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Merge tag 'firewire-update2' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee139...
[deliverable/linux.git] / net / nfc / nci / core.c
1 /*
2 * The NFC Controller Interface is the communication protocol between an
3 * NFC Controller (NFCC) and a Device Host (DH).
4 *
5 * Copyright (C) 2011 Texas Instruments, Inc.
6 * Copyright (C) 2014 Marvell International Ltd.
7 *
8 * Written by Ilan Elias <ilane@ti.com>
9 *
10 * Acknowledgements:
11 * This file is based on hci_core.c, which was written
12 * by Maxim Krasnyansky.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2
16 * as published by the Free Software Foundation
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, see <http://www.gnu.org/licenses/>.
25 *
26 */
27
28 #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
29
30 #include <linux/module.h>
31 #include <linux/kernel.h>
32 #include <linux/types.h>
33 #include <linux/workqueue.h>
34 #include <linux/completion.h>
35 #include <linux/export.h>
36 #include <linux/sched.h>
37 #include <linux/bitops.h>
38 #include <linux/skbuff.h>
39
40 #include "../nfc.h"
41 #include <net/nfc/nci.h>
42 #include <net/nfc/nci_core.h>
43 #include <linux/nfc.h>
44
45 struct core_conn_create_data {
46 int length;
47 struct nci_core_conn_create_cmd *cmd;
48 };
49
50 static void nci_cmd_work(struct work_struct *work);
51 static void nci_rx_work(struct work_struct *work);
52 static void nci_tx_work(struct work_struct *work);
53
54 struct nci_conn_info *nci_get_conn_info_by_conn_id(struct nci_dev *ndev,
55 int conn_id)
56 {
57 struct nci_conn_info *conn_info;
58
59 list_for_each_entry(conn_info, &ndev->conn_info_list, list) {
60 if (conn_info->conn_id == conn_id)
61 return conn_info;
62 }
63
64 return NULL;
65 }
66
67 int nci_get_conn_info_by_id(struct nci_dev *ndev, u8 id)
68 {
69 struct nci_conn_info *conn_info;
70
71 list_for_each_entry(conn_info, &ndev->conn_info_list, list) {
72 if (conn_info->id == id)
73 return conn_info->conn_id;
74 }
75
76 return -EINVAL;
77 }
78 EXPORT_SYMBOL(nci_get_conn_info_by_id);
79
80 /* ---- NCI requests ---- */
81
82 void nci_req_complete(struct nci_dev *ndev, int result)
83 {
84 if (ndev->req_status == NCI_REQ_PEND) {
85 ndev->req_result = result;
86 ndev->req_status = NCI_REQ_DONE;
87 complete(&ndev->req_completion);
88 }
89 }
90 EXPORT_SYMBOL(nci_req_complete);
91
92 static void nci_req_cancel(struct nci_dev *ndev, int err)
93 {
94 if (ndev->req_status == NCI_REQ_PEND) {
95 ndev->req_result = err;
96 ndev->req_status = NCI_REQ_CANCELED;
97 complete(&ndev->req_completion);
98 }
99 }
100
101 /* Execute request and wait for completion. */
102 static int __nci_request(struct nci_dev *ndev,
103 void (*req)(struct nci_dev *ndev, unsigned long opt),
104 unsigned long opt, __u32 timeout)
105 {
106 int rc = 0;
107 long completion_rc;
108
109 ndev->req_status = NCI_REQ_PEND;
110
111 reinit_completion(&ndev->req_completion);
112 req(ndev, opt);
113 completion_rc =
114 wait_for_completion_interruptible_timeout(&ndev->req_completion,
115 timeout);
116
117 pr_debug("wait_for_completion return %ld\n", completion_rc);
118
119 if (completion_rc > 0) {
120 switch (ndev->req_status) {
121 case NCI_REQ_DONE:
122 rc = nci_to_errno(ndev->req_result);
123 break;
124
125 case NCI_REQ_CANCELED:
126 rc = -ndev->req_result;
127 break;
128
129 default:
130 rc = -ETIMEDOUT;
131 break;
132 }
133 } else {
134 pr_err("wait_for_completion_interruptible_timeout failed %ld\n",
135 completion_rc);
136
137 rc = ((completion_rc == 0) ? (-ETIMEDOUT) : (completion_rc));
138 }
139
140 ndev->req_status = ndev->req_result = 0;
141
142 return rc;
143 }
144
145 inline int nci_request(struct nci_dev *ndev,
146 void (*req)(struct nci_dev *ndev,
147 unsigned long opt),
148 unsigned long opt, __u32 timeout)
149 {
150 int rc;
151
152 if (!test_bit(NCI_UP, &ndev->flags))
153 return -ENETDOWN;
154
155 /* Serialize all requests */
156 mutex_lock(&ndev->req_lock);
157 rc = __nci_request(ndev, req, opt, timeout);
158 mutex_unlock(&ndev->req_lock);
159
160 return rc;
161 }
162
163 static void nci_reset_req(struct nci_dev *ndev, unsigned long opt)
164 {
165 struct nci_core_reset_cmd cmd;
166
167 cmd.reset_type = NCI_RESET_TYPE_RESET_CONFIG;
168 nci_send_cmd(ndev, NCI_OP_CORE_RESET_CMD, 1, &cmd);
169 }
170
171 static void nci_init_req(struct nci_dev *ndev, unsigned long opt)
172 {
173 nci_send_cmd(ndev, NCI_OP_CORE_INIT_CMD, 0, NULL);
174 }
175
176 static void nci_init_complete_req(struct nci_dev *ndev, unsigned long 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 /* set rf mapping configurations */
184 *num = 0;
185
186 /* by default mapping is set to NCI_RF_INTERFACE_FRAME */
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
212 struct nci_set_config_param {
213 __u8 id;
214 size_t len;
215 __u8 *val;
216 };
217
218 static void nci_set_config_req(struct nci_dev *ndev, unsigned long opt)
219 {
220 struct nci_set_config_param *param = (struct nci_set_config_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
233 struct nci_rf_discover_param {
234 __u32 im_protocols;
235 __u32 tm_protocols;
236 };
237
238 static void nci_rf_discover_req(struct nci_dev *ndev, unsigned long opt)
239 {
240 struct nci_rf_discover_param *param =
241 (struct nci_rf_discover_param *)opt;
242 struct nci_rf_disc_cmd cmd;
243
244 cmd.num_disc_configs = 0;
245
246 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
247 (param->im_protocols & NFC_PROTO_JEWEL_MASK ||
248 param->im_protocols & NFC_PROTO_MIFARE_MASK ||
249 param->im_protocols & NFC_PROTO_ISO14443_MASK ||
250 param->im_protocols & NFC_PROTO_NFC_DEP_MASK)) {
251 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
252 NCI_NFC_A_PASSIVE_POLL_MODE;
253 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
254 cmd.num_disc_configs++;
255 }
256
257 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
258 (param->im_protocols & NFC_PROTO_ISO14443_B_MASK)) {
259 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
260 NCI_NFC_B_PASSIVE_POLL_MODE;
261 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
262 cmd.num_disc_configs++;
263 }
264
265 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
266 (param->im_protocols & NFC_PROTO_FELICA_MASK ||
267 param->im_protocols & NFC_PROTO_NFC_DEP_MASK)) {
268 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
269 NCI_NFC_F_PASSIVE_POLL_MODE;
270 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
271 cmd.num_disc_configs++;
272 }
273
274 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS) &&
275 (param->im_protocols & NFC_PROTO_ISO15693_MASK)) {
276 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
277 NCI_NFC_V_PASSIVE_POLL_MODE;
278 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
279 cmd.num_disc_configs++;
280 }
281
282 if ((cmd.num_disc_configs < NCI_MAX_NUM_RF_CONFIGS - 1) &&
283 (param->tm_protocols & NFC_PROTO_NFC_DEP_MASK)) {
284 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
285 NCI_NFC_A_PASSIVE_LISTEN_MODE;
286 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
287 cmd.num_disc_configs++;
288 cmd.disc_configs[cmd.num_disc_configs].rf_tech_and_mode =
289 NCI_NFC_F_PASSIVE_LISTEN_MODE;
290 cmd.disc_configs[cmd.num_disc_configs].frequency = 1;
291 cmd.num_disc_configs++;
292 }
293
294 nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_CMD,
295 (1 + (cmd.num_disc_configs * sizeof(struct disc_config))),
296 &cmd);
297 }
298
299 struct nci_rf_discover_select_param {
300 __u8 rf_discovery_id;
301 __u8 rf_protocol;
302 };
303
304 static void nci_rf_discover_select_req(struct nci_dev *ndev, unsigned long opt)
305 {
306 struct nci_rf_discover_select_param *param =
307 (struct nci_rf_discover_select_param *)opt;
308 struct nci_rf_discover_select_cmd cmd;
309
310 cmd.rf_discovery_id = param->rf_discovery_id;
311 cmd.rf_protocol = param->rf_protocol;
312
313 switch (cmd.rf_protocol) {
314 case NCI_RF_PROTOCOL_ISO_DEP:
315 cmd.rf_interface = NCI_RF_INTERFACE_ISO_DEP;
316 break;
317
318 case NCI_RF_PROTOCOL_NFC_DEP:
319 cmd.rf_interface = NCI_RF_INTERFACE_NFC_DEP;
320 break;
321
322 default:
323 cmd.rf_interface = NCI_RF_INTERFACE_FRAME;
324 break;
325 }
326
327 nci_send_cmd(ndev, NCI_OP_RF_DISCOVER_SELECT_CMD,
328 sizeof(struct nci_rf_discover_select_cmd), &cmd);
329 }
330
331 static void nci_rf_deactivate_req(struct nci_dev *ndev, unsigned long opt)
332 {
333 struct nci_rf_deactivate_cmd cmd;
334
335 cmd.type = opt;
336
337 nci_send_cmd(ndev, NCI_OP_RF_DEACTIVATE_CMD,
338 sizeof(struct nci_rf_deactivate_cmd), &cmd);
339 }
340
341 struct nci_cmd_param {
342 __u16 opcode;
343 size_t len;
344 __u8 *payload;
345 };
346
347 static void nci_generic_req(struct nci_dev *ndev, unsigned long opt)
348 {
349 struct nci_cmd_param *param =
350 (struct nci_cmd_param *)opt;
351
352 nci_send_cmd(ndev, param->opcode, param->len, param->payload);
353 }
354
355 int nci_prop_cmd(struct nci_dev *ndev, __u8 oid, size_t len, __u8 *payload)
356 {
357 struct nci_cmd_param param;
358
359 param.opcode = nci_opcode_pack(NCI_GID_PROPRIETARY, oid);
360 param.len = len;
361 param.payload = payload;
362
363 return __nci_request(ndev, nci_generic_req, (unsigned long)&param,
364 msecs_to_jiffies(NCI_CMD_TIMEOUT));
365 }
366 EXPORT_SYMBOL(nci_prop_cmd);
367
368 int nci_core_cmd(struct nci_dev *ndev, __u16 opcode, size_t len, __u8 *payload)
369 {
370 struct nci_cmd_param param;
371
372 param.opcode = opcode;
373 param.len = len;
374 param.payload = payload;
375
376 return __nci_request(ndev, nci_generic_req, (unsigned long)&param,
377 msecs_to_jiffies(NCI_CMD_TIMEOUT));
378 }
379 EXPORT_SYMBOL(nci_core_cmd);
380
381 int nci_core_reset(struct nci_dev *ndev)
382 {
383 return __nci_request(ndev, nci_reset_req, 0,
384 msecs_to_jiffies(NCI_RESET_TIMEOUT));
385 }
386 EXPORT_SYMBOL(nci_core_reset);
387
388 int nci_core_init(struct nci_dev *ndev)
389 {
390 return __nci_request(ndev, nci_init_req, 0,
391 msecs_to_jiffies(NCI_INIT_TIMEOUT));
392 }
393 EXPORT_SYMBOL(nci_core_init);
394
395 static int nci_open_device(struct nci_dev *ndev)
396 {
397 int rc = 0;
398
399 mutex_lock(&ndev->req_lock);
400
401 if (test_bit(NCI_UP, &ndev->flags)) {
402 rc = -EALREADY;
403 goto done;
404 }
405
406 if (ndev->ops->open(ndev)) {
407 rc = -EIO;
408 goto done;
409 }
410
411 atomic_set(&ndev->cmd_cnt, 1);
412
413 set_bit(NCI_INIT, &ndev->flags);
414
415 if (ndev->ops->init)
416 rc = ndev->ops->init(ndev);
417
418 if (!rc) {
419 rc = __nci_request(ndev, nci_reset_req, 0,
420 msecs_to_jiffies(NCI_RESET_TIMEOUT));
421 }
422
423 if (!rc && ndev->ops->setup) {
424 rc = ndev->ops->setup(ndev);
425 }
426
427 if (!rc) {
428 rc = __nci_request(ndev, nci_init_req, 0,
429 msecs_to_jiffies(NCI_INIT_TIMEOUT));
430 }
431
432 if (!rc && ndev->ops->post_setup)
433 rc = ndev->ops->post_setup(ndev);
434
435 if (!rc) {
436 rc = __nci_request(ndev, nci_init_complete_req, 0,
437 msecs_to_jiffies(NCI_INIT_TIMEOUT));
438 }
439
440 clear_bit(NCI_INIT, &ndev->flags);
441
442 if (!rc) {
443 set_bit(NCI_UP, &ndev->flags);
444 nci_clear_target_list(ndev);
445 atomic_set(&ndev->state, NCI_IDLE);
446 } else {
447 /* Init failed, cleanup */
448 skb_queue_purge(&ndev->cmd_q);
449 skb_queue_purge(&ndev->rx_q);
450 skb_queue_purge(&ndev->tx_q);
451
452 ndev->ops->close(ndev);
453 ndev->flags = 0;
454 }
455
456 done:
457 mutex_unlock(&ndev->req_lock);
458 return rc;
459 }
460
461 static int nci_close_device(struct nci_dev *ndev)
462 {
463 nci_req_cancel(ndev, ENODEV);
464 mutex_lock(&ndev->req_lock);
465
466 if (!test_and_clear_bit(NCI_UP, &ndev->flags)) {
467 del_timer_sync(&ndev->cmd_timer);
468 del_timer_sync(&ndev->data_timer);
469 mutex_unlock(&ndev->req_lock);
470 return 0;
471 }
472
473 /* Drop RX and TX queues */
474 skb_queue_purge(&ndev->rx_q);
475 skb_queue_purge(&ndev->tx_q);
476
477 /* Flush RX and TX wq */
478 flush_workqueue(ndev->rx_wq);
479 flush_workqueue(ndev->tx_wq);
480
481 /* Reset device */
482 skb_queue_purge(&ndev->cmd_q);
483 atomic_set(&ndev->cmd_cnt, 1);
484
485 set_bit(NCI_INIT, &ndev->flags);
486 __nci_request(ndev, nci_reset_req, 0,
487 msecs_to_jiffies(NCI_RESET_TIMEOUT));
488
489 /* After this point our queues are empty
490 * and no works are scheduled.
491 */
492 ndev->ops->close(ndev);
493
494 clear_bit(NCI_INIT, &ndev->flags);
495
496 del_timer_sync(&ndev->cmd_timer);
497
498 /* Flush cmd wq */
499 flush_workqueue(ndev->cmd_wq);
500
501 /* Clear flags */
502 ndev->flags = 0;
503
504 mutex_unlock(&ndev->req_lock);
505
506 return 0;
507 }
508
509 /* NCI command timer function */
510 static void nci_cmd_timer(unsigned long arg)
511 {
512 struct nci_dev *ndev = (void *) arg;
513
514 atomic_set(&ndev->cmd_cnt, 1);
515 queue_work(ndev->cmd_wq, &ndev->cmd_work);
516 }
517
518 /* NCI data exchange timer function */
519 static void nci_data_timer(unsigned long arg)
520 {
521 struct nci_dev *ndev = (void *) arg;
522
523 set_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags);
524 queue_work(ndev->rx_wq, &ndev->rx_work);
525 }
526
527 static int nci_dev_up(struct nfc_dev *nfc_dev)
528 {
529 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
530
531 return nci_open_device(ndev);
532 }
533
534 static int nci_dev_down(struct nfc_dev *nfc_dev)
535 {
536 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
537
538 return nci_close_device(ndev);
539 }
540
541 int nci_set_config(struct nci_dev *ndev, __u8 id, size_t len, __u8 *val)
542 {
543 struct nci_set_config_param param;
544
545 if (!val || !len)
546 return 0;
547
548 param.id = id;
549 param.len = len;
550 param.val = val;
551
552 return __nci_request(ndev, nci_set_config_req, (unsigned long)&param,
553 msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
554 }
555 EXPORT_SYMBOL(nci_set_config);
556
557 static void nci_nfcee_discover_req(struct nci_dev *ndev, unsigned long opt)
558 {
559 struct nci_nfcee_discover_cmd cmd;
560 __u8 action = opt;
561
562 cmd.discovery_action = action;
563
564 nci_send_cmd(ndev, NCI_OP_NFCEE_DISCOVER_CMD, 1, &cmd);
565 }
566
567 int nci_nfcee_discover(struct nci_dev *ndev, u8 action)
568 {
569 return __nci_request(ndev, nci_nfcee_discover_req, action,
570 msecs_to_jiffies(NCI_CMD_TIMEOUT));
571 }
572 EXPORT_SYMBOL(nci_nfcee_discover);
573
574 static void nci_nfcee_mode_set_req(struct nci_dev *ndev, unsigned long opt)
575 {
576 struct nci_nfcee_mode_set_cmd *cmd =
577 (struct nci_nfcee_mode_set_cmd *)opt;
578
579 nci_send_cmd(ndev, NCI_OP_NFCEE_MODE_SET_CMD,
580 sizeof(struct nci_nfcee_mode_set_cmd), cmd);
581 }
582
583 int nci_nfcee_mode_set(struct nci_dev *ndev, u8 nfcee_id, u8 nfcee_mode)
584 {
585 struct nci_nfcee_mode_set_cmd cmd;
586
587 cmd.nfcee_id = nfcee_id;
588 cmd.nfcee_mode = nfcee_mode;
589
590 return __nci_request(ndev, nci_nfcee_mode_set_req,
591 (unsigned long)&cmd,
592 msecs_to_jiffies(NCI_CMD_TIMEOUT));
593 }
594 EXPORT_SYMBOL(nci_nfcee_mode_set);
595
596 static void nci_core_conn_create_req(struct nci_dev *ndev, unsigned long opt)
597 {
598 struct core_conn_create_data *data =
599 (struct core_conn_create_data *)opt;
600
601 nci_send_cmd(ndev, NCI_OP_CORE_CONN_CREATE_CMD, data->length, data->cmd);
602 }
603
604 int nci_core_conn_create(struct nci_dev *ndev, u8 destination_type,
605 u8 number_destination_params,
606 size_t params_len,
607 struct core_conn_create_dest_spec_params *params)
608 {
609 int r;
610 struct nci_core_conn_create_cmd *cmd;
611 struct core_conn_create_data data;
612
613 if (!number_destination_params)
614 return -EINVAL;
615
616 data.length = params_len + sizeof(struct nci_core_conn_create_cmd);
617 cmd = kzalloc(data.length, GFP_KERNEL);
618 if (!cmd)
619 return -ENOMEM;
620
621 cmd->destination_type = destination_type;
622 cmd->number_destination_params = number_destination_params;
623 memcpy(cmd->params, params, params_len);
624
625 data.cmd = cmd;
626
627 if (params->length > 0)
628 ndev->cur_id = params->value[DEST_SPEC_PARAMS_ID_INDEX];
629 else
630 ndev->cur_id = 0;
631
632 r = __nci_request(ndev, nci_core_conn_create_req,
633 (unsigned long)&data,
634 msecs_to_jiffies(NCI_CMD_TIMEOUT));
635 kfree(cmd);
636 return r;
637 }
638 EXPORT_SYMBOL(nci_core_conn_create);
639
640 static void nci_core_conn_close_req(struct nci_dev *ndev, unsigned long opt)
641 {
642 __u8 conn_id = opt;
643
644 nci_send_cmd(ndev, NCI_OP_CORE_CONN_CLOSE_CMD, 1, &conn_id);
645 }
646
647 int nci_core_conn_close(struct nci_dev *ndev, u8 conn_id)
648 {
649 return __nci_request(ndev, nci_core_conn_close_req, conn_id,
650 msecs_to_jiffies(NCI_CMD_TIMEOUT));
651 }
652 EXPORT_SYMBOL(nci_core_conn_close);
653
654 static int nci_set_local_general_bytes(struct nfc_dev *nfc_dev)
655 {
656 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
657 struct nci_set_config_param param;
658 int rc;
659
660 param.val = nfc_get_local_general_bytes(nfc_dev, &param.len);
661 if ((param.val == NULL) || (param.len == 0))
662 return 0;
663
664 if (param.len > NFC_MAX_GT_LEN)
665 return -EINVAL;
666
667 param.id = NCI_PN_ATR_REQ_GEN_BYTES;
668
669 rc = nci_request(ndev, nci_set_config_req, (unsigned long)&param,
670 msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
671 if (rc)
672 return rc;
673
674 param.id = NCI_LN_ATR_RES_GEN_BYTES;
675
676 return nci_request(ndev, nci_set_config_req, (unsigned long)&param,
677 msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
678 }
679
680 static int nci_set_listen_parameters(struct nfc_dev *nfc_dev)
681 {
682 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
683 int rc;
684 __u8 val;
685
686 val = NCI_LA_SEL_INFO_NFC_DEP_MASK;
687
688 rc = nci_set_config(ndev, NCI_LA_SEL_INFO, 1, &val);
689 if (rc)
690 return rc;
691
692 val = NCI_LF_PROTOCOL_TYPE_NFC_DEP_MASK;
693
694 rc = nci_set_config(ndev, NCI_LF_PROTOCOL_TYPE, 1, &val);
695 if (rc)
696 return rc;
697
698 val = NCI_LF_CON_BITR_F_212 | NCI_LF_CON_BITR_F_424;
699
700 return nci_set_config(ndev, NCI_LF_CON_BITR_F, 1, &val);
701 }
702
703 static int nci_start_poll(struct nfc_dev *nfc_dev,
704 __u32 im_protocols, __u32 tm_protocols)
705 {
706 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
707 struct nci_rf_discover_param param;
708 int rc;
709
710 if ((atomic_read(&ndev->state) == NCI_DISCOVERY) ||
711 (atomic_read(&ndev->state) == NCI_W4_ALL_DISCOVERIES)) {
712 pr_err("unable to start poll, since poll is already active\n");
713 return -EBUSY;
714 }
715
716 if (ndev->target_active_prot) {
717 pr_err("there is an active target\n");
718 return -EBUSY;
719 }
720
721 if ((atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) ||
722 (atomic_read(&ndev->state) == NCI_POLL_ACTIVE)) {
723 pr_debug("target active or w4 select, implicitly deactivate\n");
724
725 rc = nci_request(ndev, nci_rf_deactivate_req,
726 NCI_DEACTIVATE_TYPE_IDLE_MODE,
727 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
728 if (rc)
729 return -EBUSY;
730 }
731
732 if ((im_protocols | tm_protocols) & NFC_PROTO_NFC_DEP_MASK) {
733 rc = nci_set_local_general_bytes(nfc_dev);
734 if (rc) {
735 pr_err("failed to set local general bytes\n");
736 return rc;
737 }
738 }
739
740 if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) {
741 rc = nci_set_listen_parameters(nfc_dev);
742 if (rc)
743 pr_err("failed to set listen parameters\n");
744 }
745
746 param.im_protocols = im_protocols;
747 param.tm_protocols = tm_protocols;
748 rc = nci_request(ndev, nci_rf_discover_req, (unsigned long)&param,
749 msecs_to_jiffies(NCI_RF_DISC_TIMEOUT));
750
751 if (!rc)
752 ndev->poll_prots = im_protocols;
753
754 return rc;
755 }
756
757 static void nci_stop_poll(struct nfc_dev *nfc_dev)
758 {
759 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
760
761 if ((atomic_read(&ndev->state) != NCI_DISCOVERY) &&
762 (atomic_read(&ndev->state) != NCI_W4_ALL_DISCOVERIES)) {
763 pr_err("unable to stop poll, since poll is not active\n");
764 return;
765 }
766
767 nci_request(ndev, nci_rf_deactivate_req, NCI_DEACTIVATE_TYPE_IDLE_MODE,
768 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
769 }
770
771 static int nci_activate_target(struct nfc_dev *nfc_dev,
772 struct nfc_target *target, __u32 protocol)
773 {
774 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
775 struct nci_rf_discover_select_param param;
776 struct nfc_target *nci_target = NULL;
777 int i;
778 int rc = 0;
779
780 pr_debug("target_idx %d, protocol 0x%x\n", target->idx, protocol);
781
782 if ((atomic_read(&ndev->state) != NCI_W4_HOST_SELECT) &&
783 (atomic_read(&ndev->state) != NCI_POLL_ACTIVE)) {
784 pr_err("there is no available target to activate\n");
785 return -EINVAL;
786 }
787
788 if (ndev->target_active_prot) {
789 pr_err("there is already an active target\n");
790 return -EBUSY;
791 }
792
793 for (i = 0; i < ndev->n_targets; i++) {
794 if (ndev->targets[i].idx == target->idx) {
795 nci_target = &ndev->targets[i];
796 break;
797 }
798 }
799
800 if (!nci_target) {
801 pr_err("unable to find the selected target\n");
802 return -EINVAL;
803 }
804
805 if (!(nci_target->supported_protocols & (1 << protocol))) {
806 pr_err("target does not support the requested protocol 0x%x\n",
807 protocol);
808 return -EINVAL;
809 }
810
811 if (atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) {
812 param.rf_discovery_id = nci_target->logical_idx;
813
814 if (protocol == NFC_PROTO_JEWEL)
815 param.rf_protocol = NCI_RF_PROTOCOL_T1T;
816 else if (protocol == NFC_PROTO_MIFARE)
817 param.rf_protocol = NCI_RF_PROTOCOL_T2T;
818 else if (protocol == NFC_PROTO_FELICA)
819 param.rf_protocol = NCI_RF_PROTOCOL_T3T;
820 else if (protocol == NFC_PROTO_ISO14443 ||
821 protocol == NFC_PROTO_ISO14443_B)
822 param.rf_protocol = NCI_RF_PROTOCOL_ISO_DEP;
823 else
824 param.rf_protocol = NCI_RF_PROTOCOL_NFC_DEP;
825
826 rc = nci_request(ndev, nci_rf_discover_select_req,
827 (unsigned long)&param,
828 msecs_to_jiffies(NCI_RF_DISC_SELECT_TIMEOUT));
829 }
830
831 if (!rc)
832 ndev->target_active_prot = protocol;
833
834 return rc;
835 }
836
837 static void nci_deactivate_target(struct nfc_dev *nfc_dev,
838 struct nfc_target *target,
839 __u8 mode)
840 {
841 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
842 u8 nci_mode = NCI_DEACTIVATE_TYPE_IDLE_MODE;
843
844 pr_debug("entry\n");
845
846 if (!ndev->target_active_prot) {
847 pr_err("unable to deactivate target, no active target\n");
848 return;
849 }
850
851 ndev->target_active_prot = 0;
852
853 switch (mode) {
854 case NFC_TARGET_MODE_SLEEP:
855 nci_mode = NCI_DEACTIVATE_TYPE_SLEEP_MODE;
856 break;
857 }
858
859 if (atomic_read(&ndev->state) == NCI_POLL_ACTIVE) {
860 nci_request(ndev, nci_rf_deactivate_req, nci_mode,
861 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
862 }
863 }
864
865 static int nci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
866 __u8 comm_mode, __u8 *gb, size_t gb_len)
867 {
868 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
869 int rc;
870
871 pr_debug("target_idx %d, comm_mode %d\n", target->idx, comm_mode);
872
873 rc = nci_activate_target(nfc_dev, target, NFC_PROTO_NFC_DEP);
874 if (rc)
875 return rc;
876
877 rc = nfc_set_remote_general_bytes(nfc_dev, ndev->remote_gb,
878 ndev->remote_gb_len);
879 if (!rc)
880 rc = nfc_dep_link_is_up(nfc_dev, target->idx, NFC_COMM_PASSIVE,
881 NFC_RF_INITIATOR);
882
883 return rc;
884 }
885
886 static int nci_dep_link_down(struct nfc_dev *nfc_dev)
887 {
888 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
889 int rc;
890
891 pr_debug("entry\n");
892
893 if (nfc_dev->rf_mode == NFC_RF_INITIATOR) {
894 nci_deactivate_target(nfc_dev, NULL, NCI_DEACTIVATE_TYPE_IDLE_MODE);
895 } else {
896 if (atomic_read(&ndev->state) == NCI_LISTEN_ACTIVE ||
897 atomic_read(&ndev->state) == NCI_DISCOVERY) {
898 nci_request(ndev, nci_rf_deactivate_req, 0,
899 msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));
900 }
901
902 rc = nfc_tm_deactivated(nfc_dev);
903 if (rc)
904 pr_err("error when signaling tm deactivation\n");
905 }
906
907 return 0;
908 }
909
910
911 static int nci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
912 struct sk_buff *skb,
913 data_exchange_cb_t cb, void *cb_context)
914 {
915 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
916 int rc;
917 struct nci_conn_info *conn_info;
918
919 conn_info = ndev->rf_conn_info;
920 if (!conn_info)
921 return -EPROTO;
922
923 pr_debug("target_idx %d, len %d\n", target->idx, skb->len);
924
925 if (!ndev->target_active_prot) {
926 pr_err("unable to exchange data, no active target\n");
927 return -EINVAL;
928 }
929
930 if (test_and_set_bit(NCI_DATA_EXCHANGE, &ndev->flags))
931 return -EBUSY;
932
933 /* store cb and context to be used on receiving data */
934 conn_info->data_exchange_cb = cb;
935 conn_info->data_exchange_cb_context = cb_context;
936
937 rc = nci_send_data(ndev, NCI_STATIC_RF_CONN_ID, skb);
938 if (rc)
939 clear_bit(NCI_DATA_EXCHANGE, &ndev->flags);
940
941 return rc;
942 }
943
944 static int nci_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
945 {
946 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
947 int rc;
948
949 rc = nci_send_data(ndev, NCI_STATIC_RF_CONN_ID, skb);
950 if (rc)
951 pr_err("unable to send data\n");
952
953 return rc;
954 }
955
956 static int nci_enable_se(struct nfc_dev *nfc_dev, u32 se_idx)
957 {
958 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
959
960 if (ndev->ops->enable_se)
961 return ndev->ops->enable_se(ndev, se_idx);
962
963 return 0;
964 }
965
966 static int nci_disable_se(struct nfc_dev *nfc_dev, u32 se_idx)
967 {
968 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
969
970 if (ndev->ops->disable_se)
971 return ndev->ops->disable_se(ndev, se_idx);
972
973 return 0;
974 }
975
976 static int nci_discover_se(struct nfc_dev *nfc_dev)
977 {
978 int r;
979 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
980
981 if (ndev->ops->discover_se) {
982 r = nci_nfcee_discover(ndev, NCI_NFCEE_DISCOVERY_ACTION_ENABLE);
983 if (r != NCI_STATUS_OK)
984 return -EPROTO;
985
986 return ndev->ops->discover_se(ndev);
987 }
988
989 return 0;
990 }
991
992 static int nci_se_io(struct nfc_dev *nfc_dev, u32 se_idx,
993 u8 *apdu, size_t apdu_length,
994 se_io_cb_t cb, void *cb_context)
995 {
996 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
997
998 if (ndev->ops->se_io)
999 return ndev->ops->se_io(ndev, se_idx, apdu,
1000 apdu_length, cb, cb_context);
1001
1002 return 0;
1003 }
1004
1005 static int nci_fw_download(struct nfc_dev *nfc_dev, const char *firmware_name)
1006 {
1007 struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
1008
1009 if (!ndev->ops->fw_download)
1010 return -ENOTSUPP;
1011
1012 return ndev->ops->fw_download(ndev, firmware_name);
1013 }
1014
1015 static struct nfc_ops nci_nfc_ops = {
1016 .dev_up = nci_dev_up,
1017 .dev_down = nci_dev_down,
1018 .start_poll = nci_start_poll,
1019 .stop_poll = nci_stop_poll,
1020 .dep_link_up = nci_dep_link_up,
1021 .dep_link_down = nci_dep_link_down,
1022 .activate_target = nci_activate_target,
1023 .deactivate_target = nci_deactivate_target,
1024 .im_transceive = nci_transceive,
1025 .tm_send = nci_tm_send,
1026 .enable_se = nci_enable_se,
1027 .disable_se = nci_disable_se,
1028 .discover_se = nci_discover_se,
1029 .se_io = nci_se_io,
1030 .fw_download = nci_fw_download,
1031 };
1032
1033 /* ---- Interface to NCI drivers ---- */
1034 /**
1035 * nci_allocate_device - allocate a new nci device
1036 *
1037 * @ops: device operations
1038 * @supported_protocols: NFC protocols supported by the device
1039 */
1040 struct nci_dev *nci_allocate_device(struct nci_ops *ops,
1041 __u32 supported_protocols,
1042 int tx_headroom, int tx_tailroom)
1043 {
1044 struct nci_dev *ndev;
1045
1046 pr_debug("supported_protocols 0x%x\n", supported_protocols);
1047
1048 if (!ops->open || !ops->close || !ops->send)
1049 return NULL;
1050
1051 if (!supported_protocols)
1052 return NULL;
1053
1054 ndev = kzalloc(sizeof(struct nci_dev), GFP_KERNEL);
1055 if (!ndev)
1056 return NULL;
1057
1058 ndev->ops = ops;
1059
1060 if (ops->n_prop_ops > NCI_MAX_PROPRIETARY_CMD) {
1061 pr_err("Too many proprietary commands: %zd\n",
1062 ops->n_prop_ops);
1063 ops->prop_ops = NULL;
1064 ops->n_prop_ops = 0;
1065 }
1066
1067 ndev->tx_headroom = tx_headroom;
1068 ndev->tx_tailroom = tx_tailroom;
1069 init_completion(&ndev->req_completion);
1070
1071 ndev->nfc_dev = nfc_allocate_device(&nci_nfc_ops,
1072 supported_protocols,
1073 tx_headroom + NCI_DATA_HDR_SIZE,
1074 tx_tailroom);
1075 if (!ndev->nfc_dev)
1076 goto free_nci;
1077
1078 ndev->hci_dev = nci_hci_allocate(ndev);
1079 if (!ndev->hci_dev)
1080 goto free_nfc;
1081
1082 nfc_set_drvdata(ndev->nfc_dev, ndev);
1083
1084 return ndev;
1085
1086 free_nfc:
1087 kfree(ndev->nfc_dev);
1088
1089 free_nci:
1090 kfree(ndev);
1091 return NULL;
1092 }
1093 EXPORT_SYMBOL(nci_allocate_device);
1094
1095 /**
1096 * nci_free_device - deallocate nci device
1097 *
1098 * @ndev: The nci device to deallocate
1099 */
1100 void nci_free_device(struct nci_dev *ndev)
1101 {
1102 nfc_free_device(ndev->nfc_dev);
1103 kfree(ndev);
1104 }
1105 EXPORT_SYMBOL(nci_free_device);
1106
1107 /**
1108 * nci_register_device - register a nci device in the nfc subsystem
1109 *
1110 * @dev: The nci device to register
1111 */
1112 int nci_register_device(struct nci_dev *ndev)
1113 {
1114 int rc;
1115 struct device *dev = &ndev->nfc_dev->dev;
1116 char name[32];
1117
1118 ndev->flags = 0;
1119
1120 INIT_WORK(&ndev->cmd_work, nci_cmd_work);
1121 snprintf(name, sizeof(name), "%s_nci_cmd_wq", dev_name(dev));
1122 ndev->cmd_wq = create_singlethread_workqueue(name);
1123 if (!ndev->cmd_wq) {
1124 rc = -ENOMEM;
1125 goto exit;
1126 }
1127
1128 INIT_WORK(&ndev->rx_work, nci_rx_work);
1129 snprintf(name, sizeof(name), "%s_nci_rx_wq", dev_name(dev));
1130 ndev->rx_wq = create_singlethread_workqueue(name);
1131 if (!ndev->rx_wq) {
1132 rc = -ENOMEM;
1133 goto destroy_cmd_wq_exit;
1134 }
1135
1136 INIT_WORK(&ndev->tx_work, nci_tx_work);
1137 snprintf(name, sizeof(name), "%s_nci_tx_wq", dev_name(dev));
1138 ndev->tx_wq = create_singlethread_workqueue(name);
1139 if (!ndev->tx_wq) {
1140 rc = -ENOMEM;
1141 goto destroy_rx_wq_exit;
1142 }
1143
1144 skb_queue_head_init(&ndev->cmd_q);
1145 skb_queue_head_init(&ndev->rx_q);
1146 skb_queue_head_init(&ndev->tx_q);
1147
1148 setup_timer(&ndev->cmd_timer, nci_cmd_timer,
1149 (unsigned long) ndev);
1150 setup_timer(&ndev->data_timer, nci_data_timer,
1151 (unsigned long) ndev);
1152
1153 mutex_init(&ndev->req_lock);
1154 INIT_LIST_HEAD(&ndev->conn_info_list);
1155
1156 rc = nfc_register_device(ndev->nfc_dev);
1157 if (rc)
1158 goto destroy_rx_wq_exit;
1159
1160 goto exit;
1161
1162 destroy_rx_wq_exit:
1163 destroy_workqueue(ndev->rx_wq);
1164
1165 destroy_cmd_wq_exit:
1166 destroy_workqueue(ndev->cmd_wq);
1167
1168 exit:
1169 return rc;
1170 }
1171 EXPORT_SYMBOL(nci_register_device);
1172
1173 /**
1174 * nci_unregister_device - unregister a nci device in the nfc subsystem
1175 *
1176 * @dev: The nci device to unregister
1177 */
1178 void nci_unregister_device(struct nci_dev *ndev)
1179 {
1180 struct nci_conn_info *conn_info, *n;
1181
1182 nci_close_device(ndev);
1183
1184 destroy_workqueue(ndev->cmd_wq);
1185 destroy_workqueue(ndev->rx_wq);
1186 destroy_workqueue(ndev->tx_wq);
1187
1188 list_for_each_entry_safe(conn_info, n, &ndev->conn_info_list, list) {
1189 list_del(&conn_info->list);
1190 /* conn_info is allocated with devm_kzalloc */
1191 }
1192
1193 nfc_unregister_device(ndev->nfc_dev);
1194 }
1195 EXPORT_SYMBOL(nci_unregister_device);
1196
1197 /**
1198 * nci_recv_frame - receive frame from NCI drivers
1199 *
1200 * @ndev: The nci device
1201 * @skb: The sk_buff to receive
1202 */
1203 int nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb)
1204 {
1205 pr_debug("len %d\n", skb->len);
1206
1207 if (!ndev || (!test_bit(NCI_UP, &ndev->flags) &&
1208 !test_bit(NCI_INIT, &ndev->flags))) {
1209 kfree_skb(skb);
1210 return -ENXIO;
1211 }
1212
1213 /* Queue frame for rx worker thread */
1214 skb_queue_tail(&ndev->rx_q, skb);
1215 queue_work(ndev->rx_wq, &ndev->rx_work);
1216
1217 return 0;
1218 }
1219 EXPORT_SYMBOL(nci_recv_frame);
1220
1221 int nci_send_frame(struct nci_dev *ndev, struct sk_buff *skb)
1222 {
1223 pr_debug("len %d\n", skb->len);
1224
1225 if (!ndev) {
1226 kfree_skb(skb);
1227 return -ENODEV;
1228 }
1229
1230 /* Get rid of skb owner, prior to sending to the driver. */
1231 skb_orphan(skb);
1232
1233 /* Send copy to sniffer */
1234 nfc_send_to_raw_sock(ndev->nfc_dev, skb,
1235 RAW_PAYLOAD_NCI, NFC_DIRECTION_TX);
1236
1237 return ndev->ops->send(ndev, skb);
1238 }
1239 EXPORT_SYMBOL(nci_send_frame);
1240
1241 /* Send NCI command */
1242 int nci_send_cmd(struct nci_dev *ndev, __u16 opcode, __u8 plen, void *payload)
1243 {
1244 struct nci_ctrl_hdr *hdr;
1245 struct sk_buff *skb;
1246
1247 pr_debug("opcode 0x%x, plen %d\n", opcode, plen);
1248
1249 skb = nci_skb_alloc(ndev, (NCI_CTRL_HDR_SIZE + plen), GFP_KERNEL);
1250 if (!skb) {
1251 pr_err("no memory for command\n");
1252 return -ENOMEM;
1253 }
1254
1255 hdr = (struct nci_ctrl_hdr *) skb_put(skb, NCI_CTRL_HDR_SIZE);
1256 hdr->gid = nci_opcode_gid(opcode);
1257 hdr->oid = nci_opcode_oid(opcode);
1258 hdr->plen = plen;
1259
1260 nci_mt_set((__u8 *)hdr, NCI_MT_CMD_PKT);
1261 nci_pbf_set((__u8 *)hdr, NCI_PBF_LAST);
1262
1263 if (plen)
1264 memcpy(skb_put(skb, plen), payload, plen);
1265
1266 skb_queue_tail(&ndev->cmd_q, skb);
1267 queue_work(ndev->cmd_wq, &ndev->cmd_work);
1268
1269 return 0;
1270 }
1271 EXPORT_SYMBOL(nci_send_cmd);
1272
1273 /* Proprietary commands API */
1274 static struct nci_driver_ops *ops_cmd_lookup(struct nci_driver_ops *ops,
1275 size_t n_ops,
1276 __u16 opcode)
1277 {
1278 size_t i;
1279 struct nci_driver_ops *op;
1280
1281 if (!ops || !n_ops)
1282 return NULL;
1283
1284 for (i = 0; i < n_ops; i++) {
1285 op = &ops[i];
1286 if (op->opcode == opcode)
1287 return op;
1288 }
1289
1290 return NULL;
1291 }
1292
1293 static int nci_op_rsp_packet(struct nci_dev *ndev, __u16 rsp_opcode,
1294 struct sk_buff *skb, struct nci_driver_ops *ops,
1295 size_t n_ops)
1296 {
1297 struct nci_driver_ops *op;
1298
1299 op = ops_cmd_lookup(ops, n_ops, rsp_opcode);
1300 if (!op || !op->rsp)
1301 return -ENOTSUPP;
1302
1303 return op->rsp(ndev, skb);
1304 }
1305
1306 static int nci_op_ntf_packet(struct nci_dev *ndev, __u16 ntf_opcode,
1307 struct sk_buff *skb, struct nci_driver_ops *ops,
1308 size_t n_ops)
1309 {
1310 struct nci_driver_ops *op;
1311
1312 op = ops_cmd_lookup(ops, n_ops, ntf_opcode);
1313 if (!op || !op->ntf)
1314 return -ENOTSUPP;
1315
1316 return op->ntf(ndev, skb);
1317 }
1318
1319 int nci_prop_rsp_packet(struct nci_dev *ndev, __u16 opcode,
1320 struct sk_buff *skb)
1321 {
1322 return nci_op_rsp_packet(ndev, opcode, skb, ndev->ops->prop_ops,
1323 ndev->ops->n_prop_ops);
1324 }
1325
1326 int nci_prop_ntf_packet(struct nci_dev *ndev, __u16 opcode,
1327 struct sk_buff *skb)
1328 {
1329 return nci_op_ntf_packet(ndev, opcode, skb, ndev->ops->prop_ops,
1330 ndev->ops->n_prop_ops);
1331 }
1332
1333 int nci_core_rsp_packet(struct nci_dev *ndev, __u16 opcode,
1334 struct sk_buff *skb)
1335 {
1336 return nci_op_rsp_packet(ndev, opcode, skb, ndev->ops->core_ops,
1337 ndev->ops->n_core_ops);
1338 }
1339
1340 int nci_core_ntf_packet(struct nci_dev *ndev, __u16 opcode,
1341 struct sk_buff *skb)
1342 {
1343 return nci_op_ntf_packet(ndev, opcode, skb, ndev->ops->core_ops,
1344 ndev->ops->n_core_ops);
1345 }
1346
1347 /* ---- NCI TX Data worker thread ---- */
1348
1349 static void nci_tx_work(struct work_struct *work)
1350 {
1351 struct nci_dev *ndev = container_of(work, struct nci_dev, tx_work);
1352 struct nci_conn_info *conn_info;
1353 struct sk_buff *skb;
1354
1355 conn_info = nci_get_conn_info_by_conn_id(ndev, ndev->cur_conn_id);
1356 if (!conn_info)
1357 return;
1358
1359 pr_debug("credits_cnt %d\n", atomic_read(&conn_info->credits_cnt));
1360
1361 /* Send queued tx data */
1362 while (atomic_read(&conn_info->credits_cnt)) {
1363 skb = skb_dequeue(&ndev->tx_q);
1364 if (!skb)
1365 return;
1366
1367 /* Check if data flow control is used */
1368 if (atomic_read(&conn_info->credits_cnt) !=
1369 NCI_DATA_FLOW_CONTROL_NOT_USED)
1370 atomic_dec(&conn_info->credits_cnt);
1371
1372 pr_debug("NCI TX: MT=data, PBF=%d, conn_id=%d, plen=%d\n",
1373 nci_pbf(skb->data),
1374 nci_conn_id(skb->data),
1375 nci_plen(skb->data));
1376
1377 nci_send_frame(ndev, skb);
1378
1379 mod_timer(&ndev->data_timer,
1380 jiffies + msecs_to_jiffies(NCI_DATA_TIMEOUT));
1381 }
1382 }
1383
1384 /* ----- NCI RX worker thread (data & control) ----- */
1385
1386 static void nci_rx_work(struct work_struct *work)
1387 {
1388 struct nci_dev *ndev = container_of(work, struct nci_dev, rx_work);
1389 struct sk_buff *skb;
1390
1391 while ((skb = skb_dequeue(&ndev->rx_q))) {
1392
1393 /* Send copy to sniffer */
1394 nfc_send_to_raw_sock(ndev->nfc_dev, skb,
1395 RAW_PAYLOAD_NCI, NFC_DIRECTION_RX);
1396
1397 /* Process frame */
1398 switch (nci_mt(skb->data)) {
1399 case NCI_MT_RSP_PKT:
1400 nci_rsp_packet(ndev, skb);
1401 break;
1402
1403 case NCI_MT_NTF_PKT:
1404 nci_ntf_packet(ndev, skb);
1405 break;
1406
1407 case NCI_MT_DATA_PKT:
1408 nci_rx_data_packet(ndev, skb);
1409 break;
1410
1411 default:
1412 pr_err("unknown MT 0x%x\n", nci_mt(skb->data));
1413 kfree_skb(skb);
1414 break;
1415 }
1416 }
1417
1418 /* check if a data exchange timout has occurred */
1419 if (test_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags)) {
1420 /* complete the data exchange transaction, if exists */
1421 if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags))
1422 nci_data_exchange_complete(ndev, NULL,
1423 ndev->cur_conn_id,
1424 -ETIMEDOUT);
1425
1426 clear_bit(NCI_DATA_EXCHANGE_TO, &ndev->flags);
1427 }
1428 }
1429
1430 /* ----- NCI TX CMD worker thread ----- */
1431
1432 static void nci_cmd_work(struct work_struct *work)
1433 {
1434 struct nci_dev *ndev = container_of(work, struct nci_dev, cmd_work);
1435 struct sk_buff *skb;
1436
1437 pr_debug("cmd_cnt %d\n", atomic_read(&ndev->cmd_cnt));
1438
1439 /* Send queued command */
1440 if (atomic_read(&ndev->cmd_cnt)) {
1441 skb = skb_dequeue(&ndev->cmd_q);
1442 if (!skb)
1443 return;
1444
1445 atomic_dec(&ndev->cmd_cnt);
1446
1447 pr_debug("NCI TX: MT=cmd, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n",
1448 nci_pbf(skb->data),
1449 nci_opcode_gid(nci_opcode(skb->data)),
1450 nci_opcode_oid(nci_opcode(skb->data)),
1451 nci_plen(skb->data));
1452
1453 nci_send_frame(ndev, skb);
1454
1455 mod_timer(&ndev->cmd_timer,
1456 jiffies + msecs_to_jiffies(NCI_CMD_TIMEOUT));
1457 }
1458 }
1459
1460 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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