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Merge remote-tracking branch 'ipvs-next/master'
[deliverable/linux.git] / net / nfc / nci / ntf.c
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 struct nci_conn_info *conn_info;
47 int i;
48
49 pr_debug("num_entries %d\n", ntf->num_entries);
50
51 if (ntf->num_entries > NCI_MAX_NUM_CONN)
52 ntf->num_entries = NCI_MAX_NUM_CONN;
53
54 /* update the credits */
55 for (i = 0; i < ntf->num_entries; i++) {
56 ntf->conn_entries[i].conn_id =
57 nci_conn_id(&ntf->conn_entries[i].conn_id);
58
59 pr_debug("entry[%d]: conn_id %d, credits %d\n",
60 i, ntf->conn_entries[i].conn_id,
61 ntf->conn_entries[i].credits);
62
63 conn_info = nci_get_conn_info_by_conn_id(ndev,
64 ntf->conn_entries[i].conn_id);
65 if (!conn_info)
66 return;
67
68 atomic_add(ntf->conn_entries[i].credits,
69 &conn_info->credits_cnt);
70 }
71
72 /* trigger the next tx */
73 if (!skb_queue_empty(&ndev->tx_q))
74 queue_work(ndev->tx_wq, &ndev->tx_work);
75 }
76
77 static void nci_core_generic_error_ntf_packet(struct nci_dev *ndev,
78 struct sk_buff *skb)
79 {
80 __u8 status = skb->data[0];
81
82 pr_debug("status 0x%x\n", status);
83
84 if (atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) {
85 /* Activation failed, so complete the request
86 (the state remains the same) */
87 nci_req_complete(ndev, status);
88 }
89 }
90
91 static void nci_core_conn_intf_error_ntf_packet(struct nci_dev *ndev,
92 struct sk_buff *skb)
93 {
94 struct nci_core_intf_error_ntf *ntf = (void *) skb->data;
95
96 ntf->conn_id = nci_conn_id(&ntf->conn_id);
97
98 pr_debug("status 0x%x, conn_id %d\n", ntf->status, ntf->conn_id);
99
100 /* complete the data exchange transaction, if exists */
101 if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags))
102 nci_data_exchange_complete(ndev, NULL, ntf->conn_id, -EIO);
103 }
104
105 static __u8 *nci_extract_rf_params_nfca_passive_poll(struct nci_dev *ndev,
106 struct rf_tech_specific_params_nfca_poll *nfca_poll,
107 __u8 *data)
108 {
109 nfca_poll->sens_res = __le16_to_cpu(*((__le16 *)data));
110 data += 2;
111
112 nfca_poll->nfcid1_len = min_t(__u8, *data++, NFC_NFCID1_MAXSIZE);
113
114 pr_debug("sens_res 0x%x, nfcid1_len %d\n",
115 nfca_poll->sens_res, nfca_poll->nfcid1_len);
116
117 memcpy(nfca_poll->nfcid1, data, nfca_poll->nfcid1_len);
118 data += nfca_poll->nfcid1_len;
119
120 nfca_poll->sel_res_len = *data++;
121
122 if (nfca_poll->sel_res_len != 0)
123 nfca_poll->sel_res = *data++;
124
125 pr_debug("sel_res_len %d, sel_res 0x%x\n",
126 nfca_poll->sel_res_len,
127 nfca_poll->sel_res);
128
129 return data;
130 }
131
132 static __u8 *nci_extract_rf_params_nfcb_passive_poll(struct nci_dev *ndev,
133 struct rf_tech_specific_params_nfcb_poll *nfcb_poll,
134 __u8 *data)
135 {
136 nfcb_poll->sensb_res_len = min_t(__u8, *data++, NFC_SENSB_RES_MAXSIZE);
137
138 pr_debug("sensb_res_len %d\n", nfcb_poll->sensb_res_len);
139
140 memcpy(nfcb_poll->sensb_res, data, nfcb_poll->sensb_res_len);
141 data += nfcb_poll->sensb_res_len;
142
143 return data;
144 }
145
146 static __u8 *nci_extract_rf_params_nfcf_passive_poll(struct nci_dev *ndev,
147 struct rf_tech_specific_params_nfcf_poll *nfcf_poll,
148 __u8 *data)
149 {
150 nfcf_poll->bit_rate = *data++;
151 nfcf_poll->sensf_res_len = min_t(__u8, *data++, NFC_SENSF_RES_MAXSIZE);
152
153 pr_debug("bit_rate %d, sensf_res_len %d\n",
154 nfcf_poll->bit_rate, nfcf_poll->sensf_res_len);
155
156 memcpy(nfcf_poll->sensf_res, data, nfcf_poll->sensf_res_len);
157 data += nfcf_poll->sensf_res_len;
158
159 return data;
160 }
161
162 static __u8 *nci_extract_rf_params_nfcv_passive_poll(struct nci_dev *ndev,
163 struct rf_tech_specific_params_nfcv_poll *nfcv_poll,
164 __u8 *data)
165 {
166 ++data;
167 nfcv_poll->dsfid = *data++;
168 memcpy(nfcv_poll->uid, data, NFC_ISO15693_UID_MAXSIZE);
169 data += NFC_ISO15693_UID_MAXSIZE;
170 return data;
171 }
172
173 static __u8 *nci_extract_rf_params_nfcf_passive_listen(struct nci_dev *ndev,
174 struct rf_tech_specific_params_nfcf_listen *nfcf_listen,
175 __u8 *data)
176 {
177 nfcf_listen->local_nfcid2_len = min_t(__u8, *data++,
178 NFC_NFCID2_MAXSIZE);
179 memcpy(nfcf_listen->local_nfcid2, data, nfcf_listen->local_nfcid2_len);
180 data += nfcf_listen->local_nfcid2_len;
181
182 return data;
183 }
184
185 static __u32 nci_get_prop_rf_protocol(struct nci_dev *ndev, __u8 rf_protocol)
186 {
187 if (ndev->ops->get_rfprotocol)
188 return ndev->ops->get_rfprotocol(ndev, rf_protocol);
189 return 0;
190 }
191
192 static int nci_add_new_protocol(struct nci_dev *ndev,
193 struct nfc_target *target,
194 __u8 rf_protocol,
195 __u8 rf_tech_and_mode,
196 void *params)
197 {
198 struct rf_tech_specific_params_nfca_poll *nfca_poll;
199 struct rf_tech_specific_params_nfcb_poll *nfcb_poll;
200 struct rf_tech_specific_params_nfcf_poll *nfcf_poll;
201 struct rf_tech_specific_params_nfcv_poll *nfcv_poll;
202 __u32 protocol;
203
204 if (rf_protocol == NCI_RF_PROTOCOL_T1T)
205 protocol = NFC_PROTO_JEWEL_MASK;
206 else if (rf_protocol == NCI_RF_PROTOCOL_T2T)
207 protocol = NFC_PROTO_MIFARE_MASK;
208 else if (rf_protocol == NCI_RF_PROTOCOL_ISO_DEP)
209 if (rf_tech_and_mode == NCI_NFC_A_PASSIVE_POLL_MODE)
210 protocol = NFC_PROTO_ISO14443_MASK;
211 else
212 protocol = NFC_PROTO_ISO14443_B_MASK;
213 else if (rf_protocol == NCI_RF_PROTOCOL_T3T)
214 protocol = NFC_PROTO_FELICA_MASK;
215 else if (rf_protocol == NCI_RF_PROTOCOL_NFC_DEP)
216 protocol = NFC_PROTO_NFC_DEP_MASK;
217 else if (rf_protocol == NCI_RF_PROTOCOL_T5T)
218 protocol = NFC_PROTO_ISO15693_MASK;
219 else
220 protocol = nci_get_prop_rf_protocol(ndev, rf_protocol);
221
222 if (!(protocol & ndev->poll_prots)) {
223 pr_err("the target found does not have the desired protocol\n");
224 return -EPROTO;
225 }
226
227 if (rf_tech_and_mode == NCI_NFC_A_PASSIVE_POLL_MODE) {
228 nfca_poll = (struct rf_tech_specific_params_nfca_poll *)params;
229
230 target->sens_res = nfca_poll->sens_res;
231 target->sel_res = nfca_poll->sel_res;
232 target->nfcid1_len = nfca_poll->nfcid1_len;
233 if (target->nfcid1_len > 0) {
234 memcpy(target->nfcid1, nfca_poll->nfcid1,
235 target->nfcid1_len);
236 }
237 } else if (rf_tech_and_mode == NCI_NFC_B_PASSIVE_POLL_MODE) {
238 nfcb_poll = (struct rf_tech_specific_params_nfcb_poll *)params;
239
240 target->sensb_res_len = nfcb_poll->sensb_res_len;
241 if (target->sensb_res_len > 0) {
242 memcpy(target->sensb_res, nfcb_poll->sensb_res,
243 target->sensb_res_len);
244 }
245 } else if (rf_tech_and_mode == NCI_NFC_F_PASSIVE_POLL_MODE) {
246 nfcf_poll = (struct rf_tech_specific_params_nfcf_poll *)params;
247
248 target->sensf_res_len = nfcf_poll->sensf_res_len;
249 if (target->sensf_res_len > 0) {
250 memcpy(target->sensf_res, nfcf_poll->sensf_res,
251 target->sensf_res_len);
252 }
253 } else if (rf_tech_and_mode == NCI_NFC_V_PASSIVE_POLL_MODE) {
254 nfcv_poll = (struct rf_tech_specific_params_nfcv_poll *)params;
255
256 target->is_iso15693 = 1;
257 target->iso15693_dsfid = nfcv_poll->dsfid;
258 memcpy(target->iso15693_uid, nfcv_poll->uid, NFC_ISO15693_UID_MAXSIZE);
259 } else {
260 pr_err("unsupported rf_tech_and_mode 0x%x\n", rf_tech_and_mode);
261 return -EPROTO;
262 }
263
264 target->supported_protocols |= protocol;
265
266 pr_debug("protocol 0x%x\n", protocol);
267
268 return 0;
269 }
270
271 static void nci_add_new_target(struct nci_dev *ndev,
272 struct nci_rf_discover_ntf *ntf)
273 {
274 struct nfc_target *target;
275 int i, rc;
276
277 for (i = 0; i < ndev->n_targets; i++) {
278 target = &ndev->targets[i];
279 if (target->logical_idx == ntf->rf_discovery_id) {
280 /* This target already exists, add the new protocol */
281 nci_add_new_protocol(ndev, target, ntf->rf_protocol,
282 ntf->rf_tech_and_mode,
283 &ntf->rf_tech_specific_params);
284 return;
285 }
286 }
287
288 /* This is a new target, check if we've enough room */
289 if (ndev->n_targets == NCI_MAX_DISCOVERED_TARGETS) {
290 pr_debug("not enough room, ignoring new target...\n");
291 return;
292 }
293
294 target = &ndev->targets[ndev->n_targets];
295
296 rc = nci_add_new_protocol(ndev, target, ntf->rf_protocol,
297 ntf->rf_tech_and_mode,
298 &ntf->rf_tech_specific_params);
299 if (!rc) {
300 target->logical_idx = ntf->rf_discovery_id;
301 ndev->n_targets++;
302
303 pr_debug("logical idx %d, n_targets %d\n", target->logical_idx,
304 ndev->n_targets);
305 }
306 }
307
308 void nci_clear_target_list(struct nci_dev *ndev)
309 {
310 memset(ndev->targets, 0,
311 (sizeof(struct nfc_target)*NCI_MAX_DISCOVERED_TARGETS));
312
313 ndev->n_targets = 0;
314 }
315
316 static void nci_rf_discover_ntf_packet(struct nci_dev *ndev,
317 struct sk_buff *skb)
318 {
319 struct nci_rf_discover_ntf ntf;
320 __u8 *data = skb->data;
321 bool add_target = true;
322
323 ntf.rf_discovery_id = *data++;
324 ntf.rf_protocol = *data++;
325 ntf.rf_tech_and_mode = *data++;
326 ntf.rf_tech_specific_params_len = *data++;
327
328 pr_debug("rf_discovery_id %d\n", ntf.rf_discovery_id);
329 pr_debug("rf_protocol 0x%x\n", ntf.rf_protocol);
330 pr_debug("rf_tech_and_mode 0x%x\n", ntf.rf_tech_and_mode);
331 pr_debug("rf_tech_specific_params_len %d\n",
332 ntf.rf_tech_specific_params_len);
333
334 if (ntf.rf_tech_specific_params_len > 0) {
335 switch (ntf.rf_tech_and_mode) {
336 case NCI_NFC_A_PASSIVE_POLL_MODE:
337 data = nci_extract_rf_params_nfca_passive_poll(ndev,
338 &(ntf.rf_tech_specific_params.nfca_poll), data);
339 break;
340
341 case NCI_NFC_B_PASSIVE_POLL_MODE:
342 data = nci_extract_rf_params_nfcb_passive_poll(ndev,
343 &(ntf.rf_tech_specific_params.nfcb_poll), data);
344 break;
345
346 case NCI_NFC_F_PASSIVE_POLL_MODE:
347 data = nci_extract_rf_params_nfcf_passive_poll(ndev,
348 &(ntf.rf_tech_specific_params.nfcf_poll), data);
349 break;
350
351 case NCI_NFC_V_PASSIVE_POLL_MODE:
352 data = nci_extract_rf_params_nfcv_passive_poll(ndev,
353 &(ntf.rf_tech_specific_params.nfcv_poll), data);
354 break;
355
356 default:
357 pr_err("unsupported rf_tech_and_mode 0x%x\n",
358 ntf.rf_tech_and_mode);
359 data += ntf.rf_tech_specific_params_len;
360 add_target = false;
361 }
362 }
363
364 ntf.ntf_type = *data++;
365 pr_debug("ntf_type %d\n", ntf.ntf_type);
366
367 if (add_target == true)
368 nci_add_new_target(ndev, &ntf);
369
370 if (ntf.ntf_type == NCI_DISCOVER_NTF_TYPE_MORE) {
371 atomic_set(&ndev->state, NCI_W4_ALL_DISCOVERIES);
372 } else {
373 atomic_set(&ndev->state, NCI_W4_HOST_SELECT);
374 nfc_targets_found(ndev->nfc_dev, ndev->targets,
375 ndev->n_targets);
376 }
377 }
378
379 static int nci_extract_activation_params_iso_dep(struct nci_dev *ndev,
380 struct nci_rf_intf_activated_ntf *ntf, __u8 *data)
381 {
382 struct activation_params_nfca_poll_iso_dep *nfca_poll;
383 struct activation_params_nfcb_poll_iso_dep *nfcb_poll;
384
385 switch (ntf->activation_rf_tech_and_mode) {
386 case NCI_NFC_A_PASSIVE_POLL_MODE:
387 nfca_poll = &ntf->activation_params.nfca_poll_iso_dep;
388 nfca_poll->rats_res_len = min_t(__u8, *data++, 20);
389 pr_debug("rats_res_len %d\n", nfca_poll->rats_res_len);
390 if (nfca_poll->rats_res_len > 0) {
391 memcpy(nfca_poll->rats_res,
392 data, nfca_poll->rats_res_len);
393 }
394 break;
395
396 case NCI_NFC_B_PASSIVE_POLL_MODE:
397 nfcb_poll = &ntf->activation_params.nfcb_poll_iso_dep;
398 nfcb_poll->attrib_res_len = min_t(__u8, *data++, 50);
399 pr_debug("attrib_res_len %d\n", nfcb_poll->attrib_res_len);
400 if (nfcb_poll->attrib_res_len > 0) {
401 memcpy(nfcb_poll->attrib_res,
402 data, nfcb_poll->attrib_res_len);
403 }
404 break;
405
406 default:
407 pr_err("unsupported activation_rf_tech_and_mode 0x%x\n",
408 ntf->activation_rf_tech_and_mode);
409 return NCI_STATUS_RF_PROTOCOL_ERROR;
410 }
411
412 return NCI_STATUS_OK;
413 }
414
415 static int nci_extract_activation_params_nfc_dep(struct nci_dev *ndev,
416 struct nci_rf_intf_activated_ntf *ntf, __u8 *data)
417 {
418 struct activation_params_poll_nfc_dep *poll;
419 struct activation_params_listen_nfc_dep *listen;
420
421 switch (ntf->activation_rf_tech_and_mode) {
422 case NCI_NFC_A_PASSIVE_POLL_MODE:
423 case NCI_NFC_F_PASSIVE_POLL_MODE:
424 poll = &ntf->activation_params.poll_nfc_dep;
425 poll->atr_res_len = min_t(__u8, *data++,
426 NFC_ATR_RES_MAXSIZE - 2);
427 pr_debug("atr_res_len %d\n", poll->atr_res_len);
428 if (poll->atr_res_len > 0)
429 memcpy(poll->atr_res, data, poll->atr_res_len);
430 break;
431
432 case NCI_NFC_A_PASSIVE_LISTEN_MODE:
433 case NCI_NFC_F_PASSIVE_LISTEN_MODE:
434 listen = &ntf->activation_params.listen_nfc_dep;
435 listen->atr_req_len = min_t(__u8, *data++,
436 NFC_ATR_REQ_MAXSIZE - 2);
437 pr_debug("atr_req_len %d\n", listen->atr_req_len);
438 if (listen->atr_req_len > 0)
439 memcpy(listen->atr_req, data, listen->atr_req_len);
440 break;
441
442 default:
443 pr_err("unsupported activation_rf_tech_and_mode 0x%x\n",
444 ntf->activation_rf_tech_and_mode);
445 return NCI_STATUS_RF_PROTOCOL_ERROR;
446 }
447
448 return NCI_STATUS_OK;
449 }
450
451 static void nci_target_auto_activated(struct nci_dev *ndev,
452 struct nci_rf_intf_activated_ntf *ntf)
453 {
454 struct nfc_target *target;
455 int rc;
456
457 target = &ndev->targets[ndev->n_targets];
458
459 rc = nci_add_new_protocol(ndev, target, ntf->rf_protocol,
460 ntf->activation_rf_tech_and_mode,
461 &ntf->rf_tech_specific_params);
462 if (rc)
463 return;
464
465 target->logical_idx = ntf->rf_discovery_id;
466 ndev->n_targets++;
467
468 pr_debug("logical idx %d, n_targets %d\n",
469 target->logical_idx, ndev->n_targets);
470
471 nfc_targets_found(ndev->nfc_dev, ndev->targets, ndev->n_targets);
472 }
473
474 static int nci_store_general_bytes_nfc_dep(struct nci_dev *ndev,
475 struct nci_rf_intf_activated_ntf *ntf)
476 {
477 ndev->remote_gb_len = 0;
478
479 if (ntf->activation_params_len <= 0)
480 return NCI_STATUS_OK;
481
482 switch (ntf->activation_rf_tech_and_mode) {
483 case NCI_NFC_A_PASSIVE_POLL_MODE:
484 case NCI_NFC_F_PASSIVE_POLL_MODE:
485 ndev->remote_gb_len = min_t(__u8,
486 (ntf->activation_params.poll_nfc_dep.atr_res_len
487 - NFC_ATR_RES_GT_OFFSET),
488 NFC_ATR_RES_GB_MAXSIZE);
489 memcpy(ndev->remote_gb,
490 (ntf->activation_params.poll_nfc_dep.atr_res
491 + NFC_ATR_RES_GT_OFFSET),
492 ndev->remote_gb_len);
493 break;
494
495 case NCI_NFC_A_PASSIVE_LISTEN_MODE:
496 case NCI_NFC_F_PASSIVE_LISTEN_MODE:
497 ndev->remote_gb_len = min_t(__u8,
498 (ntf->activation_params.listen_nfc_dep.atr_req_len
499 - NFC_ATR_REQ_GT_OFFSET),
500 NFC_ATR_REQ_GB_MAXSIZE);
501 memcpy(ndev->remote_gb,
502 (ntf->activation_params.listen_nfc_dep.atr_req
503 + NFC_ATR_REQ_GT_OFFSET),
504 ndev->remote_gb_len);
505 break;
506
507 default:
508 pr_err("unsupported activation_rf_tech_and_mode 0x%x\n",
509 ntf->activation_rf_tech_and_mode);
510 return NCI_STATUS_RF_PROTOCOL_ERROR;
511 }
512
513 return NCI_STATUS_OK;
514 }
515
516 static void nci_rf_intf_activated_ntf_packet(struct nci_dev *ndev,
517 struct sk_buff *skb)
518 {
519 struct nci_conn_info *conn_info;
520 struct nci_rf_intf_activated_ntf ntf;
521 __u8 *data = skb->data;
522 int err = NCI_STATUS_OK;
523
524 ntf.rf_discovery_id = *data++;
525 ntf.rf_interface = *data++;
526 ntf.rf_protocol = *data++;
527 ntf.activation_rf_tech_and_mode = *data++;
528 ntf.max_data_pkt_payload_size = *data++;
529 ntf.initial_num_credits = *data++;
530 ntf.rf_tech_specific_params_len = *data++;
531
532 pr_debug("rf_discovery_id %d\n", ntf.rf_discovery_id);
533 pr_debug("rf_interface 0x%x\n", ntf.rf_interface);
534 pr_debug("rf_protocol 0x%x\n", ntf.rf_protocol);
535 pr_debug("activation_rf_tech_and_mode 0x%x\n",
536 ntf.activation_rf_tech_and_mode);
537 pr_debug("max_data_pkt_payload_size 0x%x\n",
538 ntf.max_data_pkt_payload_size);
539 pr_debug("initial_num_credits 0x%x\n",
540 ntf.initial_num_credits);
541 pr_debug("rf_tech_specific_params_len %d\n",
542 ntf.rf_tech_specific_params_len);
543
544 /* If this contains a value of 0x00 (NFCEE Direct RF
545 * Interface) then all following parameters SHALL contain a
546 * value of 0 and SHALL be ignored.
547 */
548 if (ntf.rf_interface == NCI_RF_INTERFACE_NFCEE_DIRECT)
549 goto listen;
550
551 if (ntf.rf_tech_specific_params_len > 0) {
552 switch (ntf.activation_rf_tech_and_mode) {
553 case NCI_NFC_A_PASSIVE_POLL_MODE:
554 data = nci_extract_rf_params_nfca_passive_poll(ndev,
555 &(ntf.rf_tech_specific_params.nfca_poll), data);
556 break;
557
558 case NCI_NFC_B_PASSIVE_POLL_MODE:
559 data = nci_extract_rf_params_nfcb_passive_poll(ndev,
560 &(ntf.rf_tech_specific_params.nfcb_poll), data);
561 break;
562
563 case NCI_NFC_F_PASSIVE_POLL_MODE:
564 data = nci_extract_rf_params_nfcf_passive_poll(ndev,
565 &(ntf.rf_tech_specific_params.nfcf_poll), data);
566 break;
567
568 case NCI_NFC_V_PASSIVE_POLL_MODE:
569 data = nci_extract_rf_params_nfcv_passive_poll(ndev,
570 &(ntf.rf_tech_specific_params.nfcv_poll), data);
571 break;
572
573 case NCI_NFC_A_PASSIVE_LISTEN_MODE:
574 /* no RF technology specific parameters */
575 break;
576
577 case NCI_NFC_F_PASSIVE_LISTEN_MODE:
578 data = nci_extract_rf_params_nfcf_passive_listen(ndev,
579 &(ntf.rf_tech_specific_params.nfcf_listen),
580 data);
581 break;
582
583 default:
584 pr_err("unsupported activation_rf_tech_and_mode 0x%x\n",
585 ntf.activation_rf_tech_and_mode);
586 err = NCI_STATUS_RF_PROTOCOL_ERROR;
587 goto exit;
588 }
589 }
590
591 ntf.data_exch_rf_tech_and_mode = *data++;
592 ntf.data_exch_tx_bit_rate = *data++;
593 ntf.data_exch_rx_bit_rate = *data++;
594 ntf.activation_params_len = *data++;
595
596 pr_debug("data_exch_rf_tech_and_mode 0x%x\n",
597 ntf.data_exch_rf_tech_and_mode);
598 pr_debug("data_exch_tx_bit_rate 0x%x\n", ntf.data_exch_tx_bit_rate);
599 pr_debug("data_exch_rx_bit_rate 0x%x\n", ntf.data_exch_rx_bit_rate);
600 pr_debug("activation_params_len %d\n", ntf.activation_params_len);
601
602 if (ntf.activation_params_len > 0) {
603 switch (ntf.rf_interface) {
604 case NCI_RF_INTERFACE_ISO_DEP:
605 err = nci_extract_activation_params_iso_dep(ndev,
606 &ntf, data);
607 break;
608
609 case NCI_RF_INTERFACE_NFC_DEP:
610 err = nci_extract_activation_params_nfc_dep(ndev,
611 &ntf, data);
612 break;
613
614 case NCI_RF_INTERFACE_FRAME:
615 /* no activation params */
616 break;
617
618 default:
619 pr_err("unsupported rf_interface 0x%x\n",
620 ntf.rf_interface);
621 err = NCI_STATUS_RF_PROTOCOL_ERROR;
622 break;
623 }
624 }
625
626 exit:
627 if (err == NCI_STATUS_OK) {
628 conn_info = ndev->rf_conn_info;
629 if (!conn_info)
630 return;
631
632 conn_info->max_pkt_payload_len = ntf.max_data_pkt_payload_size;
633 conn_info->initial_num_credits = ntf.initial_num_credits;
634
635 /* set the available credits to initial value */
636 atomic_set(&conn_info->credits_cnt,
637 conn_info->initial_num_credits);
638
639 /* store general bytes to be reported later in dep_link_up */
640 if (ntf.rf_interface == NCI_RF_INTERFACE_NFC_DEP) {
641 err = nci_store_general_bytes_nfc_dep(ndev, &ntf);
642 if (err != NCI_STATUS_OK)
643 pr_err("unable to store general bytes\n");
644 }
645 }
646
647 if (!(ntf.activation_rf_tech_and_mode & NCI_RF_TECH_MODE_LISTEN_MASK)) {
648 /* Poll mode */
649 if (atomic_read(&ndev->state) == NCI_DISCOVERY) {
650 /* A single target was found and activated
651 * automatically */
652 atomic_set(&ndev->state, NCI_POLL_ACTIVE);
653 if (err == NCI_STATUS_OK)
654 nci_target_auto_activated(ndev, &ntf);
655 } else { /* ndev->state == NCI_W4_HOST_SELECT */
656 /* A selected target was activated, so complete the
657 * request */
658 atomic_set(&ndev->state, NCI_POLL_ACTIVE);
659 nci_req_complete(ndev, err);
660 }
661 } else {
662 listen:
663 /* Listen mode */
664 atomic_set(&ndev->state, NCI_LISTEN_ACTIVE);
665 if (err == NCI_STATUS_OK &&
666 ntf.rf_protocol == NCI_RF_PROTOCOL_NFC_DEP) {
667 err = nfc_tm_activated(ndev->nfc_dev,
668 NFC_PROTO_NFC_DEP_MASK,
669 NFC_COMM_PASSIVE,
670 ndev->remote_gb,
671 ndev->remote_gb_len);
672 if (err != NCI_STATUS_OK)
673 pr_err("error when signaling tm activation\n");
674 }
675 }
676 }
677
678 static void nci_rf_deactivate_ntf_packet(struct nci_dev *ndev,
679 struct sk_buff *skb)
680 {
681 struct nci_conn_info *conn_info;
682 struct nci_rf_deactivate_ntf *ntf = (void *) skb->data;
683
684 pr_debug("entry, type 0x%x, reason 0x%x\n", ntf->type, ntf->reason);
685
686 conn_info = ndev->rf_conn_info;
687 if (!conn_info)
688 return;
689
690 /* drop tx data queue */
691 skb_queue_purge(&ndev->tx_q);
692
693 /* drop partial rx data packet */
694 if (ndev->rx_data_reassembly) {
695 kfree_skb(ndev->rx_data_reassembly);
696 ndev->rx_data_reassembly = NULL;
697 }
698
699 /* complete the data exchange transaction, if exists */
700 if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags))
701 nci_data_exchange_complete(ndev, NULL, NCI_STATIC_RF_CONN_ID,
702 -EIO);
703
704 switch (ntf->type) {
705 case NCI_DEACTIVATE_TYPE_IDLE_MODE:
706 nci_clear_target_list(ndev);
707 atomic_set(&ndev->state, NCI_IDLE);
708 break;
709 case NCI_DEACTIVATE_TYPE_SLEEP_MODE:
710 case NCI_DEACTIVATE_TYPE_SLEEP_AF_MODE:
711 atomic_set(&ndev->state, NCI_W4_HOST_SELECT);
712 break;
713 case NCI_DEACTIVATE_TYPE_DISCOVERY:
714 nci_clear_target_list(ndev);
715 atomic_set(&ndev->state, NCI_DISCOVERY);
716 break;
717 }
718
719 nci_req_complete(ndev, NCI_STATUS_OK);
720 }
721
722 static void nci_nfcee_discover_ntf_packet(struct nci_dev *ndev,
723 struct sk_buff *skb)
724 {
725 u8 status = NCI_STATUS_OK;
726 struct nci_nfcee_discover_ntf *nfcee_ntf =
727 (struct nci_nfcee_discover_ntf *)skb->data;
728
729 pr_debug("\n");
730
731 /* NFCForum NCI 9.2.1 HCI Network Specific Handling
732 * If the NFCC supports the HCI Network, it SHALL return one,
733 * and only one, NFCEE_DISCOVER_NTF with a Protocol type of
734 * “HCI Access”, even if the HCI Network contains multiple NFCEEs.
735 */
736 ndev->hci_dev->nfcee_id = nfcee_ntf->nfcee_id;
737 ndev->cur_params.id = nfcee_ntf->nfcee_id;
738
739 nci_req_complete(ndev, status);
740 }
741
742 static void nci_nfcee_action_ntf_packet(struct nci_dev *ndev,
743 struct sk_buff *skb)
744 {
745 pr_debug("\n");
746 }
747
748 void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb)
749 {
750 __u16 ntf_opcode = nci_opcode(skb->data);
751
752 pr_debug("NCI RX: MT=ntf, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n",
753 nci_pbf(skb->data),
754 nci_opcode_gid(ntf_opcode),
755 nci_opcode_oid(ntf_opcode),
756 nci_plen(skb->data));
757
758 /* strip the nci control header */
759 skb_pull(skb, NCI_CTRL_HDR_SIZE);
760
761 if (nci_opcode_gid(ntf_opcode) == NCI_GID_PROPRIETARY) {
762 if (nci_prop_ntf_packet(ndev, ntf_opcode, skb) == -ENOTSUPP) {
763 pr_err("unsupported ntf opcode 0x%x\n",
764 ntf_opcode);
765 }
766
767 goto end;
768 }
769
770 switch (ntf_opcode) {
771 case NCI_OP_CORE_CONN_CREDITS_NTF:
772 nci_core_conn_credits_ntf_packet(ndev, skb);
773 break;
774
775 case NCI_OP_CORE_GENERIC_ERROR_NTF:
776 nci_core_generic_error_ntf_packet(ndev, skb);
777 break;
778
779 case NCI_OP_CORE_INTF_ERROR_NTF:
780 nci_core_conn_intf_error_ntf_packet(ndev, skb);
781 break;
782
783 case NCI_OP_RF_DISCOVER_NTF:
784 nci_rf_discover_ntf_packet(ndev, skb);
785 break;
786
787 case NCI_OP_RF_INTF_ACTIVATED_NTF:
788 nci_rf_intf_activated_ntf_packet(ndev, skb);
789 break;
790
791 case NCI_OP_RF_DEACTIVATE_NTF:
792 nci_rf_deactivate_ntf_packet(ndev, skb);
793 break;
794
795 case NCI_OP_NFCEE_DISCOVER_NTF:
796 nci_nfcee_discover_ntf_packet(ndev, skb);
797 break;
798
799 case NCI_OP_RF_NFCEE_ACTION_NTF:
800 nci_nfcee_action_ntf_packet(ndev, skb);
801 break;
802
803 default:
804 pr_err("unknown ntf opcode 0x%x\n", ntf_opcode);
805 break;
806 }
807
808 nci_core_ntf_packet(ndev, ntf_opcode, skb);
809 end:
810 kfree_skb(skb);
811 }
Linux kernel - Deliverables
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