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 | 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 | ||
0f450772 | 283 | for (i = 0; i < dev->n_targets; i++) { |
90099433 EL |
284 | if (dev->targets[i].idx == target_idx) |
285 | return &dev->targets[i]; | |
286 | } | |
287 | ||
288 | return NULL; | |
289 | } | |
290 | ||
47807d3d | 291 | int nfc_dep_link_up(struct nfc_dev *dev, int target_index, u8 comm_mode) |
1ed28f61 SO |
292 | { |
293 | int rc = 0; | |
47807d3d SO |
294 | u8 *gb; |
295 | size_t gb_len; | |
90099433 | 296 | struct nfc_target *target; |
1ed28f61 | 297 | |
47807d3d | 298 | pr_debug("dev_name=%s comm %d\n", dev_name(&dev->dev), comm_mode); |
1ed28f61 SO |
299 | |
300 | if (!dev->ops->dep_link_up) | |
301 | return -EOPNOTSUPP; | |
302 | ||
303 | device_lock(&dev->dev); | |
304 | ||
305 | if (!device_is_registered(&dev->dev)) { | |
306 | rc = -ENODEV; | |
307 | goto error; | |
308 | } | |
309 | ||
310 | if (dev->dep_link_up == true) { | |
311 | rc = -EALREADY; | |
312 | goto error; | |
313 | } | |
314 | ||
47807d3d SO |
315 | gb = nfc_llcp_general_bytes(dev, &gb_len); |
316 | if (gb_len > NFC_MAX_GT_LEN) { | |
317 | rc = -EINVAL; | |
318 | goto error; | |
319 | } | |
320 | ||
90099433 EL |
321 | target = nfc_find_target(dev, target_index); |
322 | if (target == NULL) { | |
323 | rc = -ENOTCONN; | |
324 | goto error; | |
325 | } | |
326 | ||
327 | rc = dev->ops->dep_link_up(dev, target, comm_mode, gb, gb_len); | |
f212ad5e | 328 | if (!rc) { |
90099433 | 329 | dev->active_target = target; |
f212ad5e SO |
330 | dev->rf_mode = NFC_RF_INITIATOR; |
331 | } | |
1ed28f61 SO |
332 | |
333 | error: | |
334 | device_unlock(&dev->dev); | |
335 | return rc; | |
336 | } | |
337 | ||
338 | int nfc_dep_link_down(struct nfc_dev *dev) | |
339 | { | |
340 | int rc = 0; | |
341 | ||
342 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); | |
343 | ||
344 | if (!dev->ops->dep_link_down) | |
345 | return -EOPNOTSUPP; | |
346 | ||
347 | device_lock(&dev->dev); | |
348 | ||
349 | if (!device_is_registered(&dev->dev)) { | |
350 | rc = -ENODEV; | |
351 | goto error; | |
352 | } | |
353 | ||
354 | if (dev->dep_link_up == false) { | |
355 | rc = -EALREADY; | |
356 | goto error; | |
357 | } | |
358 | ||
1ed28f61 SO |
359 | rc = dev->ops->dep_link_down(dev); |
360 | if (!rc) { | |
361 | dev->dep_link_up = false; | |
90099433 | 362 | dev->active_target = NULL; |
5bcf099c | 363 | dev->rf_mode = NFC_RF_NONE; |
d646960f | 364 | nfc_llcp_mac_is_down(dev); |
1ed28f61 SO |
365 | nfc_genl_dep_link_down_event(dev); |
366 | } | |
367 | ||
368 | error: | |
369 | device_unlock(&dev->dev); | |
5bcf099c | 370 | |
1ed28f61 SO |
371 | return rc; |
372 | } | |
373 | ||
374 | int nfc_dep_link_is_up(struct nfc_dev *dev, u32 target_idx, | |
0a40acb2 | 375 | u8 comm_mode, u8 rf_mode) |
1ed28f61 SO |
376 | { |
377 | dev->dep_link_up = true; | |
1ed28f61 | 378 | |
d31652a2 | 379 | if (!dev->active_target && rf_mode == NFC_RF_INITIATOR) { |
e29a9e2a SO |
380 | struct nfc_target *target; |
381 | ||
382 | target = nfc_find_target(dev, target_idx); | |
383 | if (target == NULL) | |
384 | return -ENOTCONN; | |
385 | ||
386 | dev->active_target = target; | |
387 | } | |
388 | ||
389 | dev->polling = false; | |
390 | dev->rf_mode = rf_mode; | |
391 | ||
d646960f SO |
392 | nfc_llcp_mac_is_up(dev, target_idx, comm_mode, rf_mode); |
393 | ||
1ed28f61 SO |
394 | return nfc_genl_dep_link_up_event(dev, target_idx, comm_mode, rf_mode); |
395 | } | |
396 | EXPORT_SYMBOL(nfc_dep_link_is_up); | |
397 | ||
3e256b8f LRV |
398 | /** |
399 | * nfc_activate_target - prepare the target for data exchange | |
400 | * | |
401 | * @dev: The nfc device that found the target | |
402 | * @target_idx: index of the target that must be activated | |
403 | * @protocol: nfc protocol that will be used for data exchange | |
404 | */ | |
405 | int nfc_activate_target(struct nfc_dev *dev, u32 target_idx, u32 protocol) | |
406 | { | |
407 | int rc; | |
90099433 | 408 | struct nfc_target *target; |
3e256b8f | 409 | |
20c239c1 JP |
410 | pr_debug("dev_name=%s target_idx=%u protocol=%u\n", |
411 | dev_name(&dev->dev), target_idx, protocol); | |
3e256b8f LRV |
412 | |
413 | device_lock(&dev->dev); | |
414 | ||
415 | if (!device_is_registered(&dev->dev)) { | |
416 | rc = -ENODEV; | |
417 | goto error; | |
418 | } | |
419 | ||
90099433 EL |
420 | if (dev->active_target) { |
421 | rc = -EBUSY; | |
422 | goto error; | |
423 | } | |
424 | ||
425 | target = nfc_find_target(dev, target_idx); | |
426 | if (target == NULL) { | |
427 | rc = -ENOTCONN; | |
428 | goto error; | |
429 | } | |
430 | ||
431 | rc = dev->ops->activate_target(dev, target, protocol); | |
c8d56ae7 | 432 | if (!rc) { |
90099433 | 433 | dev->active_target = target; |
f212ad5e | 434 | dev->rf_mode = NFC_RF_INITIATOR; |
3e256b8f | 435 | |
f0c91038 | 436 | if (dev->ops->check_presence && !dev->shutting_down) |
c8d56ae7 EL |
437 | mod_timer(&dev->check_pres_timer, jiffies + |
438 | msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS)); | |
439 | } | |
3e256b8f LRV |
440 | |
441 | error: | |
442 | device_unlock(&dev->dev); | |
443 | return rc; | |
444 | } | |
445 | ||
446 | /** | |
447 | * nfc_deactivate_target - deactivate a nfc target | |
448 | * | |
449 | * @dev: The nfc device that found the target | |
450 | * @target_idx: index of the target that must be deactivated | |
451 | */ | |
96d4581f | 452 | int nfc_deactivate_target(struct nfc_dev *dev, u32 target_idx, u8 mode) |
3e256b8f LRV |
453 | { |
454 | int rc = 0; | |
455 | ||
20c239c1 JP |
456 | pr_debug("dev_name=%s target_idx=%u\n", |
457 | dev_name(&dev->dev), target_idx); | |
3e256b8f LRV |
458 | |
459 | device_lock(&dev->dev); | |
460 | ||
461 | if (!device_is_registered(&dev->dev)) { | |
462 | rc = -ENODEV; | |
463 | goto error; | |
464 | } | |
465 | ||
90099433 EL |
466 | if (dev->active_target == NULL) { |
467 | rc = -ENOTCONN; | |
468 | goto error; | |
469 | } | |
470 | ||
471 | if (dev->active_target->idx != target_idx) { | |
472 | rc = -ENOTCONN; | |
473 | goto error; | |
474 | } | |
475 | ||
c8d56ae7 EL |
476 | if (dev->ops->check_presence) |
477 | del_timer_sync(&dev->check_pres_timer); | |
478 | ||
96d4581f | 479 | dev->ops->deactivate_target(dev, dev->active_target, mode); |
90099433 | 480 | dev->active_target = NULL; |
3e256b8f LRV |
481 | |
482 | error: | |
483 | device_unlock(&dev->dev); | |
484 | return rc; | |
485 | } | |
486 | ||
487 | /** | |
488 | * nfc_data_exchange - transceive data | |
489 | * | |
490 | * @dev: The nfc device that found the target | |
491 | * @target_idx: index of the target | |
492 | * @skb: data to be sent | |
493 | * @cb: callback called when the response is received | |
494 | * @cb_context: parameter for the callback function | |
495 | * | |
496 | * The user must wait for the callback before calling this function again. | |
497 | */ | |
0a40acb2 SO |
498 | int nfc_data_exchange(struct nfc_dev *dev, u32 target_idx, struct sk_buff *skb, |
499 | data_exchange_cb_t cb, void *cb_context) | |
3e256b8f LRV |
500 | { |
501 | int rc; | |
502 | ||
20c239c1 JP |
503 | pr_debug("dev_name=%s target_idx=%u skb->len=%u\n", |
504 | dev_name(&dev->dev), target_idx, skb->len); | |
3e256b8f LRV |
505 | |
506 | device_lock(&dev->dev); | |
507 | ||
508 | if (!device_is_registered(&dev->dev)) { | |
509 | rc = -ENODEV; | |
510 | kfree_skb(skb); | |
511 | goto error; | |
512 | } | |
513 | ||
be9ae4ce SO |
514 | if (dev->rf_mode == NFC_RF_INITIATOR && dev->active_target != NULL) { |
515 | if (dev->active_target->idx != target_idx) { | |
516 | rc = -EADDRNOTAVAIL; | |
517 | kfree_skb(skb); | |
518 | goto error; | |
519 | } | |
144612ca | 520 | |
be9ae4ce SO |
521 | if (dev->ops->check_presence) |
522 | del_timer_sync(&dev->check_pres_timer); | |
523 | ||
524 | rc = dev->ops->im_transceive(dev, dev->active_target, skb, cb, | |
525 | cb_context); | |
526 | ||
f0c91038 | 527 | if (!rc && dev->ops->check_presence && !dev->shutting_down) |
be9ae4ce SO |
528 | mod_timer(&dev->check_pres_timer, jiffies + |
529 | msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS)); | |
530 | } else if (dev->rf_mode == NFC_RF_TARGET && dev->ops->tm_send != NULL) { | |
531 | rc = dev->ops->tm_send(dev, skb); | |
532 | } else { | |
533 | rc = -ENOTCONN; | |
144612ca EL |
534 | kfree_skb(skb); |
535 | goto error; | |
536 | } | |
537 | ||
c8d56ae7 | 538 | |
3e256b8f LRV |
539 | error: |
540 | device_unlock(&dev->dev); | |
541 | return rc; | |
542 | } | |
543 | ||
d8eb18ee | 544 | struct nfc_se *nfc_find_se(struct nfc_dev *dev, u32 se_idx) |
c531c9ec | 545 | { |
156cef80 | 546 | struct nfc_se *se; |
c531c9ec | 547 | |
156cef80 | 548 | list_for_each_entry(se, &dev->secure_elements, list) |
c531c9ec SO |
549 | if (se->idx == se_idx) |
550 | return se; | |
551 | ||
552 | return NULL; | |
553 | } | |
d8eb18ee | 554 | EXPORT_SYMBOL(nfc_find_se); |
c531c9ec SO |
555 | |
556 | int nfc_enable_se(struct nfc_dev *dev, u32 se_idx) | |
557 | { | |
c531c9ec SO |
558 | struct nfc_se *se; |
559 | int rc; | |
560 | ||
561 | pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); | |
562 | ||
563 | device_lock(&dev->dev); | |
564 | ||
565 | if (!device_is_registered(&dev->dev)) { | |
566 | rc = -ENODEV; | |
567 | goto error; | |
568 | } | |
569 | ||
570 | if (!dev->dev_up) { | |
571 | rc = -ENODEV; | |
572 | goto error; | |
573 | } | |
574 | ||
575 | if (dev->polling) { | |
576 | rc = -EBUSY; | |
577 | goto error; | |
578 | } | |
579 | ||
580 | if (!dev->ops->enable_se || !dev->ops->disable_se) { | |
581 | rc = -EOPNOTSUPP; | |
582 | goto error; | |
583 | } | |
584 | ||
d8eb18ee | 585 | se = nfc_find_se(dev, se_idx); |
c531c9ec SO |
586 | if (!se) { |
587 | rc = -EINVAL; | |
588 | goto error; | |
589 | } | |
590 | ||
2c383283 | 591 | if (se->state == NFC_SE_ENABLED) { |
c531c9ec SO |
592 | rc = -EALREADY; |
593 | goto error; | |
594 | } | |
595 | ||
596 | rc = dev->ops->enable_se(dev, se_idx); | |
39525ee1 AW |
597 | if (rc >= 0) |
598 | se->state = NFC_SE_ENABLED; | |
c531c9ec SO |
599 | |
600 | error: | |
601 | device_unlock(&dev->dev); | |
602 | return rc; | |
603 | } | |
604 | ||
605 | int nfc_disable_se(struct nfc_dev *dev, u32 se_idx) | |
606 | { | |
c531c9ec SO |
607 | struct nfc_se *se; |
608 | int rc; | |
609 | ||
610 | pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); | |
611 | ||
612 | device_lock(&dev->dev); | |
613 | ||
614 | if (!device_is_registered(&dev->dev)) { | |
615 | rc = -ENODEV; | |
616 | goto error; | |
617 | } | |
618 | ||
619 | if (!dev->dev_up) { | |
620 | rc = -ENODEV; | |
621 | goto error; | |
622 | } | |
623 | ||
624 | if (!dev->ops->enable_se || !dev->ops->disable_se) { | |
625 | rc = -EOPNOTSUPP; | |
626 | goto error; | |
627 | } | |
628 | ||
d8eb18ee | 629 | se = nfc_find_se(dev, se_idx); |
c531c9ec SO |
630 | if (!se) { |
631 | rc = -EINVAL; | |
632 | goto error; | |
633 | } | |
634 | ||
2c383283 | 635 | if (se->state == NFC_SE_DISABLED) { |
c531c9ec SO |
636 | rc = -EALREADY; |
637 | goto error; | |
638 | } | |
639 | ||
640 | rc = dev->ops->disable_se(dev, se_idx); | |
39525ee1 AW |
641 | if (rc >= 0) |
642 | se->state = NFC_SE_DISABLED; | |
c531c9ec SO |
643 | |
644 | error: | |
645 | device_unlock(&dev->dev); | |
646 | return rc; | |
647 | } | |
648 | ||
541d920b SO |
649 | int nfc_set_remote_general_bytes(struct nfc_dev *dev, u8 *gb, u8 gb_len) |
650 | { | |
0a40acb2 | 651 | pr_debug("dev_name=%s gb_len=%d\n", dev_name(&dev->dev), gb_len); |
541d920b | 652 | |
d646960f | 653 | return nfc_llcp_set_remote_gb(dev, gb, gb_len); |
541d920b SO |
654 | } |
655 | EXPORT_SYMBOL(nfc_set_remote_general_bytes); | |
656 | ||
ab73b751 SO |
657 | u8 *nfc_get_local_general_bytes(struct nfc_dev *dev, size_t *gb_len) |
658 | { | |
659 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); | |
660 | ||
661 | return nfc_llcp_general_bytes(dev, gb_len); | |
662 | } | |
663 | EXPORT_SYMBOL(nfc_get_local_general_bytes); | |
664 | ||
73167ced SO |
665 | int nfc_tm_data_received(struct nfc_dev *dev, struct sk_buff *skb) |
666 | { | |
667 | /* Only LLCP target mode for now */ | |
668 | if (dev->dep_link_up == false) { | |
669 | kfree_skb(skb); | |
670 | return -ENOLINK; | |
671 | } | |
672 | ||
673 | return nfc_llcp_data_received(dev, skb); | |
674 | } | |
675 | EXPORT_SYMBOL(nfc_tm_data_received); | |
676 | ||
fc40a8c1 SO |
677 | int nfc_tm_activated(struct nfc_dev *dev, u32 protocol, u8 comm_mode, |
678 | u8 *gb, size_t gb_len) | |
679 | { | |
680 | int rc; | |
681 | ||
682 | device_lock(&dev->dev); | |
683 | ||
684 | dev->polling = false; | |
685 | ||
686 | if (gb != NULL) { | |
687 | rc = nfc_set_remote_general_bytes(dev, gb, gb_len); | |
688 | if (rc < 0) | |
689 | goto out; | |
690 | } | |
691 | ||
f212ad5e SO |
692 | dev->rf_mode = NFC_RF_TARGET; |
693 | ||
fc40a8c1 SO |
694 | if (protocol == NFC_PROTO_NFC_DEP_MASK) |
695 | nfc_dep_link_is_up(dev, 0, comm_mode, NFC_RF_TARGET); | |
696 | ||
697 | rc = nfc_genl_tm_activated(dev, protocol); | |
698 | ||
699 | out: | |
700 | device_unlock(&dev->dev); | |
701 | ||
702 | return rc; | |
703 | } | |
704 | EXPORT_SYMBOL(nfc_tm_activated); | |
705 | ||
706 | int nfc_tm_deactivated(struct nfc_dev *dev) | |
707 | { | |
708 | dev->dep_link_up = false; | |
5bcf099c | 709 | dev->rf_mode = NFC_RF_NONE; |
fc40a8c1 SO |
710 | |
711 | return nfc_genl_tm_deactivated(dev); | |
712 | } | |
713 | EXPORT_SYMBOL(nfc_tm_deactivated); | |
714 | ||
3e256b8f | 715 | /** |
7c7cd3bf | 716 | * nfc_alloc_send_skb - allocate a skb for data exchange responses |
3e256b8f LRV |
717 | * |
718 | * @size: size to allocate | |
719 | * @gfp: gfp flags | |
720 | */ | |
7c7cd3bf | 721 | struct sk_buff *nfc_alloc_send_skb(struct nfc_dev *dev, struct sock *sk, |
0a40acb2 SO |
722 | unsigned int flags, unsigned int size, |
723 | unsigned int *err) | |
7c7cd3bf SO |
724 | { |
725 | struct sk_buff *skb; | |
726 | unsigned int total_size; | |
727 | ||
728 | total_size = size + | |
729 | dev->tx_headroom + dev->tx_tailroom + NFC_HEADER_SIZE; | |
730 | ||
731 | skb = sock_alloc_send_skb(sk, total_size, flags & MSG_DONTWAIT, err); | |
732 | if (skb) | |
733 | skb_reserve(skb, dev->tx_headroom + NFC_HEADER_SIZE); | |
734 | ||
735 | return skb; | |
736 | } | |
737 | ||
738 | /** | |
739 | * nfc_alloc_recv_skb - allocate a skb for data exchange responses | |
740 | * | |
741 | * @size: size to allocate | |
742 | * @gfp: gfp flags | |
743 | */ | |
744 | struct sk_buff *nfc_alloc_recv_skb(unsigned int size, gfp_t gfp) | |
3e256b8f LRV |
745 | { |
746 | struct sk_buff *skb; | |
747 | unsigned int total_size; | |
748 | ||
749 | total_size = size + 1; | |
750 | skb = alloc_skb(total_size, gfp); | |
751 | ||
752 | if (skb) | |
753 | skb_reserve(skb, 1); | |
754 | ||
755 | return skb; | |
756 | } | |
7c7cd3bf | 757 | EXPORT_SYMBOL(nfc_alloc_recv_skb); |
3e256b8f | 758 | |
4d12b8b1 LRV |
759 | /** |
760 | * nfc_targets_found - inform that targets were found | |
761 | * | |
762 | * @dev: The nfc device that found the targets | |
763 | * @targets: array of nfc targets found | |
764 | * @ntargets: targets array size | |
765 | * | |
766 | * The device driver must call this function when one or many nfc targets | |
767 | * are found. After calling this function, the device driver must stop | |
768 | * polling for targets. | |
d94f9c55 EL |
769 | * NOTE: This function can be called with targets=NULL and n_targets=0 to |
770 | * notify a driver error, meaning that the polling operation cannot complete. | |
d4ccb132 EL |
771 | * IMPORTANT: this function must not be called from an atomic context. |
772 | * In addition, it must also not be called from a context that would prevent | |
773 | * the NFC Core to call other nfc ops entry point concurrently. | |
4d12b8b1 | 774 | */ |
0a40acb2 SO |
775 | int nfc_targets_found(struct nfc_dev *dev, |
776 | struct nfc_target *targets, int n_targets) | |
4d12b8b1 | 777 | { |
c4fbb651 SO |
778 | int i; |
779 | ||
20c239c1 | 780 | pr_debug("dev_name=%s n_targets=%d\n", dev_name(&dev->dev), n_targets); |
4d12b8b1 | 781 | |
c4fbb651 | 782 | for (i = 0; i < n_targets; i++) |
01ae0eea | 783 | targets[i].idx = dev->target_next_idx++; |
c4fbb651 | 784 | |
d4ccb132 | 785 | device_lock(&dev->dev); |
4d12b8b1 | 786 | |
8668fdd6 EL |
787 | if (dev->polling == false) { |
788 | device_unlock(&dev->dev); | |
789 | return 0; | |
790 | } | |
791 | ||
792 | dev->polling = false; | |
793 | ||
4d12b8b1 LRV |
794 | dev->targets_generation++; |
795 | ||
796 | kfree(dev->targets); | |
d94f9c55 | 797 | dev->targets = NULL; |
4d12b8b1 | 798 | |
d94f9c55 EL |
799 | if (targets) { |
800 | dev->targets = kmemdup(targets, | |
801 | n_targets * sizeof(struct nfc_target), | |
802 | GFP_ATOMIC); | |
803 | ||
804 | if (!dev->targets) { | |
805 | dev->n_targets = 0; | |
806 | device_unlock(&dev->dev); | |
807 | return -ENOMEM; | |
808 | } | |
4d12b8b1 LRV |
809 | } |
810 | ||
811 | dev->n_targets = n_targets; | |
d4ccb132 | 812 | device_unlock(&dev->dev); |
4d12b8b1 LRV |
813 | |
814 | nfc_genl_targets_found(dev); | |
815 | ||
816 | return 0; | |
817 | } | |
818 | EXPORT_SYMBOL(nfc_targets_found); | |
819 | ||
d4ccb132 EL |
820 | /** |
821 | * nfc_target_lost - inform that an activated target went out of field | |
822 | * | |
823 | * @dev: The nfc device that had the activated target in field | |
824 | * @target_idx: the nfc index of the target | |
825 | * | |
826 | * The device driver must call this function when the activated target | |
827 | * goes out of the field. | |
828 | * IMPORTANT: this function must not be called from an atomic context. | |
829 | * In addition, it must also not be called from a context that would prevent | |
830 | * the NFC Core to call other nfc ops entry point concurrently. | |
831 | */ | |
e1da0efa EL |
832 | int nfc_target_lost(struct nfc_dev *dev, u32 target_idx) |
833 | { | |
834 | struct nfc_target *tg; | |
835 | int i; | |
836 | ||
837 | pr_debug("dev_name %s n_target %d\n", dev_name(&dev->dev), target_idx); | |
838 | ||
d4ccb132 | 839 | device_lock(&dev->dev); |
e1da0efa EL |
840 | |
841 | for (i = 0; i < dev->n_targets; i++) { | |
842 | tg = &dev->targets[i]; | |
843 | if (tg->idx == target_idx) | |
844 | break; | |
845 | } | |
846 | ||
847 | if (i == dev->n_targets) { | |
d4ccb132 | 848 | device_unlock(&dev->dev); |
e1da0efa EL |
849 | return -EINVAL; |
850 | } | |
851 | ||
852 | dev->targets_generation++; | |
853 | dev->n_targets--; | |
90099433 | 854 | dev->active_target = NULL; |
e1da0efa EL |
855 | |
856 | if (dev->n_targets) { | |
857 | memcpy(&dev->targets[i], &dev->targets[i + 1], | |
858 | (dev->n_targets - i) * sizeof(struct nfc_target)); | |
859 | } else { | |
860 | kfree(dev->targets); | |
861 | dev->targets = NULL; | |
862 | } | |
863 | ||
d4ccb132 | 864 | device_unlock(&dev->dev); |
e1da0efa EL |
865 | |
866 | nfc_genl_target_lost(dev, target_idx); | |
867 | ||
868 | return 0; | |
869 | } | |
870 | EXPORT_SYMBOL(nfc_target_lost); | |
871 | ||
9eb334ac | 872 | inline void nfc_driver_failure(struct nfc_dev *dev, int err) |
456411ca | 873 | { |
9eb334ac | 874 | nfc_targets_found(dev, NULL, 0); |
456411ca EL |
875 | } |
876 | EXPORT_SYMBOL(nfc_driver_failure); | |
877 | ||
fed7c25e SO |
878 | int nfc_add_se(struct nfc_dev *dev, u32 se_idx, u16 type) |
879 | { | |
c531c9ec | 880 | struct nfc_se *se; |
2757c372 | 881 | int rc; |
fed7c25e SO |
882 | |
883 | pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); | |
884 | ||
d8eb18ee | 885 | se = nfc_find_se(dev, se_idx); |
c531c9ec SO |
886 | if (se) |
887 | return -EALREADY; | |
fed7c25e SO |
888 | |
889 | se = kzalloc(sizeof(struct nfc_se), GFP_KERNEL); | |
890 | if (!se) | |
891 | return -ENOMEM; | |
892 | ||
893 | se->idx = se_idx; | |
894 | se->type = type; | |
895 | se->state = NFC_SE_DISABLED; | |
896 | INIT_LIST_HEAD(&se->list); | |
897 | ||
898 | list_add(&se->list, &dev->secure_elements); | |
899 | ||
2757c372 SO |
900 | rc = nfc_genl_se_added(dev, se_idx, type); |
901 | if (rc < 0) { | |
902 | list_del(&se->list); | |
903 | kfree(se); | |
904 | ||
905 | return rc; | |
906 | } | |
907 | ||
fed7c25e SO |
908 | return 0; |
909 | } | |
910 | EXPORT_SYMBOL(nfc_add_se); | |
911 | ||
912 | int nfc_remove_se(struct nfc_dev *dev, u32 se_idx) | |
913 | { | |
914 | struct nfc_se *se, *n; | |
2757c372 | 915 | int rc; |
fed7c25e SO |
916 | |
917 | pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); | |
918 | ||
919 | list_for_each_entry_safe(se, n, &dev->secure_elements, list) | |
920 | if (se->idx == se_idx) { | |
2757c372 SO |
921 | rc = nfc_genl_se_removed(dev, se_idx); |
922 | if (rc < 0) | |
923 | return rc; | |
924 | ||
fed7c25e SO |
925 | list_del(&se->list); |
926 | kfree(se); | |
927 | ||
928 | return 0; | |
929 | } | |
930 | ||
931 | return -EINVAL; | |
932 | } | |
933 | EXPORT_SYMBOL(nfc_remove_se); | |
934 | ||
447b27c4 CR |
935 | int nfc_se_transaction(struct nfc_dev *dev, u8 se_idx, |
936 | struct nfc_evt_transaction *evt_transaction) | |
937 | { | |
938 | int rc; | |
939 | ||
940 | pr_debug("transaction: %x\n", se_idx); | |
941 | ||
942 | device_lock(&dev->dev); | |
943 | ||
944 | if (!evt_transaction) { | |
945 | rc = -EPROTO; | |
946 | goto out; | |
947 | } | |
948 | ||
949 | rc = nfc_genl_se_transaction(dev, se_idx, evt_transaction); | |
950 | out: | |
951 | device_unlock(&dev->dev); | |
952 | return rc; | |
953 | } | |
954 | EXPORT_SYMBOL(nfc_se_transaction); | |
955 | ||
9afec6d3 CR |
956 | int nfc_se_connectivity(struct nfc_dev *dev, u8 se_idx) |
957 | { | |
958 | int rc; | |
959 | ||
960 | pr_debug("connectivity: %x\n", se_idx); | |
961 | ||
962 | device_lock(&dev->dev); | |
963 | rc = nfc_genl_se_connectivity(dev, se_idx); | |
964 | device_unlock(&dev->dev); | |
965 | return rc; | |
966 | } | |
967 | EXPORT_SYMBOL(nfc_se_connectivity); | |
968 | ||
3e256b8f LRV |
969 | static void nfc_release(struct device *d) |
970 | { | |
971 | struct nfc_dev *dev = to_nfc_dev(d); | |
ee656e9d | 972 | struct nfc_se *se, *n; |
3e256b8f | 973 | |
20c239c1 | 974 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
3e256b8f | 975 | |
4d12b8b1 LRV |
976 | nfc_genl_data_exit(&dev->genl_data); |
977 | kfree(dev->targets); | |
ee656e9d SO |
978 | |
979 | list_for_each_entry_safe(se, n, &dev->secure_elements, list) { | |
980 | nfc_genl_se_removed(dev, se->idx); | |
981 | list_del(&se->list); | |
982 | kfree(se); | |
983 | } | |
984 | ||
3e256b8f LRV |
985 | kfree(dev); |
986 | } | |
987 | ||
c8d56ae7 EL |
988 | static void nfc_check_pres_work(struct work_struct *work) |
989 | { | |
990 | struct nfc_dev *dev = container_of(work, struct nfc_dev, | |
991 | check_pres_work); | |
992 | int rc; | |
993 | ||
994 | device_lock(&dev->dev); | |
995 | ||
90099433 EL |
996 | if (dev->active_target && timer_pending(&dev->check_pres_timer) == 0) { |
997 | rc = dev->ops->check_presence(dev, dev->active_target); | |
632c016a EL |
998 | if (rc == -EOPNOTSUPP) |
999 | goto exit; | |
f0c91038 | 1000 | if (rc) { |
d4ccb132 EL |
1001 | u32 active_target_idx = dev->active_target->idx; |
1002 | device_unlock(&dev->dev); | |
1003 | nfc_target_lost(dev, active_target_idx); | |
1004 | return; | |
c8d56ae7 | 1005 | } |
f0c91038 EL |
1006 | |
1007 | if (!dev->shutting_down) | |
1008 | mod_timer(&dev->check_pres_timer, jiffies + | |
1009 | msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS)); | |
c8d56ae7 EL |
1010 | } |
1011 | ||
632c016a | 1012 | exit: |
c8d56ae7 EL |
1013 | device_unlock(&dev->dev); |
1014 | } | |
1015 | ||
1016 | static void nfc_check_pres_timeout(unsigned long data) | |
1017 | { | |
1018 | struct nfc_dev *dev = (struct nfc_dev *)data; | |
1019 | ||
916082b0 | 1020 | schedule_work(&dev->check_pres_work); |
c8d56ae7 EL |
1021 | } |
1022 | ||
3e256b8f LRV |
1023 | struct class nfc_class = { |
1024 | .name = "nfc", | |
1025 | .dev_release = nfc_release, | |
1026 | }; | |
1027 | EXPORT_SYMBOL(nfc_class); | |
1028 | ||
9f3b795a | 1029 | static int match_idx(struct device *d, const void *data) |
3e256b8f LRV |
1030 | { |
1031 | struct nfc_dev *dev = to_nfc_dev(d); | |
9f3b795a | 1032 | const unsigned int *idx = data; |
3e256b8f LRV |
1033 | |
1034 | return dev->idx == *idx; | |
1035 | } | |
1036 | ||
95c96174 | 1037 | struct nfc_dev *nfc_get_device(unsigned int idx) |
3e256b8f LRV |
1038 | { |
1039 | struct device *d; | |
1040 | ||
1041 | d = class_find_device(&nfc_class, NULL, &idx, match_idx); | |
1042 | if (!d) | |
1043 | return NULL; | |
1044 | ||
1045 | return to_nfc_dev(d); | |
1046 | } | |
1047 | ||
1048 | /** | |
1049 | * nfc_allocate_device - allocate a new nfc device | |
1050 | * | |
1051 | * @ops: device operations | |
1052 | * @supported_protocols: NFC protocols supported by the device | |
1053 | */ | |
1054 | struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops, | |
0a40acb2 SO |
1055 | u32 supported_protocols, |
1056 | int tx_headroom, int tx_tailroom) | |
3e256b8f | 1057 | { |
3e256b8f LRV |
1058 | struct nfc_dev *dev; |
1059 | ||
1060 | if (!ops->start_poll || !ops->stop_poll || !ops->activate_target || | |
be9ae4ce | 1061 | !ops->deactivate_target || !ops->im_transceive) |
3e256b8f LRV |
1062 | return NULL; |
1063 | ||
1064 | if (!supported_protocols) | |
1065 | return NULL; | |
1066 | ||
1067 | dev = kzalloc(sizeof(struct nfc_dev), GFP_KERNEL); | |
1068 | if (!dev) | |
1069 | return NULL; | |
1070 | ||
3e256b8f LRV |
1071 | dev->ops = ops; |
1072 | dev->supported_protocols = supported_protocols; | |
e8753043 SO |
1073 | dev->tx_headroom = tx_headroom; |
1074 | dev->tx_tailroom = tx_tailroom; | |
fed7c25e | 1075 | INIT_LIST_HEAD(&dev->secure_elements); |
3e256b8f | 1076 | |
4d12b8b1 LRV |
1077 | nfc_genl_data_init(&dev->genl_data); |
1078 | ||
5bcf099c | 1079 | dev->rf_mode = NFC_RF_NONE; |
d4ccb132 | 1080 | |
4d12b8b1 LRV |
1081 | /* first generation must not be 0 */ |
1082 | dev->targets_generation = 1; | |
1083 | ||
c8d56ae7 | 1084 | if (ops->check_presence) { |
c8d56ae7 EL |
1085 | init_timer(&dev->check_pres_timer); |
1086 | dev->check_pres_timer.data = (unsigned long)dev; | |
1087 | dev->check_pres_timer.function = nfc_check_pres_timeout; | |
1088 | ||
1089 | INIT_WORK(&dev->check_pres_work, nfc_check_pres_work); | |
c8d56ae7 EL |
1090 | } |
1091 | ||
3e256b8f LRV |
1092 | return dev; |
1093 | } | |
1094 | EXPORT_SYMBOL(nfc_allocate_device); | |
1095 | ||
1096 | /** | |
1097 | * nfc_register_device - register a nfc device in the nfc subsystem | |
1098 | * | |
1099 | * @dev: The nfc device to register | |
1100 | */ | |
1101 | int nfc_register_device(struct nfc_dev *dev) | |
1102 | { | |
1103 | int rc; | |
1104 | ||
20c239c1 | 1105 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
3e256b8f | 1106 | |
7eda8b8e SO |
1107 | dev->idx = ida_simple_get(&nfc_index_ida, 0, 0, GFP_KERNEL); |
1108 | if (dev->idx < 0) | |
1109 | return dev->idx; | |
1110 | ||
1111 | dev->dev.class = &nfc_class; | |
1112 | dev_set_name(&dev->dev, "nfc%d", dev->idx); | |
1113 | device_initialize(&dev->dev); | |
1114 | ||
3e256b8f LRV |
1115 | mutex_lock(&nfc_devlist_mutex); |
1116 | nfc_devlist_generation++; | |
1117 | rc = device_add(&dev->dev); | |
1118 | mutex_unlock(&nfc_devlist_mutex); | |
1119 | ||
4d12b8b1 LRV |
1120 | if (rc < 0) |
1121 | return rc; | |
1122 | ||
d646960f SO |
1123 | rc = nfc_llcp_register_device(dev); |
1124 | if (rc) | |
1125 | pr_err("Could not register llcp device\n"); | |
1126 | ||
4d12b8b1 LRV |
1127 | rc = nfc_genl_device_added(dev); |
1128 | if (rc) | |
20c239c1 JP |
1129 | pr_debug("The userspace won't be notified that the device %s was added\n", |
1130 | dev_name(&dev->dev)); | |
4d12b8b1 | 1131 | |
be055b2f SO |
1132 | dev->rfkill = rfkill_alloc(dev_name(&dev->dev), &dev->dev, |
1133 | RFKILL_TYPE_NFC, &nfc_rfkill_ops, dev); | |
1134 | if (dev->rfkill) { | |
1135 | if (rfkill_register(dev->rfkill) < 0) { | |
1136 | rfkill_destroy(dev->rfkill); | |
1137 | dev->rfkill = NULL; | |
1138 | } | |
1139 | } | |
1140 | ||
4d12b8b1 | 1141 | return 0; |
3e256b8f LRV |
1142 | } |
1143 | EXPORT_SYMBOL(nfc_register_device); | |
1144 | ||
1145 | /** | |
1146 | * nfc_unregister_device - unregister a nfc device in the nfc subsystem | |
1147 | * | |
1148 | * @dev: The nfc device to unregister | |
1149 | */ | |
1150 | void nfc_unregister_device(struct nfc_dev *dev) | |
1151 | { | |
7eda8b8e | 1152 | int rc, id; |
4d12b8b1 | 1153 | |
20c239c1 | 1154 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
3e256b8f | 1155 | |
7eda8b8e SO |
1156 | id = dev->idx; |
1157 | ||
be055b2f SO |
1158 | if (dev->rfkill) { |
1159 | rfkill_unregister(dev->rfkill); | |
1160 | rfkill_destroy(dev->rfkill); | |
1161 | } | |
1162 | ||
f0c91038 EL |
1163 | if (dev->ops->check_presence) { |
1164 | device_lock(&dev->dev); | |
1165 | dev->shutting_down = true; | |
1166 | device_unlock(&dev->dev); | |
1167 | del_timer_sync(&dev->check_pres_timer); | |
1168 | cancel_work_sync(&dev->check_pres_work); | |
1169 | } | |
3e256b8f | 1170 | |
f0c91038 EL |
1171 | rc = nfc_genl_device_removed(dev); |
1172 | if (rc) | |
1173 | pr_debug("The userspace won't be notified that the device %s " | |
1174 | "was removed\n", dev_name(&dev->dev)); | |
4d12b8b1 | 1175 | |
d646960f SO |
1176 | nfc_llcp_unregister_device(dev); |
1177 | ||
f0c91038 EL |
1178 | mutex_lock(&nfc_devlist_mutex); |
1179 | nfc_devlist_generation++; | |
1180 | device_del(&dev->dev); | |
1181 | mutex_unlock(&nfc_devlist_mutex); | |
4d12b8b1 | 1182 | |
7eda8b8e | 1183 | ida_simple_remove(&nfc_index_ida, id); |
3e256b8f LRV |
1184 | } |
1185 | EXPORT_SYMBOL(nfc_unregister_device); | |
1186 | ||
1187 | static int __init nfc_init(void) | |
1188 | { | |
4d12b8b1 LRV |
1189 | int rc; |
1190 | ||
ed1e0ad8 | 1191 | pr_info("NFC Core ver %s\n", VERSION); |
3e256b8f | 1192 | |
4d12b8b1 LRV |
1193 | rc = class_register(&nfc_class); |
1194 | if (rc) | |
1195 | return rc; | |
1196 | ||
1197 | rc = nfc_genl_init(); | |
1198 | if (rc) | |
1199 | goto err_genl; | |
1200 | ||
1201 | /* the first generation must not be 0 */ | |
1202 | nfc_devlist_generation = 1; | |
1203 | ||
23b7869c LRV |
1204 | rc = rawsock_init(); |
1205 | if (rc) | |
1206 | goto err_rawsock; | |
1207 | ||
d646960f SO |
1208 | rc = nfc_llcp_init(); |
1209 | if (rc) | |
1210 | goto err_llcp_sock; | |
1211 | ||
c7fe3b52 AAJ |
1212 | rc = af_nfc_init(); |
1213 | if (rc) | |
1214 | goto err_af_nfc; | |
1215 | ||
4d12b8b1 LRV |
1216 | return 0; |
1217 | ||
c7fe3b52 | 1218 | err_af_nfc: |
d646960f SO |
1219 | nfc_llcp_exit(); |
1220 | err_llcp_sock: | |
23b7869c LRV |
1221 | rawsock_exit(); |
1222 | err_rawsock: | |
c7fe3b52 | 1223 | nfc_genl_exit(); |
4d12b8b1 LRV |
1224 | err_genl: |
1225 | class_unregister(&nfc_class); | |
1226 | return rc; | |
3e256b8f LRV |
1227 | } |
1228 | ||
1229 | static void __exit nfc_exit(void) | |
1230 | { | |
c7fe3b52 | 1231 | af_nfc_exit(); |
d646960f | 1232 | nfc_llcp_exit(); |
23b7869c | 1233 | rawsock_exit(); |
4d12b8b1 | 1234 | nfc_genl_exit(); |
3e256b8f LRV |
1235 | class_unregister(&nfc_class); |
1236 | } | |
1237 | ||
1238 | subsys_initcall(nfc_init); | |
1239 | module_exit(nfc_exit); | |
1240 | ||
1241 | MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>"); | |
1242 | MODULE_DESCRIPTION("NFC Core ver " VERSION); | |
1243 | MODULE_VERSION(VERSION); | |
1244 | MODULE_LICENSE("GPL"); | |
1155bb61 | 1245 | MODULE_ALIAS_NETPROTO(PF_NFC); |
5df16cad | 1246 | MODULE_ALIAS_GENL_FAMILY(NFC_GENL_NAME); |