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