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