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 */
pn533_ext_checksum(u16 value)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 */
pn533_std_checksum(u8 value)230 static inline u8 pn533_std_checksum(u8 value)
231 {
232 return ~value + 1;
233 }
234
235 /* The rule: sum(data elements) + checksum = 0 */
pn533_std_data_checksum(u8 * data,int datalen)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(sum);
245 }
246
pn533_std_tx_frame_init(void * _frame,u8 cmd_code)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
pn533_std_tx_frame_finish(void * _frame)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(frame->datalen);
263
264 PN533_STD_FRAME_CHECKSUM(frame) =
265 pn533_std_data_checksum(frame->data, frame->datalen);
266
267 PN533_STD_FRAME_POSTAMBLE(frame) = 0;
268 }
269
pn533_std_tx_update_payload_len(void * _frame,int len)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
pn533_std_rx_frame_is_valid(void * _frame,struct pn533 * dev)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(stdf->datalen);
290 if (checksum != stdf->datalen_checksum)
291 return false;
292
293 checksum = pn533_std_data_checksum(stdf->data, 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(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
pn533_rx_frame_is_ack(void * _frame)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
pn533_std_rx_frame_size(void * frame)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
pn533_std_get_cmd_code(void * frame)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
pn533_rx_frame_is_cmd_response(struct pn533 * dev,void * frame)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
pn533_build_cmd_frame(struct pn533 * dev,u8 cmd_code,struct sk_buff * skb)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, ops->tx_header_len);
390 skb_put(skb, 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
pn533_send_async_complete(struct pn533 * dev)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(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(-EINTR);
423
424 if (!IS_ERR(resp)) {
425 skb_pull(resp, dev->ops->rx_header_len);
426 skb_trim(resp, 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(cmd);
433 dev->cmd = NULL;
434 return rc;
435 }
436
__pn533_send_async(struct pn533 * dev,u8 cmd_code,struct sk_buff * req,pn533_send_async_complete_t complete_cb,void * complete_cb_context)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(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, 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(&cmd->queue);
476 list_add_tail(&cmd->queue, &dev->cmd_queue);
477
478 goto unlock;
479
480 error:
481 kfree(cmd);
482 unlock:
483 mutex_unlock(&dev->cmd_lock);
484 return rc;
485 }
486
pn533_send_data_async(struct pn533 * dev,u8 cmd_code,struct sk_buff * req,pn533_send_async_complete_t complete_cb,void * complete_cb_context)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
pn533_send_cmd_async(struct pn533 * dev,u8 cmd_code,struct sk_buff * req,pn533_send_async_complete_t complete_cb,void * complete_cb_context)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 */
pn533_send_cmd_direct_async(struct pn533 * dev,u8 cmd_code,struct sk_buff * req,pn533_send_async_complete_t complete_cb,void * complete_cb_context)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(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, 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(cmd);
537 }
538
539 return rc;
540 }
541
pn533_wq_cmd_complete(struct work_struct * work)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(dev->wq, &dev->cmd_work);
550 }
551
pn533_wq_cmd(struct work_struct * work)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(&dev->cmd_queue)) {
561 dev->cmd_pending = 0;
562 mutex_unlock(&dev->cmd_lock);
563 return;
564 }
565
566 cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
567
568 list_del(&cmd->queue);
569
570 mutex_unlock(&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(cmd);
578 return;
579 }
580
581 }
582
583 struct pn533_sync_cmd_response {
584 struct sk_buff *resp;
585 struct completion done;
586 };
587
pn533_send_sync_complete(struct pn533 * dev,void * _arg,struct sk_buff * resp)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 */
pn533_send_cmd_sync(struct pn533 * dev,u8 cmd_code,struct sk_buff * req)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(&arg.done);
623
624 rc = pn533_send_cmd_async(dev, cmd_code, req,
625 pn533_send_sync_complete, &arg);
626 if (rc) {
627 dev_kfree_skb(req);
628 return ERR_PTR(rc);
629 }
630
631 wait_for_completion(&arg.done);
632
633 return arg.resp;
634 }
635
pn533_alloc_skb(struct pn533 * dev,unsigned int size)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(dev->ops->tx_header_len +
641 size +
642 dev->ops->tx_tail_len, GFP_KERNEL);
643
644 if (skb)
645 skb_reserve(skb, 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
pn533_target_type_a_is_valid(struct pn533_target_type_a * type_a,int target_data_len)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
pn533_target_found_type_a(struct nfc_target * nfc_tgt,u8 * tgt_data,int tgt_data_len)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(tgt_type_a, 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
pn533_target_felica_is_valid(struct pn533_target_felica * felica,int target_data_len)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
pn533_target_found_felica(struct nfc_target * nfc_tgt,u8 * tgt_data,int tgt_data_len)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(tgt_felica, 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
pn533_target_jewel_is_valid(struct pn533_target_jewel * jewel,int target_data_len)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
pn533_target_found_jewel(struct nfc_target * nfc_tgt,u8 * tgt_data,int tgt_data_len)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(tgt_jewel, 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
pn533_target_type_b_is_valid(struct pn533_target_type_b * type_b,int target_data_len)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
pn533_target_found_type_b(struct nfc_target * nfc_tgt,u8 * tgt_data,int tgt_data_len)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(tgt_type_b, 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);
pn533_target_found(struct pn533 * dev,u8 tg,u8 * tgdata,int tgdata_len)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, tgdata, 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, tgdata, tgdata_len);
913 break;
914 case PN533_POLL_MOD_106KBPS_JEWEL:
915 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
916 break;
917 case PN533_POLL_MOD_847KBPS_B:
918 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, 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->nfc_dev, &nfc_tgt, 1);
943
944 return 0;
945 }
946
pn533_poll_next_mod(struct pn533 * dev)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
pn533_poll_reset_mod_list(struct pn533 * dev)952 static void pn533_poll_reset_mod_list(struct pn533 *dev)
953 {
954 dev->poll_mod_count = 0;
955 }
956
pn533_poll_add_mod(struct pn533 * dev,u8 mod_index)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
pn533_poll_create_mod_list(struct pn533 * dev,u32 im_protocols,u32 tm_protocols)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, 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, PN533_POLL_MOD_212KBPS_FELICA);
977 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
978 }
979
980 if (im_protocols & NFC_PROTO_JEWEL_MASK)
981 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
982
983 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
984 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
985
986 if (tm_protocols)
987 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
988 }
989
pn533_start_poll_complete(struct pn533 * dev,struct sk_buff * resp)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
pn533_alloc_poll_tg_frame(struct pn533 * dev)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, 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, mifare_params, 6);
1048
1049 /* Felica params */
1050 felica = skb_put_data(skb, felica_params, 18);
1051 get_random_bytes(felica + 2, 6);
1052
1053 /* NFCID3 */
1054 nfcid3 = skb_put_zero(skb, 10);
1055 memcpy(nfcid3, felica, 8);
1056
1057 /* General bytes */
1058 skb_put_u8(skb, gbytes_len);
1059
1060 skb_put_data(skb, gbytes, gbytes_len);
1061
1062 /* Len Tk */
1063 skb_put_u8(skb, 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
pn533_tm_get_data_complete(struct pn533 * dev,void * arg,struct sk_buff * resp)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(resp)) {
1079 skb_queue_purge(&dev->resp_q);
1080 return PTR_ERR(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(resp, sizeof(status));
1089
1090 if (ret != PN533_CMD_RET_SUCCESS) {
1091 rc = -EIO;
1092 goto error;
1093 }
1094
1095 skb_queue_tail(&dev->resp_q, resp);
1096
1097 if (mi) {
1098 queue_work(dev->wq, &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->nfc_dev, skb);
1109
1110 error:
1111 nfc_tm_deactivated(dev->nfc_dev);
1112 dev->tgt_mode = 0;
1113 skb_queue_purge(&dev->resp_q);
1114 dev_kfree_skb(resp);
1115
1116 return rc;
1117 }
1118
pn533_wq_tm_mi_recv(struct work_struct * work)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, 0);
1126 if (!skb)
1127 return;
1128
1129 rc = pn533_send_cmd_direct_async(dev,
1130 PN533_CMD_TG_GET_DATA,
1131 skb,
1132 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);
pn533_wq_tm_mi_send(struct work_struct * work)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(&dev->fragment_skb);
1149 if (skb == NULL) { /* No more data */
1150 /* Reset the queue for future use */
1151 skb_queue_head_init(&dev->fragment_skb);
1152 goto error;
1153 }
1154
1155 /* last entry - remove MI bit */
1156 if (skb_queue_len(&dev->fragment_skb) == 0) {
1157 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_TG_SET_DATA,
1158 skb, pn533_tm_send_complete, NULL);
1159 } else
1160 rc = pn533_send_cmd_direct_async(dev,
1161 PN533_CMD_TG_SET_META_DATA,
1162 skb, 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(dev->wq, &dev->cmd_work);
1175 }
1176
pn533_wq_tg_get_data(struct work_struct * work)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, 0);
1184 if (!skb)
1185 return;
1186
1187 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1188 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
pn533_init_target_complete(struct pn533 * dev,struct sk_buff * resp)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->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(dev->wq, &dev->tg_work);
1230
1231 return 0;
1232 }
1233
pn533_listen_mode_timer(struct timer_list * t)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(dev->wq, &dev->poll_work,
1243 msecs_to_jiffies(PN533_POLL_INTERVAL));
1244 }
1245
pn533_rf_complete(struct pn533 * dev,void * arg,struct sk_buff * resp)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(resp)) {
1252 rc = PTR_ERR(resp);
1253
1254 nfc_err(dev->dev, "RF setting error %d\n", rc);
1255
1256 return rc;
1257 }
1258
1259 queue_delayed_work(dev->wq, &dev->poll_work,
1260 msecs_to_jiffies(PN533_POLL_INTERVAL));
1261
1262 dev_kfree_skb(resp);
1263 return rc;
1264 }
1265
pn533_wq_rf(struct work_struct * work)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, 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, skb,
1280 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
pn533_poll_dep_complete(struct pn533 * dev,void * arg,struct sk_buff * resp)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(resp))
1296 return PTR_ERR(resp);
1297
1298 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1299
1300 rc = rsp->status & PN533_CMD_RET_MASK;
1301 if (rc != PN533_CMD_RET_SUCCESS) {
1302 /* Not target found, turn radio off */
1303 queue_work(dev->wq, &dev->rf_work);
1304
1305 dev_kfree_skb(resp);
1306 return 0;
1307 }
1308
1309 dev_dbg(dev->dev, "Creating new target");
1310
1311 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1312 nfc_target.nfcid1_len = 10;
1313 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
1314 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1315 if (rc)
1316 goto error;
1317
1318 dev->tgt_available_prots = 0;
1319 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1320
1321 /* ATR_RES general bytes are located at offset 17 */
1322 target_gt_len = resp->len - 17;
1323 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1324 rsp->gt, target_gt_len);
1325 if (!rc) {
1326 rc = nfc_dep_link_is_up(dev->nfc_dev,
1327 dev->nfc_dev->targets[0].idx,
1328 0, NFC_RF_INITIATOR);
1329
1330 if (!rc)
1331 pn533_poll_reset_mod_list(dev);
1332 }
1333 error:
1334 dev_kfree_skb(resp);
1335 return rc;
1336 }
1337
1338 #define PASSIVE_DATA_LEN 5
pn533_poll_dep(struct nfc_dev * nfc_dev)1339 static int pn533_poll_dep(struct nfc_dev *nfc_dev)
1340 {
1341 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1342 struct sk_buff *skb;
1343 int rc, skb_len;
1344 u8 *next, nfcid3[NFC_NFCID3_MAXSIZE];
1345 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
1346
1347 if (!dev->gb) {
1348 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1349
1350 if (!dev->gb || !dev->gb_len) {
1351 dev->poll_dep = 0;
1352 queue_work(dev->wq, &dev->rf_work);
1353 }
1354 }
1355
1356 skb_len = 3 + dev->gb_len; /* ActPass + BR + Next */
1357 skb_len += PASSIVE_DATA_LEN;
1358
1359 /* NFCID3 */
1360 skb_len += NFC_NFCID3_MAXSIZE;
1361 nfcid3[0] = 0x1;
1362 nfcid3[1] = 0xfe;
1363 get_random_bytes(nfcid3 + 2, 6);
1364
1365 skb = pn533_alloc_skb(dev, skb_len);
1366 if (!skb)
1367 return -ENOMEM;
1368
1369 skb_put_u8(skb, 0x01); /* Active */
1370 skb_put_u8(skb, 0x02); /* 424 kbps */
1371
1372 next = skb_put(skb, 1); /* Next */
1373 *next = 0;
1374
1375 /* Copy passive data */
1376 skb_put_data(skb, passive_data, PASSIVE_DATA_LEN);
1377 *next |= 1;
1378
1379 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
1380 skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE);
1381 *next |= 2;
1382
1383 skb_put_data(skb, dev->gb, dev->gb_len);
1384 *next |= 4; /* We have some Gi */
1385
1386 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
1387 pn533_poll_dep_complete, NULL);
1388
1389 if (rc < 0)
1390 dev_kfree_skb(skb);
1391
1392 return rc;
1393 }
1394
pn533_autopoll_complete(struct pn533 * dev,void * arg,struct sk_buff * resp)1395 static int pn533_autopoll_complete(struct pn533 *dev, void *arg,
1396 struct sk_buff *resp)
1397 {
1398 struct pn532_autopoll_resp *apr;
1399 struct nfc_target nfc_tgt;
1400 u8 nbtg;
1401 int rc;
1402
1403 if (IS_ERR(resp)) {
1404 rc = PTR_ERR(resp);
1405
1406 nfc_err(dev->dev, "%s autopoll complete error %d\n",
1407 __func__, rc);
1408
1409 if (rc == -ENOENT) {
1410 if (dev->poll_mod_count != 0)
1411 return rc;
1412 goto stop_poll;
1413 } else if (rc < 0) {
1414 nfc_err(dev->dev,
1415 "Error %d when running autopoll\n", rc);
1416 goto stop_poll;
1417 }
1418 }
1419
1420 nbtg = resp->data[0];
1421 if ((nbtg > 2) || (nbtg <= 0))
1422 return -EAGAIN;
1423
1424 apr = (struct pn532_autopoll_resp *)&resp->data[1];
1425 while (nbtg--) {
1426 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1427 switch (apr->type) {
1428 case PN532_AUTOPOLL_TYPE_ISOA:
1429 dev_dbg(dev->dev, "ISOA\n");
1430 rc = pn533_target_found_type_a(&nfc_tgt, apr->tgdata,
1431 apr->ln - 1);
1432 break;
1433 case PN532_AUTOPOLL_TYPE_FELICA212:
1434 case PN532_AUTOPOLL_TYPE_FELICA424:
1435 dev_dbg(dev->dev, "FELICA\n");
1436 rc = pn533_target_found_felica(&nfc_tgt, apr->tgdata,
1437 apr->ln - 1);
1438 break;
1439 case PN532_AUTOPOLL_TYPE_JEWEL:
1440 dev_dbg(dev->dev, "JEWEL\n");
1441 rc = pn533_target_found_jewel(&nfc_tgt, apr->tgdata,
1442 apr->ln - 1);
1443 break;
1444 case PN532_AUTOPOLL_TYPE_ISOB:
1445 dev_dbg(dev->dev, "ISOB\n");
1446 rc = pn533_target_found_type_b(&nfc_tgt, apr->tgdata,
1447 apr->ln - 1);
1448 break;
1449 case PN532_AUTOPOLL_TYPE_MIFARE:
1450 dev_dbg(dev->dev, "Mifare\n");
1451 rc = pn533_target_found_type_a(&nfc_tgt, apr->tgdata,
1452 apr->ln - 1);
1453 break;
1454 default:
1455 nfc_err(dev->dev,
1456 "Unknown current poll modulation\n");
1457 rc = -EPROTO;
1458 }
1459
1460 if (rc)
1461 goto done;
1462
1463 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
1464 nfc_err(dev->dev,
1465 "The Tg found doesn't have the desired protocol\n");
1466 rc = -EAGAIN;
1467 goto done;
1468 }
1469
1470 dev->tgt_available_prots = nfc_tgt.supported_protocols;
1471 apr = (struct pn532_autopoll_resp *)
1472 (apr->tgdata + (apr->ln - 1));
1473 }
1474
1475 pn533_poll_reset_mod_list(dev);
1476 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1477
1478 done:
1479 dev_kfree_skb(resp);
1480 return rc;
1481
1482 stop_poll:
1483 nfc_err(dev->dev, "autopoll operation has been stopped\n");
1484
1485 pn533_poll_reset_mod_list(dev);
1486 dev->poll_protocols = 0;
1487 return rc;
1488 }
1489
pn533_poll_complete(struct pn533 * dev,void * arg,struct sk_buff * resp)1490 static int pn533_poll_complete(struct pn533 *dev, void *arg,
1491 struct sk_buff *resp)
1492 {
1493 struct pn533_poll_modulations *cur_mod;
1494 int rc;
1495
1496 if (IS_ERR(resp)) {
1497 rc = PTR_ERR(resp);
1498
1499 nfc_err(dev->dev, "%s Poll complete error %d\n",
1500 __func__, rc);
1501
1502 if (rc == -ENOENT) {
1503 if (dev->poll_mod_count != 0)
1504 return rc;
1505 goto stop_poll;
1506 } else if (rc < 0) {
1507 nfc_err(dev->dev,
1508 "Error %d when running poll\n", rc);
1509 goto stop_poll;
1510 }
1511 }
1512
1513 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1514
1515 if (cur_mod->len == 0) { /* Target mode */
1516 del_timer(&dev->listen_timer);
1517 rc = pn533_init_target_complete(dev, resp);
1518 goto done;
1519 }
1520
1521 /* Initiator mode */
1522 rc = pn533_start_poll_complete(dev, resp);
1523 if (!rc)
1524 goto done;
1525
1526 if (!dev->poll_mod_count) {
1527 dev_dbg(dev->dev, "Polling has been stopped\n");
1528 goto done;
1529 }
1530
1531 pn533_poll_next_mod(dev);
1532 /* Not target found, turn radio off */
1533 queue_work(dev->wq, &dev->rf_work);
1534
1535 done:
1536 dev_kfree_skb(resp);
1537 return rc;
1538
1539 stop_poll:
1540 nfc_err(dev->dev, "Polling operation has been stopped\n");
1541
1542 pn533_poll_reset_mod_list(dev);
1543 dev->poll_protocols = 0;
1544 return rc;
1545 }
1546
pn533_alloc_poll_in_frame(struct pn533 * dev,struct pn533_poll_modulations * mod)1547 static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1548 struct pn533_poll_modulations *mod)
1549 {
1550 struct sk_buff *skb;
1551
1552 skb = pn533_alloc_skb(dev, mod->len);
1553 if (!skb)
1554 return NULL;
1555
1556 skb_put_data(skb, &mod->data, mod->len);
1557
1558 return skb;
1559 }
1560
pn533_send_poll_frame(struct pn533 * dev)1561 static int pn533_send_poll_frame(struct pn533 *dev)
1562 {
1563 struct pn533_poll_modulations *mod;
1564 struct sk_buff *skb;
1565 int rc;
1566 u8 cmd_code;
1567
1568 mod = dev->poll_mod_active[dev->poll_mod_curr];
1569
1570 dev_dbg(dev->dev, "%s mod len %d\n",
1571 __func__, mod->len);
1572
1573 if ((dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK) && dev->poll_dep) {
1574 dev->poll_dep = 0;
1575 return pn533_poll_dep(dev->nfc_dev);
1576 }
1577
1578 if (mod->len == 0) { /* Listen mode */
1579 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
1580 skb = pn533_alloc_poll_tg_frame(dev);
1581 } else { /* Polling mode */
1582 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
1583 skb = pn533_alloc_poll_in_frame(dev, mod);
1584 }
1585
1586 if (!skb) {
1587 nfc_err(dev->dev, "Failed to allocate skb\n");
1588 return -ENOMEM;
1589 }
1590
1591 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1592 NULL);
1593 if (rc < 0) {
1594 dev_kfree_skb(skb);
1595 nfc_err(dev->dev, "Polling loop error %d\n", rc);
1596 }
1597
1598 return rc;
1599 }
1600
pn533_wq_poll(struct work_struct * work)1601 static void pn533_wq_poll(struct work_struct *work)
1602 {
1603 struct pn533 *dev = container_of(work, struct pn533, poll_work.work);
1604 struct pn533_poll_modulations *cur_mod;
1605 int rc;
1606
1607 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1608
1609 dev_dbg(dev->dev,
1610 "%s cancel_listen %d modulation len %d\n",
1611 __func__, dev->cancel_listen, cur_mod->len);
1612
1613 if (dev->cancel_listen == 1) {
1614 dev->cancel_listen = 0;
1615 dev->phy_ops->abort_cmd(dev, GFP_ATOMIC);
1616 }
1617
1618 rc = pn533_send_poll_frame(dev);
1619 if (rc)
1620 return;
1621
1622 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1623 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1624 }
1625
pn533_start_poll(struct nfc_dev * nfc_dev,u32 im_protocols,u32 tm_protocols)1626 static int pn533_start_poll(struct nfc_dev *nfc_dev,
1627 u32 im_protocols, u32 tm_protocols)
1628 {
1629 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1630 struct pn533_poll_modulations *cur_mod;
1631 struct sk_buff *skb;
1632 u8 rand_mod;
1633 int rc;
1634
1635 dev_dbg(dev->dev,
1636 "%s: im protocols 0x%x tm protocols 0x%x\n",
1637 __func__, im_protocols, tm_protocols);
1638
1639 if (dev->tgt_active_prot) {
1640 nfc_err(dev->dev,
1641 "Cannot poll with a target already activated\n");
1642 return -EBUSY;
1643 }
1644
1645 if (dev->tgt_mode) {
1646 nfc_err(dev->dev,
1647 "Cannot poll while already being activated\n");
1648 return -EBUSY;
1649 }
1650
1651 if (tm_protocols) {
1652 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1653 if (dev->gb == NULL)
1654 tm_protocols = 0;
1655 }
1656
1657 dev->poll_protocols = im_protocols;
1658 dev->listen_protocols = tm_protocols;
1659 if (dev->device_type == PN533_DEVICE_PN532_AUTOPOLL) {
1660 skb = pn533_alloc_skb(dev, 4 + 6);
1661 if (!skb)
1662 return -ENOMEM;
1663
1664 *((u8 *)skb_put(skb, sizeof(u8))) =
1665 PN532_AUTOPOLL_POLLNR_INFINITE;
1666 *((u8 *)skb_put(skb, sizeof(u8))) = PN532_AUTOPOLL_PERIOD;
1667
1668 if ((im_protocols & NFC_PROTO_MIFARE_MASK) &&
1669 (im_protocols & NFC_PROTO_ISO14443_MASK) &&
1670 (im_protocols & NFC_PROTO_NFC_DEP_MASK))
1671 *((u8 *)skb_put(skb, sizeof(u8))) =
1672 PN532_AUTOPOLL_TYPE_GENERIC_106;
1673 else {
1674 if (im_protocols & NFC_PROTO_MIFARE_MASK)
1675 *((u8 *)skb_put(skb, sizeof(u8))) =
1676 PN532_AUTOPOLL_TYPE_MIFARE;
1677
1678 if (im_protocols & NFC_PROTO_ISO14443_MASK)
1679 *((u8 *)skb_put(skb, sizeof(u8))) =
1680 PN532_AUTOPOLL_TYPE_ISOA;
1681
1682 if (im_protocols & NFC_PROTO_NFC_DEP_MASK) {
1683 *((u8 *)skb_put(skb, sizeof(u8))) =
1684 PN532_AUTOPOLL_TYPE_DEP_PASSIVE_106;
1685 *((u8 *)skb_put(skb, sizeof(u8))) =
1686 PN532_AUTOPOLL_TYPE_DEP_PASSIVE_212;
1687 *((u8 *)skb_put(skb, sizeof(u8))) =
1688 PN532_AUTOPOLL_TYPE_DEP_PASSIVE_424;
1689 }
1690 }
1691
1692 if (im_protocols & NFC_PROTO_FELICA_MASK ||
1693 im_protocols & NFC_PROTO_NFC_DEP_MASK) {
1694 *((u8 *)skb_put(skb, sizeof(u8))) =
1695 PN532_AUTOPOLL_TYPE_FELICA212;
1696 *((u8 *)skb_put(skb, sizeof(u8))) =
1697 PN532_AUTOPOLL_TYPE_FELICA424;
1698 }
1699
1700 if (im_protocols & NFC_PROTO_JEWEL_MASK)
1701 *((u8 *)skb_put(skb, sizeof(u8))) =
1702 PN532_AUTOPOLL_TYPE_JEWEL;
1703
1704 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
1705 *((u8 *)skb_put(skb, sizeof(u8))) =
1706 PN532_AUTOPOLL_TYPE_ISOB;
1707
1708 if (tm_protocols)
1709 *((u8 *)skb_put(skb, sizeof(u8))) =
1710 PN532_AUTOPOLL_TYPE_DEP_ACTIVE_106;
1711
1712 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_AUTOPOLL, skb,
1713 pn533_autopoll_complete, NULL);
1714
1715 if (rc < 0)
1716 dev_kfree_skb(skb);
1717 else
1718 dev->poll_mod_count++;
1719
1720 return rc;
1721 }
1722
1723 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1724
1725 /* Do not always start polling from the same modulation */
1726 get_random_bytes(&rand_mod, sizeof(rand_mod));
1727 rand_mod %= dev->poll_mod_count;
1728 dev->poll_mod_curr = rand_mod;
1729
1730 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1731
1732 rc = pn533_send_poll_frame(dev);
1733
1734 /* Start listen timer */
1735 if (!rc && cur_mod->len == 0 && dev->poll_mod_count > 1)
1736 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1737
1738 return rc;
1739 }
1740
pn533_stop_poll(struct nfc_dev * nfc_dev)1741 static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1742 {
1743 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1744
1745 del_timer(&dev->listen_timer);
1746
1747 if (!dev->poll_mod_count) {
1748 dev_dbg(dev->dev,
1749 "Polling operation was not running\n");
1750 return;
1751 }
1752
1753 dev->phy_ops->abort_cmd(dev, GFP_KERNEL);
1754 flush_delayed_work(&dev->poll_work);
1755 pn533_poll_reset_mod_list(dev);
1756 }
1757
pn533_activate_target_nfcdep(struct pn533 * dev)1758 static int pn533_activate_target_nfcdep(struct pn533 *dev)
1759 {
1760 struct pn533_cmd_activate_response *rsp;
1761 u16 gt_len;
1762 int rc;
1763 struct sk_buff *skb;
1764 struct sk_buff *resp;
1765
1766 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
1767 if (!skb)
1768 return -ENOMEM;
1769
1770 skb_put_u8(skb, 1); /* TG */
1771 skb_put_u8(skb, 0); /* Next */
1772
1773 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1774 if (IS_ERR(resp))
1775 return PTR_ERR(resp);
1776
1777 rsp = (struct pn533_cmd_activate_response *)resp->data;
1778 rc = rsp->status & PN533_CMD_RET_MASK;
1779 if (rc != PN533_CMD_RET_SUCCESS) {
1780 nfc_err(dev->dev,
1781 "Target activation failed (error 0x%x)\n", rc);
1782 dev_kfree_skb(resp);
1783 return -EIO;
1784 }
1785
1786 /* ATR_RES general bytes are located at offset 16 */
1787 gt_len = resp->len - 16;
1788 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
1789
1790 dev_kfree_skb(resp);
1791 return rc;
1792 }
1793
pn533_activate_target(struct nfc_dev * nfc_dev,struct nfc_target * target,u32 protocol)1794 static int pn533_activate_target(struct nfc_dev *nfc_dev,
1795 struct nfc_target *target, u32 protocol)
1796 {
1797 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1798 int rc;
1799
1800 dev_dbg(dev->dev, "%s: protocol=%u\n", __func__, protocol);
1801
1802 if (dev->poll_mod_count) {
1803 nfc_err(dev->dev,
1804 "Cannot activate while polling\n");
1805 return -EBUSY;
1806 }
1807
1808 if (dev->tgt_active_prot) {
1809 nfc_err(dev->dev,
1810 "There is already an active target\n");
1811 return -EBUSY;
1812 }
1813
1814 if (!dev->tgt_available_prots) {
1815 nfc_err(dev->dev,
1816 "There is no available target to activate\n");
1817 return -EINVAL;
1818 }
1819
1820 if (!(dev->tgt_available_prots & (1 << protocol))) {
1821 nfc_err(dev->dev,
1822 "Target doesn't support requested proto %u\n",
1823 protocol);
1824 return -EINVAL;
1825 }
1826
1827 if (protocol == NFC_PROTO_NFC_DEP) {
1828 rc = pn533_activate_target_nfcdep(dev);
1829 if (rc) {
1830 nfc_err(dev->dev,
1831 "Activating target with DEP failed %d\n", rc);
1832 return rc;
1833 }
1834 }
1835
1836 dev->tgt_active_prot = protocol;
1837 dev->tgt_available_prots = 0;
1838
1839 return 0;
1840 }
1841
pn533_deactivate_target_complete(struct pn533 * dev,void * arg,struct sk_buff * resp)1842 static int pn533_deactivate_target_complete(struct pn533 *dev, void *arg,
1843 struct sk_buff *resp)
1844 {
1845 int rc = 0;
1846
1847 if (IS_ERR(resp)) {
1848 rc = PTR_ERR(resp);
1849
1850 nfc_err(dev->dev, "Target release error %d\n", rc);
1851
1852 return rc;
1853 }
1854
1855 rc = resp->data[0] & PN533_CMD_RET_MASK;
1856 if (rc != PN533_CMD_RET_SUCCESS)
1857 nfc_err(dev->dev,
1858 "Error 0x%x when releasing the target\n", rc);
1859
1860 dev_kfree_skb(resp);
1861 return rc;
1862 }
1863
pn533_deactivate_target(struct nfc_dev * nfc_dev,struct nfc_target * target,u8 mode)1864 static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1865 struct nfc_target *target, u8 mode)
1866 {
1867 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1868 struct sk_buff *skb;
1869 int rc;
1870
1871 if (!dev->tgt_active_prot) {
1872 nfc_err(dev->dev, "There is no active target\n");
1873 return;
1874 }
1875
1876 dev->tgt_active_prot = 0;
1877 skb_queue_purge(&dev->resp_q);
1878
1879 skb = pn533_alloc_skb(dev, sizeof(u8));
1880 if (!skb)
1881 return;
1882
1883 skb_put_u8(skb, 1); /* TG*/
1884
1885 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_RELEASE, skb,
1886 pn533_deactivate_target_complete, NULL);
1887 if (rc < 0) {
1888 dev_kfree_skb(skb);
1889 nfc_err(dev->dev, "Target release error %d\n", rc);
1890 }
1891 }
1892
1893
pn533_in_dep_link_up_complete(struct pn533 * dev,void * arg,struct sk_buff * resp)1894 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
1895 struct sk_buff *resp)
1896 {
1897 struct pn533_cmd_jump_dep_response *rsp;
1898 u8 target_gt_len;
1899 int rc;
1900 u8 active = *(u8 *)arg;
1901
1902 kfree(arg);
1903
1904 if (IS_ERR(resp))
1905 return PTR_ERR(resp);
1906
1907 if (dev->tgt_available_prots &&
1908 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1909 nfc_err(dev->dev,
1910 "The target does not support DEP\n");
1911 rc = -EINVAL;
1912 goto error;
1913 }
1914
1915 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1916
1917 rc = rsp->status & PN533_CMD_RET_MASK;
1918 if (rc != PN533_CMD_RET_SUCCESS) {
1919 nfc_err(dev->dev,
1920 "Bringing DEP link up failed (error 0x%x)\n", rc);
1921 goto error;
1922 }
1923
1924 if (!dev->tgt_available_prots) {
1925 struct nfc_target nfc_target;
1926
1927 dev_dbg(dev->dev, "Creating new target\n");
1928
1929 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1930 nfc_target.nfcid1_len = 10;
1931 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
1932 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1933 if (rc)
1934 goto error;
1935
1936 dev->tgt_available_prots = 0;
1937 }
1938
1939 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1940
1941 /* ATR_RES general bytes are located at offset 17 */
1942 target_gt_len = resp->len - 17;
1943 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1944 rsp->gt, target_gt_len);
1945 if (rc == 0)
1946 rc = nfc_dep_link_is_up(dev->nfc_dev,
1947 dev->nfc_dev->targets[0].idx,
1948 !active, NFC_RF_INITIATOR);
1949
1950 error:
1951 dev_kfree_skb(resp);
1952 return rc;
1953 }
1954
1955 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf);
pn533_dep_link_up(struct nfc_dev * nfc_dev,struct nfc_target * target,u8 comm_mode,u8 * gb,size_t gb_len)1956 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
1957 u8 comm_mode, u8 *gb, size_t gb_len)
1958 {
1959 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1960 struct sk_buff *skb;
1961 int rc, skb_len;
1962 u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE];
1963 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
1964
1965 if (dev->poll_mod_count) {
1966 nfc_err(dev->dev,
1967 "Cannot bring the DEP link up while polling\n");
1968 return -EBUSY;
1969 }
1970
1971 if (dev->tgt_active_prot) {
1972 nfc_err(dev->dev,
1973 "There is already an active target\n");
1974 return -EBUSY;
1975 }
1976
1977 skb_len = 3 + gb_len; /* ActPass + BR + Next */
1978 skb_len += PASSIVE_DATA_LEN;
1979
1980 /* NFCID3 */
1981 skb_len += NFC_NFCID3_MAXSIZE;
1982 if (target && !target->nfcid2_len) {
1983 nfcid3[0] = 0x1;
1984 nfcid3[1] = 0xfe;
1985 get_random_bytes(nfcid3 + 2, 6);
1986 }
1987
1988 skb = pn533_alloc_skb(dev, skb_len);
1989 if (!skb)
1990 return -ENOMEM;
1991
1992 skb_put_u8(skb, !comm_mode); /* ActPass */
1993 skb_put_u8(skb, 0x02); /* 424 kbps */
1994
1995 next = skb_put(skb, 1); /* Next */
1996 *next = 0;
1997
1998 /* Copy passive data */
1999 skb_put_data(skb, passive_data, PASSIVE_DATA_LEN);
2000 *next |= 1;
2001
2002 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
2003 if (target && target->nfcid2_len)
2004 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2,
2005 target->nfcid2_len);
2006 else
2007 skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE);
2008 *next |= 2;
2009
2010 if (gb != NULL && gb_len > 0) {
2011 skb_put_data(skb, gb, gb_len);
2012 *next |= 4; /* We have some Gi */
2013 } else {
2014 *next = 0;
2015 }
2016
2017 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2018 if (!arg) {
2019 dev_kfree_skb(skb);
2020 return -ENOMEM;
2021 }
2022
2023 *arg = !comm_mode;
2024
2025 pn533_rf_field(dev->nfc_dev, 0);
2026
2027 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
2028 pn533_in_dep_link_up_complete, arg);
2029
2030 if (rc < 0) {
2031 dev_kfree_skb(skb);
2032 kfree(arg);
2033 }
2034
2035 return rc;
2036 }
2037
pn533_dep_link_down(struct nfc_dev * nfc_dev)2038 static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
2039 {
2040 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2041
2042 pn533_poll_reset_mod_list(dev);
2043
2044 if (dev->tgt_mode || dev->tgt_active_prot)
2045 dev->phy_ops->abort_cmd(dev, GFP_KERNEL);
2046
2047 dev->tgt_active_prot = 0;
2048 dev->tgt_mode = 0;
2049
2050 skb_queue_purge(&dev->resp_q);
2051
2052 return 0;
2053 }
2054
2055 struct pn533_data_exchange_arg {
2056 data_exchange_cb_t cb;
2057 void *cb_context;
2058 };
2059
pn533_build_response(struct pn533 * dev)2060 static struct sk_buff *pn533_build_response(struct pn533 *dev)
2061 {
2062 struct sk_buff *skb, *tmp, *t;
2063 unsigned int skb_len = 0, tmp_len = 0;
2064
2065 if (skb_queue_empty(&dev->resp_q))
2066 return NULL;
2067
2068 if (skb_queue_len(&dev->resp_q) == 1) {
2069 skb = skb_dequeue(&dev->resp_q);
2070 goto out;
2071 }
2072
2073 skb_queue_walk_safe(&dev->resp_q, tmp, t)
2074 skb_len += tmp->len;
2075
2076 dev_dbg(dev->dev, "%s total length %d\n",
2077 __func__, skb_len);
2078
2079 skb = alloc_skb(skb_len, GFP_KERNEL);
2080 if (skb == NULL)
2081 goto out;
2082
2083 skb_put(skb, skb_len);
2084
2085 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2086 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2087 tmp_len += tmp->len;
2088 }
2089
2090 out:
2091 skb_queue_purge(&dev->resp_q);
2092
2093 return skb;
2094 }
2095
pn533_data_exchange_complete(struct pn533 * dev,void * _arg,struct sk_buff * resp)2096 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
2097 struct sk_buff *resp)
2098 {
2099 struct pn533_data_exchange_arg *arg = _arg;
2100 struct sk_buff *skb;
2101 int rc = 0;
2102 u8 status, ret, mi;
2103
2104 if (IS_ERR(resp)) {
2105 rc = PTR_ERR(resp);
2106 goto _error;
2107 }
2108
2109 status = resp->data[0];
2110 ret = status & PN533_CMD_RET_MASK;
2111 mi = status & PN533_CMD_MI_MASK;
2112
2113 skb_pull(resp, sizeof(status));
2114
2115 if (ret != PN533_CMD_RET_SUCCESS) {
2116 nfc_err(dev->dev,
2117 "Exchanging data failed (error 0x%x)\n", ret);
2118 rc = -EIO;
2119 goto error;
2120 }
2121
2122 skb_queue_tail(&dev->resp_q, resp);
2123
2124 if (mi) {
2125 dev->cmd_complete_mi_arg = arg;
2126 queue_work(dev->wq, &dev->mi_rx_work);
2127 return -EINPROGRESS;
2128 }
2129
2130 /* Prepare for the next round */
2131 if (skb_queue_len(&dev->fragment_skb) > 0) {
2132 dev->cmd_complete_dep_arg = arg;
2133 queue_work(dev->wq, &dev->mi_tx_work);
2134
2135 return -EINPROGRESS;
2136 }
2137
2138 skb = pn533_build_response(dev);
2139 if (!skb) {
2140 rc = -ENOMEM;
2141 goto error;
2142 }
2143
2144 arg->cb(arg->cb_context, skb, 0);
2145 kfree(arg);
2146 return 0;
2147
2148 error:
2149 dev_kfree_skb(resp);
2150 _error:
2151 skb_queue_purge(&dev->resp_q);
2152 arg->cb(arg->cb_context, NULL, rc);
2153 kfree(arg);
2154 return rc;
2155 }
2156
2157 /*
2158 * Receive an incoming pn533 frame. skb contains only header and payload.
2159 * If skb == NULL, it is a notification that the link below is dead.
2160 */
pn533_recv_frame(struct pn533 * dev,struct sk_buff * skb,int status)2161 void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status)
2162 {
2163 if (!dev->cmd)
2164 goto sched_wq;
2165
2166 dev->cmd->status = status;
2167
2168 if (status != 0) {
2169 dev_dbg(dev->dev, "%s: Error received: %d\n", __func__, status);
2170 goto sched_wq;
2171 }
2172
2173 if (skb == NULL) {
2174 dev_err(dev->dev, "NULL Frame -> link is dead\n");
2175 goto sched_wq;
2176 }
2177
2178 if (pn533_rx_frame_is_ack(skb->data)) {
2179 dev_dbg(dev->dev, "%s: Received ACK frame\n", __func__);
2180 dev_kfree_skb(skb);
2181 return;
2182 }
2183
2184 print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, skb->data,
2185 dev->ops->rx_frame_size(skb->data), false);
2186
2187 if (!dev->ops->rx_is_frame_valid(skb->data, dev)) {
2188 nfc_err(dev->dev, "Received an invalid frame\n");
2189 dev->cmd->status = -EIO;
2190 } else if (!pn533_rx_frame_is_cmd_response(dev, skb->data)) {
2191 nfc_err(dev->dev, "It it not the response to the last command\n");
2192 dev->cmd->status = -EIO;
2193 }
2194
2195 dev->cmd->resp = skb;
2196
2197 sched_wq:
2198 queue_work(dev->wq, &dev->cmd_complete_work);
2199 }
2200 EXPORT_SYMBOL(pn533_recv_frame);
2201
2202 /* Split the Tx skb into small chunks */
pn533_fill_fragment_skbs(struct pn533 * dev,struct sk_buff * skb)2203 static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb)
2204 {
2205 struct sk_buff *frag;
2206 int frag_size;
2207
2208 do {
2209 /* Remaining size */
2210 if (skb->len > PN533_CMD_DATAFRAME_MAXLEN)
2211 frag_size = PN533_CMD_DATAFRAME_MAXLEN;
2212 else
2213 frag_size = skb->len;
2214
2215 /* Allocate and reserve */
2216 frag = pn533_alloc_skb(dev, frag_size);
2217 if (!frag) {
2218 skb_queue_purge(&dev->fragment_skb);
2219 return -ENOMEM;
2220 }
2221
2222 if (!dev->tgt_mode) {
2223 /* Reserve the TG/MI byte */
2224 skb_reserve(frag, 1);
2225
2226 /* MI + TG */
2227 if (frag_size == PN533_CMD_DATAFRAME_MAXLEN)
2228 *(u8 *)skb_push(frag, sizeof(u8)) =
2229 (PN533_CMD_MI_MASK | 1);
2230 else
2231 *(u8 *)skb_push(frag, sizeof(u8)) = 1; /* TG */
2232 }
2233
2234 skb_put_data(frag, skb->data, frag_size);
2235
2236 /* Reduce the size of incoming buffer */
2237 skb_pull(skb, frag_size);
2238
2239 /* Add this to skb_queue */
2240 skb_queue_tail(&dev->fragment_skb, frag);
2241
2242 } while (skb->len > 0);
2243
2244 dev_kfree_skb(skb);
2245
2246 return skb_queue_len(&dev->fragment_skb);
2247 }
2248
pn533_transceive(struct nfc_dev * nfc_dev,struct nfc_target * target,struct sk_buff * skb,data_exchange_cb_t cb,void * cb_context)2249 static int pn533_transceive(struct nfc_dev *nfc_dev,
2250 struct nfc_target *target, struct sk_buff *skb,
2251 data_exchange_cb_t cb, void *cb_context)
2252 {
2253 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2254 struct pn533_data_exchange_arg *arg = NULL;
2255 int rc;
2256
2257 if (!dev->tgt_active_prot) {
2258 nfc_err(dev->dev,
2259 "Can't exchange data if there is no active target\n");
2260 rc = -EINVAL;
2261 goto error;
2262 }
2263
2264 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2265 if (!arg) {
2266 rc = -ENOMEM;
2267 goto error;
2268 }
2269
2270 arg->cb = cb;
2271 arg->cb_context = cb_context;
2272
2273 switch (dev->device_type) {
2274 case PN533_DEVICE_PASORI:
2275 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2276 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2277 skb,
2278 pn533_data_exchange_complete,
2279 arg);
2280
2281 break;
2282 }
2283 fallthrough;
2284 default:
2285 /* jumbo frame ? */
2286 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2287 rc = pn533_fill_fragment_skbs(dev, skb);
2288 if (rc < 0)
2289 goto error;
2290
2291 skb = skb_dequeue(&dev->fragment_skb);
2292 if (!skb) {
2293 rc = -EIO;
2294 goto error;
2295 }
2296 } else {
2297 *(u8 *)skb_push(skb, sizeof(u8)) = 1; /* TG */
2298 }
2299
2300 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2301 skb, pn533_data_exchange_complete,
2302 arg);
2303
2304 break;
2305 }
2306
2307 if (rc < 0) /* rc from send_async */
2308 goto error;
2309
2310 return 0;
2311
2312 error:
2313 kfree(arg);
2314 dev_kfree_skb(skb);
2315 return rc;
2316 }
2317
pn533_tm_send_complete(struct pn533 * dev,void * arg,struct sk_buff * resp)2318 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
2319 struct sk_buff *resp)
2320 {
2321 u8 status;
2322
2323 if (IS_ERR(resp))
2324 return PTR_ERR(resp);
2325
2326 status = resp->data[0];
2327
2328 /* Prepare for the next round */
2329 if (skb_queue_len(&dev->fragment_skb) > 0) {
2330 queue_work(dev->wq, &dev->mi_tm_tx_work);
2331 return -EINPROGRESS;
2332 }
2333 dev_kfree_skb(resp);
2334
2335 if (status != 0) {
2336 nfc_tm_deactivated(dev->nfc_dev);
2337
2338 dev->tgt_mode = 0;
2339
2340 return 0;
2341 }
2342
2343 queue_work(dev->wq, &dev->tg_work);
2344
2345 return 0;
2346 }
2347
pn533_tm_send(struct nfc_dev * nfc_dev,struct sk_buff * skb)2348 static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2349 {
2350 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2351 int rc;
2352
2353 /* let's split in multiple chunks if size's too big */
2354 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2355 rc = pn533_fill_fragment_skbs(dev, skb);
2356 if (rc < 0)
2357 goto error;
2358
2359 /* get the first skb */
2360 skb = skb_dequeue(&dev->fragment_skb);
2361 if (!skb) {
2362 rc = -EIO;
2363 goto error;
2364 }
2365
2366 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_META_DATA, skb,
2367 pn533_tm_send_complete, NULL);
2368 } else {
2369 /* Send th skb */
2370 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2371 pn533_tm_send_complete, NULL);
2372 }
2373
2374 error:
2375 if (rc < 0) {
2376 dev_kfree_skb(skb);
2377 skb_queue_purge(&dev->fragment_skb);
2378 }
2379
2380 return rc;
2381 }
2382
pn533_wq_mi_recv(struct work_struct * work)2383 static void pn533_wq_mi_recv(struct work_struct *work)
2384 {
2385 struct pn533 *dev = container_of(work, struct pn533, mi_rx_work);
2386 struct sk_buff *skb;
2387 int rc;
2388
2389 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
2390 if (!skb)
2391 goto error;
2392
2393 switch (dev->device_type) {
2394 case PN533_DEVICE_PASORI:
2395 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2396 rc = pn533_send_cmd_direct_async(dev,
2397 PN533_CMD_IN_COMM_THRU,
2398 skb,
2399 pn533_data_exchange_complete,
2400 dev->cmd_complete_mi_arg);
2401
2402 break;
2403 }
2404 fallthrough;
2405 default:
2406 skb_put_u8(skb, 1); /*TG*/
2407
2408 rc = pn533_send_cmd_direct_async(dev,
2409 PN533_CMD_IN_DATA_EXCHANGE,
2410 skb,
2411 pn533_data_exchange_complete,
2412 dev->cmd_complete_mi_arg);
2413
2414 break;
2415 }
2416
2417 if (rc == 0) /* success */
2418 return;
2419
2420 nfc_err(dev->dev,
2421 "Error %d when trying to perform data_exchange\n", rc);
2422
2423 dev_kfree_skb(skb);
2424 kfree(dev->cmd_complete_mi_arg);
2425
2426 error:
2427 dev->phy_ops->send_ack(dev, GFP_KERNEL);
2428 queue_work(dev->wq, &dev->cmd_work);
2429 }
2430
pn533_wq_mi_send(struct work_struct * work)2431 static void pn533_wq_mi_send(struct work_struct *work)
2432 {
2433 struct pn533 *dev = container_of(work, struct pn533, mi_tx_work);
2434 struct sk_buff *skb;
2435 int rc;
2436
2437 /* Grab the first skb in the queue */
2438 skb = skb_dequeue(&dev->fragment_skb);
2439
2440 if (skb == NULL) { /* No more data */
2441 /* Reset the queue for future use */
2442 skb_queue_head_init(&dev->fragment_skb);
2443 goto error;
2444 }
2445
2446 switch (dev->device_type) {
2447 case PN533_DEVICE_PASORI:
2448 if (dev->tgt_active_prot != NFC_PROTO_FELICA) {
2449 rc = -EIO;
2450 break;
2451 }
2452
2453 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU,
2454 skb,
2455 pn533_data_exchange_complete,
2456 dev->cmd_complete_dep_arg);
2457
2458 break;
2459
2460 default:
2461 /* Still some fragments? */
2462 rc = pn533_send_cmd_direct_async(dev,
2463 PN533_CMD_IN_DATA_EXCHANGE,
2464 skb,
2465 pn533_data_exchange_complete,
2466 dev->cmd_complete_dep_arg);
2467
2468 break;
2469 }
2470
2471 if (rc == 0) /* success */
2472 return;
2473
2474 nfc_err(dev->dev,
2475 "Error %d when trying to perform data_exchange\n", rc);
2476
2477 dev_kfree_skb(skb);
2478 kfree(dev->cmd_complete_dep_arg);
2479
2480 error:
2481 dev->phy_ops->send_ack(dev, GFP_KERNEL);
2482 queue_work(dev->wq, &dev->cmd_work);
2483 }
2484
pn533_set_configuration(struct pn533 * dev,u8 cfgitem,u8 * cfgdata,u8 cfgdata_len)2485 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2486 u8 cfgdata_len)
2487 {
2488 struct sk_buff *skb;
2489 struct sk_buff *resp;
2490 int skb_len;
2491
2492 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
2493
2494 skb = pn533_alloc_skb(dev, skb_len);
2495 if (!skb)
2496 return -ENOMEM;
2497
2498 skb_put_u8(skb, cfgitem);
2499 skb_put_data(skb, cfgdata, cfgdata_len);
2500
2501 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2502 if (IS_ERR(resp))
2503 return PTR_ERR(resp);
2504
2505 dev_kfree_skb(resp);
2506 return 0;
2507 }
2508
pn533_get_firmware_version(struct pn533 * dev,struct pn533_fw_version * fv)2509 static int pn533_get_firmware_version(struct pn533 *dev,
2510 struct pn533_fw_version *fv)
2511 {
2512 struct sk_buff *skb;
2513 struct sk_buff *resp;
2514
2515 skb = pn533_alloc_skb(dev, 0);
2516 if (!skb)
2517 return -ENOMEM;
2518
2519 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2520 if (IS_ERR(resp))
2521 return PTR_ERR(resp);
2522
2523 fv->ic = resp->data[0];
2524 fv->ver = resp->data[1];
2525 fv->rev = resp->data[2];
2526 fv->support = resp->data[3];
2527
2528 dev_kfree_skb(resp);
2529 return 0;
2530 }
2531
pn533_pasori_fw_reset(struct pn533 * dev)2532 static int pn533_pasori_fw_reset(struct pn533 *dev)
2533 {
2534 struct sk_buff *skb;
2535 struct sk_buff *resp;
2536
2537 skb = pn533_alloc_skb(dev, sizeof(u8));
2538 if (!skb)
2539 return -ENOMEM;
2540
2541 skb_put_u8(skb, 0x1);
2542
2543 resp = pn533_send_cmd_sync(dev, 0x18, skb);
2544 if (IS_ERR(resp))
2545 return PTR_ERR(resp);
2546
2547 dev_kfree_skb(resp);
2548
2549 return 0;
2550 }
2551
pn533_rf_field(struct nfc_dev * nfc_dev,u8 rf)2552 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
2553 {
2554 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2555 u8 rf_field = !!rf;
2556 int rc;
2557
2558 rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
2559
2560 rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
2561 (u8 *)&rf_field, 1);
2562 if (rc) {
2563 nfc_err(dev->dev, "Error on setting RF field\n");
2564 return rc;
2565 }
2566
2567 return 0;
2568 }
2569
pn532_sam_configuration(struct nfc_dev * nfc_dev)2570 static int pn532_sam_configuration(struct nfc_dev *nfc_dev)
2571 {
2572 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2573 struct sk_buff *skb;
2574 struct sk_buff *resp;
2575
2576 skb = pn533_alloc_skb(dev, 1);
2577 if (!skb)
2578 return -ENOMEM;
2579
2580 skb_put_u8(skb, 0x01);
2581
2582 resp = pn533_send_cmd_sync(dev, PN533_CMD_SAM_CONFIGURATION, skb);
2583 if (IS_ERR(resp))
2584 return PTR_ERR(resp);
2585
2586 dev_kfree_skb(resp);
2587 return 0;
2588 }
2589
pn533_dev_up(struct nfc_dev * nfc_dev)2590 static int pn533_dev_up(struct nfc_dev *nfc_dev)
2591 {
2592 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2593 int rc;
2594
2595 if (dev->phy_ops->dev_up) {
2596 rc = dev->phy_ops->dev_up(dev);
2597 if (rc)
2598 return rc;
2599 }
2600
2601 if ((dev->device_type == PN533_DEVICE_PN532) ||
2602 (dev->device_type == PN533_DEVICE_PN532_AUTOPOLL)) {
2603 rc = pn532_sam_configuration(nfc_dev);
2604
2605 if (rc)
2606 return rc;
2607 }
2608
2609 return pn533_rf_field(nfc_dev, 1);
2610 }
2611
pn533_dev_down(struct nfc_dev * nfc_dev)2612 static int pn533_dev_down(struct nfc_dev *nfc_dev)
2613 {
2614 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2615 int ret;
2616
2617 ret = pn533_rf_field(nfc_dev, 0);
2618 if (dev->phy_ops->dev_down && !ret)
2619 ret = dev->phy_ops->dev_down(dev);
2620
2621 return ret;
2622 }
2623
2624 static const struct nfc_ops pn533_nfc_ops = {
2625 .dev_up = pn533_dev_up,
2626 .dev_down = pn533_dev_down,
2627 .dep_link_up = pn533_dep_link_up,
2628 .dep_link_down = pn533_dep_link_down,
2629 .start_poll = pn533_start_poll,
2630 .stop_poll = pn533_stop_poll,
2631 .activate_target = pn533_activate_target,
2632 .deactivate_target = pn533_deactivate_target,
2633 .im_transceive = pn533_transceive,
2634 .tm_send = pn533_tm_send,
2635 };
2636
pn533_setup(struct pn533 * dev)2637 static int pn533_setup(struct pn533 *dev)
2638 {
2639 struct pn533_config_max_retries max_retries;
2640 struct pn533_config_timing timing;
2641 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2642 int rc;
2643
2644 switch (dev->device_type) {
2645 case PN533_DEVICE_STD:
2646 case PN533_DEVICE_PASORI:
2647 case PN533_DEVICE_ACR122U:
2648 case PN533_DEVICE_PN532:
2649 case PN533_DEVICE_PN532_AUTOPOLL:
2650 max_retries.mx_rty_atr = 0x2;
2651 max_retries.mx_rty_psl = 0x1;
2652 max_retries.mx_rty_passive_act =
2653 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2654
2655 timing.rfu = PN533_CONFIG_TIMING_102;
2656 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2657 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2658
2659 break;
2660
2661 default:
2662 nfc_err(dev->dev, "Unknown device type %d\n",
2663 dev->device_type);
2664 return -EINVAL;
2665 }
2666
2667 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2668 (u8 *)&max_retries, sizeof(max_retries));
2669 if (rc) {
2670 nfc_err(dev->dev,
2671 "Error on setting MAX_RETRIES config\n");
2672 return rc;
2673 }
2674
2675
2676 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2677 (u8 *)&timing, sizeof(timing));
2678 if (rc) {
2679 nfc_err(dev->dev, "Error on setting RF timings\n");
2680 return rc;
2681 }
2682
2683 switch (dev->device_type) {
2684 case PN533_DEVICE_STD:
2685 case PN533_DEVICE_PN532:
2686 case PN533_DEVICE_PN532_AUTOPOLL:
2687 break;
2688
2689 case PN533_DEVICE_PASORI:
2690 pn533_pasori_fw_reset(dev);
2691
2692 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2693 pasori_cfg, 3);
2694 if (rc) {
2695 nfc_err(dev->dev,
2696 "Error while settings PASORI config\n");
2697 return rc;
2698 }
2699
2700 pn533_pasori_fw_reset(dev);
2701
2702 break;
2703 }
2704
2705 return 0;
2706 }
2707
pn533_finalize_setup(struct pn533 * dev)2708 int pn533_finalize_setup(struct pn533 *dev)
2709 {
2710
2711 struct pn533_fw_version fw_ver;
2712 int rc;
2713
2714 memset(&fw_ver, 0, sizeof(fw_ver));
2715
2716 rc = pn533_get_firmware_version(dev, &fw_ver);
2717 if (rc) {
2718 nfc_err(dev->dev, "Unable to get FW version\n");
2719 return rc;
2720 }
2721
2722 nfc_info(dev->dev, "NXP PN5%02X firmware ver %d.%d now attached\n",
2723 fw_ver.ic, fw_ver.ver, fw_ver.rev);
2724
2725 rc = pn533_setup(dev);
2726 if (rc)
2727 return rc;
2728
2729 return 0;
2730 }
2731 EXPORT_SYMBOL_GPL(pn533_finalize_setup);
2732
pn53x_common_init(u32 device_type,enum pn533_protocol_type protocol_type,void * phy,const struct pn533_phy_ops * phy_ops,struct pn533_frame_ops * fops,struct device * dev)2733 struct pn533 *pn53x_common_init(u32 device_type,
2734 enum pn533_protocol_type protocol_type,
2735 void *phy,
2736 const struct pn533_phy_ops *phy_ops,
2737 struct pn533_frame_ops *fops,
2738 struct device *dev)
2739 {
2740 struct pn533 *priv;
2741
2742 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
2743 if (!priv)
2744 return ERR_PTR(-ENOMEM);
2745
2746 priv->phy = phy;
2747 priv->phy_ops = phy_ops;
2748 priv->dev = dev;
2749 if (fops != NULL)
2750 priv->ops = fops;
2751 else
2752 priv->ops = &pn533_std_frame_ops;
2753
2754 priv->protocol_type = protocol_type;
2755 priv->device_type = device_type;
2756
2757 mutex_init(&priv->cmd_lock);
2758
2759 INIT_WORK(&priv->cmd_work, pn533_wq_cmd);
2760 INIT_WORK(&priv->cmd_complete_work, pn533_wq_cmd_complete);
2761 INIT_WORK(&priv->mi_rx_work, pn533_wq_mi_recv);
2762 INIT_WORK(&priv->mi_tx_work, pn533_wq_mi_send);
2763 INIT_WORK(&priv->tg_work, pn533_wq_tg_get_data);
2764 INIT_WORK(&priv->mi_tm_rx_work, pn533_wq_tm_mi_recv);
2765 INIT_WORK(&priv->mi_tm_tx_work, pn533_wq_tm_mi_send);
2766 INIT_DELAYED_WORK(&priv->poll_work, pn533_wq_poll);
2767 INIT_WORK(&priv->rf_work, pn533_wq_rf);
2768 priv->wq = alloc_ordered_workqueue("pn533", 0);
2769 if (priv->wq == NULL)
2770 goto error;
2771
2772 timer_setup(&priv->listen_timer, pn533_listen_mode_timer, 0);
2773
2774 skb_queue_head_init(&priv->resp_q);
2775 skb_queue_head_init(&priv->fragment_skb);
2776
2777 INIT_LIST_HEAD(&priv->cmd_queue);
2778 return priv;
2779
2780 error:
2781 kfree(priv);
2782 return ERR_PTR(-ENOMEM);
2783 }
2784 EXPORT_SYMBOL_GPL(pn53x_common_init);
2785
pn53x_common_clean(struct pn533 * priv)2786 void pn53x_common_clean(struct pn533 *priv)
2787 {
2788 struct pn533_cmd *cmd, *n;
2789
2790 /* delete the timer before cleanup the worker */
2791 del_timer_sync(&priv->listen_timer);
2792
2793 flush_delayed_work(&priv->poll_work);
2794 destroy_workqueue(priv->wq);
2795
2796 skb_queue_purge(&priv->resp_q);
2797
2798 list_for_each_entry_safe(cmd, n, &priv->cmd_queue, queue) {
2799 list_del(&cmd->queue);
2800 kfree(cmd);
2801 }
2802
2803 kfree(priv);
2804 }
2805 EXPORT_SYMBOL_GPL(pn53x_common_clean);
2806
pn532_i2c_nfc_alloc(struct pn533 * priv,u32 protocols,struct device * parent)2807 int pn532_i2c_nfc_alloc(struct pn533 *priv, u32 protocols,
2808 struct device *parent)
2809 {
2810 priv->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
2811 priv->ops->tx_header_len +
2812 PN533_CMD_DATAEXCH_HEAD_LEN,
2813 priv->ops->tx_tail_len);
2814 if (!priv->nfc_dev)
2815 return -ENOMEM;
2816
2817 nfc_set_parent_dev(priv->nfc_dev, parent);
2818 nfc_set_drvdata(priv->nfc_dev, priv);
2819 return 0;
2820 }
2821 EXPORT_SYMBOL_GPL(pn532_i2c_nfc_alloc);
2822
pn53x_register_nfc(struct pn533 * priv,u32 protocols,struct device * parent)2823 int pn53x_register_nfc(struct pn533 *priv, u32 protocols,
2824 struct device *parent)
2825 {
2826 int rc;
2827
2828 rc = pn532_i2c_nfc_alloc(priv, protocols, parent);
2829 if (rc)
2830 return rc;
2831
2832 rc = nfc_register_device(priv->nfc_dev);
2833 if (rc)
2834 nfc_free_device(priv->nfc_dev);
2835
2836 return rc;
2837 }
2838 EXPORT_SYMBOL_GPL(pn53x_register_nfc);
2839
pn53x_unregister_nfc(struct pn533 * priv)2840 void pn53x_unregister_nfc(struct pn533 *priv)
2841 {
2842 nfc_unregister_device(priv->nfc_dev);
2843 nfc_free_device(priv->nfc_dev);
2844 }
2845 EXPORT_SYMBOL_GPL(pn53x_unregister_nfc);
2846
2847 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
2848 MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2849 MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
2850 MODULE_DESCRIPTION("PN533 driver ver " VERSION);
2851 MODULE_VERSION(VERSION);
2852 MODULE_LICENSE("GPL");
2853