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
189 /* PN533_TG_INIT_AS_TARGET */
190 #define PN533_INIT_TARGET_PASSIVE 0x1
191 #define PN533_INIT_TARGET_DEP 0x2
192
193 #define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
194 #define PN533_INIT_TARGET_RESP_ACTIVE 0x1
195 #define PN533_INIT_TARGET_RESP_DEP 0x4
196
197 /* The rule: value(high byte) + value(low byte) + checksum = 0 */
pn533_ext_checksum(u16 value)198 static inline u8 pn533_ext_checksum(u16 value)
199 {
200 return ~(u8)(((value & 0xFF00) >> 8) + (u8)(value & 0xFF)) + 1;
201 }
202
203 /* The rule: value + checksum = 0 */
pn533_std_checksum(u8 value)204 static inline u8 pn533_std_checksum(u8 value)
205 {
206 return ~value + 1;
207 }
208
209 /* The rule: sum(data elements) + checksum = 0 */
pn533_std_data_checksum(u8 * data,int datalen)210 static u8 pn533_std_data_checksum(u8 *data, int datalen)
211 {
212 u8 sum = 0;
213 int i;
214
215 for (i = 0; i < datalen; i++)
216 sum += data[i];
217
218 return pn533_std_checksum(sum);
219 }
220
pn533_std_tx_frame_init(void * _frame,u8 cmd_code)221 static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
222 {
223 struct pn533_std_frame *frame = _frame;
224
225 frame->preamble = 0;
226 frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
227 PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
228 PN533_FRAME_CMD(frame) = cmd_code;
229 frame->datalen = 2;
230 }
231
pn533_std_tx_frame_finish(void * _frame)232 static void pn533_std_tx_frame_finish(void *_frame)
233 {
234 struct pn533_std_frame *frame = _frame;
235
236 frame->datalen_checksum = pn533_std_checksum(frame->datalen);
237
238 PN533_STD_FRAME_CHECKSUM(frame) =
239 pn533_std_data_checksum(frame->data, frame->datalen);
240
241 PN533_STD_FRAME_POSTAMBLE(frame) = 0;
242 }
243
pn533_std_tx_update_payload_len(void * _frame,int len)244 static void pn533_std_tx_update_payload_len(void *_frame, int len)
245 {
246 struct pn533_std_frame *frame = _frame;
247
248 frame->datalen += len;
249 }
250
pn533_std_rx_frame_is_valid(void * _frame,struct pn533 * dev)251 static bool pn533_std_rx_frame_is_valid(void *_frame, struct pn533 *dev)
252 {
253 u8 checksum;
254 struct pn533_std_frame *stdf = _frame;
255
256 if (stdf->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
257 return false;
258
259 if (likely(!PN533_STD_IS_EXTENDED(stdf))) {
260 /* Standard frame code */
261 dev->ops->rx_header_len = PN533_STD_FRAME_HEADER_LEN;
262
263 checksum = pn533_std_checksum(stdf->datalen);
264 if (checksum != stdf->datalen_checksum)
265 return false;
266
267 checksum = pn533_std_data_checksum(stdf->data, stdf->datalen);
268 if (checksum != PN533_STD_FRAME_CHECKSUM(stdf))
269 return false;
270 } else {
271 /* Extended */
272 struct pn533_ext_frame *eif = _frame;
273
274 dev->ops->rx_header_len = PN533_EXT_FRAME_HEADER_LEN;
275
276 checksum = pn533_ext_checksum(be16_to_cpu(eif->datalen));
277 if (checksum != eif->datalen_checksum)
278 return false;
279
280 /* check data checksum */
281 checksum = pn533_std_data_checksum(eif->data,
282 be16_to_cpu(eif->datalen));
283 if (checksum != PN533_EXT_FRAME_CHECKSUM(eif))
284 return false;
285 }
286
287 return true;
288 }
289
pn533_rx_frame_is_ack(void * _frame)290 bool pn533_rx_frame_is_ack(void *_frame)
291 {
292 struct pn533_std_frame *frame = _frame;
293
294 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
295 return false;
296
297 if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
298 return false;
299
300 return true;
301 }
302 EXPORT_SYMBOL_GPL(pn533_rx_frame_is_ack);
303
pn533_std_rx_frame_size(void * frame)304 static inline int pn533_std_rx_frame_size(void *frame)
305 {
306 struct pn533_std_frame *f = frame;
307
308 /* check for Extended Information frame */
309 if (PN533_STD_IS_EXTENDED(f)) {
310 struct pn533_ext_frame *eif = frame;
311
312 return sizeof(struct pn533_ext_frame)
313 + be16_to_cpu(eif->datalen) + PN533_STD_FRAME_TAIL_LEN;
314 }
315
316 return sizeof(struct pn533_std_frame) + f->datalen +
317 PN533_STD_FRAME_TAIL_LEN;
318 }
319
pn533_std_get_cmd_code(void * frame)320 static u8 pn533_std_get_cmd_code(void *frame)
321 {
322 struct pn533_std_frame *f = frame;
323 struct pn533_ext_frame *eif = frame;
324
325 if (PN533_STD_IS_EXTENDED(f))
326 return PN533_FRAME_CMD(eif);
327 else
328 return PN533_FRAME_CMD(f);
329 }
330
pn533_rx_frame_is_cmd_response(struct pn533 * dev,void * frame)331 bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
332 {
333 return (dev->ops->get_cmd_code(frame) ==
334 PN533_CMD_RESPONSE(dev->cmd->code));
335 }
336 EXPORT_SYMBOL_GPL(pn533_rx_frame_is_cmd_response);
337
338
339 static struct pn533_frame_ops pn533_std_frame_ops = {
340 .tx_frame_init = pn533_std_tx_frame_init,
341 .tx_frame_finish = pn533_std_tx_frame_finish,
342 .tx_update_payload_len = pn533_std_tx_update_payload_len,
343 .tx_header_len = PN533_STD_FRAME_HEADER_LEN,
344 .tx_tail_len = PN533_STD_FRAME_TAIL_LEN,
345
346 .rx_is_frame_valid = pn533_std_rx_frame_is_valid,
347 .rx_frame_size = pn533_std_rx_frame_size,
348 .rx_header_len = PN533_STD_FRAME_HEADER_LEN,
349 .rx_tail_len = PN533_STD_FRAME_TAIL_LEN,
350
351 .max_payload_len = PN533_STD_FRAME_MAX_PAYLOAD_LEN,
352 .get_cmd_code = pn533_std_get_cmd_code,
353 };
354
pn533_build_cmd_frame(struct pn533 * dev,u8 cmd_code,struct sk_buff * skb)355 static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
356 struct sk_buff *skb)
357 {
358 /* payload is already there, just update datalen */
359 int payload_len = skb->len;
360 struct pn533_frame_ops *ops = dev->ops;
361
362
363 skb_push(skb, ops->tx_header_len);
364 skb_put(skb, ops->tx_tail_len);
365
366 ops->tx_frame_init(skb->data, cmd_code);
367 ops->tx_update_payload_len(skb->data, payload_len);
368 ops->tx_frame_finish(skb->data);
369 }
370
pn533_send_async_complete(struct pn533 * dev)371 static int pn533_send_async_complete(struct pn533 *dev)
372 {
373 struct pn533_cmd *cmd = dev->cmd;
374 struct sk_buff *resp;
375 int status, rc = 0;
376
377 if (!cmd) {
378 dev_dbg(dev->dev, "%s: cmd not set\n", __func__);
379 goto done;
380 }
381
382 dev_kfree_skb(cmd->req);
383
384 status = cmd->status;
385 resp = cmd->resp;
386
387 if (status < 0) {
388 rc = cmd->complete_cb(dev, cmd->complete_cb_context,
389 ERR_PTR(status));
390 dev_kfree_skb(resp);
391 goto done;
392 }
393
394 /* when no response is set we got interrupted */
395 if (!resp)
396 resp = ERR_PTR(-EINTR);
397
398 if (!IS_ERR(resp)) {
399 skb_pull(resp, dev->ops->rx_header_len);
400 skb_trim(resp, resp->len - dev->ops->rx_tail_len);
401 }
402
403 rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
404
405 done:
406 kfree(cmd);
407 dev->cmd = NULL;
408 return rc;
409 }
410
__pn533_send_async(struct pn533 * dev,u8 cmd_code,struct sk_buff * req,pn533_send_async_complete_t complete_cb,void * complete_cb_context)411 static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
412 struct sk_buff *req,
413 pn533_send_async_complete_t complete_cb,
414 void *complete_cb_context)
415 {
416 struct pn533_cmd *cmd;
417 int rc = 0;
418
419 dev_dbg(dev->dev, "Sending command 0x%x\n", cmd_code);
420
421 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
422 if (!cmd)
423 return -ENOMEM;
424
425 cmd->code = cmd_code;
426 cmd->req = req;
427 cmd->complete_cb = complete_cb;
428 cmd->complete_cb_context = complete_cb_context;
429
430 pn533_build_cmd_frame(dev, cmd_code, req);
431
432 mutex_lock(&dev->cmd_lock);
433
434 if (!dev->cmd_pending) {
435 dev->cmd = cmd;
436 rc = dev->phy_ops->send_frame(dev, req);
437 if (rc) {
438 dev->cmd = NULL;
439 goto error;
440 }
441
442 dev->cmd_pending = 1;
443 goto unlock;
444 }
445
446 dev_dbg(dev->dev, "%s Queueing command 0x%x\n",
447 __func__, cmd_code);
448
449 INIT_LIST_HEAD(&cmd->queue);
450 list_add_tail(&cmd->queue, &dev->cmd_queue);
451
452 goto unlock;
453
454 error:
455 kfree(cmd);
456 unlock:
457 mutex_unlock(&dev->cmd_lock);
458 return rc;
459 }
460
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)461 static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
462 struct sk_buff *req,
463 pn533_send_async_complete_t complete_cb,
464 void *complete_cb_context)
465 {
466 int rc;
467
468 rc = __pn533_send_async(dev, cmd_code, req, complete_cb,
469 complete_cb_context);
470
471 return rc;
472 }
473
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)474 static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
475 struct sk_buff *req,
476 pn533_send_async_complete_t complete_cb,
477 void *complete_cb_context)
478 {
479 int rc;
480
481 rc = __pn533_send_async(dev, cmd_code, req, complete_cb,
482 complete_cb_context);
483
484 return rc;
485 }
486
487 /*
488 * pn533_send_cmd_direct_async
489 *
490 * The function sends a piority cmd directly to the chip omitting the cmd
491 * queue. It's intended to be used by chaining mechanism of received responses
492 * where the host has to request every single chunk of data before scheduling
493 * next cmd from the queue.
494 */
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)495 static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
496 struct sk_buff *req,
497 pn533_send_async_complete_t complete_cb,
498 void *complete_cb_context)
499 {
500 struct pn533_cmd *cmd;
501 int rc;
502
503 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
504 if (!cmd)
505 return -ENOMEM;
506
507 cmd->code = cmd_code;
508 cmd->req = req;
509 cmd->complete_cb = complete_cb;
510 cmd->complete_cb_context = complete_cb_context;
511
512 pn533_build_cmd_frame(dev, cmd_code, req);
513
514 dev->cmd = cmd;
515 rc = dev->phy_ops->send_frame(dev, req);
516 if (rc < 0) {
517 dev->cmd = NULL;
518 kfree(cmd);
519 }
520
521 return rc;
522 }
523
pn533_wq_cmd_complete(struct work_struct * work)524 static void pn533_wq_cmd_complete(struct work_struct *work)
525 {
526 struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
527 int rc;
528
529 rc = pn533_send_async_complete(dev);
530 if (rc != -EINPROGRESS)
531 queue_work(dev->wq, &dev->cmd_work);
532 }
533
pn533_wq_cmd(struct work_struct * work)534 static void pn533_wq_cmd(struct work_struct *work)
535 {
536 struct pn533 *dev = container_of(work, struct pn533, cmd_work);
537 struct pn533_cmd *cmd;
538 int rc;
539
540 mutex_lock(&dev->cmd_lock);
541
542 if (list_empty(&dev->cmd_queue)) {
543 dev->cmd_pending = 0;
544 mutex_unlock(&dev->cmd_lock);
545 return;
546 }
547
548 cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
549
550 list_del(&cmd->queue);
551
552 mutex_unlock(&dev->cmd_lock);
553
554 dev->cmd = cmd;
555 rc = dev->phy_ops->send_frame(dev, cmd->req);
556 if (rc < 0) {
557 dev->cmd = NULL;
558 dev_kfree_skb(cmd->req);
559 kfree(cmd);
560 return;
561 }
562
563 }
564
565 struct pn533_sync_cmd_response {
566 struct sk_buff *resp;
567 struct completion done;
568 };
569
pn533_send_sync_complete(struct pn533 * dev,void * _arg,struct sk_buff * resp)570 static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
571 struct sk_buff *resp)
572 {
573 struct pn533_sync_cmd_response *arg = _arg;
574
575 arg->resp = resp;
576 complete(&arg->done);
577
578 return 0;
579 }
580
581 /* pn533_send_cmd_sync
582 *
583 * Please note the req parameter is freed inside the function to
584 * limit a number of return value interpretations by the caller.
585 *
586 * 1. negative in case of error during TX path -> req should be freed
587 *
588 * 2. negative in case of error during RX path -> req should not be freed
589 * as it's been already freed at the beginning of RX path by
590 * async_complete_cb.
591 *
592 * 3. valid pointer in case of succesfult RX path
593 *
594 * A caller has to check a return value with IS_ERR macro. If the test pass,
595 * the returned pointer is valid.
596 *
597 */
pn533_send_cmd_sync(struct pn533 * dev,u8 cmd_code,struct sk_buff * req)598 static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
599 struct sk_buff *req)
600 {
601 int rc;
602 struct pn533_sync_cmd_response arg;
603
604 init_completion(&arg.done);
605
606 rc = pn533_send_cmd_async(dev, cmd_code, req,
607 pn533_send_sync_complete, &arg);
608 if (rc) {
609 dev_kfree_skb(req);
610 return ERR_PTR(rc);
611 }
612
613 wait_for_completion(&arg.done);
614
615 return arg.resp;
616 }
617
pn533_alloc_skb(struct pn533 * dev,unsigned int size)618 static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
619 {
620 struct sk_buff *skb;
621
622 skb = alloc_skb(dev->ops->tx_header_len +
623 size +
624 dev->ops->tx_tail_len, GFP_KERNEL);
625
626 if (skb)
627 skb_reserve(skb, dev->ops->tx_header_len);
628
629 return skb;
630 }
631
632 struct pn533_target_type_a {
633 __be16 sens_res;
634 u8 sel_res;
635 u8 nfcid_len;
636 u8 nfcid_data[];
637 } __packed;
638
639
640 #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
641 #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
642 #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
643
644 #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
645 #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
646
647 #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
648 #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
649
650 #define PN533_TYPE_A_SEL_PROT_MIFARE 0
651 #define PN533_TYPE_A_SEL_PROT_ISO14443 1
652 #define PN533_TYPE_A_SEL_PROT_DEP 2
653 #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
654
pn533_target_type_a_is_valid(struct pn533_target_type_a * type_a,int target_data_len)655 static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
656 int target_data_len)
657 {
658 u8 ssd;
659 u8 platconf;
660
661 if (target_data_len < sizeof(struct pn533_target_type_a))
662 return false;
663
664 /*
665 * The length check of nfcid[] and ats[] are not being performed because
666 * the values are not being used
667 */
668
669 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
670 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
671 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
672
673 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
674 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
675 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
676 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
677 return false;
678
679 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
680 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
681 return false;
682
683 return true;
684 }
685
pn533_target_found_type_a(struct nfc_target * nfc_tgt,u8 * tgt_data,int tgt_data_len)686 static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
687 int tgt_data_len)
688 {
689 struct pn533_target_type_a *tgt_type_a;
690
691 tgt_type_a = (struct pn533_target_type_a *)tgt_data;
692
693 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
694 return -EPROTO;
695
696 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
697 case PN533_TYPE_A_SEL_PROT_MIFARE:
698 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
699 break;
700 case PN533_TYPE_A_SEL_PROT_ISO14443:
701 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
702 break;
703 case PN533_TYPE_A_SEL_PROT_DEP:
704 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
705 break;
706 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
707 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
708 NFC_PROTO_NFC_DEP_MASK;
709 break;
710 }
711
712 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
713 nfc_tgt->sel_res = tgt_type_a->sel_res;
714 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
715 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
716
717 return 0;
718 }
719
720 struct pn533_target_felica {
721 u8 pol_res;
722 u8 opcode;
723 u8 nfcid2[NFC_NFCID2_MAXSIZE];
724 u8 pad[8];
725 /* optional */
726 u8 syst_code[];
727 } __packed;
728
729 #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
730 #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
731
pn533_target_felica_is_valid(struct pn533_target_felica * felica,int target_data_len)732 static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
733 int target_data_len)
734 {
735 if (target_data_len < sizeof(struct pn533_target_felica))
736 return false;
737
738 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
739 return false;
740
741 return true;
742 }
743
pn533_target_found_felica(struct nfc_target * nfc_tgt,u8 * tgt_data,int tgt_data_len)744 static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
745 int tgt_data_len)
746 {
747 struct pn533_target_felica *tgt_felica;
748
749 tgt_felica = (struct pn533_target_felica *)tgt_data;
750
751 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
752 return -EPROTO;
753
754 if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
755 (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
756 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
757 else
758 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
759
760 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
761 nfc_tgt->sensf_res_len = 9;
762
763 memcpy(nfc_tgt->nfcid2, tgt_felica->nfcid2, NFC_NFCID2_MAXSIZE);
764 nfc_tgt->nfcid2_len = NFC_NFCID2_MAXSIZE;
765
766 return 0;
767 }
768
769 struct pn533_target_jewel {
770 __be16 sens_res;
771 u8 jewelid[4];
772 } __packed;
773
pn533_target_jewel_is_valid(struct pn533_target_jewel * jewel,int target_data_len)774 static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
775 int target_data_len)
776 {
777 u8 ssd;
778 u8 platconf;
779
780 if (target_data_len < sizeof(struct pn533_target_jewel))
781 return false;
782
783 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
784 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
785 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
786
787 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
788 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
789 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
790 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
791 return false;
792
793 return true;
794 }
795
pn533_target_found_jewel(struct nfc_target * nfc_tgt,u8 * tgt_data,int tgt_data_len)796 static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
797 int tgt_data_len)
798 {
799 struct pn533_target_jewel *tgt_jewel;
800
801 tgt_jewel = (struct pn533_target_jewel *)tgt_data;
802
803 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
804 return -EPROTO;
805
806 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
807 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
808 nfc_tgt->nfcid1_len = 4;
809 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
810
811 return 0;
812 }
813
814 struct pn533_type_b_prot_info {
815 u8 bitrate;
816 u8 fsci_type;
817 u8 fwi_adc_fo;
818 } __packed;
819
820 #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
821 #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
822 #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
823
824 struct pn533_type_b_sens_res {
825 u8 opcode;
826 u8 nfcid[4];
827 u8 appdata[4];
828 struct pn533_type_b_prot_info prot_info;
829 } __packed;
830
831 #define PN533_TYPE_B_OPC_SENSB_RES 0x50
832
833 struct pn533_target_type_b {
834 struct pn533_type_b_sens_res sensb_res;
835 u8 attrib_res_len;
836 u8 attrib_res[];
837 } __packed;
838
pn533_target_type_b_is_valid(struct pn533_target_type_b * type_b,int target_data_len)839 static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
840 int target_data_len)
841 {
842 if (target_data_len < sizeof(struct pn533_target_type_b))
843 return false;
844
845 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
846 return false;
847
848 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
849 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
850 return false;
851
852 return true;
853 }
854
pn533_target_found_type_b(struct nfc_target * nfc_tgt,u8 * tgt_data,int tgt_data_len)855 static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
856 int tgt_data_len)
857 {
858 struct pn533_target_type_b *tgt_type_b;
859
860 tgt_type_b = (struct pn533_target_type_b *)tgt_data;
861
862 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
863 return -EPROTO;
864
865 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
866
867 return 0;
868 }
869
870 static void pn533_poll_reset_mod_list(struct pn533 *dev);
pn533_target_found(struct pn533 * dev,u8 tg,u8 * tgdata,int tgdata_len)871 static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
872 int tgdata_len)
873 {
874 struct nfc_target nfc_tgt;
875 int rc;
876
877 dev_dbg(dev->dev, "%s: modulation=%d\n",
878 __func__, dev->poll_mod_curr);
879
880 if (tg != 1)
881 return -EPROTO;
882
883 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
884
885 switch (dev->poll_mod_curr) {
886 case PN533_POLL_MOD_106KBPS_A:
887 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
888 break;
889 case PN533_POLL_MOD_212KBPS_FELICA:
890 case PN533_POLL_MOD_424KBPS_FELICA:
891 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
892 break;
893 case PN533_POLL_MOD_106KBPS_JEWEL:
894 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
895 break;
896 case PN533_POLL_MOD_847KBPS_B:
897 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
898 break;
899 default:
900 nfc_err(dev->dev,
901 "Unknown current poll modulation\n");
902 return -EPROTO;
903 }
904
905 if (rc)
906 return rc;
907
908 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
909 dev_dbg(dev->dev,
910 "The Tg found doesn't have the desired protocol\n");
911 return -EAGAIN;
912 }
913
914 dev_dbg(dev->dev,
915 "Target found - supported protocols: 0x%x\n",
916 nfc_tgt.supported_protocols);
917
918 dev->tgt_available_prots = nfc_tgt.supported_protocols;
919
920 pn533_poll_reset_mod_list(dev);
921 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
922
923 return 0;
924 }
925
pn533_poll_next_mod(struct pn533 * dev)926 static inline void pn533_poll_next_mod(struct pn533 *dev)
927 {
928 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
929 }
930
pn533_poll_reset_mod_list(struct pn533 * dev)931 static void pn533_poll_reset_mod_list(struct pn533 *dev)
932 {
933 dev->poll_mod_count = 0;
934 }
935
pn533_poll_add_mod(struct pn533 * dev,u8 mod_index)936 static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
937 {
938 dev->poll_mod_active[dev->poll_mod_count] =
939 (struct pn533_poll_modulations *)&poll_mod[mod_index];
940 dev->poll_mod_count++;
941 }
942
pn533_poll_create_mod_list(struct pn533 * dev,u32 im_protocols,u32 tm_protocols)943 static void pn533_poll_create_mod_list(struct pn533 *dev,
944 u32 im_protocols, u32 tm_protocols)
945 {
946 pn533_poll_reset_mod_list(dev);
947
948 if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
949 (im_protocols & NFC_PROTO_ISO14443_MASK) ||
950 (im_protocols & NFC_PROTO_NFC_DEP_MASK))
951 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
952
953 if (im_protocols & NFC_PROTO_FELICA_MASK ||
954 im_protocols & NFC_PROTO_NFC_DEP_MASK) {
955 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
956 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
957 }
958
959 if (im_protocols & NFC_PROTO_JEWEL_MASK)
960 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
961
962 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
963 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
964
965 if (tm_protocols)
966 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
967 }
968
pn533_start_poll_complete(struct pn533 * dev,struct sk_buff * resp)969 static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
970 {
971 u8 nbtg, tg, *tgdata;
972 int rc, tgdata_len;
973
974 /* Toggle the DEP polling */
975 if (dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK)
976 dev->poll_dep = 1;
977
978 nbtg = resp->data[0];
979 tg = resp->data[1];
980 tgdata = &resp->data[2];
981 tgdata_len = resp->len - 2; /* nbtg + tg */
982
983 if (nbtg) {
984 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
985
986 /* We must stop the poll after a valid target found */
987 if (rc == 0)
988 return 0;
989 }
990
991 return -EAGAIN;
992 }
993
pn533_alloc_poll_tg_frame(struct pn533 * dev)994 static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
995 {
996 struct sk_buff *skb;
997 u8 *felica, *nfcid3;
998
999 u8 *gbytes = dev->gb;
1000 size_t gbytes_len = dev->gb_len;
1001
1002 u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1003 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1004 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1005 0xff, 0xff}; /* System code */
1006
1007 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1008 0x0, 0x0, 0x0,
1009 0x40}; /* SEL_RES for DEP */
1010
1011 unsigned int skb_len = 36 + /*
1012 * mode (1), mifare (6),
1013 * felica (18), nfcid3 (10), gb_len (1)
1014 */
1015 gbytes_len +
1016 1; /* len Tk*/
1017
1018 skb = pn533_alloc_skb(dev, skb_len);
1019 if (!skb)
1020 return NULL;
1021
1022 /* DEP support only */
1023 skb_put_u8(skb, PN533_INIT_TARGET_DEP);
1024
1025 /* MIFARE params */
1026 skb_put_data(skb, mifare_params, 6);
1027
1028 /* Felica params */
1029 felica = skb_put_data(skb, felica_params, 18);
1030 get_random_bytes(felica + 2, 6);
1031
1032 /* NFCID3 */
1033 nfcid3 = skb_put_zero(skb, 10);
1034 memcpy(nfcid3, felica, 8);
1035
1036 /* General bytes */
1037 skb_put_u8(skb, gbytes_len);
1038
1039 skb_put_data(skb, gbytes, gbytes_len);
1040
1041 /* Len Tk */
1042 skb_put_u8(skb, 0);
1043
1044 return skb;
1045 }
1046
1047 static void pn533_wq_tm_mi_recv(struct work_struct *work);
1048 static struct sk_buff *pn533_build_response(struct pn533 *dev);
1049
pn533_tm_get_data_complete(struct pn533 * dev,void * arg,struct sk_buff * resp)1050 static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
1051 struct sk_buff *resp)
1052 {
1053 struct sk_buff *skb;
1054 u8 status, ret, mi;
1055 int rc;
1056
1057 dev_dbg(dev->dev, "%s\n", __func__);
1058
1059 if (IS_ERR(resp)) {
1060 skb_queue_purge(&dev->resp_q);
1061 return PTR_ERR(resp);
1062 }
1063
1064 status = resp->data[0];
1065
1066 ret = status & PN533_CMD_RET_MASK;
1067 mi = status & PN533_CMD_MI_MASK;
1068
1069 skb_pull(resp, sizeof(status));
1070
1071 if (ret != PN533_CMD_RET_SUCCESS) {
1072 rc = -EIO;
1073 goto error;
1074 }
1075
1076 skb_queue_tail(&dev->resp_q, resp);
1077
1078 if (mi) {
1079 queue_work(dev->wq, &dev->mi_tm_rx_work);
1080 return -EINPROGRESS;
1081 }
1082
1083 skb = pn533_build_response(dev);
1084 if (!skb) {
1085 rc = -EIO;
1086 goto error;
1087 }
1088
1089 return nfc_tm_data_received(dev->nfc_dev, skb);
1090
1091 error:
1092 nfc_tm_deactivated(dev->nfc_dev);
1093 dev->tgt_mode = 0;
1094 skb_queue_purge(&dev->resp_q);
1095 dev_kfree_skb(resp);
1096
1097 return rc;
1098 }
1099
pn533_wq_tm_mi_recv(struct work_struct * work)1100 static void pn533_wq_tm_mi_recv(struct work_struct *work)
1101 {
1102 struct pn533 *dev = container_of(work, struct pn533, mi_tm_rx_work);
1103 struct sk_buff *skb;
1104 int rc;
1105
1106 dev_dbg(dev->dev, "%s\n", __func__);
1107
1108 skb = pn533_alloc_skb(dev, 0);
1109 if (!skb)
1110 return;
1111
1112 rc = pn533_send_cmd_direct_async(dev,
1113 PN533_CMD_TG_GET_DATA,
1114 skb,
1115 pn533_tm_get_data_complete,
1116 NULL);
1117
1118 if (rc < 0)
1119 dev_kfree_skb(skb);
1120 }
1121
1122 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
1123 struct sk_buff *resp);
pn533_wq_tm_mi_send(struct work_struct * work)1124 static void pn533_wq_tm_mi_send(struct work_struct *work)
1125 {
1126 struct pn533 *dev = container_of(work, struct pn533, mi_tm_tx_work);
1127 struct sk_buff *skb;
1128 int rc;
1129
1130 dev_dbg(dev->dev, "%s\n", __func__);
1131
1132 /* Grab the first skb in the queue */
1133 skb = skb_dequeue(&dev->fragment_skb);
1134 if (skb == NULL) { /* No more data */
1135 /* Reset the queue for future use */
1136 skb_queue_head_init(&dev->fragment_skb);
1137 goto error;
1138 }
1139
1140 /* last entry - remove MI bit */
1141 if (skb_queue_len(&dev->fragment_skb) == 0) {
1142 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_TG_SET_DATA,
1143 skb, pn533_tm_send_complete, NULL);
1144 } else
1145 rc = pn533_send_cmd_direct_async(dev,
1146 PN533_CMD_TG_SET_META_DATA,
1147 skb, pn533_tm_send_complete, NULL);
1148
1149 if (rc == 0) /* success */
1150 return;
1151
1152 dev_err(dev->dev,
1153 "Error %d when trying to perform set meta data_exchange", rc);
1154
1155 dev_kfree_skb(skb);
1156
1157 error:
1158 dev->phy_ops->send_ack(dev, GFP_KERNEL);
1159 queue_work(dev->wq, &dev->cmd_work);
1160 }
1161
pn533_wq_tg_get_data(struct work_struct * work)1162 static void pn533_wq_tg_get_data(struct work_struct *work)
1163 {
1164 struct pn533 *dev = container_of(work, struct pn533, tg_work);
1165 struct sk_buff *skb;
1166 int rc;
1167
1168 dev_dbg(dev->dev, "%s\n", __func__);
1169
1170 skb = pn533_alloc_skb(dev, 0);
1171 if (!skb)
1172 return;
1173
1174 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1175 pn533_tm_get_data_complete, NULL);
1176
1177 if (rc < 0)
1178 dev_kfree_skb(skb);
1179 }
1180
1181 #define ATR_REQ_GB_OFFSET 17
pn533_init_target_complete(struct pn533 * dev,struct sk_buff * resp)1182 static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
1183 {
1184 u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
1185 size_t gb_len;
1186 int rc;
1187
1188 dev_dbg(dev->dev, "%s\n", __func__);
1189
1190 if (resp->len < ATR_REQ_GB_OFFSET + 1)
1191 return -EINVAL;
1192
1193 mode = resp->data[0];
1194 cmd = &resp->data[1];
1195
1196 dev_dbg(dev->dev, "Target mode 0x%x len %d\n",
1197 mode, resp->len);
1198
1199 if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1200 PN533_INIT_TARGET_RESP_ACTIVE)
1201 comm_mode = NFC_COMM_ACTIVE;
1202
1203 if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */
1204 return -EOPNOTSUPP;
1205
1206 gb = cmd + ATR_REQ_GB_OFFSET;
1207 gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
1208
1209 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1210 comm_mode, gb, gb_len);
1211 if (rc < 0) {
1212 nfc_err(dev->dev,
1213 "Error when signaling target activation\n");
1214 return rc;
1215 }
1216
1217 dev->tgt_mode = 1;
1218 queue_work(dev->wq, &dev->tg_work);
1219
1220 return 0;
1221 }
1222
pn533_listen_mode_timer(struct timer_list * t)1223 static void pn533_listen_mode_timer(struct timer_list *t)
1224 {
1225 struct pn533 *dev = from_timer(dev, t, listen_timer);
1226
1227 dev_dbg(dev->dev, "Listen mode timeout\n");
1228
1229 dev->cancel_listen = 1;
1230
1231 pn533_poll_next_mod(dev);
1232
1233 queue_delayed_work(dev->wq, &dev->poll_work,
1234 msecs_to_jiffies(PN533_POLL_INTERVAL));
1235 }
1236
pn533_rf_complete(struct pn533 * dev,void * arg,struct sk_buff * resp)1237 static int pn533_rf_complete(struct pn533 *dev, void *arg,
1238 struct sk_buff *resp)
1239 {
1240 int rc = 0;
1241
1242 dev_dbg(dev->dev, "%s\n", __func__);
1243
1244 if (IS_ERR(resp)) {
1245 rc = PTR_ERR(resp);
1246
1247 nfc_err(dev->dev, "RF setting error %d\n", rc);
1248
1249 return rc;
1250 }
1251
1252 queue_delayed_work(dev->wq, &dev->poll_work,
1253 msecs_to_jiffies(PN533_POLL_INTERVAL));
1254
1255 dev_kfree_skb(resp);
1256 return rc;
1257 }
1258
pn533_wq_rf(struct work_struct * work)1259 static void pn533_wq_rf(struct work_struct *work)
1260 {
1261 struct pn533 *dev = container_of(work, struct pn533, rf_work);
1262 struct sk_buff *skb;
1263 int rc;
1264
1265 dev_dbg(dev->dev, "%s\n", __func__);
1266
1267 skb = pn533_alloc_skb(dev, 2);
1268 if (!skb)
1269 return;
1270
1271 skb_put_u8(skb, PN533_CFGITEM_RF_FIELD);
1272 skb_put_u8(skb, PN533_CFGITEM_RF_FIELD_AUTO_RFCA);
1273
1274 rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb,
1275 pn533_rf_complete, NULL);
1276 if (rc < 0) {
1277 dev_kfree_skb(skb);
1278 nfc_err(dev->dev, "RF setting error %d\n", rc);
1279 }
1280 }
1281
pn533_poll_dep_complete(struct pn533 * dev,void * arg,struct sk_buff * resp)1282 static int pn533_poll_dep_complete(struct pn533 *dev, void *arg,
1283 struct sk_buff *resp)
1284 {
1285 struct pn533_cmd_jump_dep_response *rsp;
1286 struct nfc_target nfc_target;
1287 u8 target_gt_len;
1288 int rc;
1289
1290 if (IS_ERR(resp))
1291 return PTR_ERR(resp);
1292
1293 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1294
1295 rc = rsp->status & PN533_CMD_RET_MASK;
1296 if (rc != PN533_CMD_RET_SUCCESS) {
1297 /* Not target found, turn radio off */
1298 queue_work(dev->wq, &dev->rf_work);
1299
1300 dev_kfree_skb(resp);
1301 return 0;
1302 }
1303
1304 dev_dbg(dev->dev, "Creating new target");
1305
1306 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1307 nfc_target.nfcid1_len = 10;
1308 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
1309 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1310 if (rc)
1311 goto error;
1312
1313 dev->tgt_available_prots = 0;
1314 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1315
1316 /* ATR_RES general bytes are located at offset 17 */
1317 target_gt_len = resp->len - 17;
1318 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1319 rsp->gt, target_gt_len);
1320 if (!rc) {
1321 rc = nfc_dep_link_is_up(dev->nfc_dev,
1322 dev->nfc_dev->targets[0].idx,
1323 0, NFC_RF_INITIATOR);
1324
1325 if (!rc)
1326 pn533_poll_reset_mod_list(dev);
1327 }
1328 error:
1329 dev_kfree_skb(resp);
1330 return rc;
1331 }
1332
1333 #define PASSIVE_DATA_LEN 5
pn533_poll_dep(struct nfc_dev * nfc_dev)1334 static int pn533_poll_dep(struct nfc_dev *nfc_dev)
1335 {
1336 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1337 struct sk_buff *skb;
1338 int rc, skb_len;
1339 u8 *next, nfcid3[NFC_NFCID3_MAXSIZE];
1340 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
1341
1342 dev_dbg(dev->dev, "%s", __func__);
1343
1344 if (!dev->gb) {
1345 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1346
1347 if (!dev->gb || !dev->gb_len) {
1348 dev->poll_dep = 0;
1349 queue_work(dev->wq, &dev->rf_work);
1350 }
1351 }
1352
1353 skb_len = 3 + dev->gb_len; /* ActPass + BR + Next */
1354 skb_len += PASSIVE_DATA_LEN;
1355
1356 /* NFCID3 */
1357 skb_len += NFC_NFCID3_MAXSIZE;
1358 nfcid3[0] = 0x1;
1359 nfcid3[1] = 0xfe;
1360 get_random_bytes(nfcid3 + 2, 6);
1361
1362 skb = pn533_alloc_skb(dev, skb_len);
1363 if (!skb)
1364 return -ENOMEM;
1365
1366 skb_put_u8(skb, 0x01); /* Active */
1367 skb_put_u8(skb, 0x02); /* 424 kbps */
1368
1369 next = skb_put(skb, 1); /* Next */
1370 *next = 0;
1371
1372 /* Copy passive data */
1373 skb_put_data(skb, passive_data, PASSIVE_DATA_LEN);
1374 *next |= 1;
1375
1376 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
1377 skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE);
1378 *next |= 2;
1379
1380 skb_put_data(skb, dev->gb, dev->gb_len);
1381 *next |= 4; /* We have some Gi */
1382
1383 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
1384 pn533_poll_dep_complete, NULL);
1385
1386 if (rc < 0)
1387 dev_kfree_skb(skb);
1388
1389 return rc;
1390 }
1391
pn533_poll_complete(struct pn533 * dev,void * arg,struct sk_buff * resp)1392 static int pn533_poll_complete(struct pn533 *dev, void *arg,
1393 struct sk_buff *resp)
1394 {
1395 struct pn533_poll_modulations *cur_mod;
1396 int rc;
1397
1398 dev_dbg(dev->dev, "%s\n", __func__);
1399
1400 if (IS_ERR(resp)) {
1401 rc = PTR_ERR(resp);
1402
1403 nfc_err(dev->dev, "%s Poll complete error %d\n",
1404 __func__, rc);
1405
1406 if (rc == -ENOENT) {
1407 if (dev->poll_mod_count != 0)
1408 return rc;
1409 goto stop_poll;
1410 } else if (rc < 0) {
1411 nfc_err(dev->dev,
1412 "Error %d when running poll\n", rc);
1413 goto stop_poll;
1414 }
1415 }
1416
1417 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1418
1419 if (cur_mod->len == 0) { /* Target mode */
1420 del_timer(&dev->listen_timer);
1421 rc = pn533_init_target_complete(dev, resp);
1422 goto done;
1423 }
1424
1425 /* Initiator mode */
1426 rc = pn533_start_poll_complete(dev, resp);
1427 if (!rc)
1428 goto done;
1429
1430 if (!dev->poll_mod_count) {
1431 dev_dbg(dev->dev, "Polling has been stopped\n");
1432 goto done;
1433 }
1434
1435 pn533_poll_next_mod(dev);
1436 /* Not target found, turn radio off */
1437 queue_work(dev->wq, &dev->rf_work);
1438
1439 done:
1440 dev_kfree_skb(resp);
1441 return rc;
1442
1443 stop_poll:
1444 nfc_err(dev->dev, "Polling operation has been stopped\n");
1445
1446 pn533_poll_reset_mod_list(dev);
1447 dev->poll_protocols = 0;
1448 return rc;
1449 }
1450
pn533_alloc_poll_in_frame(struct pn533 * dev,struct pn533_poll_modulations * mod)1451 static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1452 struct pn533_poll_modulations *mod)
1453 {
1454 struct sk_buff *skb;
1455
1456 skb = pn533_alloc_skb(dev, mod->len);
1457 if (!skb)
1458 return NULL;
1459
1460 skb_put_data(skb, &mod->data, mod->len);
1461
1462 return skb;
1463 }
1464
pn533_send_poll_frame(struct pn533 * dev)1465 static int pn533_send_poll_frame(struct pn533 *dev)
1466 {
1467 struct pn533_poll_modulations *mod;
1468 struct sk_buff *skb;
1469 int rc;
1470 u8 cmd_code;
1471
1472 mod = dev->poll_mod_active[dev->poll_mod_curr];
1473
1474 dev_dbg(dev->dev, "%s mod len %d\n",
1475 __func__, mod->len);
1476
1477 if ((dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK) && dev->poll_dep) {
1478 dev->poll_dep = 0;
1479 return pn533_poll_dep(dev->nfc_dev);
1480 }
1481
1482 if (mod->len == 0) { /* Listen mode */
1483 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
1484 skb = pn533_alloc_poll_tg_frame(dev);
1485 } else { /* Polling mode */
1486 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
1487 skb = pn533_alloc_poll_in_frame(dev, mod);
1488 }
1489
1490 if (!skb) {
1491 nfc_err(dev->dev, "Failed to allocate skb\n");
1492 return -ENOMEM;
1493 }
1494
1495 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1496 NULL);
1497 if (rc < 0) {
1498 dev_kfree_skb(skb);
1499 nfc_err(dev->dev, "Polling loop error %d\n", rc);
1500 }
1501
1502 return rc;
1503 }
1504
pn533_wq_poll(struct work_struct * work)1505 static void pn533_wq_poll(struct work_struct *work)
1506 {
1507 struct pn533 *dev = container_of(work, struct pn533, poll_work.work);
1508 struct pn533_poll_modulations *cur_mod;
1509 int rc;
1510
1511 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1512
1513 dev_dbg(dev->dev,
1514 "%s cancel_listen %d modulation len %d\n",
1515 __func__, dev->cancel_listen, cur_mod->len);
1516
1517 if (dev->cancel_listen == 1) {
1518 dev->cancel_listen = 0;
1519 dev->phy_ops->abort_cmd(dev, GFP_ATOMIC);
1520 }
1521
1522 rc = pn533_send_poll_frame(dev);
1523 if (rc)
1524 return;
1525
1526 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1527 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1528 }
1529
pn533_start_poll(struct nfc_dev * nfc_dev,u32 im_protocols,u32 tm_protocols)1530 static int pn533_start_poll(struct nfc_dev *nfc_dev,
1531 u32 im_protocols, u32 tm_protocols)
1532 {
1533 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1534 struct pn533_poll_modulations *cur_mod;
1535 u8 rand_mod;
1536 int rc;
1537
1538 dev_dbg(dev->dev,
1539 "%s: im protocols 0x%x tm protocols 0x%x\n",
1540 __func__, im_protocols, tm_protocols);
1541
1542 if (dev->tgt_active_prot) {
1543 nfc_err(dev->dev,
1544 "Cannot poll with a target already activated\n");
1545 return -EBUSY;
1546 }
1547
1548 if (dev->tgt_mode) {
1549 nfc_err(dev->dev,
1550 "Cannot poll while already being activated\n");
1551 return -EBUSY;
1552 }
1553
1554 if (tm_protocols) {
1555 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1556 if (dev->gb == NULL)
1557 tm_protocols = 0;
1558 }
1559
1560 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1561 dev->poll_protocols = im_protocols;
1562 dev->listen_protocols = tm_protocols;
1563
1564 /* Do not always start polling from the same modulation */
1565 get_random_bytes(&rand_mod, sizeof(rand_mod));
1566 rand_mod %= dev->poll_mod_count;
1567 dev->poll_mod_curr = rand_mod;
1568
1569 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1570
1571 rc = pn533_send_poll_frame(dev);
1572
1573 /* Start listen timer */
1574 if (!rc && cur_mod->len == 0 && dev->poll_mod_count > 1)
1575 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1576
1577 return rc;
1578 }
1579
pn533_stop_poll(struct nfc_dev * nfc_dev)1580 static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1581 {
1582 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1583
1584 del_timer(&dev->listen_timer);
1585
1586 if (!dev->poll_mod_count) {
1587 dev_dbg(dev->dev,
1588 "Polling operation was not running\n");
1589 return;
1590 }
1591
1592 dev->phy_ops->abort_cmd(dev, GFP_KERNEL);
1593 flush_delayed_work(&dev->poll_work);
1594 pn533_poll_reset_mod_list(dev);
1595 }
1596
pn533_activate_target_nfcdep(struct pn533 * dev)1597 static int pn533_activate_target_nfcdep(struct pn533 *dev)
1598 {
1599 struct pn533_cmd_activate_response *rsp;
1600 u16 gt_len;
1601 int rc;
1602 struct sk_buff *skb;
1603 struct sk_buff *resp;
1604
1605 dev_dbg(dev->dev, "%s\n", __func__);
1606
1607 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
1608 if (!skb)
1609 return -ENOMEM;
1610
1611 skb_put_u8(skb, 1); /* TG */
1612 skb_put_u8(skb, 0); /* Next */
1613
1614 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1615 if (IS_ERR(resp))
1616 return PTR_ERR(resp);
1617
1618 rsp = (struct pn533_cmd_activate_response *)resp->data;
1619 rc = rsp->status & PN533_CMD_RET_MASK;
1620 if (rc != PN533_CMD_RET_SUCCESS) {
1621 nfc_err(dev->dev,
1622 "Target activation failed (error 0x%x)\n", rc);
1623 dev_kfree_skb(resp);
1624 return -EIO;
1625 }
1626
1627 /* ATR_RES general bytes are located at offset 16 */
1628 gt_len = resp->len - 16;
1629 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
1630
1631 dev_kfree_skb(resp);
1632 return rc;
1633 }
1634
pn533_activate_target(struct nfc_dev * nfc_dev,struct nfc_target * target,u32 protocol)1635 static int pn533_activate_target(struct nfc_dev *nfc_dev,
1636 struct nfc_target *target, u32 protocol)
1637 {
1638 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1639 int rc;
1640
1641 dev_dbg(dev->dev, "%s: protocol=%u\n", __func__, protocol);
1642
1643 if (dev->poll_mod_count) {
1644 nfc_err(dev->dev,
1645 "Cannot activate while polling\n");
1646 return -EBUSY;
1647 }
1648
1649 if (dev->tgt_active_prot) {
1650 nfc_err(dev->dev,
1651 "There is already an active target\n");
1652 return -EBUSY;
1653 }
1654
1655 if (!dev->tgt_available_prots) {
1656 nfc_err(dev->dev,
1657 "There is no available target to activate\n");
1658 return -EINVAL;
1659 }
1660
1661 if (!(dev->tgt_available_prots & (1 << protocol))) {
1662 nfc_err(dev->dev,
1663 "Target doesn't support requested proto %u\n",
1664 protocol);
1665 return -EINVAL;
1666 }
1667
1668 if (protocol == NFC_PROTO_NFC_DEP) {
1669 rc = pn533_activate_target_nfcdep(dev);
1670 if (rc) {
1671 nfc_err(dev->dev,
1672 "Activating target with DEP failed %d\n", rc);
1673 return rc;
1674 }
1675 }
1676
1677 dev->tgt_active_prot = protocol;
1678 dev->tgt_available_prots = 0;
1679
1680 return 0;
1681 }
1682
pn533_deactivate_target_complete(struct pn533 * dev,void * arg,struct sk_buff * resp)1683 static int pn533_deactivate_target_complete(struct pn533 *dev, void *arg,
1684 struct sk_buff *resp)
1685 {
1686 int rc = 0;
1687
1688 dev_dbg(dev->dev, "%s\n", __func__);
1689
1690 if (IS_ERR(resp)) {
1691 rc = PTR_ERR(resp);
1692
1693 nfc_err(dev->dev, "Target release error %d\n", rc);
1694
1695 return rc;
1696 }
1697
1698 rc = resp->data[0] & PN533_CMD_RET_MASK;
1699 if (rc != PN533_CMD_RET_SUCCESS)
1700 nfc_err(dev->dev,
1701 "Error 0x%x when releasing the target\n", rc);
1702
1703 dev_kfree_skb(resp);
1704 return rc;
1705 }
1706
pn533_deactivate_target(struct nfc_dev * nfc_dev,struct nfc_target * target,u8 mode)1707 static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1708 struct nfc_target *target, u8 mode)
1709 {
1710 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1711 struct sk_buff *skb;
1712 int rc;
1713
1714 dev_dbg(dev->dev, "%s\n", __func__);
1715
1716 if (!dev->tgt_active_prot) {
1717 nfc_err(dev->dev, "There is no active target\n");
1718 return;
1719 }
1720
1721 dev->tgt_active_prot = 0;
1722 skb_queue_purge(&dev->resp_q);
1723
1724 skb = pn533_alloc_skb(dev, sizeof(u8));
1725 if (!skb)
1726 return;
1727
1728 skb_put_u8(skb, 1); /* TG*/
1729
1730 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_RELEASE, skb,
1731 pn533_deactivate_target_complete, NULL);
1732 if (rc < 0) {
1733 dev_kfree_skb(skb);
1734 nfc_err(dev->dev, "Target release error %d\n", rc);
1735 }
1736 }
1737
1738
pn533_in_dep_link_up_complete(struct pn533 * dev,void * arg,struct sk_buff * resp)1739 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
1740 struct sk_buff *resp)
1741 {
1742 struct pn533_cmd_jump_dep_response *rsp;
1743 u8 target_gt_len;
1744 int rc;
1745 u8 active = *(u8 *)arg;
1746
1747 kfree(arg);
1748
1749 if (IS_ERR(resp))
1750 return PTR_ERR(resp);
1751
1752 if (dev->tgt_available_prots &&
1753 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1754 nfc_err(dev->dev,
1755 "The target does not support DEP\n");
1756 rc = -EINVAL;
1757 goto error;
1758 }
1759
1760 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1761
1762 rc = rsp->status & PN533_CMD_RET_MASK;
1763 if (rc != PN533_CMD_RET_SUCCESS) {
1764 nfc_err(dev->dev,
1765 "Bringing DEP link up failed (error 0x%x)\n", rc);
1766 goto error;
1767 }
1768
1769 if (!dev->tgt_available_prots) {
1770 struct nfc_target nfc_target;
1771
1772 dev_dbg(dev->dev, "Creating new target\n");
1773
1774 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1775 nfc_target.nfcid1_len = 10;
1776 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
1777 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1778 if (rc)
1779 goto error;
1780
1781 dev->tgt_available_prots = 0;
1782 }
1783
1784 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1785
1786 /* ATR_RES general bytes are located at offset 17 */
1787 target_gt_len = resp->len - 17;
1788 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1789 rsp->gt, target_gt_len);
1790 if (rc == 0)
1791 rc = nfc_dep_link_is_up(dev->nfc_dev,
1792 dev->nfc_dev->targets[0].idx,
1793 !active, NFC_RF_INITIATOR);
1794
1795 error:
1796 dev_kfree_skb(resp);
1797 return rc;
1798 }
1799
1800 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)1801 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
1802 u8 comm_mode, u8 *gb, size_t gb_len)
1803 {
1804 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1805 struct sk_buff *skb;
1806 int rc, skb_len;
1807 u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE];
1808 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
1809
1810 dev_dbg(dev->dev, "%s\n", __func__);
1811
1812 if (dev->poll_mod_count) {
1813 nfc_err(dev->dev,
1814 "Cannot bring the DEP link up while polling\n");
1815 return -EBUSY;
1816 }
1817
1818 if (dev->tgt_active_prot) {
1819 nfc_err(dev->dev,
1820 "There is already an active target\n");
1821 return -EBUSY;
1822 }
1823
1824 skb_len = 3 + gb_len; /* ActPass + BR + Next */
1825 skb_len += PASSIVE_DATA_LEN;
1826
1827 /* NFCID3 */
1828 skb_len += NFC_NFCID3_MAXSIZE;
1829 if (target && !target->nfcid2_len) {
1830 nfcid3[0] = 0x1;
1831 nfcid3[1] = 0xfe;
1832 get_random_bytes(nfcid3 + 2, 6);
1833 }
1834
1835 skb = pn533_alloc_skb(dev, skb_len);
1836 if (!skb)
1837 return -ENOMEM;
1838
1839 skb_put_u8(skb, !comm_mode); /* ActPass */
1840 skb_put_u8(skb, 0x02); /* 424 kbps */
1841
1842 next = skb_put(skb, 1); /* Next */
1843 *next = 0;
1844
1845 /* Copy passive data */
1846 skb_put_data(skb, passive_data, PASSIVE_DATA_LEN);
1847 *next |= 1;
1848
1849 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
1850 if (target && target->nfcid2_len)
1851 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2,
1852 target->nfcid2_len);
1853 else
1854 skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE);
1855 *next |= 2;
1856
1857 if (gb != NULL && gb_len > 0) {
1858 skb_put_data(skb, gb, gb_len);
1859 *next |= 4; /* We have some Gi */
1860 } else {
1861 *next = 0;
1862 }
1863
1864 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
1865 if (!arg) {
1866 dev_kfree_skb(skb);
1867 return -ENOMEM;
1868 }
1869
1870 *arg = !comm_mode;
1871
1872 pn533_rf_field(dev->nfc_dev, 0);
1873
1874 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
1875 pn533_in_dep_link_up_complete, arg);
1876
1877 if (rc < 0) {
1878 dev_kfree_skb(skb);
1879 kfree(arg);
1880 }
1881
1882 return rc;
1883 }
1884
pn533_dep_link_down(struct nfc_dev * nfc_dev)1885 static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
1886 {
1887 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1888
1889 dev_dbg(dev->dev, "%s\n", __func__);
1890
1891 pn533_poll_reset_mod_list(dev);
1892
1893 if (dev->tgt_mode || dev->tgt_active_prot)
1894 dev->phy_ops->abort_cmd(dev, GFP_KERNEL);
1895
1896 dev->tgt_active_prot = 0;
1897 dev->tgt_mode = 0;
1898
1899 skb_queue_purge(&dev->resp_q);
1900
1901 return 0;
1902 }
1903
1904 struct pn533_data_exchange_arg {
1905 data_exchange_cb_t cb;
1906 void *cb_context;
1907 };
1908
pn533_build_response(struct pn533 * dev)1909 static struct sk_buff *pn533_build_response(struct pn533 *dev)
1910 {
1911 struct sk_buff *skb, *tmp, *t;
1912 unsigned int skb_len = 0, tmp_len = 0;
1913
1914 dev_dbg(dev->dev, "%s\n", __func__);
1915
1916 if (skb_queue_empty(&dev->resp_q))
1917 return NULL;
1918
1919 if (skb_queue_len(&dev->resp_q) == 1) {
1920 skb = skb_dequeue(&dev->resp_q);
1921 goto out;
1922 }
1923
1924 skb_queue_walk_safe(&dev->resp_q, tmp, t)
1925 skb_len += tmp->len;
1926
1927 dev_dbg(dev->dev, "%s total length %d\n",
1928 __func__, skb_len);
1929
1930 skb = alloc_skb(skb_len, GFP_KERNEL);
1931 if (skb == NULL)
1932 goto out;
1933
1934 skb_put(skb, skb_len);
1935
1936 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
1937 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
1938 tmp_len += tmp->len;
1939 }
1940
1941 out:
1942 skb_queue_purge(&dev->resp_q);
1943
1944 return skb;
1945 }
1946
pn533_data_exchange_complete(struct pn533 * dev,void * _arg,struct sk_buff * resp)1947 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
1948 struct sk_buff *resp)
1949 {
1950 struct pn533_data_exchange_arg *arg = _arg;
1951 struct sk_buff *skb;
1952 int rc = 0;
1953 u8 status, ret, mi;
1954
1955 dev_dbg(dev->dev, "%s\n", __func__);
1956
1957 if (IS_ERR(resp)) {
1958 rc = PTR_ERR(resp);
1959 goto _error;
1960 }
1961
1962 status = resp->data[0];
1963 ret = status & PN533_CMD_RET_MASK;
1964 mi = status & PN533_CMD_MI_MASK;
1965
1966 skb_pull(resp, sizeof(status));
1967
1968 if (ret != PN533_CMD_RET_SUCCESS) {
1969 nfc_err(dev->dev,
1970 "Exchanging data failed (error 0x%x)\n", ret);
1971 rc = -EIO;
1972 goto error;
1973 }
1974
1975 skb_queue_tail(&dev->resp_q, resp);
1976
1977 if (mi) {
1978 dev->cmd_complete_mi_arg = arg;
1979 queue_work(dev->wq, &dev->mi_rx_work);
1980 return -EINPROGRESS;
1981 }
1982
1983 /* Prepare for the next round */
1984 if (skb_queue_len(&dev->fragment_skb) > 0) {
1985 dev->cmd_complete_dep_arg = arg;
1986 queue_work(dev->wq, &dev->mi_tx_work);
1987
1988 return -EINPROGRESS;
1989 }
1990
1991 skb = pn533_build_response(dev);
1992 if (!skb) {
1993 rc = -ENOMEM;
1994 goto error;
1995 }
1996
1997 arg->cb(arg->cb_context, skb, 0);
1998 kfree(arg);
1999 return 0;
2000
2001 error:
2002 dev_kfree_skb(resp);
2003 _error:
2004 skb_queue_purge(&dev->resp_q);
2005 arg->cb(arg->cb_context, NULL, rc);
2006 kfree(arg);
2007 return rc;
2008 }
2009
2010 /*
2011 * Receive an incoming pn533 frame. skb contains only header and payload.
2012 * If skb == NULL, it is a notification that the link below is dead.
2013 */
pn533_recv_frame(struct pn533 * dev,struct sk_buff * skb,int status)2014 void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status)
2015 {
2016 if (!dev->cmd)
2017 goto sched_wq;
2018
2019 dev->cmd->status = status;
2020
2021 if (status != 0) {
2022 dev_dbg(dev->dev, "%s: Error received: %d\n", __func__, status);
2023 goto sched_wq;
2024 }
2025
2026 if (skb == NULL) {
2027 pr_err("NULL Frame -> link is dead\n");
2028 goto sched_wq;
2029 }
2030
2031 if (pn533_rx_frame_is_ack(skb->data)) {
2032 dev_dbg(dev->dev, "%s: Received ACK frame\n", __func__);
2033 dev_kfree_skb(skb);
2034 return;
2035 }
2036
2037 print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, skb->data,
2038 dev->ops->rx_frame_size(skb->data), false);
2039
2040 if (!dev->ops->rx_is_frame_valid(skb->data, dev)) {
2041 nfc_err(dev->dev, "Received an invalid frame\n");
2042 dev->cmd->status = -EIO;
2043 } else if (!pn533_rx_frame_is_cmd_response(dev, skb->data)) {
2044 nfc_err(dev->dev, "It it not the response to the last command\n");
2045 dev->cmd->status = -EIO;
2046 }
2047
2048 dev->cmd->resp = skb;
2049
2050 sched_wq:
2051 queue_work(dev->wq, &dev->cmd_complete_work);
2052 }
2053 EXPORT_SYMBOL(pn533_recv_frame);
2054
2055 /* Split the Tx skb into small chunks */
pn533_fill_fragment_skbs(struct pn533 * dev,struct sk_buff * skb)2056 static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb)
2057 {
2058 struct sk_buff *frag;
2059 int frag_size;
2060
2061 do {
2062 /* Remaining size */
2063 if (skb->len > PN533_CMD_DATAFRAME_MAXLEN)
2064 frag_size = PN533_CMD_DATAFRAME_MAXLEN;
2065 else
2066 frag_size = skb->len;
2067
2068 /* Allocate and reserve */
2069 frag = pn533_alloc_skb(dev, frag_size);
2070 if (!frag) {
2071 skb_queue_purge(&dev->fragment_skb);
2072 break;
2073 }
2074
2075 if (!dev->tgt_mode) {
2076 /* Reserve the TG/MI byte */
2077 skb_reserve(frag, 1);
2078
2079 /* MI + TG */
2080 if (frag_size == PN533_CMD_DATAFRAME_MAXLEN)
2081 *(u8 *)skb_push(frag, sizeof(u8)) =
2082 (PN533_CMD_MI_MASK | 1);
2083 else
2084 *(u8 *)skb_push(frag, sizeof(u8)) = 1; /* TG */
2085 }
2086
2087 skb_put_data(frag, skb->data, frag_size);
2088
2089 /* Reduce the size of incoming buffer */
2090 skb_pull(skb, frag_size);
2091
2092 /* Add this to skb_queue */
2093 skb_queue_tail(&dev->fragment_skb, frag);
2094
2095 } while (skb->len > 0);
2096
2097 dev_kfree_skb(skb);
2098
2099 return skb_queue_len(&dev->fragment_skb);
2100 }
2101
pn533_transceive(struct nfc_dev * nfc_dev,struct nfc_target * target,struct sk_buff * skb,data_exchange_cb_t cb,void * cb_context)2102 static int pn533_transceive(struct nfc_dev *nfc_dev,
2103 struct nfc_target *target, struct sk_buff *skb,
2104 data_exchange_cb_t cb, void *cb_context)
2105 {
2106 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2107 struct pn533_data_exchange_arg *arg = NULL;
2108 int rc;
2109
2110 dev_dbg(dev->dev, "%s\n", __func__);
2111
2112 if (!dev->tgt_active_prot) {
2113 nfc_err(dev->dev,
2114 "Can't exchange data if there is no active target\n");
2115 rc = -EINVAL;
2116 goto error;
2117 }
2118
2119 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2120 if (!arg) {
2121 rc = -ENOMEM;
2122 goto error;
2123 }
2124
2125 arg->cb = cb;
2126 arg->cb_context = cb_context;
2127
2128 switch (dev->device_type) {
2129 case PN533_DEVICE_PASORI:
2130 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2131 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2132 skb,
2133 pn533_data_exchange_complete,
2134 arg);
2135
2136 break;
2137 }
2138 /* fall through */
2139 default:
2140 /* jumbo frame ? */
2141 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2142 rc = pn533_fill_fragment_skbs(dev, skb);
2143 if (rc <= 0)
2144 goto error;
2145
2146 skb = skb_dequeue(&dev->fragment_skb);
2147 if (!skb) {
2148 rc = -EIO;
2149 goto error;
2150 }
2151 } else {
2152 *(u8 *)skb_push(skb, sizeof(u8)) = 1; /* TG */
2153 }
2154
2155 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2156 skb, pn533_data_exchange_complete,
2157 arg);
2158
2159 break;
2160 }
2161
2162 if (rc < 0) /* rc from send_async */
2163 goto error;
2164
2165 return 0;
2166
2167 error:
2168 kfree(arg);
2169 dev_kfree_skb(skb);
2170 return rc;
2171 }
2172
pn533_tm_send_complete(struct pn533 * dev,void * arg,struct sk_buff * resp)2173 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
2174 struct sk_buff *resp)
2175 {
2176 u8 status;
2177
2178 dev_dbg(dev->dev, "%s\n", __func__);
2179
2180 if (IS_ERR(resp))
2181 return PTR_ERR(resp);
2182
2183 status = resp->data[0];
2184
2185 /* Prepare for the next round */
2186 if (skb_queue_len(&dev->fragment_skb) > 0) {
2187 queue_work(dev->wq, &dev->mi_tm_tx_work);
2188 return -EINPROGRESS;
2189 }
2190 dev_kfree_skb(resp);
2191
2192 if (status != 0) {
2193 nfc_tm_deactivated(dev->nfc_dev);
2194
2195 dev->tgt_mode = 0;
2196
2197 return 0;
2198 }
2199
2200 queue_work(dev->wq, &dev->tg_work);
2201
2202 return 0;
2203 }
2204
pn533_tm_send(struct nfc_dev * nfc_dev,struct sk_buff * skb)2205 static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2206 {
2207 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2208 int rc;
2209
2210 dev_dbg(dev->dev, "%s\n", __func__);
2211
2212 /* let's split in multiple chunks if size's too big */
2213 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2214 rc = pn533_fill_fragment_skbs(dev, skb);
2215 if (rc <= 0)
2216 goto error;
2217
2218 /* get the first skb */
2219 skb = skb_dequeue(&dev->fragment_skb);
2220 if (!skb) {
2221 rc = -EIO;
2222 goto error;
2223 }
2224
2225 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_META_DATA, skb,
2226 pn533_tm_send_complete, NULL);
2227 } else {
2228 /* Send th skb */
2229 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2230 pn533_tm_send_complete, NULL);
2231 }
2232
2233 error:
2234 if (rc < 0) {
2235 dev_kfree_skb(skb);
2236 skb_queue_purge(&dev->fragment_skb);
2237 }
2238
2239 return rc;
2240 }
2241
pn533_wq_mi_recv(struct work_struct * work)2242 static void pn533_wq_mi_recv(struct work_struct *work)
2243 {
2244 struct pn533 *dev = container_of(work, struct pn533, mi_rx_work);
2245 struct sk_buff *skb;
2246 int rc;
2247
2248 dev_dbg(dev->dev, "%s\n", __func__);
2249
2250 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
2251 if (!skb)
2252 goto error;
2253
2254 switch (dev->device_type) {
2255 case PN533_DEVICE_PASORI:
2256 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2257 rc = pn533_send_cmd_direct_async(dev,
2258 PN533_CMD_IN_COMM_THRU,
2259 skb,
2260 pn533_data_exchange_complete,
2261 dev->cmd_complete_mi_arg);
2262
2263 break;
2264 }
2265 /* fall through */
2266 default:
2267 skb_put_u8(skb, 1); /*TG*/
2268
2269 rc = pn533_send_cmd_direct_async(dev,
2270 PN533_CMD_IN_DATA_EXCHANGE,
2271 skb,
2272 pn533_data_exchange_complete,
2273 dev->cmd_complete_mi_arg);
2274
2275 break;
2276 }
2277
2278 if (rc == 0) /* success */
2279 return;
2280
2281 nfc_err(dev->dev,
2282 "Error %d when trying to perform data_exchange\n", rc);
2283
2284 dev_kfree_skb(skb);
2285 kfree(dev->cmd_complete_mi_arg);
2286
2287 error:
2288 dev->phy_ops->send_ack(dev, GFP_KERNEL);
2289 queue_work(dev->wq, &dev->cmd_work);
2290 }
2291
pn533_wq_mi_send(struct work_struct * work)2292 static void pn533_wq_mi_send(struct work_struct *work)
2293 {
2294 struct pn533 *dev = container_of(work, struct pn533, mi_tx_work);
2295 struct sk_buff *skb;
2296 int rc;
2297
2298 dev_dbg(dev->dev, "%s\n", __func__);
2299
2300 /* Grab the first skb in the queue */
2301 skb = skb_dequeue(&dev->fragment_skb);
2302
2303 if (skb == NULL) { /* No more data */
2304 /* Reset the queue for future use */
2305 skb_queue_head_init(&dev->fragment_skb);
2306 goto error;
2307 }
2308
2309 switch (dev->device_type) {
2310 case PN533_DEVICE_PASORI:
2311 if (dev->tgt_active_prot != NFC_PROTO_FELICA) {
2312 rc = -EIO;
2313 break;
2314 }
2315
2316 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU,
2317 skb,
2318 pn533_data_exchange_complete,
2319 dev->cmd_complete_dep_arg);
2320
2321 break;
2322
2323 default:
2324 /* Still some fragments? */
2325 rc = pn533_send_cmd_direct_async(dev,
2326 PN533_CMD_IN_DATA_EXCHANGE,
2327 skb,
2328 pn533_data_exchange_complete,
2329 dev->cmd_complete_dep_arg);
2330
2331 break;
2332 }
2333
2334 if (rc == 0) /* success */
2335 return;
2336
2337 nfc_err(dev->dev,
2338 "Error %d when trying to perform data_exchange\n", rc);
2339
2340 dev_kfree_skb(skb);
2341 kfree(dev->cmd_complete_dep_arg);
2342
2343 error:
2344 dev->phy_ops->send_ack(dev, GFP_KERNEL);
2345 queue_work(dev->wq, &dev->cmd_work);
2346 }
2347
pn533_set_configuration(struct pn533 * dev,u8 cfgitem,u8 * cfgdata,u8 cfgdata_len)2348 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2349 u8 cfgdata_len)
2350 {
2351 struct sk_buff *skb;
2352 struct sk_buff *resp;
2353 int skb_len;
2354
2355 dev_dbg(dev->dev, "%s\n", __func__);
2356
2357 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
2358
2359 skb = pn533_alloc_skb(dev, skb_len);
2360 if (!skb)
2361 return -ENOMEM;
2362
2363 skb_put_u8(skb, cfgitem);
2364 skb_put_data(skb, cfgdata, cfgdata_len);
2365
2366 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2367 if (IS_ERR(resp))
2368 return PTR_ERR(resp);
2369
2370 dev_kfree_skb(resp);
2371 return 0;
2372 }
2373
pn533_get_firmware_version(struct pn533 * dev,struct pn533_fw_version * fv)2374 static int pn533_get_firmware_version(struct pn533 *dev,
2375 struct pn533_fw_version *fv)
2376 {
2377 struct sk_buff *skb;
2378 struct sk_buff *resp;
2379
2380 skb = pn533_alloc_skb(dev, 0);
2381 if (!skb)
2382 return -ENOMEM;
2383
2384 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2385 if (IS_ERR(resp))
2386 return PTR_ERR(resp);
2387
2388 fv->ic = resp->data[0];
2389 fv->ver = resp->data[1];
2390 fv->rev = resp->data[2];
2391 fv->support = resp->data[3];
2392
2393 dev_kfree_skb(resp);
2394 return 0;
2395 }
2396
pn533_pasori_fw_reset(struct pn533 * dev)2397 static int pn533_pasori_fw_reset(struct pn533 *dev)
2398 {
2399 struct sk_buff *skb;
2400 struct sk_buff *resp;
2401
2402 dev_dbg(dev->dev, "%s\n", __func__);
2403
2404 skb = pn533_alloc_skb(dev, sizeof(u8));
2405 if (!skb)
2406 return -ENOMEM;
2407
2408 skb_put_u8(skb, 0x1);
2409
2410 resp = pn533_send_cmd_sync(dev, 0x18, skb);
2411 if (IS_ERR(resp))
2412 return PTR_ERR(resp);
2413
2414 dev_kfree_skb(resp);
2415
2416 return 0;
2417 }
2418
pn533_rf_field(struct nfc_dev * nfc_dev,u8 rf)2419 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
2420 {
2421 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2422 u8 rf_field = !!rf;
2423 int rc;
2424
2425 rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
2426
2427 rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
2428 (u8 *)&rf_field, 1);
2429 if (rc) {
2430 nfc_err(dev->dev, "Error on setting RF field\n");
2431 return rc;
2432 }
2433
2434 return rc;
2435 }
2436
pn532_sam_configuration(struct nfc_dev * nfc_dev)2437 static int pn532_sam_configuration(struct nfc_dev *nfc_dev)
2438 {
2439 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2440 struct sk_buff *skb;
2441 struct sk_buff *resp;
2442
2443 skb = pn533_alloc_skb(dev, 1);
2444 if (!skb)
2445 return -ENOMEM;
2446
2447 skb_put_u8(skb, 0x01);
2448
2449 resp = pn533_send_cmd_sync(dev, PN533_CMD_SAM_CONFIGURATION, skb);
2450 if (IS_ERR(resp))
2451 return PTR_ERR(resp);
2452
2453 dev_kfree_skb(resp);
2454 return 0;
2455 }
2456
pn533_dev_up(struct nfc_dev * nfc_dev)2457 static int pn533_dev_up(struct nfc_dev *nfc_dev)
2458 {
2459 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2460
2461 if (dev->device_type == PN533_DEVICE_PN532) {
2462 int rc = pn532_sam_configuration(nfc_dev);
2463
2464 if (rc)
2465 return rc;
2466 }
2467
2468 return pn533_rf_field(nfc_dev, 1);
2469 }
2470
pn533_dev_down(struct nfc_dev * nfc_dev)2471 static int pn533_dev_down(struct nfc_dev *nfc_dev)
2472 {
2473 return pn533_rf_field(nfc_dev, 0);
2474 }
2475
2476 static struct nfc_ops pn533_nfc_ops = {
2477 .dev_up = pn533_dev_up,
2478 .dev_down = pn533_dev_down,
2479 .dep_link_up = pn533_dep_link_up,
2480 .dep_link_down = pn533_dep_link_down,
2481 .start_poll = pn533_start_poll,
2482 .stop_poll = pn533_stop_poll,
2483 .activate_target = pn533_activate_target,
2484 .deactivate_target = pn533_deactivate_target,
2485 .im_transceive = pn533_transceive,
2486 .tm_send = pn533_tm_send,
2487 };
2488
pn533_setup(struct pn533 * dev)2489 static int pn533_setup(struct pn533 *dev)
2490 {
2491 struct pn533_config_max_retries max_retries;
2492 struct pn533_config_timing timing;
2493 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2494 int rc;
2495
2496 switch (dev->device_type) {
2497 case PN533_DEVICE_STD:
2498 case PN533_DEVICE_PASORI:
2499 case PN533_DEVICE_ACR122U:
2500 case PN533_DEVICE_PN532:
2501 max_retries.mx_rty_atr = 0x2;
2502 max_retries.mx_rty_psl = 0x1;
2503 max_retries.mx_rty_passive_act =
2504 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2505
2506 timing.rfu = PN533_CONFIG_TIMING_102;
2507 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2508 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2509
2510 break;
2511
2512 default:
2513 nfc_err(dev->dev, "Unknown device type %d\n",
2514 dev->device_type);
2515 return -EINVAL;
2516 }
2517
2518 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2519 (u8 *)&max_retries, sizeof(max_retries));
2520 if (rc) {
2521 nfc_err(dev->dev,
2522 "Error on setting MAX_RETRIES config\n");
2523 return rc;
2524 }
2525
2526
2527 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2528 (u8 *)&timing, sizeof(timing));
2529 if (rc) {
2530 nfc_err(dev->dev, "Error on setting RF timings\n");
2531 return rc;
2532 }
2533
2534 switch (dev->device_type) {
2535 case PN533_DEVICE_STD:
2536 case PN533_DEVICE_PN532:
2537 break;
2538
2539 case PN533_DEVICE_PASORI:
2540 pn533_pasori_fw_reset(dev);
2541
2542 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2543 pasori_cfg, 3);
2544 if (rc) {
2545 nfc_err(dev->dev,
2546 "Error while settings PASORI config\n");
2547 return rc;
2548 }
2549
2550 pn533_pasori_fw_reset(dev);
2551
2552 break;
2553 }
2554
2555 return 0;
2556 }
2557
pn533_finalize_setup(struct pn533 * dev)2558 int pn533_finalize_setup(struct pn533 *dev)
2559 {
2560
2561 struct pn533_fw_version fw_ver;
2562 int rc;
2563
2564 memset(&fw_ver, 0, sizeof(fw_ver));
2565
2566 rc = pn533_get_firmware_version(dev, &fw_ver);
2567 if (rc) {
2568 nfc_err(dev->dev, "Unable to get FW version\n");
2569 return rc;
2570 }
2571
2572 nfc_info(dev->dev, "NXP PN5%02X firmware ver %d.%d now attached\n",
2573 fw_ver.ic, fw_ver.ver, fw_ver.rev);
2574
2575 rc = pn533_setup(dev);
2576 if (rc)
2577 return rc;
2578
2579 return 0;
2580 }
2581 EXPORT_SYMBOL_GPL(pn533_finalize_setup);
2582
pn533_register_device(u32 device_type,u32 protocols,enum pn533_protocol_type protocol_type,void * phy,struct pn533_phy_ops * phy_ops,struct pn533_frame_ops * fops,struct device * dev,struct device * parent)2583 struct pn533 *pn533_register_device(u32 device_type,
2584 u32 protocols,
2585 enum pn533_protocol_type protocol_type,
2586 void *phy,
2587 struct pn533_phy_ops *phy_ops,
2588 struct pn533_frame_ops *fops,
2589 struct device *dev,
2590 struct device *parent)
2591 {
2592 struct pn533 *priv;
2593 int rc = -ENOMEM;
2594
2595 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
2596 if (!priv)
2597 return ERR_PTR(-ENOMEM);
2598
2599 priv->phy = phy;
2600 priv->phy_ops = phy_ops;
2601 priv->dev = dev;
2602 if (fops != NULL)
2603 priv->ops = fops;
2604 else
2605 priv->ops = &pn533_std_frame_ops;
2606
2607 priv->protocol_type = protocol_type;
2608 priv->device_type = device_type;
2609
2610 mutex_init(&priv->cmd_lock);
2611
2612 INIT_WORK(&priv->cmd_work, pn533_wq_cmd);
2613 INIT_WORK(&priv->cmd_complete_work, pn533_wq_cmd_complete);
2614 INIT_WORK(&priv->mi_rx_work, pn533_wq_mi_recv);
2615 INIT_WORK(&priv->mi_tx_work, pn533_wq_mi_send);
2616 INIT_WORK(&priv->tg_work, pn533_wq_tg_get_data);
2617 INIT_WORK(&priv->mi_tm_rx_work, pn533_wq_tm_mi_recv);
2618 INIT_WORK(&priv->mi_tm_tx_work, pn533_wq_tm_mi_send);
2619 INIT_DELAYED_WORK(&priv->poll_work, pn533_wq_poll);
2620 INIT_WORK(&priv->rf_work, pn533_wq_rf);
2621 priv->wq = alloc_ordered_workqueue("pn533", 0);
2622 if (priv->wq == NULL)
2623 goto error;
2624
2625 timer_setup(&priv->listen_timer, pn533_listen_mode_timer, 0);
2626
2627 skb_queue_head_init(&priv->resp_q);
2628 skb_queue_head_init(&priv->fragment_skb);
2629
2630 INIT_LIST_HEAD(&priv->cmd_queue);
2631
2632 priv->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
2633 priv->ops->tx_header_len +
2634 PN533_CMD_DATAEXCH_HEAD_LEN,
2635 priv->ops->tx_tail_len);
2636 if (!priv->nfc_dev) {
2637 rc = -ENOMEM;
2638 goto destroy_wq;
2639 }
2640
2641 nfc_set_parent_dev(priv->nfc_dev, parent);
2642 nfc_set_drvdata(priv->nfc_dev, priv);
2643
2644 rc = nfc_register_device(priv->nfc_dev);
2645 if (rc)
2646 goto free_nfc_dev;
2647
2648 return priv;
2649
2650 free_nfc_dev:
2651 nfc_free_device(priv->nfc_dev);
2652
2653 destroy_wq:
2654 destroy_workqueue(priv->wq);
2655 error:
2656 kfree(priv);
2657 return ERR_PTR(rc);
2658 }
2659 EXPORT_SYMBOL_GPL(pn533_register_device);
2660
pn533_unregister_device(struct pn533 * priv)2661 void pn533_unregister_device(struct pn533 *priv)
2662 {
2663 struct pn533_cmd *cmd, *n;
2664
2665 nfc_unregister_device(priv->nfc_dev);
2666 nfc_free_device(priv->nfc_dev);
2667
2668 flush_delayed_work(&priv->poll_work);
2669 destroy_workqueue(priv->wq);
2670
2671 skb_queue_purge(&priv->resp_q);
2672
2673 del_timer(&priv->listen_timer);
2674
2675 list_for_each_entry_safe(cmd, n, &priv->cmd_queue, queue) {
2676 list_del(&cmd->queue);
2677 kfree(cmd);
2678 }
2679
2680 kfree(priv);
2681 }
2682 EXPORT_SYMBOL_GPL(pn533_unregister_device);
2683
2684
2685 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
2686 MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2687 MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
2688 MODULE_DESCRIPTION("PN533 driver ver " VERSION);
2689 MODULE_VERSION(VERSION);
2690 MODULE_LICENSE("GPL");
2691
