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 | |
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 | 135 | /* We have to enable the device before discovering SEs */ |
a434c240 SO |
136 | if (dev->ops->discover_se && dev->ops->discover_se(dev)) |
137 | pr_err("SE discovery failed\n"); | |
0a946301 | 138 | |
8b3fe7b5 IE |
139 | error: |
140 | device_unlock(&dev->dev); | |
141 | return rc; | |
142 | } | |
143 | ||
144 | /** | |
145 | * nfc_dev_down - turn off the NFC device | |
146 | * | |
147 | * @dev: The nfc device to be turned off | |
148 | */ | |
149 | int nfc_dev_down(struct nfc_dev *dev) | |
150 | { | |
151 | int rc = 0; | |
152 | ||
20c239c1 | 153 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
8b3fe7b5 IE |
154 | |
155 | device_lock(&dev->dev); | |
156 | ||
157 | if (!device_is_registered(&dev->dev)) { | |
158 | rc = -ENODEV; | |
159 | goto error; | |
160 | } | |
161 | ||
162 | if (!dev->dev_up) { | |
163 | rc = -EALREADY; | |
164 | goto error; | |
165 | } | |
166 | ||
90099433 | 167 | if (dev->polling || dev->active_target) { |
8b3fe7b5 IE |
168 | rc = -EBUSY; |
169 | goto error; | |
170 | } | |
171 | ||
172 | if (dev->ops->dev_down) | |
173 | dev->ops->dev_down(dev); | |
174 | ||
175 | dev->dev_up = false; | |
176 | ||
177 | error: | |
178 | device_unlock(&dev->dev); | |
179 | return rc; | |
180 | } | |
181 | ||
be055b2f SO |
182 | static int nfc_rfkill_set_block(void *data, bool blocked) |
183 | { | |
184 | struct nfc_dev *dev = data; | |
185 | ||
186 | pr_debug("%s blocked %d", dev_name(&dev->dev), blocked); | |
187 | ||
188 | if (!blocked) | |
189 | return 0; | |
190 | ||
191 | nfc_dev_down(dev); | |
192 | ||
193 | return 0; | |
194 | } | |
195 | ||
196 | static const struct rfkill_ops nfc_rfkill_ops = { | |
197 | .set_block = nfc_rfkill_set_block, | |
198 | }; | |
199 | ||
3e256b8f LRV |
200 | /** |
201 | * nfc_start_poll - start polling for nfc targets | |
202 | * | |
203 | * @dev: The nfc device that must start polling | |
204 | * @protocols: bitset of nfc protocols that must be used for polling | |
205 | * | |
206 | * The device remains polling for targets until a target is found or | |
207 | * the nfc_stop_poll function is called. | |
208 | */ | |
fe7c5800 | 209 | int nfc_start_poll(struct nfc_dev *dev, u32 im_protocols, u32 tm_protocols) |
3e256b8f LRV |
210 | { |
211 | int rc; | |
212 | ||
fe7c5800 SO |
213 | pr_debug("dev_name %s initiator protocols 0x%x target protocols 0x%x\n", |
214 | dev_name(&dev->dev), im_protocols, tm_protocols); | |
3e256b8f | 215 | |
fe7c5800 | 216 | if (!im_protocols && !tm_protocols) |
3e256b8f LRV |
217 | return -EINVAL; |
218 | ||
219 | device_lock(&dev->dev); | |
220 | ||
221 | if (!device_is_registered(&dev->dev)) { | |
222 | rc = -ENODEV; | |
223 | goto error; | |
224 | } | |
225 | ||
7757dc8a SO |
226 | if (!dev->dev_up) { |
227 | rc = -ENODEV; | |
228 | goto error; | |
229 | } | |
230 | ||
3e256b8f LRV |
231 | if (dev->polling) { |
232 | rc = -EBUSY; | |
233 | goto error; | |
234 | } | |
235 | ||
fe7c5800 | 236 | rc = dev->ops->start_poll(dev, im_protocols, tm_protocols); |
f212ad5e | 237 | if (!rc) { |
3e256b8f | 238 | dev->polling = true; |
f212ad5e SO |
239 | dev->rf_mode = NFC_RF_NONE; |
240 | } | |
3e256b8f LRV |
241 | |
242 | error: | |
243 | device_unlock(&dev->dev); | |
244 | return rc; | |
245 | } | |
246 | ||
247 | /** | |
248 | * nfc_stop_poll - stop polling for nfc targets | |
249 | * | |
250 | * @dev: The nfc device that must stop polling | |
251 | */ | |
252 | int nfc_stop_poll(struct nfc_dev *dev) | |
253 | { | |
254 | int rc = 0; | |
255 | ||
20c239c1 | 256 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
3e256b8f LRV |
257 | |
258 | device_lock(&dev->dev); | |
259 | ||
260 | if (!device_is_registered(&dev->dev)) { | |
261 | rc = -ENODEV; | |
262 | goto error; | |
263 | } | |
264 | ||
265 | if (!dev->polling) { | |
266 | rc = -EINVAL; | |
267 | goto error; | |
268 | } | |
269 | ||
270 | dev->ops->stop_poll(dev); | |
271 | dev->polling = false; | |
5bcf099c | 272 | dev->rf_mode = NFC_RF_NONE; |
3e256b8f LRV |
273 | |
274 | error: | |
275 | device_unlock(&dev->dev); | |
276 | return rc; | |
277 | } | |
278 | ||
90099433 EL |
279 | static struct nfc_target *nfc_find_target(struct nfc_dev *dev, u32 target_idx) |
280 | { | |
281 | int i; | |
282 | ||
283 | if (dev->n_targets == 0) | |
284 | return NULL; | |
285 | ||
0f450772 | 286 | for (i = 0; i < dev->n_targets; i++) { |
90099433 EL |
287 | if (dev->targets[i].idx == target_idx) |
288 | return &dev->targets[i]; | |
289 | } | |
290 | ||
291 | return NULL; | |
292 | } | |
293 | ||
47807d3d | 294 | int nfc_dep_link_up(struct nfc_dev *dev, int target_index, u8 comm_mode) |
1ed28f61 SO |
295 | { |
296 | int rc = 0; | |
47807d3d SO |
297 | u8 *gb; |
298 | size_t gb_len; | |
90099433 | 299 | struct nfc_target *target; |
1ed28f61 | 300 | |
47807d3d | 301 | pr_debug("dev_name=%s comm %d\n", dev_name(&dev->dev), comm_mode); |
1ed28f61 SO |
302 | |
303 | if (!dev->ops->dep_link_up) | |
304 | return -EOPNOTSUPP; | |
305 | ||
306 | device_lock(&dev->dev); | |
307 | ||
308 | if (!device_is_registered(&dev->dev)) { | |
309 | rc = -ENODEV; | |
310 | goto error; | |
311 | } | |
312 | ||
313 | if (dev->dep_link_up == true) { | |
314 | rc = -EALREADY; | |
315 | goto error; | |
316 | } | |
317 | ||
47807d3d SO |
318 | gb = nfc_llcp_general_bytes(dev, &gb_len); |
319 | if (gb_len > NFC_MAX_GT_LEN) { | |
320 | rc = -EINVAL; | |
321 | goto error; | |
322 | } | |
323 | ||
90099433 EL |
324 | target = nfc_find_target(dev, target_index); |
325 | if (target == NULL) { | |
326 | rc = -ENOTCONN; | |
327 | goto error; | |
328 | } | |
329 | ||
330 | rc = dev->ops->dep_link_up(dev, target, comm_mode, gb, gb_len); | |
f212ad5e | 331 | if (!rc) { |
90099433 | 332 | dev->active_target = target; |
f212ad5e SO |
333 | dev->rf_mode = NFC_RF_INITIATOR; |
334 | } | |
1ed28f61 SO |
335 | |
336 | error: | |
337 | device_unlock(&dev->dev); | |
338 | return rc; | |
339 | } | |
340 | ||
341 | int nfc_dep_link_down(struct nfc_dev *dev) | |
342 | { | |
343 | int rc = 0; | |
344 | ||
345 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); | |
346 | ||
347 | if (!dev->ops->dep_link_down) | |
348 | return -EOPNOTSUPP; | |
349 | ||
350 | device_lock(&dev->dev); | |
351 | ||
352 | if (!device_is_registered(&dev->dev)) { | |
353 | rc = -ENODEV; | |
354 | goto error; | |
355 | } | |
356 | ||
357 | if (dev->dep_link_up == false) { | |
358 | rc = -EALREADY; | |
359 | goto error; | |
360 | } | |
361 | ||
1ed28f61 SO |
362 | rc = dev->ops->dep_link_down(dev); |
363 | if (!rc) { | |
364 | dev->dep_link_up = false; | |
90099433 | 365 | dev->active_target = NULL; |
5bcf099c | 366 | dev->rf_mode = NFC_RF_NONE; |
d646960f | 367 | nfc_llcp_mac_is_down(dev); |
1ed28f61 SO |
368 | nfc_genl_dep_link_down_event(dev); |
369 | } | |
370 | ||
371 | error: | |
372 | device_unlock(&dev->dev); | |
5bcf099c | 373 | |
1ed28f61 SO |
374 | return rc; |
375 | } | |
376 | ||
377 | int nfc_dep_link_is_up(struct nfc_dev *dev, u32 target_idx, | |
0a40acb2 | 378 | u8 comm_mode, u8 rf_mode) |
1ed28f61 SO |
379 | { |
380 | dev->dep_link_up = true; | |
1ed28f61 | 381 | |
d31652a2 | 382 | if (!dev->active_target && rf_mode == NFC_RF_INITIATOR) { |
e29a9e2a SO |
383 | struct nfc_target *target; |
384 | ||
385 | target = nfc_find_target(dev, target_idx); | |
386 | if (target == NULL) | |
387 | return -ENOTCONN; | |
388 | ||
389 | dev->active_target = target; | |
390 | } | |
391 | ||
392 | dev->polling = false; | |
393 | dev->rf_mode = rf_mode; | |
394 | ||
d646960f SO |
395 | nfc_llcp_mac_is_up(dev, target_idx, comm_mode, rf_mode); |
396 | ||
1ed28f61 SO |
397 | return nfc_genl_dep_link_up_event(dev, target_idx, comm_mode, rf_mode); |
398 | } | |
399 | EXPORT_SYMBOL(nfc_dep_link_is_up); | |
400 | ||
3e256b8f LRV |
401 | /** |
402 | * nfc_activate_target - prepare the target for data exchange | |
403 | * | |
404 | * @dev: The nfc device that found the target | |
405 | * @target_idx: index of the target that must be activated | |
406 | * @protocol: nfc protocol that will be used for data exchange | |
407 | */ | |
408 | int nfc_activate_target(struct nfc_dev *dev, u32 target_idx, u32 protocol) | |
409 | { | |
410 | int rc; | |
90099433 | 411 | struct nfc_target *target; |
3e256b8f | 412 | |
20c239c1 JP |
413 | pr_debug("dev_name=%s target_idx=%u protocol=%u\n", |
414 | dev_name(&dev->dev), target_idx, protocol); | |
3e256b8f LRV |
415 | |
416 | device_lock(&dev->dev); | |
417 | ||
418 | if (!device_is_registered(&dev->dev)) { | |
419 | rc = -ENODEV; | |
420 | goto error; | |
421 | } | |
422 | ||
90099433 EL |
423 | if (dev->active_target) { |
424 | rc = -EBUSY; | |
425 | goto error; | |
426 | } | |
427 | ||
428 | target = nfc_find_target(dev, target_idx); | |
429 | if (target == NULL) { | |
430 | rc = -ENOTCONN; | |
431 | goto error; | |
432 | } | |
433 | ||
434 | rc = dev->ops->activate_target(dev, target, protocol); | |
c8d56ae7 | 435 | if (!rc) { |
90099433 | 436 | dev->active_target = target; |
f212ad5e | 437 | dev->rf_mode = NFC_RF_INITIATOR; |
3e256b8f | 438 | |
f0c91038 | 439 | if (dev->ops->check_presence && !dev->shutting_down) |
c8d56ae7 EL |
440 | mod_timer(&dev->check_pres_timer, jiffies + |
441 | msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS)); | |
442 | } | |
3e256b8f LRV |
443 | |
444 | error: | |
445 | device_unlock(&dev->dev); | |
446 | return rc; | |
447 | } | |
448 | ||
449 | /** | |
450 | * nfc_deactivate_target - deactivate a nfc target | |
451 | * | |
452 | * @dev: The nfc device that found the target | |
453 | * @target_idx: index of the target that must be deactivated | |
454 | */ | |
455 | int nfc_deactivate_target(struct nfc_dev *dev, u32 target_idx) | |
456 | { | |
457 | int rc = 0; | |
458 | ||
20c239c1 JP |
459 | pr_debug("dev_name=%s target_idx=%u\n", |
460 | dev_name(&dev->dev), target_idx); | |
3e256b8f LRV |
461 | |
462 | device_lock(&dev->dev); | |
463 | ||
464 | if (!device_is_registered(&dev->dev)) { | |
465 | rc = -ENODEV; | |
466 | goto error; | |
467 | } | |
468 | ||
90099433 EL |
469 | if (dev->active_target == NULL) { |
470 | rc = -ENOTCONN; | |
471 | goto error; | |
472 | } | |
473 | ||
474 | if (dev->active_target->idx != target_idx) { | |
475 | rc = -ENOTCONN; | |
476 | goto error; | |
477 | } | |
478 | ||
c8d56ae7 EL |
479 | if (dev->ops->check_presence) |
480 | del_timer_sync(&dev->check_pres_timer); | |
481 | ||
90099433 EL |
482 | dev->ops->deactivate_target(dev, dev->active_target); |
483 | dev->active_target = NULL; | |
3e256b8f LRV |
484 | |
485 | error: | |
486 | device_unlock(&dev->dev); | |
487 | return rc; | |
488 | } | |
489 | ||
490 | /** | |
491 | * nfc_data_exchange - transceive data | |
492 | * | |
493 | * @dev: The nfc device that found the target | |
494 | * @target_idx: index of the target | |
495 | * @skb: data to be sent | |
496 | * @cb: callback called when the response is received | |
497 | * @cb_context: parameter for the callback function | |
498 | * | |
499 | * The user must wait for the callback before calling this function again. | |
500 | */ | |
0a40acb2 SO |
501 | int nfc_data_exchange(struct nfc_dev *dev, u32 target_idx, struct sk_buff *skb, |
502 | data_exchange_cb_t cb, void *cb_context) | |
3e256b8f LRV |
503 | { |
504 | int rc; | |
505 | ||
20c239c1 JP |
506 | pr_debug("dev_name=%s target_idx=%u skb->len=%u\n", |
507 | dev_name(&dev->dev), target_idx, skb->len); | |
3e256b8f LRV |
508 | |
509 | device_lock(&dev->dev); | |
510 | ||
511 | if (!device_is_registered(&dev->dev)) { | |
512 | rc = -ENODEV; | |
513 | kfree_skb(skb); | |
514 | goto error; | |
515 | } | |
516 | ||
be9ae4ce SO |
517 | if (dev->rf_mode == NFC_RF_INITIATOR && dev->active_target != NULL) { |
518 | if (dev->active_target->idx != target_idx) { | |
519 | rc = -EADDRNOTAVAIL; | |
520 | kfree_skb(skb); | |
521 | goto error; | |
522 | } | |
144612ca | 523 | |
be9ae4ce SO |
524 | if (dev->ops->check_presence) |
525 | del_timer_sync(&dev->check_pres_timer); | |
526 | ||
527 | rc = dev->ops->im_transceive(dev, dev->active_target, skb, cb, | |
528 | cb_context); | |
529 | ||
f0c91038 | 530 | if (!rc && dev->ops->check_presence && !dev->shutting_down) |
be9ae4ce SO |
531 | mod_timer(&dev->check_pres_timer, jiffies + |
532 | msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS)); | |
533 | } else if (dev->rf_mode == NFC_RF_TARGET && dev->ops->tm_send != NULL) { | |
534 | rc = dev->ops->tm_send(dev, skb); | |
535 | } else { | |
536 | rc = -ENOTCONN; | |
144612ca EL |
537 | kfree_skb(skb); |
538 | goto error; | |
539 | } | |
540 | ||
c8d56ae7 | 541 | |
3e256b8f LRV |
542 | error: |
543 | device_unlock(&dev->dev); | |
544 | return rc; | |
545 | } | |
546 | ||
d8eb18ee | 547 | struct nfc_se *nfc_find_se(struct nfc_dev *dev, u32 se_idx) |
c531c9ec SO |
548 | { |
549 | struct nfc_se *se, *n; | |
550 | ||
551 | list_for_each_entry_safe(se, n, &dev->secure_elements, list) | |
552 | if (se->idx == se_idx) | |
553 | return se; | |
554 | ||
555 | return NULL; | |
556 | } | |
d8eb18ee | 557 | EXPORT_SYMBOL(nfc_find_se); |
c531c9ec SO |
558 | |
559 | int nfc_enable_se(struct nfc_dev *dev, u32 se_idx) | |
560 | { | |
561 | ||
562 | struct nfc_se *se; | |
563 | int rc; | |
564 | ||
565 | pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); | |
566 | ||
567 | device_lock(&dev->dev); | |
568 | ||
569 | if (!device_is_registered(&dev->dev)) { | |
570 | rc = -ENODEV; | |
571 | goto error; | |
572 | } | |
573 | ||
574 | if (!dev->dev_up) { | |
575 | rc = -ENODEV; | |
576 | goto error; | |
577 | } | |
578 | ||
579 | if (dev->polling) { | |
580 | rc = -EBUSY; | |
581 | goto error; | |
582 | } | |
583 | ||
584 | if (!dev->ops->enable_se || !dev->ops->disable_se) { | |
585 | rc = -EOPNOTSUPP; | |
586 | goto error; | |
587 | } | |
588 | ||
d8eb18ee | 589 | se = nfc_find_se(dev, se_idx); |
c531c9ec SO |
590 | if (!se) { |
591 | rc = -EINVAL; | |
592 | goto error; | |
593 | } | |
594 | ||
2c383283 | 595 | if (se->state == NFC_SE_ENABLED) { |
c531c9ec SO |
596 | rc = -EALREADY; |
597 | goto error; | |
598 | } | |
599 | ||
600 | rc = dev->ops->enable_se(dev, se_idx); | |
39525ee1 AW |
601 | if (rc >= 0) |
602 | se->state = NFC_SE_ENABLED; | |
c531c9ec SO |
603 | |
604 | error: | |
605 | device_unlock(&dev->dev); | |
606 | return rc; | |
607 | } | |
608 | ||
609 | int nfc_disable_se(struct nfc_dev *dev, u32 se_idx) | |
610 | { | |
611 | ||
612 | struct nfc_se *se; | |
613 | int rc; | |
614 | ||
615 | pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); | |
616 | ||
617 | device_lock(&dev->dev); | |
618 | ||
619 | if (!device_is_registered(&dev->dev)) { | |
620 | rc = -ENODEV; | |
621 | goto error; | |
622 | } | |
623 | ||
624 | if (!dev->dev_up) { | |
625 | rc = -ENODEV; | |
626 | goto error; | |
627 | } | |
628 | ||
629 | if (!dev->ops->enable_se || !dev->ops->disable_se) { | |
630 | rc = -EOPNOTSUPP; | |
631 | goto error; | |
632 | } | |
633 | ||
d8eb18ee | 634 | se = nfc_find_se(dev, se_idx); |
c531c9ec SO |
635 | if (!se) { |
636 | rc = -EINVAL; | |
637 | goto error; | |
638 | } | |
639 | ||
2c383283 | 640 | if (se->state == NFC_SE_DISABLED) { |
c531c9ec SO |
641 | rc = -EALREADY; |
642 | goto error; | |
643 | } | |
644 | ||
645 | rc = dev->ops->disable_se(dev, se_idx); | |
39525ee1 AW |
646 | if (rc >= 0) |
647 | se->state = NFC_SE_DISABLED; | |
c531c9ec SO |
648 | |
649 | error: | |
650 | device_unlock(&dev->dev); | |
651 | return rc; | |
652 | } | |
653 | ||
541d920b SO |
654 | int nfc_set_remote_general_bytes(struct nfc_dev *dev, u8 *gb, u8 gb_len) |
655 | { | |
0a40acb2 | 656 | pr_debug("dev_name=%s gb_len=%d\n", dev_name(&dev->dev), gb_len); |
541d920b SO |
657 | |
658 | if (gb_len > NFC_MAX_GT_LEN) | |
659 | return -EINVAL; | |
660 | ||
d646960f | 661 | return nfc_llcp_set_remote_gb(dev, gb, gb_len); |
541d920b SO |
662 | } |
663 | EXPORT_SYMBOL(nfc_set_remote_general_bytes); | |
664 | ||
ab73b751 SO |
665 | u8 *nfc_get_local_general_bytes(struct nfc_dev *dev, size_t *gb_len) |
666 | { | |
667 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); | |
668 | ||
669 | return nfc_llcp_general_bytes(dev, gb_len); | |
670 | } | |
671 | EXPORT_SYMBOL(nfc_get_local_general_bytes); | |
672 | ||
73167ced SO |
673 | int nfc_tm_data_received(struct nfc_dev *dev, struct sk_buff *skb) |
674 | { | |
675 | /* Only LLCP target mode for now */ | |
676 | if (dev->dep_link_up == false) { | |
677 | kfree_skb(skb); | |
678 | return -ENOLINK; | |
679 | } | |
680 | ||
681 | return nfc_llcp_data_received(dev, skb); | |
682 | } | |
683 | EXPORT_SYMBOL(nfc_tm_data_received); | |
684 | ||
fc40a8c1 SO |
685 | int nfc_tm_activated(struct nfc_dev *dev, u32 protocol, u8 comm_mode, |
686 | u8 *gb, size_t gb_len) | |
687 | { | |
688 | int rc; | |
689 | ||
690 | device_lock(&dev->dev); | |
691 | ||
692 | dev->polling = false; | |
693 | ||
694 | if (gb != NULL) { | |
695 | rc = nfc_set_remote_general_bytes(dev, gb, gb_len); | |
696 | if (rc < 0) | |
697 | goto out; | |
698 | } | |
699 | ||
f212ad5e SO |
700 | dev->rf_mode = NFC_RF_TARGET; |
701 | ||
fc40a8c1 SO |
702 | if (protocol == NFC_PROTO_NFC_DEP_MASK) |
703 | nfc_dep_link_is_up(dev, 0, comm_mode, NFC_RF_TARGET); | |
704 | ||
705 | rc = nfc_genl_tm_activated(dev, protocol); | |
706 | ||
707 | out: | |
708 | device_unlock(&dev->dev); | |
709 | ||
710 | return rc; | |
711 | } | |
712 | EXPORT_SYMBOL(nfc_tm_activated); | |
713 | ||
714 | int nfc_tm_deactivated(struct nfc_dev *dev) | |
715 | { | |
716 | dev->dep_link_up = false; | |
5bcf099c | 717 | dev->rf_mode = NFC_RF_NONE; |
fc40a8c1 SO |
718 | |
719 | return nfc_genl_tm_deactivated(dev); | |
720 | } | |
721 | EXPORT_SYMBOL(nfc_tm_deactivated); | |
722 | ||
3e256b8f | 723 | /** |
7c7cd3bf | 724 | * nfc_alloc_send_skb - allocate a skb for data exchange responses |
3e256b8f LRV |
725 | * |
726 | * @size: size to allocate | |
727 | * @gfp: gfp flags | |
728 | */ | |
7c7cd3bf | 729 | struct sk_buff *nfc_alloc_send_skb(struct nfc_dev *dev, struct sock *sk, |
0a40acb2 SO |
730 | unsigned int flags, unsigned int size, |
731 | unsigned int *err) | |
7c7cd3bf SO |
732 | { |
733 | struct sk_buff *skb; | |
734 | unsigned int total_size; | |
735 | ||
736 | total_size = size + | |
737 | dev->tx_headroom + dev->tx_tailroom + NFC_HEADER_SIZE; | |
738 | ||
739 | skb = sock_alloc_send_skb(sk, total_size, flags & MSG_DONTWAIT, err); | |
740 | if (skb) | |
741 | skb_reserve(skb, dev->tx_headroom + NFC_HEADER_SIZE); | |
742 | ||
743 | return skb; | |
744 | } | |
745 | ||
746 | /** | |
747 | * nfc_alloc_recv_skb - allocate a skb for data exchange responses | |
748 | * | |
749 | * @size: size to allocate | |
750 | * @gfp: gfp flags | |
751 | */ | |
752 | struct sk_buff *nfc_alloc_recv_skb(unsigned int size, gfp_t gfp) | |
3e256b8f LRV |
753 | { |
754 | struct sk_buff *skb; | |
755 | unsigned int total_size; | |
756 | ||
757 | total_size = size + 1; | |
758 | skb = alloc_skb(total_size, gfp); | |
759 | ||
760 | if (skb) | |
761 | skb_reserve(skb, 1); | |
762 | ||
763 | return skb; | |
764 | } | |
7c7cd3bf | 765 | EXPORT_SYMBOL(nfc_alloc_recv_skb); |
3e256b8f | 766 | |
4d12b8b1 LRV |
767 | /** |
768 | * nfc_targets_found - inform that targets were found | |
769 | * | |
770 | * @dev: The nfc device that found the targets | |
771 | * @targets: array of nfc targets found | |
772 | * @ntargets: targets array size | |
773 | * | |
774 | * The device driver must call this function when one or many nfc targets | |
775 | * are found. After calling this function, the device driver must stop | |
776 | * polling for targets. | |
d94f9c55 EL |
777 | * NOTE: This function can be called with targets=NULL and n_targets=0 to |
778 | * notify a driver error, meaning that the polling operation cannot complete. | |
d4ccb132 EL |
779 | * IMPORTANT: this function must not be called from an atomic context. |
780 | * In addition, it must also not be called from a context that would prevent | |
781 | * the NFC Core to call other nfc ops entry point concurrently. | |
4d12b8b1 | 782 | */ |
0a40acb2 SO |
783 | int nfc_targets_found(struct nfc_dev *dev, |
784 | struct nfc_target *targets, int n_targets) | |
4d12b8b1 | 785 | { |
c4fbb651 SO |
786 | int i; |
787 | ||
20c239c1 | 788 | pr_debug("dev_name=%s n_targets=%d\n", dev_name(&dev->dev), n_targets); |
4d12b8b1 | 789 | |
c4fbb651 | 790 | for (i = 0; i < n_targets; i++) |
01ae0eea | 791 | targets[i].idx = dev->target_next_idx++; |
c4fbb651 | 792 | |
d4ccb132 | 793 | device_lock(&dev->dev); |
4d12b8b1 | 794 | |
8668fdd6 EL |
795 | if (dev->polling == false) { |
796 | device_unlock(&dev->dev); | |
797 | return 0; | |
798 | } | |
799 | ||
800 | dev->polling = false; | |
801 | ||
4d12b8b1 LRV |
802 | dev->targets_generation++; |
803 | ||
804 | kfree(dev->targets); | |
d94f9c55 | 805 | dev->targets = NULL; |
4d12b8b1 | 806 | |
d94f9c55 EL |
807 | if (targets) { |
808 | dev->targets = kmemdup(targets, | |
809 | n_targets * sizeof(struct nfc_target), | |
810 | GFP_ATOMIC); | |
811 | ||
812 | if (!dev->targets) { | |
813 | dev->n_targets = 0; | |
814 | device_unlock(&dev->dev); | |
815 | return -ENOMEM; | |
816 | } | |
4d12b8b1 LRV |
817 | } |
818 | ||
819 | dev->n_targets = n_targets; | |
d4ccb132 | 820 | device_unlock(&dev->dev); |
4d12b8b1 LRV |
821 | |
822 | nfc_genl_targets_found(dev); | |
823 | ||
824 | return 0; | |
825 | } | |
826 | EXPORT_SYMBOL(nfc_targets_found); | |
827 | ||
d4ccb132 EL |
828 | /** |
829 | * nfc_target_lost - inform that an activated target went out of field | |
830 | * | |
831 | * @dev: The nfc device that had the activated target in field | |
832 | * @target_idx: the nfc index of the target | |
833 | * | |
834 | * The device driver must call this function when the activated target | |
835 | * goes out of the field. | |
836 | * IMPORTANT: this function must not be called from an atomic context. | |
837 | * In addition, it must also not be called from a context that would prevent | |
838 | * the NFC Core to call other nfc ops entry point concurrently. | |
839 | */ | |
e1da0efa EL |
840 | int nfc_target_lost(struct nfc_dev *dev, u32 target_idx) |
841 | { | |
842 | struct nfc_target *tg; | |
843 | int i; | |
844 | ||
845 | pr_debug("dev_name %s n_target %d\n", dev_name(&dev->dev), target_idx); | |
846 | ||
d4ccb132 | 847 | device_lock(&dev->dev); |
e1da0efa EL |
848 | |
849 | for (i = 0; i < dev->n_targets; i++) { | |
850 | tg = &dev->targets[i]; | |
851 | if (tg->idx == target_idx) | |
852 | break; | |
853 | } | |
854 | ||
855 | if (i == dev->n_targets) { | |
d4ccb132 | 856 | device_unlock(&dev->dev); |
e1da0efa EL |
857 | return -EINVAL; |
858 | } | |
859 | ||
860 | dev->targets_generation++; | |
861 | dev->n_targets--; | |
90099433 | 862 | dev->active_target = NULL; |
e1da0efa EL |
863 | |
864 | if (dev->n_targets) { | |
865 | memcpy(&dev->targets[i], &dev->targets[i + 1], | |
866 | (dev->n_targets - i) * sizeof(struct nfc_target)); | |
867 | } else { | |
868 | kfree(dev->targets); | |
869 | dev->targets = NULL; | |
870 | } | |
871 | ||
d4ccb132 | 872 | device_unlock(&dev->dev); |
e1da0efa EL |
873 | |
874 | nfc_genl_target_lost(dev, target_idx); | |
875 | ||
876 | return 0; | |
877 | } | |
878 | EXPORT_SYMBOL(nfc_target_lost); | |
879 | ||
9eb334ac | 880 | inline void nfc_driver_failure(struct nfc_dev *dev, int err) |
456411ca | 881 | { |
9eb334ac | 882 | nfc_targets_found(dev, NULL, 0); |
456411ca EL |
883 | } |
884 | EXPORT_SYMBOL(nfc_driver_failure); | |
885 | ||
fed7c25e SO |
886 | int nfc_add_se(struct nfc_dev *dev, u32 se_idx, u16 type) |
887 | { | |
c531c9ec | 888 | struct nfc_se *se; |
2757c372 | 889 | int rc; |
fed7c25e SO |
890 | |
891 | pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); | |
892 | ||
d8eb18ee | 893 | se = nfc_find_se(dev, se_idx); |
c531c9ec SO |
894 | if (se) |
895 | return -EALREADY; | |
fed7c25e SO |
896 | |
897 | se = kzalloc(sizeof(struct nfc_se), GFP_KERNEL); | |
898 | if (!se) | |
899 | return -ENOMEM; | |
900 | ||
901 | se->idx = se_idx; | |
902 | se->type = type; | |
903 | se->state = NFC_SE_DISABLED; | |
904 | INIT_LIST_HEAD(&se->list); | |
905 | ||
906 | list_add(&se->list, &dev->secure_elements); | |
907 | ||
2757c372 SO |
908 | rc = nfc_genl_se_added(dev, se_idx, type); |
909 | if (rc < 0) { | |
910 | list_del(&se->list); | |
911 | kfree(se); | |
912 | ||
913 | return rc; | |
914 | } | |
915 | ||
fed7c25e SO |
916 | return 0; |
917 | } | |
918 | EXPORT_SYMBOL(nfc_add_se); | |
919 | ||
920 | int nfc_remove_se(struct nfc_dev *dev, u32 se_idx) | |
921 | { | |
922 | struct nfc_se *se, *n; | |
2757c372 | 923 | int rc; |
fed7c25e SO |
924 | |
925 | pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); | |
926 | ||
927 | list_for_each_entry_safe(se, n, &dev->secure_elements, list) | |
928 | if (se->idx == se_idx) { | |
2757c372 SO |
929 | rc = nfc_genl_se_removed(dev, se_idx); |
930 | if (rc < 0) | |
931 | return rc; | |
932 | ||
fed7c25e SO |
933 | list_del(&se->list); |
934 | kfree(se); | |
935 | ||
936 | return 0; | |
937 | } | |
938 | ||
939 | return -EINVAL; | |
940 | } | |
941 | EXPORT_SYMBOL(nfc_remove_se); | |
942 | ||
3e256b8f LRV |
943 | static void nfc_release(struct device *d) |
944 | { | |
945 | struct nfc_dev *dev = to_nfc_dev(d); | |
ee656e9d | 946 | struct nfc_se *se, *n; |
3e256b8f | 947 | |
20c239c1 | 948 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
3e256b8f | 949 | |
4d12b8b1 LRV |
950 | nfc_genl_data_exit(&dev->genl_data); |
951 | kfree(dev->targets); | |
ee656e9d SO |
952 | |
953 | list_for_each_entry_safe(se, n, &dev->secure_elements, list) { | |
954 | nfc_genl_se_removed(dev, se->idx); | |
955 | list_del(&se->list); | |
956 | kfree(se); | |
957 | } | |
958 | ||
3e256b8f LRV |
959 | kfree(dev); |
960 | } | |
961 | ||
c8d56ae7 EL |
962 | static void nfc_check_pres_work(struct work_struct *work) |
963 | { | |
964 | struct nfc_dev *dev = container_of(work, struct nfc_dev, | |
965 | check_pres_work); | |
966 | int rc; | |
967 | ||
968 | device_lock(&dev->dev); | |
969 | ||
90099433 EL |
970 | if (dev->active_target && timer_pending(&dev->check_pres_timer) == 0) { |
971 | rc = dev->ops->check_presence(dev, dev->active_target); | |
632c016a EL |
972 | if (rc == -EOPNOTSUPP) |
973 | goto exit; | |
f0c91038 | 974 | if (rc) { |
d4ccb132 EL |
975 | u32 active_target_idx = dev->active_target->idx; |
976 | device_unlock(&dev->dev); | |
977 | nfc_target_lost(dev, active_target_idx); | |
978 | return; | |
c8d56ae7 | 979 | } |
f0c91038 EL |
980 | |
981 | if (!dev->shutting_down) | |
982 | mod_timer(&dev->check_pres_timer, jiffies + | |
983 | msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS)); | |
c8d56ae7 EL |
984 | } |
985 | ||
632c016a | 986 | exit: |
c8d56ae7 EL |
987 | device_unlock(&dev->dev); |
988 | } | |
989 | ||
990 | static void nfc_check_pres_timeout(unsigned long data) | |
991 | { | |
992 | struct nfc_dev *dev = (struct nfc_dev *)data; | |
993 | ||
916082b0 | 994 | schedule_work(&dev->check_pres_work); |
c8d56ae7 EL |
995 | } |
996 | ||
3e256b8f LRV |
997 | struct class nfc_class = { |
998 | .name = "nfc", | |
999 | .dev_release = nfc_release, | |
1000 | }; | |
1001 | EXPORT_SYMBOL(nfc_class); | |
1002 | ||
9f3b795a | 1003 | static int match_idx(struct device *d, const void *data) |
3e256b8f LRV |
1004 | { |
1005 | struct nfc_dev *dev = to_nfc_dev(d); | |
9f3b795a | 1006 | const unsigned int *idx = data; |
3e256b8f LRV |
1007 | |
1008 | return dev->idx == *idx; | |
1009 | } | |
1010 | ||
95c96174 | 1011 | struct nfc_dev *nfc_get_device(unsigned int idx) |
3e256b8f LRV |
1012 | { |
1013 | struct device *d; | |
1014 | ||
1015 | d = class_find_device(&nfc_class, NULL, &idx, match_idx); | |
1016 | if (!d) | |
1017 | return NULL; | |
1018 | ||
1019 | return to_nfc_dev(d); | |
1020 | } | |
1021 | ||
1022 | /** | |
1023 | * nfc_allocate_device - allocate a new nfc device | |
1024 | * | |
1025 | * @ops: device operations | |
1026 | * @supported_protocols: NFC protocols supported by the device | |
1027 | */ | |
1028 | struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops, | |
0a40acb2 SO |
1029 | u32 supported_protocols, |
1030 | int tx_headroom, int tx_tailroom) | |
3e256b8f | 1031 | { |
3e256b8f LRV |
1032 | struct nfc_dev *dev; |
1033 | ||
1034 | if (!ops->start_poll || !ops->stop_poll || !ops->activate_target || | |
be9ae4ce | 1035 | !ops->deactivate_target || !ops->im_transceive) |
3e256b8f LRV |
1036 | return NULL; |
1037 | ||
1038 | if (!supported_protocols) | |
1039 | return NULL; | |
1040 | ||
1041 | dev = kzalloc(sizeof(struct nfc_dev), GFP_KERNEL); | |
1042 | if (!dev) | |
1043 | return NULL; | |
1044 | ||
3e256b8f LRV |
1045 | dev->ops = ops; |
1046 | dev->supported_protocols = supported_protocols; | |
e8753043 SO |
1047 | dev->tx_headroom = tx_headroom; |
1048 | dev->tx_tailroom = tx_tailroom; | |
fed7c25e | 1049 | INIT_LIST_HEAD(&dev->secure_elements); |
3e256b8f | 1050 | |
4d12b8b1 LRV |
1051 | nfc_genl_data_init(&dev->genl_data); |
1052 | ||
5bcf099c | 1053 | dev->rf_mode = NFC_RF_NONE; |
d4ccb132 | 1054 | |
4d12b8b1 LRV |
1055 | /* first generation must not be 0 */ |
1056 | dev->targets_generation = 1; | |
1057 | ||
c8d56ae7 | 1058 | if (ops->check_presence) { |
c8d56ae7 EL |
1059 | init_timer(&dev->check_pres_timer); |
1060 | dev->check_pres_timer.data = (unsigned long)dev; | |
1061 | dev->check_pres_timer.function = nfc_check_pres_timeout; | |
1062 | ||
1063 | INIT_WORK(&dev->check_pres_work, nfc_check_pres_work); | |
c8d56ae7 EL |
1064 | } |
1065 | ||
3e256b8f LRV |
1066 | return dev; |
1067 | } | |
1068 | EXPORT_SYMBOL(nfc_allocate_device); | |
1069 | ||
1070 | /** | |
1071 | * nfc_register_device - register a nfc device in the nfc subsystem | |
1072 | * | |
1073 | * @dev: The nfc device to register | |
1074 | */ | |
1075 | int nfc_register_device(struct nfc_dev *dev) | |
1076 | { | |
1077 | int rc; | |
1078 | ||
20c239c1 | 1079 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
3e256b8f | 1080 | |
7eda8b8e SO |
1081 | dev->idx = ida_simple_get(&nfc_index_ida, 0, 0, GFP_KERNEL); |
1082 | if (dev->idx < 0) | |
1083 | return dev->idx; | |
1084 | ||
1085 | dev->dev.class = &nfc_class; | |
1086 | dev_set_name(&dev->dev, "nfc%d", dev->idx); | |
1087 | device_initialize(&dev->dev); | |
1088 | ||
3e256b8f LRV |
1089 | mutex_lock(&nfc_devlist_mutex); |
1090 | nfc_devlist_generation++; | |
1091 | rc = device_add(&dev->dev); | |
1092 | mutex_unlock(&nfc_devlist_mutex); | |
1093 | ||
4d12b8b1 LRV |
1094 | if (rc < 0) |
1095 | return rc; | |
1096 | ||
d646960f SO |
1097 | rc = nfc_llcp_register_device(dev); |
1098 | if (rc) | |
1099 | pr_err("Could not register llcp device\n"); | |
1100 | ||
4d12b8b1 LRV |
1101 | rc = nfc_genl_device_added(dev); |
1102 | if (rc) | |
20c239c1 JP |
1103 | pr_debug("The userspace won't be notified that the device %s was added\n", |
1104 | dev_name(&dev->dev)); | |
4d12b8b1 | 1105 | |
be055b2f SO |
1106 | dev->rfkill = rfkill_alloc(dev_name(&dev->dev), &dev->dev, |
1107 | RFKILL_TYPE_NFC, &nfc_rfkill_ops, dev); | |
1108 | if (dev->rfkill) { | |
1109 | if (rfkill_register(dev->rfkill) < 0) { | |
1110 | rfkill_destroy(dev->rfkill); | |
1111 | dev->rfkill = NULL; | |
1112 | } | |
1113 | } | |
1114 | ||
4d12b8b1 | 1115 | return 0; |
3e256b8f LRV |
1116 | } |
1117 | EXPORT_SYMBOL(nfc_register_device); | |
1118 | ||
1119 | /** | |
1120 | * nfc_unregister_device - unregister a nfc device in the nfc subsystem | |
1121 | * | |
1122 | * @dev: The nfc device to unregister | |
1123 | */ | |
1124 | void nfc_unregister_device(struct nfc_dev *dev) | |
1125 | { | |
7eda8b8e | 1126 | int rc, id; |
4d12b8b1 | 1127 | |
20c239c1 | 1128 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
3e256b8f | 1129 | |
7eda8b8e SO |
1130 | id = dev->idx; |
1131 | ||
be055b2f SO |
1132 | if (dev->rfkill) { |
1133 | rfkill_unregister(dev->rfkill); | |
1134 | rfkill_destroy(dev->rfkill); | |
1135 | } | |
1136 | ||
f0c91038 EL |
1137 | if (dev->ops->check_presence) { |
1138 | device_lock(&dev->dev); | |
1139 | dev->shutting_down = true; | |
1140 | device_unlock(&dev->dev); | |
1141 | del_timer_sync(&dev->check_pres_timer); | |
1142 | cancel_work_sync(&dev->check_pres_work); | |
1143 | } | |
3e256b8f | 1144 | |
f0c91038 EL |
1145 | rc = nfc_genl_device_removed(dev); |
1146 | if (rc) | |
1147 | pr_debug("The userspace won't be notified that the device %s " | |
1148 | "was removed\n", dev_name(&dev->dev)); | |
4d12b8b1 | 1149 | |
d646960f SO |
1150 | nfc_llcp_unregister_device(dev); |
1151 | ||
f0c91038 EL |
1152 | mutex_lock(&nfc_devlist_mutex); |
1153 | nfc_devlist_generation++; | |
1154 | device_del(&dev->dev); | |
1155 | mutex_unlock(&nfc_devlist_mutex); | |
4d12b8b1 | 1156 | |
7eda8b8e | 1157 | ida_simple_remove(&nfc_index_ida, id); |
3e256b8f LRV |
1158 | } |
1159 | EXPORT_SYMBOL(nfc_unregister_device); | |
1160 | ||
1161 | static int __init nfc_init(void) | |
1162 | { | |
4d12b8b1 LRV |
1163 | int rc; |
1164 | ||
ed1e0ad8 | 1165 | pr_info("NFC Core ver %s\n", VERSION); |
3e256b8f | 1166 | |
4d12b8b1 LRV |
1167 | rc = class_register(&nfc_class); |
1168 | if (rc) | |
1169 | return rc; | |
1170 | ||
1171 | rc = nfc_genl_init(); | |
1172 | if (rc) | |
1173 | goto err_genl; | |
1174 | ||
1175 | /* the first generation must not be 0 */ | |
1176 | nfc_devlist_generation = 1; | |
1177 | ||
23b7869c LRV |
1178 | rc = rawsock_init(); |
1179 | if (rc) | |
1180 | goto err_rawsock; | |
1181 | ||
d646960f SO |
1182 | rc = nfc_llcp_init(); |
1183 | if (rc) | |
1184 | goto err_llcp_sock; | |
1185 | ||
c7fe3b52 AAJ |
1186 | rc = af_nfc_init(); |
1187 | if (rc) | |
1188 | goto err_af_nfc; | |
1189 | ||
4d12b8b1 LRV |
1190 | return 0; |
1191 | ||
c7fe3b52 | 1192 | err_af_nfc: |
d646960f SO |
1193 | nfc_llcp_exit(); |
1194 | err_llcp_sock: | |
23b7869c LRV |
1195 | rawsock_exit(); |
1196 | err_rawsock: | |
c7fe3b52 | 1197 | nfc_genl_exit(); |
4d12b8b1 LRV |
1198 | err_genl: |
1199 | class_unregister(&nfc_class); | |
1200 | return rc; | |
3e256b8f LRV |
1201 | } |
1202 | ||
1203 | static void __exit nfc_exit(void) | |
1204 | { | |
c7fe3b52 | 1205 | af_nfc_exit(); |
d646960f | 1206 | nfc_llcp_exit(); |
23b7869c | 1207 | rawsock_exit(); |
4d12b8b1 | 1208 | nfc_genl_exit(); |
3e256b8f LRV |
1209 | class_unregister(&nfc_class); |
1210 | } | |
1211 | ||
1212 | subsys_initcall(nfc_init); | |
1213 | module_exit(nfc_exit); | |
1214 | ||
1215 | MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>"); | |
1216 | MODULE_DESCRIPTION("NFC Core ver " VERSION); | |
1217 | MODULE_VERSION(VERSION); | |
1218 | MODULE_LICENSE("GPL"); | |
1155bb61 | 1219 | MODULE_ALIAS_NETPROTO(PF_NFC); |
5df16cad | 1220 | MODULE_ALIAS_GENL_FAMILY(NFC_GENL_NAME); |