Commit | Line | Data |
---|---|---|
3e256b8f LRV |
1 | /* |
2 | * Copyright (C) 2011 Instituto Nokia de Tecnologia | |
3 | * | |
4 | * Authors: | |
5 | * Lauro Ramos Venancio <lauro.venancio@openbossa.org> | |
6 | * Aloisio Almeida Jr <aloisio.almeida@openbossa.org> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the | |
20 | * Free Software Foundation, Inc., | |
21 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
22 | */ | |
23 | ||
52858b51 | 24 | #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__ |
ed1e0ad8 | 25 | |
3e256b8f LRV |
26 | #include <linux/init.h> |
27 | #include <linux/kernel.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/slab.h> | |
be055b2f | 30 | #include <linux/rfkill.h> |
7c7cd3bf | 31 | #include <linux/nfc.h> |
3e256b8f | 32 | |
5df16cad SO |
33 | #include <net/genetlink.h> |
34 | ||
3e256b8f LRV |
35 | #include "nfc.h" |
36 | ||
37 | #define VERSION "0.1" | |
38 | ||
c8d56ae7 EL |
39 | #define NFC_CHECK_PRES_FREQ_MS 2000 |
40 | ||
3e256b8f LRV |
41 | int nfc_devlist_generation; |
42 | DEFINE_MUTEX(nfc_devlist_mutex); | |
43 | ||
7eda8b8e SO |
44 | /* NFC device ID bitmap */ |
45 | static DEFINE_IDA(nfc_index_ida); | |
46 | ||
9ea7187c | 47 | int nfc_fw_download(struct nfc_dev *dev, const char *firmware_name) |
9674da87 EL |
48 | { |
49 | int rc = 0; | |
50 | ||
51 | pr_debug("%s do firmware %s\n", dev_name(&dev->dev), firmware_name); | |
52 | ||
53 | device_lock(&dev->dev); | |
54 | ||
55 | if (!device_is_registered(&dev->dev)) { | |
56 | rc = -ENODEV; | |
57 | goto error; | |
58 | } | |
59 | ||
60 | if (dev->dev_up) { | |
61 | rc = -EBUSY; | |
62 | goto error; | |
63 | } | |
64 | ||
9ea7187c | 65 | if (!dev->ops->fw_download) { |
9674da87 EL |
66 | rc = -EOPNOTSUPP; |
67 | goto error; | |
68 | } | |
69 | ||
9ea7187c SO |
70 | dev->fw_download_in_progress = true; |
71 | rc = dev->ops->fw_download(dev, firmware_name); | |
9674da87 | 72 | if (rc) |
9ea7187c | 73 | dev->fw_download_in_progress = false; |
9674da87 EL |
74 | |
75 | error: | |
76 | device_unlock(&dev->dev); | |
77 | return rc; | |
78 | } | |
79 | ||
352a5f5f EL |
80 | /** |
81 | * nfc_fw_download_done - inform that a firmware download was completed | |
82 | * | |
83 | * @dev: The nfc device to which firmware was downloaded | |
84 | * @firmware_name: The firmware filename | |
85 | * @result: The positive value of a standard errno value | |
86 | */ | |
87 | int nfc_fw_download_done(struct nfc_dev *dev, const char *firmware_name, | |
88 | u32 result) | |
9674da87 | 89 | { |
9ea7187c | 90 | dev->fw_download_in_progress = false; |
9674da87 | 91 | |
352a5f5f | 92 | return nfc_genl_fw_download_done(dev, firmware_name, result); |
9674da87 | 93 | } |
9ea7187c | 94 | EXPORT_SYMBOL(nfc_fw_download_done); |
9674da87 | 95 | |
8b3fe7b5 IE |
96 | /** |
97 | * nfc_dev_up - turn on the NFC device | |
98 | * | |
99 | * @dev: The nfc device to be turned on | |
100 | * | |
101 | * The device remains up until the nfc_dev_down function is called. | |
102 | */ | |
103 | int nfc_dev_up(struct nfc_dev *dev) | |
104 | { | |
105 | int rc = 0; | |
106 | ||
20c239c1 | 107 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
8b3fe7b5 IE |
108 | |
109 | device_lock(&dev->dev); | |
110 | ||
be055b2f SO |
111 | if (dev->rfkill && rfkill_blocked(dev->rfkill)) { |
112 | rc = -ERFKILL; | |
113 | goto error; | |
114 | } | |
115 | ||
8b3fe7b5 IE |
116 | if (!device_is_registered(&dev->dev)) { |
117 | rc = -ENODEV; | |
118 | goto error; | |
119 | } | |
120 | ||
9ea7187c | 121 | if (dev->fw_download_in_progress) { |
9674da87 EL |
122 | rc = -EBUSY; |
123 | goto error; | |
124 | } | |
125 | ||
8b3fe7b5 IE |
126 | if (dev->dev_up) { |
127 | rc = -EALREADY; | |
128 | goto error; | |
129 | } | |
130 | ||
131 | if (dev->ops->dev_up) | |
132 | rc = dev->ops->dev_up(dev); | |
133 | ||
134 | if (!rc) | |
135 | dev->dev_up = true; | |
136 | ||
0a946301 SO |
137 | /* We have to enable the device before discovering SEs */ |
138 | if (dev->ops->discover_se) { | |
139 | rc = dev->ops->discover_se(dev); | |
369f4d50 | 140 | if (rc) |
0a946301 SO |
141 | pr_warn("SE discovery failed\n"); |
142 | } | |
143 | ||
8b3fe7b5 IE |
144 | error: |
145 | device_unlock(&dev->dev); | |
146 | return rc; | |
147 | } | |
148 | ||
149 | /** | |
150 | * nfc_dev_down - turn off the NFC device | |
151 | * | |
152 | * @dev: The nfc device to be turned off | |
153 | */ | |
154 | int nfc_dev_down(struct nfc_dev *dev) | |
155 | { | |
156 | int rc = 0; | |
157 | ||
20c239c1 | 158 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
8b3fe7b5 IE |
159 | |
160 | device_lock(&dev->dev); | |
161 | ||
162 | if (!device_is_registered(&dev->dev)) { | |
163 | rc = -ENODEV; | |
164 | goto error; | |
165 | } | |
166 | ||
167 | if (!dev->dev_up) { | |
168 | rc = -EALREADY; | |
169 | goto error; | |
170 | } | |
171 | ||
90099433 | 172 | if (dev->polling || dev->active_target) { |
8b3fe7b5 IE |
173 | rc = -EBUSY; |
174 | goto error; | |
175 | } | |
176 | ||
177 | if (dev->ops->dev_down) | |
178 | dev->ops->dev_down(dev); | |
179 | ||
180 | dev->dev_up = false; | |
181 | ||
182 | error: | |
183 | device_unlock(&dev->dev); | |
184 | return rc; | |
185 | } | |
186 | ||
be055b2f SO |
187 | static int nfc_rfkill_set_block(void *data, bool blocked) |
188 | { | |
189 | struct nfc_dev *dev = data; | |
190 | ||
191 | pr_debug("%s blocked %d", dev_name(&dev->dev), blocked); | |
192 | ||
193 | if (!blocked) | |
194 | return 0; | |
195 | ||
196 | nfc_dev_down(dev); | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
201 | static const struct rfkill_ops nfc_rfkill_ops = { | |
202 | .set_block = nfc_rfkill_set_block, | |
203 | }; | |
204 | ||
3e256b8f LRV |
205 | /** |
206 | * nfc_start_poll - start polling for nfc targets | |
207 | * | |
208 | * @dev: The nfc device that must start polling | |
209 | * @protocols: bitset of nfc protocols that must be used for polling | |
210 | * | |
211 | * The device remains polling for targets until a target is found or | |
212 | * the nfc_stop_poll function is called. | |
213 | */ | |
fe7c5800 | 214 | int nfc_start_poll(struct nfc_dev *dev, u32 im_protocols, u32 tm_protocols) |
3e256b8f LRV |
215 | { |
216 | int rc; | |
217 | ||
fe7c5800 SO |
218 | pr_debug("dev_name %s initiator protocols 0x%x target protocols 0x%x\n", |
219 | dev_name(&dev->dev), im_protocols, tm_protocols); | |
3e256b8f | 220 | |
fe7c5800 | 221 | if (!im_protocols && !tm_protocols) |
3e256b8f LRV |
222 | return -EINVAL; |
223 | ||
224 | device_lock(&dev->dev); | |
225 | ||
226 | if (!device_is_registered(&dev->dev)) { | |
227 | rc = -ENODEV; | |
228 | goto error; | |
229 | } | |
230 | ||
7757dc8a SO |
231 | if (!dev->dev_up) { |
232 | rc = -ENODEV; | |
233 | goto error; | |
234 | } | |
235 | ||
3e256b8f LRV |
236 | if (dev->polling) { |
237 | rc = -EBUSY; | |
238 | goto error; | |
239 | } | |
240 | ||
fe7c5800 | 241 | rc = dev->ops->start_poll(dev, im_protocols, tm_protocols); |
f212ad5e | 242 | if (!rc) { |
3e256b8f | 243 | dev->polling = true; |
f212ad5e SO |
244 | dev->rf_mode = NFC_RF_NONE; |
245 | } | |
3e256b8f LRV |
246 | |
247 | error: | |
248 | device_unlock(&dev->dev); | |
249 | return rc; | |
250 | } | |
251 | ||
252 | /** | |
253 | * nfc_stop_poll - stop polling for nfc targets | |
254 | * | |
255 | * @dev: The nfc device that must stop polling | |
256 | */ | |
257 | int nfc_stop_poll(struct nfc_dev *dev) | |
258 | { | |
259 | int rc = 0; | |
260 | ||
20c239c1 | 261 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
3e256b8f LRV |
262 | |
263 | device_lock(&dev->dev); | |
264 | ||
265 | if (!device_is_registered(&dev->dev)) { | |
266 | rc = -ENODEV; | |
267 | goto error; | |
268 | } | |
269 | ||
270 | if (!dev->polling) { | |
271 | rc = -EINVAL; | |
272 | goto error; | |
273 | } | |
274 | ||
275 | dev->ops->stop_poll(dev); | |
276 | dev->polling = false; | |
5bcf099c | 277 | dev->rf_mode = NFC_RF_NONE; |
3e256b8f LRV |
278 | |
279 | error: | |
280 | device_unlock(&dev->dev); | |
281 | return rc; | |
282 | } | |
283 | ||
90099433 EL |
284 | static struct nfc_target *nfc_find_target(struct nfc_dev *dev, u32 target_idx) |
285 | { | |
286 | int i; | |
287 | ||
288 | if (dev->n_targets == 0) | |
289 | return NULL; | |
290 | ||
0f450772 | 291 | for (i = 0; i < dev->n_targets; i++) { |
90099433 EL |
292 | if (dev->targets[i].idx == target_idx) |
293 | return &dev->targets[i]; | |
294 | } | |
295 | ||
296 | return NULL; | |
297 | } | |
298 | ||
47807d3d | 299 | int nfc_dep_link_up(struct nfc_dev *dev, int target_index, u8 comm_mode) |
1ed28f61 SO |
300 | { |
301 | int rc = 0; | |
47807d3d SO |
302 | u8 *gb; |
303 | size_t gb_len; | |
90099433 | 304 | struct nfc_target *target; |
1ed28f61 | 305 | |
47807d3d | 306 | pr_debug("dev_name=%s comm %d\n", dev_name(&dev->dev), comm_mode); |
1ed28f61 SO |
307 | |
308 | if (!dev->ops->dep_link_up) | |
309 | return -EOPNOTSUPP; | |
310 | ||
311 | device_lock(&dev->dev); | |
312 | ||
313 | if (!device_is_registered(&dev->dev)) { | |
314 | rc = -ENODEV; | |
315 | goto error; | |
316 | } | |
317 | ||
318 | if (dev->dep_link_up == true) { | |
319 | rc = -EALREADY; | |
320 | goto error; | |
321 | } | |
322 | ||
47807d3d SO |
323 | gb = nfc_llcp_general_bytes(dev, &gb_len); |
324 | if (gb_len > NFC_MAX_GT_LEN) { | |
325 | rc = -EINVAL; | |
326 | goto error; | |
327 | } | |
328 | ||
90099433 EL |
329 | target = nfc_find_target(dev, target_index); |
330 | if (target == NULL) { | |
331 | rc = -ENOTCONN; | |
332 | goto error; | |
333 | } | |
334 | ||
335 | rc = dev->ops->dep_link_up(dev, target, comm_mode, gb, gb_len); | |
f212ad5e | 336 | if (!rc) { |
90099433 | 337 | dev->active_target = target; |
f212ad5e SO |
338 | dev->rf_mode = NFC_RF_INITIATOR; |
339 | } | |
1ed28f61 SO |
340 | |
341 | error: | |
342 | device_unlock(&dev->dev); | |
343 | return rc; | |
344 | } | |
345 | ||
346 | int nfc_dep_link_down(struct nfc_dev *dev) | |
347 | { | |
348 | int rc = 0; | |
349 | ||
350 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); | |
351 | ||
352 | if (!dev->ops->dep_link_down) | |
353 | return -EOPNOTSUPP; | |
354 | ||
355 | device_lock(&dev->dev); | |
356 | ||
357 | if (!device_is_registered(&dev->dev)) { | |
358 | rc = -ENODEV; | |
359 | goto error; | |
360 | } | |
361 | ||
362 | if (dev->dep_link_up == false) { | |
363 | rc = -EALREADY; | |
364 | goto error; | |
365 | } | |
366 | ||
1ed28f61 SO |
367 | rc = dev->ops->dep_link_down(dev); |
368 | if (!rc) { | |
369 | dev->dep_link_up = false; | |
90099433 | 370 | dev->active_target = NULL; |
5bcf099c | 371 | dev->rf_mode = NFC_RF_NONE; |
d646960f | 372 | nfc_llcp_mac_is_down(dev); |
1ed28f61 SO |
373 | nfc_genl_dep_link_down_event(dev); |
374 | } | |
375 | ||
376 | error: | |
377 | device_unlock(&dev->dev); | |
5bcf099c | 378 | |
1ed28f61 SO |
379 | return rc; |
380 | } | |
381 | ||
382 | int nfc_dep_link_is_up(struct nfc_dev *dev, u32 target_idx, | |
0a40acb2 | 383 | u8 comm_mode, u8 rf_mode) |
1ed28f61 SO |
384 | { |
385 | dev->dep_link_up = true; | |
1ed28f61 | 386 | |
e29a9e2a SO |
387 | if (!dev->active_target) { |
388 | struct nfc_target *target; | |
389 | ||
390 | target = nfc_find_target(dev, target_idx); | |
391 | if (target == NULL) | |
392 | return -ENOTCONN; | |
393 | ||
394 | dev->active_target = target; | |
395 | } | |
396 | ||
397 | dev->polling = false; | |
398 | dev->rf_mode = rf_mode; | |
399 | ||
d646960f SO |
400 | nfc_llcp_mac_is_up(dev, target_idx, comm_mode, rf_mode); |
401 | ||
1ed28f61 SO |
402 | return nfc_genl_dep_link_up_event(dev, target_idx, comm_mode, rf_mode); |
403 | } | |
404 | EXPORT_SYMBOL(nfc_dep_link_is_up); | |
405 | ||
3e256b8f LRV |
406 | /** |
407 | * nfc_activate_target - prepare the target for data exchange | |
408 | * | |
409 | * @dev: The nfc device that found the target | |
410 | * @target_idx: index of the target that must be activated | |
411 | * @protocol: nfc protocol that will be used for data exchange | |
412 | */ | |
413 | int nfc_activate_target(struct nfc_dev *dev, u32 target_idx, u32 protocol) | |
414 | { | |
415 | int rc; | |
90099433 | 416 | struct nfc_target *target; |
3e256b8f | 417 | |
20c239c1 JP |
418 | pr_debug("dev_name=%s target_idx=%u protocol=%u\n", |
419 | dev_name(&dev->dev), target_idx, protocol); | |
3e256b8f LRV |
420 | |
421 | device_lock(&dev->dev); | |
422 | ||
423 | if (!device_is_registered(&dev->dev)) { | |
424 | rc = -ENODEV; | |
425 | goto error; | |
426 | } | |
427 | ||
90099433 EL |
428 | if (dev->active_target) { |
429 | rc = -EBUSY; | |
430 | goto error; | |
431 | } | |
432 | ||
433 | target = nfc_find_target(dev, target_idx); | |
434 | if (target == NULL) { | |
435 | rc = -ENOTCONN; | |
436 | goto error; | |
437 | } | |
438 | ||
439 | rc = dev->ops->activate_target(dev, target, protocol); | |
c8d56ae7 | 440 | if (!rc) { |
90099433 | 441 | dev->active_target = target; |
f212ad5e | 442 | dev->rf_mode = NFC_RF_INITIATOR; |
3e256b8f | 443 | |
f0c91038 | 444 | if (dev->ops->check_presence && !dev->shutting_down) |
c8d56ae7 EL |
445 | mod_timer(&dev->check_pres_timer, jiffies + |
446 | msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS)); | |
447 | } | |
3e256b8f LRV |
448 | |
449 | error: | |
450 | device_unlock(&dev->dev); | |
451 | return rc; | |
452 | } | |
453 | ||
454 | /** | |
455 | * nfc_deactivate_target - deactivate a nfc target | |
456 | * | |
457 | * @dev: The nfc device that found the target | |
458 | * @target_idx: index of the target that must be deactivated | |
459 | */ | |
460 | int nfc_deactivate_target(struct nfc_dev *dev, u32 target_idx) | |
461 | { | |
462 | int rc = 0; | |
463 | ||
20c239c1 JP |
464 | pr_debug("dev_name=%s target_idx=%u\n", |
465 | dev_name(&dev->dev), target_idx); | |
3e256b8f LRV |
466 | |
467 | device_lock(&dev->dev); | |
468 | ||
469 | if (!device_is_registered(&dev->dev)) { | |
470 | rc = -ENODEV; | |
471 | goto error; | |
472 | } | |
473 | ||
90099433 EL |
474 | if (dev->active_target == NULL) { |
475 | rc = -ENOTCONN; | |
476 | goto error; | |
477 | } | |
478 | ||
479 | if (dev->active_target->idx != target_idx) { | |
480 | rc = -ENOTCONN; | |
481 | goto error; | |
482 | } | |
483 | ||
c8d56ae7 EL |
484 | if (dev->ops->check_presence) |
485 | del_timer_sync(&dev->check_pres_timer); | |
486 | ||
90099433 EL |
487 | dev->ops->deactivate_target(dev, dev->active_target); |
488 | dev->active_target = NULL; | |
3e256b8f LRV |
489 | |
490 | error: | |
491 | device_unlock(&dev->dev); | |
492 | return rc; | |
493 | } | |
494 | ||
495 | /** | |
496 | * nfc_data_exchange - transceive data | |
497 | * | |
498 | * @dev: The nfc device that found the target | |
499 | * @target_idx: index of the target | |
500 | * @skb: data to be sent | |
501 | * @cb: callback called when the response is received | |
502 | * @cb_context: parameter for the callback function | |
503 | * | |
504 | * The user must wait for the callback before calling this function again. | |
505 | */ | |
0a40acb2 SO |
506 | int nfc_data_exchange(struct nfc_dev *dev, u32 target_idx, struct sk_buff *skb, |
507 | data_exchange_cb_t cb, void *cb_context) | |
3e256b8f LRV |
508 | { |
509 | int rc; | |
510 | ||
20c239c1 JP |
511 | pr_debug("dev_name=%s target_idx=%u skb->len=%u\n", |
512 | dev_name(&dev->dev), target_idx, skb->len); | |
3e256b8f LRV |
513 | |
514 | device_lock(&dev->dev); | |
515 | ||
516 | if (!device_is_registered(&dev->dev)) { | |
517 | rc = -ENODEV; | |
518 | kfree_skb(skb); | |
519 | goto error; | |
520 | } | |
521 | ||
be9ae4ce SO |
522 | if (dev->rf_mode == NFC_RF_INITIATOR && dev->active_target != NULL) { |
523 | if (dev->active_target->idx != target_idx) { | |
524 | rc = -EADDRNOTAVAIL; | |
525 | kfree_skb(skb); | |
526 | goto error; | |
527 | } | |
144612ca | 528 | |
be9ae4ce SO |
529 | if (dev->ops->check_presence) |
530 | del_timer_sync(&dev->check_pres_timer); | |
531 | ||
532 | rc = dev->ops->im_transceive(dev, dev->active_target, skb, cb, | |
533 | cb_context); | |
534 | ||
f0c91038 | 535 | if (!rc && dev->ops->check_presence && !dev->shutting_down) |
be9ae4ce SO |
536 | mod_timer(&dev->check_pres_timer, jiffies + |
537 | msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS)); | |
538 | } else if (dev->rf_mode == NFC_RF_TARGET && dev->ops->tm_send != NULL) { | |
539 | rc = dev->ops->tm_send(dev, skb); | |
540 | } else { | |
541 | rc = -ENOTCONN; | |
144612ca EL |
542 | kfree_skb(skb); |
543 | goto error; | |
544 | } | |
545 | ||
c8d56ae7 | 546 | |
3e256b8f LRV |
547 | error: |
548 | device_unlock(&dev->dev); | |
549 | return rc; | |
550 | } | |
551 | ||
d8eb18ee | 552 | struct nfc_se *nfc_find_se(struct nfc_dev *dev, u32 se_idx) |
c531c9ec SO |
553 | { |
554 | struct nfc_se *se, *n; | |
555 | ||
556 | list_for_each_entry_safe(se, n, &dev->secure_elements, list) | |
557 | if (se->idx == se_idx) | |
558 | return se; | |
559 | ||
560 | return NULL; | |
561 | } | |
d8eb18ee | 562 | EXPORT_SYMBOL(nfc_find_se); |
c531c9ec SO |
563 | |
564 | int nfc_enable_se(struct nfc_dev *dev, u32 se_idx) | |
565 | { | |
566 | ||
567 | struct nfc_se *se; | |
568 | int rc; | |
569 | ||
570 | pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); | |
571 | ||
572 | device_lock(&dev->dev); | |
573 | ||
574 | if (!device_is_registered(&dev->dev)) { | |
575 | rc = -ENODEV; | |
576 | goto error; | |
577 | } | |
578 | ||
579 | if (!dev->dev_up) { | |
580 | rc = -ENODEV; | |
581 | goto error; | |
582 | } | |
583 | ||
584 | if (dev->polling) { | |
585 | rc = -EBUSY; | |
586 | goto error; | |
587 | } | |
588 | ||
589 | if (!dev->ops->enable_se || !dev->ops->disable_se) { | |
590 | rc = -EOPNOTSUPP; | |
591 | goto error; | |
592 | } | |
593 | ||
d8eb18ee | 594 | se = nfc_find_se(dev, se_idx); |
c531c9ec SO |
595 | if (!se) { |
596 | rc = -EINVAL; | |
597 | goto error; | |
598 | } | |
599 | ||
2c383283 | 600 | if (se->state == NFC_SE_ENABLED) { |
c531c9ec SO |
601 | rc = -EALREADY; |
602 | goto error; | |
603 | } | |
604 | ||
605 | rc = dev->ops->enable_se(dev, se_idx); | |
39525ee1 AW |
606 | if (rc >= 0) |
607 | se->state = NFC_SE_ENABLED; | |
c531c9ec SO |
608 | |
609 | error: | |
610 | device_unlock(&dev->dev); | |
611 | return rc; | |
612 | } | |
613 | ||
614 | int nfc_disable_se(struct nfc_dev *dev, u32 se_idx) | |
615 | { | |
616 | ||
617 | struct nfc_se *se; | |
618 | int rc; | |
619 | ||
620 | pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); | |
621 | ||
622 | device_lock(&dev->dev); | |
623 | ||
624 | if (!device_is_registered(&dev->dev)) { | |
625 | rc = -ENODEV; | |
626 | goto error; | |
627 | } | |
628 | ||
629 | if (!dev->dev_up) { | |
630 | rc = -ENODEV; | |
631 | goto error; | |
632 | } | |
633 | ||
634 | if (!dev->ops->enable_se || !dev->ops->disable_se) { | |
635 | rc = -EOPNOTSUPP; | |
636 | goto error; | |
637 | } | |
638 | ||
d8eb18ee | 639 | se = nfc_find_se(dev, se_idx); |
c531c9ec SO |
640 | if (!se) { |
641 | rc = -EINVAL; | |
642 | goto error; | |
643 | } | |
644 | ||
2c383283 | 645 | if (se->state == NFC_SE_DISABLED) { |
c531c9ec SO |
646 | rc = -EALREADY; |
647 | goto error; | |
648 | } | |
649 | ||
650 | rc = dev->ops->disable_se(dev, se_idx); | |
39525ee1 AW |
651 | if (rc >= 0) |
652 | se->state = NFC_SE_DISABLED; | |
c531c9ec SO |
653 | |
654 | error: | |
655 | device_unlock(&dev->dev); | |
656 | return rc; | |
657 | } | |
658 | ||
541d920b SO |
659 | int nfc_set_remote_general_bytes(struct nfc_dev *dev, u8 *gb, u8 gb_len) |
660 | { | |
0a40acb2 | 661 | pr_debug("dev_name=%s gb_len=%d\n", dev_name(&dev->dev), gb_len); |
541d920b SO |
662 | |
663 | if (gb_len > NFC_MAX_GT_LEN) | |
664 | return -EINVAL; | |
665 | ||
d646960f | 666 | return nfc_llcp_set_remote_gb(dev, gb, gb_len); |
541d920b SO |
667 | } |
668 | EXPORT_SYMBOL(nfc_set_remote_general_bytes); | |
669 | ||
ab73b751 SO |
670 | u8 *nfc_get_local_general_bytes(struct nfc_dev *dev, size_t *gb_len) |
671 | { | |
672 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); | |
673 | ||
674 | return nfc_llcp_general_bytes(dev, gb_len); | |
675 | } | |
676 | EXPORT_SYMBOL(nfc_get_local_general_bytes); | |
677 | ||
73167ced SO |
678 | int nfc_tm_data_received(struct nfc_dev *dev, struct sk_buff *skb) |
679 | { | |
680 | /* Only LLCP target mode for now */ | |
681 | if (dev->dep_link_up == false) { | |
682 | kfree_skb(skb); | |
683 | return -ENOLINK; | |
684 | } | |
685 | ||
686 | return nfc_llcp_data_received(dev, skb); | |
687 | } | |
688 | EXPORT_SYMBOL(nfc_tm_data_received); | |
689 | ||
fc40a8c1 SO |
690 | int nfc_tm_activated(struct nfc_dev *dev, u32 protocol, u8 comm_mode, |
691 | u8 *gb, size_t gb_len) | |
692 | { | |
693 | int rc; | |
694 | ||
695 | device_lock(&dev->dev); | |
696 | ||
697 | dev->polling = false; | |
698 | ||
699 | if (gb != NULL) { | |
700 | rc = nfc_set_remote_general_bytes(dev, gb, gb_len); | |
701 | if (rc < 0) | |
702 | goto out; | |
703 | } | |
704 | ||
f212ad5e SO |
705 | dev->rf_mode = NFC_RF_TARGET; |
706 | ||
fc40a8c1 SO |
707 | if (protocol == NFC_PROTO_NFC_DEP_MASK) |
708 | nfc_dep_link_is_up(dev, 0, comm_mode, NFC_RF_TARGET); | |
709 | ||
710 | rc = nfc_genl_tm_activated(dev, protocol); | |
711 | ||
712 | out: | |
713 | device_unlock(&dev->dev); | |
714 | ||
715 | return rc; | |
716 | } | |
717 | EXPORT_SYMBOL(nfc_tm_activated); | |
718 | ||
719 | int nfc_tm_deactivated(struct nfc_dev *dev) | |
720 | { | |
721 | dev->dep_link_up = false; | |
5bcf099c | 722 | dev->rf_mode = NFC_RF_NONE; |
fc40a8c1 SO |
723 | |
724 | return nfc_genl_tm_deactivated(dev); | |
725 | } | |
726 | EXPORT_SYMBOL(nfc_tm_deactivated); | |
727 | ||
3e256b8f | 728 | /** |
7c7cd3bf | 729 | * nfc_alloc_send_skb - allocate a skb for data exchange responses |
3e256b8f LRV |
730 | * |
731 | * @size: size to allocate | |
732 | * @gfp: gfp flags | |
733 | */ | |
7c7cd3bf | 734 | struct sk_buff *nfc_alloc_send_skb(struct nfc_dev *dev, struct sock *sk, |
0a40acb2 SO |
735 | unsigned int flags, unsigned int size, |
736 | unsigned int *err) | |
7c7cd3bf SO |
737 | { |
738 | struct sk_buff *skb; | |
739 | unsigned int total_size; | |
740 | ||
741 | total_size = size + | |
742 | dev->tx_headroom + dev->tx_tailroom + NFC_HEADER_SIZE; | |
743 | ||
744 | skb = sock_alloc_send_skb(sk, total_size, flags & MSG_DONTWAIT, err); | |
745 | if (skb) | |
746 | skb_reserve(skb, dev->tx_headroom + NFC_HEADER_SIZE); | |
747 | ||
748 | return skb; | |
749 | } | |
750 | ||
751 | /** | |
752 | * nfc_alloc_recv_skb - allocate a skb for data exchange responses | |
753 | * | |
754 | * @size: size to allocate | |
755 | * @gfp: gfp flags | |
756 | */ | |
757 | struct sk_buff *nfc_alloc_recv_skb(unsigned int size, gfp_t gfp) | |
3e256b8f LRV |
758 | { |
759 | struct sk_buff *skb; | |
760 | unsigned int total_size; | |
761 | ||
762 | total_size = size + 1; | |
763 | skb = alloc_skb(total_size, gfp); | |
764 | ||
765 | if (skb) | |
766 | skb_reserve(skb, 1); | |
767 | ||
768 | return skb; | |
769 | } | |
7c7cd3bf | 770 | EXPORT_SYMBOL(nfc_alloc_recv_skb); |
3e256b8f | 771 | |
4d12b8b1 LRV |
772 | /** |
773 | * nfc_targets_found - inform that targets were found | |
774 | * | |
775 | * @dev: The nfc device that found the targets | |
776 | * @targets: array of nfc targets found | |
777 | * @ntargets: targets array size | |
778 | * | |
779 | * The device driver must call this function when one or many nfc targets | |
780 | * are found. After calling this function, the device driver must stop | |
781 | * polling for targets. | |
d94f9c55 EL |
782 | * NOTE: This function can be called with targets=NULL and n_targets=0 to |
783 | * notify a driver error, meaning that the polling operation cannot complete. | |
d4ccb132 EL |
784 | * IMPORTANT: this function must not be called from an atomic context. |
785 | * In addition, it must also not be called from a context that would prevent | |
786 | * the NFC Core to call other nfc ops entry point concurrently. | |
4d12b8b1 | 787 | */ |
0a40acb2 SO |
788 | int nfc_targets_found(struct nfc_dev *dev, |
789 | struct nfc_target *targets, int n_targets) | |
4d12b8b1 | 790 | { |
c4fbb651 SO |
791 | int i; |
792 | ||
20c239c1 | 793 | pr_debug("dev_name=%s n_targets=%d\n", dev_name(&dev->dev), n_targets); |
4d12b8b1 | 794 | |
c4fbb651 | 795 | for (i = 0; i < n_targets; i++) |
01ae0eea | 796 | targets[i].idx = dev->target_next_idx++; |
c4fbb651 | 797 | |
d4ccb132 | 798 | device_lock(&dev->dev); |
4d12b8b1 | 799 | |
8668fdd6 EL |
800 | if (dev->polling == false) { |
801 | device_unlock(&dev->dev); | |
802 | return 0; | |
803 | } | |
804 | ||
805 | dev->polling = false; | |
806 | ||
4d12b8b1 LRV |
807 | dev->targets_generation++; |
808 | ||
809 | kfree(dev->targets); | |
d94f9c55 | 810 | dev->targets = NULL; |
4d12b8b1 | 811 | |
d94f9c55 EL |
812 | if (targets) { |
813 | dev->targets = kmemdup(targets, | |
814 | n_targets * sizeof(struct nfc_target), | |
815 | GFP_ATOMIC); | |
816 | ||
817 | if (!dev->targets) { | |
818 | dev->n_targets = 0; | |
819 | device_unlock(&dev->dev); | |
820 | return -ENOMEM; | |
821 | } | |
4d12b8b1 LRV |
822 | } |
823 | ||
824 | dev->n_targets = n_targets; | |
d4ccb132 | 825 | device_unlock(&dev->dev); |
4d12b8b1 LRV |
826 | |
827 | nfc_genl_targets_found(dev); | |
828 | ||
829 | return 0; | |
830 | } | |
831 | EXPORT_SYMBOL(nfc_targets_found); | |
832 | ||
d4ccb132 EL |
833 | /** |
834 | * nfc_target_lost - inform that an activated target went out of field | |
835 | * | |
836 | * @dev: The nfc device that had the activated target in field | |
837 | * @target_idx: the nfc index of the target | |
838 | * | |
839 | * The device driver must call this function when the activated target | |
840 | * goes out of the field. | |
841 | * IMPORTANT: this function must not be called from an atomic context. | |
842 | * In addition, it must also not be called from a context that would prevent | |
843 | * the NFC Core to call other nfc ops entry point concurrently. | |
844 | */ | |
e1da0efa EL |
845 | int nfc_target_lost(struct nfc_dev *dev, u32 target_idx) |
846 | { | |
847 | struct nfc_target *tg; | |
848 | int i; | |
849 | ||
850 | pr_debug("dev_name %s n_target %d\n", dev_name(&dev->dev), target_idx); | |
851 | ||
d4ccb132 | 852 | device_lock(&dev->dev); |
e1da0efa EL |
853 | |
854 | for (i = 0; i < dev->n_targets; i++) { | |
855 | tg = &dev->targets[i]; | |
856 | if (tg->idx == target_idx) | |
857 | break; | |
858 | } | |
859 | ||
860 | if (i == dev->n_targets) { | |
d4ccb132 | 861 | device_unlock(&dev->dev); |
e1da0efa EL |
862 | return -EINVAL; |
863 | } | |
864 | ||
865 | dev->targets_generation++; | |
866 | dev->n_targets--; | |
90099433 | 867 | dev->active_target = NULL; |
e1da0efa EL |
868 | |
869 | if (dev->n_targets) { | |
870 | memcpy(&dev->targets[i], &dev->targets[i + 1], | |
871 | (dev->n_targets - i) * sizeof(struct nfc_target)); | |
872 | } else { | |
873 | kfree(dev->targets); | |
874 | dev->targets = NULL; | |
875 | } | |
876 | ||
d4ccb132 | 877 | device_unlock(&dev->dev); |
e1da0efa EL |
878 | |
879 | nfc_genl_target_lost(dev, target_idx); | |
880 | ||
881 | return 0; | |
882 | } | |
883 | EXPORT_SYMBOL(nfc_target_lost); | |
884 | ||
9eb334ac | 885 | inline void nfc_driver_failure(struct nfc_dev *dev, int err) |
456411ca | 886 | { |
9eb334ac | 887 | nfc_targets_found(dev, NULL, 0); |
456411ca EL |
888 | } |
889 | EXPORT_SYMBOL(nfc_driver_failure); | |
890 | ||
fed7c25e SO |
891 | int nfc_add_se(struct nfc_dev *dev, u32 se_idx, u16 type) |
892 | { | |
c531c9ec | 893 | struct nfc_se *se; |
2757c372 | 894 | int rc; |
fed7c25e SO |
895 | |
896 | pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); | |
897 | ||
d8eb18ee | 898 | se = nfc_find_se(dev, se_idx); |
c531c9ec SO |
899 | if (se) |
900 | return -EALREADY; | |
fed7c25e SO |
901 | |
902 | se = kzalloc(sizeof(struct nfc_se), GFP_KERNEL); | |
903 | if (!se) | |
904 | return -ENOMEM; | |
905 | ||
906 | se->idx = se_idx; | |
907 | se->type = type; | |
908 | se->state = NFC_SE_DISABLED; | |
909 | INIT_LIST_HEAD(&se->list); | |
910 | ||
911 | list_add(&se->list, &dev->secure_elements); | |
912 | ||
2757c372 SO |
913 | rc = nfc_genl_se_added(dev, se_idx, type); |
914 | if (rc < 0) { | |
915 | list_del(&se->list); | |
916 | kfree(se); | |
917 | ||
918 | return rc; | |
919 | } | |
920 | ||
fed7c25e SO |
921 | return 0; |
922 | } | |
923 | EXPORT_SYMBOL(nfc_add_se); | |
924 | ||
925 | int nfc_remove_se(struct nfc_dev *dev, u32 se_idx) | |
926 | { | |
927 | struct nfc_se *se, *n; | |
2757c372 | 928 | int rc; |
fed7c25e SO |
929 | |
930 | pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); | |
931 | ||
932 | list_for_each_entry_safe(se, n, &dev->secure_elements, list) | |
933 | if (se->idx == se_idx) { | |
2757c372 SO |
934 | rc = nfc_genl_se_removed(dev, se_idx); |
935 | if (rc < 0) | |
936 | return rc; | |
937 | ||
fed7c25e SO |
938 | list_del(&se->list); |
939 | kfree(se); | |
940 | ||
941 | return 0; | |
942 | } | |
943 | ||
944 | return -EINVAL; | |
945 | } | |
946 | EXPORT_SYMBOL(nfc_remove_se); | |
947 | ||
3e256b8f LRV |
948 | static void nfc_release(struct device *d) |
949 | { | |
950 | struct nfc_dev *dev = to_nfc_dev(d); | |
ee656e9d | 951 | struct nfc_se *se, *n; |
3e256b8f | 952 | |
20c239c1 | 953 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
3e256b8f | 954 | |
4d12b8b1 LRV |
955 | nfc_genl_data_exit(&dev->genl_data); |
956 | kfree(dev->targets); | |
ee656e9d SO |
957 | |
958 | list_for_each_entry_safe(se, n, &dev->secure_elements, list) { | |
959 | nfc_genl_se_removed(dev, se->idx); | |
960 | list_del(&se->list); | |
961 | kfree(se); | |
962 | } | |
963 | ||
3e256b8f LRV |
964 | kfree(dev); |
965 | } | |
966 | ||
c8d56ae7 EL |
967 | static void nfc_check_pres_work(struct work_struct *work) |
968 | { | |
969 | struct nfc_dev *dev = container_of(work, struct nfc_dev, | |
970 | check_pres_work); | |
971 | int rc; | |
972 | ||
973 | device_lock(&dev->dev); | |
974 | ||
90099433 EL |
975 | if (dev->active_target && timer_pending(&dev->check_pres_timer) == 0) { |
976 | rc = dev->ops->check_presence(dev, dev->active_target); | |
632c016a EL |
977 | if (rc == -EOPNOTSUPP) |
978 | goto exit; | |
f0c91038 | 979 | if (rc) { |
d4ccb132 EL |
980 | u32 active_target_idx = dev->active_target->idx; |
981 | device_unlock(&dev->dev); | |
982 | nfc_target_lost(dev, active_target_idx); | |
983 | return; | |
c8d56ae7 | 984 | } |
f0c91038 EL |
985 | |
986 | if (!dev->shutting_down) | |
987 | mod_timer(&dev->check_pres_timer, jiffies + | |
988 | msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS)); | |
c8d56ae7 EL |
989 | } |
990 | ||
632c016a | 991 | exit: |
c8d56ae7 EL |
992 | device_unlock(&dev->dev); |
993 | } | |
994 | ||
995 | static void nfc_check_pres_timeout(unsigned long data) | |
996 | { | |
997 | struct nfc_dev *dev = (struct nfc_dev *)data; | |
998 | ||
916082b0 | 999 | schedule_work(&dev->check_pres_work); |
c8d56ae7 EL |
1000 | } |
1001 | ||
3e256b8f LRV |
1002 | struct class nfc_class = { |
1003 | .name = "nfc", | |
1004 | .dev_release = nfc_release, | |
1005 | }; | |
1006 | EXPORT_SYMBOL(nfc_class); | |
1007 | ||
9f3b795a | 1008 | static int match_idx(struct device *d, const void *data) |
3e256b8f LRV |
1009 | { |
1010 | struct nfc_dev *dev = to_nfc_dev(d); | |
9f3b795a | 1011 | const unsigned int *idx = data; |
3e256b8f LRV |
1012 | |
1013 | return dev->idx == *idx; | |
1014 | } | |
1015 | ||
95c96174 | 1016 | struct nfc_dev *nfc_get_device(unsigned int idx) |
3e256b8f LRV |
1017 | { |
1018 | struct device *d; | |
1019 | ||
1020 | d = class_find_device(&nfc_class, NULL, &idx, match_idx); | |
1021 | if (!d) | |
1022 | return NULL; | |
1023 | ||
1024 | return to_nfc_dev(d); | |
1025 | } | |
1026 | ||
1027 | /** | |
1028 | * nfc_allocate_device - allocate a new nfc device | |
1029 | * | |
1030 | * @ops: device operations | |
1031 | * @supported_protocols: NFC protocols supported by the device | |
1032 | */ | |
1033 | struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops, | |
0a40acb2 SO |
1034 | u32 supported_protocols, |
1035 | int tx_headroom, int tx_tailroom) | |
3e256b8f | 1036 | { |
3e256b8f LRV |
1037 | struct nfc_dev *dev; |
1038 | ||
1039 | if (!ops->start_poll || !ops->stop_poll || !ops->activate_target || | |
be9ae4ce | 1040 | !ops->deactivate_target || !ops->im_transceive) |
3e256b8f LRV |
1041 | return NULL; |
1042 | ||
1043 | if (!supported_protocols) | |
1044 | return NULL; | |
1045 | ||
1046 | dev = kzalloc(sizeof(struct nfc_dev), GFP_KERNEL); | |
1047 | if (!dev) | |
1048 | return NULL; | |
1049 | ||
3e256b8f LRV |
1050 | dev->ops = ops; |
1051 | dev->supported_protocols = supported_protocols; | |
e8753043 SO |
1052 | dev->tx_headroom = tx_headroom; |
1053 | dev->tx_tailroom = tx_tailroom; | |
fed7c25e | 1054 | INIT_LIST_HEAD(&dev->secure_elements); |
3e256b8f | 1055 | |
4d12b8b1 LRV |
1056 | nfc_genl_data_init(&dev->genl_data); |
1057 | ||
5bcf099c | 1058 | dev->rf_mode = NFC_RF_NONE; |
d4ccb132 | 1059 | |
4d12b8b1 LRV |
1060 | /* first generation must not be 0 */ |
1061 | dev->targets_generation = 1; | |
1062 | ||
c8d56ae7 | 1063 | if (ops->check_presence) { |
c8d56ae7 EL |
1064 | init_timer(&dev->check_pres_timer); |
1065 | dev->check_pres_timer.data = (unsigned long)dev; | |
1066 | dev->check_pres_timer.function = nfc_check_pres_timeout; | |
1067 | ||
1068 | INIT_WORK(&dev->check_pres_work, nfc_check_pres_work); | |
c8d56ae7 EL |
1069 | } |
1070 | ||
3e256b8f LRV |
1071 | return dev; |
1072 | } | |
1073 | EXPORT_SYMBOL(nfc_allocate_device); | |
1074 | ||
1075 | /** | |
1076 | * nfc_register_device - register a nfc device in the nfc subsystem | |
1077 | * | |
1078 | * @dev: The nfc device to register | |
1079 | */ | |
1080 | int nfc_register_device(struct nfc_dev *dev) | |
1081 | { | |
1082 | int rc; | |
1083 | ||
20c239c1 | 1084 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
3e256b8f | 1085 | |
7eda8b8e SO |
1086 | dev->idx = ida_simple_get(&nfc_index_ida, 0, 0, GFP_KERNEL); |
1087 | if (dev->idx < 0) | |
1088 | return dev->idx; | |
1089 | ||
1090 | dev->dev.class = &nfc_class; | |
1091 | dev_set_name(&dev->dev, "nfc%d", dev->idx); | |
1092 | device_initialize(&dev->dev); | |
1093 | ||
3e256b8f LRV |
1094 | mutex_lock(&nfc_devlist_mutex); |
1095 | nfc_devlist_generation++; | |
1096 | rc = device_add(&dev->dev); | |
1097 | mutex_unlock(&nfc_devlist_mutex); | |
1098 | ||
4d12b8b1 LRV |
1099 | if (rc < 0) |
1100 | return rc; | |
1101 | ||
d646960f SO |
1102 | rc = nfc_llcp_register_device(dev); |
1103 | if (rc) | |
1104 | pr_err("Could not register llcp device\n"); | |
1105 | ||
4d12b8b1 LRV |
1106 | rc = nfc_genl_device_added(dev); |
1107 | if (rc) | |
20c239c1 JP |
1108 | pr_debug("The userspace won't be notified that the device %s was added\n", |
1109 | dev_name(&dev->dev)); | |
4d12b8b1 | 1110 | |
be055b2f SO |
1111 | dev->rfkill = rfkill_alloc(dev_name(&dev->dev), &dev->dev, |
1112 | RFKILL_TYPE_NFC, &nfc_rfkill_ops, dev); | |
1113 | if (dev->rfkill) { | |
1114 | if (rfkill_register(dev->rfkill) < 0) { | |
1115 | rfkill_destroy(dev->rfkill); | |
1116 | dev->rfkill = NULL; | |
1117 | } | |
1118 | } | |
1119 | ||
4d12b8b1 | 1120 | return 0; |
3e256b8f LRV |
1121 | } |
1122 | EXPORT_SYMBOL(nfc_register_device); | |
1123 | ||
1124 | /** | |
1125 | * nfc_unregister_device - unregister a nfc device in the nfc subsystem | |
1126 | * | |
1127 | * @dev: The nfc device to unregister | |
1128 | */ | |
1129 | void nfc_unregister_device(struct nfc_dev *dev) | |
1130 | { | |
7eda8b8e | 1131 | int rc, id; |
4d12b8b1 | 1132 | |
20c239c1 | 1133 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
3e256b8f | 1134 | |
7eda8b8e SO |
1135 | id = dev->idx; |
1136 | ||
be055b2f SO |
1137 | if (dev->rfkill) { |
1138 | rfkill_unregister(dev->rfkill); | |
1139 | rfkill_destroy(dev->rfkill); | |
1140 | } | |
1141 | ||
f0c91038 EL |
1142 | if (dev->ops->check_presence) { |
1143 | device_lock(&dev->dev); | |
1144 | dev->shutting_down = true; | |
1145 | device_unlock(&dev->dev); | |
1146 | del_timer_sync(&dev->check_pres_timer); | |
1147 | cancel_work_sync(&dev->check_pres_work); | |
1148 | } | |
3e256b8f | 1149 | |
f0c91038 EL |
1150 | rc = nfc_genl_device_removed(dev); |
1151 | if (rc) | |
1152 | pr_debug("The userspace won't be notified that the device %s " | |
1153 | "was removed\n", dev_name(&dev->dev)); | |
4d12b8b1 | 1154 | |
d646960f SO |
1155 | nfc_llcp_unregister_device(dev); |
1156 | ||
f0c91038 EL |
1157 | mutex_lock(&nfc_devlist_mutex); |
1158 | nfc_devlist_generation++; | |
1159 | device_del(&dev->dev); | |
1160 | mutex_unlock(&nfc_devlist_mutex); | |
4d12b8b1 | 1161 | |
7eda8b8e | 1162 | ida_simple_remove(&nfc_index_ida, id); |
3e256b8f LRV |
1163 | } |
1164 | EXPORT_SYMBOL(nfc_unregister_device); | |
1165 | ||
1166 | static int __init nfc_init(void) | |
1167 | { | |
4d12b8b1 LRV |
1168 | int rc; |
1169 | ||
ed1e0ad8 | 1170 | pr_info("NFC Core ver %s\n", VERSION); |
3e256b8f | 1171 | |
4d12b8b1 LRV |
1172 | rc = class_register(&nfc_class); |
1173 | if (rc) | |
1174 | return rc; | |
1175 | ||
1176 | rc = nfc_genl_init(); | |
1177 | if (rc) | |
1178 | goto err_genl; | |
1179 | ||
1180 | /* the first generation must not be 0 */ | |
1181 | nfc_devlist_generation = 1; | |
1182 | ||
23b7869c LRV |
1183 | rc = rawsock_init(); |
1184 | if (rc) | |
1185 | goto err_rawsock; | |
1186 | ||
d646960f SO |
1187 | rc = nfc_llcp_init(); |
1188 | if (rc) | |
1189 | goto err_llcp_sock; | |
1190 | ||
c7fe3b52 AAJ |
1191 | rc = af_nfc_init(); |
1192 | if (rc) | |
1193 | goto err_af_nfc; | |
1194 | ||
4d12b8b1 LRV |
1195 | return 0; |
1196 | ||
c7fe3b52 | 1197 | err_af_nfc: |
d646960f SO |
1198 | nfc_llcp_exit(); |
1199 | err_llcp_sock: | |
23b7869c LRV |
1200 | rawsock_exit(); |
1201 | err_rawsock: | |
c7fe3b52 | 1202 | nfc_genl_exit(); |
4d12b8b1 LRV |
1203 | err_genl: |
1204 | class_unregister(&nfc_class); | |
1205 | return rc; | |
3e256b8f LRV |
1206 | } |
1207 | ||
1208 | static void __exit nfc_exit(void) | |
1209 | { | |
c7fe3b52 | 1210 | af_nfc_exit(); |
d646960f | 1211 | nfc_llcp_exit(); |
23b7869c | 1212 | rawsock_exit(); |
4d12b8b1 | 1213 | nfc_genl_exit(); |
3e256b8f LRV |
1214 | class_unregister(&nfc_class); |
1215 | } | |
1216 | ||
1217 | subsys_initcall(nfc_init); | |
1218 | module_exit(nfc_exit); | |
1219 | ||
1220 | MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>"); | |
1221 | MODULE_DESCRIPTION("NFC Core ver " VERSION); | |
1222 | MODULE_VERSION(VERSION); | |
1223 | MODULE_LICENSE("GPL"); | |
1155bb61 | 1224 | MODULE_ALIAS_NETPROTO(PF_NFC); |
5df16cad | 1225 | MODULE_ALIAS_GENL_FAMILY(NFC_GENL_NAME); |