>
9 *
10 * Acknowledgements:
11 * This file is based on hci_event.c, which was written
12 * by Maxim Krasnyansky.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2
16 * as published by the Free Software Foundation
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, see <http://www.gnu.org/licenses/>.
25 *
26 */
27
28 #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
29
30 #include <linux/types.h>
31 #include <linux/interrupt.h>
32 #include <linux/bitops.h>
33 #include <linux/skbuff.h>
34
35 #include "../nfc.h"
36 #include <net/nfc/nci.h>
37 #include <net/nfc/nci_core.h>
38 #include <linux/nfc.h>
39
40 /* Handle NCI Notification packets */
41
42 static void nci_core_conn_credits_ntf_packet(struct nci_dev *ndev,
43 struct sk_buff *skb)
44 {
45 struct nci_core_conn_credit_ntf *ntf = (void *) skb->data;
46 int i;
47
48 pr_debug("num_entries %d\n", ntf->num_entries);
49
50 if (ntf->num_entries > NCI_MAX_NUM_CONN)
51 ntf->num_entries = NCI_MAX_NUM_CONN;
52
53 /* update the credits */
54 for (i = 0; i < ntf->num_entries; i++) {
55 ntf->conn_entries[i].conn_id =
56 nci_conn_id(&ntf->conn_entries[i].conn_id);
57
58 pr_debug("entry[%d]: conn_id %d, credits %d\n",
59 i, ntf->conn_entries[i].conn_id,
60 ntf->conn_entries[i].credits);
61
62 if (ntf->conn_entries[i].conn_id == NCI_STATIC_RF_CONN_ID) {
63 /* found static rf connection */
64 atomic_add(ntf->conn_entries[i].credits,
65 &ndev->credits_cnt);
66 }
67 }
68
69 /* trigger the next tx */
70 if (!skb_queue_empty(&ndev->tx_q))
71 queue_work(ndev->tx_wq, &ndev->tx_work);
72 }
73
74 static void nci_core_generic_error_ntf_packet(struct nci_dev *ndev,
75 struct sk_buff *skb)
76 {
77 __u8 status = skb->data[0];
78
79 pr_debug("status 0x%x\n", status);
80
81 if (atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) {
82 /* Activation failed, so complete the request
83 (the state remains the same) */
84 nci_req_complete(ndev, status);
85 }
86 }
87
88 static void nci_core_conn_intf_error_ntf_packet(struct nci_dev *ndev,
89 struct sk_buff *skb)
90 {
91 struct nci_core_intf_error_ntf *ntf = (void *) skb->data;
92
93 ntf->conn_id = nci_conn_id(&ntf->conn_id);
94
95 pr_debug("status 0x%x, conn_id %d\n", ntf->status, ntf->conn_id);
96
97 /* complete the data exchange transaction, if exists */
98 if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags))
99 nci_data_exchange_complete(ndev, NULL, -EIO);
100 }
101
102 static __u8 *nci_extract_rf_params_nfca_passive_poll(struct nci_dev *ndev,
103 struct rf_tech_specific_params_nfca_poll *nfca_poll,
104 __u8 *data)
105 {
106 nfca_poll->sens_res = __le16_to_cpu(*((__le16 *)data));
107 data += 2;
108
109 nfca_poll->nfcid1_len = min_t(__u8, *data++, NFC_NFCID1_MAXSIZE);
110
111 pr_debug("sens_res 0x%x, nfcid1_len %d\n",
112 nfca_poll->sens_res, nfca_poll->nfcid1_len);
113
114 memcpy(nfca_poll->nfcid1, data, nfca_poll->nfcid1_len);
115 data += nfca_poll->nfcid1_len;
116
117 nfca_poll->sel_res_len = *data++;
118
119 if (nfca_poll->sel_res_len != 0)
120 nfca_poll->sel_res = *data++;
121
122 pr_debug("sel_res_len %d, sel_res 0x%x\n",
123 nfca_poll->sel_res_len,
124 nfca_poll->sel_res);
125
126 return data;
127 }
128
129 static __u8 *nci_extract_rf_params_nfcb_passive_poll(struct nci_dev *ndev,
130 struct rf_tech_specific_params_nfcb_poll *nfcb_poll,
131 __u8 *data)
132 {
133 nfcb_poll->sensb_res_len = min_t(__u8, *data++, NFC_SENSB_RES_MAXSIZE);
134
135 pr_debug("sensb_res_len %d\n", nfcb_poll->sensb_res_len);
136
137 memcpy(nfcb_poll->sensb_res, data, nfcb_poll->sensb_res_len);
138 data += nfcb_poll->sensb_res_len;
139
140 return data;
141 }
142
143 static __u8 *nci_extract_rf_params_nfcf_passive_poll(struct nci_dev *ndev,
144 struct rf_tech_specific_params_nfcf_poll *nfcf_poll,
145 __u8 *data)
146 {
147 nfcf_poll->bit_rate = *data++;
148 nfcf_poll->sensf_res_len = min_t(__u8, *data++, NFC_SENSF_RES_MAXSIZE);
149
150 pr_debug("bit_rate %d, sensf_res_len %d\n",
151 nfcf_poll->bit_rate, nfcf_poll->sensf_res_len);
152
153 memcpy(nfcf_poll->sensf_res, data, nfcf_poll->sensf_res_len);
154 data += nfcf_poll->sensf_res_len;
155
156 return data;
157 }
158
159 static __u8 *nci_extract_rf_params_nfcv_passive_poll(struct nci_dev *ndev,
160 struct rf_tech_specific_params_nfcv_poll *nfcv_poll,
161 __u8 *data)
162 {
163 ++data;
164 nfcv_poll->dsfid = *data++;
165 memcpy(nfcv_poll->uid, data, NFC_ISO15693_UID_MAXSIZE);
166 data += NFC_ISO15693_UID_MAXSIZE;
167 return data;
168 }
169
170 static __u8 *nci_extract_rf_params_nfcf_passive_listen(struct nci_dev *ndev,
171 struct rf_tech_specific_params_nfcf_listen *nfcf_listen,
172 __u8 *data)
173 {
174 nfcf_listen->local_nfcid2_len = min_t(__u8, *data++,
175 NFC_NFCID2_MAXSIZE);
176 memcpy(nfcf_listen->local_nfcid2, data, nfcf_listen->local_nfcid2_len);
177 data += nfcf_listen->local_nfcid2_len;
178
179 return data;
180 }
181
182 static __u32 nci_get_prop_rf_protocol(struct nci_dev *ndev, __u8 rf_protocol)
183 {
184 if (ndev->ops->get_rfprotocol)
185 return ndev->ops->get_rfprotocol(ndev, rf_protocol);
186 return 0;
187 }
188
189 static int nci_add_new_protocol(struct nci_dev *ndev,
190 struct nfc_target *target,
191 __u8 rf_protocol,
192 __u8 rf_tech_and_mode,
193 void *params)
194 {
195 struct rf_tech_specific_params_nfca_poll *nfca_poll;
196 struct rf_tech_specific_params_nfcb_poll *nfcb_poll;
197 struct rf_tech_specific_params_nfcf_poll *nfcf_poll;
198 struct rf_tech_specific_params_nfcv_poll *nfcv_poll;
199 __u32 protocol;
200
201 if (rf_protocol == NCI_RF_PROTOCOL_T1T)
202 protocol = NFC_PROTO_JEWEL_MASK;
203 else if (rf_protocol == NCI_RF_PROTOCOL_T2T)
204 protocol = NFC_PROTO_MIFARE_MASK;
205 else if (rf_protocol == NCI_RF_PROTOCOL_ISO_DEP)
206 if (rf_tech_and_mode == NCI_NFC_A_PASSIVE_POLL_MODE)
207 protocol = NFC_PROTO_ISO14443_MASK;
208 else
209 protocol = NFC_PROTO_ISO14443_B_MASK;
210 else if (rf_protocol == NCI_RF_PROTOCOL_T3T)
211 protocol = NFC_PROTO_FELICA_MASK;
212 else if (rf_protocol == NCI_RF_PROTOCOL_NFC_DEP)
213 protocol = NFC_PROTO_NFC_DEP_MASK;
214 else if (rf_protocol == NCI_RF_PROTOCOL_T5T)
215 protocol = NFC_PROTO_ISO15693_MASK;
216 else
217 protocol = nci_get_prop_rf_protocol(ndev, rf_protocol);
218
219 if (!(protocol & ndev->poll_prots)) {
220 pr_err("the target found does not have the desired protocol\n");
221 return -EPROTO;
222 }
223
224 if (rf_tech_and_mode == NCI_NFC_A_PASSIVE_POLL_MODE) {
225 nfca_poll = (struct rf_tech_specific_params_nfca_poll *)params;
226
227 target->sens_res = nfca_poll->sens_res;
228 target->sel_res = nfca_poll->sel_res;
229 target->nfcid1_len = nfca_poll->nfcid1_len;
230 if (target->nfcid1_len > 0) {
231 memcpy(target->nfcid1, nfca_poll->nfcid1,
232 target->nfcid1_len);
233 }
234 } else if (rf_tech_and_mode == NCI_NFC_B_PASSIVE_POLL_MODE) {
235 nfcb_poll = (struct rf_tech_specific_params_nfcb_poll *)params;
236
237 target->sensb_res_len = nfcb_poll->sensb_res_len;
238 if (target->sensb_res_len > 0) {
239 memcpy(target->sensb_res, nfcb_poll->sensb_res,
240 target->sensb_res_len);
241 }
242 } else if (rf_tech_and_mode == NCI_NFC_F_PASSIVE_POLL_MODE) {
243 nfcf_poll = (struct rf_tech_specific_params_nfcf_poll *)params;
244
245 target->sensf_res_len = nfcf_poll->sensf_res_len;
246 if (target->sensf_res_len > 0) {
247 memcpy(target->sensf_res, nfcf_poll->sensf_res,
248 target->sensf_res_len);
249 }
250 } else if (rf_tech_and_mode == NCI_NFC_V_PASSIVE_POLL_MODE) {
251 nfcv_poll = (struct rf_tech_specific_params_nfcv_poll *)params;
252
253 target->is_iso15693 = 1;
254 target->iso15693_dsfid = nfcv_poll->dsfid;
255 memcpy(target->iso15693_uid, nfcv_poll->uid, NFC_ISO15693_UID_MAXSIZE);
256 } else {
257 pr_err("unsupported rf_tech_and_mode 0x%x\n", rf_tech_and_mode);
258 return -EPROTO;
259 }
260
261 target->supported_protocols |= protocol;
262
263 pr_debug("protocol 0x%x\n", protocol);
264
265 return 0;
266 }
267
268 static void nci_add_new_target(struct nci_dev *ndev,
269 struct nci_rf_discover_ntf *ntf)
270 {
271 struct nfc_target *target;
272 int i, rc;
273
274 for (i = 0; i < ndev->n_targets; i++) {
275 target = &ndev->targets[i];
276 if (target->logical_idx == ntf->rf_discovery_id) {
277 /* This target already exists, add the new protocol */
278 nci_add_new_protocol(ndev, target, ntf->rf_protocol,
279 ntf->rf_tech_and_mode,
280 &ntf->rf_tech_specific_params);
281 return;
282 }
283 }
284
285 /* This is a new target, check if we've enough room */
286 if (ndev->n_targets == NCI_MAX_DISCOVERED_TARGETS) {
287 pr_debug("not enough room, ignoring new target...\n");
288 return;
289 }
290
291 target = &ndev->targets[ndev->n_targets];
292
293 rc = nci_add_new_protocol(ndev, target, ntf->rf_protocol,
294 ntf->rf_tech_and_mode,
295 &ntf->rf_tech_specific_params);
296 if (!rc) {
297 target->logical_idx = ntf->rf_discovery_id;
298 ndev->n_targets++;
299
300 pr_debug("logical idx %d, n_targets %d\n", target->logical_idx,
301 ndev->n_targets);
302 }
303 }
304
305 void nci_clear_target_list(struct nci_dev *ndev)
306 {
307 memset(ndev->targets, 0,
308 (sizeof(struct nfc_target)*NCI_MAX_DISCOVERED_TARGETS));
309
310 ndev->n_targets = 0;
311 }
312
313 static void nci_rf_discover_ntf_packet(struct nci_dev *ndev,
314 struct sk_buff *skb)
315 {
316 struct nci_rf_discover_ntf ntf;
317 __u8 *data = skb->data;
318 bool add_target = true;
319
320 ntf.rf_discovery_id = *data++;
321 ntf.rf_protocol = *data++;
322 ntf.rf_tech_and_mode = *data++;
323 ntf.rf_tech_specific_params_len = *data++;
324
325 pr_debug("rf_discovery_id %d\n", ntf.rf_discovery_id);
326 pr_debug("rf_protocol 0x%x\n", ntf.rf_protocol);
327 pr_debug("rf_tech_and_mode 0x%x\n", ntf.rf_tech_and_mode);
328 pr_debug("rf_tech_specific_params_len %d\n",
329 ntf.rf_tech_specific_params_len);
330
331 if (ntf.rf_tech_specific_params_len > 0) {
332 switch (ntf.rf_tech_and_mode) {
333 case NCI_NFC_A_PASSIVE_POLL_MODE:
334 data = nci_extract_rf_params_nfca_passive_poll(ndev,
335 &(ntf.rf_tech_specific_params.nfca_poll), data);
336 break;
337
338 case NCI_NFC_B_PASSIVE_POLL_MODE:
339 data = nci_extract_rf_params_nfcb_passive_poll(ndev,
340 &(ntf.rf_tech_specific_params.nfcb_poll), data);
341 break;
342
343 case NCI_NFC_F_PASSIVE_POLL_MODE:
344 data = nci_extract_rf_params_nfcf_passive_poll(ndev,
345 &(ntf.rf_tech_specific_params.nfcf_poll), data);
346 break;
347
348 case NCI_NFC_V_PASSIVE_POLL_MODE:
349 data = nci_extract_rf_params_nfcv_passive_poll(ndev,
350 &(ntf.rf_tech_specific_params.nfcv_poll), data);
351 break;
352
353 default:
354 pr_err("unsupported rf_tech_and_mode 0x%x\n",
355 ntf.rf_tech_and_mode);
356 data += ntf.rf_tech_specific_params_len;
357 add_target = false;
358 }
359 }
360
361 ntf.ntf_type = *data++;
362 pr_debug("ntf_type %d\n", ntf.ntf_type);
363
364 if (add_target == true)
365 nci_add_new_target(ndev, &ntf);
366
367 if (ntf.ntf_type == NCI_DISCOVER_NTF_TYPE_MORE) {
368 atomic_set(&ndev->state, NCI_W4_ALL_DISCOVERIES);
369 } else {
370 atomic_set(&ndev->state, NCI_W4_HOST_SELECT);
371 nfc_targets_found(ndev->nfc_dev, ndev->targets,
372 ndev->n_targets);
373 }
374 }
375
376 static int nci_extract_activation_params_iso_dep(struct nci_dev *ndev,
377 struct nci_rf_intf_activated_ntf *ntf, __u8 *data)
378 {
379 struct activation_params_nfca_poll_iso_dep *nfca_poll;
380 struct activation_params_nfcb_poll_iso_dep *nfcb_poll;
381
382 switch (ntf->activation_rf_tech_and_mode) {
383 case NCI_NFC_A_PASSIVE_POLL_MODE:
384 nfca_poll = &ntf->activation_params.nfca_poll_iso_dep;
385 nfca_poll->rats_res_len = min_t(__u8, *data++, 20);
386 pr_debug("rats_res_len %d\n", nfca_poll->rats_res_len);
387 if (nfca_poll->rats_res_len > 0) {
388 memcpy(nfca_poll->rats_res,
389 data, nfca_poll->rats_res_len);
390 }
391 break;
392
393 case NCI_NFC_B_PASSIVE_POLL_MODE:
394 nfcb_poll = &ntf->activation_params.nfcb_poll_iso_dep;
395 nfcb_poll->attrib_res_len = min_t(__u8, *data++, 50);
396 pr_debug("attrib_res_len %d\n", nfcb_poll->attrib_res_len);
397 if (nfcb_poll->attrib_res_len > 0) {
398 memcpy(nfcb_poll->attrib_res,
399 data, nfcb_poll->attrib_res_len);
400 }
401 break;
402
403 default:
404 pr_err("unsupported activation_rf_tech_and_mode 0x%x\n",
405 ntf->activation_rf_tech_and_mode);
406 return NCI_STATUS_RF_PROTOCOL_ERROR;
407 }
408
409 return NCI_STATUS_OK;
410 }
411
412 static int nci_extract_activation_params_nfc_dep(struct nci_dev *ndev,
413 struct nci_rf_intf_activated_ntf *ntf, __u8 *data)
414 {
415 struct activation_params_poll_nfc_dep *poll;
416 struct activation_params_listen_nfc_dep *listen;
417
418 switch (ntf->activation_rf_tech_and_mode) {
419 case NCI_NFC_A_PASSIVE_POLL_MODE:
420 case NCI_NFC_F_PASSIVE_POLL_MODE:
421 poll = &ntf->activation_params.poll_nfc_dep;
422 poll->atr_res_len = min_t(__u8, *data++,
423 NFC_ATR_RES_MAXSIZE - 2);
424 pr_debug("atr_res_len %d\n", poll->atr_res_len);
425 if (poll->atr_res_len > 0)
426 memcpy(poll->atr_res, data, poll->atr_res_len);
427 break;
428
429 case NCI_NFC_A_PASSIVE_LISTEN_MODE:
430 case NCI_NFC_F_PASSIVE_LISTEN_MODE:
431 listen = &ntf->activation_params.listen_nfc_dep;
432 listen->atr_req_len = min_t(__u8, *data++,
433 NFC_ATR_REQ_MAXSIZE - 2);
434 pr_debug("atr_req_len %d\n", listen->atr_req_len);
435 if (listen->atr_req_len > 0)
436 memcpy(listen->atr_req, data, listen->atr_req_len);
437 break;
438
439 default:
440 pr_err("unsupported activation_rf_tech_and_mode 0x%x\n",
441 ntf->activation_rf_tech_and_mode);
442 return NCI_STATUS_RF_PROTOCOL_ERROR;
443 }
444
445 return NCI_STATUS_OK;
446 }
447
448 static void nci_target_auto_activated(struct nci_dev *ndev,
449 struct nci_rf_intf_activated_ntf *ntf)
450 {
451 struct nfc_target *target;
452 int rc;
453
454 target = &ndev->targets[ndev->n_targets];
455
456 rc = nci_add_new_protocol(ndev, target, ntf->rf_protocol,
457 ntf->activation_rf_tech_and_mode,
458 &ntf->rf_tech_specific_params);
459 if (rc)
460 return;
461
462 target->logical_idx = ntf->rf_discovery_id;
463 ndev->n_targets++;
464
465 pr_debug("logical idx %d, n_targets %d\n",
466 target->logical_idx, ndev->n_targets);
467
468 nfc_targets_found(ndev->nfc_dev, ndev->targets, ndev->n_targets);
469 }
470
471 static int nci_store_general_bytes_nfc_dep(struct nci_dev *ndev,
472 struct nci_rf_intf_activated_ntf *ntf)
473 {
474 ndev->remote_gb_len = 0;
475
476 if (ntf->activation_params_len <= 0)
477 return NCI_STATUS_OK;
478
479 switch (ntf->activation_rf_tech_and_mode) {
480 case NCI_NFC_A_PASSIVE_POLL_MODE:
481 case NCI_NFC_F_PASSIVE_POLL_MODE:
482 ndev->remote_gb_len = min_t(__u8,
483 (ntf->activation_params.poll_nfc_dep.atr_res_len
484 - NFC_ATR_RES_GT_OFFSET),
485 NFC_ATR_RES_GB_MAXSIZE);
486 memcpy(ndev->remote_gb,
487 (ntf->activation_params.poll_nfc_dep.atr_res
488 + NFC_ATR_RES_GT_OFFSET),
489 ndev->remote_gb_len);
490 break;
491
492 case NCI_NFC_A_PASSIVE_LISTEN_MODE:
493 case NCI_NFC_F_PASSIVE_LISTEN_MODE:
494 ndev->remote_gb_len = min_t(__u8,
495 (ntf->activation_params.listen_nfc_dep.atr_req_len
496 - NFC_ATR_REQ_GT_OFFSET),
497 NFC_ATR_REQ_GB_MAXSIZE);
498 memcpy(ndev->remote_gb,
499 (ntf->activation_params.listen_nfc_dep.atr_req
500 + NFC_ATR_REQ_GT_OFFSET),
501 ndev->remote_gb_len);
502 break;
503
504 default:
505 pr_err("unsupported activation_rf_tech_and_mode 0x%x\n",
506 ntf->activation_rf_tech_and_mode);
507 return NCI_STATUS_RF_PROTOCOL_ERROR;
508 }
509
510 return NCI_STATUS_OK;
511 }
512
513 static void nci_rf_intf_activated_ntf_packet(struct nci_dev *ndev,
514 struct sk_buff *skb)
515 {
516 struct nci_rf_intf_activated_ntf ntf;
517 __u8 *data = skb->data;
518 int err = NCI_STATUS_OK;
519
520 ntf.rf_discovery_id = *data++;
521 ntf.rf_interface = *data++;
522 ntf.rf_protocol = *data++;
523 ntf.activation_rf_tech_and_mode = *data++;
524 ntf.max_data_pkt_payload_size = *data++;
525 ntf.initial_num_credits = *data++;
526 ntf.rf_tech_specific_params_len = *data++;
527
528 pr_debug("rf_discovery_id %d\n", ntf.rf_discovery_id);
529 pr_debug("rf_interface 0x%x\n", ntf.rf_interface);
530 pr_debug("rf_protocol 0x%x\n", ntf.rf_protocol);
531 pr_debug("activation_rf_tech_and_mode 0x%x\n",
532 ntf.activation_rf_tech_and_mode);
533 pr_debug("max_data_pkt_payload_size 0x%x\n",
534 ntf.max_data_pkt_payload_size);
535 pr_debug("initial_num_credits 0x%x\n",
536 ntf.initial_num_credits);
537 pr_debug("rf_tech_specific_params_len %d\n",
538 ntf.rf_tech_specific_params_len);
539
540 if (ntf.rf_tech_specific_params_len > 0) {
541 switch (ntf.activation_rf_tech_and_mode) {
542 case NCI_NFC_A_PASSIVE_POLL_MODE:
543 data = nci_extract_rf_params_nfca_passive_poll(ndev,
544 &(ntf.rf_tech_specific_params.nfca_poll), data);
545 break;
546
547 case NCI_NFC_B_PASSIVE_POLL_MODE:
548 data = nci_extract_rf_params_nfcb_passive_poll(ndev,
549 &(ntf.rf_tech_specific_params.nfcb_poll), data);
550 break;
551
552 case NCI_NFC_F_PASSIVE_POLL_MODE:
553 data = nci_extract_rf_params_nfcf_passive_poll(ndev,
554 &(ntf.rf_tech_specific_params.nfcf_poll), data);
555 break;
556
557 case NCI_NFC_V_PASSIVE_POLL_MODE:
558 data = nci_extract_rf_params_nfcv_passive_poll(ndev,
559 &(ntf.rf_tech_specific_params.nfcv_poll), data);
560 break;
561
562 case NCI_NFC_A_PASSIVE_LISTEN_MODE:
563 /* no RF technology specific parameters */
564 break;
565
566 case NCI_NFC_F_PASSIVE_LISTEN_MODE:
567 data = nci_extract_rf_params_nfcf_passive_listen(ndev,
568 &(ntf.rf_tech_specific_params.nfcf_listen),
569 data);
570 break;
571
572 default:
573 pr_err("unsupported activation_rf_tech_and_mode 0x%x\n",
574 ntf.activation_rf_tech_and_mode);
575 err = NCI_STATUS_RF_PROTOCOL_ERROR;
576 goto exit;
577 }
578 }
579
580 ntf.data_exch_rf_tech_and_mode = *data++;
581 ntf.data_exch_tx_bit_rate = *data++;
582 ntf.data_exch_rx_bit_rate = *data++;
583 ntf.activation_params_len = *data++;
584
585 pr_debug("data_exch_rf_tech_and_mode 0x%x\n",
586 ntf.data_exch_rf_tech_and_mode);
587 pr_debug("data_exch_tx_bit_rate 0x%x\n", ntf.data_exch_tx_bit_rate);
588 pr_debug("data_exch_rx_bit_rate 0x%x\n", ntf.data_exch_rx_bit_rate);
589 pr_debug("activation_params_len %d\n", ntf.activation_params_len);
590
591 if (ntf.activation_params_len > 0) {
592 switch (ntf.rf_interface) {
593 case NCI_RF_INTERFACE_ISO_DEP:
594 err = nci_extract_activation_params_iso_dep(ndev,
595 &ntf, data);
596 break;
597
598 case NCI_RF_INTERFACE_NFC_DEP:
599 err = nci_extract_activation_params_nfc_dep(ndev,
600 &ntf, data);
601 break;
602
603 case NCI_RF_INTERFACE_FRAME:
604 /* no activation params */
605 break;
606
607 default:
608 pr_err("unsupported rf_interface 0x%x\n",
609 ntf.rf_interface);
610 err = NCI_STATUS_RF_PROTOCOL_ERROR;
611 break;
612 }
613 }
614
615 exit:
616 if (err == NCI_STATUS_OK) {
617 ndev->max_data_pkt_payload_size = ntf.max_data_pkt_payload_size;
618 ndev->initial_num_credits = ntf.initial_num_credits;
619
620 /* set the available credits to initial value */
621 atomic_set(&ndev->credits_cnt, ndev->initial_num_credits);
622
623 /* store general bytes to be reported later in dep_link_up */
624 if (ntf.rf_interface == NCI_RF_INTERFACE_NFC_DEP) {
625 err = nci_store_general_bytes_nfc_dep(ndev, &ntf);
626 if (err != NCI_STATUS_OK)
627 pr_err("unable to store general bytes\n");
628 }
629 }
630
631 if (!(ntf.activation_rf_tech_and_mode & NCI_RF_TECH_MODE_LISTEN_MASK)) {
632 /* Poll mode */
633 if (atomic_read(&ndev->state) == NCI_DISCOVERY) {
634 /* A single target was found and activated
635 * automatically */
636 atomic_set(&ndev->state, NCI_POLL_ACTIVE);
637 if (err == NCI_STATUS_OK)
638 nci_target_auto_activated(ndev, &ntf);
639 } else { /* ndev->state == NCI_W4_HOST_SELECT */
640 /* A selected target was activated, so complete the
641 * request */
642 atomic_set(&ndev->state, NCI_POLL_ACTIVE);
643 nci_req_complete(ndev, err);
644 }
645 } else {
646 /* Listen mode */
647 atomic_set(&ndev->state, NCI_LISTEN_ACTIVE);
648 if (err == NCI_STATUS_OK &&
649 ntf.rf_protocol == NCI_RF_PROTOCOL_NFC_DEP) {
650 err = nfc_tm_activated(ndev->nfc_dev,
651 NFC_PROTO_NFC_DEP_MASK,
652 NFC_COMM_PASSIVE,
653 ndev->remote_gb,
654 ndev->remote_gb_len);
655 if (err != NCI_STATUS_OK)
656 pr_err("error when signaling tm activation\n");
657 }
658 }
659 }
660
661 static void nci_rf_deactivate_ntf_packet(struct nci_dev *ndev,
662 struct sk_buff *skb)
663 {
664 struct nci_rf_deactivate_ntf *ntf = (void *) skb->data;
665
666 pr_debug("entry, type 0x%x, reason 0x%x\n", ntf->type, ntf->reason);
667
668 /* drop tx data queue */
669 skb_queue_purge(&ndev->tx_q);
670
671 /* drop partial rx data packet */
672 if (ndev->rx_data_reassembly) {
673 kfree_skb(ndev->rx_data_reassembly);
674 ndev->rx_data_reassembly = NULL;
675 }
676
677 /* complete the data exchange transaction, if exists */
678 if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags))
679 nci_data_exchange_complete(ndev, NULL, -EIO);
680
681 switch (ntf->type) {
682 case NCI_DEACTIVATE_TYPE_IDLE_MODE:
683 nci_clear_target_list(ndev);
684 atomic_set(&ndev->state, NCI_IDLE);
685 break;
686 case NCI_DEACTIVATE_TYPE_SLEEP_MODE:
687 case NCI_DEACTIVATE_TYPE_SLEEP_AF_MODE:
688 atomic_set(&ndev->state, NCI_W4_HOST_SELECT);
689 break;
690 case NCI_DEACTIVATE_TYPE_DISCOVERY:
691 nci_clear_target_list(ndev);
692 atomic_set(&ndev->state, NCI_DISCOVERY);
693 break;
694 }
695
696 nci_req_complete(ndev, NCI_STATUS_OK);
697 }
698
699 void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb)
700 {
701 __u16 ntf_opcode = nci_opcode(skb->data);
702
703 pr_debug("NCI RX: MT=ntf, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n",
704 nci_pbf(skb->data),
705 nci_opcode_gid(ntf_opcode),
706 nci_opcode_oid(ntf_opcode),
707 nci_plen(skb->data));
708
709 /* strip the nci control header */
710 skb_pull(skb, NCI_CTRL_HDR_SIZE);
711
712 switch (ntf_opcode) {
713 case NCI_OP_CORE_CONN_CREDITS_NTF:
714 nci_core_conn_credits_ntf_packet(ndev, skb);
715 break;
716
717 case NCI_OP_CORE_GENERIC_ERROR_NTF:
718 nci_core_generic_error_ntf_packet(ndev, skb);
719 break;
720
721 case NCI_OP_CORE_INTF_ERROR_NTF:
722 nci_core_conn_intf_error_ntf_packet(ndev, skb);
723 break;
724
725 case NCI_OP_RF_DISCOVER_NTF:
726 nci_rf_discover_ntf_packet(ndev, skb);
727 break;
728
729 case NCI_OP_RF_INTF_ACTIVATED_NTF:
730 nci_rf_intf_activated_ntf_packet(ndev, skb);
731 break;
732
733 case NCI_OP_RF_DEACTIVATE_NTF:
734 nci_rf_deactivate_ntf_packet(ndev, skb);
735 break;
736
737 default:
738 pr_err("unknown ntf opcode 0x%x\n", ntf_opcode);
739 break;
740 }
741
742 kfree_skb(skb);
743 }
CRIS linux kernel tree