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_dbg(dev->dev, "Listen mode timeout\n");
1239
1240 dev->cancel_listen = 1;
1241
1242 pn533_poll_next_mod(dev);
1243
1244 queue_delayed_work(dev->wq, &dev->poll_work,
1245 msecs_to_jiffies(PN533_POLL_INTERVAL));
1246 }
1247
pn533_rf_complete(struct pn533 * dev,void * arg,struct sk_buff * resp)1248 static int pn533_rf_complete(struct pn533 *dev, void *arg,
1249 struct sk_buff *resp)
1250 {
1251 int rc = 0;
1252
1253 if (IS_ERR(resp)) {
1254 rc = PTR_ERR(resp);
1255
1256 nfc_err(dev->dev, "RF setting error %d\n", rc);
1257
1258 return rc;
1259 }
1260
1261 queue_delayed_work(dev->wq, &dev->poll_work,
1262 msecs_to_jiffies(PN533_POLL_INTERVAL));
1263
1264 dev_kfree_skb(resp);
1265 return rc;
1266 }
1267
pn533_wq_rf(struct work_struct * work)1268 static void pn533_wq_rf(struct work_struct *work)
1269 {
1270 struct pn533 *dev = container_of(work, struct pn533, rf_work);
1271 struct sk_buff *skb;
1272 int rc;
1273
1274 skb = pn533_alloc_skb(dev, 2);
1275 if (!skb)
1276 return;
1277
1278 skb_put_u8(skb, PN533_CFGITEM_RF_FIELD);
1279 skb_put_u8(skb, PN533_CFGITEM_RF_FIELD_AUTO_RFCA);
1280
1281 rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb,
1282 pn533_rf_complete, NULL);
1283 if (rc < 0) {
1284 dev_kfree_skb(skb);
1285 nfc_err(dev->dev, "RF setting error %d\n", rc);
1286 }
1287 }
1288
pn533_poll_dep_complete(struct pn533 * dev,void * arg,struct sk_buff * resp)1289 static int pn533_poll_dep_complete(struct pn533 *dev, void *arg,
1290 struct sk_buff *resp)
1291 {
1292 struct pn533_cmd_jump_dep_response *rsp;
1293 struct nfc_target nfc_target;
1294 u8 target_gt_len;
1295 int rc;
1296
1297 if (IS_ERR(resp))
1298 return PTR_ERR(resp);
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(dev->wq, &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->nfc_dev, &nfc_target, 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->nfc_dev,
1326 rsp->gt, target_gt_len);
1327 if (!rc) {
1328 rc = nfc_dep_link_is_up(dev->nfc_dev,
1329 dev->nfc_dev->targets[0].idx,
1330 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
pn533_poll_dep(struct nfc_dev * nfc_dev)1341 static int pn533_poll_dep(struct nfc_dev *nfc_dev)
1342 {
1343 struct pn533 *dev = nfc_get_drvdata(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(nfc_dev, &dev->gb_len);
1351
1352 if (!dev->gb || !dev->gb_len) {
1353 dev->poll_dep = 0;
1354 queue_work(dev->wq, &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(nfcid3 + 2, 6);
1366
1367 skb = pn533_alloc_skb(dev, skb_len);
1368 if (!skb)
1369 return -ENOMEM;
1370
1371 skb_put_u8(skb, 0x01); /* Active */
1372 skb_put_u8(skb, 0x02); /* 424 kbps */
1373
1374 next = skb_put(skb, 1); /* Next */
1375 *next = 0;
1376
1377 /* Copy passive data */
1378 skb_put_data(skb, passive_data, PASSIVE_DATA_LEN);
1379 *next |= 1;
1380
1381 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
1382 skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE);
1383 *next |= 2;
1384
1385 skb_put_data(skb, dev->gb, dev->gb_len);
1386 *next |= 4; /* We have some Gi */
1387
1388 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
1389 pn533_poll_dep_complete, NULL);
1390
1391 if (rc < 0)
1392 dev_kfree_skb(skb);
1393
1394 return rc;
1395 }
1396
pn533_autopoll_complete(struct pn533 * dev,void * arg,struct sk_buff * resp)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(resp)) {
1406 rc = PTR_ERR(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, apr->tgdata,
1433 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, apr->tgdata,
1439 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, apr->tgdata,
1444 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, apr->tgdata,
1449 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, apr->tgdata,
1454 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->nfc_dev, &nfc_tgt, 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
pn533_poll_complete(struct pn533 * dev,void * arg,struct sk_buff * resp)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(resp)) {
1499 rc = PTR_ERR(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(&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(dev->wq, &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
pn533_alloc_poll_in_frame(struct pn533 * dev,struct pn533_poll_modulations * mod)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, mod->len);
1555 if (!skb)
1556 return NULL;
1557
1558 skb_put_data(skb, &mod->data, mod->len);
1559
1560 return skb;
1561 }
1562
pn533_send_poll_frame(struct pn533 * dev)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(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, skb, 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
pn533_wq_poll(struct work_struct * work)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(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1626 }
1627
pn533_start_poll(struct nfc_dev * nfc_dev,u32 im_protocols,u32 tm_protocols)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(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(nfc_dev, &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, 4 + 6);
1663 if (!skb)
1664 return -ENOMEM;
1665
1666 *((u8 *)skb_put(skb, sizeof(u8))) =
1667 PN532_AUTOPOLL_POLLNR_INFINITE;
1668 *((u8 *)skb_put(skb, 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, sizeof(u8))) =
1674 PN532_AUTOPOLL_TYPE_GENERIC_106;
1675 else {
1676 if (im_protocols & NFC_PROTO_MIFARE_MASK)
1677 *((u8 *)skb_put(skb, sizeof(u8))) =
1678 PN532_AUTOPOLL_TYPE_MIFARE;
1679
1680 if (im_protocols & NFC_PROTO_ISO14443_MASK)
1681 *((u8 *)skb_put(skb, sizeof(u8))) =
1682 PN532_AUTOPOLL_TYPE_ISOA;
1683
1684 if (im_protocols & NFC_PROTO_NFC_DEP_MASK) {
1685 *((u8 *)skb_put(skb, sizeof(u8))) =
1686 PN532_AUTOPOLL_TYPE_DEP_PASSIVE_106;
1687 *((u8 *)skb_put(skb, sizeof(u8))) =
1688 PN532_AUTOPOLL_TYPE_DEP_PASSIVE_212;
1689 *((u8 *)skb_put(skb, 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, sizeof(u8))) =
1697 PN532_AUTOPOLL_TYPE_FELICA212;
1698 *((u8 *)skb_put(skb, sizeof(u8))) =
1699 PN532_AUTOPOLL_TYPE_FELICA424;
1700 }
1701
1702 if (im_protocols & NFC_PROTO_JEWEL_MASK)
1703 *((u8 *)skb_put(skb, sizeof(u8))) =
1704 PN532_AUTOPOLL_TYPE_JEWEL;
1705
1706 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
1707 *((u8 *)skb_put(skb, sizeof(u8))) =
1708 PN532_AUTOPOLL_TYPE_ISOB;
1709
1710 if (tm_protocols)
1711 *((u8 *)skb_put(skb, sizeof(u8))) =
1712 PN532_AUTOPOLL_TYPE_DEP_ACTIVE_106;
1713
1714 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_AUTOPOLL, skb,
1715 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(&rand_mod, 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(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1739
1740 return rc;
1741 }
1742
pn533_stop_poll(struct nfc_dev * nfc_dev)1743 static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1744 {
1745 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1746
1747 del_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(&dev->poll_work);
1757 pn533_poll_reset_mod_list(dev);
1758 }
1759
pn533_activate_target_nfcdep(struct pn533 * dev)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, sizeof(u8) * 2); /*TG + Next*/
1769 if (!skb)
1770 return -ENOMEM;
1771
1772 skb_put_u8(skb, 1); /* TG */
1773 skb_put_u8(skb, 0); /* Next */
1774
1775 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1776 if (IS_ERR(resp))
1777 return PTR_ERR(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->nfc_dev, rsp->gt, gt_len);
1791
1792 dev_kfree_skb(resp);
1793 return rc;
1794 }
1795
pn533_activate_target(struct nfc_dev * nfc_dev,struct nfc_target * target,u32 protocol)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(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
pn533_deactivate_target_complete(struct pn533 * dev,void * arg,struct sk_buff * resp)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(resp)) {
1850 rc = PTR_ERR(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
pn533_deactivate_target(struct nfc_dev * nfc_dev,struct nfc_target * target,u8 mode)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(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(&dev->resp_q);
1880
1881 skb = pn533_alloc_skb(dev, sizeof(u8));
1882 if (!skb)
1883 return;
1884
1885 skb_put_u8(skb, 1); /* TG*/
1886
1887 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_RELEASE, skb,
1888 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
pn533_in_dep_link_up_complete(struct pn533 * dev,void * arg,struct sk_buff * resp)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(arg);
1905
1906 if (IS_ERR(resp))
1907 return PTR_ERR(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 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1932 nfc_target.nfcid1_len = 10;
1933 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
1934 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1935 if (rc)
1936 goto error;
1937
1938 dev->tgt_available_prots = 0;
1939 }
1940
1941 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1942
1943 /* ATR_RES general bytes are located at offset 17 */
1944 target_gt_len = resp->len - 17;
1945 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1946 rsp->gt, target_gt_len);
1947 if (rc == 0)
1948 rc = nfc_dep_link_is_up(dev->nfc_dev,
1949 dev->nfc_dev->targets[0].idx,
1950 !active, NFC_RF_INITIATOR);
1951
1952 error:
1953 dev_kfree_skb(resp);
1954 return rc;
1955 }
1956
1957 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)1958 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
1959 u8 comm_mode, u8 *gb, size_t gb_len)
1960 {
1961 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1962 struct sk_buff *skb;
1963 int rc, skb_len;
1964 u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE];
1965 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
1966
1967 if (dev->poll_mod_count) {
1968 nfc_err(dev->dev,
1969 "Cannot bring the DEP link up while polling\n");
1970 return -EBUSY;
1971 }
1972
1973 if (dev->tgt_active_prot) {
1974 nfc_err(dev->dev,
1975 "There is already an active target\n");
1976 return -EBUSY;
1977 }
1978
1979 skb_len = 3 + gb_len; /* ActPass + BR + Next */
1980 skb_len += PASSIVE_DATA_LEN;
1981
1982 /* NFCID3 */
1983 skb_len += NFC_NFCID3_MAXSIZE;
1984 if (target && !target->nfcid2_len) {
1985 nfcid3[0] = 0x1;
1986 nfcid3[1] = 0xfe;
1987 get_random_bytes(nfcid3 + 2, 6);
1988 }
1989
1990 skb = pn533_alloc_skb(dev, skb_len);
1991 if (!skb)
1992 return -ENOMEM;
1993
1994 skb_put_u8(skb, !comm_mode); /* ActPass */
1995 skb_put_u8(skb, 0x02); /* 424 kbps */
1996
1997 next = skb_put(skb, 1); /* Next */
1998 *next = 0;
1999
2000 /* Copy passive data */
2001 skb_put_data(skb, passive_data, PASSIVE_DATA_LEN);
2002 *next |= 1;
2003
2004 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
2005 if (target && target->nfcid2_len)
2006 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2,
2007 target->nfcid2_len);
2008 else
2009 skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE);
2010 *next |= 2;
2011
2012 if (gb != NULL && gb_len > 0) {
2013 skb_put_data(skb, gb, gb_len);
2014 *next |= 4; /* We have some Gi */
2015 } else {
2016 *next = 0;
2017 }
2018
2019 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2020 if (!arg) {
2021 dev_kfree_skb(skb);
2022 return -ENOMEM;
2023 }
2024
2025 *arg = !comm_mode;
2026
2027 pn533_rf_field(dev->nfc_dev, 0);
2028
2029 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
2030 pn533_in_dep_link_up_complete, arg);
2031
2032 if (rc < 0) {
2033 dev_kfree_skb(skb);
2034 kfree(arg);
2035 }
2036
2037 return rc;
2038 }
2039
pn533_dep_link_down(struct nfc_dev * nfc_dev)2040 static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
2041 {
2042 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2043
2044 pn533_poll_reset_mod_list(dev);
2045
2046 if (dev->tgt_mode || dev->tgt_active_prot)
2047 dev->phy_ops->abort_cmd(dev, GFP_KERNEL);
2048
2049 dev->tgt_active_prot = 0;
2050 dev->tgt_mode = 0;
2051
2052 skb_queue_purge(&dev->resp_q);
2053
2054 return 0;
2055 }
2056
2057 struct pn533_data_exchange_arg {
2058 data_exchange_cb_t cb;
2059 void *cb_context;
2060 };
2061
pn533_build_response(struct pn533 * dev)2062 static struct sk_buff *pn533_build_response(struct pn533 *dev)
2063 {
2064 struct sk_buff *skb, *tmp, *t;
2065 unsigned int skb_len = 0, tmp_len = 0;
2066
2067 if (skb_queue_empty(&dev->resp_q))
2068 return NULL;
2069
2070 if (skb_queue_len(&dev->resp_q) == 1) {
2071 skb = skb_dequeue(&dev->resp_q);
2072 goto out;
2073 }
2074
2075 skb_queue_walk_safe(&dev->resp_q, tmp, t)
2076 skb_len += tmp->len;
2077
2078 dev_dbg(dev->dev, "%s total length %d\n",
2079 __func__, skb_len);
2080
2081 skb = alloc_skb(skb_len, GFP_KERNEL);
2082 if (skb == NULL)
2083 goto out;
2084
2085 skb_put(skb, skb_len);
2086
2087 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2088 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2089 tmp_len += tmp->len;
2090 }
2091
2092 out:
2093 skb_queue_purge(&dev->resp_q);
2094
2095 return skb;
2096 }
2097
pn533_data_exchange_complete(struct pn533 * dev,void * _arg,struct sk_buff * resp)2098 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
2099 struct sk_buff *resp)
2100 {
2101 struct pn533_data_exchange_arg *arg = _arg;
2102 struct sk_buff *skb;
2103 int rc = 0;
2104 u8 status, ret, mi;
2105
2106 if (IS_ERR(resp)) {
2107 rc = PTR_ERR(resp);
2108 goto _error;
2109 }
2110
2111 status = resp->data[0];
2112 ret = status & PN533_CMD_RET_MASK;
2113 mi = status & PN533_CMD_MI_MASK;
2114
2115 skb_pull(resp, sizeof(status));
2116
2117 if (ret != PN533_CMD_RET_SUCCESS) {
2118 nfc_err(dev->dev,
2119 "Exchanging data failed (error 0x%x)\n", ret);
2120 rc = -EIO;
2121 goto error;
2122 }
2123
2124 skb_queue_tail(&dev->resp_q, resp);
2125
2126 if (mi) {
2127 dev->cmd_complete_mi_arg = arg;
2128 queue_work(dev->wq, &dev->mi_rx_work);
2129 return -EINPROGRESS;
2130 }
2131
2132 /* Prepare for the next round */
2133 if (skb_queue_len(&dev->fragment_skb) > 0) {
2134 dev->cmd_complete_dep_arg = arg;
2135 queue_work(dev->wq, &dev->mi_tx_work);
2136
2137 return -EINPROGRESS;
2138 }
2139
2140 skb = pn533_build_response(dev);
2141 if (!skb) {
2142 rc = -ENOMEM;
2143 goto error;
2144 }
2145
2146 arg->cb(arg->cb_context, skb, 0);
2147 kfree(arg);
2148 return 0;
2149
2150 error:
2151 dev_kfree_skb(resp);
2152 _error:
2153 skb_queue_purge(&dev->resp_q);
2154 arg->cb(arg->cb_context, NULL, rc);
2155 kfree(arg);
2156 return rc;
2157 }
2158
2159 /*
2160 * Receive an incoming pn533 frame. skb contains only header and payload.
2161 * If skb == NULL, it is a notification that the link below is dead.
2162 */
pn533_recv_frame(struct pn533 * dev,struct sk_buff * skb,int status)2163 void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status)
2164 {
2165 if (!dev->cmd)
2166 goto sched_wq;
2167
2168 dev->cmd->status = status;
2169
2170 if (status != 0) {
2171 dev_dbg(dev->dev, "%s: Error received: %d\n", __func__, status);
2172 goto sched_wq;
2173 }
2174
2175 if (skb == NULL) {
2176 pr_err("NULL Frame -> link is dead\n");
2177 goto sched_wq;
2178 }
2179
2180 if (pn533_rx_frame_is_ack(skb->data)) {
2181 dev_dbg(dev->dev, "%s: Received ACK frame\n", __func__);
2182 dev_kfree_skb(skb);
2183 return;
2184 }
2185
2186 print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, skb->data,
2187 dev->ops->rx_frame_size(skb->data), false);
2188
2189 if (!dev->ops->rx_is_frame_valid(skb->data, dev)) {
2190 nfc_err(dev->dev, "Received an invalid frame\n");
2191 dev->cmd->status = -EIO;
2192 } else if (!pn533_rx_frame_is_cmd_response(dev, skb->data)) {
2193 nfc_err(dev->dev, "It it not the response to the last command\n");
2194 dev->cmd->status = -EIO;
2195 }
2196
2197 dev->cmd->resp = skb;
2198
2199 sched_wq:
2200 queue_work(dev->wq, &dev->cmd_complete_work);
2201 }
2202 EXPORT_SYMBOL(pn533_recv_frame);
2203
2204 /* Split the Tx skb into small chunks */
pn533_fill_fragment_skbs(struct pn533 * dev,struct sk_buff * skb)2205 static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb)
2206 {
2207 struct sk_buff *frag;
2208 int frag_size;
2209
2210 do {
2211 /* Remaining size */
2212 if (skb->len > PN533_CMD_DATAFRAME_MAXLEN)
2213 frag_size = PN533_CMD_DATAFRAME_MAXLEN;
2214 else
2215 frag_size = skb->len;
2216
2217 /* Allocate and reserve */
2218 frag = pn533_alloc_skb(dev, frag_size);
2219 if (!frag) {
2220 skb_queue_purge(&dev->fragment_skb);
2221 break;
2222 }
2223
2224 if (!dev->tgt_mode) {
2225 /* Reserve the TG/MI byte */
2226 skb_reserve(frag, 1);
2227
2228 /* MI + TG */
2229 if (frag_size == PN533_CMD_DATAFRAME_MAXLEN)
2230 *(u8 *)skb_push(frag, sizeof(u8)) =
2231 (PN533_CMD_MI_MASK | 1);
2232 else
2233 *(u8 *)skb_push(frag, sizeof(u8)) = 1; /* TG */
2234 }
2235
2236 skb_put_data(frag, skb->data, frag_size);
2237
2238 /* Reduce the size of incoming buffer */
2239 skb_pull(skb, frag_size);
2240
2241 /* Add this to skb_queue */
2242 skb_queue_tail(&dev->fragment_skb, frag);
2243
2244 } while (skb->len > 0);
2245
2246 dev_kfree_skb(skb);
2247
2248 return skb_queue_len(&dev->fragment_skb);
2249 }
2250
pn533_transceive(struct nfc_dev * nfc_dev,struct nfc_target * target,struct sk_buff * skb,data_exchange_cb_t cb,void * cb_context)2251 static int pn533_transceive(struct nfc_dev *nfc_dev,
2252 struct nfc_target *target, struct sk_buff *skb,
2253 data_exchange_cb_t cb, void *cb_context)
2254 {
2255 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2256 struct pn533_data_exchange_arg *arg = NULL;
2257 int rc;
2258
2259 if (!dev->tgt_active_prot) {
2260 nfc_err(dev->dev,
2261 "Can't exchange data if there is no active target\n");
2262 rc = -EINVAL;
2263 goto error;
2264 }
2265
2266 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2267 if (!arg) {
2268 rc = -ENOMEM;
2269 goto error;
2270 }
2271
2272 arg->cb = cb;
2273 arg->cb_context = cb_context;
2274
2275 switch (dev->device_type) {
2276 case PN533_DEVICE_PASORI:
2277 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2278 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2279 skb,
2280 pn533_data_exchange_complete,
2281 arg);
2282
2283 break;
2284 }
2285 fallthrough;
2286 default:
2287 /* jumbo frame ? */
2288 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2289 rc = pn533_fill_fragment_skbs(dev, skb);
2290 if (rc <= 0)
2291 goto error;
2292
2293 skb = skb_dequeue(&dev->fragment_skb);
2294 if (!skb) {
2295 rc = -EIO;
2296 goto error;
2297 }
2298 } else {
2299 *(u8 *)skb_push(skb, sizeof(u8)) = 1; /* TG */
2300 }
2301
2302 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2303 skb, pn533_data_exchange_complete,
2304 arg);
2305
2306 break;
2307 }
2308
2309 if (rc < 0) /* rc from send_async */
2310 goto error;
2311
2312 return 0;
2313
2314 error:
2315 kfree(arg);
2316 dev_kfree_skb(skb);
2317 return rc;
2318 }
2319
pn533_tm_send_complete(struct pn533 * dev,void * arg,struct sk_buff * resp)2320 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
2321 struct sk_buff *resp)
2322 {
2323 u8 status;
2324
2325 if (IS_ERR(resp))
2326 return PTR_ERR(resp);
2327
2328 status = resp->data[0];
2329
2330 /* Prepare for the next round */
2331 if (skb_queue_len(&dev->fragment_skb) > 0) {
2332 queue_work(dev->wq, &dev->mi_tm_tx_work);
2333 return -EINPROGRESS;
2334 }
2335 dev_kfree_skb(resp);
2336
2337 if (status != 0) {
2338 nfc_tm_deactivated(dev->nfc_dev);
2339
2340 dev->tgt_mode = 0;
2341
2342 return 0;
2343 }
2344
2345 queue_work(dev->wq, &dev->tg_work);
2346
2347 return 0;
2348 }
2349
pn533_tm_send(struct nfc_dev * nfc_dev,struct sk_buff * skb)2350 static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2351 {
2352 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2353 int rc;
2354
2355 /* let's split in multiple chunks if size's too big */
2356 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2357 rc = pn533_fill_fragment_skbs(dev, skb);
2358 if (rc <= 0)
2359 goto error;
2360
2361 /* get the first skb */
2362 skb = skb_dequeue(&dev->fragment_skb);
2363 if (!skb) {
2364 rc = -EIO;
2365 goto error;
2366 }
2367
2368 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_META_DATA, skb,
2369 pn533_tm_send_complete, NULL);
2370 } else {
2371 /* Send th skb */
2372 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2373 pn533_tm_send_complete, NULL);
2374 }
2375
2376 error:
2377 if (rc < 0) {
2378 dev_kfree_skb(skb);
2379 skb_queue_purge(&dev->fragment_skb);
2380 }
2381
2382 return rc;
2383 }
2384
pn533_wq_mi_recv(struct work_struct * work)2385 static void pn533_wq_mi_recv(struct work_struct *work)
2386 {
2387 struct pn533 *dev = container_of(work, struct pn533, mi_rx_work);
2388 struct sk_buff *skb;
2389 int rc;
2390
2391 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
2392 if (!skb)
2393 goto error;
2394
2395 switch (dev->device_type) {
2396 case PN533_DEVICE_PASORI:
2397 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2398 rc = pn533_send_cmd_direct_async(dev,
2399 PN533_CMD_IN_COMM_THRU,
2400 skb,
2401 pn533_data_exchange_complete,
2402 dev->cmd_complete_mi_arg);
2403
2404 break;
2405 }
2406 fallthrough;
2407 default:
2408 skb_put_u8(skb, 1); /*TG*/
2409
2410 rc = pn533_send_cmd_direct_async(dev,
2411 PN533_CMD_IN_DATA_EXCHANGE,
2412 skb,
2413 pn533_data_exchange_complete,
2414 dev->cmd_complete_mi_arg);
2415
2416 break;
2417 }
2418
2419 if (rc == 0) /* success */
2420 return;
2421
2422 nfc_err(dev->dev,
2423 "Error %d when trying to perform data_exchange\n", rc);
2424
2425 dev_kfree_skb(skb);
2426 kfree(dev->cmd_complete_mi_arg);
2427
2428 error:
2429 dev->phy_ops->send_ack(dev, GFP_KERNEL);
2430 queue_work(dev->wq, &dev->cmd_work);
2431 }
2432
pn533_wq_mi_send(struct work_struct * work)2433 static void pn533_wq_mi_send(struct work_struct *work)
2434 {
2435 struct pn533 *dev = container_of(work, struct pn533, mi_tx_work);
2436 struct sk_buff *skb;
2437 int rc;
2438
2439 /* Grab the first skb in the queue */
2440 skb = skb_dequeue(&dev->fragment_skb);
2441
2442 if (skb == NULL) { /* No more data */
2443 /* Reset the queue for future use */
2444 skb_queue_head_init(&dev->fragment_skb);
2445 goto error;
2446 }
2447
2448 switch (dev->device_type) {
2449 case PN533_DEVICE_PASORI:
2450 if (dev->tgt_active_prot != NFC_PROTO_FELICA) {
2451 rc = -EIO;
2452 break;
2453 }
2454
2455 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU,
2456 skb,
2457 pn533_data_exchange_complete,
2458 dev->cmd_complete_dep_arg);
2459
2460 break;
2461
2462 default:
2463 /* Still some fragments? */
2464 rc = pn533_send_cmd_direct_async(dev,
2465 PN533_CMD_IN_DATA_EXCHANGE,
2466 skb,
2467 pn533_data_exchange_complete,
2468 dev->cmd_complete_dep_arg);
2469
2470 break;
2471 }
2472
2473 if (rc == 0) /* success */
2474 return;
2475
2476 nfc_err(dev->dev,
2477 "Error %d when trying to perform data_exchange\n", rc);
2478
2479 dev_kfree_skb(skb);
2480 kfree(dev->cmd_complete_dep_arg);
2481
2482 error:
2483 dev->phy_ops->send_ack(dev, GFP_KERNEL);
2484 queue_work(dev->wq, &dev->cmd_work);
2485 }
2486
pn533_set_configuration(struct pn533 * dev,u8 cfgitem,u8 * cfgdata,u8 cfgdata_len)2487 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2488 u8 cfgdata_len)
2489 {
2490 struct sk_buff *skb;
2491 struct sk_buff *resp;
2492 int skb_len;
2493
2494 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
2495
2496 skb = pn533_alloc_skb(dev, skb_len);
2497 if (!skb)
2498 return -ENOMEM;
2499
2500 skb_put_u8(skb, cfgitem);
2501 skb_put_data(skb, cfgdata, cfgdata_len);
2502
2503 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2504 if (IS_ERR(resp))
2505 return PTR_ERR(resp);
2506
2507 dev_kfree_skb(resp);
2508 return 0;
2509 }
2510
pn533_get_firmware_version(struct pn533 * dev,struct pn533_fw_version * fv)2511 static int pn533_get_firmware_version(struct pn533 *dev,
2512 struct pn533_fw_version *fv)
2513 {
2514 struct sk_buff *skb;
2515 struct sk_buff *resp;
2516
2517 skb = pn533_alloc_skb(dev, 0);
2518 if (!skb)
2519 return -ENOMEM;
2520
2521 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2522 if (IS_ERR(resp))
2523 return PTR_ERR(resp);
2524
2525 fv->ic = resp->data[0];
2526 fv->ver = resp->data[1];
2527 fv->rev = resp->data[2];
2528 fv->support = resp->data[3];
2529
2530 dev_kfree_skb(resp);
2531 return 0;
2532 }
2533
pn533_pasori_fw_reset(struct pn533 * dev)2534 static int pn533_pasori_fw_reset(struct pn533 *dev)
2535 {
2536 struct sk_buff *skb;
2537 struct sk_buff *resp;
2538
2539 skb = pn533_alloc_skb(dev, sizeof(u8));
2540 if (!skb)
2541 return -ENOMEM;
2542
2543 skb_put_u8(skb, 0x1);
2544
2545 resp = pn533_send_cmd_sync(dev, 0x18, skb);
2546 if (IS_ERR(resp))
2547 return PTR_ERR(resp);
2548
2549 dev_kfree_skb(resp);
2550
2551 return 0;
2552 }
2553
pn533_rf_field(struct nfc_dev * nfc_dev,u8 rf)2554 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
2555 {
2556 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2557 u8 rf_field = !!rf;
2558 int rc;
2559
2560 rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
2561
2562 rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
2563 (u8 *)&rf_field, 1);
2564 if (rc) {
2565 nfc_err(dev->dev, "Error on setting RF field\n");
2566 return rc;
2567 }
2568
2569 return 0;
2570 }
2571
pn532_sam_configuration(struct nfc_dev * nfc_dev)2572 static int pn532_sam_configuration(struct nfc_dev *nfc_dev)
2573 {
2574 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2575 struct sk_buff *skb;
2576 struct sk_buff *resp;
2577
2578 skb = pn533_alloc_skb(dev, 1);
2579 if (!skb)
2580 return -ENOMEM;
2581
2582 skb_put_u8(skb, 0x01);
2583
2584 resp = pn533_send_cmd_sync(dev, PN533_CMD_SAM_CONFIGURATION, skb);
2585 if (IS_ERR(resp))
2586 return PTR_ERR(resp);
2587
2588 dev_kfree_skb(resp);
2589 return 0;
2590 }
2591
pn533_dev_up(struct nfc_dev * nfc_dev)2592 static int pn533_dev_up(struct nfc_dev *nfc_dev)
2593 {
2594 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2595 int rc;
2596
2597 if (dev->phy_ops->dev_up) {
2598 rc = dev->phy_ops->dev_up(dev);
2599 if (rc)
2600 return rc;
2601 }
2602
2603 if ((dev->device_type == PN533_DEVICE_PN532) ||
2604 (dev->device_type == PN533_DEVICE_PN532_AUTOPOLL)) {
2605 rc = pn532_sam_configuration(nfc_dev);
2606
2607 if (rc)
2608 return rc;
2609 }
2610
2611 return pn533_rf_field(nfc_dev, 1);
2612 }
2613
pn533_dev_down(struct nfc_dev * nfc_dev)2614 static int pn533_dev_down(struct nfc_dev *nfc_dev)
2615 {
2616 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2617 int ret;
2618
2619 ret = pn533_rf_field(nfc_dev, 0);
2620 if (dev->phy_ops->dev_down && !ret)
2621 ret = dev->phy_ops->dev_down(dev);
2622
2623 return ret;
2624 }
2625
2626 static const struct nfc_ops pn533_nfc_ops = {
2627 .dev_up = pn533_dev_up,
2628 .dev_down = pn533_dev_down,
2629 .dep_link_up = pn533_dep_link_up,
2630 .dep_link_down = pn533_dep_link_down,
2631 .start_poll = pn533_start_poll,
2632 .stop_poll = pn533_stop_poll,
2633 .activate_target = pn533_activate_target,
2634 .deactivate_target = pn533_deactivate_target,
2635 .im_transceive = pn533_transceive,
2636 .tm_send = pn533_tm_send,
2637 };
2638
pn533_setup(struct pn533 * dev)2639 static int pn533_setup(struct pn533 *dev)
2640 {
2641 struct pn533_config_max_retries max_retries;
2642 struct pn533_config_timing timing;
2643 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2644 int rc;
2645
2646 switch (dev->device_type) {
2647 case PN533_DEVICE_STD:
2648 case PN533_DEVICE_PASORI:
2649 case PN533_DEVICE_ACR122U:
2650 case PN533_DEVICE_PN532:
2651 case PN533_DEVICE_PN532_AUTOPOLL:
2652 max_retries.mx_rty_atr = 0x2;
2653 max_retries.mx_rty_psl = 0x1;
2654 max_retries.mx_rty_passive_act =
2655 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2656
2657 timing.rfu = PN533_CONFIG_TIMING_102;
2658 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2659 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2660
2661 break;
2662
2663 default:
2664 nfc_err(dev->dev, "Unknown device type %d\n",
2665 dev->device_type);
2666 return -EINVAL;
2667 }
2668
2669 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2670 (u8 *)&max_retries, sizeof(max_retries));
2671 if (rc) {
2672 nfc_err(dev->dev,
2673 "Error on setting MAX_RETRIES config\n");
2674 return rc;
2675 }
2676
2677
2678 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2679 (u8 *)&timing, sizeof(timing));
2680 if (rc) {
2681 nfc_err(dev->dev, "Error on setting RF timings\n");
2682 return rc;
2683 }
2684
2685 switch (dev->device_type) {
2686 case PN533_DEVICE_STD:
2687 case PN533_DEVICE_PN532:
2688 case PN533_DEVICE_PN532_AUTOPOLL:
2689 break;
2690
2691 case PN533_DEVICE_PASORI:
2692 pn533_pasori_fw_reset(dev);
2693
2694 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2695 pasori_cfg, 3);
2696 if (rc) {
2697 nfc_err(dev->dev,
2698 "Error while settings PASORI config\n");
2699 return rc;
2700 }
2701
2702 pn533_pasori_fw_reset(dev);
2703
2704 break;
2705 }
2706
2707 return 0;
2708 }
2709
pn533_finalize_setup(struct pn533 * dev)2710 int pn533_finalize_setup(struct pn533 *dev)
2711 {
2712
2713 struct pn533_fw_version fw_ver;
2714 int rc;
2715
2716 memset(&fw_ver, 0, sizeof(fw_ver));
2717
2718 rc = pn533_get_firmware_version(dev, &fw_ver);
2719 if (rc) {
2720 nfc_err(dev->dev, "Unable to get FW version\n");
2721 return rc;
2722 }
2723
2724 nfc_info(dev->dev, "NXP PN5%02X firmware ver %d.%d now attached\n",
2725 fw_ver.ic, fw_ver.ver, fw_ver.rev);
2726
2727 rc = pn533_setup(dev);
2728 if (rc)
2729 return rc;
2730
2731 return 0;
2732 }
2733 EXPORT_SYMBOL_GPL(pn533_finalize_setup);
2734
pn53x_common_init(u32 device_type,enum pn533_protocol_type protocol_type,void * phy,struct pn533_phy_ops * phy_ops,struct pn533_frame_ops * fops,struct device * dev)2735 struct pn533 *pn53x_common_init(u32 device_type,
2736 enum pn533_protocol_type protocol_type,
2737 void *phy,
2738 struct pn533_phy_ops *phy_ops,
2739 struct pn533_frame_ops *fops,
2740 struct device *dev)
2741 {
2742 struct pn533 *priv;
2743
2744 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
2745 if (!priv)
2746 return ERR_PTR(-ENOMEM);
2747
2748 priv->phy = phy;
2749 priv->phy_ops = phy_ops;
2750 priv->dev = dev;
2751 if (fops != NULL)
2752 priv->ops = fops;
2753 else
2754 priv->ops = &pn533_std_frame_ops;
2755
2756 priv->protocol_type = protocol_type;
2757 priv->device_type = device_type;
2758
2759 mutex_init(&priv->cmd_lock);
2760
2761 INIT_WORK(&priv->cmd_work, pn533_wq_cmd);
2762 INIT_WORK(&priv->cmd_complete_work, pn533_wq_cmd_complete);
2763 INIT_WORK(&priv->mi_rx_work, pn533_wq_mi_recv);
2764 INIT_WORK(&priv->mi_tx_work, pn533_wq_mi_send);
2765 INIT_WORK(&priv->tg_work, pn533_wq_tg_get_data);
2766 INIT_WORK(&priv->mi_tm_rx_work, pn533_wq_tm_mi_recv);
2767 INIT_WORK(&priv->mi_tm_tx_work, pn533_wq_tm_mi_send);
2768 INIT_DELAYED_WORK(&priv->poll_work, pn533_wq_poll);
2769 INIT_WORK(&priv->rf_work, pn533_wq_rf);
2770 priv->wq = alloc_ordered_workqueue("pn533", 0);
2771 if (priv->wq == NULL)
2772 goto error;
2773
2774 timer_setup(&priv->listen_timer, pn533_listen_mode_timer, 0);
2775
2776 skb_queue_head_init(&priv->resp_q);
2777 skb_queue_head_init(&priv->fragment_skb);
2778
2779 INIT_LIST_HEAD(&priv->cmd_queue);
2780 return priv;
2781
2782 error:
2783 kfree(priv);
2784 return ERR_PTR(-ENOMEM);
2785 }
2786 EXPORT_SYMBOL_GPL(pn53x_common_init);
2787
pn53x_common_clean(struct pn533 * priv)2788 void pn53x_common_clean(struct pn533 *priv)
2789 {
2790 struct pn533_cmd *cmd, *n;
2791
2792 flush_delayed_work(&priv->poll_work);
2793 destroy_workqueue(priv->wq);
2794
2795 skb_queue_purge(&priv->resp_q);
2796
2797 del_timer(&priv->listen_timer);
2798
2799 list_for_each_entry_safe(cmd, n, &priv->cmd_queue, queue) {
2800 list_del(&cmd->queue);
2801 kfree(cmd);
2802 }
2803
2804 kfree(priv);
2805 }
2806 EXPORT_SYMBOL_GPL(pn53x_common_clean);
2807
pn532_i2c_nfc_alloc(struct pn533 * priv,u32 protocols,struct device * parent)2808 int pn532_i2c_nfc_alloc(struct pn533 *priv, u32 protocols,
2809 struct device *parent)
2810 {
2811 priv->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
2812 priv->ops->tx_header_len +
2813 PN533_CMD_DATAEXCH_HEAD_LEN,
2814 priv->ops->tx_tail_len);
2815 if (!priv->nfc_dev)
2816 return -ENOMEM;
2817
2818 nfc_set_parent_dev(priv->nfc_dev, parent);
2819 nfc_set_drvdata(priv->nfc_dev, priv);
2820 return 0;
2821 }
2822 EXPORT_SYMBOL_GPL(pn532_i2c_nfc_alloc);
2823
pn53x_register_nfc(struct pn533 * priv,u32 protocols,struct device * parent)2824 int pn53x_register_nfc(struct pn533 *priv, u32 protocols,
2825 struct device *parent)
2826 {
2827 int rc;
2828
2829 rc = pn532_i2c_nfc_alloc(priv, protocols, parent);
2830 if (rc)
2831 return rc;
2832
2833 rc = nfc_register_device(priv->nfc_dev);
2834 if (rc)
2835 nfc_free_device(priv->nfc_dev);
2836
2837 return rc;
2838 }
2839 EXPORT_SYMBOL_GPL(pn53x_register_nfc);
2840
pn53x_unregister_nfc(struct pn533 * priv)2841 void pn53x_unregister_nfc(struct pn533 *priv)
2842 {
2843 nfc_unregister_device(priv->nfc_dev);
2844 nfc_free_device(priv->nfc_dev);
2845 }
2846 EXPORT_SYMBOL_GPL(pn53x_unregister_nfc);
2847
2848 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
2849 MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2850 MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
2851 MODULE_DESCRIPTION("PN533 driver ver " VERSION);
2852 MODULE_VERSION(VERSION);
2853 MODULE_LICENSE("GPL");
2854
