Commit | Line | Data |
---|---|---|
1ccea77e | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
3e256b8f LRV |
2 | /* |
3 | * Copyright (C) 2011 Instituto Nokia de Tecnologia | |
4 | * | |
5 | * Authors: | |
6 | * Lauro Ramos Venancio <lauro.venancio@openbossa.org> | |
7 | * Aloisio Almeida Jr <aloisio.almeida@openbossa.org> | |
3e256b8f LRV |
8 | */ |
9 | ||
52858b51 | 10 | #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__ |
ed1e0ad8 | 11 | |
3e256b8f LRV |
12 | #include <linux/init.h> |
13 | #include <linux/kernel.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/slab.h> | |
be055b2f | 16 | #include <linux/rfkill.h> |
7c7cd3bf | 17 | #include <linux/nfc.h> |
3e256b8f | 18 | |
5df16cad SO |
19 | #include <net/genetlink.h> |
20 | ||
3e256b8f LRV |
21 | #include "nfc.h" |
22 | ||
23 | #define VERSION "0.1" | |
24 | ||
c8d56ae7 EL |
25 | #define NFC_CHECK_PRES_FREQ_MS 2000 |
26 | ||
3e256b8f LRV |
27 | int nfc_devlist_generation; |
28 | DEFINE_MUTEX(nfc_devlist_mutex); | |
29 | ||
7eda8b8e SO |
30 | /* NFC device ID bitmap */ |
31 | static DEFINE_IDA(nfc_index_ida); | |
32 | ||
9ea7187c | 33 | int nfc_fw_download(struct nfc_dev *dev, const char *firmware_name) |
9674da87 EL |
34 | { |
35 | int rc = 0; | |
36 | ||
37 | pr_debug("%s do firmware %s\n", dev_name(&dev->dev), firmware_name); | |
38 | ||
39 | device_lock(&dev->dev); | |
40 | ||
da5c0f11 | 41 | if (dev->shutting_down) { |
9674da87 EL |
42 | rc = -ENODEV; |
43 | goto error; | |
44 | } | |
45 | ||
46 | if (dev->dev_up) { | |
47 | rc = -EBUSY; | |
48 | goto error; | |
49 | } | |
50 | ||
9ea7187c | 51 | if (!dev->ops->fw_download) { |
9674da87 EL |
52 | rc = -EOPNOTSUPP; |
53 | goto error; | |
54 | } | |
55 | ||
9ea7187c SO |
56 | dev->fw_download_in_progress = true; |
57 | rc = dev->ops->fw_download(dev, firmware_name); | |
9674da87 | 58 | if (rc) |
9ea7187c | 59 | dev->fw_download_in_progress = false; |
9674da87 EL |
60 | |
61 | error: | |
62 | device_unlock(&dev->dev); | |
63 | return rc; | |
64 | } | |
65 | ||
352a5f5f EL |
66 | /** |
67 | * nfc_fw_download_done - inform that a firmware download was completed | |
68 | * | |
69 | * @dev: The nfc device to which firmware was downloaded | |
70 | * @firmware_name: The firmware filename | |
71 | * @result: The positive value of a standard errno value | |
72 | */ | |
73 | int nfc_fw_download_done(struct nfc_dev *dev, const char *firmware_name, | |
74 | u32 result) | |
9674da87 | 75 | { |
9ea7187c | 76 | dev->fw_download_in_progress = false; |
9674da87 | 77 | |
352a5f5f | 78 | return nfc_genl_fw_download_done(dev, firmware_name, result); |
9674da87 | 79 | } |
9ea7187c | 80 | EXPORT_SYMBOL(nfc_fw_download_done); |
9674da87 | 81 | |
8b3fe7b5 IE |
82 | /** |
83 | * nfc_dev_up - turn on the NFC device | |
84 | * | |
85 | * @dev: The nfc device to be turned on | |
86 | * | |
87 | * The device remains up until the nfc_dev_down function is called. | |
88 | */ | |
89 | int nfc_dev_up(struct nfc_dev *dev) | |
90 | { | |
91 | int rc = 0; | |
92 | ||
20c239c1 | 93 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
8b3fe7b5 IE |
94 | |
95 | device_lock(&dev->dev); | |
96 | ||
da5c0f11 | 97 | if (dev->shutting_down) { |
3e3b5dfc | 98 | rc = -ENODEV; |
be055b2f SO |
99 | goto error; |
100 | } | |
101 | ||
3e3b5dfc LM |
102 | if (dev->rfkill && rfkill_blocked(dev->rfkill)) { |
103 | rc = -ERFKILL; | |
8b3fe7b5 IE |
104 | goto error; |
105 | } | |
106 | ||
9ea7187c | 107 | if (dev->fw_download_in_progress) { |
9674da87 EL |
108 | rc = -EBUSY; |
109 | goto error; | |
110 | } | |
111 | ||
8b3fe7b5 IE |
112 | if (dev->dev_up) { |
113 | rc = -EALREADY; | |
114 | goto error; | |
115 | } | |
116 | ||
117 | if (dev->ops->dev_up) | |
118 | rc = dev->ops->dev_up(dev); | |
119 | ||
120 | if (!rc) | |
121 | dev->dev_up = true; | |
122 | ||
0a946301 | 123 | /* We have to enable the device before discovering SEs */ |
a434c240 SO |
124 | if (dev->ops->discover_se && dev->ops->discover_se(dev)) |
125 | pr_err("SE discovery failed\n"); | |
0a946301 | 126 | |
8b3fe7b5 IE |
127 | error: |
128 | device_unlock(&dev->dev); | |
129 | return rc; | |
130 | } | |
131 | ||
132 | /** | |
133 | * nfc_dev_down - turn off the NFC device | |
134 | * | |
135 | * @dev: The nfc device to be turned off | |
136 | */ | |
137 | int nfc_dev_down(struct nfc_dev *dev) | |
138 | { | |
139 | int rc = 0; | |
140 | ||
20c239c1 | 141 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
8b3fe7b5 IE |
142 | |
143 | device_lock(&dev->dev); | |
144 | ||
da5c0f11 | 145 | if (dev->shutting_down) { |
8b3fe7b5 IE |
146 | rc = -ENODEV; |
147 | goto error; | |
148 | } | |
149 | ||
150 | if (!dev->dev_up) { | |
151 | rc = -EALREADY; | |
152 | goto error; | |
153 | } | |
154 | ||
90099433 | 155 | if (dev->polling || dev->active_target) { |
8b3fe7b5 IE |
156 | rc = -EBUSY; |
157 | goto error; | |
158 | } | |
159 | ||
160 | if (dev->ops->dev_down) | |
161 | dev->ops->dev_down(dev); | |
162 | ||
163 | dev->dev_up = false; | |
164 | ||
165 | error: | |
166 | device_unlock(&dev->dev); | |
167 | return rc; | |
168 | } | |
169 | ||
be055b2f SO |
170 | static int nfc_rfkill_set_block(void *data, bool blocked) |
171 | { | |
172 | struct nfc_dev *dev = data; | |
173 | ||
174 | pr_debug("%s blocked %d", dev_name(&dev->dev), blocked); | |
175 | ||
176 | if (!blocked) | |
177 | return 0; | |
178 | ||
179 | nfc_dev_down(dev); | |
180 | ||
181 | return 0; | |
182 | } | |
183 | ||
184 | static const struct rfkill_ops nfc_rfkill_ops = { | |
185 | .set_block = nfc_rfkill_set_block, | |
186 | }; | |
187 | ||
3e256b8f LRV |
188 | /** |
189 | * nfc_start_poll - start polling for nfc targets | |
190 | * | |
191 | * @dev: The nfc device that must start polling | |
7cdda1c1 AL |
192 | * @im_protocols: bitset of nfc initiator protocols to be used for polling |
193 | * @tm_protocols: bitset of nfc transport protocols to be used for polling | |
3e256b8f LRV |
194 | * |
195 | * The device remains polling for targets until a target is found or | |
196 | * the nfc_stop_poll function is called. | |
197 | */ | |
fe7c5800 | 198 | int nfc_start_poll(struct nfc_dev *dev, u32 im_protocols, u32 tm_protocols) |
3e256b8f LRV |
199 | { |
200 | int rc; | |
201 | ||
fe7c5800 SO |
202 | pr_debug("dev_name %s initiator protocols 0x%x target protocols 0x%x\n", |
203 | dev_name(&dev->dev), im_protocols, tm_protocols); | |
3e256b8f | 204 | |
fe7c5800 | 205 | if (!im_protocols && !tm_protocols) |
3e256b8f LRV |
206 | return -EINVAL; |
207 | ||
208 | device_lock(&dev->dev); | |
209 | ||
da5c0f11 | 210 | if (dev->shutting_down) { |
3e256b8f LRV |
211 | rc = -ENODEV; |
212 | goto error; | |
213 | } | |
214 | ||
7757dc8a SO |
215 | if (!dev->dev_up) { |
216 | rc = -ENODEV; | |
217 | goto error; | |
218 | } | |
219 | ||
3e256b8f LRV |
220 | if (dev->polling) { |
221 | rc = -EBUSY; | |
222 | goto error; | |
223 | } | |
224 | ||
fe7c5800 | 225 | rc = dev->ops->start_poll(dev, im_protocols, tm_protocols); |
f212ad5e | 226 | if (!rc) { |
3e256b8f | 227 | dev->polling = true; |
f212ad5e SO |
228 | dev->rf_mode = NFC_RF_NONE; |
229 | } | |
3e256b8f LRV |
230 | |
231 | error: | |
232 | device_unlock(&dev->dev); | |
233 | return rc; | |
234 | } | |
235 | ||
236 | /** | |
237 | * nfc_stop_poll - stop polling for nfc targets | |
238 | * | |
239 | * @dev: The nfc device that must stop polling | |
240 | */ | |
241 | int nfc_stop_poll(struct nfc_dev *dev) | |
242 | { | |
243 | int rc = 0; | |
244 | ||
20c239c1 | 245 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
3e256b8f LRV |
246 | |
247 | device_lock(&dev->dev); | |
248 | ||
da5c0f11 | 249 | if (dev->shutting_down) { |
3e256b8f LRV |
250 | rc = -ENODEV; |
251 | goto error; | |
252 | } | |
253 | ||
254 | if (!dev->polling) { | |
255 | rc = -EINVAL; | |
256 | goto error; | |
257 | } | |
258 | ||
259 | dev->ops->stop_poll(dev); | |
260 | dev->polling = false; | |
5bcf099c | 261 | dev->rf_mode = NFC_RF_NONE; |
3e256b8f LRV |
262 | |
263 | error: | |
264 | device_unlock(&dev->dev); | |
265 | return rc; | |
266 | } | |
267 | ||
90099433 EL |
268 | static struct nfc_target *nfc_find_target(struct nfc_dev *dev, u32 target_idx) |
269 | { | |
270 | int i; | |
271 | ||
0f450772 | 272 | for (i = 0; i < dev->n_targets; i++) { |
90099433 EL |
273 | if (dev->targets[i].idx == target_idx) |
274 | return &dev->targets[i]; | |
275 | } | |
276 | ||
277 | return NULL; | |
278 | } | |
279 | ||
47807d3d | 280 | int nfc_dep_link_up(struct nfc_dev *dev, int target_index, u8 comm_mode) |
1ed28f61 SO |
281 | { |
282 | int rc = 0; | |
47807d3d SO |
283 | u8 *gb; |
284 | size_t gb_len; | |
90099433 | 285 | struct nfc_target *target; |
1ed28f61 | 286 | |
47807d3d | 287 | pr_debug("dev_name=%s comm %d\n", dev_name(&dev->dev), comm_mode); |
1ed28f61 SO |
288 | |
289 | if (!dev->ops->dep_link_up) | |
290 | return -EOPNOTSUPP; | |
291 | ||
292 | device_lock(&dev->dev); | |
293 | ||
da5c0f11 | 294 | if (dev->shutting_down) { |
1ed28f61 SO |
295 | rc = -ENODEV; |
296 | goto error; | |
297 | } | |
298 | ||
299 | if (dev->dep_link_up == true) { | |
300 | rc = -EALREADY; | |
301 | goto error; | |
302 | } | |
303 | ||
47807d3d SO |
304 | gb = nfc_llcp_general_bytes(dev, &gb_len); |
305 | if (gb_len > NFC_MAX_GT_LEN) { | |
306 | rc = -EINVAL; | |
307 | goto error; | |
308 | } | |
309 | ||
90099433 EL |
310 | target = nfc_find_target(dev, target_index); |
311 | if (target == NULL) { | |
312 | rc = -ENOTCONN; | |
313 | goto error; | |
314 | } | |
315 | ||
316 | rc = dev->ops->dep_link_up(dev, target, comm_mode, gb, gb_len); | |
f212ad5e | 317 | if (!rc) { |
90099433 | 318 | dev->active_target = target; |
f212ad5e SO |
319 | dev->rf_mode = NFC_RF_INITIATOR; |
320 | } | |
1ed28f61 SO |
321 | |
322 | error: | |
323 | device_unlock(&dev->dev); | |
324 | return rc; | |
325 | } | |
326 | ||
327 | int nfc_dep_link_down(struct nfc_dev *dev) | |
328 | { | |
329 | int rc = 0; | |
330 | ||
331 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); | |
332 | ||
333 | if (!dev->ops->dep_link_down) | |
334 | return -EOPNOTSUPP; | |
335 | ||
336 | device_lock(&dev->dev); | |
337 | ||
da5c0f11 | 338 | if (dev->shutting_down) { |
1ed28f61 SO |
339 | rc = -ENODEV; |
340 | goto error; | |
341 | } | |
342 | ||
343 | if (dev->dep_link_up == false) { | |
344 | rc = -EALREADY; | |
345 | goto error; | |
346 | } | |
347 | ||
1ed28f61 SO |
348 | rc = dev->ops->dep_link_down(dev); |
349 | if (!rc) { | |
350 | dev->dep_link_up = false; | |
90099433 | 351 | dev->active_target = NULL; |
5bcf099c | 352 | dev->rf_mode = NFC_RF_NONE; |
d646960f | 353 | nfc_llcp_mac_is_down(dev); |
1ed28f61 SO |
354 | nfc_genl_dep_link_down_event(dev); |
355 | } | |
356 | ||
357 | error: | |
358 | device_unlock(&dev->dev); | |
5bcf099c | 359 | |
1ed28f61 SO |
360 | return rc; |
361 | } | |
362 | ||
363 | int nfc_dep_link_is_up(struct nfc_dev *dev, u32 target_idx, | |
0a40acb2 | 364 | u8 comm_mode, u8 rf_mode) |
1ed28f61 SO |
365 | { |
366 | dev->dep_link_up = true; | |
1ed28f61 | 367 | |
d31652a2 | 368 | if (!dev->active_target && rf_mode == NFC_RF_INITIATOR) { |
e29a9e2a SO |
369 | struct nfc_target *target; |
370 | ||
371 | target = nfc_find_target(dev, target_idx); | |
372 | if (target == NULL) | |
373 | return -ENOTCONN; | |
374 | ||
375 | dev->active_target = target; | |
376 | } | |
377 | ||
378 | dev->polling = false; | |
379 | dev->rf_mode = rf_mode; | |
380 | ||
d646960f SO |
381 | nfc_llcp_mac_is_up(dev, target_idx, comm_mode, rf_mode); |
382 | ||
1ed28f61 SO |
383 | return nfc_genl_dep_link_up_event(dev, target_idx, comm_mode, rf_mode); |
384 | } | |
385 | EXPORT_SYMBOL(nfc_dep_link_is_up); | |
386 | ||
3e256b8f LRV |
387 | /** |
388 | * nfc_activate_target - prepare the target for data exchange | |
389 | * | |
390 | * @dev: The nfc device that found the target | |
391 | * @target_idx: index of the target that must be activated | |
392 | * @protocol: nfc protocol that will be used for data exchange | |
393 | */ | |
394 | int nfc_activate_target(struct nfc_dev *dev, u32 target_idx, u32 protocol) | |
395 | { | |
396 | int rc; | |
90099433 | 397 | struct nfc_target *target; |
3e256b8f | 398 | |
20c239c1 JP |
399 | pr_debug("dev_name=%s target_idx=%u protocol=%u\n", |
400 | dev_name(&dev->dev), target_idx, protocol); | |
3e256b8f LRV |
401 | |
402 | device_lock(&dev->dev); | |
403 | ||
da5c0f11 | 404 | if (dev->shutting_down) { |
3e256b8f LRV |
405 | rc = -ENODEV; |
406 | goto error; | |
407 | } | |
408 | ||
90099433 EL |
409 | if (dev->active_target) { |
410 | rc = -EBUSY; | |
411 | goto error; | |
412 | } | |
413 | ||
414 | target = nfc_find_target(dev, target_idx); | |
415 | if (target == NULL) { | |
416 | rc = -ENOTCONN; | |
417 | goto error; | |
418 | } | |
419 | ||
420 | rc = dev->ops->activate_target(dev, target, protocol); | |
c8d56ae7 | 421 | if (!rc) { |
90099433 | 422 | dev->active_target = target; |
f212ad5e | 423 | dev->rf_mode = NFC_RF_INITIATOR; |
3e256b8f | 424 | |
f0c91038 | 425 | if (dev->ops->check_presence && !dev->shutting_down) |
c8d56ae7 EL |
426 | mod_timer(&dev->check_pres_timer, jiffies + |
427 | msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS)); | |
428 | } | |
3e256b8f LRV |
429 | |
430 | error: | |
431 | device_unlock(&dev->dev); | |
432 | return rc; | |
433 | } | |
434 | ||
435 | /** | |
436 | * nfc_deactivate_target - deactivate a nfc target | |
437 | * | |
438 | * @dev: The nfc device that found the target | |
439 | * @target_idx: index of the target that must be deactivated | |
7cdda1c1 | 440 | * @mode: idle or sleep? |
3e256b8f | 441 | */ |
96d4581f | 442 | int nfc_deactivate_target(struct nfc_dev *dev, u32 target_idx, u8 mode) |
3e256b8f LRV |
443 | { |
444 | int rc = 0; | |
445 | ||
20c239c1 JP |
446 | pr_debug("dev_name=%s target_idx=%u\n", |
447 | dev_name(&dev->dev), target_idx); | |
3e256b8f LRV |
448 | |
449 | device_lock(&dev->dev); | |
450 | ||
da5c0f11 | 451 | if (dev->shutting_down) { |
3e256b8f LRV |
452 | rc = -ENODEV; |
453 | goto error; | |
454 | } | |
455 | ||
90099433 EL |
456 | if (dev->active_target == NULL) { |
457 | rc = -ENOTCONN; | |
458 | goto error; | |
459 | } | |
460 | ||
461 | if (dev->active_target->idx != target_idx) { | |
462 | rc = -ENOTCONN; | |
463 | goto error; | |
464 | } | |
465 | ||
c8d56ae7 EL |
466 | if (dev->ops->check_presence) |
467 | del_timer_sync(&dev->check_pres_timer); | |
468 | ||
96d4581f | 469 | dev->ops->deactivate_target(dev, dev->active_target, mode); |
90099433 | 470 | dev->active_target = NULL; |
3e256b8f LRV |
471 | |
472 | error: | |
473 | device_unlock(&dev->dev); | |
474 | return rc; | |
475 | } | |
476 | ||
477 | /** | |
478 | * nfc_data_exchange - transceive data | |
479 | * | |
480 | * @dev: The nfc device that found the target | |
481 | * @target_idx: index of the target | |
482 | * @skb: data to be sent | |
483 | * @cb: callback called when the response is received | |
484 | * @cb_context: parameter for the callback function | |
485 | * | |
486 | * The user must wait for the callback before calling this function again. | |
487 | */ | |
0a40acb2 SO |
488 | int nfc_data_exchange(struct nfc_dev *dev, u32 target_idx, struct sk_buff *skb, |
489 | data_exchange_cb_t cb, void *cb_context) | |
3e256b8f LRV |
490 | { |
491 | int rc; | |
492 | ||
20c239c1 JP |
493 | pr_debug("dev_name=%s target_idx=%u skb->len=%u\n", |
494 | dev_name(&dev->dev), target_idx, skb->len); | |
3e256b8f LRV |
495 | |
496 | device_lock(&dev->dev); | |
497 | ||
da5c0f11 | 498 | if (dev->shutting_down) { |
3e256b8f LRV |
499 | rc = -ENODEV; |
500 | kfree_skb(skb); | |
501 | goto error; | |
502 | } | |
503 | ||
be9ae4ce SO |
504 | if (dev->rf_mode == NFC_RF_INITIATOR && dev->active_target != NULL) { |
505 | if (dev->active_target->idx != target_idx) { | |
506 | rc = -EADDRNOTAVAIL; | |
507 | kfree_skb(skb); | |
508 | goto error; | |
509 | } | |
144612ca | 510 | |
be9ae4ce SO |
511 | if (dev->ops->check_presence) |
512 | del_timer_sync(&dev->check_pres_timer); | |
513 | ||
514 | rc = dev->ops->im_transceive(dev, dev->active_target, skb, cb, | |
515 | cb_context); | |
516 | ||
f0c91038 | 517 | if (!rc && dev->ops->check_presence && !dev->shutting_down) |
be9ae4ce SO |
518 | mod_timer(&dev->check_pres_timer, jiffies + |
519 | msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS)); | |
520 | } else if (dev->rf_mode == NFC_RF_TARGET && dev->ops->tm_send != NULL) { | |
521 | rc = dev->ops->tm_send(dev, skb); | |
522 | } else { | |
523 | rc = -ENOTCONN; | |
144612ca EL |
524 | kfree_skb(skb); |
525 | goto error; | |
526 | } | |
527 | ||
c8d56ae7 | 528 | |
3e256b8f LRV |
529 | error: |
530 | device_unlock(&dev->dev); | |
531 | return rc; | |
532 | } | |
533 | ||
d8eb18ee | 534 | struct nfc_se *nfc_find_se(struct nfc_dev *dev, u32 se_idx) |
c531c9ec | 535 | { |
156cef80 | 536 | struct nfc_se *se; |
c531c9ec | 537 | |
156cef80 | 538 | list_for_each_entry(se, &dev->secure_elements, list) |
c531c9ec SO |
539 | if (se->idx == se_idx) |
540 | return se; | |
541 | ||
542 | return NULL; | |
543 | } | |
d8eb18ee | 544 | EXPORT_SYMBOL(nfc_find_se); |
c531c9ec SO |
545 | |
546 | int nfc_enable_se(struct nfc_dev *dev, u32 se_idx) | |
547 | { | |
c531c9ec SO |
548 | struct nfc_se *se; |
549 | int rc; | |
550 | ||
551 | pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); | |
552 | ||
553 | device_lock(&dev->dev); | |
554 | ||
da5c0f11 | 555 | if (dev->shutting_down) { |
c531c9ec SO |
556 | rc = -ENODEV; |
557 | goto error; | |
558 | } | |
559 | ||
560 | if (!dev->dev_up) { | |
561 | rc = -ENODEV; | |
562 | goto error; | |
563 | } | |
564 | ||
565 | if (dev->polling) { | |
566 | rc = -EBUSY; | |
567 | goto error; | |
568 | } | |
569 | ||
570 | if (!dev->ops->enable_se || !dev->ops->disable_se) { | |
571 | rc = -EOPNOTSUPP; | |
572 | goto error; | |
573 | } | |
574 | ||
d8eb18ee | 575 | se = nfc_find_se(dev, se_idx); |
c531c9ec SO |
576 | if (!se) { |
577 | rc = -EINVAL; | |
578 | goto error; | |
579 | } | |
580 | ||
2c383283 | 581 | if (se->state == NFC_SE_ENABLED) { |
c531c9ec SO |
582 | rc = -EALREADY; |
583 | goto error; | |
584 | } | |
585 | ||
586 | rc = dev->ops->enable_se(dev, se_idx); | |
39525ee1 AW |
587 | if (rc >= 0) |
588 | se->state = NFC_SE_ENABLED; | |
c531c9ec SO |
589 | |
590 | error: | |
591 | device_unlock(&dev->dev); | |
592 | return rc; | |
593 | } | |
594 | ||
595 | int nfc_disable_se(struct nfc_dev *dev, u32 se_idx) | |
596 | { | |
c531c9ec SO |
597 | struct nfc_se *se; |
598 | int rc; | |
599 | ||
600 | pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); | |
601 | ||
602 | device_lock(&dev->dev); | |
603 | ||
da5c0f11 | 604 | if (dev->shutting_down) { |
c531c9ec SO |
605 | rc = -ENODEV; |
606 | goto error; | |
607 | } | |
608 | ||
609 | if (!dev->dev_up) { | |
610 | rc = -ENODEV; | |
611 | goto error; | |
612 | } | |
613 | ||
614 | if (!dev->ops->enable_se || !dev->ops->disable_se) { | |
615 | rc = -EOPNOTSUPP; | |
616 | goto error; | |
617 | } | |
618 | ||
d8eb18ee | 619 | se = nfc_find_se(dev, se_idx); |
c531c9ec SO |
620 | if (!se) { |
621 | rc = -EINVAL; | |
622 | goto error; | |
623 | } | |
624 | ||
2c383283 | 625 | if (se->state == NFC_SE_DISABLED) { |
c531c9ec SO |
626 | rc = -EALREADY; |
627 | goto error; | |
628 | } | |
629 | ||
630 | rc = dev->ops->disable_se(dev, se_idx); | |
39525ee1 AW |
631 | if (rc >= 0) |
632 | se->state = NFC_SE_DISABLED; | |
c531c9ec SO |
633 | |
634 | error: | |
635 | device_unlock(&dev->dev); | |
636 | return rc; | |
637 | } | |
638 | ||
3df40eb3 | 639 | int nfc_set_remote_general_bytes(struct nfc_dev *dev, const u8 *gb, u8 gb_len) |
541d920b | 640 | { |
0a40acb2 | 641 | pr_debug("dev_name=%s gb_len=%d\n", dev_name(&dev->dev), gb_len); |
541d920b | 642 | |
d646960f | 643 | return nfc_llcp_set_remote_gb(dev, gb, gb_len); |
541d920b SO |
644 | } |
645 | EXPORT_SYMBOL(nfc_set_remote_general_bytes); | |
646 | ||
ab73b751 SO |
647 | u8 *nfc_get_local_general_bytes(struct nfc_dev *dev, size_t *gb_len) |
648 | { | |
649 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); | |
650 | ||
651 | return nfc_llcp_general_bytes(dev, gb_len); | |
652 | } | |
653 | EXPORT_SYMBOL(nfc_get_local_general_bytes); | |
654 | ||
73167ced SO |
655 | int nfc_tm_data_received(struct nfc_dev *dev, struct sk_buff *skb) |
656 | { | |
657 | /* Only LLCP target mode for now */ | |
658 | if (dev->dep_link_up == false) { | |
659 | kfree_skb(skb); | |
660 | return -ENOLINK; | |
661 | } | |
662 | ||
663 | return nfc_llcp_data_received(dev, skb); | |
664 | } | |
665 | EXPORT_SYMBOL(nfc_tm_data_received); | |
666 | ||
fc40a8c1 | 667 | int nfc_tm_activated(struct nfc_dev *dev, u32 protocol, u8 comm_mode, |
3df40eb3 | 668 | const u8 *gb, size_t gb_len) |
fc40a8c1 SO |
669 | { |
670 | int rc; | |
671 | ||
672 | device_lock(&dev->dev); | |
673 | ||
674 | dev->polling = false; | |
675 | ||
676 | if (gb != NULL) { | |
677 | rc = nfc_set_remote_general_bytes(dev, gb, gb_len); | |
678 | if (rc < 0) | |
679 | goto out; | |
680 | } | |
681 | ||
f212ad5e SO |
682 | dev->rf_mode = NFC_RF_TARGET; |
683 | ||
fc40a8c1 SO |
684 | if (protocol == NFC_PROTO_NFC_DEP_MASK) |
685 | nfc_dep_link_is_up(dev, 0, comm_mode, NFC_RF_TARGET); | |
686 | ||
687 | rc = nfc_genl_tm_activated(dev, protocol); | |
688 | ||
689 | out: | |
690 | device_unlock(&dev->dev); | |
691 | ||
692 | return rc; | |
693 | } | |
694 | EXPORT_SYMBOL(nfc_tm_activated); | |
695 | ||
696 | int nfc_tm_deactivated(struct nfc_dev *dev) | |
697 | { | |
698 | dev->dep_link_up = false; | |
5bcf099c | 699 | dev->rf_mode = NFC_RF_NONE; |
fc40a8c1 SO |
700 | |
701 | return nfc_genl_tm_deactivated(dev); | |
702 | } | |
703 | EXPORT_SYMBOL(nfc_tm_deactivated); | |
704 | ||
3e256b8f | 705 | /** |
7c7cd3bf | 706 | * nfc_alloc_send_skb - allocate a skb for data exchange responses |
3e256b8f | 707 | * |
7cdda1c1 AL |
708 | * @dev: device sending the response |
709 | * @sk: socket sending the response | |
710 | * @flags: MSG_DONTWAIT flag | |
3e256b8f | 711 | * @size: size to allocate |
7cdda1c1 | 712 | * @err: pointer to memory to store the error code |
3e256b8f | 713 | */ |
7c7cd3bf | 714 | struct sk_buff *nfc_alloc_send_skb(struct nfc_dev *dev, struct sock *sk, |
0a40acb2 SO |
715 | unsigned int flags, unsigned int size, |
716 | unsigned int *err) | |
7c7cd3bf SO |
717 | { |
718 | struct sk_buff *skb; | |
719 | unsigned int total_size; | |
720 | ||
721 | total_size = size + | |
722 | dev->tx_headroom + dev->tx_tailroom + NFC_HEADER_SIZE; | |
723 | ||
724 | skb = sock_alloc_send_skb(sk, total_size, flags & MSG_DONTWAIT, err); | |
725 | if (skb) | |
726 | skb_reserve(skb, dev->tx_headroom + NFC_HEADER_SIZE); | |
727 | ||
728 | return skb; | |
729 | } | |
730 | ||
731 | /** | |
732 | * nfc_alloc_recv_skb - allocate a skb for data exchange responses | |
733 | * | |
734 | * @size: size to allocate | |
735 | * @gfp: gfp flags | |
736 | */ | |
737 | struct sk_buff *nfc_alloc_recv_skb(unsigned int size, gfp_t gfp) | |
3e256b8f LRV |
738 | { |
739 | struct sk_buff *skb; | |
740 | unsigned int total_size; | |
741 | ||
742 | total_size = size + 1; | |
743 | skb = alloc_skb(total_size, gfp); | |
744 | ||
745 | if (skb) | |
746 | skb_reserve(skb, 1); | |
747 | ||
748 | return skb; | |
749 | } | |
7c7cd3bf | 750 | EXPORT_SYMBOL(nfc_alloc_recv_skb); |
3e256b8f | 751 | |
4d12b8b1 LRV |
752 | /** |
753 | * nfc_targets_found - inform that targets were found | |
754 | * | |
755 | * @dev: The nfc device that found the targets | |
756 | * @targets: array of nfc targets found | |
ffbab1c9 | 757 | * @n_targets: targets array size |
4d12b8b1 LRV |
758 | * |
759 | * The device driver must call this function when one or many nfc targets | |
760 | * are found. After calling this function, the device driver must stop | |
761 | * polling for targets. | |
d94f9c55 EL |
762 | * NOTE: This function can be called with targets=NULL and n_targets=0 to |
763 | * notify a driver error, meaning that the polling operation cannot complete. | |
d4ccb132 EL |
764 | * IMPORTANT: this function must not be called from an atomic context. |
765 | * In addition, it must also not be called from a context that would prevent | |
766 | * the NFC Core to call other nfc ops entry point concurrently. | |
4d12b8b1 | 767 | */ |
0a40acb2 SO |
768 | int nfc_targets_found(struct nfc_dev *dev, |
769 | struct nfc_target *targets, int n_targets) | |
4d12b8b1 | 770 | { |
c4fbb651 SO |
771 | int i; |
772 | ||
20c239c1 | 773 | pr_debug("dev_name=%s n_targets=%d\n", dev_name(&dev->dev), n_targets); |
4d12b8b1 | 774 | |
c4fbb651 | 775 | for (i = 0; i < n_targets; i++) |
01ae0eea | 776 | targets[i].idx = dev->target_next_idx++; |
c4fbb651 | 777 | |
d4ccb132 | 778 | device_lock(&dev->dev); |
4d12b8b1 | 779 | |
8668fdd6 EL |
780 | if (dev->polling == false) { |
781 | device_unlock(&dev->dev); | |
782 | return 0; | |
783 | } | |
784 | ||
785 | dev->polling = false; | |
786 | ||
4d12b8b1 LRV |
787 | dev->targets_generation++; |
788 | ||
789 | kfree(dev->targets); | |
d94f9c55 | 790 | dev->targets = NULL; |
4d12b8b1 | 791 | |
d94f9c55 EL |
792 | if (targets) { |
793 | dev->targets = kmemdup(targets, | |
794 | n_targets * sizeof(struct nfc_target), | |
795 | GFP_ATOMIC); | |
796 | ||
797 | if (!dev->targets) { | |
798 | dev->n_targets = 0; | |
799 | device_unlock(&dev->dev); | |
800 | return -ENOMEM; | |
801 | } | |
4d12b8b1 LRV |
802 | } |
803 | ||
804 | dev->n_targets = n_targets; | |
d4ccb132 | 805 | device_unlock(&dev->dev); |
4d12b8b1 LRV |
806 | |
807 | nfc_genl_targets_found(dev); | |
808 | ||
809 | return 0; | |
810 | } | |
811 | EXPORT_SYMBOL(nfc_targets_found); | |
812 | ||
d4ccb132 EL |
813 | /** |
814 | * nfc_target_lost - inform that an activated target went out of field | |
815 | * | |
816 | * @dev: The nfc device that had the activated target in field | |
817 | * @target_idx: the nfc index of the target | |
818 | * | |
819 | * The device driver must call this function when the activated target | |
820 | * goes out of the field. | |
821 | * IMPORTANT: this function must not be called from an atomic context. | |
822 | * In addition, it must also not be called from a context that would prevent | |
823 | * the NFC Core to call other nfc ops entry point concurrently. | |
824 | */ | |
e1da0efa EL |
825 | int nfc_target_lost(struct nfc_dev *dev, u32 target_idx) |
826 | { | |
f2479c0a | 827 | const struct nfc_target *tg; |
e1da0efa EL |
828 | int i; |
829 | ||
830 | pr_debug("dev_name %s n_target %d\n", dev_name(&dev->dev), target_idx); | |
831 | ||
d4ccb132 | 832 | device_lock(&dev->dev); |
e1da0efa EL |
833 | |
834 | for (i = 0; i < dev->n_targets; i++) { | |
835 | tg = &dev->targets[i]; | |
836 | if (tg->idx == target_idx) | |
837 | break; | |
838 | } | |
839 | ||
840 | if (i == dev->n_targets) { | |
d4ccb132 | 841 | device_unlock(&dev->dev); |
e1da0efa EL |
842 | return -EINVAL; |
843 | } | |
844 | ||
845 | dev->targets_generation++; | |
846 | dev->n_targets--; | |
90099433 | 847 | dev->active_target = NULL; |
e1da0efa EL |
848 | |
849 | if (dev->n_targets) { | |
850 | memcpy(&dev->targets[i], &dev->targets[i + 1], | |
851 | (dev->n_targets - i) * sizeof(struct nfc_target)); | |
852 | } else { | |
853 | kfree(dev->targets); | |
854 | dev->targets = NULL; | |
855 | } | |
856 | ||
d4ccb132 | 857 | device_unlock(&dev->dev); |
e1da0efa EL |
858 | |
859 | nfc_genl_target_lost(dev, target_idx); | |
860 | ||
861 | return 0; | |
862 | } | |
863 | EXPORT_SYMBOL(nfc_target_lost); | |
864 | ||
9eb334ac | 865 | inline void nfc_driver_failure(struct nfc_dev *dev, int err) |
456411ca | 866 | { |
9eb334ac | 867 | nfc_targets_found(dev, NULL, 0); |
456411ca EL |
868 | } |
869 | EXPORT_SYMBOL(nfc_driver_failure); | |
870 | ||
fed7c25e SO |
871 | int nfc_add_se(struct nfc_dev *dev, u32 se_idx, u16 type) |
872 | { | |
c531c9ec | 873 | struct nfc_se *se; |
2757c372 | 874 | int rc; |
fed7c25e SO |
875 | |
876 | pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); | |
877 | ||
d8eb18ee | 878 | se = nfc_find_se(dev, se_idx); |
c531c9ec SO |
879 | if (se) |
880 | return -EALREADY; | |
fed7c25e SO |
881 | |
882 | se = kzalloc(sizeof(struct nfc_se), GFP_KERNEL); | |
883 | if (!se) | |
884 | return -ENOMEM; | |
885 | ||
886 | se->idx = se_idx; | |
887 | se->type = type; | |
888 | se->state = NFC_SE_DISABLED; | |
889 | INIT_LIST_HEAD(&se->list); | |
890 | ||
891 | list_add(&se->list, &dev->secure_elements); | |
892 | ||
2757c372 SO |
893 | rc = nfc_genl_se_added(dev, se_idx, type); |
894 | if (rc < 0) { | |
895 | list_del(&se->list); | |
896 | kfree(se); | |
897 | ||
898 | return rc; | |
899 | } | |
900 | ||
fed7c25e SO |
901 | return 0; |
902 | } | |
903 | EXPORT_SYMBOL(nfc_add_se); | |
904 | ||
905 | int nfc_remove_se(struct nfc_dev *dev, u32 se_idx) | |
906 | { | |
907 | struct nfc_se *se, *n; | |
2757c372 | 908 | int rc; |
fed7c25e SO |
909 | |
910 | pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx); | |
911 | ||
912 | list_for_each_entry_safe(se, n, &dev->secure_elements, list) | |
913 | if (se->idx == se_idx) { | |
2757c372 SO |
914 | rc = nfc_genl_se_removed(dev, se_idx); |
915 | if (rc < 0) | |
916 | return rc; | |
917 | ||
fed7c25e SO |
918 | list_del(&se->list); |
919 | kfree(se); | |
920 | ||
921 | return 0; | |
922 | } | |
923 | ||
924 | return -EINVAL; | |
925 | } | |
926 | EXPORT_SYMBOL(nfc_remove_se); | |
927 | ||
447b27c4 CR |
928 | int nfc_se_transaction(struct nfc_dev *dev, u8 se_idx, |
929 | struct nfc_evt_transaction *evt_transaction) | |
930 | { | |
931 | int rc; | |
932 | ||
933 | pr_debug("transaction: %x\n", se_idx); | |
934 | ||
935 | device_lock(&dev->dev); | |
936 | ||
937 | if (!evt_transaction) { | |
938 | rc = -EPROTO; | |
939 | goto out; | |
940 | } | |
941 | ||
942 | rc = nfc_genl_se_transaction(dev, se_idx, evt_transaction); | |
943 | out: | |
944 | device_unlock(&dev->dev); | |
945 | return rc; | |
946 | } | |
947 | EXPORT_SYMBOL(nfc_se_transaction); | |
948 | ||
9afec6d3 CR |
949 | int nfc_se_connectivity(struct nfc_dev *dev, u8 se_idx) |
950 | { | |
951 | int rc; | |
952 | ||
953 | pr_debug("connectivity: %x\n", se_idx); | |
954 | ||
955 | device_lock(&dev->dev); | |
956 | rc = nfc_genl_se_connectivity(dev, se_idx); | |
957 | device_unlock(&dev->dev); | |
958 | return rc; | |
959 | } | |
960 | EXPORT_SYMBOL(nfc_se_connectivity); | |
961 | ||
3e256b8f LRV |
962 | static void nfc_release(struct device *d) |
963 | { | |
964 | struct nfc_dev *dev = to_nfc_dev(d); | |
ee656e9d | 965 | struct nfc_se *se, *n; |
3e256b8f | 966 | |
20c239c1 | 967 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
3e256b8f | 968 | |
4d12b8b1 LRV |
969 | nfc_genl_data_exit(&dev->genl_data); |
970 | kfree(dev->targets); | |
ee656e9d SO |
971 | |
972 | list_for_each_entry_safe(se, n, &dev->secure_elements, list) { | |
973 | nfc_genl_se_removed(dev, se->idx); | |
974 | list_del(&se->list); | |
975 | kfree(se); | |
976 | } | |
977 | ||
91179917 | 978 | ida_free(&nfc_index_ida, dev->idx); |
20777bc5 | 979 | |
3e256b8f LRV |
980 | kfree(dev); |
981 | } | |
982 | ||
c8d56ae7 EL |
983 | static void nfc_check_pres_work(struct work_struct *work) |
984 | { | |
985 | struct nfc_dev *dev = container_of(work, struct nfc_dev, | |
986 | check_pres_work); | |
987 | int rc; | |
988 | ||
989 | device_lock(&dev->dev); | |
990 | ||
90099433 EL |
991 | if (dev->active_target && timer_pending(&dev->check_pres_timer) == 0) { |
992 | rc = dev->ops->check_presence(dev, dev->active_target); | |
632c016a EL |
993 | if (rc == -EOPNOTSUPP) |
994 | goto exit; | |
f0c91038 | 995 | if (rc) { |
d4ccb132 EL |
996 | u32 active_target_idx = dev->active_target->idx; |
997 | device_unlock(&dev->dev); | |
998 | nfc_target_lost(dev, active_target_idx); | |
999 | return; | |
c8d56ae7 | 1000 | } |
f0c91038 EL |
1001 | |
1002 | if (!dev->shutting_down) | |
1003 | mod_timer(&dev->check_pres_timer, jiffies + | |
1004 | msecs_to_jiffies(NFC_CHECK_PRES_FREQ_MS)); | |
c8d56ae7 EL |
1005 | } |
1006 | ||
632c016a | 1007 | exit: |
c8d56ae7 EL |
1008 | device_unlock(&dev->dev); |
1009 | } | |
1010 | ||
4b519bb4 | 1011 | static void nfc_check_pres_timeout(struct timer_list *t) |
c8d56ae7 | 1012 | { |
4b519bb4 | 1013 | struct nfc_dev *dev = from_timer(dev, t, check_pres_timer); |
c8d56ae7 | 1014 | |
916082b0 | 1015 | schedule_work(&dev->check_pres_work); |
c8d56ae7 EL |
1016 | } |
1017 | ||
3e256b8f LRV |
1018 | struct class nfc_class = { |
1019 | .name = "nfc", | |
1020 | .dev_release = nfc_release, | |
1021 | }; | |
1022 | EXPORT_SYMBOL(nfc_class); | |
1023 | ||
9f3b795a | 1024 | static int match_idx(struct device *d, const void *data) |
3e256b8f LRV |
1025 | { |
1026 | struct nfc_dev *dev = to_nfc_dev(d); | |
9f3b795a | 1027 | const unsigned int *idx = data; |
3e256b8f LRV |
1028 | |
1029 | return dev->idx == *idx; | |
1030 | } | |
1031 | ||
95c96174 | 1032 | struct nfc_dev *nfc_get_device(unsigned int idx) |
3e256b8f LRV |
1033 | { |
1034 | struct device *d; | |
1035 | ||
1036 | d = class_find_device(&nfc_class, NULL, &idx, match_idx); | |
1037 | if (!d) | |
1038 | return NULL; | |
1039 | ||
1040 | return to_nfc_dev(d); | |
1041 | } | |
1042 | ||
1043 | /** | |
1044 | * nfc_allocate_device - allocate a new nfc device | |
1045 | * | |
1046 | * @ops: device operations | |
1047 | * @supported_protocols: NFC protocols supported by the device | |
7cdda1c1 AL |
1048 | * @tx_headroom: reserved space at beginning of skb |
1049 | * @tx_tailroom: reserved space at end of skb | |
3e256b8f | 1050 | */ |
f6c802a7 | 1051 | struct nfc_dev *nfc_allocate_device(const struct nfc_ops *ops, |
0a40acb2 SO |
1052 | u32 supported_protocols, |
1053 | int tx_headroom, int tx_tailroom) | |
3e256b8f | 1054 | { |
3e256b8f | 1055 | struct nfc_dev *dev; |
20777bc5 | 1056 | int rc; |
3e256b8f LRV |
1057 | |
1058 | if (!ops->start_poll || !ops->stop_poll || !ops->activate_target || | |
be9ae4ce | 1059 | !ops->deactivate_target || !ops->im_transceive) |
3e256b8f LRV |
1060 | return NULL; |
1061 | ||
1062 | if (!supported_protocols) | |
1063 | return NULL; | |
1064 | ||
1065 | dev = kzalloc(sizeof(struct nfc_dev), GFP_KERNEL); | |
1066 | if (!dev) | |
1067 | return NULL; | |
1068 | ||
91179917 | 1069 | rc = ida_alloc(&nfc_index_ida, GFP_KERNEL); |
20777bc5 JH |
1070 | if (rc < 0) |
1071 | goto err_free_dev; | |
1072 | dev->idx = rc; | |
1073 | ||
1074 | dev->dev.class = &nfc_class; | |
1075 | dev_set_name(&dev->dev, "nfc%d", dev->idx); | |
1076 | device_initialize(&dev->dev); | |
1077 | ||
3e256b8f LRV |
1078 | dev->ops = ops; |
1079 | dev->supported_protocols = supported_protocols; | |
e8753043 SO |
1080 | dev->tx_headroom = tx_headroom; |
1081 | dev->tx_tailroom = tx_tailroom; | |
fed7c25e | 1082 | INIT_LIST_HEAD(&dev->secure_elements); |
3e256b8f | 1083 | |
4d12b8b1 LRV |
1084 | nfc_genl_data_init(&dev->genl_data); |
1085 | ||
5bcf099c | 1086 | dev->rf_mode = NFC_RF_NONE; |
d4ccb132 | 1087 | |
4d12b8b1 LRV |
1088 | /* first generation must not be 0 */ |
1089 | dev->targets_generation = 1; | |
1090 | ||
c8d56ae7 | 1091 | if (ops->check_presence) { |
4b519bb4 | 1092 | timer_setup(&dev->check_pres_timer, nfc_check_pres_timeout, 0); |
c8d56ae7 | 1093 | INIT_WORK(&dev->check_pres_work, nfc_check_pres_work); |
c8d56ae7 EL |
1094 | } |
1095 | ||
3e256b8f | 1096 | return dev; |
20777bc5 JH |
1097 | |
1098 | err_free_dev: | |
1099 | kfree(dev); | |
1100 | ||
c45e3e4c | 1101 | return NULL; |
3e256b8f LRV |
1102 | } |
1103 | EXPORT_SYMBOL(nfc_allocate_device); | |
1104 | ||
1105 | /** | |
1106 | * nfc_register_device - register a nfc device in the nfc subsystem | |
1107 | * | |
1108 | * @dev: The nfc device to register | |
1109 | */ | |
1110 | int nfc_register_device(struct nfc_dev *dev) | |
1111 | { | |
1112 | int rc; | |
1113 | ||
20c239c1 | 1114 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
3e256b8f LRV |
1115 | |
1116 | mutex_lock(&nfc_devlist_mutex); | |
1117 | nfc_devlist_generation++; | |
1118 | rc = device_add(&dev->dev); | |
1119 | mutex_unlock(&nfc_devlist_mutex); | |
1120 | ||
4d12b8b1 LRV |
1121 | if (rc < 0) |
1122 | return rc; | |
1123 | ||
d646960f SO |
1124 | rc = nfc_llcp_register_device(dev); |
1125 | if (rc) | |
1126 | pr_err("Could not register llcp device\n"); | |
1127 | ||
3e3b5dfc | 1128 | device_lock(&dev->dev); |
be055b2f SO |
1129 | dev->rfkill = rfkill_alloc(dev_name(&dev->dev), &dev->dev, |
1130 | RFKILL_TYPE_NFC, &nfc_rfkill_ops, dev); | |
1131 | if (dev->rfkill) { | |
1132 | if (rfkill_register(dev->rfkill) < 0) { | |
1133 | rfkill_destroy(dev->rfkill); | |
1134 | dev->rfkill = NULL; | |
1135 | } | |
1136 | } | |
da5c0f11 | 1137 | dev->shutting_down = false; |
3e3b5dfc LM |
1138 | device_unlock(&dev->dev); |
1139 | ||
1140 | rc = nfc_genl_device_added(dev); | |
1141 | if (rc) | |
1142 | pr_debug("The userspace won't be notified that the device %s was added\n", | |
1143 | dev_name(&dev->dev)); | |
be055b2f | 1144 | |
4d12b8b1 | 1145 | return 0; |
3e256b8f LRV |
1146 | } |
1147 | EXPORT_SYMBOL(nfc_register_device); | |
1148 | ||
1149 | /** | |
1150 | * nfc_unregister_device - unregister a nfc device in the nfc subsystem | |
1151 | * | |
1152 | * @dev: The nfc device to unregister | |
1153 | */ | |
1154 | void nfc_unregister_device(struct nfc_dev *dev) | |
1155 | { | |
20777bc5 | 1156 | int rc; |
4d12b8b1 | 1157 | |
20c239c1 | 1158 | pr_debug("dev_name=%s\n", dev_name(&dev->dev)); |
3e256b8f | 1159 | |
3e3b5dfc LM |
1160 | rc = nfc_genl_device_removed(dev); |
1161 | if (rc) | |
1162 | pr_debug("The userspace won't be notified that the device %s " | |
1163 | "was removed\n", dev_name(&dev->dev)); | |
1164 | ||
1165 | device_lock(&dev->dev); | |
be055b2f SO |
1166 | if (dev->rfkill) { |
1167 | rfkill_unregister(dev->rfkill); | |
1168 | rfkill_destroy(dev->rfkill); | |
1b0e8141 | 1169 | dev->rfkill = NULL; |
be055b2f | 1170 | } |
da5c0f11 | 1171 | dev->shutting_down = true; |
3e3b5dfc | 1172 | device_unlock(&dev->dev); |
be055b2f | 1173 | |
f0c91038 | 1174 | if (dev->ops->check_presence) { |
f0c91038 EL |
1175 | del_timer_sync(&dev->check_pres_timer); |
1176 | cancel_work_sync(&dev->check_pres_work); | |
1177 | } | |
3e256b8f | 1178 | |
d646960f SO |
1179 | nfc_llcp_unregister_device(dev); |
1180 | ||
f0c91038 EL |
1181 | mutex_lock(&nfc_devlist_mutex); |
1182 | nfc_devlist_generation++; | |
1183 | device_del(&dev->dev); | |
1184 | mutex_unlock(&nfc_devlist_mutex); | |
3e256b8f LRV |
1185 | } |
1186 | EXPORT_SYMBOL(nfc_unregister_device); | |
1187 | ||
1188 | static int __init nfc_init(void) | |
1189 | { | |
4d12b8b1 LRV |
1190 | int rc; |
1191 | ||
ed1e0ad8 | 1192 | pr_info("NFC Core ver %s\n", VERSION); |
3e256b8f | 1193 | |
4d12b8b1 LRV |
1194 | rc = class_register(&nfc_class); |
1195 | if (rc) | |
1196 | return rc; | |
1197 | ||
1198 | rc = nfc_genl_init(); | |
1199 | if (rc) | |
1200 | goto err_genl; | |
1201 | ||
1202 | /* the first generation must not be 0 */ | |
1203 | nfc_devlist_generation = 1; | |
1204 | ||
23b7869c LRV |
1205 | rc = rawsock_init(); |
1206 | if (rc) | |
1207 | goto err_rawsock; | |
1208 | ||
d646960f SO |
1209 | rc = nfc_llcp_init(); |
1210 | if (rc) | |
1211 | goto err_llcp_sock; | |
1212 | ||
c7fe3b52 AAJ |
1213 | rc = af_nfc_init(); |
1214 | if (rc) | |
1215 | goto err_af_nfc; | |
1216 | ||
4d12b8b1 LRV |
1217 | return 0; |
1218 | ||
c7fe3b52 | 1219 | err_af_nfc: |
d646960f SO |
1220 | nfc_llcp_exit(); |
1221 | err_llcp_sock: | |
23b7869c LRV |
1222 | rawsock_exit(); |
1223 | err_rawsock: | |
c7fe3b52 | 1224 | nfc_genl_exit(); |
4d12b8b1 LRV |
1225 | err_genl: |
1226 | class_unregister(&nfc_class); | |
1227 | return rc; | |
3e256b8f LRV |
1228 | } |
1229 | ||
1230 | static void __exit nfc_exit(void) | |
1231 | { | |
c7fe3b52 | 1232 | af_nfc_exit(); |
d646960f | 1233 | nfc_llcp_exit(); |
23b7869c | 1234 | rawsock_exit(); |
4d12b8b1 | 1235 | nfc_genl_exit(); |
3e256b8f LRV |
1236 | class_unregister(&nfc_class); |
1237 | } | |
1238 | ||
1239 | subsys_initcall(nfc_init); | |
1240 | module_exit(nfc_exit); | |
1241 | ||
1242 | MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>"); | |
1243 | MODULE_DESCRIPTION("NFC Core ver " VERSION); | |
1244 | MODULE_VERSION(VERSION); | |
1245 | MODULE_LICENSE("GPL"); | |
1155bb61 | 1246 | MODULE_ALIAS_NETPROTO(PF_NFC); |
5df16cad | 1247 | MODULE_ALIAS_GENL_FAMILY(NFC_GENL_NAME); |