1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Driver for NXP PN533 NFC Chip - core functions |
4 | * |
5 | * Copyright (C) 2011 Instituto Nokia de Tecnologia |
6 | * Copyright (C) 2012-2013 Tieto Poland |
7 | */ |
8 | |
9 | #include <linux/device.h> |
10 | #include <linux/kernel.h> |
11 | #include <linux/module.h> |
12 | #include <linux/slab.h> |
13 | #include <linux/nfc.h> |
14 | #include <linux/netdevice.h> |
15 | #include <net/nfc/nfc.h> |
16 | #include "pn533.h" |
17 | |
18 | #define VERSION "0.3" |
19 | |
20 | /* How much time we spend listening for initiators */ |
21 | #define PN533_LISTEN_TIME 2 |
22 | /* Delay between each poll frame (ms) */ |
23 | #define PN533_POLL_INTERVAL 10 |
24 | |
25 | /* structs for pn533 commands */ |
26 | |
27 | /* PN533_CMD_GET_FIRMWARE_VERSION */ |
28 | struct pn533_fw_version { |
29 | u8 ic; |
30 | u8 ver; |
31 | u8 rev; |
32 | u8 support; |
33 | }; |
34 | |
35 | /* PN533_CMD_RF_CONFIGURATION */ |
36 | #define PN533_CFGITEM_RF_FIELD 0x01 |
37 | #define PN533_CFGITEM_TIMING 0x02 |
38 | #define PN533_CFGITEM_MAX_RETRIES 0x05 |
39 | #define PN533_CFGITEM_PASORI 0x82 |
40 | |
41 | #define PN533_CFGITEM_RF_FIELD_AUTO_RFCA 0x2 |
42 | #define PN533_CFGITEM_RF_FIELD_ON 0x1 |
43 | #define PN533_CFGITEM_RF_FIELD_OFF 0x0 |
44 | |
45 | #define PN533_CONFIG_TIMING_102 0xb |
46 | #define PN533_CONFIG_TIMING_204 0xc |
47 | #define PN533_CONFIG_TIMING_409 0xd |
48 | #define PN533_CONFIG_TIMING_819 0xe |
49 | |
50 | #define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00 |
51 | #define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF |
52 | |
53 | struct pn533_config_max_retries { |
54 | u8 mx_rty_atr; |
55 | u8 mx_rty_psl; |
56 | u8 mx_rty_passive_act; |
57 | } __packed; |
58 | |
59 | struct pn533_config_timing { |
60 | u8 rfu; |
61 | u8 atr_res_timeout; |
62 | u8 dep_timeout; |
63 | } __packed; |
64 | |
65 | /* PN533_CMD_IN_LIST_PASSIVE_TARGET */ |
66 | |
67 | /* felica commands opcode */ |
68 | #define PN533_FELICA_OPC_SENSF_REQ 0 |
69 | #define PN533_FELICA_OPC_SENSF_RES 1 |
70 | /* felica SENSF_REQ parameters */ |
71 | #define PN533_FELICA_SENSF_SC_ALL 0xFFFF |
72 | #define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0 |
73 | #define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1 |
74 | #define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2 |
75 | |
76 | /* type B initiator_data values */ |
77 | #define PN533_TYPE_B_AFI_ALL_FAMILIES 0 |
78 | #define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0 |
79 | #define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1 |
80 | |
81 | union pn533_cmd_poll_initdata { |
82 | struct { |
83 | u8 afi; |
84 | u8 polling_method; |
85 | } __packed type_b; |
86 | struct { |
87 | u8 opcode; |
88 | __be16 sc; |
89 | u8 rc; |
90 | u8 tsn; |
91 | } __packed felica; |
92 | }; |
93 | |
94 | struct pn533_poll_modulations { |
95 | struct { |
96 | u8 maxtg; |
97 | u8 brty; |
98 | union pn533_cmd_poll_initdata initiator_data; |
99 | } __packed data; |
100 | u8 len; |
101 | }; |
102 | |
103 | static const struct pn533_poll_modulations poll_mod[] = { |
104 | [PN533_POLL_MOD_106KBPS_A] = { |
105 | .data = { |
106 | .maxtg = 1, |
107 | .brty = 0, |
108 | }, |
109 | .len = 2, |
110 | }, |
111 | [PN533_POLL_MOD_212KBPS_FELICA] = { |
112 | .data = { |
113 | .maxtg = 1, |
114 | .brty = 1, |
115 | .initiator_data.felica = { |
116 | .opcode = PN533_FELICA_OPC_SENSF_REQ, |
117 | .sc = PN533_FELICA_SENSF_SC_ALL, |
118 | .rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE, |
119 | .tsn = 0x03, |
120 | }, |
121 | }, |
122 | .len = 7, |
123 | }, |
124 | [PN533_POLL_MOD_424KBPS_FELICA] = { |
125 | .data = { |
126 | .maxtg = 1, |
127 | .brty = 2, |
128 | .initiator_data.felica = { |
129 | .opcode = PN533_FELICA_OPC_SENSF_REQ, |
130 | .sc = PN533_FELICA_SENSF_SC_ALL, |
131 | .rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE, |
132 | .tsn = 0x03, |
133 | }, |
134 | }, |
135 | .len = 7, |
136 | }, |
137 | [PN533_POLL_MOD_106KBPS_JEWEL] = { |
138 | .data = { |
139 | .maxtg = 1, |
140 | .brty = 4, |
141 | }, |
142 | .len = 2, |
143 | }, |
144 | [PN533_POLL_MOD_847KBPS_B] = { |
145 | .data = { |
146 | .maxtg = 1, |
147 | .brty = 8, |
148 | .initiator_data.type_b = { |
149 | .afi = PN533_TYPE_B_AFI_ALL_FAMILIES, |
150 | .polling_method = |
151 | PN533_TYPE_B_POLL_METHOD_TIMESLOT, |
152 | }, |
153 | }, |
154 | .len = 3, |
155 | }, |
156 | [PN533_LISTEN_MOD] = { |
157 | .len = 0, |
158 | }, |
159 | }; |
160 | |
161 | /* PN533_CMD_IN_ATR */ |
162 | |
163 | struct pn533_cmd_activate_response { |
164 | u8 status; |
165 | u8 nfcid3t[10]; |
166 | u8 didt; |
167 | u8 bst; |
168 | u8 brt; |
169 | u8 to; |
170 | u8 ppt; |
171 | /* optional */ |
172 | u8 gt[]; |
173 | } __packed; |
174 | |
175 | struct pn533_cmd_jump_dep_response { |
176 | u8 status; |
177 | u8 tg; |
178 | u8 nfcid3t[10]; |
179 | u8 didt; |
180 | u8 bst; |
181 | u8 brt; |
182 | u8 to; |
183 | u8 ppt; |
184 | /* optional */ |
185 | u8 gt[]; |
186 | } __packed; |
187 | |
188 | struct pn532_autopoll_resp { |
189 | u8 type; |
190 | u8 ln; |
191 | u8 tg; |
192 | u8 tgdata[]; |
193 | }; |
194 | |
195 | /* PN532_CMD_IN_AUTOPOLL */ |
196 | #define PN532_AUTOPOLL_POLLNR_INFINITE 0xff |
197 | #define PN532_AUTOPOLL_PERIOD 0x03 /* in units of 150 ms */ |
198 | |
199 | #define PN532_AUTOPOLL_TYPE_GENERIC_106 0x00 |
200 | #define PN532_AUTOPOLL_TYPE_GENERIC_212 0x01 |
201 | #define PN532_AUTOPOLL_TYPE_GENERIC_424 0x02 |
202 | #define PN532_AUTOPOLL_TYPE_JEWEL 0x04 |
203 | #define PN532_AUTOPOLL_TYPE_MIFARE 0x10 |
204 | #define PN532_AUTOPOLL_TYPE_FELICA212 0x11 |
205 | #define PN532_AUTOPOLL_TYPE_FELICA424 0x12 |
206 | #define PN532_AUTOPOLL_TYPE_ISOA 0x20 |
207 | #define PN532_AUTOPOLL_TYPE_ISOB 0x23 |
208 | #define PN532_AUTOPOLL_TYPE_DEP_PASSIVE_106 0x40 |
209 | #define PN532_AUTOPOLL_TYPE_DEP_PASSIVE_212 0x41 |
210 | #define PN532_AUTOPOLL_TYPE_DEP_PASSIVE_424 0x42 |
211 | #define PN532_AUTOPOLL_TYPE_DEP_ACTIVE_106 0x80 |
212 | #define PN532_AUTOPOLL_TYPE_DEP_ACTIVE_212 0x81 |
213 | #define PN532_AUTOPOLL_TYPE_DEP_ACTIVE_424 0x82 |
214 | |
215 | /* PN533_TG_INIT_AS_TARGET */ |
216 | #define PN533_INIT_TARGET_PASSIVE 0x1 |
217 | #define PN533_INIT_TARGET_DEP 0x2 |
218 | |
219 | #define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3 |
220 | #define PN533_INIT_TARGET_RESP_ACTIVE 0x1 |
221 | #define PN533_INIT_TARGET_RESP_DEP 0x4 |
222 | |
223 | /* The rule: value(high byte) + value(low byte) + checksum = 0 */ |
224 | static inline u8 pn533_ext_checksum(u16 value) |
225 | { |
226 | return ~(u8)(((value & 0xFF00) >> 8) + (u8)(value & 0xFF)) + 1; |
227 | } |
228 | |
229 | /* The rule: value + checksum = 0 */ |
230 | static inline u8 pn533_std_checksum(u8 value) |
231 | { |
232 | return ~value + 1; |
233 | } |
234 | |
235 | /* The rule: sum(data elements) + checksum = 0 */ |
236 | static u8 pn533_std_data_checksum(u8 *data, int datalen) |
237 | { |
238 | u8 sum = 0; |
239 | int i; |
240 | |
241 | for (i = 0; i < datalen; i++) |
242 | sum += data[i]; |
243 | |
244 | return pn533_std_checksum(value: sum); |
245 | } |
246 | |
247 | static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code) |
248 | { |
249 | struct pn533_std_frame *frame = _frame; |
250 | |
251 | frame->preamble = 0; |
252 | frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF); |
253 | PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT; |
254 | PN533_FRAME_CMD(frame) = cmd_code; |
255 | frame->datalen = 2; |
256 | } |
257 | |
258 | static void pn533_std_tx_frame_finish(void *_frame) |
259 | { |
260 | struct pn533_std_frame *frame = _frame; |
261 | |
262 | frame->datalen_checksum = pn533_std_checksum(value: frame->datalen); |
263 | |
264 | PN533_STD_FRAME_CHECKSUM(frame) = |
265 | pn533_std_data_checksum(data: frame->data, datalen: frame->datalen); |
266 | |
267 | PN533_STD_FRAME_POSTAMBLE(frame) = 0; |
268 | } |
269 | |
270 | static void pn533_std_tx_update_payload_len(void *_frame, int len) |
271 | { |
272 | struct pn533_std_frame *frame = _frame; |
273 | |
274 | frame->datalen += len; |
275 | } |
276 | |
277 | static bool pn533_std_rx_frame_is_valid(void *_frame, struct pn533 *dev) |
278 | { |
279 | u8 checksum; |
280 | struct pn533_std_frame *stdf = _frame; |
281 | |
282 | if (stdf->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF)) |
283 | return false; |
284 | |
285 | if (likely(!PN533_STD_IS_EXTENDED(stdf))) { |
286 | /* Standard frame code */ |
287 | dev->ops->rx_header_len = PN533_STD_FRAME_HEADER_LEN; |
288 | |
289 | checksum = pn533_std_checksum(value: stdf->datalen); |
290 | if (checksum != stdf->datalen_checksum) |
291 | return false; |
292 | |
293 | checksum = pn533_std_data_checksum(data: stdf->data, datalen: stdf->datalen); |
294 | if (checksum != PN533_STD_FRAME_CHECKSUM(stdf)) |
295 | return false; |
296 | } else { |
297 | /* Extended */ |
298 | struct pn533_ext_frame *eif = _frame; |
299 | |
300 | dev->ops->rx_header_len = PN533_EXT_FRAME_HEADER_LEN; |
301 | |
302 | checksum = pn533_ext_checksum(be16_to_cpu(eif->datalen)); |
303 | if (checksum != eif->datalen_checksum) |
304 | return false; |
305 | |
306 | /* check data checksum */ |
307 | checksum = pn533_std_data_checksum(data: eif->data, |
308 | be16_to_cpu(eif->datalen)); |
309 | if (checksum != PN533_EXT_FRAME_CHECKSUM(eif)) |
310 | return false; |
311 | } |
312 | |
313 | return true; |
314 | } |
315 | |
316 | bool pn533_rx_frame_is_ack(void *_frame) |
317 | { |
318 | struct pn533_std_frame *frame = _frame; |
319 | |
320 | if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF)) |
321 | return false; |
322 | |
323 | if (frame->datalen != 0 || frame->datalen_checksum != 0xFF) |
324 | return false; |
325 | |
326 | return true; |
327 | } |
328 | EXPORT_SYMBOL_GPL(pn533_rx_frame_is_ack); |
329 | |
330 | static inline int pn533_std_rx_frame_size(void *frame) |
331 | { |
332 | struct pn533_std_frame *f = frame; |
333 | |
334 | /* check for Extended Information frame */ |
335 | if (PN533_STD_IS_EXTENDED(f)) { |
336 | struct pn533_ext_frame *eif = frame; |
337 | |
338 | return sizeof(struct pn533_ext_frame) |
339 | + be16_to_cpu(eif->datalen) + PN533_STD_FRAME_TAIL_LEN; |
340 | } |
341 | |
342 | return sizeof(struct pn533_std_frame) + f->datalen + |
343 | PN533_STD_FRAME_TAIL_LEN; |
344 | } |
345 | |
346 | static u8 pn533_std_get_cmd_code(void *frame) |
347 | { |
348 | struct pn533_std_frame *f = frame; |
349 | struct pn533_ext_frame *eif = frame; |
350 | |
351 | if (PN533_STD_IS_EXTENDED(f)) |
352 | return PN533_FRAME_CMD(eif); |
353 | else |
354 | return PN533_FRAME_CMD(f); |
355 | } |
356 | |
357 | bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame) |
358 | { |
359 | return (dev->ops->get_cmd_code(frame) == |
360 | PN533_CMD_RESPONSE(dev->cmd->code)); |
361 | } |
362 | EXPORT_SYMBOL_GPL(pn533_rx_frame_is_cmd_response); |
363 | |
364 | |
365 | static struct pn533_frame_ops pn533_std_frame_ops = { |
366 | .tx_frame_init = pn533_std_tx_frame_init, |
367 | .tx_frame_finish = pn533_std_tx_frame_finish, |
368 | .tx_update_payload_len = pn533_std_tx_update_payload_len, |
369 | .tx_header_len = PN533_STD_FRAME_HEADER_LEN, |
370 | .tx_tail_len = PN533_STD_FRAME_TAIL_LEN, |
371 | |
372 | .rx_is_frame_valid = pn533_std_rx_frame_is_valid, |
373 | .rx_frame_size = pn533_std_rx_frame_size, |
374 | .rx_header_len = PN533_STD_FRAME_HEADER_LEN, |
375 | .rx_tail_len = PN533_STD_FRAME_TAIL_LEN, |
376 | |
377 | .max_payload_len = PN533_STD_FRAME_MAX_PAYLOAD_LEN, |
378 | .get_cmd_code = pn533_std_get_cmd_code, |
379 | }; |
380 | |
381 | static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code, |
382 | struct sk_buff *skb) |
383 | { |
384 | /* payload is already there, just update datalen */ |
385 | int payload_len = skb->len; |
386 | struct pn533_frame_ops *ops = dev->ops; |
387 | |
388 | |
389 | skb_push(skb, len: ops->tx_header_len); |
390 | skb_put(skb, len: ops->tx_tail_len); |
391 | |
392 | ops->tx_frame_init(skb->data, cmd_code); |
393 | ops->tx_update_payload_len(skb->data, payload_len); |
394 | ops->tx_frame_finish(skb->data); |
395 | } |
396 | |
397 | static int pn533_send_async_complete(struct pn533 *dev) |
398 | { |
399 | struct pn533_cmd *cmd = dev->cmd; |
400 | struct sk_buff *resp; |
401 | int status, rc = 0; |
402 | |
403 | if (!cmd) { |
404 | dev_dbg(dev->dev, "%s: cmd not set\n" , __func__); |
405 | goto done; |
406 | } |
407 | |
408 | dev_kfree_skb(cmd->req); |
409 | |
410 | status = cmd->status; |
411 | resp = cmd->resp; |
412 | |
413 | if (status < 0) { |
414 | rc = cmd->complete_cb(dev, cmd->complete_cb_context, |
415 | ERR_PTR(error: status)); |
416 | dev_kfree_skb(resp); |
417 | goto done; |
418 | } |
419 | |
420 | /* when no response is set we got interrupted */ |
421 | if (!resp) |
422 | resp = ERR_PTR(error: -EINTR); |
423 | |
424 | if (!IS_ERR(ptr: resp)) { |
425 | skb_pull(skb: resp, len: dev->ops->rx_header_len); |
426 | skb_trim(skb: resp, len: resp->len - dev->ops->rx_tail_len); |
427 | } |
428 | |
429 | rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp); |
430 | |
431 | done: |
432 | kfree(objp: cmd); |
433 | dev->cmd = NULL; |
434 | return rc; |
435 | } |
436 | |
437 | static int __pn533_send_async(struct pn533 *dev, u8 cmd_code, |
438 | struct sk_buff *req, |
439 | pn533_send_async_complete_t complete_cb, |
440 | void *complete_cb_context) |
441 | { |
442 | struct pn533_cmd *cmd; |
443 | int rc = 0; |
444 | |
445 | dev_dbg(dev->dev, "Sending command 0x%x\n" , cmd_code); |
446 | |
447 | cmd = kzalloc(size: sizeof(*cmd), GFP_KERNEL); |
448 | if (!cmd) |
449 | return -ENOMEM; |
450 | |
451 | cmd->code = cmd_code; |
452 | cmd->req = req; |
453 | cmd->complete_cb = complete_cb; |
454 | cmd->complete_cb_context = complete_cb_context; |
455 | |
456 | pn533_build_cmd_frame(dev, cmd_code, skb: req); |
457 | |
458 | mutex_lock(&dev->cmd_lock); |
459 | |
460 | if (!dev->cmd_pending) { |
461 | dev->cmd = cmd; |
462 | rc = dev->phy_ops->send_frame(dev, req); |
463 | if (rc) { |
464 | dev->cmd = NULL; |
465 | goto error; |
466 | } |
467 | |
468 | dev->cmd_pending = 1; |
469 | goto unlock; |
470 | } |
471 | |
472 | dev_dbg(dev->dev, "%s Queueing command 0x%x\n" , |
473 | __func__, cmd_code); |
474 | |
475 | INIT_LIST_HEAD(list: &cmd->queue); |
476 | list_add_tail(new: &cmd->queue, head: &dev->cmd_queue); |
477 | |
478 | goto unlock; |
479 | |
480 | error: |
481 | kfree(objp: cmd); |
482 | unlock: |
483 | mutex_unlock(lock: &dev->cmd_lock); |
484 | return rc; |
485 | } |
486 | |
487 | static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code, |
488 | struct sk_buff *req, |
489 | pn533_send_async_complete_t complete_cb, |
490 | void *complete_cb_context) |
491 | { |
492 | return __pn533_send_async(dev, cmd_code, req, complete_cb, |
493 | complete_cb_context); |
494 | } |
495 | |
496 | static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code, |
497 | struct sk_buff *req, |
498 | pn533_send_async_complete_t complete_cb, |
499 | void *complete_cb_context) |
500 | { |
501 | return __pn533_send_async(dev, cmd_code, req, complete_cb, |
502 | complete_cb_context); |
503 | } |
504 | |
505 | /* |
506 | * pn533_send_cmd_direct_async |
507 | * |
508 | * The function sends a priority cmd directly to the chip omitting the cmd |
509 | * queue. It's intended to be used by chaining mechanism of received responses |
510 | * where the host has to request every single chunk of data before scheduling |
511 | * next cmd from the queue. |
512 | */ |
513 | static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code, |
514 | struct sk_buff *req, |
515 | pn533_send_async_complete_t complete_cb, |
516 | void *complete_cb_context) |
517 | { |
518 | struct pn533_cmd *cmd; |
519 | int rc; |
520 | |
521 | cmd = kzalloc(size: sizeof(*cmd), GFP_KERNEL); |
522 | if (!cmd) |
523 | return -ENOMEM; |
524 | |
525 | cmd->code = cmd_code; |
526 | cmd->req = req; |
527 | cmd->complete_cb = complete_cb; |
528 | cmd->complete_cb_context = complete_cb_context; |
529 | |
530 | pn533_build_cmd_frame(dev, cmd_code, skb: req); |
531 | |
532 | dev->cmd = cmd; |
533 | rc = dev->phy_ops->send_frame(dev, req); |
534 | if (rc < 0) { |
535 | dev->cmd = NULL; |
536 | kfree(objp: cmd); |
537 | } |
538 | |
539 | return rc; |
540 | } |
541 | |
542 | static void pn533_wq_cmd_complete(struct work_struct *work) |
543 | { |
544 | struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work); |
545 | int rc; |
546 | |
547 | rc = pn533_send_async_complete(dev); |
548 | if (rc != -EINPROGRESS) |
549 | queue_work(wq: dev->wq, work: &dev->cmd_work); |
550 | } |
551 | |
552 | static void pn533_wq_cmd(struct work_struct *work) |
553 | { |
554 | struct pn533 *dev = container_of(work, struct pn533, cmd_work); |
555 | struct pn533_cmd *cmd; |
556 | int rc; |
557 | |
558 | mutex_lock(&dev->cmd_lock); |
559 | |
560 | if (list_empty(head: &dev->cmd_queue)) { |
561 | dev->cmd_pending = 0; |
562 | mutex_unlock(lock: &dev->cmd_lock); |
563 | return; |
564 | } |
565 | |
566 | cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue); |
567 | |
568 | list_del(entry: &cmd->queue); |
569 | |
570 | mutex_unlock(lock: &dev->cmd_lock); |
571 | |
572 | dev->cmd = cmd; |
573 | rc = dev->phy_ops->send_frame(dev, cmd->req); |
574 | if (rc < 0) { |
575 | dev->cmd = NULL; |
576 | dev_kfree_skb(cmd->req); |
577 | kfree(objp: cmd); |
578 | return; |
579 | } |
580 | |
581 | } |
582 | |
583 | struct pn533_sync_cmd_response { |
584 | struct sk_buff *resp; |
585 | struct completion done; |
586 | }; |
587 | |
588 | static int pn533_send_sync_complete(struct pn533 *dev, void *_arg, |
589 | struct sk_buff *resp) |
590 | { |
591 | struct pn533_sync_cmd_response *arg = _arg; |
592 | |
593 | arg->resp = resp; |
594 | complete(&arg->done); |
595 | |
596 | return 0; |
597 | } |
598 | |
599 | /* pn533_send_cmd_sync |
600 | * |
601 | * Please note the req parameter is freed inside the function to |
602 | * limit a number of return value interpretations by the caller. |
603 | * |
604 | * 1. negative in case of error during TX path -> req should be freed |
605 | * |
606 | * 2. negative in case of error during RX path -> req should not be freed |
607 | * as it's been already freed at the beginning of RX path by |
608 | * async_complete_cb. |
609 | * |
610 | * 3. valid pointer in case of successful RX path |
611 | * |
612 | * A caller has to check a return value with IS_ERR macro. If the test pass, |
613 | * the returned pointer is valid. |
614 | * |
615 | */ |
616 | static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code, |
617 | struct sk_buff *req) |
618 | { |
619 | int rc; |
620 | struct pn533_sync_cmd_response arg; |
621 | |
622 | init_completion(x: &arg.done); |
623 | |
624 | rc = pn533_send_cmd_async(dev, cmd_code, req, |
625 | complete_cb: pn533_send_sync_complete, complete_cb_context: &arg); |
626 | if (rc) { |
627 | dev_kfree_skb(req); |
628 | return ERR_PTR(error: rc); |
629 | } |
630 | |
631 | wait_for_completion(&arg.done); |
632 | |
633 | return arg.resp; |
634 | } |
635 | |
636 | static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size) |
637 | { |
638 | struct sk_buff *skb; |
639 | |
640 | skb = alloc_skb(size: dev->ops->tx_header_len + |
641 | size + |
642 | dev->ops->tx_tail_len, GFP_KERNEL); |
643 | |
644 | if (skb) |
645 | skb_reserve(skb, len: dev->ops->tx_header_len); |
646 | |
647 | return skb; |
648 | } |
649 | |
650 | struct pn533_target_type_a { |
651 | __be16 sens_res; |
652 | u8 sel_res; |
653 | u8 nfcid_len; |
654 | u8 nfcid_data[]; |
655 | } __packed; |
656 | |
657 | |
658 | #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6)) |
659 | #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0)) |
660 | #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8)) |
661 | |
662 | #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00 |
663 | #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C |
664 | |
665 | #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5) |
666 | #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2) |
667 | |
668 | #define PN533_TYPE_A_SEL_PROT_MIFARE 0 |
669 | #define PN533_TYPE_A_SEL_PROT_ISO14443 1 |
670 | #define PN533_TYPE_A_SEL_PROT_DEP 2 |
671 | #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3 |
672 | |
673 | static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a, |
674 | int target_data_len) |
675 | { |
676 | u8 ssd; |
677 | u8 platconf; |
678 | |
679 | if (target_data_len < sizeof(struct pn533_target_type_a)) |
680 | return false; |
681 | |
682 | /* |
683 | * The length check of nfcid[] and ats[] are not being performed because |
684 | * the values are not being used |
685 | */ |
686 | |
687 | /* Requirement 4.6.3.3 from NFC Forum Digital Spec */ |
688 | ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res); |
689 | platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res); |
690 | |
691 | if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL && |
692 | platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) || |
693 | (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL && |
694 | platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL)) |
695 | return false; |
696 | |
697 | /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */ |
698 | if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0) |
699 | return false; |
700 | |
701 | if (type_a->nfcid_len > NFC_NFCID1_MAXSIZE) |
702 | return false; |
703 | |
704 | return true; |
705 | } |
706 | |
707 | static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data, |
708 | int tgt_data_len) |
709 | { |
710 | struct pn533_target_type_a *tgt_type_a; |
711 | |
712 | tgt_type_a = (struct pn533_target_type_a *)tgt_data; |
713 | |
714 | if (!pn533_target_type_a_is_valid(type_a: tgt_type_a, target_data_len: tgt_data_len)) |
715 | return -EPROTO; |
716 | |
717 | switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) { |
718 | case PN533_TYPE_A_SEL_PROT_MIFARE: |
719 | nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK; |
720 | break; |
721 | case PN533_TYPE_A_SEL_PROT_ISO14443: |
722 | nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK; |
723 | break; |
724 | case PN533_TYPE_A_SEL_PROT_DEP: |
725 | nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK; |
726 | break; |
727 | case PN533_TYPE_A_SEL_PROT_ISO14443_DEP: |
728 | nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK | |
729 | NFC_PROTO_NFC_DEP_MASK; |
730 | break; |
731 | } |
732 | |
733 | nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res); |
734 | nfc_tgt->sel_res = tgt_type_a->sel_res; |
735 | nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len; |
736 | memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len); |
737 | |
738 | return 0; |
739 | } |
740 | |
741 | struct pn533_target_felica { |
742 | u8 pol_res; |
743 | u8 opcode; |
744 | u8 nfcid2[NFC_NFCID2_MAXSIZE]; |
745 | u8 pad[8]; |
746 | /* optional */ |
747 | u8 syst_code[]; |
748 | } __packed; |
749 | |
750 | #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01 |
751 | #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE |
752 | |
753 | static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica, |
754 | int target_data_len) |
755 | { |
756 | if (target_data_len < sizeof(struct pn533_target_felica)) |
757 | return false; |
758 | |
759 | if (felica->opcode != PN533_FELICA_OPC_SENSF_RES) |
760 | return false; |
761 | |
762 | return true; |
763 | } |
764 | |
765 | static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data, |
766 | int tgt_data_len) |
767 | { |
768 | struct pn533_target_felica *tgt_felica; |
769 | |
770 | tgt_felica = (struct pn533_target_felica *)tgt_data; |
771 | |
772 | if (!pn533_target_felica_is_valid(felica: tgt_felica, target_data_len: tgt_data_len)) |
773 | return -EPROTO; |
774 | |
775 | if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) && |
776 | (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2)) |
777 | nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK; |
778 | else |
779 | nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK; |
780 | |
781 | memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9); |
782 | nfc_tgt->sensf_res_len = 9; |
783 | |
784 | memcpy(nfc_tgt->nfcid2, tgt_felica->nfcid2, NFC_NFCID2_MAXSIZE); |
785 | nfc_tgt->nfcid2_len = NFC_NFCID2_MAXSIZE; |
786 | |
787 | return 0; |
788 | } |
789 | |
790 | struct pn533_target_jewel { |
791 | __be16 sens_res; |
792 | u8 jewelid[4]; |
793 | } __packed; |
794 | |
795 | static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel, |
796 | int target_data_len) |
797 | { |
798 | u8 ssd; |
799 | u8 platconf; |
800 | |
801 | if (target_data_len < sizeof(struct pn533_target_jewel)) |
802 | return false; |
803 | |
804 | /* Requirement 4.6.3.3 from NFC Forum Digital Spec */ |
805 | ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res); |
806 | platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res); |
807 | |
808 | if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL && |
809 | platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) || |
810 | (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL && |
811 | platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL)) |
812 | return false; |
813 | |
814 | return true; |
815 | } |
816 | |
817 | static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data, |
818 | int tgt_data_len) |
819 | { |
820 | struct pn533_target_jewel *tgt_jewel; |
821 | |
822 | tgt_jewel = (struct pn533_target_jewel *)tgt_data; |
823 | |
824 | if (!pn533_target_jewel_is_valid(jewel: tgt_jewel, target_data_len: tgt_data_len)) |
825 | return -EPROTO; |
826 | |
827 | nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK; |
828 | nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res); |
829 | nfc_tgt->nfcid1_len = 4; |
830 | memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len); |
831 | |
832 | return 0; |
833 | } |
834 | |
835 | struct pn533_type_b_prot_info { |
836 | u8 bitrate; |
837 | u8 fsci_type; |
838 | u8 fwi_adc_fo; |
839 | } __packed; |
840 | |
841 | #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4) |
842 | #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0) |
843 | #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8 |
844 | |
845 | struct pn533_type_b_sens_res { |
846 | u8 opcode; |
847 | u8 nfcid[4]; |
848 | u8 appdata[4]; |
849 | struct pn533_type_b_prot_info prot_info; |
850 | } __packed; |
851 | |
852 | #define PN533_TYPE_B_OPC_SENSB_RES 0x50 |
853 | |
854 | struct pn533_target_type_b { |
855 | struct pn533_type_b_sens_res sensb_res; |
856 | u8 attrib_res_len; |
857 | u8 attrib_res[]; |
858 | } __packed; |
859 | |
860 | static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b, |
861 | int target_data_len) |
862 | { |
863 | if (target_data_len < sizeof(struct pn533_target_type_b)) |
864 | return false; |
865 | |
866 | if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES) |
867 | return false; |
868 | |
869 | if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) & |
870 | PN533_TYPE_B_PROT_TYPE_RFU_MASK) |
871 | return false; |
872 | |
873 | return true; |
874 | } |
875 | |
876 | static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data, |
877 | int tgt_data_len) |
878 | { |
879 | struct pn533_target_type_b *tgt_type_b; |
880 | |
881 | tgt_type_b = (struct pn533_target_type_b *)tgt_data; |
882 | |
883 | if (!pn533_target_type_b_is_valid(type_b: tgt_type_b, target_data_len: tgt_data_len)) |
884 | return -EPROTO; |
885 | |
886 | nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK; |
887 | |
888 | return 0; |
889 | } |
890 | |
891 | static void pn533_poll_reset_mod_list(struct pn533 *dev); |
892 | static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata, |
893 | int tgdata_len) |
894 | { |
895 | struct nfc_target nfc_tgt; |
896 | int rc; |
897 | |
898 | dev_dbg(dev->dev, "%s: modulation=%d\n" , |
899 | __func__, dev->poll_mod_curr); |
900 | |
901 | if (tg != 1) |
902 | return -EPROTO; |
903 | |
904 | memset(&nfc_tgt, 0, sizeof(struct nfc_target)); |
905 | |
906 | switch (dev->poll_mod_curr) { |
907 | case PN533_POLL_MOD_106KBPS_A: |
908 | rc = pn533_target_found_type_a(nfc_tgt: &nfc_tgt, tgt_data: tgdata, tgt_data_len: tgdata_len); |
909 | break; |
910 | case PN533_POLL_MOD_212KBPS_FELICA: |
911 | case PN533_POLL_MOD_424KBPS_FELICA: |
912 | rc = pn533_target_found_felica(nfc_tgt: &nfc_tgt, tgt_data: tgdata, tgt_data_len: tgdata_len); |
913 | break; |
914 | case PN533_POLL_MOD_106KBPS_JEWEL: |
915 | rc = pn533_target_found_jewel(nfc_tgt: &nfc_tgt, tgt_data: tgdata, tgt_data_len: tgdata_len); |
916 | break; |
917 | case PN533_POLL_MOD_847KBPS_B: |
918 | rc = pn533_target_found_type_b(nfc_tgt: &nfc_tgt, tgt_data: tgdata, tgt_data_len: tgdata_len); |
919 | break; |
920 | default: |
921 | nfc_err(dev->dev, |
922 | "Unknown current poll modulation\n" ); |
923 | return -EPROTO; |
924 | } |
925 | |
926 | if (rc) |
927 | return rc; |
928 | |
929 | if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) { |
930 | dev_dbg(dev->dev, |
931 | "The Tg found doesn't have the desired protocol\n" ); |
932 | return -EAGAIN; |
933 | } |
934 | |
935 | dev_dbg(dev->dev, |
936 | "Target found - supported protocols: 0x%x\n" , |
937 | nfc_tgt.supported_protocols); |
938 | |
939 | dev->tgt_available_prots = nfc_tgt.supported_protocols; |
940 | |
941 | pn533_poll_reset_mod_list(dev); |
942 | nfc_targets_found(dev: dev->nfc_dev, targets: &nfc_tgt, ntargets: 1); |
943 | |
944 | return 0; |
945 | } |
946 | |
947 | static inline void pn533_poll_next_mod(struct pn533 *dev) |
948 | { |
949 | dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count; |
950 | } |
951 | |
952 | static void pn533_poll_reset_mod_list(struct pn533 *dev) |
953 | { |
954 | dev->poll_mod_count = 0; |
955 | } |
956 | |
957 | static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index) |
958 | { |
959 | dev->poll_mod_active[dev->poll_mod_count] = |
960 | (struct pn533_poll_modulations *)&poll_mod[mod_index]; |
961 | dev->poll_mod_count++; |
962 | } |
963 | |
964 | static void pn533_poll_create_mod_list(struct pn533 *dev, |
965 | u32 im_protocols, u32 tm_protocols) |
966 | { |
967 | pn533_poll_reset_mod_list(dev); |
968 | |
969 | if ((im_protocols & NFC_PROTO_MIFARE_MASK) || |
970 | (im_protocols & NFC_PROTO_ISO14443_MASK) || |
971 | (im_protocols & NFC_PROTO_NFC_DEP_MASK)) |
972 | pn533_poll_add_mod(dev, mod_index: PN533_POLL_MOD_106KBPS_A); |
973 | |
974 | if (im_protocols & NFC_PROTO_FELICA_MASK || |
975 | im_protocols & NFC_PROTO_NFC_DEP_MASK) { |
976 | pn533_poll_add_mod(dev, mod_index: PN533_POLL_MOD_212KBPS_FELICA); |
977 | pn533_poll_add_mod(dev, mod_index: PN533_POLL_MOD_424KBPS_FELICA); |
978 | } |
979 | |
980 | if (im_protocols & NFC_PROTO_JEWEL_MASK) |
981 | pn533_poll_add_mod(dev, mod_index: PN533_POLL_MOD_106KBPS_JEWEL); |
982 | |
983 | if (im_protocols & NFC_PROTO_ISO14443_B_MASK) |
984 | pn533_poll_add_mod(dev, mod_index: PN533_POLL_MOD_847KBPS_B); |
985 | |
986 | if (tm_protocols) |
987 | pn533_poll_add_mod(dev, mod_index: PN533_LISTEN_MOD); |
988 | } |
989 | |
990 | static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp) |
991 | { |
992 | u8 nbtg, tg, *tgdata; |
993 | int rc, tgdata_len; |
994 | |
995 | /* Toggle the DEP polling */ |
996 | if (dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK) |
997 | dev->poll_dep = 1; |
998 | |
999 | nbtg = resp->data[0]; |
1000 | tg = resp->data[1]; |
1001 | tgdata = &resp->data[2]; |
1002 | tgdata_len = resp->len - 2; /* nbtg + tg */ |
1003 | |
1004 | if (nbtg) { |
1005 | rc = pn533_target_found(dev, tg, tgdata, tgdata_len); |
1006 | |
1007 | /* We must stop the poll after a valid target found */ |
1008 | if (rc == 0) |
1009 | return 0; |
1010 | } |
1011 | |
1012 | return -EAGAIN; |
1013 | } |
1014 | |
1015 | static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev) |
1016 | { |
1017 | struct sk_buff *skb; |
1018 | u8 *felica, *nfcid3; |
1019 | |
1020 | u8 *gbytes = dev->gb; |
1021 | size_t gbytes_len = dev->gb_len; |
1022 | |
1023 | u8 felica_params[18] = {0x1, 0xfe, /* DEP */ |
1024 | 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */ |
1025 | 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, |
1026 | 0xff, 0xff}; /* System code */ |
1027 | |
1028 | u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */ |
1029 | 0x0, 0x0, 0x0, |
1030 | 0x40}; /* SEL_RES for DEP */ |
1031 | |
1032 | unsigned int skb_len = 36 + /* |
1033 | * mode (1), mifare (6), |
1034 | * felica (18), nfcid3 (10), gb_len (1) |
1035 | */ |
1036 | gbytes_len + |
1037 | 1; /* len Tk*/ |
1038 | |
1039 | skb = pn533_alloc_skb(dev, size: skb_len); |
1040 | if (!skb) |
1041 | return NULL; |
1042 | |
1043 | /* DEP support only */ |
1044 | skb_put_u8(skb, PN533_INIT_TARGET_DEP); |
1045 | |
1046 | /* MIFARE params */ |
1047 | skb_put_data(skb, data: mifare_params, len: 6); |
1048 | |
1049 | /* Felica params */ |
1050 | felica = skb_put_data(skb, data: felica_params, len: 18); |
1051 | get_random_bytes(buf: felica + 2, len: 6); |
1052 | |
1053 | /* NFCID3 */ |
1054 | nfcid3 = skb_put_zero(skb, len: 10); |
1055 | memcpy(nfcid3, felica, 8); |
1056 | |
1057 | /* General bytes */ |
1058 | skb_put_u8(skb, val: gbytes_len); |
1059 | |
1060 | skb_put_data(skb, data: gbytes, len: gbytes_len); |
1061 | |
1062 | /* Len Tk */ |
1063 | skb_put_u8(skb, val: 0); |
1064 | |
1065 | return skb; |
1066 | } |
1067 | |
1068 | static void pn533_wq_tm_mi_recv(struct work_struct *work); |
1069 | static struct sk_buff *pn533_build_response(struct pn533 *dev); |
1070 | |
1071 | static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg, |
1072 | struct sk_buff *resp) |
1073 | { |
1074 | struct sk_buff *skb; |
1075 | u8 status, ret, mi; |
1076 | int rc; |
1077 | |
1078 | if (IS_ERR(ptr: resp)) { |
1079 | skb_queue_purge(list: &dev->resp_q); |
1080 | return PTR_ERR(ptr: resp); |
1081 | } |
1082 | |
1083 | status = resp->data[0]; |
1084 | |
1085 | ret = status & PN533_CMD_RET_MASK; |
1086 | mi = status & PN533_CMD_MI_MASK; |
1087 | |
1088 | skb_pull(skb: resp, len: sizeof(status)); |
1089 | |
1090 | if (ret != PN533_CMD_RET_SUCCESS) { |
1091 | rc = -EIO; |
1092 | goto error; |
1093 | } |
1094 | |
1095 | skb_queue_tail(list: &dev->resp_q, newsk: resp); |
1096 | |
1097 | if (mi) { |
1098 | queue_work(wq: dev->wq, work: &dev->mi_tm_rx_work); |
1099 | return -EINPROGRESS; |
1100 | } |
1101 | |
1102 | skb = pn533_build_response(dev); |
1103 | if (!skb) { |
1104 | rc = -EIO; |
1105 | goto error; |
1106 | } |
1107 | |
1108 | return nfc_tm_data_received(dev: dev->nfc_dev, skb); |
1109 | |
1110 | error: |
1111 | nfc_tm_deactivated(dev: dev->nfc_dev); |
1112 | dev->tgt_mode = 0; |
1113 | skb_queue_purge(list: &dev->resp_q); |
1114 | dev_kfree_skb(resp); |
1115 | |
1116 | return rc; |
1117 | } |
1118 | |
1119 | static void pn533_wq_tm_mi_recv(struct work_struct *work) |
1120 | { |
1121 | struct pn533 *dev = container_of(work, struct pn533, mi_tm_rx_work); |
1122 | struct sk_buff *skb; |
1123 | int rc; |
1124 | |
1125 | skb = pn533_alloc_skb(dev, size: 0); |
1126 | if (!skb) |
1127 | return; |
1128 | |
1129 | rc = pn533_send_cmd_direct_async(dev, |
1130 | PN533_CMD_TG_GET_DATA, |
1131 | req: skb, |
1132 | complete_cb: pn533_tm_get_data_complete, |
1133 | NULL); |
1134 | |
1135 | if (rc < 0) |
1136 | dev_kfree_skb(skb); |
1137 | } |
1138 | |
1139 | static int pn533_tm_send_complete(struct pn533 *dev, void *arg, |
1140 | struct sk_buff *resp); |
1141 | static void pn533_wq_tm_mi_send(struct work_struct *work) |
1142 | { |
1143 | struct pn533 *dev = container_of(work, struct pn533, mi_tm_tx_work); |
1144 | struct sk_buff *skb; |
1145 | int rc; |
1146 | |
1147 | /* Grab the first skb in the queue */ |
1148 | skb = skb_dequeue(list: &dev->fragment_skb); |
1149 | if (skb == NULL) { /* No more data */ |
1150 | /* Reset the queue for future use */ |
1151 | skb_queue_head_init(list: &dev->fragment_skb); |
1152 | goto error; |
1153 | } |
1154 | |
1155 | /* last entry - remove MI bit */ |
1156 | if (skb_queue_len(list_: &dev->fragment_skb) == 0) { |
1157 | rc = pn533_send_cmd_direct_async(dev, PN533_CMD_TG_SET_DATA, |
1158 | req: skb, complete_cb: pn533_tm_send_complete, NULL); |
1159 | } else |
1160 | rc = pn533_send_cmd_direct_async(dev, |
1161 | PN533_CMD_TG_SET_META_DATA, |
1162 | req: skb, complete_cb: pn533_tm_send_complete, NULL); |
1163 | |
1164 | if (rc == 0) /* success */ |
1165 | return; |
1166 | |
1167 | dev_err(dev->dev, |
1168 | "Error %d when trying to perform set meta data_exchange" , rc); |
1169 | |
1170 | dev_kfree_skb(skb); |
1171 | |
1172 | error: |
1173 | dev->phy_ops->send_ack(dev, GFP_KERNEL); |
1174 | queue_work(wq: dev->wq, work: &dev->cmd_work); |
1175 | } |
1176 | |
1177 | static void pn533_wq_tg_get_data(struct work_struct *work) |
1178 | { |
1179 | struct pn533 *dev = container_of(work, struct pn533, tg_work); |
1180 | struct sk_buff *skb; |
1181 | int rc; |
1182 | |
1183 | skb = pn533_alloc_skb(dev, size: 0); |
1184 | if (!skb) |
1185 | return; |
1186 | |
1187 | rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, req: skb, |
1188 | complete_cb: pn533_tm_get_data_complete, NULL); |
1189 | |
1190 | if (rc < 0) |
1191 | dev_kfree_skb(skb); |
1192 | } |
1193 | |
1194 | #define ATR_REQ_GB_OFFSET 17 |
1195 | static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp) |
1196 | { |
1197 | u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb; |
1198 | size_t gb_len; |
1199 | int rc; |
1200 | |
1201 | if (resp->len < ATR_REQ_GB_OFFSET + 1) |
1202 | return -EINVAL; |
1203 | |
1204 | mode = resp->data[0]; |
1205 | cmd = &resp->data[1]; |
1206 | |
1207 | dev_dbg(dev->dev, "Target mode 0x%x len %d\n" , |
1208 | mode, resp->len); |
1209 | |
1210 | if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) == |
1211 | PN533_INIT_TARGET_RESP_ACTIVE) |
1212 | comm_mode = NFC_COMM_ACTIVE; |
1213 | |
1214 | if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */ |
1215 | return -EOPNOTSUPP; |
1216 | |
1217 | gb = cmd + ATR_REQ_GB_OFFSET; |
1218 | gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1); |
1219 | |
1220 | rc = nfc_tm_activated(dev: dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK, |
1221 | comm_mode, gb, gb_len); |
1222 | if (rc < 0) { |
1223 | nfc_err(dev->dev, |
1224 | "Error when signaling target activation\n" ); |
1225 | return rc; |
1226 | } |
1227 | |
1228 | dev->tgt_mode = 1; |
1229 | queue_work(wq: dev->wq, work: &dev->tg_work); |
1230 | |
1231 | return 0; |
1232 | } |
1233 | |
1234 | static void pn533_listen_mode_timer(struct timer_list *t) |
1235 | { |
1236 | struct pn533 *dev = from_timer(dev, t, listen_timer); |
1237 | |
1238 | dev->cancel_listen = 1; |
1239 | |
1240 | pn533_poll_next_mod(dev); |
1241 | |
1242 | queue_delayed_work(wq: dev->wq, dwork: &dev->poll_work, |
1243 | delay: msecs_to_jiffies(PN533_POLL_INTERVAL)); |
1244 | } |
1245 | |
1246 | static int pn533_rf_complete(struct pn533 *dev, void *arg, |
1247 | struct sk_buff *resp) |
1248 | { |
1249 | int rc = 0; |
1250 | |
1251 | if (IS_ERR(ptr: resp)) { |
1252 | rc = PTR_ERR(ptr: resp); |
1253 | |
1254 | nfc_err(dev->dev, "RF setting error %d\n" , rc); |
1255 | |
1256 | return rc; |
1257 | } |
1258 | |
1259 | queue_delayed_work(wq: dev->wq, dwork: &dev->poll_work, |
1260 | delay: msecs_to_jiffies(PN533_POLL_INTERVAL)); |
1261 | |
1262 | dev_kfree_skb(resp); |
1263 | return rc; |
1264 | } |
1265 | |
1266 | static void pn533_wq_rf(struct work_struct *work) |
1267 | { |
1268 | struct pn533 *dev = container_of(work, struct pn533, rf_work); |
1269 | struct sk_buff *skb; |
1270 | int rc; |
1271 | |
1272 | skb = pn533_alloc_skb(dev, size: 2); |
1273 | if (!skb) |
1274 | return; |
1275 | |
1276 | skb_put_u8(skb, PN533_CFGITEM_RF_FIELD); |
1277 | skb_put_u8(skb, PN533_CFGITEM_RF_FIELD_AUTO_RFCA); |
1278 | |
1279 | rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, req: skb, |
1280 | complete_cb: pn533_rf_complete, NULL); |
1281 | if (rc < 0) { |
1282 | dev_kfree_skb(skb); |
1283 | nfc_err(dev->dev, "RF setting error %d\n" , rc); |
1284 | } |
1285 | } |
1286 | |
1287 | static int pn533_poll_dep_complete(struct pn533 *dev, void *arg, |
1288 | struct sk_buff *resp) |
1289 | { |
1290 | struct pn533_cmd_jump_dep_response *rsp; |
1291 | struct nfc_target nfc_target; |
1292 | u8 target_gt_len; |
1293 | int rc; |
1294 | |
1295 | if (IS_ERR(ptr: resp)) |
1296 | return PTR_ERR(ptr: resp); |
1297 | |
1298 | memset(&nfc_target, 0, sizeof(struct nfc_target)); |
1299 | |
1300 | rsp = (struct pn533_cmd_jump_dep_response *)resp->data; |
1301 | |
1302 | rc = rsp->status & PN533_CMD_RET_MASK; |
1303 | if (rc != PN533_CMD_RET_SUCCESS) { |
1304 | /* Not target found, turn radio off */ |
1305 | queue_work(wq: dev->wq, work: &dev->rf_work); |
1306 | |
1307 | dev_kfree_skb(resp); |
1308 | return 0; |
1309 | } |
1310 | |
1311 | dev_dbg(dev->dev, "Creating new target" ); |
1312 | |
1313 | nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK; |
1314 | nfc_target.nfcid1_len = 10; |
1315 | memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len); |
1316 | rc = nfc_targets_found(dev: dev->nfc_dev, targets: &nfc_target, ntargets: 1); |
1317 | if (rc) |
1318 | goto error; |
1319 | |
1320 | dev->tgt_available_prots = 0; |
1321 | dev->tgt_active_prot = NFC_PROTO_NFC_DEP; |
1322 | |
1323 | /* ATR_RES general bytes are located at offset 17 */ |
1324 | target_gt_len = resp->len - 17; |
1325 | rc = nfc_set_remote_general_bytes(dev: dev->nfc_dev, |
1326 | gt: rsp->gt, gt_len: target_gt_len); |
1327 | if (!rc) { |
1328 | rc = nfc_dep_link_is_up(dev: dev->nfc_dev, |
1329 | target_idx: dev->nfc_dev->targets[0].idx, |
1330 | comm_mode: 0, NFC_RF_INITIATOR); |
1331 | |
1332 | if (!rc) |
1333 | pn533_poll_reset_mod_list(dev); |
1334 | } |
1335 | error: |
1336 | dev_kfree_skb(resp); |
1337 | return rc; |
1338 | } |
1339 | |
1340 | #define PASSIVE_DATA_LEN 5 |
1341 | static int pn533_poll_dep(struct nfc_dev *nfc_dev) |
1342 | { |
1343 | struct pn533 *dev = nfc_get_drvdata(dev: nfc_dev); |
1344 | struct sk_buff *skb; |
1345 | int rc, skb_len; |
1346 | u8 *next, nfcid3[NFC_NFCID3_MAXSIZE]; |
1347 | u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3}; |
1348 | |
1349 | if (!dev->gb) { |
1350 | dev->gb = nfc_get_local_general_bytes(dev: nfc_dev, gb_len: &dev->gb_len); |
1351 | |
1352 | if (!dev->gb || !dev->gb_len) { |
1353 | dev->poll_dep = 0; |
1354 | queue_work(wq: dev->wq, work: &dev->rf_work); |
1355 | } |
1356 | } |
1357 | |
1358 | skb_len = 3 + dev->gb_len; /* ActPass + BR + Next */ |
1359 | skb_len += PASSIVE_DATA_LEN; |
1360 | |
1361 | /* NFCID3 */ |
1362 | skb_len += NFC_NFCID3_MAXSIZE; |
1363 | nfcid3[0] = 0x1; |
1364 | nfcid3[1] = 0xfe; |
1365 | get_random_bytes(buf: nfcid3 + 2, len: 6); |
1366 | |
1367 | skb = pn533_alloc_skb(dev, size: skb_len); |
1368 | if (!skb) |
1369 | return -ENOMEM; |
1370 | |
1371 | skb_put_u8(skb, val: 0x01); /* Active */ |
1372 | skb_put_u8(skb, val: 0x02); /* 424 kbps */ |
1373 | |
1374 | next = skb_put(skb, len: 1); /* Next */ |
1375 | *next = 0; |
1376 | |
1377 | /* Copy passive data */ |
1378 | skb_put_data(skb, data: passive_data, PASSIVE_DATA_LEN); |
1379 | *next |= 1; |
1380 | |
1381 | /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */ |
1382 | skb_put_data(skb, data: nfcid3, NFC_NFCID3_MAXSIZE); |
1383 | *next |= 2; |
1384 | |
1385 | skb_put_data(skb, data: dev->gb, len: dev->gb_len); |
1386 | *next |= 4; /* We have some Gi */ |
1387 | |
1388 | rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, req: skb, |
1389 | complete_cb: pn533_poll_dep_complete, NULL); |
1390 | |
1391 | if (rc < 0) |
1392 | dev_kfree_skb(skb); |
1393 | |
1394 | return rc; |
1395 | } |
1396 | |
1397 | static int pn533_autopoll_complete(struct pn533 *dev, void *arg, |
1398 | struct sk_buff *resp) |
1399 | { |
1400 | struct pn532_autopoll_resp *apr; |
1401 | struct nfc_target nfc_tgt; |
1402 | u8 nbtg; |
1403 | int rc; |
1404 | |
1405 | if (IS_ERR(ptr: resp)) { |
1406 | rc = PTR_ERR(ptr: resp); |
1407 | |
1408 | nfc_err(dev->dev, "%s autopoll complete error %d\n" , |
1409 | __func__, rc); |
1410 | |
1411 | if (rc == -ENOENT) { |
1412 | if (dev->poll_mod_count != 0) |
1413 | return rc; |
1414 | goto stop_poll; |
1415 | } else if (rc < 0) { |
1416 | nfc_err(dev->dev, |
1417 | "Error %d when running autopoll\n" , rc); |
1418 | goto stop_poll; |
1419 | } |
1420 | } |
1421 | |
1422 | nbtg = resp->data[0]; |
1423 | if ((nbtg > 2) || (nbtg <= 0)) |
1424 | return -EAGAIN; |
1425 | |
1426 | apr = (struct pn532_autopoll_resp *)&resp->data[1]; |
1427 | while (nbtg--) { |
1428 | memset(&nfc_tgt, 0, sizeof(struct nfc_target)); |
1429 | switch (apr->type) { |
1430 | case PN532_AUTOPOLL_TYPE_ISOA: |
1431 | dev_dbg(dev->dev, "ISOA\n" ); |
1432 | rc = pn533_target_found_type_a(nfc_tgt: &nfc_tgt, tgt_data: apr->tgdata, |
1433 | tgt_data_len: apr->ln - 1); |
1434 | break; |
1435 | case PN532_AUTOPOLL_TYPE_FELICA212: |
1436 | case PN532_AUTOPOLL_TYPE_FELICA424: |
1437 | dev_dbg(dev->dev, "FELICA\n" ); |
1438 | rc = pn533_target_found_felica(nfc_tgt: &nfc_tgt, tgt_data: apr->tgdata, |
1439 | tgt_data_len: apr->ln - 1); |
1440 | break; |
1441 | case PN532_AUTOPOLL_TYPE_JEWEL: |
1442 | dev_dbg(dev->dev, "JEWEL\n" ); |
1443 | rc = pn533_target_found_jewel(nfc_tgt: &nfc_tgt, tgt_data: apr->tgdata, |
1444 | tgt_data_len: apr->ln - 1); |
1445 | break; |
1446 | case PN532_AUTOPOLL_TYPE_ISOB: |
1447 | dev_dbg(dev->dev, "ISOB\n" ); |
1448 | rc = pn533_target_found_type_b(nfc_tgt: &nfc_tgt, tgt_data: apr->tgdata, |
1449 | tgt_data_len: apr->ln - 1); |
1450 | break; |
1451 | case PN532_AUTOPOLL_TYPE_MIFARE: |
1452 | dev_dbg(dev->dev, "Mifare\n" ); |
1453 | rc = pn533_target_found_type_a(nfc_tgt: &nfc_tgt, tgt_data: apr->tgdata, |
1454 | tgt_data_len: apr->ln - 1); |
1455 | break; |
1456 | default: |
1457 | nfc_err(dev->dev, |
1458 | "Unknown current poll modulation\n" ); |
1459 | rc = -EPROTO; |
1460 | } |
1461 | |
1462 | if (rc) |
1463 | goto done; |
1464 | |
1465 | if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) { |
1466 | nfc_err(dev->dev, |
1467 | "The Tg found doesn't have the desired protocol\n" ); |
1468 | rc = -EAGAIN; |
1469 | goto done; |
1470 | } |
1471 | |
1472 | dev->tgt_available_prots = nfc_tgt.supported_protocols; |
1473 | apr = (struct pn532_autopoll_resp *) |
1474 | (apr->tgdata + (apr->ln - 1)); |
1475 | } |
1476 | |
1477 | pn533_poll_reset_mod_list(dev); |
1478 | nfc_targets_found(dev: dev->nfc_dev, targets: &nfc_tgt, ntargets: 1); |
1479 | |
1480 | done: |
1481 | dev_kfree_skb(resp); |
1482 | return rc; |
1483 | |
1484 | stop_poll: |
1485 | nfc_err(dev->dev, "autopoll operation has been stopped\n" ); |
1486 | |
1487 | pn533_poll_reset_mod_list(dev); |
1488 | dev->poll_protocols = 0; |
1489 | return rc; |
1490 | } |
1491 | |
1492 | static int pn533_poll_complete(struct pn533 *dev, void *arg, |
1493 | struct sk_buff *resp) |
1494 | { |
1495 | struct pn533_poll_modulations *cur_mod; |
1496 | int rc; |
1497 | |
1498 | if (IS_ERR(ptr: resp)) { |
1499 | rc = PTR_ERR(ptr: resp); |
1500 | |
1501 | nfc_err(dev->dev, "%s Poll complete error %d\n" , |
1502 | __func__, rc); |
1503 | |
1504 | if (rc == -ENOENT) { |
1505 | if (dev->poll_mod_count != 0) |
1506 | return rc; |
1507 | goto stop_poll; |
1508 | } else if (rc < 0) { |
1509 | nfc_err(dev->dev, |
1510 | "Error %d when running poll\n" , rc); |
1511 | goto stop_poll; |
1512 | } |
1513 | } |
1514 | |
1515 | cur_mod = dev->poll_mod_active[dev->poll_mod_curr]; |
1516 | |
1517 | if (cur_mod->len == 0) { /* Target mode */ |
1518 | del_timer(timer: &dev->listen_timer); |
1519 | rc = pn533_init_target_complete(dev, resp); |
1520 | goto done; |
1521 | } |
1522 | |
1523 | /* Initiator mode */ |
1524 | rc = pn533_start_poll_complete(dev, resp); |
1525 | if (!rc) |
1526 | goto done; |
1527 | |
1528 | if (!dev->poll_mod_count) { |
1529 | dev_dbg(dev->dev, "Polling has been stopped\n" ); |
1530 | goto done; |
1531 | } |
1532 | |
1533 | pn533_poll_next_mod(dev); |
1534 | /* Not target found, turn radio off */ |
1535 | queue_work(wq: dev->wq, work: &dev->rf_work); |
1536 | |
1537 | done: |
1538 | dev_kfree_skb(resp); |
1539 | return rc; |
1540 | |
1541 | stop_poll: |
1542 | nfc_err(dev->dev, "Polling operation has been stopped\n" ); |
1543 | |
1544 | pn533_poll_reset_mod_list(dev); |
1545 | dev->poll_protocols = 0; |
1546 | return rc; |
1547 | } |
1548 | |
1549 | static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev, |
1550 | struct pn533_poll_modulations *mod) |
1551 | { |
1552 | struct sk_buff *skb; |
1553 | |
1554 | skb = pn533_alloc_skb(dev, size: mod->len); |
1555 | if (!skb) |
1556 | return NULL; |
1557 | |
1558 | skb_put_data(skb, data: &mod->data, len: mod->len); |
1559 | |
1560 | return skb; |
1561 | } |
1562 | |
1563 | static int pn533_send_poll_frame(struct pn533 *dev) |
1564 | { |
1565 | struct pn533_poll_modulations *mod; |
1566 | struct sk_buff *skb; |
1567 | int rc; |
1568 | u8 cmd_code; |
1569 | |
1570 | mod = dev->poll_mod_active[dev->poll_mod_curr]; |
1571 | |
1572 | dev_dbg(dev->dev, "%s mod len %d\n" , |
1573 | __func__, mod->len); |
1574 | |
1575 | if ((dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK) && dev->poll_dep) { |
1576 | dev->poll_dep = 0; |
1577 | return pn533_poll_dep(nfc_dev: dev->nfc_dev); |
1578 | } |
1579 | |
1580 | if (mod->len == 0) { /* Listen mode */ |
1581 | cmd_code = PN533_CMD_TG_INIT_AS_TARGET; |
1582 | skb = pn533_alloc_poll_tg_frame(dev); |
1583 | } else { /* Polling mode */ |
1584 | cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET; |
1585 | skb = pn533_alloc_poll_in_frame(dev, mod); |
1586 | } |
1587 | |
1588 | if (!skb) { |
1589 | nfc_err(dev->dev, "Failed to allocate skb\n" ); |
1590 | return -ENOMEM; |
1591 | } |
1592 | |
1593 | rc = pn533_send_cmd_async(dev, cmd_code, req: skb, complete_cb: pn533_poll_complete, |
1594 | NULL); |
1595 | if (rc < 0) { |
1596 | dev_kfree_skb(skb); |
1597 | nfc_err(dev->dev, "Polling loop error %d\n" , rc); |
1598 | } |
1599 | |
1600 | return rc; |
1601 | } |
1602 | |
1603 | static void pn533_wq_poll(struct work_struct *work) |
1604 | { |
1605 | struct pn533 *dev = container_of(work, struct pn533, poll_work.work); |
1606 | struct pn533_poll_modulations *cur_mod; |
1607 | int rc; |
1608 | |
1609 | cur_mod = dev->poll_mod_active[dev->poll_mod_curr]; |
1610 | |
1611 | dev_dbg(dev->dev, |
1612 | "%s cancel_listen %d modulation len %d\n" , |
1613 | __func__, dev->cancel_listen, cur_mod->len); |
1614 | |
1615 | if (dev->cancel_listen == 1) { |
1616 | dev->cancel_listen = 0; |
1617 | dev->phy_ops->abort_cmd(dev, GFP_ATOMIC); |
1618 | } |
1619 | |
1620 | rc = pn533_send_poll_frame(dev); |
1621 | if (rc) |
1622 | return; |
1623 | |
1624 | if (cur_mod->len == 0 && dev->poll_mod_count > 1) |
1625 | mod_timer(timer: &dev->listen_timer, expires: jiffies + PN533_LISTEN_TIME * HZ); |
1626 | } |
1627 | |
1628 | static int pn533_start_poll(struct nfc_dev *nfc_dev, |
1629 | u32 im_protocols, u32 tm_protocols) |
1630 | { |
1631 | struct pn533 *dev = nfc_get_drvdata(dev: nfc_dev); |
1632 | struct pn533_poll_modulations *cur_mod; |
1633 | struct sk_buff *skb; |
1634 | u8 rand_mod; |
1635 | int rc; |
1636 | |
1637 | dev_dbg(dev->dev, |
1638 | "%s: im protocols 0x%x tm protocols 0x%x\n" , |
1639 | __func__, im_protocols, tm_protocols); |
1640 | |
1641 | if (dev->tgt_active_prot) { |
1642 | nfc_err(dev->dev, |
1643 | "Cannot poll with a target already activated\n" ); |
1644 | return -EBUSY; |
1645 | } |
1646 | |
1647 | if (dev->tgt_mode) { |
1648 | nfc_err(dev->dev, |
1649 | "Cannot poll while already being activated\n" ); |
1650 | return -EBUSY; |
1651 | } |
1652 | |
1653 | if (tm_protocols) { |
1654 | dev->gb = nfc_get_local_general_bytes(dev: nfc_dev, gb_len: &dev->gb_len); |
1655 | if (dev->gb == NULL) |
1656 | tm_protocols = 0; |
1657 | } |
1658 | |
1659 | dev->poll_protocols = im_protocols; |
1660 | dev->listen_protocols = tm_protocols; |
1661 | if (dev->device_type == PN533_DEVICE_PN532_AUTOPOLL) { |
1662 | skb = pn533_alloc_skb(dev, size: 4 + 6); |
1663 | if (!skb) |
1664 | return -ENOMEM; |
1665 | |
1666 | *((u8 *)skb_put(skb, len: sizeof(u8))) = |
1667 | PN532_AUTOPOLL_POLLNR_INFINITE; |
1668 | *((u8 *)skb_put(skb, len: sizeof(u8))) = PN532_AUTOPOLL_PERIOD; |
1669 | |
1670 | if ((im_protocols & NFC_PROTO_MIFARE_MASK) && |
1671 | (im_protocols & NFC_PROTO_ISO14443_MASK) && |
1672 | (im_protocols & NFC_PROTO_NFC_DEP_MASK)) |
1673 | *((u8 *)skb_put(skb, len: sizeof(u8))) = |
1674 | PN532_AUTOPOLL_TYPE_GENERIC_106; |
1675 | else { |
1676 | if (im_protocols & NFC_PROTO_MIFARE_MASK) |
1677 | *((u8 *)skb_put(skb, len: sizeof(u8))) = |
1678 | PN532_AUTOPOLL_TYPE_MIFARE; |
1679 | |
1680 | if (im_protocols & NFC_PROTO_ISO14443_MASK) |
1681 | *((u8 *)skb_put(skb, len: sizeof(u8))) = |
1682 | PN532_AUTOPOLL_TYPE_ISOA; |
1683 | |
1684 | if (im_protocols & NFC_PROTO_NFC_DEP_MASK) { |
1685 | *((u8 *)skb_put(skb, len: sizeof(u8))) = |
1686 | PN532_AUTOPOLL_TYPE_DEP_PASSIVE_106; |
1687 | *((u8 *)skb_put(skb, len: sizeof(u8))) = |
1688 | PN532_AUTOPOLL_TYPE_DEP_PASSIVE_212; |
1689 | *((u8 *)skb_put(skb, len: sizeof(u8))) = |
1690 | PN532_AUTOPOLL_TYPE_DEP_PASSIVE_424; |
1691 | } |
1692 | } |
1693 | |
1694 | if (im_protocols & NFC_PROTO_FELICA_MASK || |
1695 | im_protocols & NFC_PROTO_NFC_DEP_MASK) { |
1696 | *((u8 *)skb_put(skb, len: sizeof(u8))) = |
1697 | PN532_AUTOPOLL_TYPE_FELICA212; |
1698 | *((u8 *)skb_put(skb, len: sizeof(u8))) = |
1699 | PN532_AUTOPOLL_TYPE_FELICA424; |
1700 | } |
1701 | |
1702 | if (im_protocols & NFC_PROTO_JEWEL_MASK) |
1703 | *((u8 *)skb_put(skb, len: sizeof(u8))) = |
1704 | PN532_AUTOPOLL_TYPE_JEWEL; |
1705 | |
1706 | if (im_protocols & NFC_PROTO_ISO14443_B_MASK) |
1707 | *((u8 *)skb_put(skb, len: sizeof(u8))) = |
1708 | PN532_AUTOPOLL_TYPE_ISOB; |
1709 | |
1710 | if (tm_protocols) |
1711 | *((u8 *)skb_put(skb, len: sizeof(u8))) = |
1712 | PN532_AUTOPOLL_TYPE_DEP_ACTIVE_106; |
1713 | |
1714 | rc = pn533_send_cmd_async(dev, PN533_CMD_IN_AUTOPOLL, req: skb, |
1715 | complete_cb: pn533_autopoll_complete, NULL); |
1716 | |
1717 | if (rc < 0) |
1718 | dev_kfree_skb(skb); |
1719 | else |
1720 | dev->poll_mod_count++; |
1721 | |
1722 | return rc; |
1723 | } |
1724 | |
1725 | pn533_poll_create_mod_list(dev, im_protocols, tm_protocols); |
1726 | |
1727 | /* Do not always start polling from the same modulation */ |
1728 | get_random_bytes(buf: &rand_mod, len: sizeof(rand_mod)); |
1729 | rand_mod %= dev->poll_mod_count; |
1730 | dev->poll_mod_curr = rand_mod; |
1731 | |
1732 | cur_mod = dev->poll_mod_active[dev->poll_mod_curr]; |
1733 | |
1734 | rc = pn533_send_poll_frame(dev); |
1735 | |
1736 | /* Start listen timer */ |
1737 | if (!rc && cur_mod->len == 0 && dev->poll_mod_count > 1) |
1738 | mod_timer(timer: &dev->listen_timer, expires: jiffies + PN533_LISTEN_TIME * HZ); |
1739 | |
1740 | return rc; |
1741 | } |
1742 | |
1743 | static void pn533_stop_poll(struct nfc_dev *nfc_dev) |
1744 | { |
1745 | struct pn533 *dev = nfc_get_drvdata(dev: nfc_dev); |
1746 | |
1747 | del_timer(timer: &dev->listen_timer); |
1748 | |
1749 | if (!dev->poll_mod_count) { |
1750 | dev_dbg(dev->dev, |
1751 | "Polling operation was not running\n" ); |
1752 | return; |
1753 | } |
1754 | |
1755 | dev->phy_ops->abort_cmd(dev, GFP_KERNEL); |
1756 | flush_delayed_work(dwork: &dev->poll_work); |
1757 | pn533_poll_reset_mod_list(dev); |
1758 | } |
1759 | |
1760 | static int pn533_activate_target_nfcdep(struct pn533 *dev) |
1761 | { |
1762 | struct pn533_cmd_activate_response *rsp; |
1763 | u16 gt_len; |
1764 | int rc; |
1765 | struct sk_buff *skb; |
1766 | struct sk_buff *resp; |
1767 | |
1768 | skb = pn533_alloc_skb(dev, size: sizeof(u8) * 2); /*TG + Next*/ |
1769 | if (!skb) |
1770 | return -ENOMEM; |
1771 | |
1772 | skb_put_u8(skb, val: 1); /* TG */ |
1773 | skb_put_u8(skb, val: 0); /* Next */ |
1774 | |
1775 | resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, req: skb); |
1776 | if (IS_ERR(ptr: resp)) |
1777 | return PTR_ERR(ptr: resp); |
1778 | |
1779 | rsp = (struct pn533_cmd_activate_response *)resp->data; |
1780 | rc = rsp->status & PN533_CMD_RET_MASK; |
1781 | if (rc != PN533_CMD_RET_SUCCESS) { |
1782 | nfc_err(dev->dev, |
1783 | "Target activation failed (error 0x%x)\n" , rc); |
1784 | dev_kfree_skb(resp); |
1785 | return -EIO; |
1786 | } |
1787 | |
1788 | /* ATR_RES general bytes are located at offset 16 */ |
1789 | gt_len = resp->len - 16; |
1790 | rc = nfc_set_remote_general_bytes(dev: dev->nfc_dev, gt: rsp->gt, gt_len); |
1791 | |
1792 | dev_kfree_skb(resp); |
1793 | return rc; |
1794 | } |
1795 | |
1796 | static int pn533_activate_target(struct nfc_dev *nfc_dev, |
1797 | struct nfc_target *target, u32 protocol) |
1798 | { |
1799 | struct pn533 *dev = nfc_get_drvdata(dev: nfc_dev); |
1800 | int rc; |
1801 | |
1802 | dev_dbg(dev->dev, "%s: protocol=%u\n" , __func__, protocol); |
1803 | |
1804 | if (dev->poll_mod_count) { |
1805 | nfc_err(dev->dev, |
1806 | "Cannot activate while polling\n" ); |
1807 | return -EBUSY; |
1808 | } |
1809 | |
1810 | if (dev->tgt_active_prot) { |
1811 | nfc_err(dev->dev, |
1812 | "There is already an active target\n" ); |
1813 | return -EBUSY; |
1814 | } |
1815 | |
1816 | if (!dev->tgt_available_prots) { |
1817 | nfc_err(dev->dev, |
1818 | "There is no available target to activate\n" ); |
1819 | return -EINVAL; |
1820 | } |
1821 | |
1822 | if (!(dev->tgt_available_prots & (1 << protocol))) { |
1823 | nfc_err(dev->dev, |
1824 | "Target doesn't support requested proto %u\n" , |
1825 | protocol); |
1826 | return -EINVAL; |
1827 | } |
1828 | |
1829 | if (protocol == NFC_PROTO_NFC_DEP) { |
1830 | rc = pn533_activate_target_nfcdep(dev); |
1831 | if (rc) { |
1832 | nfc_err(dev->dev, |
1833 | "Activating target with DEP failed %d\n" , rc); |
1834 | return rc; |
1835 | } |
1836 | } |
1837 | |
1838 | dev->tgt_active_prot = protocol; |
1839 | dev->tgt_available_prots = 0; |
1840 | |
1841 | return 0; |
1842 | } |
1843 | |
1844 | static int pn533_deactivate_target_complete(struct pn533 *dev, void *arg, |
1845 | struct sk_buff *resp) |
1846 | { |
1847 | int rc = 0; |
1848 | |
1849 | if (IS_ERR(ptr: resp)) { |
1850 | rc = PTR_ERR(ptr: resp); |
1851 | |
1852 | nfc_err(dev->dev, "Target release error %d\n" , rc); |
1853 | |
1854 | return rc; |
1855 | } |
1856 | |
1857 | rc = resp->data[0] & PN533_CMD_RET_MASK; |
1858 | if (rc != PN533_CMD_RET_SUCCESS) |
1859 | nfc_err(dev->dev, |
1860 | "Error 0x%x when releasing the target\n" , rc); |
1861 | |
1862 | dev_kfree_skb(resp); |
1863 | return rc; |
1864 | } |
1865 | |
1866 | static void pn533_deactivate_target(struct nfc_dev *nfc_dev, |
1867 | struct nfc_target *target, u8 mode) |
1868 | { |
1869 | struct pn533 *dev = nfc_get_drvdata(dev: nfc_dev); |
1870 | struct sk_buff *skb; |
1871 | int rc; |
1872 | |
1873 | if (!dev->tgt_active_prot) { |
1874 | nfc_err(dev->dev, "There is no active target\n" ); |
1875 | return; |
1876 | } |
1877 | |
1878 | dev->tgt_active_prot = 0; |
1879 | skb_queue_purge(list: &dev->resp_q); |
1880 | |
1881 | skb = pn533_alloc_skb(dev, size: sizeof(u8)); |
1882 | if (!skb) |
1883 | return; |
1884 | |
1885 | skb_put_u8(skb, val: 1); /* TG*/ |
1886 | |
1887 | rc = pn533_send_cmd_async(dev, PN533_CMD_IN_RELEASE, req: skb, |
1888 | complete_cb: pn533_deactivate_target_complete, NULL); |
1889 | if (rc < 0) { |
1890 | dev_kfree_skb(skb); |
1891 | nfc_err(dev->dev, "Target release error %d\n" , rc); |
1892 | } |
1893 | } |
1894 | |
1895 | |
1896 | static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg, |
1897 | struct sk_buff *resp) |
1898 | { |
1899 | struct pn533_cmd_jump_dep_response *rsp; |
1900 | u8 target_gt_len; |
1901 | int rc; |
1902 | u8 active = *(u8 *)arg; |
1903 | |
1904 | kfree(objp: arg); |
1905 | |
1906 | if (IS_ERR(ptr: resp)) |
1907 | return PTR_ERR(ptr: resp); |
1908 | |
1909 | if (dev->tgt_available_prots && |
1910 | !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) { |
1911 | nfc_err(dev->dev, |
1912 | "The target does not support DEP\n" ); |
1913 | rc = -EINVAL; |
1914 | goto error; |
1915 | } |
1916 | |
1917 | rsp = (struct pn533_cmd_jump_dep_response *)resp->data; |
1918 | |
1919 | rc = rsp->status & PN533_CMD_RET_MASK; |
1920 | if (rc != PN533_CMD_RET_SUCCESS) { |
1921 | nfc_err(dev->dev, |
1922 | "Bringing DEP link up failed (error 0x%x)\n" , rc); |
1923 | goto error; |
1924 | } |
1925 | |
1926 | if (!dev->tgt_available_prots) { |
1927 | struct nfc_target nfc_target; |
1928 | |
1929 | dev_dbg(dev->dev, "Creating new target\n" ); |
1930 | |
1931 | memset(&nfc_target, 0, sizeof(struct nfc_target)); |
1932 | |
1933 | nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK; |
1934 | nfc_target.nfcid1_len = 10; |
1935 | memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len); |
1936 | rc = nfc_targets_found(dev: dev->nfc_dev, targets: &nfc_target, ntargets: 1); |
1937 | if (rc) |
1938 | goto error; |
1939 | |
1940 | dev->tgt_available_prots = 0; |
1941 | } |
1942 | |
1943 | dev->tgt_active_prot = NFC_PROTO_NFC_DEP; |
1944 | |
1945 | /* ATR_RES general bytes are located at offset 17 */ |
1946 | target_gt_len = resp->len - 17; |
1947 | rc = nfc_set_remote_general_bytes(dev: dev->nfc_dev, |
1948 | gt: rsp->gt, gt_len: target_gt_len); |
1949 | if (rc == 0) |
1950 | rc = nfc_dep_link_is_up(dev: dev->nfc_dev, |
1951 | target_idx: dev->nfc_dev->targets[0].idx, |
1952 | comm_mode: !active, NFC_RF_INITIATOR); |
1953 | |
1954 | error: |
1955 | dev_kfree_skb(resp); |
1956 | return rc; |
1957 | } |
1958 | |
1959 | static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf); |
1960 | static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target, |
1961 | u8 comm_mode, u8 *gb, size_t gb_len) |
1962 | { |
1963 | struct pn533 *dev = nfc_get_drvdata(dev: nfc_dev); |
1964 | struct sk_buff *skb; |
1965 | int rc, skb_len; |
1966 | u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE]; |
1967 | u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3}; |
1968 | |
1969 | if (dev->poll_mod_count) { |
1970 | nfc_err(dev->dev, |
1971 | "Cannot bring the DEP link up while polling\n" ); |
1972 | return -EBUSY; |
1973 | } |
1974 | |
1975 | if (dev->tgt_active_prot) { |
1976 | nfc_err(dev->dev, |
1977 | "There is already an active target\n" ); |
1978 | return -EBUSY; |
1979 | } |
1980 | |
1981 | skb_len = 3 + gb_len; /* ActPass + BR + Next */ |
1982 | skb_len += PASSIVE_DATA_LEN; |
1983 | |
1984 | /* NFCID3 */ |
1985 | skb_len += NFC_NFCID3_MAXSIZE; |
1986 | if (target && !target->nfcid2_len) { |
1987 | nfcid3[0] = 0x1; |
1988 | nfcid3[1] = 0xfe; |
1989 | get_random_bytes(buf: nfcid3 + 2, len: 6); |
1990 | } |
1991 | |
1992 | skb = pn533_alloc_skb(dev, size: skb_len); |
1993 | if (!skb) |
1994 | return -ENOMEM; |
1995 | |
1996 | skb_put_u8(skb, val: !comm_mode); /* ActPass */ |
1997 | skb_put_u8(skb, val: 0x02); /* 424 kbps */ |
1998 | |
1999 | next = skb_put(skb, len: 1); /* Next */ |
2000 | *next = 0; |
2001 | |
2002 | /* Copy passive data */ |
2003 | skb_put_data(skb, data: passive_data, PASSIVE_DATA_LEN); |
2004 | *next |= 1; |
2005 | |
2006 | /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */ |
2007 | if (target && target->nfcid2_len) |
2008 | memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2, |
2009 | target->nfcid2_len); |
2010 | else |
2011 | skb_put_data(skb, data: nfcid3, NFC_NFCID3_MAXSIZE); |
2012 | *next |= 2; |
2013 | |
2014 | if (gb != NULL && gb_len > 0) { |
2015 | skb_put_data(skb, data: gb, len: gb_len); |
2016 | *next |= 4; /* We have some Gi */ |
2017 | } else { |
2018 | *next = 0; |
2019 | } |
2020 | |
2021 | arg = kmalloc(size: sizeof(*arg), GFP_KERNEL); |
2022 | if (!arg) { |
2023 | dev_kfree_skb(skb); |
2024 | return -ENOMEM; |
2025 | } |
2026 | |
2027 | *arg = !comm_mode; |
2028 | |
2029 | pn533_rf_field(nfc_dev: dev->nfc_dev, rf: 0); |
2030 | |
2031 | rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, req: skb, |
2032 | complete_cb: pn533_in_dep_link_up_complete, complete_cb_context: arg); |
2033 | |
2034 | if (rc < 0) { |
2035 | dev_kfree_skb(skb); |
2036 | kfree(objp: arg); |
2037 | } |
2038 | |
2039 | return rc; |
2040 | } |
2041 | |
2042 | static int pn533_dep_link_down(struct nfc_dev *nfc_dev) |
2043 | { |
2044 | struct pn533 *dev = nfc_get_drvdata(dev: nfc_dev); |
2045 | |
2046 | pn533_poll_reset_mod_list(dev); |
2047 | |
2048 | if (dev->tgt_mode || dev->tgt_active_prot) |
2049 | dev->phy_ops->abort_cmd(dev, GFP_KERNEL); |
2050 | |
2051 | dev->tgt_active_prot = 0; |
2052 | dev->tgt_mode = 0; |
2053 | |
2054 | skb_queue_purge(list: &dev->resp_q); |
2055 | |
2056 | return 0; |
2057 | } |
2058 | |
2059 | struct pn533_data_exchange_arg { |
2060 | data_exchange_cb_t cb; |
2061 | void *cb_context; |
2062 | }; |
2063 | |
2064 | static struct sk_buff *pn533_build_response(struct pn533 *dev) |
2065 | { |
2066 | struct sk_buff *skb, *tmp, *t; |
2067 | unsigned int skb_len = 0, tmp_len = 0; |
2068 | |
2069 | if (skb_queue_empty(list: &dev->resp_q)) |
2070 | return NULL; |
2071 | |
2072 | if (skb_queue_len(list_: &dev->resp_q) == 1) { |
2073 | skb = skb_dequeue(list: &dev->resp_q); |
2074 | goto out; |
2075 | } |
2076 | |
2077 | skb_queue_walk_safe(&dev->resp_q, tmp, t) |
2078 | skb_len += tmp->len; |
2079 | |
2080 | dev_dbg(dev->dev, "%s total length %d\n" , |
2081 | __func__, skb_len); |
2082 | |
2083 | skb = alloc_skb(size: skb_len, GFP_KERNEL); |
2084 | if (skb == NULL) |
2085 | goto out; |
2086 | |
2087 | skb_put(skb, len: skb_len); |
2088 | |
2089 | skb_queue_walk_safe(&dev->resp_q, tmp, t) { |
2090 | memcpy(skb->data + tmp_len, tmp->data, tmp->len); |
2091 | tmp_len += tmp->len; |
2092 | } |
2093 | |
2094 | out: |
2095 | skb_queue_purge(list: &dev->resp_q); |
2096 | |
2097 | return skb; |
2098 | } |
2099 | |
2100 | static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg, |
2101 | struct sk_buff *resp) |
2102 | { |
2103 | struct pn533_data_exchange_arg *arg = _arg; |
2104 | struct sk_buff *skb; |
2105 | int rc = 0; |
2106 | u8 status, ret, mi; |
2107 | |
2108 | if (IS_ERR(ptr: resp)) { |
2109 | rc = PTR_ERR(ptr: resp); |
2110 | goto _error; |
2111 | } |
2112 | |
2113 | status = resp->data[0]; |
2114 | ret = status & PN533_CMD_RET_MASK; |
2115 | mi = status & PN533_CMD_MI_MASK; |
2116 | |
2117 | skb_pull(skb: resp, len: sizeof(status)); |
2118 | |
2119 | if (ret != PN533_CMD_RET_SUCCESS) { |
2120 | nfc_err(dev->dev, |
2121 | "Exchanging data failed (error 0x%x)\n" , ret); |
2122 | rc = -EIO; |
2123 | goto error; |
2124 | } |
2125 | |
2126 | skb_queue_tail(list: &dev->resp_q, newsk: resp); |
2127 | |
2128 | if (mi) { |
2129 | dev->cmd_complete_mi_arg = arg; |
2130 | queue_work(wq: dev->wq, work: &dev->mi_rx_work); |
2131 | return -EINPROGRESS; |
2132 | } |
2133 | |
2134 | /* Prepare for the next round */ |
2135 | if (skb_queue_len(list_: &dev->fragment_skb) > 0) { |
2136 | dev->cmd_complete_dep_arg = arg; |
2137 | queue_work(wq: dev->wq, work: &dev->mi_tx_work); |
2138 | |
2139 | return -EINPROGRESS; |
2140 | } |
2141 | |
2142 | skb = pn533_build_response(dev); |
2143 | if (!skb) { |
2144 | rc = -ENOMEM; |
2145 | goto error; |
2146 | } |
2147 | |
2148 | arg->cb(arg->cb_context, skb, 0); |
2149 | kfree(objp: arg); |
2150 | return 0; |
2151 | |
2152 | error: |
2153 | dev_kfree_skb(resp); |
2154 | _error: |
2155 | skb_queue_purge(list: &dev->resp_q); |
2156 | arg->cb(arg->cb_context, NULL, rc); |
2157 | kfree(objp: arg); |
2158 | return rc; |
2159 | } |
2160 | |
2161 | /* |
2162 | * Receive an incoming pn533 frame. skb contains only header and payload. |
2163 | * If skb == NULL, it is a notification that the link below is dead. |
2164 | */ |
2165 | void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status) |
2166 | { |
2167 | if (!dev->cmd) |
2168 | goto sched_wq; |
2169 | |
2170 | dev->cmd->status = status; |
2171 | |
2172 | if (status != 0) { |
2173 | dev_dbg(dev->dev, "%s: Error received: %d\n" , __func__, status); |
2174 | goto sched_wq; |
2175 | } |
2176 | |
2177 | if (skb == NULL) { |
2178 | dev_err(dev->dev, "NULL Frame -> link is dead\n" ); |
2179 | goto sched_wq; |
2180 | } |
2181 | |
2182 | if (pn533_rx_frame_is_ack(skb->data)) { |
2183 | dev_dbg(dev->dev, "%s: Received ACK frame\n" , __func__); |
2184 | dev_kfree_skb(skb); |
2185 | return; |
2186 | } |
2187 | |
2188 | print_hex_dump_debug("PN533 RX: " , DUMP_PREFIX_NONE, 16, 1, skb->data, |
2189 | dev->ops->rx_frame_size(skb->data), false); |
2190 | |
2191 | if (!dev->ops->rx_is_frame_valid(skb->data, dev)) { |
2192 | nfc_err(dev->dev, "Received an invalid frame\n" ); |
2193 | dev->cmd->status = -EIO; |
2194 | } else if (!pn533_rx_frame_is_cmd_response(dev, skb->data)) { |
2195 | nfc_err(dev->dev, "It it not the response to the last command\n" ); |
2196 | dev->cmd->status = -EIO; |
2197 | } |
2198 | |
2199 | dev->cmd->resp = skb; |
2200 | |
2201 | sched_wq: |
2202 | queue_work(wq: dev->wq, work: &dev->cmd_complete_work); |
2203 | } |
2204 | EXPORT_SYMBOL(pn533_recv_frame); |
2205 | |
2206 | /* Split the Tx skb into small chunks */ |
2207 | static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb) |
2208 | { |
2209 | struct sk_buff *frag; |
2210 | int frag_size; |
2211 | |
2212 | do { |
2213 | /* Remaining size */ |
2214 | if (skb->len > PN533_CMD_DATAFRAME_MAXLEN) |
2215 | frag_size = PN533_CMD_DATAFRAME_MAXLEN; |
2216 | else |
2217 | frag_size = skb->len; |
2218 | |
2219 | /* Allocate and reserve */ |
2220 | frag = pn533_alloc_skb(dev, size: frag_size); |
2221 | if (!frag) { |
2222 | skb_queue_purge(list: &dev->fragment_skb); |
2223 | return -ENOMEM; |
2224 | } |
2225 | |
2226 | if (!dev->tgt_mode) { |
2227 | /* Reserve the TG/MI byte */ |
2228 | skb_reserve(skb: frag, len: 1); |
2229 | |
2230 | /* MI + TG */ |
2231 | if (frag_size == PN533_CMD_DATAFRAME_MAXLEN) |
2232 | *(u8 *)skb_push(skb: frag, len: sizeof(u8)) = |
2233 | (PN533_CMD_MI_MASK | 1); |
2234 | else |
2235 | *(u8 *)skb_push(skb: frag, len: sizeof(u8)) = 1; /* TG */ |
2236 | } |
2237 | |
2238 | skb_put_data(skb: frag, data: skb->data, len: frag_size); |
2239 | |
2240 | /* Reduce the size of incoming buffer */ |
2241 | skb_pull(skb, len: frag_size); |
2242 | |
2243 | /* Add this to skb_queue */ |
2244 | skb_queue_tail(list: &dev->fragment_skb, newsk: frag); |
2245 | |
2246 | } while (skb->len > 0); |
2247 | |
2248 | dev_kfree_skb(skb); |
2249 | |
2250 | return skb_queue_len(list_: &dev->fragment_skb); |
2251 | } |
2252 | |
2253 | static int pn533_transceive(struct nfc_dev *nfc_dev, |
2254 | struct nfc_target *target, struct sk_buff *skb, |
2255 | data_exchange_cb_t cb, void *cb_context) |
2256 | { |
2257 | struct pn533 *dev = nfc_get_drvdata(dev: nfc_dev); |
2258 | struct pn533_data_exchange_arg *arg = NULL; |
2259 | int rc; |
2260 | |
2261 | if (!dev->tgt_active_prot) { |
2262 | nfc_err(dev->dev, |
2263 | "Can't exchange data if there is no active target\n" ); |
2264 | rc = -EINVAL; |
2265 | goto error; |
2266 | } |
2267 | |
2268 | arg = kmalloc(size: sizeof(*arg), GFP_KERNEL); |
2269 | if (!arg) { |
2270 | rc = -ENOMEM; |
2271 | goto error; |
2272 | } |
2273 | |
2274 | arg->cb = cb; |
2275 | arg->cb_context = cb_context; |
2276 | |
2277 | switch (dev->device_type) { |
2278 | case PN533_DEVICE_PASORI: |
2279 | if (dev->tgt_active_prot == NFC_PROTO_FELICA) { |
2280 | rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU, |
2281 | req: skb, |
2282 | complete_cb: pn533_data_exchange_complete, |
2283 | complete_cb_context: arg); |
2284 | |
2285 | break; |
2286 | } |
2287 | fallthrough; |
2288 | default: |
2289 | /* jumbo frame ? */ |
2290 | if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) { |
2291 | rc = pn533_fill_fragment_skbs(dev, skb); |
2292 | if (rc < 0) |
2293 | goto error; |
2294 | |
2295 | skb = skb_dequeue(list: &dev->fragment_skb); |
2296 | if (!skb) { |
2297 | rc = -EIO; |
2298 | goto error; |
2299 | } |
2300 | } else { |
2301 | *(u8 *)skb_push(skb, len: sizeof(u8)) = 1; /* TG */ |
2302 | } |
2303 | |
2304 | rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE, |
2305 | req: skb, complete_cb: pn533_data_exchange_complete, |
2306 | complete_cb_context: arg); |
2307 | |
2308 | break; |
2309 | } |
2310 | |
2311 | if (rc < 0) /* rc from send_async */ |
2312 | goto error; |
2313 | |
2314 | return 0; |
2315 | |
2316 | error: |
2317 | kfree(objp: arg); |
2318 | dev_kfree_skb(skb); |
2319 | return rc; |
2320 | } |
2321 | |
2322 | static int pn533_tm_send_complete(struct pn533 *dev, void *arg, |
2323 | struct sk_buff *resp) |
2324 | { |
2325 | u8 status; |
2326 | |
2327 | if (IS_ERR(ptr: resp)) |
2328 | return PTR_ERR(ptr: resp); |
2329 | |
2330 | status = resp->data[0]; |
2331 | |
2332 | /* Prepare for the next round */ |
2333 | if (skb_queue_len(list_: &dev->fragment_skb) > 0) { |
2334 | queue_work(wq: dev->wq, work: &dev->mi_tm_tx_work); |
2335 | return -EINPROGRESS; |
2336 | } |
2337 | dev_kfree_skb(resp); |
2338 | |
2339 | if (status != 0) { |
2340 | nfc_tm_deactivated(dev: dev->nfc_dev); |
2341 | |
2342 | dev->tgt_mode = 0; |
2343 | |
2344 | return 0; |
2345 | } |
2346 | |
2347 | queue_work(wq: dev->wq, work: &dev->tg_work); |
2348 | |
2349 | return 0; |
2350 | } |
2351 | |
2352 | static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb) |
2353 | { |
2354 | struct pn533 *dev = nfc_get_drvdata(dev: nfc_dev); |
2355 | int rc; |
2356 | |
2357 | /* let's split in multiple chunks if size's too big */ |
2358 | if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) { |
2359 | rc = pn533_fill_fragment_skbs(dev, skb); |
2360 | if (rc < 0) |
2361 | goto error; |
2362 | |
2363 | /* get the first skb */ |
2364 | skb = skb_dequeue(list: &dev->fragment_skb); |
2365 | if (!skb) { |
2366 | rc = -EIO; |
2367 | goto error; |
2368 | } |
2369 | |
2370 | rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_META_DATA, req: skb, |
2371 | complete_cb: pn533_tm_send_complete, NULL); |
2372 | } else { |
2373 | /* Send th skb */ |
2374 | rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, req: skb, |
2375 | complete_cb: pn533_tm_send_complete, NULL); |
2376 | } |
2377 | |
2378 | error: |
2379 | if (rc < 0) { |
2380 | dev_kfree_skb(skb); |
2381 | skb_queue_purge(list: &dev->fragment_skb); |
2382 | } |
2383 | |
2384 | return rc; |
2385 | } |
2386 | |
2387 | static void pn533_wq_mi_recv(struct work_struct *work) |
2388 | { |
2389 | struct pn533 *dev = container_of(work, struct pn533, mi_rx_work); |
2390 | struct sk_buff *skb; |
2391 | int rc; |
2392 | |
2393 | skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN); |
2394 | if (!skb) |
2395 | goto error; |
2396 | |
2397 | switch (dev->device_type) { |
2398 | case PN533_DEVICE_PASORI: |
2399 | if (dev->tgt_active_prot == NFC_PROTO_FELICA) { |
2400 | rc = pn533_send_cmd_direct_async(dev, |
2401 | PN533_CMD_IN_COMM_THRU, |
2402 | req: skb, |
2403 | complete_cb: pn533_data_exchange_complete, |
2404 | complete_cb_context: dev->cmd_complete_mi_arg); |
2405 | |
2406 | break; |
2407 | } |
2408 | fallthrough; |
2409 | default: |
2410 | skb_put_u8(skb, val: 1); /*TG*/ |
2411 | |
2412 | rc = pn533_send_cmd_direct_async(dev, |
2413 | PN533_CMD_IN_DATA_EXCHANGE, |
2414 | req: skb, |
2415 | complete_cb: pn533_data_exchange_complete, |
2416 | complete_cb_context: dev->cmd_complete_mi_arg); |
2417 | |
2418 | break; |
2419 | } |
2420 | |
2421 | if (rc == 0) /* success */ |
2422 | return; |
2423 | |
2424 | nfc_err(dev->dev, |
2425 | "Error %d when trying to perform data_exchange\n" , rc); |
2426 | |
2427 | dev_kfree_skb(skb); |
2428 | kfree(objp: dev->cmd_complete_mi_arg); |
2429 | |
2430 | error: |
2431 | dev->phy_ops->send_ack(dev, GFP_KERNEL); |
2432 | queue_work(wq: dev->wq, work: &dev->cmd_work); |
2433 | } |
2434 | |
2435 | static void pn533_wq_mi_send(struct work_struct *work) |
2436 | { |
2437 | struct pn533 *dev = container_of(work, struct pn533, mi_tx_work); |
2438 | struct sk_buff *skb; |
2439 | int rc; |
2440 | |
2441 | /* Grab the first skb in the queue */ |
2442 | skb = skb_dequeue(list: &dev->fragment_skb); |
2443 | |
2444 | if (skb == NULL) { /* No more data */ |
2445 | /* Reset the queue for future use */ |
2446 | skb_queue_head_init(list: &dev->fragment_skb); |
2447 | goto error; |
2448 | } |
2449 | |
2450 | switch (dev->device_type) { |
2451 | case PN533_DEVICE_PASORI: |
2452 | if (dev->tgt_active_prot != NFC_PROTO_FELICA) { |
2453 | rc = -EIO; |
2454 | break; |
2455 | } |
2456 | |
2457 | rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU, |
2458 | req: skb, |
2459 | complete_cb: pn533_data_exchange_complete, |
2460 | complete_cb_context: dev->cmd_complete_dep_arg); |
2461 | |
2462 | break; |
2463 | |
2464 | default: |
2465 | /* Still some fragments? */ |
2466 | rc = pn533_send_cmd_direct_async(dev, |
2467 | PN533_CMD_IN_DATA_EXCHANGE, |
2468 | req: skb, |
2469 | complete_cb: pn533_data_exchange_complete, |
2470 | complete_cb_context: dev->cmd_complete_dep_arg); |
2471 | |
2472 | break; |
2473 | } |
2474 | |
2475 | if (rc == 0) /* success */ |
2476 | return; |
2477 | |
2478 | nfc_err(dev->dev, |
2479 | "Error %d when trying to perform data_exchange\n" , rc); |
2480 | |
2481 | dev_kfree_skb(skb); |
2482 | kfree(objp: dev->cmd_complete_dep_arg); |
2483 | |
2484 | error: |
2485 | dev->phy_ops->send_ack(dev, GFP_KERNEL); |
2486 | queue_work(wq: dev->wq, work: &dev->cmd_work); |
2487 | } |
2488 | |
2489 | static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata, |
2490 | u8 cfgdata_len) |
2491 | { |
2492 | struct sk_buff *skb; |
2493 | struct sk_buff *resp; |
2494 | int skb_len; |
2495 | |
2496 | skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */ |
2497 | |
2498 | skb = pn533_alloc_skb(dev, size: skb_len); |
2499 | if (!skb) |
2500 | return -ENOMEM; |
2501 | |
2502 | skb_put_u8(skb, val: cfgitem); |
2503 | skb_put_data(skb, data: cfgdata, len: cfgdata_len); |
2504 | |
2505 | resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, req: skb); |
2506 | if (IS_ERR(ptr: resp)) |
2507 | return PTR_ERR(ptr: resp); |
2508 | |
2509 | dev_kfree_skb(resp); |
2510 | return 0; |
2511 | } |
2512 | |
2513 | static int pn533_get_firmware_version(struct pn533 *dev, |
2514 | struct pn533_fw_version *fv) |
2515 | { |
2516 | struct sk_buff *skb; |
2517 | struct sk_buff *resp; |
2518 | |
2519 | skb = pn533_alloc_skb(dev, size: 0); |
2520 | if (!skb) |
2521 | return -ENOMEM; |
2522 | |
2523 | resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, req: skb); |
2524 | if (IS_ERR(ptr: resp)) |
2525 | return PTR_ERR(ptr: resp); |
2526 | |
2527 | fv->ic = resp->data[0]; |
2528 | fv->ver = resp->data[1]; |
2529 | fv->rev = resp->data[2]; |
2530 | fv->support = resp->data[3]; |
2531 | |
2532 | dev_kfree_skb(resp); |
2533 | return 0; |
2534 | } |
2535 | |
2536 | static int pn533_pasori_fw_reset(struct pn533 *dev) |
2537 | { |
2538 | struct sk_buff *skb; |
2539 | struct sk_buff *resp; |
2540 | |
2541 | skb = pn533_alloc_skb(dev, size: sizeof(u8)); |
2542 | if (!skb) |
2543 | return -ENOMEM; |
2544 | |
2545 | skb_put_u8(skb, val: 0x1); |
2546 | |
2547 | resp = pn533_send_cmd_sync(dev, cmd_code: 0x18, req: skb); |
2548 | if (IS_ERR(ptr: resp)) |
2549 | return PTR_ERR(ptr: resp); |
2550 | |
2551 | dev_kfree_skb(resp); |
2552 | |
2553 | return 0; |
2554 | } |
2555 | |
2556 | static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf) |
2557 | { |
2558 | struct pn533 *dev = nfc_get_drvdata(dev: nfc_dev); |
2559 | u8 rf_field = !!rf; |
2560 | int rc; |
2561 | |
2562 | rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA; |
2563 | |
2564 | rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD, |
2565 | cfgdata: (u8 *)&rf_field, cfgdata_len: 1); |
2566 | if (rc) { |
2567 | nfc_err(dev->dev, "Error on setting RF field\n" ); |
2568 | return rc; |
2569 | } |
2570 | |
2571 | return 0; |
2572 | } |
2573 | |
2574 | static int pn532_sam_configuration(struct nfc_dev *nfc_dev) |
2575 | { |
2576 | struct pn533 *dev = nfc_get_drvdata(dev: nfc_dev); |
2577 | struct sk_buff *skb; |
2578 | struct sk_buff *resp; |
2579 | |
2580 | skb = pn533_alloc_skb(dev, size: 1); |
2581 | if (!skb) |
2582 | return -ENOMEM; |
2583 | |
2584 | skb_put_u8(skb, val: 0x01); |
2585 | |
2586 | resp = pn533_send_cmd_sync(dev, PN533_CMD_SAM_CONFIGURATION, req: skb); |
2587 | if (IS_ERR(ptr: resp)) |
2588 | return PTR_ERR(ptr: resp); |
2589 | |
2590 | dev_kfree_skb(resp); |
2591 | return 0; |
2592 | } |
2593 | |
2594 | static int pn533_dev_up(struct nfc_dev *nfc_dev) |
2595 | { |
2596 | struct pn533 *dev = nfc_get_drvdata(dev: nfc_dev); |
2597 | int rc; |
2598 | |
2599 | if (dev->phy_ops->dev_up) { |
2600 | rc = dev->phy_ops->dev_up(dev); |
2601 | if (rc) |
2602 | return rc; |
2603 | } |
2604 | |
2605 | if ((dev->device_type == PN533_DEVICE_PN532) || |
2606 | (dev->device_type == PN533_DEVICE_PN532_AUTOPOLL)) { |
2607 | rc = pn532_sam_configuration(nfc_dev); |
2608 | |
2609 | if (rc) |
2610 | return rc; |
2611 | } |
2612 | |
2613 | return pn533_rf_field(nfc_dev, rf: 1); |
2614 | } |
2615 | |
2616 | static int pn533_dev_down(struct nfc_dev *nfc_dev) |
2617 | { |
2618 | struct pn533 *dev = nfc_get_drvdata(dev: nfc_dev); |
2619 | int ret; |
2620 | |
2621 | ret = pn533_rf_field(nfc_dev, rf: 0); |
2622 | if (dev->phy_ops->dev_down && !ret) |
2623 | ret = dev->phy_ops->dev_down(dev); |
2624 | |
2625 | return ret; |
2626 | } |
2627 | |
2628 | static const struct nfc_ops pn533_nfc_ops = { |
2629 | .dev_up = pn533_dev_up, |
2630 | .dev_down = pn533_dev_down, |
2631 | .dep_link_up = pn533_dep_link_up, |
2632 | .dep_link_down = pn533_dep_link_down, |
2633 | .start_poll = pn533_start_poll, |
2634 | .stop_poll = pn533_stop_poll, |
2635 | .activate_target = pn533_activate_target, |
2636 | .deactivate_target = pn533_deactivate_target, |
2637 | .im_transceive = pn533_transceive, |
2638 | .tm_send = pn533_tm_send, |
2639 | }; |
2640 | |
2641 | static int pn533_setup(struct pn533 *dev) |
2642 | { |
2643 | struct pn533_config_max_retries max_retries; |
2644 | struct pn533_config_timing timing; |
2645 | u8 pasori_cfg[3] = {0x08, 0x01, 0x08}; |
2646 | int rc; |
2647 | |
2648 | switch (dev->device_type) { |
2649 | case PN533_DEVICE_STD: |
2650 | case PN533_DEVICE_PASORI: |
2651 | case PN533_DEVICE_ACR122U: |
2652 | case PN533_DEVICE_PN532: |
2653 | case PN533_DEVICE_PN532_AUTOPOLL: |
2654 | max_retries.mx_rty_atr = 0x2; |
2655 | max_retries.mx_rty_psl = 0x1; |
2656 | max_retries.mx_rty_passive_act = |
2657 | PN533_CONFIG_MAX_RETRIES_NO_RETRY; |
2658 | |
2659 | timing.rfu = PN533_CONFIG_TIMING_102; |
2660 | timing.atr_res_timeout = PN533_CONFIG_TIMING_102; |
2661 | timing.dep_timeout = PN533_CONFIG_TIMING_204; |
2662 | |
2663 | break; |
2664 | |
2665 | default: |
2666 | nfc_err(dev->dev, "Unknown device type %d\n" , |
2667 | dev->device_type); |
2668 | return -EINVAL; |
2669 | } |
2670 | |
2671 | rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES, |
2672 | cfgdata: (u8 *)&max_retries, cfgdata_len: sizeof(max_retries)); |
2673 | if (rc) { |
2674 | nfc_err(dev->dev, |
2675 | "Error on setting MAX_RETRIES config\n" ); |
2676 | return rc; |
2677 | } |
2678 | |
2679 | |
2680 | rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING, |
2681 | cfgdata: (u8 *)&timing, cfgdata_len: sizeof(timing)); |
2682 | if (rc) { |
2683 | nfc_err(dev->dev, "Error on setting RF timings\n" ); |
2684 | return rc; |
2685 | } |
2686 | |
2687 | switch (dev->device_type) { |
2688 | case PN533_DEVICE_STD: |
2689 | case PN533_DEVICE_PN532: |
2690 | case PN533_DEVICE_PN532_AUTOPOLL: |
2691 | break; |
2692 | |
2693 | case PN533_DEVICE_PASORI: |
2694 | pn533_pasori_fw_reset(dev); |
2695 | |
2696 | rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI, |
2697 | cfgdata: pasori_cfg, cfgdata_len: 3); |
2698 | if (rc) { |
2699 | nfc_err(dev->dev, |
2700 | "Error while settings PASORI config\n" ); |
2701 | return rc; |
2702 | } |
2703 | |
2704 | pn533_pasori_fw_reset(dev); |
2705 | |
2706 | break; |
2707 | } |
2708 | |
2709 | return 0; |
2710 | } |
2711 | |
2712 | int pn533_finalize_setup(struct pn533 *dev) |
2713 | { |
2714 | |
2715 | struct pn533_fw_version fw_ver; |
2716 | int rc; |
2717 | |
2718 | memset(&fw_ver, 0, sizeof(fw_ver)); |
2719 | |
2720 | rc = pn533_get_firmware_version(dev, fv: &fw_ver); |
2721 | if (rc) { |
2722 | nfc_err(dev->dev, "Unable to get FW version\n" ); |
2723 | return rc; |
2724 | } |
2725 | |
2726 | nfc_info(dev->dev, "NXP PN5%02X firmware ver %d.%d now attached\n" , |
2727 | fw_ver.ic, fw_ver.ver, fw_ver.rev); |
2728 | |
2729 | rc = pn533_setup(dev); |
2730 | if (rc) |
2731 | return rc; |
2732 | |
2733 | return 0; |
2734 | } |
2735 | EXPORT_SYMBOL_GPL(pn533_finalize_setup); |
2736 | |
2737 | struct pn533 *pn53x_common_init(u32 device_type, |
2738 | enum pn533_protocol_type protocol_type, |
2739 | void *phy, |
2740 | const struct pn533_phy_ops *phy_ops, |
2741 | struct pn533_frame_ops *fops, |
2742 | struct device *dev) |
2743 | { |
2744 | struct pn533 *priv; |
2745 | |
2746 | priv = kzalloc(size: sizeof(*priv), GFP_KERNEL); |
2747 | if (!priv) |
2748 | return ERR_PTR(error: -ENOMEM); |
2749 | |
2750 | priv->phy = phy; |
2751 | priv->phy_ops = phy_ops; |
2752 | priv->dev = dev; |
2753 | if (fops != NULL) |
2754 | priv->ops = fops; |
2755 | else |
2756 | priv->ops = &pn533_std_frame_ops; |
2757 | |
2758 | priv->protocol_type = protocol_type; |
2759 | priv->device_type = device_type; |
2760 | |
2761 | mutex_init(&priv->cmd_lock); |
2762 | |
2763 | INIT_WORK(&priv->cmd_work, pn533_wq_cmd); |
2764 | INIT_WORK(&priv->cmd_complete_work, pn533_wq_cmd_complete); |
2765 | INIT_WORK(&priv->mi_rx_work, pn533_wq_mi_recv); |
2766 | INIT_WORK(&priv->mi_tx_work, pn533_wq_mi_send); |
2767 | INIT_WORK(&priv->tg_work, pn533_wq_tg_get_data); |
2768 | INIT_WORK(&priv->mi_tm_rx_work, pn533_wq_tm_mi_recv); |
2769 | INIT_WORK(&priv->mi_tm_tx_work, pn533_wq_tm_mi_send); |
2770 | INIT_DELAYED_WORK(&priv->poll_work, pn533_wq_poll); |
2771 | INIT_WORK(&priv->rf_work, pn533_wq_rf); |
2772 | priv->wq = alloc_ordered_workqueue("pn533" , 0); |
2773 | if (priv->wq == NULL) |
2774 | goto error; |
2775 | |
2776 | timer_setup(&priv->listen_timer, pn533_listen_mode_timer, 0); |
2777 | |
2778 | skb_queue_head_init(list: &priv->resp_q); |
2779 | skb_queue_head_init(list: &priv->fragment_skb); |
2780 | |
2781 | INIT_LIST_HEAD(list: &priv->cmd_queue); |
2782 | return priv; |
2783 | |
2784 | error: |
2785 | kfree(objp: priv); |
2786 | return ERR_PTR(error: -ENOMEM); |
2787 | } |
2788 | EXPORT_SYMBOL_GPL(pn53x_common_init); |
2789 | |
2790 | void pn53x_common_clean(struct pn533 *priv) |
2791 | { |
2792 | struct pn533_cmd *cmd, *n; |
2793 | |
2794 | /* delete the timer before cleanup the worker */ |
2795 | timer_shutdown_sync(timer: &priv->listen_timer); |
2796 | |
2797 | flush_delayed_work(dwork: &priv->poll_work); |
2798 | destroy_workqueue(wq: priv->wq); |
2799 | |
2800 | skb_queue_purge(list: &priv->resp_q); |
2801 | |
2802 | list_for_each_entry_safe(cmd, n, &priv->cmd_queue, queue) { |
2803 | list_del(entry: &cmd->queue); |
2804 | kfree(objp: cmd); |
2805 | } |
2806 | |
2807 | kfree(objp: priv); |
2808 | } |
2809 | EXPORT_SYMBOL_GPL(pn53x_common_clean); |
2810 | |
2811 | int pn532_i2c_nfc_alloc(struct pn533 *priv, u32 protocols, |
2812 | struct device *parent) |
2813 | { |
2814 | priv->nfc_dev = nfc_allocate_device(ops: &pn533_nfc_ops, supported_protocols: protocols, |
2815 | tx_headroom: priv->ops->tx_header_len + |
2816 | PN533_CMD_DATAEXCH_HEAD_LEN, |
2817 | tx_tailroom: priv->ops->tx_tail_len); |
2818 | if (!priv->nfc_dev) |
2819 | return -ENOMEM; |
2820 | |
2821 | nfc_set_parent_dev(nfc_dev: priv->nfc_dev, dev: parent); |
2822 | nfc_set_drvdata(dev: priv->nfc_dev, data: priv); |
2823 | return 0; |
2824 | } |
2825 | EXPORT_SYMBOL_GPL(pn532_i2c_nfc_alloc); |
2826 | |
2827 | int pn53x_register_nfc(struct pn533 *priv, u32 protocols, |
2828 | struct device *parent) |
2829 | { |
2830 | int rc; |
2831 | |
2832 | rc = pn532_i2c_nfc_alloc(priv, protocols, parent); |
2833 | if (rc) |
2834 | return rc; |
2835 | |
2836 | rc = nfc_register_device(dev: priv->nfc_dev); |
2837 | if (rc) |
2838 | nfc_free_device(dev: priv->nfc_dev); |
2839 | |
2840 | return rc; |
2841 | } |
2842 | EXPORT_SYMBOL_GPL(pn53x_register_nfc); |
2843 | |
2844 | void pn53x_unregister_nfc(struct pn533 *priv) |
2845 | { |
2846 | nfc_unregister_device(dev: priv->nfc_dev); |
2847 | nfc_free_device(dev: priv->nfc_dev); |
2848 | } |
2849 | EXPORT_SYMBOL_GPL(pn53x_unregister_nfc); |
2850 | |
2851 | MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>" ); |
2852 | MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>" ); |
2853 | MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>" ); |
2854 | MODULE_DESCRIPTION("PN533 driver ver " VERSION); |
2855 | MODULE_VERSION(VERSION); |
2856 | MODULE_LICENSE("GPL" ); |
2857 | |