Commit | Line | Data |
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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 | |
98b32dec | 19 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
3e256b8f LRV |
20 | */ |
21 | ||
52858b51 | 22 | #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__ |
ed1e0ad8 | 23 | |
3e256b8f LRV |
24 | #include <linux/init.h> |
25 | #include <linux/kernel.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/slab.h> | |
be055b2f | 28 | #include <linux/rfkill.h> |
7c7cd3bf | 29 | #include <linux/nfc.h> |
3e256b8f | 30 | |
5df16cad SO |
31 | #include <net/genetlink.h> |
32 | ||
3e256b8f LRV |
33 | #include "nfc.h" |
34 | ||
35 | #define VERSION "0.1" | |
36 | ||
c8d56ae7 EL |
37 | #define NFC_CHECK_PRES_FREQ_MS 2000 |
38 | ||
3e256b8f LRV |
39 | int nfc_devlist_generation; |
40 | DEFINE_MUTEX(nfc_devlist_mutex); | |
41 | ||
7eda8b8e SO |
42 | /* NFC device ID bitmap */ |
43 | static DEFINE_IDA(nfc_index_ida); | |
44 | ||
9ea7187c | 45 | int nfc_fw_download(struct nfc_dev *dev, const char *firmware_name) |
9674da87 EL |
46 | { |
47 | int rc = 0; | |
48 | ||
49 | pr_debug("%s do firmware %s\n", dev_name(&dev->dev), firmware_name); | |
50 | ||
51 | device_lock(&dev->dev); | |
52 | ||
53 | if (!device_is_registered(&dev->dev)) { | |
54 | rc = -ENODEV; | |
55 | goto error; | |
56 | } | |
57 | ||
58 | if (dev->dev_up) { | |
59 | rc = -EBUSY; | |
60 | goto error; | |
61 | } | |
62 | ||
9ea7187c | 63 | if (!dev->ops->fw_download) { |
9674da87 EL |
64 | rc = -EOPNOTSUPP; |
65 | goto error; | |
66 | } | |
67 | ||
9ea7187c SO |
68 | dev->fw_download_in_progress = true; |
69 | rc = dev->ops->fw_download(dev, firmware_name); | |
9674da87 | 70 | if (rc) |
9ea7187c | 71 | dev->fw_download_in_progress = false; |
9674da87 EL |
72 | |
73 | error: | |
74 | device_unlock(&dev->dev); | |
75 | return rc; | |
76 | } | |
77 | ||
352a5f5f EL |
78 | /** |
79 | * nfc_fw_download_done - inform that a firmware download was completed | |
80 | * | |
81 | * @dev: The nfc device to which firmware was downloaded | |
82 | * @firmware_name: The firmware filename | |
83 | * @result: The positive value of a standard errno value | |
84 | */ | |
85 | int nfc_fw_download_done(struct nfc_dev *dev, const char *firmware_name, | |
86 | u32 result) | |
9674da87 | 87 | { |
9ea7187c | 88 | dev->fw_download_in_progress = false; |
9674da87 | 89 | |
352a5f5f | 90 | return nfc_genl_fw_download_done(dev, firmware_name, result); |
9674da87 | 91 | } |
9ea7187c | 92 | EXPORT_SYMBOL(nfc_fw_download_done); |
9674da87 | 93 | |
8b3fe7b5 IE |
94 | /** |
95 | * nfc_dev_up - turn on the NFC device | |
96 | * | |
97 | * @dev: The nfc device to be turned on | |
98 | * | |
99 | * The device remains up until the nfc_dev_down function is called. | |
100 | */ | |
101 | int nfc_dev_up(struct nfc_dev *dev) | |
102 | { | |
103 | int rc = 0; | |
104 | ||
20c239c1 | 105 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
8b3fe7b5 IE |
106 | |
107 | device_lock(&dev->dev); | |
108 | ||
be055b2f SO |
109 | if (dev->rfkill && rfkill_blocked(dev->rfkill)) { |
110 | rc = -ERFKILL; | |
111 | goto error; | |
112 | } | |
113 | ||
8b3fe7b5 IE |
114 | if (!device_is_registered(&dev->dev)) { |
115 | rc = -ENODEV; | |
116 | goto error; | |
117 | } | |
118 | ||
9ea7187c | 119 | if (dev->fw_download_in_progress) { |
9674da87 EL |
120 | rc = -EBUSY; |
121 | goto error; | |
122 | } | |
123 | ||
8b3fe7b5 IE |
124 | if (dev->dev_up) { |
125 | rc = -EALREADY; | |
126 | goto error; | |
127 | } | |
128 | ||
129 | if (dev->ops->dev_up) | |
130 | rc = dev->ops->dev_up(dev); | |
131 | ||
132 | if (!rc) | |
133 | dev->dev_up = true; | |
134 | ||
0a946301 SO |
135 | /* We have to enable the device before discovering SEs */ |
136 | if (dev->ops->discover_se) { | |
137 | rc = dev->ops->discover_se(dev); | |
369f4d50 | 138 | if (rc) |
0a946301 SO |
139 | pr_warn("SE discovery failed\n"); |
140 | } | |
141 | ||
8b3fe7b5 IE |
142 | error: |
143 | device_unlock(&dev->dev); | |
144 | return rc; | |
145 | } | |
146 | ||
147 | /** | |
148 | * nfc_dev_down - turn off the NFC device | |
149 | * | |
150 | * @dev: The nfc device to be turned off | |
151 | */ | |
152 | int nfc_dev_down(struct nfc_dev *dev) | |
153 | { | |
154 | int rc = 0; | |
155 | ||
20c239c1 | 156 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
8b3fe7b5 IE |
157 | |
158 | device_lock(&dev->dev); | |
159 | ||
160 | if (!device_is_registered(&dev->dev)) { | |
161 | rc = -ENODEV; | |
162 | goto error; | |
163 | } | |
164 | ||
165 | if (!dev->dev_up) { | |
166 | rc = -EALREADY; | |
167 | goto error; | |
168 | } | |
169 | ||
90099433 | 170 | if (dev->polling || dev->active_target) { |
8b3fe7b5 IE |
171 | rc = -EBUSY; |
172 | goto error; | |
173 | } | |
174 | ||
175 | if (dev->ops->dev_down) | |
176 | dev->ops->dev_down(dev); | |
177 | ||
178 | dev->dev_up = false; | |
179 | ||
180 | error: | |
181 | device_unlock(&dev->dev); | |
182 | return rc; | |
183 | } | |
184 | ||
be055b2f SO |
185 | static int nfc_rfkill_set_block(void *data, bool blocked) |
186 | { | |
187 | struct nfc_dev *dev = data; | |
188 | ||
189 | pr_debug("%s blocked %d", dev_name(&dev->dev), blocked); | |
190 | ||
191 | if (!blocked) | |
192 | return 0; | |
193 | ||
194 | nfc_dev_down(dev); | |
195 | ||
196 | return 0; | |
197 | } | |
198 | ||
199 | static const struct rfkill_ops nfc_rfkill_ops = { | |
200 | .set_block = nfc_rfkill_set_block, | |
201 | }; | |
202 | ||
3e256b8f LRV |
203 | /** |
204 | * nfc_start_poll - start polling for nfc targets | |
205 | * | |
206 | * @dev: The nfc device that must start polling | |
207 | * @protocols: bitset of nfc protocols that must be used for polling | |
208 | * | |
209 | * The device remains polling for targets until a target is found or | |
210 | * the nfc_stop_poll function is called. | |
211 | */ | |
fe7c5800 | 212 | int nfc_start_poll(struct nfc_dev *dev, u32 im_protocols, u32 tm_protocols) |
3e256b8f LRV |
213 | { |
214 | int rc; | |
215 | ||
fe7c5800 SO |
216 | pr_debug("dev_name %s initiator protocols 0x%x target protocols 0x%x\n", |
217 | dev_name(&dev->dev), im_protocols, tm_protocols); | |
3e256b8f | 218 | |
fe7c5800 | 219 | if (!im_protocols && !tm_protocols) |
3e256b8f LRV |
220 | return -EINVAL; |
221 | ||
222 | device_lock(&dev->dev); | |
223 | ||
224 | if (!device_is_registered(&dev->dev)) { | |
225 | rc = -ENODEV; | |
226 | goto error; | |
227 | } | |
228 | ||
7757dc8a SO |
229 | if (!dev->dev_up) { |
230 | rc = -ENODEV; | |
231 | goto error; | |
232 | } | |
233 | ||
3e256b8f LRV |
234 | if (dev->polling) { |
235 | rc = -EBUSY; | |
236 | goto error; | |
237 | } | |
238 | ||
fe7c5800 | 239 | rc = dev->ops->start_poll(dev, im_protocols, tm_protocols); |
f212ad5e | 240 | if (!rc) { |
3e256b8f | 241 | dev->polling = true; |
f212ad5e SO |
242 | dev->rf_mode = NFC_RF_NONE; |
243 | } | |
3e256b8f LRV |
244 | |
245 | error: | |
246 | device_unlock(&dev->dev); | |
247 | return rc; | |
248 | } | |
249 | ||
250 | /** | |
251 | * nfc_stop_poll - stop polling for nfc targets | |
252 | * | |
253 | * @dev: The nfc device that must stop polling | |
254 | */ | |
255 | int nfc_stop_poll(struct nfc_dev *dev) | |
256 | { | |
257 | int rc = 0; | |
258 | ||
20c239c1 | 259 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
3e256b8f LRV |
260 | |
261 | device_lock(&dev->dev); | |
262 | ||
263 | if (!device_is_registered(&dev->dev)) { | |
264 | rc = -ENODEV; | |
265 | goto error; | |
266 | } | |
267 | ||
268 | if (!dev->polling) { | |
269 | rc = -EINVAL; | |
270 | goto error; | |
271 | } | |
272 | ||
273 | dev->ops->stop_poll(dev); | |
274 | dev->polling = false; | |
5bcf099c | 275 | dev->rf_mode = NFC_RF_NONE; |
3e256b8f LRV |
276 | |
277 | error: | |
278 | device_unlock(&dev->dev); | |
279 | return rc; | |
280 | } | |
281 | ||
90099433 EL |
282 | static struct nfc_target *nfc_find_target(struct nfc_dev *dev, u32 target_idx) |
283 | { | |
284 | int i; | |
285 | ||
286 | if (dev->n_targets == 0) | |
287 | return NULL; | |
288 | ||
0f450772 | 289 | for (i = 0; i < dev->n_targets; i++) { |
90099433 EL |
290 | if (dev->targets[i].idx == target_idx) |
291 | return &dev->targets[i]; | |
292 | } | |
293 | ||
294 | return NULL; | |
295 | } | |
296 | ||
47807d3d | 297 | int nfc_dep_link_up(struct nfc_dev *dev, int target_index, u8 comm_mode) |
1ed28f61 SO |
298 | { |
299 | int rc = 0; | |
47807d3d SO |
300 | u8 *gb; |
301 | size_t gb_len; | |
90099433 | 302 | struct nfc_target *target; |
1ed28f61 | 303 | |
47807d3d | 304 | pr_debug("dev_name=%s comm %d\n", dev_name(&dev->dev), comm_mode); |
1ed28f61 SO |
305 | |
306 | if (!dev->ops->dep_link_up) | |
307 | return -EOPNOTSUPP; | |
308 | ||
309 | device_lock(&dev->dev); | |
310 | ||
311 | if (!device_is_registered(&dev->dev)) { | |
312 | rc = -ENODEV; | |
313 | goto error; | |
314 | } | |
315 | ||
316 | if (dev->dep_link_up == true) { | |
317 | rc = -EALREADY; | |
318 | goto error; | |
319 | } | |
320 | ||
47807d3d SO |
321 | gb = nfc_llcp_general_bytes(dev, &gb_len); |
322 | if (gb_len > NFC_MAX_GT_LEN) { | |
323 | rc = -EINVAL; | |
324 | goto error; | |
325 | } | |
326 | ||
90099433 EL |
327 | target = nfc_find_target(dev, target_index); |
328 | if (target == NULL) { | |
329 | rc = -ENOTCONN; | |
330 | goto error; | |
331 | } | |
332 | ||
333 | rc = dev->ops->dep_link_up(dev, target, comm_mode, gb, gb_len); | |
f212ad5e | 334 | if (!rc) { |
90099433 | 335 | dev->active_target = target; |
f212ad5e SO |
336 | dev->rf_mode = NFC_RF_INITIATOR; |
337 | } | |
1ed28f61 SO |
338 | |
339 | error: | |
340 | device_unlock(&dev->dev); | |
341 | return rc; | |
342 | } | |
343 | ||
344 | int nfc_dep_link_down(struct nfc_dev *dev) | |
345 | { | |
346 | int rc = 0; | |
347 | ||
348 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); | |
349 | ||
350 | if (!dev->ops->dep_link_down) | |
351 | return -EOPNOTSUPP; | |
352 | ||
353 | device_lock(&dev->dev); | |
354 | ||
355 | if (!device_is_registered(&dev->dev)) { | |
356 | rc = -ENODEV; | |
357 | goto error; | |
358 | } | |
359 | ||
360 | if (dev->dep_link_up == false) { | |
361 | rc = -EALREADY; | |
362 | goto error; | |
363 | } | |
364 | ||
1ed28f61 SO |
365 | rc = dev->ops->dep_link_down(dev); |
366 | if (!rc) { | |
367 | dev->dep_link_up = false; | |
90099433 | 368 | dev->active_target = NULL; |
5bcf099c | 369 | dev->rf_mode = NFC_RF_NONE; |
d646960f | 370 | nfc_llcp_mac_is_down(dev); |
1ed28f61 SO |
371 | nfc_genl_dep_link_down_event(dev); |
372 | } | |
373 | ||
374 | error: | |
375 | device_unlock(&dev->dev); | |
5bcf099c | 376 | |
1ed28f61 SO |
377 | return rc; |
378 | } | |
379 | ||
380 | int nfc_dep_link_is_up(struct nfc_dev *dev, u32 target_idx, | |
0a40acb2 | 381 | u8 comm_mode, u8 rf_mode) |
1ed28f61 SO |
382 | { |
383 | dev->dep_link_up = true; | |
1ed28f61 | 384 | |
e29a9e2a SO |
385 | if (!dev->active_target) { |
386 | struct nfc_target *target; | |
387 | ||
388 | target = nfc_find_target(dev, target_idx); | |
389 | if (target == NULL) | |
390 | return -ENOTCONN; | |
391 | ||
392 | dev->active_target = target; | |
393 | } | |
394 | ||
395 | dev->polling = false; | |
396 | dev->rf_mode = rf_mode; | |
397 | ||
d646960f SO |
398 | nfc_llcp_mac_is_up(dev, target_idx, comm_mode, rf_mode); |
399 | ||
1ed28f61 SO |
400 | return nfc_genl_dep_link_up_event(dev, target_idx, comm_mode, rf_mode); |
401 | } | |
402 | EXPORT_SYMBOL(nfc_dep_link_is_up); | |
403 | ||
3e256b8f LRV |
404 | /** |
405 | * nfc_activate_target - prepare the target for data exchange | |
406 | * | |
407 | * @dev: The nfc device that found the target | |
408 | * @target_idx: index of the target that must be activated | |
409 | * @protocol: nfc protocol that will be used for data exchange | |
410 | */ | |
411 | int nfc_activate_target(struct nfc_dev *dev, u32 target_idx, u32 protocol) | |
412 | { | |
413 | int rc; | |
90099433 | 414 | struct nfc_target *target; |
3e256b8f | 415 | |
20c239c1 JP |
416 | pr_debug("dev_name=%s target_idx=%u protocol=%u\n", |
417 | dev_name(&dev->dev), target_idx, protocol); | |
3e256b8f LRV |
418 | |
419 | device_lock(&dev->dev); | |
420 | ||
421 | if (!device_is_registered(&dev->dev)) { | |
422 | rc = -ENODEV; | |
423 | goto error; | |
424 | } | |
425 | ||
90099433 EL |
426 | if (dev->active_target) { |
427 | rc = -EBUSY; | |
428 | goto error; | |
429 | } | |
430 | ||
431 | target = nfc_find_target(dev, target_idx); | |
432 | if (target == NULL) { | |
433 | rc = -ENOTCONN; | |
434 | goto error; | |
435 | } | |
436 | ||
437 | rc = dev->ops->activate_target(dev, target, protocol); | |
c8d56ae7 | 438 | if (!rc) { |
90099433 | 439 | dev->active_target = target; |
f212ad5e | 440 | dev->rf_mode = NFC_RF_INITIATOR; |
3e256b8f | 441 | |
f0c91038 | 442 | if (dev->ops->check_presence && !dev->shutting_down) |
c8d56ae7 EL |
443 | mod_timer(&dev->check_pres_timer, jiffies + |
444 | msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS)); | |
445 | } | |
3e256b8f LRV |
446 | |
447 | error: | |
448 | device_unlock(&dev->dev); | |
449 | return rc; | |
450 | } | |
451 | ||
452 | /** | |
453 | * nfc_deactivate_target - deactivate a nfc target | |
454 | * | |
455 | * @dev: The nfc device that found the target | |
456 | * @target_idx: index of the target that must be deactivated | |
457 | */ | |
458 | int nfc_deactivate_target(struct nfc_dev *dev, u32 target_idx) | |
459 | { | |
460 | int rc = 0; | |
461 | ||
20c239c1 JP |
462 | pr_debug("dev_name=%s target_idx=%u\n", |
463 | dev_name(&dev->dev), target_idx); | |
3e256b8f LRV |
464 | |
465 | device_lock(&dev->dev); | |
466 | ||
467 | if (!device_is_registered(&dev->dev)) { | |
468 | rc = -ENODEV; | |
469 | goto error; | |
470 | } | |
471 | ||
90099433 EL |
472 | if (dev->active_target == NULL) { |
473 | rc = -ENOTCONN; | |
474 | goto error; | |
475 | } | |
476 | ||
477 | if (dev->active_target->idx != target_idx) { | |
478 | rc = -ENOTCONN; | |
479 | goto error; | |
480 | } | |
481 | ||
c8d56ae7 EL |
482 | if (dev->ops->check_presence) |
483 | del_timer_sync(&dev->check_pres_timer); | |
484 | ||
90099433 EL |
485 | dev->ops->deactivate_target(dev, dev->active_target); |
486 | dev->active_target = NULL; | |
3e256b8f LRV |
487 | |
488 | error: | |
489 | device_unlock(&dev->dev); | |
490 | return rc; | |
491 | } | |
492 | ||
493 | /** | |
494 | * nfc_data_exchange - transceive data | |
495 | * | |
496 | * @dev: The nfc device that found the target | |
497 | * @target_idx: index of the target | |
498 | * @skb: data to be sent | |
499 | * @cb: callback called when the response is received | |
500 | * @cb_context: parameter for the callback function | |
501 | * | |
502 | * The user must wait for the callback before calling this function again. | |
503 | */ | |
0a40acb2 SO |
504 | int nfc_data_exchange(struct nfc_dev *dev, u32 target_idx, struct sk_buff *skb, |
505 | data_exchange_cb_t cb, void *cb_context) | |
3e256b8f LRV |
506 | { |
507 | int rc; | |
508 | ||
20c239c1 JP |
509 | pr_debug("dev_name=%s target_idx=%u skb->len=%u\n", |
510 | dev_name(&dev->dev), target_idx, skb->len); | |
3e256b8f LRV |
511 | |
512 | device_lock(&dev->dev); | |
513 | ||
514 | if (!device_is_registered(&dev->dev)) { | |
515 | rc = -ENODEV; | |
516 | kfree_skb(skb); | |
517 | goto error; | |
518 | } | |
519 | ||
be9ae4ce SO |
520 | if (dev->rf_mode == NFC_RF_INITIATOR && dev->active_target != NULL) { |
521 | if (dev->active_target->idx != target_idx) { | |
522 | rc = -EADDRNOTAVAIL; | |
523 | kfree_skb(skb); | |
524 | goto error; | |
525 | } | |
144612ca | 526 | |
be9ae4ce SO |
527 | if (dev->ops->check_presence) |
528 | del_timer_sync(&dev->check_pres_timer); | |
529 | ||
530 | rc = dev->ops->im_transceive(dev, dev->active_target, skb, cb, | |
531 | cb_context); | |
532 | ||
f0c91038 | 533 | if (!rc && dev->ops->check_presence && !dev->shutting_down) |
be9ae4ce SO |
534 | mod_timer(&dev->check_pres_timer, jiffies + |
535 | msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS)); | |
536 | } else if (dev->rf_mode == NFC_RF_TARGET && dev->ops->tm_send != NULL) { | |
537 | rc = dev->ops->tm_send(dev, skb); | |
538 | } else { | |
539 | rc = -ENOTCONN; | |
144612ca EL |
540 | kfree_skb(skb); |
541 | goto error; | |
542 | } | |
543 | ||
c8d56ae7 | 544 | |
3e256b8f LRV |
545 | error: |
546 | device_unlock(&dev->dev); | |
547 | return rc; | |
548 | } | |
549 | ||
d8eb18ee | 550 | struct nfc_se *nfc_find_se(struct nfc_dev *dev, u32 se_idx) |
c531c9ec SO |
551 | { |
552 | struct nfc_se *se, *n; | |
553 | ||
554 | list_for_each_entry_safe(se, n, &dev->secure_elements, list) | |
555 | if (se->idx == se_idx) | |
556 | return se; | |
557 | ||
558 | return NULL; | |
559 | } | |
d8eb18ee | 560 | EXPORT_SYMBOL(nfc_find_se); |
c531c9ec SO |
561 | |
562 | int nfc_enable_se(struct nfc_dev *dev, u32 se_idx) | |
563 | { | |
564 | ||
565 | struct nfc_se *se; | |
566 | int rc; | |
567 | ||
568 | pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); | |
569 | ||
570 | device_lock(&dev->dev); | |
571 | ||
572 | if (!device_is_registered(&dev->dev)) { | |
573 | rc = -ENODEV; | |
574 | goto error; | |
575 | } | |
576 | ||
577 | if (!dev->dev_up) { | |
578 | rc = -ENODEV; | |
579 | goto error; | |
580 | } | |
581 | ||
582 | if (dev->polling) { | |
583 | rc = -EBUSY; | |
584 | goto error; | |
585 | } | |
586 | ||
587 | if (!dev->ops->enable_se || !dev->ops->disable_se) { | |
588 | rc = -EOPNOTSUPP; | |
589 | goto error; | |
590 | } | |
591 | ||
d8eb18ee | 592 | se = nfc_find_se(dev, se_idx); |
c531c9ec SO |
593 | if (!se) { |
594 | rc = -EINVAL; | |
595 | goto error; | |
596 | } | |
597 | ||
2c383283 | 598 | if (se->state == NFC_SE_ENABLED) { |
c531c9ec SO |
599 | rc = -EALREADY; |
600 | goto error; | |
601 | } | |
602 | ||
603 | rc = dev->ops->enable_se(dev, se_idx); | |
39525ee1 AW |
604 | if (rc >= 0) |
605 | se->state = NFC_SE_ENABLED; | |
c531c9ec SO |
606 | |
607 | error: | |
608 | device_unlock(&dev->dev); | |
609 | return rc; | |
610 | } | |
611 | ||
612 | int nfc_disable_se(struct nfc_dev *dev, u32 se_idx) | |
613 | { | |
614 | ||
615 | struct nfc_se *se; | |
616 | int rc; | |
617 | ||
618 | pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); | |
619 | ||
620 | device_lock(&dev->dev); | |
621 | ||
622 | if (!device_is_registered(&dev->dev)) { | |
623 | rc = -ENODEV; | |
624 | goto error; | |
625 | } | |
626 | ||
627 | if (!dev->dev_up) { | |
628 | rc = -ENODEV; | |
629 | goto error; | |
630 | } | |
631 | ||
632 | if (!dev->ops->enable_se || !dev->ops->disable_se) { | |
633 | rc = -EOPNOTSUPP; | |
634 | goto error; | |
635 | } | |
636 | ||
d8eb18ee | 637 | se = nfc_find_se(dev, se_idx); |
c531c9ec SO |
638 | if (!se) { |
639 | rc = -EINVAL; | |
640 | goto error; | |
641 | } | |
642 | ||
2c383283 | 643 | if (se->state == NFC_SE_DISABLED) { |
c531c9ec SO |
644 | rc = -EALREADY; |
645 | goto error; | |
646 | } | |
647 | ||
648 | rc = dev->ops->disable_se(dev, se_idx); | |
39525ee1 AW |
649 | if (rc >= 0) |
650 | se->state = NFC_SE_DISABLED; | |
c531c9ec SO |
651 | |
652 | error: | |
653 | device_unlock(&dev->dev); | |
654 | return rc; | |
655 | } | |
656 | ||
541d920b SO |
657 | int nfc_set_remote_general_bytes(struct nfc_dev *dev, u8 *gb, u8 gb_len) |
658 | { | |
0a40acb2 | 659 | pr_debug("dev_name=%s gb_len=%d\n", dev_name(&dev->dev), gb_len); |
541d920b SO |
660 | |
661 | if (gb_len > NFC_MAX_GT_LEN) | |
662 | return -EINVAL; | |
663 | ||
d646960f | 664 | return nfc_llcp_set_remote_gb(dev, gb, gb_len); |
541d920b SO |
665 | } |
666 | EXPORT_SYMBOL(nfc_set_remote_general_bytes); | |
667 | ||
ab73b751 SO |
668 | u8 *nfc_get_local_general_bytes(struct nfc_dev *dev, size_t *gb_len) |
669 | { | |
670 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); | |
671 | ||
672 | return nfc_llcp_general_bytes(dev, gb_len); | |
673 | } | |
674 | EXPORT_SYMBOL(nfc_get_local_general_bytes); | |
675 | ||
73167ced SO |
676 | int nfc_tm_data_received(struct nfc_dev *dev, struct sk_buff *skb) |
677 | { | |
678 | /* Only LLCP target mode for now */ | |
679 | if (dev->dep_link_up == false) { | |
680 | kfree_skb(skb); | |
681 | return -ENOLINK; | |
682 | } | |
683 | ||
684 | return nfc_llcp_data_received(dev, skb); | |
685 | } | |
686 | EXPORT_SYMBOL(nfc_tm_data_received); | |
687 | ||
fc40a8c1 SO |
688 | int nfc_tm_activated(struct nfc_dev *dev, u32 protocol, u8 comm_mode, |
689 | u8 *gb, size_t gb_len) | |
690 | { | |
691 | int rc; | |
692 | ||
693 | device_lock(&dev->dev); | |
694 | ||
695 | dev->polling = false; | |
696 | ||
697 | if (gb != NULL) { | |
698 | rc = nfc_set_remote_general_bytes(dev, gb, gb_len); | |
699 | if (rc < 0) | |
700 | goto out; | |
701 | } | |
702 | ||
f212ad5e SO |
703 | dev->rf_mode = NFC_RF_TARGET; |
704 | ||
fc40a8c1 SO |
705 | if (protocol == NFC_PROTO_NFC_DEP_MASK) |
706 | nfc_dep_link_is_up(dev, 0, comm_mode, NFC_RF_TARGET); | |
707 | ||
708 | rc = nfc_genl_tm_activated(dev, protocol); | |
709 | ||
710 | out: | |
711 | device_unlock(&dev->dev); | |
712 | ||
713 | return rc; | |
714 | } | |
715 | EXPORT_SYMBOL(nfc_tm_activated); | |
716 | ||
717 | int nfc_tm_deactivated(struct nfc_dev *dev) | |
718 | { | |
719 | dev->dep_link_up = false; | |
5bcf099c | 720 | dev->rf_mode = NFC_RF_NONE; |
fc40a8c1 SO |
721 | |
722 | return nfc_genl_tm_deactivated(dev); | |
723 | } | |
724 | EXPORT_SYMBOL(nfc_tm_deactivated); | |
725 | ||
3e256b8f | 726 | /** |
7c7cd3bf | 727 | * nfc_alloc_send_skb - allocate a skb for data exchange responses |
3e256b8f LRV |
728 | * |
729 | * @size: size to allocate | |
730 | * @gfp: gfp flags | |
731 | */ | |
7c7cd3bf | 732 | struct sk_buff *nfc_alloc_send_skb(struct nfc_dev *dev, struct sock *sk, |
0a40acb2 SO |
733 | unsigned int flags, unsigned int size, |
734 | unsigned int *err) | |
7c7cd3bf SO |
735 | { |
736 | struct sk_buff *skb; | |
737 | unsigned int total_size; | |
738 | ||
739 | total_size = size + | |
740 | dev->tx_headroom + dev->tx_tailroom + NFC_HEADER_SIZE; | |
741 | ||
742 | skb = sock_alloc_send_skb(sk, total_size, flags & MSG_DONTWAIT, err); | |
743 | if (skb) | |
744 | skb_reserve(skb, dev->tx_headroom + NFC_HEADER_SIZE); | |
745 | ||
746 | return skb; | |
747 | } | |
748 | ||
749 | /** | |
750 | * nfc_alloc_recv_skb - allocate a skb for data exchange responses | |
751 | * | |
752 | * @size: size to allocate | |
753 | * @gfp: gfp flags | |
754 | */ | |
755 | struct sk_buff *nfc_alloc_recv_skb(unsigned int size, gfp_t gfp) | |
3e256b8f LRV |
756 | { |
757 | struct sk_buff *skb; | |
758 | unsigned int total_size; | |
759 | ||
760 | total_size = size + 1; | |
761 | skb = alloc_skb(total_size, gfp); | |
762 | ||
763 | if (skb) | |
764 | skb_reserve(skb, 1); | |
765 | ||
766 | return skb; | |
767 | } | |
7c7cd3bf | 768 | EXPORT_SYMBOL(nfc_alloc_recv_skb); |
3e256b8f | 769 | |
4d12b8b1 LRV |
770 | /** |
771 | * nfc_targets_found - inform that targets were found | |
772 | * | |
773 | * @dev: The nfc device that found the targets | |
774 | * @targets: array of nfc targets found | |
775 | * @ntargets: targets array size | |
776 | * | |
777 | * The device driver must call this function when one or many nfc targets | |
778 | * are found. After calling this function, the device driver must stop | |
779 | * polling for targets. | |
d94f9c55 EL |
780 | * NOTE: This function can be called with targets=NULL and n_targets=0 to |
781 | * notify a driver error, meaning that the polling operation cannot complete. | |
d4ccb132 EL |
782 | * IMPORTANT: this function must not be called from an atomic context. |
783 | * In addition, it must also not be called from a context that would prevent | |
784 | * the NFC Core to call other nfc ops entry point concurrently. | |
4d12b8b1 | 785 | */ |
0a40acb2 SO |
786 | int nfc_targets_found(struct nfc_dev *dev, |
787 | struct nfc_target *targets, int n_targets) | |
4d12b8b1 | 788 | { |
c4fbb651 SO |
789 | int i; |
790 | ||
20c239c1 | 791 | pr_debug("dev_name=%s n_targets=%d\n", dev_name(&dev->dev), n_targets); |
4d12b8b1 | 792 | |
c4fbb651 | 793 | for (i = 0; i < n_targets; i++) |
01ae0eea | 794 | targets[i].idx = dev->target_next_idx++; |
c4fbb651 | 795 | |
d4ccb132 | 796 | device_lock(&dev->dev); |
4d12b8b1 | 797 | |
8668fdd6 EL |
798 | if (dev->polling == false) { |
799 | device_unlock(&dev->dev); | |
800 | return 0; | |
801 | } | |
802 | ||
803 | dev->polling = false; | |
804 | ||
4d12b8b1 LRV |
805 | dev->targets_generation++; |
806 | ||
807 | kfree(dev->targets); | |
d94f9c55 | 808 | dev->targets = NULL; |
4d12b8b1 | 809 | |
d94f9c55 EL |
810 | if (targets) { |
811 | dev->targets = kmemdup(targets, | |
812 | n_targets * sizeof(struct nfc_target), | |
813 | GFP_ATOMIC); | |
814 | ||
815 | if (!dev->targets) { | |
816 | dev->n_targets = 0; | |
817 | device_unlock(&dev->dev); | |
818 | return -ENOMEM; | |
819 | } | |
4d12b8b1 LRV |
820 | } |
821 | ||
822 | dev->n_targets = n_targets; | |
d4ccb132 | 823 | device_unlock(&dev->dev); |
4d12b8b1 LRV |
824 | |
825 | nfc_genl_targets_found(dev); | |
826 | ||
827 | return 0; | |
828 | } | |
829 | EXPORT_SYMBOL(nfc_targets_found); | |
830 | ||
d4ccb132 EL |
831 | /** |
832 | * nfc_target_lost - inform that an activated target went out of field | |
833 | * | |
834 | * @dev: The nfc device that had the activated target in field | |
835 | * @target_idx: the nfc index of the target | |
836 | * | |
837 | * The device driver must call this function when the activated target | |
838 | * goes out of the field. | |
839 | * IMPORTANT: this function must not be called from an atomic context. | |
840 | * In addition, it must also not be called from a context that would prevent | |
841 | * the NFC Core to call other nfc ops entry point concurrently. | |
842 | */ | |
e1da0efa EL |
843 | int nfc_target_lost(struct nfc_dev *dev, u32 target_idx) |
844 | { | |
845 | struct nfc_target *tg; | |
846 | int i; | |
847 | ||
848 | pr_debug("dev_name %s n_target %d\n", dev_name(&dev->dev), target_idx); | |
849 | ||
d4ccb132 | 850 | device_lock(&dev->dev); |
e1da0efa EL |
851 | |
852 | for (i = 0; i < dev->n_targets; i++) { | |
853 | tg = &dev->targets[i]; | |
854 | if (tg->idx == target_idx) | |
855 | break; | |
856 | } | |
857 | ||
858 | if (i == dev->n_targets) { | |
d4ccb132 | 859 | device_unlock(&dev->dev); |
e1da0efa EL |
860 | return -EINVAL; |
861 | } | |
862 | ||
863 | dev->targets_generation++; | |
864 | dev->n_targets--; | |
90099433 | 865 | dev->active_target = NULL; |
e1da0efa EL |
866 | |
867 | if (dev->n_targets) { | |
868 | memcpy(&dev->targets[i], &dev->targets[i + 1], | |
869 | (dev->n_targets - i) * sizeof(struct nfc_target)); | |
870 | } else { | |
871 | kfree(dev->targets); | |
872 | dev->targets = NULL; | |
873 | } | |
874 | ||
d4ccb132 | 875 | device_unlock(&dev->dev); |
e1da0efa EL |
876 | |
877 | nfc_genl_target_lost(dev, target_idx); | |
878 | ||
879 | return 0; | |
880 | } | |
881 | EXPORT_SYMBOL(nfc_target_lost); | |
882 | ||
9eb334ac | 883 | inline void nfc_driver_failure(struct nfc_dev *dev, int err) |
456411ca | 884 | { |
9eb334ac | 885 | nfc_targets_found(dev, NULL, 0); |
456411ca EL |
886 | } |
887 | EXPORT_SYMBOL(nfc_driver_failure); | |
888 | ||
fed7c25e SO |
889 | int nfc_add_se(struct nfc_dev *dev, u32 se_idx, u16 type) |
890 | { | |
c531c9ec | 891 | struct nfc_se *se; |
2757c372 | 892 | int rc; |
fed7c25e SO |
893 | |
894 | pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); | |
895 | ||
d8eb18ee | 896 | se = nfc_find_se(dev, se_idx); |
c531c9ec SO |
897 | if (se) |
898 | return -EALREADY; | |
fed7c25e SO |
899 | |
900 | se = kzalloc(sizeof(struct nfc_se), GFP_KERNEL); | |
901 | if (!se) | |
902 | return -ENOMEM; | |
903 | ||
904 | se->idx = se_idx; | |
905 | se->type = type; | |
906 | se->state = NFC_SE_DISABLED; | |
907 | INIT_LIST_HEAD(&se->list); | |
908 | ||
909 | list_add(&se->list, &dev->secure_elements); | |
910 | ||
2757c372 SO |
911 | rc = nfc_genl_se_added(dev, se_idx, type); |
912 | if (rc < 0) { | |
913 | list_del(&se->list); | |
914 | kfree(se); | |
915 | ||
916 | return rc; | |
917 | } | |
918 | ||
fed7c25e SO |
919 | return 0; |
920 | } | |
921 | EXPORT_SYMBOL(nfc_add_se); | |
922 | ||
923 | int nfc_remove_se(struct nfc_dev *dev, u32 se_idx) | |
924 | { | |
925 | struct nfc_se *se, *n; | |
2757c372 | 926 | int rc; |
fed7c25e SO |
927 | |
928 | pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); | |
929 | ||
930 | list_for_each_entry_safe(se, n, &dev->secure_elements, list) | |
931 | if (se->idx == se_idx) { | |
2757c372 SO |
932 | rc = nfc_genl_se_removed(dev, se_idx); |
933 | if (rc < 0) | |
934 | return rc; | |
935 | ||
fed7c25e SO |
936 | list_del(&se->list); |
937 | kfree(se); | |
938 | ||
939 | return 0; | |
940 | } | |
941 | ||
942 | return -EINVAL; | |
943 | } | |
944 | EXPORT_SYMBOL(nfc_remove_se); | |
945 | ||
3e256b8f LRV |
946 | static void nfc_release(struct device *d) |
947 | { | |
948 | struct nfc_dev *dev = to_nfc_dev(d); | |
ee656e9d | 949 | struct nfc_se *se, *n; |
3e256b8f | 950 | |
20c239c1 | 951 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
3e256b8f | 952 | |
4d12b8b1 LRV |
953 | nfc_genl_data_exit(&dev->genl_data); |
954 | kfree(dev->targets); | |
ee656e9d SO |
955 | |
956 | list_for_each_entry_safe(se, n, &dev->secure_elements, list) { | |
957 | nfc_genl_se_removed(dev, se->idx); | |
958 | list_del(&se->list); | |
959 | kfree(se); | |
960 | } | |
961 | ||
3e256b8f LRV |
962 | kfree(dev); |
963 | } | |
964 | ||
c8d56ae7 EL |
965 | static void nfc_check_pres_work(struct work_struct *work) |
966 | { | |
967 | struct nfc_dev *dev = container_of(work, struct nfc_dev, | |
968 | check_pres_work); | |
969 | int rc; | |
970 | ||
971 | device_lock(&dev->dev); | |
972 | ||
90099433 EL |
973 | if (dev->active_target && timer_pending(&dev->check_pres_timer) == 0) { |
974 | rc = dev->ops->check_presence(dev, dev->active_target); | |
632c016a EL |
975 | if (rc == -EOPNOTSUPP) |
976 | goto exit; | |
f0c91038 | 977 | if (rc) { |
d4ccb132 EL |
978 | u32 active_target_idx = dev->active_target->idx; |
979 | device_unlock(&dev->dev); | |
980 | nfc_target_lost(dev, active_target_idx); | |
981 | return; | |
c8d56ae7 | 982 | } |
f0c91038 EL |
983 | |
984 | if (!dev->shutting_down) | |
985 | mod_timer(&dev->check_pres_timer, jiffies + | |
986 | msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS)); | |
c8d56ae7 EL |
987 | } |
988 | ||
632c016a | 989 | exit: |
c8d56ae7 EL |
990 | device_unlock(&dev->dev); |
991 | } | |
992 | ||
993 | static void nfc_check_pres_timeout(unsigned long data) | |
994 | { | |
995 | struct nfc_dev *dev = (struct nfc_dev *)data; | |
996 | ||
916082b0 | 997 | schedule_work(&dev->check_pres_work); |
c8d56ae7 EL |
998 | } |
999 | ||
3e256b8f LRV |
1000 | struct class nfc_class = { |
1001 | .name = "nfc", | |
1002 | .dev_release = nfc_release, | |
1003 | }; | |
1004 | EXPORT_SYMBOL(nfc_class); | |
1005 | ||
9f3b795a | 1006 | static int match_idx(struct device *d, const void *data) |
3e256b8f LRV |
1007 | { |
1008 | struct nfc_dev *dev = to_nfc_dev(d); | |
9f3b795a | 1009 | const unsigned int *idx = data; |
3e256b8f LRV |
1010 | |
1011 | return dev->idx == *idx; | |
1012 | } | |
1013 | ||
95c96174 | 1014 | struct nfc_dev *nfc_get_device(unsigned int idx) |
3e256b8f LRV |
1015 | { |
1016 | struct device *d; | |
1017 | ||
1018 | d = class_find_device(&nfc_class, NULL, &idx, match_idx); | |
1019 | if (!d) | |
1020 | return NULL; | |
1021 | ||
1022 | return to_nfc_dev(d); | |
1023 | } | |
1024 | ||
1025 | /** | |
1026 | * nfc_allocate_device - allocate a new nfc device | |
1027 | * | |
1028 | * @ops: device operations | |
1029 | * @supported_protocols: NFC protocols supported by the device | |
1030 | */ | |
1031 | struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops, | |
0a40acb2 SO |
1032 | u32 supported_protocols, |
1033 | int tx_headroom, int tx_tailroom) | |
3e256b8f | 1034 | { |
3e256b8f LRV |
1035 | struct nfc_dev *dev; |
1036 | ||
1037 | if (!ops->start_poll || !ops->stop_poll || !ops->activate_target || | |
be9ae4ce | 1038 | !ops->deactivate_target || !ops->im_transceive) |
3e256b8f LRV |
1039 | return NULL; |
1040 | ||
1041 | if (!supported_protocols) | |
1042 | return NULL; | |
1043 | ||
1044 | dev = kzalloc(sizeof(struct nfc_dev), GFP_KERNEL); | |
1045 | if (!dev) | |
1046 | return NULL; | |
1047 | ||
3e256b8f LRV |
1048 | dev->ops = ops; |
1049 | dev->supported_protocols = supported_protocols; | |
e8753043 SO |
1050 | dev->tx_headroom = tx_headroom; |
1051 | dev->tx_tailroom = tx_tailroom; | |
fed7c25e | 1052 | INIT_LIST_HEAD(&dev->secure_elements); |
3e256b8f | 1053 | |
4d12b8b1 LRV |
1054 | nfc_genl_data_init(&dev->genl_data); |
1055 | ||
5bcf099c | 1056 | dev->rf_mode = NFC_RF_NONE; |
d4ccb132 | 1057 | |
4d12b8b1 LRV |
1058 | /* first generation must not be 0 */ |
1059 | dev->targets_generation = 1; | |
1060 | ||
c8d56ae7 | 1061 | if (ops->check_presence) { |
c8d56ae7 EL |
1062 | init_timer(&dev->check_pres_timer); |
1063 | dev->check_pres_timer.data = (unsigned long)dev; | |
1064 | dev->check_pres_timer.function = nfc_check_pres_timeout; | |
1065 | ||
1066 | INIT_WORK(&dev->check_pres_work, nfc_check_pres_work); | |
c8d56ae7 EL |
1067 | } |
1068 | ||
3e256b8f LRV |
1069 | return dev; |
1070 | } | |
1071 | EXPORT_SYMBOL(nfc_allocate_device); | |
1072 | ||
1073 | /** | |
1074 | * nfc_register_device - register a nfc device in the nfc subsystem | |
1075 | * | |
1076 | * @dev: The nfc device to register | |
1077 | */ | |
1078 | int nfc_register_device(struct nfc_dev *dev) | |
1079 | { | |
1080 | int rc; | |
1081 | ||
20c239c1 | 1082 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
3e256b8f | 1083 | |
7eda8b8e SO |
1084 | dev->idx = ida_simple_get(&nfc_index_ida, 0, 0, GFP_KERNEL); |
1085 | if (dev->idx < 0) | |
1086 | return dev->idx; | |
1087 | ||
1088 | dev->dev.class = &nfc_class; | |
1089 | dev_set_name(&dev->dev, "nfc%d", dev->idx); | |
1090 | device_initialize(&dev->dev); | |
1091 | ||
3e256b8f LRV |
1092 | mutex_lock(&nfc_devlist_mutex); |
1093 | nfc_devlist_generation++; | |
1094 | rc = device_add(&dev->dev); | |
1095 | mutex_unlock(&nfc_devlist_mutex); | |
1096 | ||
4d12b8b1 LRV |
1097 | if (rc < 0) |
1098 | return rc; | |
1099 | ||
d646960f SO |
1100 | rc = nfc_llcp_register_device(dev); |
1101 | if (rc) | |
1102 | pr_err("Could not register llcp device\n"); | |
1103 | ||
4d12b8b1 LRV |
1104 | rc = nfc_genl_device_added(dev); |
1105 | if (rc) | |
20c239c1 JP |
1106 | pr_debug("The userspace won't be notified that the device %s was added\n", |
1107 | dev_name(&dev->dev)); | |
4d12b8b1 | 1108 | |
be055b2f SO |
1109 | dev->rfkill = rfkill_alloc(dev_name(&dev->dev), &dev->dev, |
1110 | RFKILL_TYPE_NFC, &nfc_rfkill_ops, dev); | |
1111 | if (dev->rfkill) { | |
1112 | if (rfkill_register(dev->rfkill) < 0) { | |
1113 | rfkill_destroy(dev->rfkill); | |
1114 | dev->rfkill = NULL; | |
1115 | } | |
1116 | } | |
1117 | ||
4d12b8b1 | 1118 | return 0; |
3e256b8f LRV |
1119 | } |
1120 | EXPORT_SYMBOL(nfc_register_device); | |
1121 | ||
1122 | /** | |
1123 | * nfc_unregister_device - unregister a nfc device in the nfc subsystem | |
1124 | * | |
1125 | * @dev: The nfc device to unregister | |
1126 | */ | |
1127 | void nfc_unregister_device(struct nfc_dev *dev) | |
1128 | { | |
7eda8b8e | 1129 | int rc, id; |
4d12b8b1 | 1130 | |
20c239c1 | 1131 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
3e256b8f | 1132 | |
7eda8b8e SO |
1133 | id = dev->idx; |
1134 | ||
be055b2f SO |
1135 | if (dev->rfkill) { |
1136 | rfkill_unregister(dev->rfkill); | |
1137 | rfkill_destroy(dev->rfkill); | |
1138 | } | |
1139 | ||
f0c91038 EL |
1140 | if (dev->ops->check_presence) { |
1141 | device_lock(&dev->dev); | |
1142 | dev->shutting_down = true; | |
1143 | device_unlock(&dev->dev); | |
1144 | del_timer_sync(&dev->check_pres_timer); | |
1145 | cancel_work_sync(&dev->check_pres_work); | |
1146 | } | |
3e256b8f | 1147 | |
f0c91038 EL |
1148 | rc = nfc_genl_device_removed(dev); |
1149 | if (rc) | |
1150 | pr_debug("The userspace won't be notified that the device %s " | |
1151 | "was removed\n", dev_name(&dev->dev)); | |
4d12b8b1 | 1152 | |
d646960f SO |
1153 | nfc_llcp_unregister_device(dev); |
1154 | ||
f0c91038 EL |
1155 | mutex_lock(&nfc_devlist_mutex); |
1156 | nfc_devlist_generation++; | |
1157 | device_del(&dev->dev); | |
1158 | mutex_unlock(&nfc_devlist_mutex); | |
4d12b8b1 | 1159 | |
7eda8b8e | 1160 | ida_simple_remove(&nfc_index_ida, id); |
3e256b8f LRV |
1161 | } |
1162 | EXPORT_SYMBOL(nfc_unregister_device); | |
1163 | ||
1164 | static int __init nfc_init(void) | |
1165 | { | |
4d12b8b1 LRV |
1166 | int rc; |
1167 | ||
ed1e0ad8 | 1168 | pr_info("NFC Core ver %s\n", VERSION); |
3e256b8f | 1169 | |
4d12b8b1 LRV |
1170 | rc = class_register(&nfc_class); |
1171 | if (rc) | |
1172 | return rc; | |
1173 | ||
1174 | rc = nfc_genl_init(); | |
1175 | if (rc) | |
1176 | goto err_genl; | |
1177 | ||
1178 | /* the first generation must not be 0 */ | |
1179 | nfc_devlist_generation = 1; | |
1180 | ||
23b7869c LRV |
1181 | rc = rawsock_init(); |
1182 | if (rc) | |
1183 | goto err_rawsock; | |
1184 | ||
d646960f SO |
1185 | rc = nfc_llcp_init(); |
1186 | if (rc) | |
1187 | goto err_llcp_sock; | |
1188 | ||
c7fe3b52 AAJ |
1189 | rc = af_nfc_init(); |
1190 | if (rc) | |
1191 | goto err_af_nfc; | |
1192 | ||
4d12b8b1 LRV |
1193 | return 0; |
1194 | ||
c7fe3b52 | 1195 | err_af_nfc: |
d646960f SO |
1196 | nfc_llcp_exit(); |
1197 | err_llcp_sock: | |
23b7869c LRV |
1198 | rawsock_exit(); |
1199 | err_rawsock: | |
c7fe3b52 | 1200 | nfc_genl_exit(); |
4d12b8b1 LRV |
1201 | err_genl: |
1202 | class_unregister(&nfc_class); | |
1203 | return rc; | |
3e256b8f LRV |
1204 | } |
1205 | ||
1206 | static void __exit nfc_exit(void) | |
1207 | { | |
c7fe3b52 | 1208 | af_nfc_exit(); |
d646960f | 1209 | nfc_llcp_exit(); |
23b7869c | 1210 | rawsock_exit(); |
4d12b8b1 | 1211 | nfc_genl_exit(); |
3e256b8f LRV |
1212 | class_unregister(&nfc_class); |
1213 | } | |
1214 | ||
1215 | subsys_initcall(nfc_init); | |
1216 | module_exit(nfc_exit); | |
1217 | ||
1218 | MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>"); | |
1219 | MODULE_DESCRIPTION("NFC Core ver " VERSION); | |
1220 | MODULE_VERSION(VERSION); | |
1221 | MODULE_LICENSE("GPL"); | |
1155bb61 | 1222 | MODULE_ALIAS_NETPROTO(PF_NFC); |
5df16cad | 1223 | MODULE_ALIAS_GENL_FAMILY(NFC_GENL_NAME); |