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1 /*
2 * Copyright (C) 2011 Instituto Nokia de Tecnologia
3 * Copyright (C) 2012-2013 Tieto Poland
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the
17 * Free Software Foundation, Inc.,
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 */
20
21 #include <linux/device.h>
22 #include <linux/kernel.h>
23 #include <linux/module.h>
24 #include <linux/slab.h>
25 #include <linux/usb.h>
26 #include <linux/nfc.h>
27 #include <linux/netdevice.h>
28 #include <net/nfc/nfc.h>
29
30 #define VERSION "0.1"
31
32 #define PN533_VENDOR_ID 0x4CC
33 #define PN533_PRODUCT_ID 0x2533
34
35 #define SCM_VENDOR_ID 0x4E6
36 #define SCL3711_PRODUCT_ID 0x5591
37
38 #define SONY_VENDOR_ID 0x054c
39 #define PASORI_PRODUCT_ID 0x02e1
40
41 #define PN533_DEVICE_STD 0x1
42 #define PN533_DEVICE_PASORI 0x2
43
44 #define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\
45 NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\
46 NFC_PROTO_NFC_DEP_MASK |\
47 NFC_PROTO_ISO14443_B_MASK)
48
49 #define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
50 NFC_PROTO_MIFARE_MASK | \
51 NFC_PROTO_FELICA_MASK | \
52 NFC_PROTO_ISO14443_MASK | \
53 NFC_PROTO_NFC_DEP_MASK)
54
55 static const struct usb_device_id pn533_table[] = {
56 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
57 .idVendor = PN533_VENDOR_ID,
58 .idProduct = PN533_PRODUCT_ID,
59 .driver_info = PN533_DEVICE_STD,
60 },
61 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
62 .idVendor = SCM_VENDOR_ID,
63 .idProduct = SCL3711_PRODUCT_ID,
64 .driver_info = PN533_DEVICE_STD,
65 },
66 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
67 .idVendor = SONY_VENDOR_ID,
68 .idProduct = PASORI_PRODUCT_ID,
69 .driver_info = PN533_DEVICE_PASORI,
70 },
71 { }
72 };
73 MODULE_DEVICE_TABLE(usb, pn533_table);
74
75 /* How much time we spend listening for initiators */
76 #define PN533_LISTEN_TIME 2
77
78 /* Standard pn533 frame definitions */
79 #define PN533_STD_FRAME_HEADER_LEN (sizeof(struct pn533_std_frame) \
80 + 2) /* data[0] TFI, data[1] CC */
81 #define PN533_STD_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
82
83 /*
84 * Max extended frame payload len, excluding TFI and CC
85 * which are already in PN533_FRAME_HEADER_LEN.
86 */
87 #define PN533_STD_FRAME_MAX_PAYLOAD_LEN 263
88
89 #define PN533_STD_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
90 Postamble (1) */
91 #define PN533_STD_FRAME_CHECKSUM(f) (f->data[f->datalen])
92 #define PN533_STD_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
93
94 /* start of frame */
95 #define PN533_STD_FRAME_SOF 0x00FF
96
97 /* standard frame identifier: in/out/error */
98 #define PN533_STD_FRAME_IDENTIFIER(f) (f->data[0]) /* TFI */
99 #define PN533_STD_FRAME_DIR_OUT 0xD4
100 #define PN533_STD_FRAME_DIR_IN 0xD5
101
102 /* PN533 Commands */
103 #define PN533_STD_FRAME_CMD(f) (f->data[1])
104
105 #define PN533_CMD_GET_FIRMWARE_VERSION 0x02
106 #define PN533_CMD_RF_CONFIGURATION 0x32
107 #define PN533_CMD_IN_DATA_EXCHANGE 0x40
108 #define PN533_CMD_IN_COMM_THRU 0x42
109 #define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
110 #define PN533_CMD_IN_ATR 0x50
111 #define PN533_CMD_IN_RELEASE 0x52
112 #define PN533_CMD_IN_JUMP_FOR_DEP 0x56
113
114 #define PN533_CMD_TG_INIT_AS_TARGET 0x8c
115 #define PN533_CMD_TG_GET_DATA 0x86
116 #define PN533_CMD_TG_SET_DATA 0x8e
117 #define PN533_CMD_UNDEF 0xff
118
119 #define PN533_CMD_RESPONSE(cmd) (cmd + 1)
120
121 /* PN533 Return codes */
122 #define PN533_CMD_RET_MASK 0x3F
123 #define PN533_CMD_MI_MASK 0x40
124 #define PN533_CMD_RET_SUCCESS 0x00
125
126 struct pn533;
127
128 typedef int (*pn533_cmd_complete_t) (struct pn533 *dev, void *arg, int status);
129
130 typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg,
131 struct sk_buff *resp);
132
133 /* structs for pn533 commands */
134
135 /* PN533_CMD_GET_FIRMWARE_VERSION */
136 struct pn533_fw_version {
137 u8 ic;
138 u8 ver;
139 u8 rev;
140 u8 support;
141 };
142
143 /* PN533_CMD_RF_CONFIGURATION */
144 #define PN533_CFGITEM_TIMING 0x02
145 #define PN533_CFGITEM_MAX_RETRIES 0x05
146 #define PN533_CFGITEM_PASORI 0x82
147
148 #define PN533_CONFIG_TIMING_102 0xb
149 #define PN533_CONFIG_TIMING_204 0xc
150 #define PN533_CONFIG_TIMING_409 0xd
151 #define PN533_CONFIG_TIMING_819 0xe
152
153 #define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
154 #define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
155
156 struct pn533_config_max_retries {
157 u8 mx_rty_atr;
158 u8 mx_rty_psl;
159 u8 mx_rty_passive_act;
160 } __packed;
161
162 struct pn533_config_timing {
163 u8 rfu;
164 u8 atr_res_timeout;
165 u8 dep_timeout;
166 } __packed;
167
168 /* PN533_CMD_IN_LIST_PASSIVE_TARGET */
169
170 /* felica commands opcode */
171 #define PN533_FELICA_OPC_SENSF_REQ 0
172 #define PN533_FELICA_OPC_SENSF_RES 1
173 /* felica SENSF_REQ parameters */
174 #define PN533_FELICA_SENSF_SC_ALL 0xFFFF
175 #define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
176 #define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
177 #define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
178
179 /* type B initiator_data values */
180 #define PN533_TYPE_B_AFI_ALL_FAMILIES 0
181 #define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
182 #define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
183
184 union pn533_cmd_poll_initdata {
185 struct {
186 u8 afi;
187 u8 polling_method;
188 } __packed type_b;
189 struct {
190 u8 opcode;
191 __be16 sc;
192 u8 rc;
193 u8 tsn;
194 } __packed felica;
195 };
196
197 /* Poll modulations */
198 enum {
199 PN533_POLL_MOD_106KBPS_A,
200 PN533_POLL_MOD_212KBPS_FELICA,
201 PN533_POLL_MOD_424KBPS_FELICA,
202 PN533_POLL_MOD_106KBPS_JEWEL,
203 PN533_POLL_MOD_847KBPS_B,
204 PN533_LISTEN_MOD,
205
206 __PN533_POLL_MOD_AFTER_LAST,
207 };
208 #define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
209
210 struct pn533_poll_modulations {
211 struct {
212 u8 maxtg;
213 u8 brty;
214 union pn533_cmd_poll_initdata initiator_data;
215 } __packed data;
216 u8 len;
217 };
218
219 static const struct pn533_poll_modulations poll_mod[] = {
220 [PN533_POLL_MOD_106KBPS_A] = {
221 .data = {
222 .maxtg = 1,
223 .brty = 0,
224 },
225 .len = 2,
226 },
227 [PN533_POLL_MOD_212KBPS_FELICA] = {
228 .data = {
229 .maxtg = 1,
230 .brty = 1,
231 .initiator_data.felica = {
232 .opcode = PN533_FELICA_OPC_SENSF_REQ,
233 .sc = PN533_FELICA_SENSF_SC_ALL,
234 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
235 .tsn = 0,
236 },
237 },
238 .len = 7,
239 },
240 [PN533_POLL_MOD_424KBPS_FELICA] = {
241 .data = {
242 .maxtg = 1,
243 .brty = 2,
244 .initiator_data.felica = {
245 .opcode = PN533_FELICA_OPC_SENSF_REQ,
246 .sc = PN533_FELICA_SENSF_SC_ALL,
247 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
248 .tsn = 0,
249 },
250 },
251 .len = 7,
252 },
253 [PN533_POLL_MOD_106KBPS_JEWEL] = {
254 .data = {
255 .maxtg = 1,
256 .brty = 4,
257 },
258 .len = 2,
259 },
260 [PN533_POLL_MOD_847KBPS_B] = {
261 .data = {
262 .maxtg = 1,
263 .brty = 8,
264 .initiator_data.type_b = {
265 .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
266 .polling_method =
267 PN533_TYPE_B_POLL_METHOD_TIMESLOT,
268 },
269 },
270 .len = 3,
271 },
272 [PN533_LISTEN_MOD] = {
273 .len = 0,
274 },
275 };
276
277 /* PN533_CMD_IN_ATR */
278
279 struct pn533_cmd_activate_response {
280 u8 status;
281 u8 nfcid3t[10];
282 u8 didt;
283 u8 bst;
284 u8 brt;
285 u8 to;
286 u8 ppt;
287 /* optional */
288 u8 gt[];
289 } __packed;
290
291 struct pn533_cmd_jump_dep_response {
292 u8 status;
293 u8 tg;
294 u8 nfcid3t[10];
295 u8 didt;
296 u8 bst;
297 u8 brt;
298 u8 to;
299 u8 ppt;
300 /* optional */
301 u8 gt[];
302 } __packed;
303
304
305 /* PN533_TG_INIT_AS_TARGET */
306 #define PN533_INIT_TARGET_PASSIVE 0x1
307 #define PN533_INIT_TARGET_DEP 0x2
308
309 #define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
310 #define PN533_INIT_TARGET_RESP_ACTIVE 0x1
311 #define PN533_INIT_TARGET_RESP_DEP 0x4
312
313 struct pn533 {
314 struct usb_device *udev;
315 struct usb_interface *interface;
316 struct nfc_dev *nfc_dev;
317 u32 device_type;
318
319 struct urb *out_urb;
320 struct urb *in_urb;
321
322 struct sk_buff_head resp_q;
323
324 struct workqueue_struct *wq;
325 struct work_struct cmd_work;
326 struct work_struct cmd_complete_work;
327 struct work_struct poll_work;
328 struct work_struct mi_work;
329 struct work_struct tg_work;
330
331 struct list_head cmd_queue;
332 struct pn533_cmd *cmd;
333 u8 cmd_pending;
334 struct mutex cmd_lock; /* protects cmd queue */
335
336 void *cmd_complete_mi_arg;
337
338 struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
339 u8 poll_mod_count;
340 u8 poll_mod_curr;
341 u32 poll_protocols;
342 u32 listen_protocols;
343 struct timer_list listen_timer;
344 int cancel_listen;
345
346 u8 *gb;
347 size_t gb_len;
348
349 u8 tgt_available_prots;
350 u8 tgt_active_prot;
351 u8 tgt_mode;
352
353 struct pn533_frame_ops *ops;
354 };
355
356 struct pn533_cmd {
357 struct list_head queue;
358 u8 code;
359 int status;
360 struct sk_buff *req;
361 struct sk_buff *resp;
362 int resp_len;
363 pn533_send_async_complete_t complete_cb;
364 void *complete_cb_context;
365 };
366
367 struct pn533_std_frame {
368 u8 preamble;
369 __be16 start_frame;
370 u8 datalen;
371 u8 datalen_checksum;
372 u8 data[];
373 } __packed;
374
375 struct pn533_frame_ops {
376 void (*tx_frame_init)(void *frame, u8 cmd_code);
377 void (*tx_frame_finish)(void *frame);
378 void (*tx_update_payload_len)(void *frame, int len);
379 int tx_header_len;
380 int tx_tail_len;
381
382 bool (*rx_is_frame_valid)(void *frame);
383 int (*rx_frame_size)(void *frame);
384 int rx_header_len;
385 int rx_tail_len;
386
387 int max_payload_len;
388 u8 (*get_cmd_code)(void *frame);
389 };
390
391 /* The rule: value + checksum = 0 */
392 static inline u8 pn533_std_checksum(u8 value)
393 {
394 return ~value + 1;
395 }
396
397 /* The rule: sum(data elements) + checksum = 0 */
398 static u8 pn533_std_data_checksum(u8 *data, int datalen)
399 {
400 u8 sum = 0;
401 int i;
402
403 for (i = 0; i < datalen; i++)
404 sum += data[i];
405
406 return pn533_std_checksum(sum);
407 }
408
409 static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
410 {
411 struct pn533_std_frame *frame = _frame;
412
413 frame->preamble = 0;
414 frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
415 PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
416 PN533_STD_FRAME_CMD(frame) = cmd_code;
417 frame->datalen = 2;
418 }
419
420 static void pn533_std_tx_frame_finish(void *_frame)
421 {
422 struct pn533_std_frame *frame = _frame;
423
424 frame->datalen_checksum = pn533_std_checksum(frame->datalen);
425
426 PN533_STD_FRAME_CHECKSUM(frame) =
427 pn533_std_data_checksum(frame->data, frame->datalen);
428
429 PN533_STD_FRAME_POSTAMBLE(frame) = 0;
430 }
431
432 static void pn533_std_tx_update_payload_len(void *_frame, int len)
433 {
434 struct pn533_std_frame *frame = _frame;
435
436 frame->datalen += len;
437 }
438
439 static bool pn533_std_rx_frame_is_valid(void *_frame)
440 {
441 u8 checksum;
442 struct pn533_std_frame *frame = _frame;
443
444 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
445 return false;
446
447 checksum = pn533_std_checksum(frame->datalen);
448 if (checksum != frame->datalen_checksum)
449 return false;
450
451 checksum = pn533_std_data_checksum(frame->data, frame->datalen);
452 if (checksum != PN533_STD_FRAME_CHECKSUM(frame))
453 return false;
454
455 return true;
456 }
457
458 static bool pn533_std_rx_frame_is_ack(struct pn533_std_frame *frame)
459 {
460 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
461 return false;
462
463 if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
464 return false;
465
466 return true;
467 }
468
469 static inline int pn533_std_rx_frame_size(void *frame)
470 {
471 struct pn533_std_frame *f = frame;
472
473 return sizeof(struct pn533_std_frame) + f->datalen +
474 PN533_STD_FRAME_TAIL_LEN;
475 }
476
477 static u8 pn533_std_get_cmd_code(void *frame)
478 {
479 struct pn533_std_frame *f = frame;
480
481 return PN533_STD_FRAME_CMD(f);
482 }
483
484 static struct pn533_frame_ops pn533_std_frame_ops = {
485 .tx_frame_init = pn533_std_tx_frame_init,
486 .tx_frame_finish = pn533_std_tx_frame_finish,
487 .tx_update_payload_len = pn533_std_tx_update_payload_len,
488 .tx_header_len = PN533_STD_FRAME_HEADER_LEN,
489 .tx_tail_len = PN533_STD_FRAME_TAIL_LEN,
490
491 .rx_is_frame_valid = pn533_std_rx_frame_is_valid,
492 .rx_frame_size = pn533_std_rx_frame_size,
493 .rx_header_len = PN533_STD_FRAME_HEADER_LEN,
494 .rx_tail_len = PN533_STD_FRAME_TAIL_LEN,
495
496 .max_payload_len = PN533_STD_FRAME_MAX_PAYLOAD_LEN,
497 .get_cmd_code = pn533_std_get_cmd_code,
498 };
499
500 static bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
501 {
502 return (dev->ops->get_cmd_code(frame) ==
503 PN533_CMD_RESPONSE(dev->cmd->code));
504 }
505
506 static void pn533_recv_response(struct urb *urb)
507 {
508 struct pn533 *dev = urb->context;
509 struct pn533_cmd *cmd = dev->cmd;
510 u8 *in_frame;
511
512 cmd->status = urb->status;
513
514 switch (urb->status) {
515 case 0:
516 break; /* success */
517 case -ECONNRESET:
518 case -ENOENT:
519 nfc_dev_dbg(&dev->interface->dev,
520 "The urb has been canceled (status %d)",
521 urb->status);
522 goto sched_wq;
523 case -ESHUTDOWN:
524 default:
525 nfc_dev_err(&dev->interface->dev,
526 "Urb failure (status %d)", urb->status);
527 goto sched_wq;
528 }
529
530 in_frame = dev->in_urb->transfer_buffer;
531
532 nfc_dev_dbg(&dev->interface->dev, "Received a frame.");
533 print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
534 dev->ops->rx_frame_size(in_frame), false);
535
536 if (!dev->ops->rx_is_frame_valid(in_frame)) {
537 nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
538 cmd->status = -EIO;
539 goto sched_wq;
540 }
541
542 if (!pn533_rx_frame_is_cmd_response(dev, in_frame)) {
543 nfc_dev_err(&dev->interface->dev,
544 "It it not the response to the last command");
545 cmd->status = -EIO;
546 goto sched_wq;
547 }
548
549 sched_wq:
550 queue_work(dev->wq, &dev->cmd_complete_work);
551 }
552
553 static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
554 {
555 dev->in_urb->complete = pn533_recv_response;
556
557 return usb_submit_urb(dev->in_urb, flags);
558 }
559
560 static void pn533_recv_ack(struct urb *urb)
561 {
562 struct pn533 *dev = urb->context;
563 struct pn533_cmd *cmd = dev->cmd;
564 struct pn533_std_frame *in_frame;
565 int rc;
566
567 cmd->status = urb->status;
568
569 switch (urb->status) {
570 case 0:
571 break; /* success */
572 case -ECONNRESET:
573 case -ENOENT:
574 nfc_dev_dbg(&dev->interface->dev,
575 "The urb has been stopped (status %d)",
576 urb->status);
577 goto sched_wq;
578 case -ESHUTDOWN:
579 default:
580 nfc_dev_err(&dev->interface->dev,
581 "Urb failure (status %d)", urb->status);
582 goto sched_wq;
583 }
584
585 in_frame = dev->in_urb->transfer_buffer;
586
587 if (!pn533_std_rx_frame_is_ack(in_frame)) {
588 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
589 cmd->status = -EIO;
590 goto sched_wq;
591 }
592
593 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
594 if (rc) {
595 nfc_dev_err(&dev->interface->dev,
596 "usb_submit_urb failed with result %d", rc);
597 cmd->status = rc;
598 goto sched_wq;
599 }
600
601 return;
602
603 sched_wq:
604 queue_work(dev->wq, &dev->cmd_complete_work);
605 }
606
607 static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
608 {
609 dev->in_urb->complete = pn533_recv_ack;
610
611 return usb_submit_urb(dev->in_urb, flags);
612 }
613
614 static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
615 {
616 u8 ack[PN533_STD_FRAME_ACK_SIZE] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
617 /* spec 7.1.1.3: Preamble, SoPC (2), ACK Code (2), Postamble */
618 int rc;
619
620 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
621
622 dev->out_urb->transfer_buffer = ack;
623 dev->out_urb->transfer_buffer_length = sizeof(ack);
624 rc = usb_submit_urb(dev->out_urb, flags);
625
626 return rc;
627 }
628
629 static int __pn533_send_frame_async(struct pn533 *dev,
630 struct sk_buff *out,
631 struct sk_buff *in,
632 int in_len)
633 {
634 int rc;
635
636 dev->out_urb->transfer_buffer = out->data;
637 dev->out_urb->transfer_buffer_length = out->len;
638
639 dev->in_urb->transfer_buffer = in->data;
640 dev->in_urb->transfer_buffer_length = in_len;
641
642 print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
643 out->data, out->len, false);
644
645 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
646 if (rc)
647 return rc;
648
649 rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
650 if (rc)
651 goto error;
652
653 return 0;
654
655 error:
656 usb_unlink_urb(dev->out_urb);
657 return rc;
658 }
659
660 static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
661 struct sk_buff *skb)
662 {
663 /* payload is already there, just update datalen */
664 int payload_len = skb->len;
665 struct pn533_frame_ops *ops = dev->ops;
666
667
668 skb_push(skb, ops->tx_header_len);
669 skb_put(skb, ops->tx_tail_len);
670
671 ops->tx_frame_init(skb->data, cmd_code);
672 ops->tx_update_payload_len(skb->data, payload_len);
673 ops->tx_frame_finish(skb->data);
674 }
675
676 static int pn533_send_async_complete(struct pn533 *dev)
677 {
678 struct pn533_cmd *cmd = dev->cmd;
679 int status = cmd->status;
680
681 struct sk_buff *req = cmd->req;
682 struct sk_buff *resp = cmd->resp;
683
684 int rc;
685
686 dev_kfree_skb(req);
687
688 if (status < 0) {
689 rc = cmd->complete_cb(dev, cmd->complete_cb_context,
690 ERR_PTR(status));
691 dev_kfree_skb(resp);
692 goto done;
693 }
694
695 skb_put(resp, dev->ops->rx_frame_size(resp->data));
696 skb_pull(resp, dev->ops->rx_header_len);
697 skb_trim(resp, resp->len - dev->ops->rx_tail_len);
698
699 rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
700
701 done:
702 kfree(cmd);
703 dev->cmd = NULL;
704 return rc;
705 }
706
707 static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
708 struct sk_buff *req, struct sk_buff *resp,
709 int resp_len,
710 pn533_send_async_complete_t complete_cb,
711 void *complete_cb_context)
712 {
713 struct pn533_cmd *cmd;
714 int rc = 0;
715
716 nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x", cmd_code);
717
718 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
719 if (!cmd)
720 return -ENOMEM;
721
722 cmd->code = cmd_code;
723 cmd->req = req;
724 cmd->resp = resp;
725 cmd->resp_len = resp_len;
726 cmd->complete_cb = complete_cb;
727 cmd->complete_cb_context = complete_cb_context;
728
729 pn533_build_cmd_frame(dev, cmd_code, req);
730
731 mutex_lock(&dev->cmd_lock);
732
733 if (!dev->cmd_pending) {
734 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
735 if (rc)
736 goto error;
737
738 dev->cmd_pending = 1;
739 dev->cmd = cmd;
740 goto unlock;
741 }
742
743 nfc_dev_dbg(&dev->interface->dev, "%s Queueing command 0x%x", __func__,
744 cmd_code);
745
746 INIT_LIST_HEAD(&cmd->queue);
747 list_add_tail(&cmd->queue, &dev->cmd_queue);
748
749 goto unlock;
750
751 error:
752 kfree(cmd);
753 unlock:
754 mutex_unlock(&dev->cmd_lock);
755 return rc;
756 }
757
758 static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
759 struct sk_buff *req,
760 pn533_send_async_complete_t complete_cb,
761 void *complete_cb_context)
762 {
763 struct sk_buff *resp;
764 int rc;
765 int resp_len = dev->ops->rx_header_len +
766 dev->ops->max_payload_len +
767 dev->ops->rx_tail_len;
768
769 resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);
770 if (!resp)
771 return -ENOMEM;
772
773 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
774 complete_cb_context);
775 if (rc)
776 dev_kfree_skb(resp);
777
778 return rc;
779 }
780
781 static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
782 struct sk_buff *req,
783 pn533_send_async_complete_t complete_cb,
784 void *complete_cb_context)
785 {
786 struct sk_buff *resp;
787 int rc;
788 int resp_len = dev->ops->rx_header_len +
789 dev->ops->max_payload_len +
790 dev->ops->rx_tail_len;
791
792 resp = alloc_skb(resp_len, GFP_KERNEL);
793 if (!resp)
794 return -ENOMEM;
795
796 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
797 complete_cb_context);
798 if (rc)
799 dev_kfree_skb(resp);
800
801 return rc;
802 }
803
804 /*
805 * pn533_send_cmd_direct_async
806 *
807 * The function sends a piority cmd directly to the chip omiting the cmd
808 * queue. It's intended to be used by chaining mechanism of received responses
809 * where the host has to request every single chunk of data before scheduling
810 * next cmd from the queue.
811 */
812 static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
813 struct sk_buff *req,
814 pn533_send_async_complete_t complete_cb,
815 void *complete_cb_context)
816 {
817 struct sk_buff *resp;
818 struct pn533_cmd *cmd;
819 int rc;
820 int resp_len = dev->ops->rx_header_len +
821 dev->ops->max_payload_len +
822 dev->ops->rx_tail_len;
823
824 resp = alloc_skb(resp_len, GFP_KERNEL);
825 if (!resp)
826 return -ENOMEM;
827
828 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
829 if (!cmd) {
830 dev_kfree_skb(resp);
831 return -ENOMEM;
832 }
833
834 cmd->code = cmd_code;
835 cmd->req = req;
836 cmd->resp = resp;
837 cmd->resp_len = resp_len;
838 cmd->complete_cb = complete_cb;
839 cmd->complete_cb_context = complete_cb_context;
840
841 pn533_build_cmd_frame(dev, cmd_code, req);
842
843 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
844 if (rc < 0) {
845 dev_kfree_skb(resp);
846 kfree(cmd);
847 } else {
848 dev->cmd = cmd;
849 }
850
851 return rc;
852 }
853
854 static void pn533_wq_cmd_complete(struct work_struct *work)
855 {
856 struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
857 int rc;
858
859 rc = pn533_send_async_complete(dev);
860 if (rc != -EINPROGRESS)
861 queue_work(dev->wq, &dev->cmd_work);
862 }
863
864 static void pn533_wq_cmd(struct work_struct *work)
865 {
866 struct pn533 *dev = container_of(work, struct pn533, cmd_work);
867 struct pn533_cmd *cmd;
868 int rc;
869
870 mutex_lock(&dev->cmd_lock);
871
872 if (list_empty(&dev->cmd_queue)) {
873 dev->cmd_pending = 0;
874 mutex_unlock(&dev->cmd_lock);
875 return;
876 }
877
878 cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
879
880 list_del(&cmd->queue);
881
882 mutex_unlock(&dev->cmd_lock);
883
884 rc = __pn533_send_frame_async(dev, cmd->req, cmd->resp, cmd->resp_len);
885 if (rc < 0) {
886 dev_kfree_skb(cmd->req);
887 dev_kfree_skb(cmd->resp);
888 kfree(cmd);
889 return;
890 }
891
892 dev->cmd = cmd;
893 }
894
895 struct pn533_sync_cmd_response {
896 struct sk_buff *resp;
897 struct completion done;
898 };
899
900 static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
901 struct sk_buff *resp)
902 {
903 struct pn533_sync_cmd_response *arg = _arg;
904
905 arg->resp = resp;
906 complete(&arg->done);
907
908 return 0;
909 }
910
911 /* pn533_send_cmd_sync
912 *
913 * Please note the req parameter is freed inside the function to
914 * limit a number of return value interpretations by the caller.
915 *
916 * 1. negative in case of error during TX path -> req should be freed
917 *
918 * 2. negative in case of error during RX path -> req should not be freed
919 * as it's been already freed at the begining of RX path by
920 * async_complete_cb.
921 *
922 * 3. valid pointer in case of succesfult RX path
923 *
924 * A caller has to check a return value with IS_ERR macro. If the test pass,
925 * the returned pointer is valid.
926 *
927 * */
928 static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
929 struct sk_buff *req)
930 {
931 int rc;
932 struct pn533_sync_cmd_response arg;
933
934 init_completion(&arg.done);
935
936 rc = pn533_send_cmd_async(dev, cmd_code, req,
937 pn533_send_sync_complete, &arg);
938 if (rc) {
939 dev_kfree_skb(req);
940 return ERR_PTR(rc);
941 }
942
943 wait_for_completion(&arg.done);
944
945 return arg.resp;
946 }
947
948 static void pn533_send_complete(struct urb *urb)
949 {
950 struct pn533 *dev = urb->context;
951
952 switch (urb->status) {
953 case 0:
954 break; /* success */
955 case -ECONNRESET:
956 case -ENOENT:
957 nfc_dev_dbg(&dev->interface->dev,
958 "The urb has been stopped (status %d)",
959 urb->status);
960 break;
961 case -ESHUTDOWN:
962 default:
963 nfc_dev_err(&dev->interface->dev,
964 "Urb failure (status %d)", urb->status);
965 }
966 }
967
968 static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
969 {
970 struct sk_buff *skb;
971
972 skb = alloc_skb(dev->ops->tx_header_len +
973 size +
974 dev->ops->tx_tail_len, GFP_KERNEL);
975
976 if (skb)
977 skb_reserve(skb, dev->ops->tx_header_len);
978
979 return skb;
980 }
981
982 struct pn533_target_type_a {
983 __be16 sens_res;
984 u8 sel_res;
985 u8 nfcid_len;
986 u8 nfcid_data[];
987 } __packed;
988
989
990 #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
991 #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
992 #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
993
994 #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
995 #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
996
997 #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
998 #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
999
1000 #define PN533_TYPE_A_SEL_PROT_MIFARE 0
1001 #define PN533_TYPE_A_SEL_PROT_ISO14443 1
1002 #define PN533_TYPE_A_SEL_PROT_DEP 2
1003 #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
1004
1005 static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
1006 int target_data_len)
1007 {
1008 u8 ssd;
1009 u8 platconf;
1010
1011 if (target_data_len < sizeof(struct pn533_target_type_a))
1012 return false;
1013
1014 /* The lenght check of nfcid[] and ats[] are not being performed because
1015 the values are not being used */
1016
1017 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1018 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
1019 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
1020
1021 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1022 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1023 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1024 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1025 return false;
1026
1027 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
1028 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
1029 return false;
1030
1031 return true;
1032 }
1033
1034 static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
1035 int tgt_data_len)
1036 {
1037 struct pn533_target_type_a *tgt_type_a;
1038
1039 tgt_type_a = (struct pn533_target_type_a *)tgt_data;
1040
1041 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
1042 return -EPROTO;
1043
1044 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
1045 case PN533_TYPE_A_SEL_PROT_MIFARE:
1046 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
1047 break;
1048 case PN533_TYPE_A_SEL_PROT_ISO14443:
1049 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
1050 break;
1051 case PN533_TYPE_A_SEL_PROT_DEP:
1052 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1053 break;
1054 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
1055 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
1056 NFC_PROTO_NFC_DEP_MASK;
1057 break;
1058 }
1059
1060 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
1061 nfc_tgt->sel_res = tgt_type_a->sel_res;
1062 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
1063 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
1064
1065 return 0;
1066 }
1067
1068 struct pn533_target_felica {
1069 u8 pol_res;
1070 u8 opcode;
1071 u8 nfcid2[8];
1072 u8 pad[8];
1073 /* optional */
1074 u8 syst_code[];
1075 } __packed;
1076
1077 #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
1078 #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
1079
1080 static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
1081 int target_data_len)
1082 {
1083 if (target_data_len < sizeof(struct pn533_target_felica))
1084 return false;
1085
1086 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
1087 return false;
1088
1089 return true;
1090 }
1091
1092 static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
1093 int tgt_data_len)
1094 {
1095 struct pn533_target_felica *tgt_felica;
1096
1097 tgt_felica = (struct pn533_target_felica *)tgt_data;
1098
1099 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
1100 return -EPROTO;
1101
1102 if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
1103 (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
1104 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1105 else
1106 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
1107
1108 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
1109 nfc_tgt->sensf_res_len = 9;
1110
1111 return 0;
1112 }
1113
1114 struct pn533_target_jewel {
1115 __be16 sens_res;
1116 u8 jewelid[4];
1117 } __packed;
1118
1119 static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
1120 int target_data_len)
1121 {
1122 u8 ssd;
1123 u8 platconf;
1124
1125 if (target_data_len < sizeof(struct pn533_target_jewel))
1126 return false;
1127
1128 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1129 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
1130 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
1131
1132 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1133 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1134 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1135 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1136 return false;
1137
1138 return true;
1139 }
1140
1141 static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
1142 int tgt_data_len)
1143 {
1144 struct pn533_target_jewel *tgt_jewel;
1145
1146 tgt_jewel = (struct pn533_target_jewel *)tgt_data;
1147
1148 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
1149 return -EPROTO;
1150
1151 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
1152 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
1153 nfc_tgt->nfcid1_len = 4;
1154 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
1155
1156 return 0;
1157 }
1158
1159 struct pn533_type_b_prot_info {
1160 u8 bitrate;
1161 u8 fsci_type;
1162 u8 fwi_adc_fo;
1163 } __packed;
1164
1165 #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1166 #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1167 #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1168
1169 struct pn533_type_b_sens_res {
1170 u8 opcode;
1171 u8 nfcid[4];
1172 u8 appdata[4];
1173 struct pn533_type_b_prot_info prot_info;
1174 } __packed;
1175
1176 #define PN533_TYPE_B_OPC_SENSB_RES 0x50
1177
1178 struct pn533_target_type_b {
1179 struct pn533_type_b_sens_res sensb_res;
1180 u8 attrib_res_len;
1181 u8 attrib_res[];
1182 } __packed;
1183
1184 static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1185 int target_data_len)
1186 {
1187 if (target_data_len < sizeof(struct pn533_target_type_b))
1188 return false;
1189
1190 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1191 return false;
1192
1193 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1194 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1195 return false;
1196
1197 return true;
1198 }
1199
1200 static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1201 int tgt_data_len)
1202 {
1203 struct pn533_target_type_b *tgt_type_b;
1204
1205 tgt_type_b = (struct pn533_target_type_b *)tgt_data;
1206
1207 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1208 return -EPROTO;
1209
1210 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
1211
1212 return 0;
1213 }
1214
1215 static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
1216 int tgdata_len)
1217 {
1218 struct nfc_target nfc_tgt;
1219 int rc;
1220
1221 nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
1222 dev->poll_mod_curr);
1223
1224 if (tg != 1)
1225 return -EPROTO;
1226
1227 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1228
1229 switch (dev->poll_mod_curr) {
1230 case PN533_POLL_MOD_106KBPS_A:
1231 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
1232 break;
1233 case PN533_POLL_MOD_212KBPS_FELICA:
1234 case PN533_POLL_MOD_424KBPS_FELICA:
1235 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
1236 break;
1237 case PN533_POLL_MOD_106KBPS_JEWEL:
1238 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
1239 break;
1240 case PN533_POLL_MOD_847KBPS_B:
1241 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
1242 break;
1243 default:
1244 nfc_dev_err(&dev->interface->dev,
1245 "Unknown current poll modulation");
1246 return -EPROTO;
1247 }
1248
1249 if (rc)
1250 return rc;
1251
1252 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
1253 nfc_dev_dbg(&dev->interface->dev,
1254 "The Tg found doesn't have the desired protocol");
1255 return -EAGAIN;
1256 }
1257
1258 nfc_dev_dbg(&dev->interface->dev,
1259 "Target found - supported protocols: 0x%x",
1260 nfc_tgt.supported_protocols);
1261
1262 dev->tgt_available_prots = nfc_tgt.supported_protocols;
1263
1264 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1265
1266 return 0;
1267 }
1268
1269 static inline void pn533_poll_next_mod(struct pn533 *dev)
1270 {
1271 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1272 }
1273
1274 static void pn533_poll_reset_mod_list(struct pn533 *dev)
1275 {
1276 dev->poll_mod_count = 0;
1277 }
1278
1279 static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1280 {
1281 dev->poll_mod_active[dev->poll_mod_count] =
1282 (struct pn533_poll_modulations *)&poll_mod[mod_index];
1283 dev->poll_mod_count++;
1284 }
1285
1286 static void pn533_poll_create_mod_list(struct pn533 *dev,
1287 u32 im_protocols, u32 tm_protocols)
1288 {
1289 pn533_poll_reset_mod_list(dev);
1290
1291 if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
1292 (im_protocols & NFC_PROTO_ISO14443_MASK) ||
1293 (im_protocols & NFC_PROTO_NFC_DEP_MASK))
1294 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1295
1296 if (im_protocols & NFC_PROTO_FELICA_MASK ||
1297 im_protocols & NFC_PROTO_NFC_DEP_MASK) {
1298 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1299 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1300 }
1301
1302 if (im_protocols & NFC_PROTO_JEWEL_MASK)
1303 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1304
1305 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
1306 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
1307
1308 if (tm_protocols)
1309 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
1310 }
1311
1312 static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
1313 {
1314 u8 nbtg, tg, *tgdata;
1315 int rc, tgdata_len;
1316
1317 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1318
1319 nbtg = resp->data[0];
1320 tg = resp->data[1];
1321 tgdata = &resp->data[2];
1322 tgdata_len = resp->len - 2; /* nbtg + tg */
1323
1324 if (nbtg) {
1325 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
1326
1327 /* We must stop the poll after a valid target found */
1328 if (rc == 0) {
1329 pn533_poll_reset_mod_list(dev);
1330 return 0;
1331 }
1332 }
1333
1334 return -EAGAIN;
1335 }
1336
1337 static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
1338 {
1339 struct sk_buff *skb;
1340 u8 *felica, *nfcid3, *gb;
1341
1342 u8 *gbytes = dev->gb;
1343 size_t gbytes_len = dev->gb_len;
1344
1345 u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1346 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1347 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1348 0xff, 0xff}; /* System code */
1349
1350 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1351 0x0, 0x0, 0x0,
1352 0x40}; /* SEL_RES for DEP */
1353
1354 unsigned int skb_len = 36 + /* mode (1), mifare (6),
1355 felica (18), nfcid3 (10), gb_len (1) */
1356 gbytes_len +
1357 1; /* len Tk*/
1358
1359 skb = pn533_alloc_skb(dev, skb_len);
1360 if (!skb)
1361 return NULL;
1362
1363 /* DEP support only */
1364 *skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
1365
1366 /* MIFARE params */
1367 memcpy(skb_put(skb, 6), mifare_params, 6);
1368
1369 /* Felica params */
1370 felica = skb_put(skb, 18);
1371 memcpy(felica, felica_params, 18);
1372 get_random_bytes(felica + 2, 6);
1373
1374 /* NFCID3 */
1375 nfcid3 = skb_put(skb, 10);
1376 memset(nfcid3, 0, 10);
1377 memcpy(nfcid3, felica, 8);
1378
1379 /* General bytes */
1380 *skb_put(skb, 1) = gbytes_len;
1381
1382 gb = skb_put(skb, gbytes_len);
1383 memcpy(gb, gbytes, gbytes_len);
1384
1385 /* Len Tk */
1386 *skb_put(skb, 1) = 0;
1387
1388 return skb;
1389 }
1390
1391 #define PN533_CMD_DATAEXCH_HEAD_LEN 1
1392 #define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1393 static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
1394 struct sk_buff *resp)
1395 {
1396 u8 status;
1397
1398 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1399
1400 if (IS_ERR(resp))
1401 return PTR_ERR(resp);
1402
1403 status = resp->data[0];
1404 skb_pull(resp, sizeof(status));
1405
1406 if (status != 0) {
1407 nfc_tm_deactivated(dev->nfc_dev);
1408 dev->tgt_mode = 0;
1409 dev_kfree_skb(resp);
1410 return 0;
1411 }
1412
1413 return nfc_tm_data_received(dev->nfc_dev, resp);
1414 }
1415
1416 static void pn533_wq_tg_get_data(struct work_struct *work)
1417 {
1418 struct pn533 *dev = container_of(work, struct pn533, tg_work);
1419
1420 struct sk_buff *skb;
1421 int rc;
1422
1423 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1424
1425 skb = pn533_alloc_skb(dev, 0);
1426 if (!skb)
1427 return;
1428
1429 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1430 pn533_tm_get_data_complete, NULL);
1431
1432 if (rc < 0)
1433 dev_kfree_skb(skb);
1434
1435 return;
1436 }
1437
1438 #define ATR_REQ_GB_OFFSET 17
1439 static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
1440 {
1441 u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
1442 size_t gb_len;
1443 int rc;
1444
1445 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1446
1447 if (resp->len < ATR_REQ_GB_OFFSET + 1)
1448 return -EINVAL;
1449
1450 mode = resp->data[0];
1451 cmd = &resp->data[1];
1452
1453 nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n",
1454 mode, resp->len);
1455
1456 if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1457 PN533_INIT_TARGET_RESP_ACTIVE)
1458 comm_mode = NFC_COMM_ACTIVE;
1459
1460 if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */
1461 return -EOPNOTSUPP;
1462
1463 gb = cmd + ATR_REQ_GB_OFFSET;
1464 gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
1465
1466 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1467 comm_mode, gb, gb_len);
1468 if (rc < 0) {
1469 nfc_dev_err(&dev->interface->dev,
1470 "Error when signaling target activation");
1471 return rc;
1472 }
1473
1474 dev->tgt_mode = 1;
1475 queue_work(dev->wq, &dev->tg_work);
1476
1477 return 0;
1478 }
1479
1480 static void pn533_listen_mode_timer(unsigned long data)
1481 {
1482 struct pn533 *dev = (struct pn533 *)data;
1483
1484 nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
1485
1486 /* An ack will cancel the last issued command (poll) */
1487 pn533_send_ack(dev, GFP_ATOMIC);
1488
1489 dev->cancel_listen = 1;
1490
1491 pn533_poll_next_mod(dev);
1492
1493 queue_work(dev->wq, &dev->poll_work);
1494 }
1495
1496 static int pn533_poll_complete(struct pn533 *dev, void *arg,
1497 struct sk_buff *resp)
1498 {
1499 struct pn533_poll_modulations *cur_mod;
1500 int rc;
1501
1502 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1503
1504 if (IS_ERR(resp)) {
1505 rc = PTR_ERR(resp);
1506
1507 nfc_dev_err(&dev->interface->dev, "%s Poll complete error %d",
1508 __func__, rc);
1509
1510 if (rc == -ENOENT) {
1511 if (dev->poll_mod_count != 0)
1512 return rc;
1513 else
1514 goto stop_poll;
1515 } else if (rc < 0) {
1516 nfc_dev_err(&dev->interface->dev,
1517 "Error %d when running poll", rc);
1518 goto stop_poll;
1519 }
1520 }
1521
1522 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1523
1524 if (cur_mod->len == 0) { /* Target mode */
1525 del_timer(&dev->listen_timer);
1526 rc = pn533_init_target_complete(dev, resp);
1527 goto done;
1528 }
1529
1530 /* Initiator mode */
1531 rc = pn533_start_poll_complete(dev, resp);
1532 if (!rc)
1533 goto done;
1534
1535 if (!dev->poll_mod_count) {
1536 nfc_dev_dbg(&dev->interface->dev, "Polling has been stoped.");
1537 goto done;
1538 }
1539
1540 pn533_poll_next_mod(dev);
1541 queue_work(dev->wq, &dev->poll_work);
1542
1543 done:
1544 dev_kfree_skb(resp);
1545 return rc;
1546
1547 stop_poll:
1548 nfc_dev_err(&dev->interface->dev, "Polling operation has been stopped");
1549
1550 pn533_poll_reset_mod_list(dev);
1551 dev->poll_protocols = 0;
1552 return rc;
1553 }
1554
1555 static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1556 struct pn533_poll_modulations *mod)
1557 {
1558 struct sk_buff *skb;
1559
1560 skb = pn533_alloc_skb(dev, mod->len);
1561 if (!skb)
1562 return NULL;
1563
1564 memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
1565
1566 return skb;
1567 }
1568
1569 static int pn533_send_poll_frame(struct pn533 *dev)
1570 {
1571 struct pn533_poll_modulations *mod;
1572 struct sk_buff *skb;
1573 int rc;
1574 u8 cmd_code;
1575
1576 mod = dev->poll_mod_active[dev->poll_mod_curr];
1577
1578 nfc_dev_dbg(&dev->interface->dev, "%s mod len %d\n",
1579 __func__, mod->len);
1580
1581 if (mod->len == 0) { /* Listen mode */
1582 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
1583 skb = pn533_alloc_poll_tg_frame(dev);
1584 } else { /* Polling mode */
1585 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
1586 skb = pn533_alloc_poll_in_frame(dev, mod);
1587 }
1588
1589 if (!skb) {
1590 nfc_dev_err(&dev->interface->dev, "Failed to allocate skb.");
1591 return -ENOMEM;
1592 }
1593
1594 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1595 NULL);
1596 if (rc < 0) {
1597 dev_kfree_skb(skb);
1598 nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
1599 }
1600
1601 return rc;
1602 }
1603
1604 static void pn533_wq_poll(struct work_struct *work)
1605 {
1606 struct pn533 *dev = container_of(work, struct pn533, poll_work);
1607 struct pn533_poll_modulations *cur_mod;
1608 int rc;
1609
1610 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1611
1612 nfc_dev_dbg(&dev->interface->dev,
1613 "%s cancel_listen %d modulation len %d",
1614 __func__, dev->cancel_listen, cur_mod->len);
1615
1616 if (dev->cancel_listen == 1) {
1617 dev->cancel_listen = 0;
1618 usb_kill_urb(dev->in_urb);
1619 }
1620
1621 rc = pn533_send_poll_frame(dev);
1622 if (rc)
1623 return;
1624
1625 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1626 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1627
1628 return;
1629 }
1630
1631 static int pn533_start_poll(struct nfc_dev *nfc_dev,
1632 u32 im_protocols, u32 tm_protocols)
1633 {
1634 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1635
1636 nfc_dev_dbg(&dev->interface->dev,
1637 "%s: im protocols 0x%x tm protocols 0x%x",
1638 __func__, im_protocols, tm_protocols);
1639
1640 if (dev->tgt_active_prot) {
1641 nfc_dev_err(&dev->interface->dev,
1642 "Cannot poll with a target already activated");
1643 return -EBUSY;
1644 }
1645
1646 if (dev->tgt_mode) {
1647 nfc_dev_err(&dev->interface->dev,
1648 "Cannot poll while already being activated");
1649 return -EBUSY;
1650 }
1651
1652 if (tm_protocols) {
1653 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1654 if (dev->gb == NULL)
1655 tm_protocols = 0;
1656 }
1657
1658 dev->poll_mod_curr = 0;
1659 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1660 dev->poll_protocols = im_protocols;
1661 dev->listen_protocols = tm_protocols;
1662
1663 return pn533_send_poll_frame(dev);
1664 }
1665
1666 static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1667 {
1668 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1669
1670 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1671
1672 del_timer(&dev->listen_timer);
1673
1674 if (!dev->poll_mod_count) {
1675 nfc_dev_dbg(&dev->interface->dev,
1676 "Polling operation was not running");
1677 return;
1678 }
1679
1680 /* An ack will cancel the last issued command (poll) */
1681 pn533_send_ack(dev, GFP_KERNEL);
1682
1683 /* prevent pn533_start_poll_complete to issue a new poll meanwhile */
1684 usb_kill_urb(dev->in_urb);
1685
1686 pn533_poll_reset_mod_list(dev);
1687 }
1688
1689 static int pn533_activate_target_nfcdep(struct pn533 *dev)
1690 {
1691 struct pn533_cmd_activate_response *rsp;
1692 u16 gt_len;
1693 int rc;
1694
1695 struct sk_buff *skb;
1696 struct sk_buff *resp;
1697
1698 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1699
1700 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
1701 if (!skb)
1702 return -ENOMEM;
1703
1704 *skb_put(skb, sizeof(u8)) = 1; /* TG */
1705 *skb_put(skb, sizeof(u8)) = 0; /* Next */
1706
1707 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1708 if (IS_ERR(resp))
1709 return PTR_ERR(resp);
1710
1711 rsp = (struct pn533_cmd_activate_response *)resp->data;
1712 rc = rsp->status & PN533_CMD_RET_MASK;
1713 if (rc != PN533_CMD_RET_SUCCESS) {
1714 nfc_dev_err(&dev->interface->dev,
1715 "Target activation failed (error 0x%x)", rc);
1716 dev_kfree_skb(resp);
1717 return -EIO;
1718 }
1719
1720 /* ATR_RES general bytes are located at offset 16 */
1721 gt_len = resp->len - 16;
1722 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
1723
1724 dev_kfree_skb(resp);
1725 return rc;
1726 }
1727
1728 static int pn533_activate_target(struct nfc_dev *nfc_dev,
1729 struct nfc_target *target, u32 protocol)
1730 {
1731 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1732 int rc;
1733
1734 nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
1735 protocol);
1736
1737 if (dev->poll_mod_count) {
1738 nfc_dev_err(&dev->interface->dev,
1739 "Cannot activate while polling");
1740 return -EBUSY;
1741 }
1742
1743 if (dev->tgt_active_prot) {
1744 nfc_dev_err(&dev->interface->dev,
1745 "There is already an active target");
1746 return -EBUSY;
1747 }
1748
1749 if (!dev->tgt_available_prots) {
1750 nfc_dev_err(&dev->interface->dev,
1751 "There is no available target to activate");
1752 return -EINVAL;
1753 }
1754
1755 if (!(dev->tgt_available_prots & (1 << protocol))) {
1756 nfc_dev_err(&dev->interface->dev,
1757 "Target doesn't support requested proto %u",
1758 protocol);
1759 return -EINVAL;
1760 }
1761
1762 if (protocol == NFC_PROTO_NFC_DEP) {
1763 rc = pn533_activate_target_nfcdep(dev);
1764 if (rc) {
1765 nfc_dev_err(&dev->interface->dev,
1766 "Activating target with DEP failed %d", rc);
1767 return rc;
1768 }
1769 }
1770
1771 dev->tgt_active_prot = protocol;
1772 dev->tgt_available_prots = 0;
1773
1774 return 0;
1775 }
1776
1777 static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1778 struct nfc_target *target)
1779 {
1780 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1781
1782 struct sk_buff *skb;
1783 struct sk_buff *resp;
1784
1785 int rc;
1786
1787 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1788
1789 if (!dev->tgt_active_prot) {
1790 nfc_dev_err(&dev->interface->dev, "There is no active target");
1791 return;
1792 }
1793
1794 dev->tgt_active_prot = 0;
1795 skb_queue_purge(&dev->resp_q);
1796
1797 skb = pn533_alloc_skb(dev, sizeof(u8));
1798 if (!skb)
1799 return;
1800
1801 *skb_put(skb, 1) = 1; /* TG*/
1802
1803 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
1804 if (IS_ERR(resp))
1805 return;
1806
1807 rc = resp->data[0] & PN533_CMD_RET_MASK;
1808 if (rc != PN533_CMD_RET_SUCCESS)
1809 nfc_dev_err(&dev->interface->dev,
1810 "Error 0x%x when releasing the target", rc);
1811
1812 dev_kfree_skb(resp);
1813 return;
1814 }
1815
1816
1817 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
1818 struct sk_buff *resp)
1819 {
1820 struct pn533_cmd_jump_dep_response *rsp;
1821 u8 target_gt_len;
1822 int rc;
1823 u8 active = *(u8 *)arg;
1824
1825 kfree(arg);
1826
1827 if (IS_ERR(resp))
1828 return PTR_ERR(resp);
1829
1830 if (dev->tgt_available_prots &&
1831 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1832 nfc_dev_err(&dev->interface->dev,
1833 "The target does not support DEP");
1834 rc = -EINVAL;
1835 goto error;
1836 }
1837
1838 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1839
1840 rc = rsp->status & PN533_CMD_RET_MASK;
1841 if (rc != PN533_CMD_RET_SUCCESS) {
1842 nfc_dev_err(&dev->interface->dev,
1843 "Bringing DEP link up failed (error 0x%x)", rc);
1844 goto error;
1845 }
1846
1847 if (!dev->tgt_available_prots) {
1848 struct nfc_target nfc_target;
1849
1850 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
1851
1852 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1853 nfc_target.nfcid1_len = 10;
1854 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
1855 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1856 if (rc)
1857 goto error;
1858
1859 dev->tgt_available_prots = 0;
1860 }
1861
1862 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1863
1864 /* ATR_RES general bytes are located at offset 17 */
1865 target_gt_len = resp->len - 17;
1866 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1867 rsp->gt, target_gt_len);
1868 if (rc == 0)
1869 rc = nfc_dep_link_is_up(dev->nfc_dev,
1870 dev->nfc_dev->targets[0].idx,
1871 !active, NFC_RF_INITIATOR);
1872
1873 error:
1874 dev_kfree_skb(resp);
1875 return rc;
1876 }
1877
1878 static int pn533_mod_to_baud(struct pn533 *dev)
1879 {
1880 switch (dev->poll_mod_curr) {
1881 case PN533_POLL_MOD_106KBPS_A:
1882 return 0;
1883 case PN533_POLL_MOD_212KBPS_FELICA:
1884 return 1;
1885 case PN533_POLL_MOD_424KBPS_FELICA:
1886 return 2;
1887 default:
1888 return -EINVAL;
1889 }
1890 }
1891
1892 #define PASSIVE_DATA_LEN 5
1893 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
1894 u8 comm_mode, u8 *gb, size_t gb_len)
1895 {
1896 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1897 struct sk_buff *skb;
1898 int rc, baud, skb_len;
1899 u8 *next, *arg;
1900
1901 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
1902
1903 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1904
1905 if (dev->poll_mod_count) {
1906 nfc_dev_err(&dev->interface->dev,
1907 "Cannot bring the DEP link up while polling");
1908 return -EBUSY;
1909 }
1910
1911 if (dev->tgt_active_prot) {
1912 nfc_dev_err(&dev->interface->dev,
1913 "There is already an active target");
1914 return -EBUSY;
1915 }
1916
1917 baud = pn533_mod_to_baud(dev);
1918 if (baud < 0) {
1919 nfc_dev_err(&dev->interface->dev,
1920 "Invalid curr modulation %d", dev->poll_mod_curr);
1921 return baud;
1922 }
1923
1924 skb_len = 3 + gb_len; /* ActPass + BR + Next */
1925 if (comm_mode == NFC_COMM_PASSIVE)
1926 skb_len += PASSIVE_DATA_LEN;
1927
1928 skb = pn533_alloc_skb(dev, skb_len);
1929 if (!skb)
1930 return -ENOMEM;
1931
1932 *skb_put(skb, 1) = !comm_mode; /* ActPass */
1933 *skb_put(skb, 1) = baud; /* Baud rate */
1934
1935 next = skb_put(skb, 1); /* Next */
1936 *next = 0;
1937
1938 if (comm_mode == NFC_COMM_PASSIVE && baud > 0) {
1939 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data,
1940 PASSIVE_DATA_LEN);
1941 *next |= 1;
1942 }
1943
1944 if (gb != NULL && gb_len > 0) {
1945 memcpy(skb_put(skb, gb_len), gb, gb_len);
1946 *next |= 4; /* We have some Gi */
1947 } else {
1948 *next = 0;
1949 }
1950
1951 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
1952 if (!arg) {
1953 dev_kfree_skb(skb);
1954 return -ENOMEM;
1955 }
1956
1957 *arg = !comm_mode;
1958
1959 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
1960 pn533_in_dep_link_up_complete, arg);
1961
1962 if (rc < 0) {
1963 dev_kfree_skb(skb);
1964 kfree(arg);
1965 }
1966
1967 return rc;
1968 }
1969
1970 static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
1971 {
1972 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1973
1974 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1975
1976 pn533_poll_reset_mod_list(dev);
1977
1978 if (dev->tgt_mode || dev->tgt_active_prot) {
1979 pn533_send_ack(dev, GFP_KERNEL);
1980 usb_kill_urb(dev->in_urb);
1981 }
1982
1983 dev->tgt_active_prot = 0;
1984 dev->tgt_mode = 0;
1985
1986 skb_queue_purge(&dev->resp_q);
1987
1988 return 0;
1989 }
1990
1991 struct pn533_data_exchange_arg {
1992 data_exchange_cb_t cb;
1993 void *cb_context;
1994 };
1995
1996 static struct sk_buff *pn533_build_response(struct pn533 *dev)
1997 {
1998 struct sk_buff *skb, *tmp, *t;
1999 unsigned int skb_len = 0, tmp_len = 0;
2000
2001 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2002
2003 if (skb_queue_empty(&dev->resp_q))
2004 return NULL;
2005
2006 if (skb_queue_len(&dev->resp_q) == 1) {
2007 skb = skb_dequeue(&dev->resp_q);
2008 goto out;
2009 }
2010
2011 skb_queue_walk_safe(&dev->resp_q, tmp, t)
2012 skb_len += tmp->len;
2013
2014 nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
2015 __func__, skb_len);
2016
2017 skb = alloc_skb(skb_len, GFP_KERNEL);
2018 if (skb == NULL)
2019 goto out;
2020
2021 skb_put(skb, skb_len);
2022
2023 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2024 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2025 tmp_len += tmp->len;
2026 }
2027
2028 out:
2029 skb_queue_purge(&dev->resp_q);
2030
2031 return skb;
2032 }
2033
2034 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
2035 struct sk_buff *resp)
2036 {
2037 struct pn533_data_exchange_arg *arg = _arg;
2038 struct sk_buff *skb;
2039 int rc = 0;
2040 u8 status, ret, mi;
2041
2042 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2043
2044 if (IS_ERR(resp)) {
2045 rc = PTR_ERR(resp);
2046 goto _error;
2047 }
2048
2049 status = resp->data[0];
2050 ret = status & PN533_CMD_RET_MASK;
2051 mi = status & PN533_CMD_MI_MASK;
2052
2053 skb_pull(resp, sizeof(status));
2054
2055 if (ret != PN533_CMD_RET_SUCCESS) {
2056 nfc_dev_err(&dev->interface->dev,
2057 "Exchanging data failed (error 0x%x)", ret);
2058 rc = -EIO;
2059 goto error;
2060 }
2061
2062 skb_queue_tail(&dev->resp_q, resp);
2063
2064 if (mi) {
2065 dev->cmd_complete_mi_arg = arg;
2066 queue_work(dev->wq, &dev->mi_work);
2067 return -EINPROGRESS;
2068 }
2069
2070 skb = pn533_build_response(dev);
2071 if (!skb)
2072 goto error;
2073
2074 arg->cb(arg->cb_context, skb, 0);
2075 kfree(arg);
2076 return 0;
2077
2078 error:
2079 dev_kfree_skb(resp);
2080 _error:
2081 skb_queue_purge(&dev->resp_q);
2082 arg->cb(arg->cb_context, NULL, rc);
2083 kfree(arg);
2084 return rc;
2085 }
2086
2087 static int pn533_transceive(struct nfc_dev *nfc_dev,
2088 struct nfc_target *target, struct sk_buff *skb,
2089 data_exchange_cb_t cb, void *cb_context)
2090 {
2091 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2092 struct pn533_data_exchange_arg *arg = NULL;
2093 int rc;
2094
2095 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2096
2097 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2098 /* TODO: Implement support to multi-part data exchange */
2099 nfc_dev_err(&dev->interface->dev,
2100 "Data length greater than the max allowed: %d",
2101 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2102 rc = -ENOSYS;
2103 goto error;
2104 }
2105
2106 if (!dev->tgt_active_prot) {
2107 nfc_dev_err(&dev->interface->dev,
2108 "Can't exchange data if there is no active target");
2109 rc = -EINVAL;
2110 goto error;
2111 }
2112
2113 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2114 if (!arg) {
2115 rc = -ENOMEM;
2116 goto error;
2117 }
2118
2119 arg->cb = cb;
2120 arg->cb_context = cb_context;
2121
2122 switch (dev->device_type) {
2123 case PN533_DEVICE_PASORI:
2124 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2125 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2126 skb,
2127 pn533_data_exchange_complete,
2128 arg);
2129
2130 break;
2131 }
2132 default:
2133 *skb_push(skb, sizeof(u8)) = 1; /*TG*/
2134
2135 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2136 skb, pn533_data_exchange_complete,
2137 arg);
2138
2139 break;
2140 }
2141
2142 if (rc < 0) /* rc from send_async */
2143 goto error;
2144
2145 return 0;
2146
2147 error:
2148 kfree(arg);
2149 dev_kfree_skb(skb);
2150 return rc;
2151 }
2152
2153 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
2154 struct sk_buff *resp)
2155 {
2156 u8 status;
2157
2158 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2159
2160 if (IS_ERR(resp))
2161 return PTR_ERR(resp);
2162
2163 status = resp->data[0];
2164
2165 dev_kfree_skb(resp);
2166
2167 if (status != 0) {
2168 nfc_tm_deactivated(dev->nfc_dev);
2169
2170 dev->tgt_mode = 0;
2171
2172 return 0;
2173 }
2174
2175 queue_work(dev->wq, &dev->tg_work);
2176
2177 return 0;
2178 }
2179
2180 static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2181 {
2182 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2183 int rc;
2184
2185 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2186
2187 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2188 nfc_dev_err(&dev->interface->dev,
2189 "Data length greater than the max allowed: %d",
2190 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2191 return -ENOSYS;
2192 }
2193
2194 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2195 pn533_tm_send_complete, NULL);
2196 if (rc < 0)
2197 dev_kfree_skb(skb);
2198
2199 return rc;
2200 }
2201
2202 static void pn533_wq_mi_recv(struct work_struct *work)
2203 {
2204 struct pn533 *dev = container_of(work, struct pn533, mi_work);
2205
2206 struct sk_buff *skb;
2207 int rc;
2208
2209 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2210
2211 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
2212 if (!skb)
2213 goto error;
2214
2215 switch (dev->device_type) {
2216 case PN533_DEVICE_PASORI:
2217 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2218 rc = pn533_send_cmd_direct_async(dev,
2219 PN533_CMD_IN_COMM_THRU,
2220 skb,
2221 pn533_data_exchange_complete,
2222 dev->cmd_complete_mi_arg);
2223
2224 break;
2225 }
2226 default:
2227 *skb_put(skb, sizeof(u8)) = 1; /*TG*/
2228
2229 rc = pn533_send_cmd_direct_async(dev,
2230 PN533_CMD_IN_DATA_EXCHANGE,
2231 skb,
2232 pn533_data_exchange_complete,
2233 dev->cmd_complete_mi_arg);
2234
2235 break;
2236 }
2237
2238 if (rc == 0) /* success */
2239 return;
2240
2241 nfc_dev_err(&dev->interface->dev,
2242 "Error %d when trying to perform data_exchange", rc);
2243
2244 dev_kfree_skb(skb);
2245 kfree(dev->cmd_complete_mi_arg);
2246
2247 error:
2248 pn533_send_ack(dev, GFP_KERNEL);
2249 queue_work(dev->wq, &dev->cmd_work);
2250 }
2251
2252 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2253 u8 cfgdata_len)
2254 {
2255 struct sk_buff *skb;
2256 struct sk_buff *resp;
2257
2258 int skb_len;
2259
2260 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2261
2262 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
2263
2264 skb = pn533_alloc_skb(dev, skb_len);
2265 if (!skb)
2266 return -ENOMEM;
2267
2268 *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2269 memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
2270
2271 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2272 if (IS_ERR(resp))
2273 return PTR_ERR(resp);
2274
2275 dev_kfree_skb(resp);
2276 return 0;
2277 }
2278
2279 static int pn533_get_firmware_version(struct pn533 *dev,
2280 struct pn533_fw_version *fv)
2281 {
2282 struct sk_buff *skb;
2283 struct sk_buff *resp;
2284
2285 skb = pn533_alloc_skb(dev, 0);
2286 if (!skb)
2287 return -ENOMEM;
2288
2289 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2290 if (IS_ERR(resp))
2291 return PTR_ERR(resp);
2292
2293 fv->ic = resp->data[0];
2294 fv->ver = resp->data[1];
2295 fv->rev = resp->data[2];
2296 fv->support = resp->data[3];
2297
2298 dev_kfree_skb(resp);
2299 return 0;
2300 }
2301
2302 static int pn533_pasori_fw_reset(struct pn533 *dev)
2303 {
2304 struct sk_buff *skb;
2305 struct sk_buff *resp;
2306
2307 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2308
2309 skb = pn533_alloc_skb(dev, sizeof(u8));
2310 if (!skb)
2311 return -ENOMEM;
2312
2313 *skb_put(skb, sizeof(u8)) = 0x1;
2314
2315 resp = pn533_send_cmd_sync(dev, 0x18, skb);
2316 if (IS_ERR(resp))
2317 return PTR_ERR(resp);
2318
2319 dev_kfree_skb(resp);
2320
2321 return 0;
2322 }
2323
2324 static struct nfc_ops pn533_nfc_ops = {
2325 .dev_up = NULL,
2326 .dev_down = NULL,
2327 .dep_link_up = pn533_dep_link_up,
2328 .dep_link_down = pn533_dep_link_down,
2329 .start_poll = pn533_start_poll,
2330 .stop_poll = pn533_stop_poll,
2331 .activate_target = pn533_activate_target,
2332 .deactivate_target = pn533_deactivate_target,
2333 .im_transceive = pn533_transceive,
2334 .tm_send = pn533_tm_send,
2335 };
2336
2337 static int pn533_setup(struct pn533 *dev)
2338 {
2339 struct pn533_config_max_retries max_retries;
2340 struct pn533_config_timing timing;
2341 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2342 int rc;
2343
2344 switch (dev->device_type) {
2345 case PN533_DEVICE_STD:
2346 max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
2347 max_retries.mx_rty_psl = 2;
2348 max_retries.mx_rty_passive_act =
2349 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2350
2351 timing.rfu = PN533_CONFIG_TIMING_102;
2352 timing.atr_res_timeout = PN533_CONFIG_TIMING_204;
2353 timing.dep_timeout = PN533_CONFIG_TIMING_409;
2354
2355 break;
2356
2357 case PN533_DEVICE_PASORI:
2358 max_retries.mx_rty_atr = 0x2;
2359 max_retries.mx_rty_psl = 0x1;
2360 max_retries.mx_rty_passive_act =
2361 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2362
2363 timing.rfu = PN533_CONFIG_TIMING_102;
2364 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2365 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2366
2367 break;
2368
2369 default:
2370 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2371 dev->device_type);
2372 return -EINVAL;
2373 }
2374
2375 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2376 (u8 *)&max_retries, sizeof(max_retries));
2377 if (rc) {
2378 nfc_dev_err(&dev->interface->dev,
2379 "Error on setting MAX_RETRIES config");
2380 return rc;
2381 }
2382
2383
2384 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2385 (u8 *)&timing, sizeof(timing));
2386 if (rc) {
2387 nfc_dev_err(&dev->interface->dev,
2388 "Error on setting RF timings");
2389 return rc;
2390 }
2391
2392 switch (dev->device_type) {
2393 case PN533_DEVICE_STD:
2394 break;
2395
2396 case PN533_DEVICE_PASORI:
2397 pn533_pasori_fw_reset(dev);
2398
2399 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2400 pasori_cfg, 3);
2401 if (rc) {
2402 nfc_dev_err(&dev->interface->dev,
2403 "Error while settings PASORI config");
2404 return rc;
2405 }
2406
2407 pn533_pasori_fw_reset(dev);
2408
2409 break;
2410 }
2411
2412 return 0;
2413 }
2414
2415 static int pn533_probe(struct usb_interface *interface,
2416 const struct usb_device_id *id)
2417 {
2418 struct pn533_fw_version fw_ver;
2419 struct pn533 *dev;
2420 struct usb_host_interface *iface_desc;
2421 struct usb_endpoint_descriptor *endpoint;
2422 int in_endpoint = 0;
2423 int out_endpoint = 0;
2424 int rc = -ENOMEM;
2425 int i;
2426 u32 protocols;
2427
2428 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2429 if (!dev)
2430 return -ENOMEM;
2431
2432 dev->udev = usb_get_dev(interface_to_usbdev(interface));
2433 dev->interface = interface;
2434 mutex_init(&dev->cmd_lock);
2435
2436 iface_desc = interface->cur_altsetting;
2437 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2438 endpoint = &iface_desc->endpoint[i].desc;
2439
2440 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
2441 in_endpoint = endpoint->bEndpointAddress;
2442
2443 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
2444 out_endpoint = endpoint->bEndpointAddress;
2445 }
2446
2447 if (!in_endpoint || !out_endpoint) {
2448 nfc_dev_err(&interface->dev,
2449 "Could not find bulk-in or bulk-out endpoint");
2450 rc = -ENODEV;
2451 goto error;
2452 }
2453
2454 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
2455 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
2456
2457 if (!dev->in_urb || !dev->out_urb)
2458 goto error;
2459
2460 usb_fill_bulk_urb(dev->in_urb, dev->udev,
2461 usb_rcvbulkpipe(dev->udev, in_endpoint),
2462 NULL, 0, NULL, dev);
2463 usb_fill_bulk_urb(dev->out_urb, dev->udev,
2464 usb_sndbulkpipe(dev->udev, out_endpoint),
2465 NULL, 0, pn533_send_complete, dev);
2466
2467 INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
2468 INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
2469 INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
2470 INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
2471 INIT_WORK(&dev->poll_work, pn533_wq_poll);
2472 dev->wq = alloc_ordered_workqueue("pn533", 0);
2473 if (dev->wq == NULL)
2474 goto error;
2475
2476 init_timer(&dev->listen_timer);
2477 dev->listen_timer.data = (unsigned long) dev;
2478 dev->listen_timer.function = pn533_listen_mode_timer;
2479
2480 skb_queue_head_init(&dev->resp_q);
2481
2482 INIT_LIST_HEAD(&dev->cmd_queue);
2483
2484 usb_set_intfdata(interface, dev);
2485
2486 dev->ops = &pn533_std_frame_ops;
2487
2488 dev->device_type = id->driver_info;
2489 switch (dev->device_type) {
2490 case PN533_DEVICE_STD:
2491 protocols = PN533_ALL_PROTOCOLS;
2492 break;
2493
2494 case PN533_DEVICE_PASORI:
2495 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2496 break;
2497
2498 default:
2499 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2500 dev->device_type);
2501 rc = -EINVAL;
2502 goto destroy_wq;
2503 }
2504
2505 memset(&fw_ver, 0, sizeof(fw_ver));
2506 rc = pn533_get_firmware_version(dev, &fw_ver);
2507 if (rc < 0)
2508 goto destroy_wq;
2509
2510 nfc_dev_info(&dev->interface->dev,
2511 "NXP PN533 firmware ver %d.%d now attached",
2512 fw_ver.ver, fw_ver.rev);
2513
2514
2515 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
2516 NFC_SE_NONE,
2517 dev->ops->tx_header_len +
2518 PN533_CMD_DATAEXCH_HEAD_LEN,
2519 dev->ops->tx_tail_len);
2520 if (!dev->nfc_dev)
2521 goto destroy_wq;
2522
2523 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
2524 nfc_set_drvdata(dev->nfc_dev, dev);
2525
2526 rc = nfc_register_device(dev->nfc_dev);
2527 if (rc)
2528 goto free_nfc_dev;
2529
2530 rc = pn533_setup(dev);
2531 if (rc)
2532 goto unregister_nfc_dev;
2533
2534 return 0;
2535
2536 unregister_nfc_dev:
2537 nfc_unregister_device(dev->nfc_dev);
2538
2539 free_nfc_dev:
2540 nfc_free_device(dev->nfc_dev);
2541
2542 destroy_wq:
2543 destroy_workqueue(dev->wq);
2544 error:
2545 usb_free_urb(dev->in_urb);
2546 usb_free_urb(dev->out_urb);
2547 kfree(dev);
2548 return rc;
2549 }
2550
2551 static void pn533_disconnect(struct usb_interface *interface)
2552 {
2553 struct pn533 *dev;
2554 struct pn533_cmd *cmd, *n;
2555
2556 dev = usb_get_intfdata(interface);
2557 usb_set_intfdata(interface, NULL);
2558
2559 nfc_unregister_device(dev->nfc_dev);
2560 nfc_free_device(dev->nfc_dev);
2561
2562 usb_kill_urb(dev->in_urb);
2563 usb_kill_urb(dev->out_urb);
2564
2565 destroy_workqueue(dev->wq);
2566
2567 skb_queue_purge(&dev->resp_q);
2568
2569 del_timer(&dev->listen_timer);
2570
2571 list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
2572 list_del(&cmd->queue);
2573 kfree(cmd);
2574 }
2575
2576 usb_free_urb(dev->in_urb);
2577 usb_free_urb(dev->out_urb);
2578 kfree(dev);
2579
2580 nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
2581 }
2582
2583 static struct usb_driver pn533_driver = {
2584 .name = "pn533",
2585 .probe = pn533_probe,
2586 .disconnect = pn533_disconnect,
2587 .id_table = pn533_table,
2588 };
2589
2590 module_usb_driver(pn533_driver);
2591
2592 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
2593 MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2594 MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
2595 MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
2596 MODULE_VERSION(VERSION);
2597 MODULE_LICENSE("GPL");
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