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16#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
17
18#include <linux/module.h>
19#include <linux/kernel.h>
20#include <linux/types.h>
21#include <linux/workqueue.h>
22#include <linux/completion.h>
23#include <linux/export.h>
24#include <linux/sched.h>
25#include <linux/bitops.h>
26#include <linux/skbuff.h>
27
28#include "../nfc.h"
29#include <net/nfc/nci.h>
30#include <net/nfc/nci_core.h>
31#include <linux/nfc.h>
32
33struct core_conn_create_data {
34 int length;
35 struct nci_core_conn_create_cmd *cmd;
36};
37
38static void nci_cmd_work(struct work_struct *work);
39static void nci_rx_work(struct work_struct *work);
40static void nci_tx_work(struct work_struct *work);
41
42struct nci_conn_info *nci_get_conn_info_by_conn_id(struct nci_dev *ndev,
43 int conn_id)
44{
45 struct nci_conn_info *conn_info;
46
47 list_for_each_entry(conn_info, &ndev->conn_info_list, list) {
48 if (conn_info->conn_id == conn_id)
49 return conn_info;
50 }
51
52 return NULL;
53}
54
55int nci_get_conn_info_by_dest_type_params(struct nci_dev *ndev, u8 dest_type,
56 const struct dest_spec_params *params)
57{
58 const struct nci_conn_info *conn_info;
59
60 list_for_each_entry(conn_info, &ndev->conn_info_list, list) {
61 if (conn_info->dest_type == dest_type) {
62 if (!params)
63 return conn_info->conn_id;
64
65 if (params->id == conn_info->dest_params->id &&
66 params->protocol == conn_info->dest_params->protocol)
67 return conn_info->conn_id;
68 }
69 }
70
71 return -EINVAL;
72}
73EXPORT_SYMBOL(nci_get_conn_info_by_dest_type_params);
74
75
76
77void nci_req_complete(struct nci_dev *ndev, int result)
78{
79 if (ndev->req_status == NCI_REQ_PEND) {
80 ndev->req_result = result;
81 ndev->req_status = NCI_REQ_DONE;
82 complete(&ndev->req_completion);
83 }
84}
85EXPORT_SYMBOL(nci_req_complete);
86
87static void nci_req_cancel(struct nci_dev *ndev, int err)
88{
89 if (ndev->req_status == NCI_REQ_PEND) {
90 ndev->req_result = err;
91 ndev->req_status = NCI_REQ_CANCELED;
92 complete(&ndev->req_completion);
93 }
94}
95
96
97static int __nci_request(struct nci_dev *ndev,
98 void (*req)(struct nci_dev *ndev, const void *opt),
99 const void *opt, __u32 timeout)
100{
101 int rc = 0;
102 long completion_rc;
103
104 ndev->req_status = NCI_REQ_PEND;
105
106 reinit_completion(&ndev->req_completion);
107 req(ndev, opt);
108 completion_rc =
109 wait_for_completion_interruptible_timeout(&ndev->req_completion,
110 timeout);
111
112 pr_debug("wait_for_completion return %ld\n", completion_rc);
113
114 if (completion_rc > 0) {
115 switch (ndev->req_status) {
116 case NCI_REQ_DONE:
117 rc = nci_to_errno(ndev->req_result);
118 break;
119
120 case NCI_REQ_CANCELED:
121 rc = -ndev->req_result;
122 break;
123
124 default:
125 rc = -ETIMEDOUT;
126 break;
127 }
128 } else {
129 pr_err("wait_for_completion_interruptible_timeout failed %ld\n",
130 completion_rc);
131
132 rc = ((completion_rc == 0) ? (-ETIMEDOUT) : (completion_rc));
133 }
134
135 ndev->req_status = ndev->req_result = 0;
136
137 return rc;
138}
139
140inline int nci_request(struct nci_dev *ndev,
141 void (*req)(struct nci_dev *ndev,
142 const void *opt),
143 const void *opt, __u32 timeout)
144{
145 int rc;
146
147 if (!test_bit(NCI_UP, &ndev->flags))
148 return -ENETDOWN;
149
150
151 mutex_lock(&ndev->req_lock);
152 rc = __nci_request(ndev, req, opt, timeout);
153 mutex_unlock(&ndev->req_lock);
154
155 return rc;
156}
157
158static void nci_reset_req(struct nci_dev *ndev, const void *opt)
159{
160 struct nci_core_reset_cmd cmd;
161
162 cmd.reset_type = NCI_RESET_TYPE_RESET_CONFIG;
163 nci_send_cmd(ndev, NCI_OP_CORE_RESET_CMD, 1, &cmd);
164}
165
166static void nci_init_req(struct nci_dev *ndev, const void *opt)
167{
168 u8 plen = 0;
169
170 if (opt)
171 plen = sizeof(struct nci_core_init_v2_cmd);
172
173 nci_send_cmd(ndev, NCI_OP_CORE_INIT_CMD, plen, opt);
174}
175
176static void nci_init_complete_req(struct nci_dev *ndev, const void *opt)
177{
178 struct nci_rf_disc_map_cmd cmd;
179 struct disc_map_config *cfg = cmd.mapping_configs;
180 __u8 *num = &cmd.num_mapping_configs;
181 int i;
182
183
184 *num = 0;
185
186
187 for (i = 0; i < ndev->num_supported_rf_interfaces; i++) {
188 if (ndev->supported_rf_interfaces[i] ==
189 NCI_RF_INTERFACE_ISO_DEP) {
190 cfg[*num].rf_protocol = NCI_RF_PROTOCOL_ISO_DEP;
191 cfg[*num].mode = NCI_DISC_MAP_MODE_POLL |
192 NCI_DISC_MAP_MODE_LISTEN;
193 cfg[*num].rf_interface = NCI_RF_INTERFACE_ISO_DEP;
194 (*num)++;
195 } else if (ndev->supported_rf_interfaces[i] ==
196 NCI_RF_INTERFACE_NFC_DEP) {
197 cfg[*num].rf_protocol = NCI_RF_PROTOCOL_NFC_DEP;
198 cfg[*num].mode = NCI_DISC_MAP_MODE_POLL |
199 NCI_DISC_MAP_MODE_LISTEN;
200 cfg[*num].rf_interface = NCI_RF_INTERFACE_NFC_DEP;
201 (*num)++;
202 }
203
204 if (*num == NCI_MAX_NUM_MAPPING_CONFIGS)
205 break;
206 }
207
208 nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_MAP_CMD,
209 (1 + ((*num) * sizeof(struct disc_map_config))), &cmd);
210}
211
212struct nci_set_config_param {
213 __u8 id;
214 size_t len;
215 const __u8 *val;
216};
217
218static void nci_set_config_req(struct nci_dev *ndev, const void *opt)
219{
220 const struct nci_set_config_param *param = opt;
221 struct nci_core_set_config_cmd cmd;
222
223 BUG_ON(param->len > NCI_MAX_PARAM_LEN);
224
225 cmd.num_params = 1;
226 cmd.param.id = param->id;
227 cmd.param.len = param->len;
228 memcpy(cmd.param.val, param->val, param->len);
229
230 nci_send_cmd(ndev, NCI_OP_CORE_SET_CONFIG_CMD, (3 + param->len), &cmd);
231}
232
233struct nci_rf_discover_param {
234 __u32 im_protocols;
235 __u32 tm_protocols;
236};
237
238static void nci_rf_discover_req(struct nci_dev *ndev, const void *opt)
239{
240 const struct nci_rf_discover_param *param = opt;
241 struct nci_rf_disc_cmd cmd;
242
243 cmd.num_disc_configs = 0;
244
245 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
246 (param->im_protocols & NFC_PROTO_JEWEL_MASK ||
247 param->im_protocols & NFC_PROTO_MIFARE_MASK ||
248 param->im_protocols & NFC_PROTO_ISO14443_MASK ||
249 param->im_protocols & NFC_PROTO_NFC_DEP_MASK)) {
250 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
251 NCI_NFC_A_PASSIVE_POLL_MODE;
252 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
253 cmd.num_disc_configs++;
254 }
255
256 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
257 (param->im_protocols & NFC_PROTO_ISO14443_B_MASK)) {
258 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
259 NCI_NFC_B_PASSIVE_POLL_MODE;
260 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
261 cmd.num_disc_configs++;
262 }
263
264 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
265 (param->im_protocols & NFC_PROTO_FELICA_MASK ||
266 param->im_protocols & NFC_PROTO_NFC_DEP_MASK)) {
267 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
268 NCI_NFC_F_PASSIVE_POLL_MODE;
269 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
270 cmd.num_disc_configs++;
271 }
272
273 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
274 (param->im_protocols & NFC_PROTO_ISO15693_MASK)) {
275 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
276 NCI_NFC_V_PASSIVE_POLL_MODE;
277 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
278 cmd.num_disc_configs++;
279 }
280
281 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS - 1) &&
282 (param->tm_protocols & NFC_PROTO_NFC_DEP_MASK)) {
283 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
284 NCI_NFC_A_PASSIVE_LISTEN_MODE;
285 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
286 cmd.num_disc_configs++;
287 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
288 NCI_NFC_F_PASSIVE_LISTEN_MODE;
289 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
290 cmd.num_disc_configs++;
291 }
292
293 nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_CMD,
294 (1 + (cmd.num_disc_configs * sizeof(struct disc_config))),
295 &cmd);
296}
297
298struct nci_rf_discover_select_param {
299 __u8 rf_discovery_id;
300 __u8 rf_protocol;
301};
302
303static void nci_rf_discover_select_req(struct nci_dev *ndev, const void *opt)
304{
305 const struct nci_rf_discover_select_param *param = opt;
306 struct nci_rf_discover_select_cmd cmd;
307
308 cmd.rf_discovery_id = param->rf_discovery_id;
309 cmd.rf_protocol = param->rf_protocol;
310
311 switch (cmd.rf_protocol) {
312 case NCI_RF_PROTOCOL_ISO_DEP:
313 cmd.rf_interface = NCI_RF_INTERFACE_ISO_DEP;
314 break;
315
316 case NCI_RF_PROTOCOL_NFC_DEP:
317 cmd.rf_interface = NCI_RF_INTERFACE_NFC_DEP;
318 break;
319
320 default:
321 cmd.rf_interface = NCI_RF_INTERFACE_FRAME;
322 break;
323 }
324
325 nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_SELECT_CMD,
326 sizeof(struct nci_rf_discover_select_cmd), &cmd);
327}
328
329static void nci_rf_deactivate_req(struct nci_dev *ndev, const void *opt)
330{
331 struct nci_rf_deactivate_cmd cmd;
332
333 cmd.type = (unsigned long)opt;
334
335 nci_send_cmd(ndev, NCI_OP_RF_DEACTIVATE_CMD,
336 sizeof(struct nci_rf_deactivate_cmd), &cmd);
337}
338
339struct nci_cmd_param {
340 __u16 opcode;
341 size_t len;
342 const __u8 *payload;
343};
344
345static void nci_generic_req(struct nci_dev *ndev, const void *opt)
346{
347 const struct nci_cmd_param *param = opt;
348
349 nci_send_cmd(ndev, param->opcode, param->len, param->payload);
350}
351
352int nci_prop_cmd(struct nci_dev *ndev, __u8 oid, size_t len, const __u8 *payload)
353{
354 struct nci_cmd_param param;
355
356 param.opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, oid);
357 param.len = len;
358 param.payload = payload;
359
360 return __nci_request(ndev, nci_generic_req, ¶m,
361 msecs_to_jiffies(NCI_CMD_TIMEOUT));
362}
363EXPORT_SYMBOL(nci_prop_cmd);
364
365int nci_core_cmd(struct nci_dev *ndev, __u16 opcode, size_t len,
366 const __u8 *payload)
367{
368 struct nci_cmd_param param;
369
370 param.opcode = opcode;
371 param.len = len;
372 param.payload = payload;
373
374 return __nci_request(ndev, nci_generic_req, ¶m,
375 msecs_to_jiffies(NCI_CMD_TIMEOUT));
376}
377EXPORT_SYMBOL(nci_core_cmd);
378
379int nci_core_reset(struct nci_dev *ndev)
380{
381 return __nci_request(ndev, nci_reset_req, (void *)0,
382 msecs_to_jiffies(NCI_RESET_TIMEOUT));
383}
384EXPORT_SYMBOL(nci_core_reset);
385
386int nci_core_init(struct nci_dev *ndev)
387{
388 return __nci_request(ndev, nci_init_req, (void *)0,
389 msecs_to_jiffies(NCI_INIT_TIMEOUT));
390}
391EXPORT_SYMBOL(nci_core_init);
392
393struct nci_loopback_data {
394 u8 conn_id;
395 struct sk_buff *data;
396};
397
398static void nci_send_data_req(struct nci_dev *ndev, const void *opt)
399{
400 const struct nci_loopback_data *data = opt;
401
402 nci_send_data(ndev, data->conn_id, data->data);
403}
404
405static void nci_nfcc_loopback_cb(void *context, struct sk_buff *skb, int err)
406{
407 struct nci_dev *ndev = (struct nci_dev *)context;
408 struct nci_conn_info *conn_info;
409
410 conn_info = nci_get_conn_info_by_conn_id(ndev, ndev->cur_conn_id);
411 if (!conn_info) {
412 nci_req_complete(ndev, NCI_STATUS_REJECTED);
413 return;
414 }
415
416 conn_info->rx_skb = skb;
417
418 nci_req_complete(ndev, NCI_STATUS_OK);
419}
420
421int nci_nfcc_loopback(struct nci_dev *ndev, const void *data, size_t data_len,
422 struct sk_buff **resp)
423{
424 int r;
425 struct nci_loopback_data loopback_data;
426 struct nci_conn_info *conn_info;
427 struct sk_buff *skb;
428 int conn_id = nci_get_conn_info_by_dest_type_params(ndev,
429 NCI_DESTINATION_NFCC_LOOPBACK, NULL);
430
431 if (conn_id < 0) {
432 r = nci_core_conn_create(ndev, NCI_DESTINATION_NFCC_LOOPBACK,
433 0, 0, NULL);
434 if (r != NCI_STATUS_OK)
435 return r;
436
437 conn_id = nci_get_conn_info_by_dest_type_params(ndev,
438 NCI_DESTINATION_NFCC_LOOPBACK,
439 NULL);
440 }
441
442 conn_info = nci_get_conn_info_by_conn_id(ndev, conn_id);
443 if (!conn_info)
444 return -EPROTO;
445
446
447 conn_info->data_exchange_cb = nci_nfcc_loopback_cb;
448 conn_info->data_exchange_cb_context = ndev;
449
450 skb = nci_skb_alloc(ndev, NCI_DATA_HDR_SIZE + data_len, GFP_KERNEL);
451 if (!skb)
452 return -ENOMEM;
453
454 skb_reserve(skb, NCI_DATA_HDR_SIZE);
455 skb_put_data(skb, data, data_len);
456
457 loopback_data.conn_id = conn_id;
458 loopback_data.data = skb;
459
460 ndev->cur_conn_id = conn_id;
461 r = nci_request(ndev, nci_send_data_req, &loopback_data,
462 msecs_to_jiffies(NCI_DATA_TIMEOUT));
463 if (r == NCI_STATUS_OK && resp)
464 *resp = conn_info->rx_skb;
465
466 return r;
467}
468EXPORT_SYMBOL(nci_nfcc_loopback);
469
470static int nci_open_device(struct nci_dev *ndev)
471{
472 int rc = 0;
473
474 mutex_lock(&ndev->req_lock);
475
476 if (test_bit(NCI_UP, &ndev->flags)) {
477 rc = -EALREADY;
478 goto done;
479 }
480
481 if (ndev->ops->open(ndev)) {
482 rc = -EIO;
483 goto done;
484 }
485
486 atomic_set(&ndev->cmd_cnt, 1);
487
488 set_bit(NCI_INIT, &ndev->flags);
489
490 if (ndev->ops->init)
491 rc = ndev->ops->init(ndev);
492
493 if (!rc) {
494 rc = __nci_request(ndev, nci_reset_req, (void *)0,
495 msecs_to_jiffies(NCI_RESET_TIMEOUT));
496 }
497
498 if (!rc && ndev->ops->setup) {
499 rc = ndev->ops->setup(ndev);
500 }
501
502 if (!rc) {
503 struct nci_core_init_v2_cmd nci_init_v2_cmd = {
504 .feature1 = NCI_FEATURE_DISABLE,
505 .feature2 = NCI_FEATURE_DISABLE
506 };
507 const void *opt = NULL;
508
509 if (ndev->nci_ver & NCI_VER_2_MASK)
510 opt = &nci_init_v2_cmd;
511
512 rc = __nci_request(ndev, nci_init_req, opt,
513 msecs_to_jiffies(NCI_INIT_TIMEOUT));
514 }
515
516 if (!rc && ndev->ops->post_setup)
517 rc = ndev->ops->post_setup(ndev);
518
519 if (!rc) {
520 rc = __nci_request(ndev, nci_init_complete_req, (void *)0,
521 msecs_to_jiffies(NCI_INIT_TIMEOUT));
522 }
523
524 clear_bit(NCI_INIT, &ndev->flags);
525
526 if (!rc) {
527 set_bit(NCI_UP, &ndev->flags);
528 nci_clear_target_list(ndev);
529 atomic_set(&ndev->state, NCI_IDLE);
530 } else {
531
532 skb_queue_purge(&ndev->cmd_q);
533 skb_queue_purge(&ndev->rx_q);
534 skb_queue_purge(&ndev->tx_q);
535
536 ndev->ops->close(ndev);
537 ndev->flags = 0;
538 }
539
540done:
541 mutex_unlock(&ndev->req_lock);
542 return rc;
543}
544
545static int nci_close_device(struct nci_dev *ndev)
546{
547 nci_req_cancel(ndev, ENODEV);
548 mutex_lock(&ndev->req_lock);
549
550 if (!test_and_clear_bit(NCI_UP, &ndev->flags)) {
551 del_timer_sync(&ndev->cmd_timer);
552 del_timer_sync(&ndev->data_timer);
553 mutex_unlock(&ndev->req_lock);
554 return 0;
555 }
556
557
558 skb_queue_purge(&ndev->rx_q);
559 skb_queue_purge(&ndev->tx_q);
560
561
562 flush_workqueue(ndev->rx_wq);
563 flush_workqueue(ndev->tx_wq);
564
565
566 skb_queue_purge(&ndev->cmd_q);
567 atomic_set(&ndev->cmd_cnt, 1);
568
569 set_bit(NCI_INIT, &ndev->flags);
570 __nci_request(ndev, nci_reset_req, (void *)0,
571 msecs_to_jiffies(NCI_RESET_TIMEOUT));
572
573
574
575
576 ndev->ops->close(ndev);
577
578 clear_bit(NCI_INIT, &ndev->flags);
579
580
581 flush_workqueue(ndev->cmd_wq);
582
583 del_timer_sync(&ndev->cmd_timer);
584
585
586 ndev->flags = 0;
587
588 mutex_unlock(&ndev->req_lock);
589
590 return 0;
591}
592
593
594static void nci_cmd_timer(struct timer_list *t)
595{
596 struct nci_dev *ndev = from_timer(ndev, t, cmd_timer);
597
598 atomic_set(&ndev->cmd_cnt, 1);
599 queue_work(ndev->cmd_wq, &ndev->cmd_work);
600}
601
602
603static void nci_data_timer(struct timer_list *t)
604{
605 struct nci_dev *ndev = from_timer(ndev, t, data_timer);
606
607 set_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags);
608 queue_work(ndev->rx_wq, &ndev->rx_work);
609}
610
611static int nci_dev_up(struct nfc_dev *nfc_dev)
612{
613 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
614
615 return nci_open_device(ndev);
616}
617
618static int nci_dev_down(struct nfc_dev *nfc_dev)
619{
620 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
621
622 return nci_close_device(ndev);
623}
624
625int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, const __u8 *val)
626{
627 struct nci_set_config_param param;
628
629 if (!val || !len)
630 return 0;
631
632 param.id = id;
633 param.len = len;
634 param.val = val;
635
636 return __nci_request(ndev, nci_set_config_req, ¶m,
637 msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
638}
639EXPORT_SYMBOL(nci_set_config);
640
641static void nci_nfcee_discover_req(struct nci_dev *ndev, const void *opt)
642{
643 struct nci_nfcee_discover_cmd cmd;
644 __u8 action = (unsigned long)opt;
645
646 cmd.discovery_action = action;
647
648 nci_send_cmd(ndev, NCI_OP_NFCEE_DISCOVER_CMD, 1, &cmd);
649}
650
651int nci_nfcee_discover(struct nci_dev *ndev, u8 action)
652{
653 unsigned long opt = action;
654
655 return __nci_request(ndev, nci_nfcee_discover_req, (void *)opt,
656 msecs_to_jiffies(NCI_CMD_TIMEOUT));
657}
658EXPORT_SYMBOL(nci_nfcee_discover);
659
660static void nci_nfcee_mode_set_req(struct nci_dev *ndev, const void *opt)
661{
662 const struct nci_nfcee_mode_set_cmd *cmd = opt;
663
664 nci_send_cmd(ndev, NCI_OP_NFCEE_MODE_SET_CMD,
665 sizeof(struct nci_nfcee_mode_set_cmd), cmd);
666}
667
668int nci_nfcee_mode_set(struct nci_dev *ndev, u8 nfcee_id, u8 nfcee_mode)
669{
670 struct nci_nfcee_mode_set_cmd cmd;
671
672 cmd.nfcee_id = nfcee_id;
673 cmd.nfcee_mode = nfcee_mode;
674
675 return __nci_request(ndev, nci_nfcee_mode_set_req, &cmd,
676 msecs_to_jiffies(NCI_CMD_TIMEOUT));
677}
678EXPORT_SYMBOL(nci_nfcee_mode_set);
679
680static void nci_core_conn_create_req(struct nci_dev *ndev, const void *opt)
681{
682 const struct core_conn_create_data *data = opt;
683
684 nci_send_cmd(ndev, NCI_OP_CORE_CONN_CREATE_CMD, data->length, data->cmd);
685}
686
687int nci_core_conn_create(struct nci_dev *ndev, u8 destination_type,
688 u8 number_destination_params,
689 size_t params_len,
690 const struct core_conn_create_dest_spec_params *params)
691{
692 int r;
693 struct nci_core_conn_create_cmd *cmd;
694 struct core_conn_create_data data;
695
696 data.length = params_len + sizeof(struct nci_core_conn_create_cmd);
697 cmd = kzalloc(data.length, GFP_KERNEL);
698 if (!cmd)
699 return -ENOMEM;
700
701 cmd->destination_type = destination_type;
702 cmd->number_destination_params = number_destination_params;
703
704 data.cmd = cmd;
705
706 if (params) {
707 memcpy(cmd->params, params, params_len);
708 if (params->length > 0)
709 memcpy(&ndev->cur_params,
710 ¶ms->value[DEST_SPEC_PARAMS_ID_INDEX],
711 sizeof(struct dest_spec_params));
712 else
713 ndev->cur_params.id = 0;
714 } else {
715 ndev->cur_params.id = 0;
716 }
717 ndev->cur_dest_type = destination_type;
718
719 r = __nci_request(ndev, nci_core_conn_create_req, &data,
720 msecs_to_jiffies(NCI_CMD_TIMEOUT));
721 kfree(cmd);
722 return r;
723}
724EXPORT_SYMBOL(nci_core_conn_create);
725
726static void nci_core_conn_close_req(struct nci_dev *ndev, const void *opt)
727{
728 __u8 conn_id = (unsigned long)opt;
729
730 nci_send_cmd(ndev, NCI_OP_CORE_CONN_CLOSE_CMD, 1, &conn_id);
731}
732
733int nci_core_conn_close(struct nci_dev *ndev, u8 conn_id)
734{
735 unsigned long opt = conn_id;
736
737 ndev->cur_conn_id = conn_id;
738 return __nci_request(ndev, nci_core_conn_close_req, (void *)opt,
739 msecs_to_jiffies(NCI_CMD_TIMEOUT));
740}
741EXPORT_SYMBOL(nci_core_conn_close);
742
743static int nci_set_local_general_bytes(struct nfc_dev *nfc_dev)
744{
745 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
746 struct nci_set_config_param param;
747 int rc;
748
749 param.val = nfc_get_local_general_bytes(nfc_dev, ¶m.len);
750 if ((param.val == NULL) || (param.len == 0))
751 return 0;
752
753 if (param.len > NFC_MAX_GT_LEN)
754 return -EINVAL;
755
756 param.id = NCI_PN_ATR_REQ_GEN_BYTES;
757
758 rc = nci_request(ndev, nci_set_config_req, ¶m,
759 msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
760 if (rc)
761 return rc;
762
763 param.id = NCI_LN_ATR_RES_GEN_BYTES;
764
765 return nci_request(ndev, nci_set_config_req, ¶m,
766 msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
767}
768
769static int nci_set_listen_parameters(struct nfc_dev *nfc_dev)
770{
771 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
772 int rc;
773 __u8 val;
774
775 val = NCI_LA_SEL_INFO_NFC_DEP_MASK;
776
777 rc = nci_set_config(ndev, NCI_LA_SEL_INFO, 1, &val);
778 if (rc)
779 return rc;
780
781 val = NCI_LF_PROTOCOL_TYPE_NFC_DEP_MASK;
782
783 rc = nci_set_config(ndev, NCI_LF_PROTOCOL_TYPE, 1, &val);
784 if (rc)
785 return rc;
786
787 val = NCI_LF_CON_BITR_F_212 | NCI_LF_CON_BITR_F_424;
788
789 return nci_set_config(ndev, NCI_LF_CON_BITR_F, 1, &val);
790}
791
792static int nci_start_poll(struct nfc_dev *nfc_dev,
793 __u32 im_protocols, __u32 tm_protocols)
794{
795 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
796 struct nci_rf_discover_param param;
797 int rc;
798
799 if ((atomic_read(&ndev->state) == NCI_DISCOVERY) ||
800 (atomic_read(&ndev->state) == NCI_W4_ALL_DISCOVERIES)) {
801 pr_err("unable to start poll, since poll is already active\n");
802 return -EBUSY;
803 }
804
805 if (ndev->target_active_prot) {
806 pr_err("there is an active target\n");
807 return -EBUSY;
808 }
809
810 if ((atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) ||
811 (atomic_read(&ndev->state) == NCI_POLL_ACTIVE)) {
812 pr_debug("target active or w4 select, implicitly deactivate\n");
813
814 rc = nci_request(ndev, nci_rf_deactivate_req,
815 (void *)NCI_DEACTIVATE_TYPE_IDLE_MODE,
816 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
817 if (rc)
818 return -EBUSY;
819 }
820
821 if ((im_protocols | tm_protocols) & NFC_PROTO_NFC_DEP_MASK) {
822 rc = nci_set_local_general_bytes(nfc_dev);
823 if (rc) {
824 pr_err("failed to set local general bytes\n");
825 return rc;
826 }
827 }
828
829 if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) {
830 rc = nci_set_listen_parameters(nfc_dev);
831 if (rc)
832 pr_err("failed to set listen parameters\n");
833 }
834
835 param.im_protocols = im_protocols;
836 param.tm_protocols = tm_protocols;
837 rc = nci_request(ndev, nci_rf_discover_req, ¶m,
838 msecs_to_jiffies(NCI_RF_DISC_TIMEOUT));
839
840 if (!rc)
841 ndev->poll_prots = im_protocols;
842
843 return rc;
844}
845
846static void nci_stop_poll(struct nfc_dev *nfc_dev)
847{
848 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
849
850 if ((atomic_read(&ndev->state) != NCI_DISCOVERY) &&
851 (atomic_read(&ndev->state) != NCI_W4_ALL_DISCOVERIES)) {
852 pr_err("unable to stop poll, since poll is not active\n");
853 return;
854 }
855
856 nci_request(ndev, nci_rf_deactivate_req,
857 (void *)NCI_DEACTIVATE_TYPE_IDLE_MODE,
858 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
859}
860
861static int nci_activate_target(struct nfc_dev *nfc_dev,
862 struct nfc_target *target, __u32 protocol)
863{
864 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
865 struct nci_rf_discover_select_param param;
866 const struct nfc_target *nci_target = NULL;
867 int i;
868 int rc = 0;
869
870 pr_debug("target_idx %d, protocol 0x%x\n", target->idx, protocol);
871
872 if ((atomic_read(&ndev->state) != NCI_W4_HOST_SELECT) &&
873 (atomic_read(&ndev->state) != NCI_POLL_ACTIVE)) {
874 pr_err("there is no available target to activate\n");
875 return -EINVAL;
876 }
877
878 if (ndev->target_active_prot) {
879 pr_err("there is already an active target\n");
880 return -EBUSY;
881 }
882
883 for (i = 0; i < ndev->n_targets; i++) {
884 if (ndev->targets[i].idx == target->idx) {
885 nci_target = &ndev->targets[i];
886 break;
887 }
888 }
889
890 if (!nci_target) {
891 pr_err("unable to find the selected target\n");
892 return -EINVAL;
893 }
894
895 if (!(nci_target->supported_protocols & (1 << protocol))) {
896 pr_err("target does not support the requested protocol 0x%x\n",
897 protocol);
898 return -EINVAL;
899 }
900
901 if (atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) {
902 param.rf_discovery_id = nci_target->logical_idx;
903
904 if (protocol == NFC_PROTO_JEWEL)
905 param.rf_protocol = NCI_RF_PROTOCOL_T1T;
906 else if (protocol == NFC_PROTO_MIFARE)
907 param.rf_protocol = NCI_RF_PROTOCOL_T2T;
908 else if (protocol == NFC_PROTO_FELICA)
909 param.rf_protocol = NCI_RF_PROTOCOL_T3T;
910 else if (protocol == NFC_PROTO_ISO14443 ||
911 protocol == NFC_PROTO_ISO14443_B)
912 param.rf_protocol = NCI_RF_PROTOCOL_ISO_DEP;
913 else
914 param.rf_protocol = NCI_RF_PROTOCOL_NFC_DEP;
915
916 rc = nci_request(ndev, nci_rf_discover_select_req, ¶m,
917 msecs_to_jiffies(NCI_RF_DISC_SELECT_TIMEOUT));
918 }
919
920 if (!rc)
921 ndev->target_active_prot = protocol;
922
923 return rc;
924}
925
926static void nci_deactivate_target(struct nfc_dev *nfc_dev,
927 struct nfc_target *target,
928 __u8 mode)
929{
930 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
931 unsigned long nci_mode = NCI_DEACTIVATE_TYPE_IDLE_MODE;
932
933 pr_debug("entry\n");
934
935 if (!ndev->target_active_prot) {
936 pr_err("unable to deactivate target, no active target\n");
937 return;
938 }
939
940 ndev->target_active_prot = 0;
941
942 switch (mode) {
943 case NFC_TARGET_MODE_SLEEP:
944 nci_mode = NCI_DEACTIVATE_TYPE_SLEEP_MODE;
945 break;
946 }
947
948 if (atomic_read(&ndev->state) == NCI_POLL_ACTIVE) {
949 nci_request(ndev, nci_rf_deactivate_req, (void *)nci_mode,
950 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
951 }
952}
953
954static int nci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
955 __u8 comm_mode, __u8 *gb, size_t gb_len)
956{
957 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
958 int rc;
959
960 pr_debug("target_idx %d, comm_mode %d\n", target->idx, comm_mode);
961
962 rc = nci_activate_target(nfc_dev, target, NFC_PROTO_NFC_DEP);
963 if (rc)
964 return rc;
965
966 rc = nfc_set_remote_general_bytes(nfc_dev, ndev->remote_gb,
967 ndev->remote_gb_len);
968 if (!rc)
969 rc = nfc_dep_link_is_up(nfc_dev, target->idx, NFC_COMM_PASSIVE,
970 NFC_RF_INITIATOR);
971
972 return rc;
973}
974
975static int nci_dep_link_down(struct nfc_dev *nfc_dev)
976{
977 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
978 int rc;
979
980 pr_debug("entry\n");
981
982 if (nfc_dev->rf_mode == NFC_RF_INITIATOR) {
983 nci_deactivate_target(nfc_dev, NULL, NCI_DEACTIVATE_TYPE_IDLE_MODE);
984 } else {
985 if (atomic_read(&ndev->state) == NCI_LISTEN_ACTIVE ||
986 atomic_read(&ndev->state) == NCI_DISCOVERY) {
987 nci_request(ndev, nci_rf_deactivate_req, (void *)0,
988 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
989 }
990
991 rc = nfc_tm_deactivated(nfc_dev);
992 if (rc)
993 pr_err("error when signaling tm deactivation\n");
994 }
995
996 return 0;
997}
998
999
1000static int nci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
1001 struct sk_buff *skb,
1002 data_exchange_cb_t cb, void *cb_context)
1003{
1004 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1005 int rc;
1006 struct nci_conn_info *conn_info;
1007
1008 conn_info = ndev->rf_conn_info;
1009 if (!conn_info)
1010 return -EPROTO;
1011
1012 pr_debug("target_idx %d, len %d\n", target->idx, skb->len);
1013
1014 if (!ndev->target_active_prot) {
1015 pr_err("unable to exchange data, no active target\n");
1016 return -EINVAL;
1017 }
1018
1019 if (test_and_set_bit(NCI_DATA_EXCHANGE, &ndev->flags))
1020 return -EBUSY;
1021
1022
1023 conn_info->data_exchange_cb = cb;
1024 conn_info->data_exchange_cb_context = cb_context;
1025
1026 rc = nci_send_data(ndev, NCI_STATIC_RF_CONN_ID, skb);
1027 if (rc)
1028 clear_bit(NCI_DATA_EXCHANGE, &ndev->flags);
1029
1030 return rc;
1031}
1032
1033static int nci_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
1034{
1035 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1036 int rc;
1037
1038 rc = nci_send_data(ndev, NCI_STATIC_RF_CONN_ID, skb);
1039 if (rc)
1040 pr_err("unable to send data\n");
1041
1042 return rc;
1043}
1044
1045static int nci_enable_se(struct nfc_dev *nfc_dev, u32 se_idx)
1046{
1047 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1048
1049 if (ndev->ops->enable_se)
1050 return ndev->ops->enable_se(ndev, se_idx);
1051
1052 return 0;
1053}
1054
1055static int nci_disable_se(struct nfc_dev *nfc_dev, u32 se_idx)
1056{
1057 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1058
1059 if (ndev->ops->disable_se)
1060 return ndev->ops->disable_se(ndev, se_idx);
1061
1062 return 0;
1063}
1064
1065static int nci_discover_se(struct nfc_dev *nfc_dev)
1066{
1067 int r;
1068 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1069
1070 if (ndev->ops->discover_se) {
1071 r = nci_nfcee_discover(ndev, NCI_NFCEE_DISCOVERY_ACTION_ENABLE);
1072 if (r != NCI_STATUS_OK)
1073 return -EPROTO;
1074
1075 return ndev->ops->discover_se(ndev);
1076 }
1077
1078 return 0;
1079}
1080
1081static int nci_se_io(struct nfc_dev *nfc_dev, u32 se_idx,
1082 u8 *apdu, size_t apdu_length,
1083 se_io_cb_t cb, void *cb_context)
1084{
1085 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1086
1087 if (ndev->ops->se_io)
1088 return ndev->ops->se_io(ndev, se_idx, apdu,
1089 apdu_length, cb, cb_context);
1090
1091 return 0;
1092}
1093
1094static int nci_fw_download(struct nfc_dev *nfc_dev, const char *firmware_name)
1095{
1096 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1097
1098 if (!ndev->ops->fw_download)
1099 return -ENOTSUPP;
1100
1101 return ndev->ops->fw_download(ndev, firmware_name);
1102}
1103
1104static const struct nfc_ops nci_nfc_ops = {
1105 .dev_up = nci_dev_up,
1106 .dev_down = nci_dev_down,
1107 .start_poll = nci_start_poll,
1108 .stop_poll = nci_stop_poll,
1109 .dep_link_up = nci_dep_link_up,
1110 .dep_link_down = nci_dep_link_down,
1111 .activate_target = nci_activate_target,
1112 .deactivate_target = nci_deactivate_target,
1113 .im_transceive = nci_transceive,
1114 .tm_send = nci_tm_send,
1115 .enable_se = nci_enable_se,
1116 .disable_se = nci_disable_se,
1117 .discover_se = nci_discover_se,
1118 .se_io = nci_se_io,
1119 .fw_download = nci_fw_download,
1120};
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131struct nci_dev *nci_allocate_device(const struct nci_ops *ops,
1132 __u32 supported_protocols,
1133 int tx_headroom, int tx_tailroom)
1134{
1135 struct nci_dev *ndev;
1136
1137 pr_debug("supported_protocols 0x%x\n", supported_protocols);
1138
1139 if (!ops->open || !ops->close || !ops->send)
1140 return NULL;
1141
1142 if (!supported_protocols)
1143 return NULL;
1144
1145 ndev = kzalloc(sizeof(struct nci_dev), GFP_KERNEL);
1146 if (!ndev)
1147 return NULL;
1148
1149 ndev->ops = ops;
1150
1151 if (ops->n_prop_ops > NCI_MAX_PROPRIETARY_CMD) {
1152 pr_err("Too many proprietary commands: %zd\n",
1153 ops->n_prop_ops);
1154 goto free_nci;
1155 }
1156
1157 ndev->tx_headroom = tx_headroom;
1158 ndev->tx_tailroom = tx_tailroom;
1159 init_completion(&ndev->req_completion);
1160
1161 ndev->nfc_dev = nfc_allocate_device(&nci_nfc_ops,
1162 supported_protocols,
1163 tx_headroom + NCI_DATA_HDR_SIZE,
1164 tx_tailroom);
1165 if (!ndev->nfc_dev)
1166 goto free_nci;
1167
1168 ndev->hci_dev = nci_hci_allocate(ndev);
1169 if (!ndev->hci_dev)
1170 goto free_nfc;
1171
1172 nfc_set_drvdata(ndev->nfc_dev, ndev);
1173
1174 return ndev;
1175
1176free_nfc:
1177 nfc_free_device(ndev->nfc_dev);
1178free_nci:
1179 kfree(ndev);
1180 return NULL;
1181}
1182EXPORT_SYMBOL(nci_allocate_device);
1183
1184
1185
1186
1187
1188
1189void nci_free_device(struct nci_dev *ndev)
1190{
1191 nfc_free_device(ndev->nfc_dev);
1192 nci_hci_deallocate(ndev);
1193 kfree(ndev);
1194}
1195EXPORT_SYMBOL(nci_free_device);
1196
1197
1198
1199
1200
1201
1202int nci_register_device(struct nci_dev *ndev)
1203{
1204 int rc;
1205 struct device *dev = &ndev->nfc_dev->dev;
1206 char name[32];
1207
1208 ndev->flags = 0;
1209
1210 INIT_WORK(&ndev->cmd_work, nci_cmd_work);
1211 snprintf(name, sizeof(name), "%s_nci_cmd_wq", dev_name(dev));
1212 ndev->cmd_wq = create_singlethread_workqueue(name);
1213 if (!ndev->cmd_wq) {
1214 rc = -ENOMEM;
1215 goto exit;
1216 }
1217
1218 INIT_WORK(&ndev->rx_work, nci_rx_work);
1219 snprintf(name, sizeof(name), "%s_nci_rx_wq", dev_name(dev));
1220 ndev->rx_wq = create_singlethread_workqueue(name);
1221 if (!ndev->rx_wq) {
1222 rc = -ENOMEM;
1223 goto destroy_cmd_wq_exit;
1224 }
1225
1226 INIT_WORK(&ndev->tx_work, nci_tx_work);
1227 snprintf(name, sizeof(name), "%s_nci_tx_wq", dev_name(dev));
1228 ndev->tx_wq = create_singlethread_workqueue(name);
1229 if (!ndev->tx_wq) {
1230 rc = -ENOMEM;
1231 goto destroy_rx_wq_exit;
1232 }
1233
1234 skb_queue_head_init(&ndev->cmd_q);
1235 skb_queue_head_init(&ndev->rx_q);
1236 skb_queue_head_init(&ndev->tx_q);
1237
1238 timer_setup(&ndev->cmd_timer, nci_cmd_timer, 0);
1239 timer_setup(&ndev->data_timer, nci_data_timer, 0);
1240
1241 mutex_init(&ndev->req_lock);
1242 INIT_LIST_HEAD(&ndev->conn_info_list);
1243
1244 rc = nfc_register_device(ndev->nfc_dev);
1245 if (rc)
1246 goto destroy_tx_wq_exit;
1247
1248 goto exit;
1249
1250destroy_tx_wq_exit:
1251 destroy_workqueue(ndev->tx_wq);
1252
1253destroy_rx_wq_exit:
1254 destroy_workqueue(ndev->rx_wq);
1255
1256destroy_cmd_wq_exit:
1257 destroy_workqueue(ndev->cmd_wq);
1258
1259exit:
1260 return rc;
1261}
1262EXPORT_SYMBOL(nci_register_device);
1263
1264
1265
1266
1267
1268
1269void nci_unregister_device(struct nci_dev *ndev)
1270{
1271 struct nci_conn_info *conn_info, *n;
1272
1273 nci_close_device(ndev);
1274
1275 destroy_workqueue(ndev->cmd_wq);
1276 destroy_workqueue(ndev->rx_wq);
1277 destroy_workqueue(ndev->tx_wq);
1278
1279 list_for_each_entry_safe(conn_info, n, &ndev->conn_info_list, list) {
1280 list_del(&conn_info->list);
1281
1282 }
1283
1284 nfc_unregister_device(ndev->nfc_dev);
1285}
1286EXPORT_SYMBOL(nci_unregister_device);
1287
1288
1289
1290
1291
1292
1293
1294int nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb)
1295{
1296 pr_debug("len %d\n", skb->len);
1297
1298 if (!ndev || (!test_bit(NCI_UP, &ndev->flags) &&
1299 !test_bit(NCI_INIT, &ndev->flags))) {
1300 kfree_skb(skb);
1301 return -ENXIO;
1302 }
1303
1304
1305 skb_queue_tail(&ndev->rx_q, skb);
1306 queue_work(ndev->rx_wq, &ndev->rx_work);
1307
1308 return 0;
1309}
1310EXPORT_SYMBOL(nci_recv_frame);
1311
1312int nci_send_frame(struct nci_dev *ndev, struct sk_buff *skb)
1313{
1314 pr_debug("len %d\n", skb->len);
1315
1316 if (!ndev) {
1317 kfree_skb(skb);
1318 return -ENODEV;
1319 }
1320
1321
1322 skb_orphan(skb);
1323
1324
1325 nfc_send_to_raw_sock(ndev->nfc_dev, skb,
1326 RAW_PAYLOAD_NCI, NFC_DIRECTION_TX);
1327
1328 return ndev->ops->send(ndev, skb);
1329}
1330EXPORT_SYMBOL(nci_send_frame);
1331
1332
1333int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, const void *payload)
1334{
1335 struct nci_ctrl_hdr *hdr;
1336 struct sk_buff *skb;
1337
1338 pr_debug("opcode 0x%x, plen %d\n", opcode, plen);
1339
1340 skb = nci_skb_alloc(ndev, (NCI_CTRL_HDR_SIZE + plen), GFP_KERNEL);
1341 if (!skb) {
1342 pr_err("no memory for command\n");
1343 return -ENOMEM;
1344 }
1345
1346 hdr = skb_put(skb, NCI_CTRL_HDR_SIZE);
1347 hdr->gid = nci_opcode_gid(opcode);
1348 hdr->oid = nci_opcode_oid(opcode);
1349 hdr->plen = plen;
1350
1351 nci_mt_set((__u8 *)hdr, NCI_MT_CMD_PKT);
1352 nci_pbf_set((__u8 *)hdr, NCI_PBF_LAST);
1353
1354 if (plen)
1355 skb_put_data(skb, payload, plen);
1356
1357 skb_queue_tail(&ndev->cmd_q, skb);
1358 queue_work(ndev->cmd_wq, &ndev->cmd_work);
1359
1360 return 0;
1361}
1362EXPORT_SYMBOL(nci_send_cmd);
1363
1364
1365static const struct nci_driver_ops *ops_cmd_lookup(const struct nci_driver_ops *ops,
1366 size_t n_ops,
1367 __u16 opcode)
1368{
1369 size_t i;
1370 const struct nci_driver_ops *op;
1371
1372 if (!ops || !n_ops)
1373 return NULL;
1374
1375 for (i = 0; i < n_ops; i++) {
1376 op = &ops[i];
1377 if (op->opcode == opcode)
1378 return op;
1379 }
1380
1381 return NULL;
1382}
1383
1384static int nci_op_rsp_packet(struct nci_dev *ndev, __u16 rsp_opcode,
1385 struct sk_buff *skb, const struct nci_driver_ops *ops,
1386 size_t n_ops)
1387{
1388 const struct nci_driver_ops *op;
1389
1390 op = ops_cmd_lookup(ops, n_ops, rsp_opcode);
1391 if (!op || !op->rsp)
1392 return -ENOTSUPP;
1393
1394 return op->rsp(ndev, skb);
1395}
1396
1397static int nci_op_ntf_packet(struct nci_dev *ndev, __u16 ntf_opcode,
1398 struct sk_buff *skb, const struct nci_driver_ops *ops,
1399 size_t n_ops)
1400{
1401 const struct nci_driver_ops *op;
1402
1403 op = ops_cmd_lookup(ops, n_ops, ntf_opcode);
1404 if (!op || !op->ntf)
1405 return -ENOTSUPP;
1406
1407 return op->ntf(ndev, skb);
1408}
1409
1410int nci_prop_rsp_packet(struct nci_dev *ndev, __u16 opcode,
1411 struct sk_buff *skb)
1412{
1413 return nci_op_rsp_packet(ndev, opcode, skb, ndev->ops->prop_ops,
1414 ndev->ops->n_prop_ops);
1415}
1416
1417int nci_prop_ntf_packet(struct nci_dev *ndev, __u16 opcode,
1418 struct sk_buff *skb)
1419{
1420 return nci_op_ntf_packet(ndev, opcode, skb, ndev->ops->prop_ops,
1421 ndev->ops->n_prop_ops);
1422}
1423
1424int nci_core_rsp_packet(struct nci_dev *ndev, __u16 opcode,
1425 struct sk_buff *skb)
1426{
1427 return nci_op_rsp_packet(ndev, opcode, skb, ndev->ops->core_ops,
1428 ndev->ops->n_core_ops);
1429}
1430
1431int nci_core_ntf_packet(struct nci_dev *ndev, __u16 opcode,
1432 struct sk_buff *skb)
1433{
1434 return nci_op_ntf_packet(ndev, opcode, skb, ndev->ops->core_ops,
1435 ndev->ops->n_core_ops);
1436}
1437
1438
1439
1440static void nci_tx_work(struct work_struct *work)
1441{
1442 struct nci_dev *ndev = container_of(work, struct nci_dev, tx_work);
1443 struct nci_conn_info *conn_info;
1444 struct sk_buff *skb;
1445
1446 conn_info = nci_get_conn_info_by_conn_id(ndev, ndev->cur_conn_id);
1447 if (!conn_info)
1448 return;
1449
1450 pr_debug("credits_cnt %d\n", atomic_read(&conn_info->credits_cnt));
1451
1452
1453 while (atomic_read(&conn_info->credits_cnt)) {
1454 skb = skb_dequeue(&ndev->tx_q);
1455 if (!skb)
1456 return;
1457
1458
1459 if (atomic_read(&conn_info->credits_cnt) !=
1460 NCI_DATA_FLOW_CONTROL_NOT_USED)
1461 atomic_dec(&conn_info->credits_cnt);
1462
1463 pr_debug("NCI TX: MT=data, PBF=%d, conn_id=%d, plen=%d\n",
1464 nci_pbf(skb->data),
1465 nci_conn_id(skb->data),
1466 nci_plen(skb->data));
1467
1468 nci_send_frame(ndev, skb);
1469
1470 mod_timer(&ndev->data_timer,
1471 jiffies + msecs_to_jiffies(NCI_DATA_TIMEOUT));
1472 }
1473}
1474
1475
1476
1477static void nci_rx_work(struct work_struct *work)
1478{
1479 struct nci_dev *ndev = container_of(work, struct nci_dev, rx_work);
1480 struct sk_buff *skb;
1481
1482 while ((skb = skb_dequeue(&ndev->rx_q))) {
1483
1484
1485 nfc_send_to_raw_sock(ndev->nfc_dev, skb,
1486 RAW_PAYLOAD_NCI, NFC_DIRECTION_RX);
1487
1488
1489 switch (nci_mt(skb->data)) {
1490 case NCI_MT_RSP_PKT:
1491 nci_rsp_packet(ndev, skb);
1492 break;
1493
1494 case NCI_MT_NTF_PKT:
1495 nci_ntf_packet(ndev, skb);
1496 break;
1497
1498 case NCI_MT_DATA_PKT:
1499 nci_rx_data_packet(ndev, skb);
1500 break;
1501
1502 default:
1503 pr_err("unknown MT 0x%x\n", nci_mt(skb->data));
1504 kfree_skb(skb);
1505 break;
1506 }
1507 }
1508
1509
1510 if (test_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags)) {
1511
1512 if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags))
1513 nci_data_exchange_complete(ndev, NULL,
1514 ndev->cur_conn_id,
1515 -ETIMEDOUT);
1516
1517 clear_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags);
1518 }
1519}
1520
1521
1522
1523static void nci_cmd_work(struct work_struct *work)
1524{
1525 struct nci_dev *ndev = container_of(work, struct nci_dev, cmd_work);
1526 struct sk_buff *skb;
1527
1528 pr_debug("cmd_cnt %d\n", atomic_read(&ndev->cmd_cnt));
1529
1530
1531 if (atomic_read(&ndev->cmd_cnt)) {
1532 skb = skb_dequeue(&ndev->cmd_q);
1533 if (!skb)
1534 return;
1535
1536 atomic_dec(&ndev->cmd_cnt);
1537
1538 pr_debug("NCI TX: MT=cmd, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n",
1539 nci_pbf(skb->data),
1540 nci_opcode_gid(nci_opcode(skb->data)),
1541 nci_opcode_oid(nci_opcode(skb->data)),
1542 nci_plen(skb->data));
1543
1544 nci_send_frame(ndev, skb);
1545
1546 mod_timer(&ndev->cmd_timer,
1547 jiffies + msecs_to_jiffies(NCI_CMD_TIMEOUT));
1548 }
1549}
1550
1551MODULE_LICENSE("GPL");
1552
