1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * The NFC Controller Interface is the communication protocol between an
4 * NFC Controller (NFCC) and a Device Host (DH).
5 *
6 * Copyright (C) 2014 Marvell International Ltd.
7 * Copyright (C) 2011 Texas Instruments, Inc.
8 *
9 * Written by Ilan Elias <ilane@ti.com>
10 *
11 * Acknowledgements:
12 * This file is based on hci_event.c, which was written
13 * by Maxim Krasnyansky.
14 */
15
16 #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
17
18 #include <linux/types.h>
19 #include <linux/interrupt.h>
20 #include <linux/bitops.h>
21 #include <linux/skbuff.h>
22
23 #include "../nfc.h"
24 #include <net/nfc/nci.h>
25 #include <net/nfc/nci_core.h>
26 #include <linux/nfc.h>
27
28 /* Handle NCI Notification packets */
29
30 static void nci_core_reset_ntf_packet(struct nci_dev *ndev,
31 const struct sk_buff *skb)
32 {
33 /* Handle NCI 2.x core reset notification */
34 const struct nci_core_reset_ntf *ntf = (void *)skb->data;
35
36 ndev->nci_ver = ntf->nci_ver;
37 pr_debug("nci_ver 0x%x, config_status 0x%x\n",
38 ntf->nci_ver, ntf->config_status);
39
40 ndev->manufact_id = ntf->manufact_id;
41 ndev->manufact_specific_info =
42 __le32_to_cpu(ntf->manufact_specific_info);
43
44 nci_req_complete(ndev, NCI_STATUS_OK);
45 }
46
47 static void nci_core_conn_credits_ntf_packet(struct nci_dev *ndev,
48 struct sk_buff *skb)
49 {
50 struct nci_core_conn_credit_ntf *ntf = (void *) skb->data;
51 struct nci_conn_info *conn_info;
52 int i;
53
54 pr_debug("num_entries %d\n", ntf->num_entries);
55
56 if (ntf->num_entries > NCI_MAX_NUM_CONN)
57 ntf->num_entries = NCI_MAX_NUM_CONN;
58
59 /* update the credits */
60 for (i = 0; i < ntf->num_entries; i++) {
61 ntf->conn_entries[i].conn_id =
62 nci_conn_id(&ntf->conn_entries[i].conn_id);
63
64 pr_debug("entry[%d]: conn_id %d, credits %d\n",
65 i, ntf->conn_entries[i].conn_id,
66 ntf->conn_entries[i].credits);
67
68 conn_info = nci_get_conn_info_by_conn_id(ndev,
69 ntf->conn_entries[i].conn_id);
70 if (!conn_info)
71 return;
72
73 atomic_add(ntf->conn_entries[i].credits,
74 &conn_info->credits_cnt);
75 }
76
77 /* trigger the next tx */
78 if (!skb_queue_empty(&ndev->tx_q))
79 queue_work(ndev->tx_wq, &ndev->tx_work);
80 }
81
82 static void nci_core_generic_error_ntf_packet(struct nci_dev *ndev,
83 const struct sk_buff *skb)
84 {
85 __u8 status = skb->data[0];
86
87 pr_debug("status 0x%x\n", status);
88
89 if (atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) {
90 /* Activation failed, so complete the request
91 (the state remains the same) */
92 nci_req_complete(ndev, status);
93 }
94 }
95
96 static void nci_core_conn_intf_error_ntf_packet(struct nci_dev *ndev,
97 struct sk_buff *skb)
98 {
99 struct nci_core_intf_error_ntf *ntf = (void *) skb->data;
100
101 ntf->conn_id = nci_conn_id(&ntf->conn_id);
102
103 pr_debug("status 0x%x, conn_id %d\n", ntf->status, ntf->conn_id);
104
105 /* complete the data exchange transaction, if exists */
106 if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags))
107 nci_data_exchange_complete(ndev, NULL, ntf->conn_id, -EIO);
108 }
109
110 static const __u8 *
111 nci_extract_rf_params_nfca_passive_poll(struct nci_dev *ndev,
112 struct rf_tech_specific_params_nfca_poll *nfca_poll,
113 const __u8 *data)
114 {
115 nfca_poll->sens_res = __le16_to_cpu(*((__le16 *)data));
116 data += 2;
117
118 nfca_poll->nfcid1_len = min_t(__u8, *data++, NFC_NFCID1_MAXSIZE);
119
120 pr_debug("sens_res 0x%x, nfcid1_len %d\n",
121 nfca_poll->sens_res, nfca_poll->nfcid1_len);
122
123 memcpy(nfca_poll->nfcid1, data, nfca_poll->nfcid1_len);
124 data += nfca_poll->nfcid1_len;
125
126 nfca_poll->sel_res_len = *data++;
127
128 if (nfca_poll->sel_res_len != 0)
129 nfca_poll->sel_res = *data++;
130
131 pr_debug("sel_res_len %d, sel_res 0x%x\n",
132 nfca_poll->sel_res_len,
133 nfca_poll->sel_res);
134
135 return data;
136 }
137
138 static const __u8 *
139 nci_extract_rf_params_nfcb_passive_poll(struct nci_dev *ndev,
140 struct rf_tech_specific_params_nfcb_poll *nfcb_poll,
141 const __u8 *data)
142 {
143 nfcb_poll->sensb_res_len = min_t(__u8, *data++, NFC_SENSB_RES_MAXSIZE);
144
145 pr_debug("sensb_res_len %d\n", nfcb_poll->sensb_res_len);
146
147 memcpy(nfcb_poll->sensb_res, data, nfcb_poll->sensb_res_len);
148 data += nfcb_poll->sensb_res_len;
149
150 return data;
151 }
152
153 static const __u8 *
154 nci_extract_rf_params_nfcf_passive_poll(struct nci_dev *ndev,
155 struct rf_tech_specific_params_nfcf_poll *nfcf_poll,
156 const __u8 *data)
157 {
158 nfcf_poll->bit_rate = *data++;
159 nfcf_poll->sensf_res_len = min_t(__u8, *data++, NFC_SENSF_RES_MAXSIZE);
160
161 pr_debug("bit_rate %d, sensf_res_len %d\n",
162 nfcf_poll->bit_rate, nfcf_poll->sensf_res_len);
163
164 memcpy(nfcf_poll->sensf_res, data, nfcf_poll->sensf_res_len);
165 data += nfcf_poll->sensf_res_len;
166
167 return data;
168 }
169
170 static const __u8 *
171 nci_extract_rf_params_nfcv_passive_poll(struct nci_dev *ndev,
172 struct rf_tech_specific_params_nfcv_poll *nfcv_poll,
173 const __u8 *data)
174 {
175 ++data;
176 nfcv_poll->dsfid = *data++;
177 memcpy(nfcv_poll->uid, data, NFC_ISO15693_UID_MAXSIZE);
178 data += NFC_ISO15693_UID_MAXSIZE;
179 return data;
180 }
181
182 static const __u8 *
183 nci_extract_rf_params_nfcf_passive_listen(struct nci_dev *ndev,
184 struct rf_tech_specific_params_nfcf_listen *nfcf_listen,
185 const __u8 *data)
186 {
187 nfcf_listen->local_nfcid2_len = min_t(__u8, *data++,
188 NFC_NFCID2_MAXSIZE);
189 memcpy(nfcf_listen->local_nfcid2, data, nfcf_listen->local_nfcid2_len);
190 data += nfcf_listen->local_nfcid2_len;
191
192 return data;
193 }
194
195 static __u32 nci_get_prop_rf_protocol(struct nci_dev *ndev, __u8 rf_protocol)
196 {
197 if (ndev->ops->get_rfprotocol)
198 return ndev->ops->get_rfprotocol(ndev, rf_protocol);
199 return 0;
200 }
201
202 static int nci_add_new_protocol(struct nci_dev *ndev,
203 struct nfc_target *target,
204 __u8 rf_protocol,
205 __u8 rf_tech_and_mode,
206 const void *params)
207 {
208 const struct rf_tech_specific_params_nfca_poll *nfca_poll;
209 const struct rf_tech_specific_params_nfcb_poll *nfcb_poll;
210 const struct rf_tech_specific_params_nfcf_poll *nfcf_poll;
211 const struct rf_tech_specific_params_nfcv_poll *nfcv_poll;
212 __u32 protocol;
213
214 if (rf_protocol == NCI_RF_PROTOCOL_T1T)
215 protocol = NFC_PROTO_JEWEL_MASK;
216 else if (rf_protocol == NCI_RF_PROTOCOL_T2T)
217 protocol = NFC_PROTO_MIFARE_MASK;
218 else if (rf_protocol == NCI_RF_PROTOCOL_ISO_DEP)
219 if (rf_tech_and_mode == NCI_NFC_A_PASSIVE_POLL_MODE)
220 protocol = NFC_PROTO_ISO14443_MASK;
221 else
222 protocol = NFC_PROTO_ISO14443_B_MASK;
223 else if (rf_protocol == NCI_RF_PROTOCOL_T3T)
224 protocol = NFC_PROTO_FELICA_MASK;
225 else if (rf_protocol == NCI_RF_PROTOCOL_NFC_DEP)
226 protocol = NFC_PROTO_NFC_DEP_MASK;
227 else if (rf_protocol == NCI_RF_PROTOCOL_T5T)
228 protocol = NFC_PROTO_ISO15693_MASK;
229 else
230 protocol = nci_get_prop_rf_protocol(ndev, rf_protocol);
231
232 if (!(protocol & ndev->poll_prots)) {
233 pr_err("the target found does not have the desired protocol\n");
234 return -EPROTO;
235 }
236
237 if (rf_tech_and_mode == NCI_NFC_A_PASSIVE_POLL_MODE) {
238 nfca_poll = (struct rf_tech_specific_params_nfca_poll *)params;
239
240 target->sens_res = nfca_poll->sens_res;
241 target->sel_res = nfca_poll->sel_res;
242 target->nfcid1_len = nfca_poll->nfcid1_len;
243 if (target->nfcid1_len > ARRAY_SIZE(target->nfcid1))
244 return -EPROTO;
245 if (target->nfcid1_len > 0) {
246 memcpy(target->nfcid1, nfca_poll->nfcid1,
247 target->nfcid1_len);
248 }
249 } else if (rf_tech_and_mode == NCI_NFC_B_PASSIVE_POLL_MODE) {
250 nfcb_poll = (struct rf_tech_specific_params_nfcb_poll *)params;
251
252 target->sensb_res_len = nfcb_poll->sensb_res_len;
253 if (target->sensb_res_len > ARRAY_SIZE(target->sensb_res))
254 return -EPROTO;
255 if (target->sensb_res_len > 0) {
256 memcpy(target->sensb_res, nfcb_poll->sensb_res,
257 target->sensb_res_len);
258 }
259 } else if (rf_tech_and_mode == NCI_NFC_F_PASSIVE_POLL_MODE) {
260 nfcf_poll = (struct rf_tech_specific_params_nfcf_poll *)params;
261
262 target->sensf_res_len = nfcf_poll->sensf_res_len;
263 if (target->sensf_res_len > ARRAY_SIZE(target->sensf_res))
264 return -EPROTO;
265 if (target->sensf_res_len > 0) {
266 memcpy(target->sensf_res, nfcf_poll->sensf_res,
267 target->sensf_res_len);
268 }
269 } else if (rf_tech_and_mode == NCI_NFC_V_PASSIVE_POLL_MODE) {
270 nfcv_poll = (struct rf_tech_specific_params_nfcv_poll *)params;
271
272 target->is_iso15693 = 1;
273 target->iso15693_dsfid = nfcv_poll->dsfid;
274 memcpy(target->iso15693_uid, nfcv_poll->uid, NFC_ISO15693_UID_MAXSIZE);
275 } else {
276 pr_err("unsupported rf_tech_and_mode 0x%x\n", rf_tech_and_mode);
277 return -EPROTO;
278 }
279
280 target->supported_protocols |= protocol;
281
282 pr_debug("protocol 0x%x\n", protocol);
283
284 return 0;
285 }
286
287 static void nci_add_new_target(struct nci_dev *ndev,
288 const struct nci_rf_discover_ntf *ntf)
289 {
290 struct nfc_target *target;
291 int i, rc;
292
293 for (i = 0; i < ndev->n_targets; i++) {
294 target = &ndev->targets[i];
295 if (target->logical_idx == ntf->rf_discovery_id) {
296 /* This target already exists, add the new protocol */
297 nci_add_new_protocol(ndev, target, ntf->rf_protocol,
298 ntf->rf_tech_and_mode,
299 &ntf->rf_tech_specific_params);
300 return;
301 }
302 }
303
304 /* This is a new target, check if we've enough room */
305 if (ndev->n_targets == NCI_MAX_DISCOVERED_TARGETS) {
306 pr_debug("not enough room, ignoring new target...\n");
307 return;
308 }
309
310 target = &ndev->targets[ndev->n_targets];
311
312 rc = nci_add_new_protocol(ndev, target, ntf->rf_protocol,
313 ntf->rf_tech_and_mode,
314 &ntf->rf_tech_specific_params);
315 if (!rc) {
316 target->logical_idx = ntf->rf_discovery_id;
317 ndev->n_targets++;
318
319 pr_debug("logical idx %d, n_targets %d\n", target->logical_idx,
320 ndev->n_targets);
321 }
322 }
323
324 void nci_clear_target_list(struct nci_dev *ndev)
325 {
326 memset(ndev->targets, 0,
327 (sizeof(struct nfc_target)*NCI_MAX_DISCOVERED_TARGETS));
328
329 ndev->n_targets = 0;
330 }
331
332 static void nci_rf_discover_ntf_packet(struct nci_dev *ndev,
333 const struct sk_buff *skb)
334 {
335 struct nci_rf_discover_ntf ntf;
336 const __u8 *data = skb->data;
337 bool add_target = true;
338
339 ntf.rf_discovery_id = *data++;
340 ntf.rf_protocol = *data++;
341 ntf.rf_tech_and_mode = *data++;
342 ntf.rf_tech_specific_params_len = *data++;
343
344 pr_debug("rf_discovery_id %d\n", ntf.rf_discovery_id);
345 pr_debug("rf_protocol 0x%x\n", ntf.rf_protocol);
346 pr_debug("rf_tech_and_mode 0x%x\n", ntf.rf_tech_and_mode);
347 pr_debug("rf_tech_specific_params_len %d\n",
348 ntf.rf_tech_specific_params_len);
349
350 if (ntf.rf_tech_specific_params_len > 0) {
351 switch (ntf.rf_tech_and_mode) {
352 case NCI_NFC_A_PASSIVE_POLL_MODE:
353 data = nci_extract_rf_params_nfca_passive_poll(ndev,
354 &(ntf.rf_tech_specific_params.nfca_poll), data);
355 break;
356
357 case NCI_NFC_B_PASSIVE_POLL_MODE:
358 data = nci_extract_rf_params_nfcb_passive_poll(ndev,
359 &(ntf.rf_tech_specific_params.nfcb_poll), data);
360 break;
361
362 case NCI_NFC_F_PASSIVE_POLL_MODE:
363 data = nci_extract_rf_params_nfcf_passive_poll(ndev,
364 &(ntf.rf_tech_specific_params.nfcf_poll), data);
365 break;
366
367 case NCI_NFC_V_PASSIVE_POLL_MODE:
368 data = nci_extract_rf_params_nfcv_passive_poll(ndev,
369 &(ntf.rf_tech_specific_params.nfcv_poll), data);
370 break;
371
372 default:
373 pr_err("unsupported rf_tech_and_mode 0x%x\n",
374 ntf.rf_tech_and_mode);
375 data += ntf.rf_tech_specific_params_len;
376 add_target = false;
377 }
378 }
379
380 ntf.ntf_type = *data++;
381 pr_debug("ntf_type %d\n", ntf.ntf_type);
382
383 if (add_target == true)
384 nci_add_new_target(ndev, &ntf);
385
386 if (ntf.ntf_type == NCI_DISCOVER_NTF_TYPE_MORE) {
387 atomic_set(&ndev->state, NCI_W4_ALL_DISCOVERIES);
388 } else {
389 atomic_set(&ndev->state, NCI_W4_HOST_SELECT);
390 nfc_targets_found(ndev->nfc_dev, ndev->targets,
391 ndev->n_targets);
392 }
393 }
394
395 static int nci_extract_activation_params_iso_dep(struct nci_dev *ndev,
396 struct nci_rf_intf_activated_ntf *ntf,
397 const __u8 *data)
398 {
399 struct activation_params_nfca_poll_iso_dep *nfca_poll;
400 struct activation_params_nfcb_poll_iso_dep *nfcb_poll;
401
402 switch (ntf->activation_rf_tech_and_mode) {
403 case NCI_NFC_A_PASSIVE_POLL_MODE:
404 nfca_poll = &ntf->activation_params.nfca_poll_iso_dep;
405 nfca_poll->rats_res_len = min_t(__u8, *data++, 20);
406 pr_debug("rats_res_len %d\n", nfca_poll->rats_res_len);
407 if (nfca_poll->rats_res_len > 0) {
408 memcpy(nfca_poll->rats_res,
409 data, nfca_poll->rats_res_len);
410 }
411 break;
412
413 case NCI_NFC_B_PASSIVE_POLL_MODE:
414 nfcb_poll = &ntf->activation_params.nfcb_poll_iso_dep;
415 nfcb_poll->attrib_res_len = min_t(__u8, *data++, 50);
416 pr_debug("attrib_res_len %d\n", nfcb_poll->attrib_res_len);
417 if (nfcb_poll->attrib_res_len > 0) {
418 memcpy(nfcb_poll->attrib_res,
419 data, nfcb_poll->attrib_res_len);
420 }
421 break;
422
423 default:
424 pr_err("unsupported activation_rf_tech_and_mode 0x%x\n",
425 ntf->activation_rf_tech_and_mode);
426 return NCI_STATUS_RF_PROTOCOL_ERROR;
427 }
428
429 return NCI_STATUS_OK;
430 }
431
432 static int nci_extract_activation_params_nfc_dep(struct nci_dev *ndev,
433 struct nci_rf_intf_activated_ntf *ntf,
434 const __u8 *data)
435 {
436 struct activation_params_poll_nfc_dep *poll;
437 struct activation_params_listen_nfc_dep *listen;
438
439 switch (ntf->activation_rf_tech_and_mode) {
440 case NCI_NFC_A_PASSIVE_POLL_MODE:
441 case NCI_NFC_F_PASSIVE_POLL_MODE:
442 poll = &ntf->activation_params.poll_nfc_dep;
443 poll->atr_res_len = min_t(__u8, *data++,
444 NFC_ATR_RES_MAXSIZE - 2);
445 pr_debug("atr_res_len %d\n", poll->atr_res_len);
446 if (poll->atr_res_len > 0)
447 memcpy(poll->atr_res, data, poll->atr_res_len);
448 break;
449
450 case NCI_NFC_A_PASSIVE_LISTEN_MODE:
451 case NCI_NFC_F_PASSIVE_LISTEN_MODE:
452 listen = &ntf->activation_params.listen_nfc_dep;
453 listen->atr_req_len = min_t(__u8, *data++,
454 NFC_ATR_REQ_MAXSIZE - 2);
455 pr_debug("atr_req_len %d\n", listen->atr_req_len);
456 if (listen->atr_req_len > 0)
457 memcpy(listen->atr_req, data, listen->atr_req_len);
458 break;
459
460 default:
461 pr_err("unsupported activation_rf_tech_and_mode 0x%x\n",
462 ntf->activation_rf_tech_and_mode);
463 return NCI_STATUS_RF_PROTOCOL_ERROR;
464 }
465
466 return NCI_STATUS_OK;
467 }
468
469 static void nci_target_auto_activated(struct nci_dev *ndev,
470 const struct nci_rf_intf_activated_ntf *ntf)
471 {
472 struct nfc_target *target;
473 int rc;
474
475 target = &ndev->targets[ndev->n_targets];
476
477 rc = nci_add_new_protocol(ndev, target, ntf->rf_protocol,
478 ntf->activation_rf_tech_and_mode,
479 &ntf->rf_tech_specific_params);
480 if (rc)
481 return;
482
483 target->logical_idx = ntf->rf_discovery_id;
484 ndev->n_targets++;
485
486 pr_debug("logical idx %d, n_targets %d\n",
487 target->logical_idx, ndev->n_targets);
488
489 nfc_targets_found(ndev->nfc_dev, ndev->targets, ndev->n_targets);
490 }
491
492 static int nci_store_general_bytes_nfc_dep(struct nci_dev *ndev,
493 const struct nci_rf_intf_activated_ntf *ntf)
494 {
495 ndev->remote_gb_len = 0;
496
497 if (ntf->activation_params_len <= 0)
498 return NCI_STATUS_OK;
499
500 switch (ntf->activation_rf_tech_and_mode) {
501 case NCI_NFC_A_PASSIVE_POLL_MODE:
502 case NCI_NFC_F_PASSIVE_POLL_MODE:
503 ndev->remote_gb_len = min_t(__u8,
504 (ntf->activation_params.poll_nfc_dep.atr_res_len
505 - NFC_ATR_RES_GT_OFFSET),
506 NFC_ATR_RES_GB_MAXSIZE);
507 memcpy(ndev->remote_gb,
508 (ntf->activation_params.poll_nfc_dep.atr_res
509 + NFC_ATR_RES_GT_OFFSET),
510 ndev->remote_gb_len);
511 break;
512
513 case NCI_NFC_A_PASSIVE_LISTEN_MODE:
514 case NCI_NFC_F_PASSIVE_LISTEN_MODE:
515 ndev->remote_gb_len = min_t(__u8,
516 (ntf->activation_params.listen_nfc_dep.atr_req_len
517 - NFC_ATR_REQ_GT_OFFSET),
518 NFC_ATR_REQ_GB_MAXSIZE);
519 memcpy(ndev->remote_gb,
520 (ntf->activation_params.listen_nfc_dep.atr_req
521 + NFC_ATR_REQ_GT_OFFSET),
522 ndev->remote_gb_len);
523 break;
524
525 default:
526 pr_err("unsupported activation_rf_tech_and_mode 0x%x\n",
527 ntf->activation_rf_tech_and_mode);
528 return NCI_STATUS_RF_PROTOCOL_ERROR;
529 }
530
531 return NCI_STATUS_OK;
532 }
533
534 static void nci_rf_intf_activated_ntf_packet(struct nci_dev *ndev,
535 const struct sk_buff *skb)
536 {
537 struct nci_conn_info *conn_info;
538 struct nci_rf_intf_activated_ntf ntf;
539 const __u8 *data = skb->data;
540 int err = NCI_STATUS_OK;
541
542 ntf.rf_discovery_id = *data++;
543 ntf.rf_interface = *data++;
544 ntf.rf_protocol = *data++;
545 ntf.activation_rf_tech_and_mode = *data++;
546 ntf.max_data_pkt_payload_size = *data++;
547 ntf.initial_num_credits = *data++;
548 ntf.rf_tech_specific_params_len = *data++;
549
550 pr_debug("rf_discovery_id %d\n", ntf.rf_discovery_id);
551 pr_debug("rf_interface 0x%x\n", ntf.rf_interface);
552 pr_debug("rf_protocol 0x%x\n", ntf.rf_protocol);
553 pr_debug("activation_rf_tech_and_mode 0x%x\n",
554 ntf.activation_rf_tech_and_mode);
555 pr_debug("max_data_pkt_payload_size 0x%x\n",
556 ntf.max_data_pkt_payload_size);
557 pr_debug("initial_num_credits 0x%x\n",
558 ntf.initial_num_credits);
559 pr_debug("rf_tech_specific_params_len %d\n",
560 ntf.rf_tech_specific_params_len);
561
562 /* If this contains a value of 0x00 (NFCEE Direct RF
563 * Interface) then all following parameters SHALL contain a
564 * value of 0 and SHALL be ignored.
565 */
566 if (ntf.rf_interface == NCI_RF_INTERFACE_NFCEE_DIRECT)
567 goto listen;
568
569 if (ntf.rf_tech_specific_params_len > 0) {
570 switch (ntf.activation_rf_tech_and_mode) {
571 case NCI_NFC_A_PASSIVE_POLL_MODE:
572 data = nci_extract_rf_params_nfca_passive_poll(ndev,
573 &(ntf.rf_tech_specific_params.nfca_poll), data);
574 break;
575
576 case NCI_NFC_B_PASSIVE_POLL_MODE:
577 data = nci_extract_rf_params_nfcb_passive_poll(ndev,
578 &(ntf.rf_tech_specific_params.nfcb_poll), data);
579 break;
580
581 case NCI_NFC_F_PASSIVE_POLL_MODE:
582 data = nci_extract_rf_params_nfcf_passive_poll(ndev,
583 &(ntf.rf_tech_specific_params.nfcf_poll), data);
584 break;
585
586 case NCI_NFC_V_PASSIVE_POLL_MODE:
587 data = nci_extract_rf_params_nfcv_passive_poll(ndev,
588 &(ntf.rf_tech_specific_params.nfcv_poll), data);
589 break;
590
591 case NCI_NFC_A_PASSIVE_LISTEN_MODE:
592 /* no RF technology specific parameters */
593 break;
594
595 case NCI_NFC_F_PASSIVE_LISTEN_MODE:
596 data = nci_extract_rf_params_nfcf_passive_listen(ndev,
597 &(ntf.rf_tech_specific_params.nfcf_listen),
598 data);
599 break;
600
601 default:
602 pr_err("unsupported activation_rf_tech_and_mode 0x%x\n",
603 ntf.activation_rf_tech_and_mode);
604 err = NCI_STATUS_RF_PROTOCOL_ERROR;
605 goto exit;
606 }
607 }
608
609 ntf.data_exch_rf_tech_and_mode = *data++;
610 ntf.data_exch_tx_bit_rate = *data++;
611 ntf.data_exch_rx_bit_rate = *data++;
612 ntf.activation_params_len = *data++;
613
614 pr_debug("data_exch_rf_tech_and_mode 0x%x\n",
615 ntf.data_exch_rf_tech_and_mode);
616 pr_debug("data_exch_tx_bit_rate 0x%x\n", ntf.data_exch_tx_bit_rate);
617 pr_debug("data_exch_rx_bit_rate 0x%x\n", ntf.data_exch_rx_bit_rate);
618 pr_debug("activation_params_len %d\n", ntf.activation_params_len);
619
620 if (ntf.activation_params_len > 0) {
621 switch (ntf.rf_interface) {
622 case NCI_RF_INTERFACE_ISO_DEP:
623 err = nci_extract_activation_params_iso_dep(ndev,
624 &ntf, data);
625 break;
626
627 case NCI_RF_INTERFACE_NFC_DEP:
628 err = nci_extract_activation_params_nfc_dep(ndev,
629 &ntf, data);
630 break;
631
632 case NCI_RF_INTERFACE_FRAME:
633 /* no activation params */
634 break;
635
636 default:
637 pr_err("unsupported rf_interface 0x%x\n",
638 ntf.rf_interface);
639 err = NCI_STATUS_RF_PROTOCOL_ERROR;
640 break;
641 }
642 }
643
644 exit:
645 if (err == NCI_STATUS_OK) {
646 conn_info = ndev->rf_conn_info;
647 if (!conn_info)
648 return;
649
650 conn_info->max_pkt_payload_len = ntf.max_data_pkt_payload_size;
651 conn_info->initial_num_credits = ntf.initial_num_credits;
652
653 /* set the available credits to initial value */
654 atomic_set(&conn_info->credits_cnt,
655 conn_info->initial_num_credits);
656
657 /* store general bytes to be reported later in dep_link_up */
658 if (ntf.rf_interface == NCI_RF_INTERFACE_NFC_DEP) {
659 err = nci_store_general_bytes_nfc_dep(ndev, &ntf);
660 if (err != NCI_STATUS_OK)
661 pr_err("unable to store general bytes\n");
662 }
663 }
664
665 if (!(ntf.activation_rf_tech_and_mode & NCI_RF_TECH_MODE_LISTEN_MASK)) {
666 /* Poll mode */
667 if (atomic_read(&ndev->state) == NCI_DISCOVERY) {
668 /* A single target was found and activated
669 * automatically */
670 atomic_set(&ndev->state, NCI_POLL_ACTIVE);
671 if (err == NCI_STATUS_OK)
672 nci_target_auto_activated(ndev, &ntf);
673 } else { /* ndev->state == NCI_W4_HOST_SELECT */
674 /* A selected target was activated, so complete the
675 * request */
676 atomic_set(&ndev->state, NCI_POLL_ACTIVE);
677 nci_req_complete(ndev, err);
678 }
679 } else {
680 listen:
681 /* Listen mode */
682 atomic_set(&ndev->state, NCI_LISTEN_ACTIVE);
683 if (err == NCI_STATUS_OK &&
684 ntf.rf_protocol == NCI_RF_PROTOCOL_NFC_DEP) {
685 err = nfc_tm_activated(ndev->nfc_dev,
686 NFC_PROTO_NFC_DEP_MASK,
687 NFC_COMM_PASSIVE,
688 ndev->remote_gb,
689 ndev->remote_gb_len);
690 if (err != NCI_STATUS_OK)
691 pr_err("error when signaling tm activation\n");
692 }
693 }
694 }
695
696 static void nci_rf_deactivate_ntf_packet(struct nci_dev *ndev,
697 const struct sk_buff *skb)
698 {
699 const struct nci_conn_info *conn_info;
700 const struct nci_rf_deactivate_ntf *ntf = (void *)skb->data;
701
702 pr_debug("entry, type 0x%x, reason 0x%x\n", ntf->type, ntf->reason);
703
704 conn_info = ndev->rf_conn_info;
705 if (!conn_info)
706 return;
707
708 /* drop tx data queue */
709 skb_queue_purge(&ndev->tx_q);
710
711 /* drop partial rx data packet */
712 if (ndev->rx_data_reassembly) {
713 kfree_skb(ndev->rx_data_reassembly);
714 ndev->rx_data_reassembly = NULL;
715 }
716
717 /* complete the data exchange transaction, if exists */
718 if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags))
719 nci_data_exchange_complete(ndev, NULL, NCI_STATIC_RF_CONN_ID,
720 -EIO);
721
722 switch (ntf->type) {
723 case NCI_DEACTIVATE_TYPE_IDLE_MODE:
724 nci_clear_target_list(ndev);
725 atomic_set(&ndev->state, NCI_IDLE);
726 break;
727 case NCI_DEACTIVATE_TYPE_SLEEP_MODE:
728 case NCI_DEACTIVATE_TYPE_SLEEP_AF_MODE:
729 atomic_set(&ndev->state, NCI_W4_HOST_SELECT);
730 break;
731 case NCI_DEACTIVATE_TYPE_DISCOVERY:
732 nci_clear_target_list(ndev);
733 atomic_set(&ndev->state, NCI_DISCOVERY);
734 break;
735 }
736
737 nci_req_complete(ndev, NCI_STATUS_OK);
738 }
739
740 static void nci_nfcee_discover_ntf_packet(struct nci_dev *ndev,
741 const struct sk_buff *skb)
742 {
743 u8 status = NCI_STATUS_OK;
744 const struct nci_nfcee_discover_ntf *nfcee_ntf =
745 (struct nci_nfcee_discover_ntf *)skb->data;
746
747 /* NFCForum NCI 9.2.1 HCI Network Specific Handling
748 * If the NFCC supports the HCI Network, it SHALL return one,
749 * and only one, NFCEE_DISCOVER_NTF with a Protocol type of
750 * “HCI Access”, even if the HCI Network contains multiple NFCEEs.
751 */
752 ndev->hci_dev->nfcee_id = nfcee_ntf->nfcee_id;
753 ndev->cur_params.id = nfcee_ntf->nfcee_id;
754
755 nci_req_complete(ndev, status);
756 }
757
758 void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb)
759 {
760 __u16 ntf_opcode = nci_opcode(skb->data);
761
762 pr_debug("NCI RX: MT=ntf, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n",
763 nci_pbf(skb->data),
764 nci_opcode_gid(ntf_opcode),
765 nci_opcode_oid(ntf_opcode),
766 nci_plen(skb->data));
767
768 /* strip the nci control header */
769 skb_pull(skb, NCI_CTRL_HDR_SIZE);
770
771 if (nci_opcode_gid(ntf_opcode) == NCI_GID_PROPRIETARY) {
772 if (nci_prop_ntf_packet(ndev, ntf_opcode, skb) == -ENOTSUPP) {
773 pr_err("unsupported ntf opcode 0x%x\n",
774 ntf_opcode);
775 }
776
777 goto end;
778 }
779
780 switch (ntf_opcode) {
781 case NCI_OP_CORE_RESET_NTF:
782 nci_core_reset_ntf_packet(ndev, skb);
783 break;
784
785 case NCI_OP_CORE_CONN_CREDITS_NTF:
786 nci_core_conn_credits_ntf_packet(ndev, skb);
787 break;
788
789 case NCI_OP_CORE_GENERIC_ERROR_NTF:
790 nci_core_generic_error_ntf_packet(ndev, skb);
791 break;
792
793 case NCI_OP_CORE_INTF_ERROR_NTF:
794 nci_core_conn_intf_error_ntf_packet(ndev, skb);
795 break;
796
797 case NCI_OP_RF_DISCOVER_NTF:
798 nci_rf_discover_ntf_packet(ndev, skb);
799 break;
800
801 case NCI_OP_RF_INTF_ACTIVATED_NTF:
802 nci_rf_intf_activated_ntf_packet(ndev, skb);
803 break;
804
805 case NCI_OP_RF_DEACTIVATE_NTF:
806 nci_rf_deactivate_ntf_packet(ndev, skb);
807 break;
808
809 case NCI_OP_NFCEE_DISCOVER_NTF:
810 nci_nfcee_discover_ntf_packet(ndev, skb);
811 break;
812
813 case NCI_OP_RF_NFCEE_ACTION_NTF:
814 break;
815
816 default:
817 pr_err("unknown ntf opcode 0x%x\n", ntf_opcode);
818 break;
819 }
820
821 nci_core_ntf_packet(ndev, ntf_opcode, skb);
822 end:
823 kfree_skb(skb);
824 }
825
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