]> git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - drivers/nfc/pn533.c
projects / mirror_ubuntu-zesty-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
NFC: pn533: Add pn533_abort_cmd procedure
[mirror_ubuntu-zesty-kernel.git] / drivers / nfc / pn533.c
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 ACS_VENDOR_ID 0x072f
42 #define ACR122U_PRODUCT_ID 0x2200
43
44 #define PN533_DEVICE_STD 0x1
45 #define PN533_DEVICE_PASORI 0x2
46 #define PN533_DEVICE_ACR122U 0x3
47
48 #define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\
49 NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\
50 NFC_PROTO_NFC_DEP_MASK |\
51 NFC_PROTO_ISO14443_B_MASK)
52
53 #define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
54 NFC_PROTO_MIFARE_MASK | \
55 NFC_PROTO_FELICA_MASK | \
56 NFC_PROTO_ISO14443_MASK | \
57 NFC_PROTO_NFC_DEP_MASK)
58
59 static const struct usb_device_id pn533_table[] = {
60 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
61 .idVendor = PN533_VENDOR_ID,
62 .idProduct = PN533_PRODUCT_ID,
63 .driver_info = PN533_DEVICE_STD,
64 },
65 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
66 .idVendor = SCM_VENDOR_ID,
67 .idProduct = SCL3711_PRODUCT_ID,
68 .driver_info = PN533_DEVICE_STD,
69 },
70 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
71 .idVendor = SONY_VENDOR_ID,
72 .idProduct = PASORI_PRODUCT_ID,
73 .driver_info = PN533_DEVICE_PASORI,
74 },
75 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
76 .idVendor = ACS_VENDOR_ID,
77 .idProduct = ACR122U_PRODUCT_ID,
78 .driver_info = PN533_DEVICE_ACR122U,
79 },
80 { }
81 };
82 MODULE_DEVICE_TABLE(usb, pn533_table);
83
84 /* How much time we spend listening for initiators */
85 #define PN533_LISTEN_TIME 2
86
87 /* Standard pn533 frame definitions */
88 #define PN533_STD_FRAME_HEADER_LEN (sizeof(struct pn533_std_frame) \
89 + 2) /* data[0] TFI, data[1] CC */
90 #define PN533_STD_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
91
92 /*
93 * Max extended frame payload len, excluding TFI and CC
94 * which are already in PN533_FRAME_HEADER_LEN.
95 */
96 #define PN533_STD_FRAME_MAX_PAYLOAD_LEN 263
97
98 #define PN533_STD_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
99 Postamble (1) */
100 #define PN533_STD_FRAME_CHECKSUM(f) (f->data[f->datalen])
101 #define PN533_STD_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
102
103 /* start of frame */
104 #define PN533_STD_FRAME_SOF 0x00FF
105
106 /* standard frame identifier: in/out/error */
107 #define PN533_STD_FRAME_IDENTIFIER(f) (f->data[0]) /* TFI */
108 #define PN533_STD_FRAME_DIR_OUT 0xD4
109 #define PN533_STD_FRAME_DIR_IN 0xD5
110
111 /* ACS ACR122 pn533 frame definitions */
112 #define PN533_ACR122_TX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_tx_frame) \
113 + 2)
114 #define PN533_ACR122_TX_FRAME_TAIL_LEN 0
115 #define PN533_ACR122_RX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_rx_frame) \
116 + 2)
117 #define PN533_ACR122_RX_FRAME_TAIL_LEN 2
118 #define PN533_ACR122_FRAME_MAX_PAYLOAD_LEN PN533_STD_FRAME_MAX_PAYLOAD_LEN
119
120 /* CCID messages types */
121 #define PN533_ACR122_PC_TO_RDR_ICCPOWERON 0x62
122 #define PN533_ACR122_PC_TO_RDR_ESCAPE 0x6B
123
124 #define PN533_ACR122_RDR_TO_PC_ESCAPE 0x83
125
126 /* PN533 Commands */
127 #define PN533_STD_FRAME_CMD(f) (f->data[1])
128
129 #define PN533_CMD_GET_FIRMWARE_VERSION 0x02
130 #define PN533_CMD_RF_CONFIGURATION 0x32
131 #define PN533_CMD_IN_DATA_EXCHANGE 0x40
132 #define PN533_CMD_IN_COMM_THRU 0x42
133 #define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
134 #define PN533_CMD_IN_ATR 0x50
135 #define PN533_CMD_IN_RELEASE 0x52
136 #define PN533_CMD_IN_JUMP_FOR_DEP 0x56
137
138 #define PN533_CMD_TG_INIT_AS_TARGET 0x8c
139 #define PN533_CMD_TG_GET_DATA 0x86
140 #define PN533_CMD_TG_SET_DATA 0x8e
141 #define PN533_CMD_UNDEF 0xff
142
143 #define PN533_CMD_RESPONSE(cmd) (cmd + 1)
144
145 /* PN533 Return codes */
146 #define PN533_CMD_RET_MASK 0x3F
147 #define PN533_CMD_MI_MASK 0x40
148 #define PN533_CMD_RET_SUCCESS 0x00
149
150 struct pn533;
151
152 typedef int (*pn533_cmd_complete_t) (struct pn533 *dev, void *arg, int status);
153
154 typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg,
155 struct sk_buff *resp);
156
157 /* structs for pn533 commands */
158
159 /* PN533_CMD_GET_FIRMWARE_VERSION */
160 struct pn533_fw_version {
161 u8 ic;
162 u8 ver;
163 u8 rev;
164 u8 support;
165 };
166
167 /* PN533_CMD_RF_CONFIGURATION */
168 #define PN533_CFGITEM_TIMING 0x02
169 #define PN533_CFGITEM_MAX_RETRIES 0x05
170 #define PN533_CFGITEM_PASORI 0x82
171
172 #define PN533_CONFIG_TIMING_102 0xb
173 #define PN533_CONFIG_TIMING_204 0xc
174 #define PN533_CONFIG_TIMING_409 0xd
175 #define PN533_CONFIG_TIMING_819 0xe
176
177 #define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
178 #define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
179
180 struct pn533_config_max_retries {
181 u8 mx_rty_atr;
182 u8 mx_rty_psl;
183 u8 mx_rty_passive_act;
184 } __packed;
185
186 struct pn533_config_timing {
187 u8 rfu;
188 u8 atr_res_timeout;
189 u8 dep_timeout;
190 } __packed;
191
192 /* PN533_CMD_IN_LIST_PASSIVE_TARGET */
193
194 /* felica commands opcode */
195 #define PN533_FELICA_OPC_SENSF_REQ 0
196 #define PN533_FELICA_OPC_SENSF_RES 1
197 /* felica SENSF_REQ parameters */
198 #define PN533_FELICA_SENSF_SC_ALL 0xFFFF
199 #define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
200 #define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
201 #define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
202
203 /* type B initiator_data values */
204 #define PN533_TYPE_B_AFI_ALL_FAMILIES 0
205 #define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
206 #define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
207
208 union pn533_cmd_poll_initdata {
209 struct {
210 u8 afi;
211 u8 polling_method;
212 } __packed type_b;
213 struct {
214 u8 opcode;
215 __be16 sc;
216 u8 rc;
217 u8 tsn;
218 } __packed felica;
219 };
220
221 /* Poll modulations */
222 enum {
223 PN533_POLL_MOD_106KBPS_A,
224 PN533_POLL_MOD_212KBPS_FELICA,
225 PN533_POLL_MOD_424KBPS_FELICA,
226 PN533_POLL_MOD_106KBPS_JEWEL,
227 PN533_POLL_MOD_847KBPS_B,
228 PN533_LISTEN_MOD,
229
230 __PN533_POLL_MOD_AFTER_LAST,
231 };
232 #define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
233
234 struct pn533_poll_modulations {
235 struct {
236 u8 maxtg;
237 u8 brty;
238 union pn533_cmd_poll_initdata initiator_data;
239 } __packed data;
240 u8 len;
241 };
242
243 static const struct pn533_poll_modulations poll_mod[] = {
244 [PN533_POLL_MOD_106KBPS_A] = {
245 .data = {
246 .maxtg = 1,
247 .brty = 0,
248 },
249 .len = 2,
250 },
251 [PN533_POLL_MOD_212KBPS_FELICA] = {
252 .data = {
253 .maxtg = 1,
254 .brty = 1,
255 .initiator_data.felica = {
256 .opcode = PN533_FELICA_OPC_SENSF_REQ,
257 .sc = PN533_FELICA_SENSF_SC_ALL,
258 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
259 .tsn = 0,
260 },
261 },
262 .len = 7,
263 },
264 [PN533_POLL_MOD_424KBPS_FELICA] = {
265 .data = {
266 .maxtg = 1,
267 .brty = 2,
268 .initiator_data.felica = {
269 .opcode = PN533_FELICA_OPC_SENSF_REQ,
270 .sc = PN533_FELICA_SENSF_SC_ALL,
271 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
272 .tsn = 0,
273 },
274 },
275 .len = 7,
276 },
277 [PN533_POLL_MOD_106KBPS_JEWEL] = {
278 .data = {
279 .maxtg = 1,
280 .brty = 4,
281 },
282 .len = 2,
283 },
284 [PN533_POLL_MOD_847KBPS_B] = {
285 .data = {
286 .maxtg = 1,
287 .brty = 8,
288 .initiator_data.type_b = {
289 .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
290 .polling_method =
291 PN533_TYPE_B_POLL_METHOD_TIMESLOT,
292 },
293 },
294 .len = 3,
295 },
296 [PN533_LISTEN_MOD] = {
297 .len = 0,
298 },
299 };
300
301 /* PN533_CMD_IN_ATR */
302
303 struct pn533_cmd_activate_response {
304 u8 status;
305 u8 nfcid3t[10];
306 u8 didt;
307 u8 bst;
308 u8 brt;
309 u8 to;
310 u8 ppt;
311 /* optional */
312 u8 gt[];
313 } __packed;
314
315 struct pn533_cmd_jump_dep_response {
316 u8 status;
317 u8 tg;
318 u8 nfcid3t[10];
319 u8 didt;
320 u8 bst;
321 u8 brt;
322 u8 to;
323 u8 ppt;
324 /* optional */
325 u8 gt[];
326 } __packed;
327
328
329 /* PN533_TG_INIT_AS_TARGET */
330 #define PN533_INIT_TARGET_PASSIVE 0x1
331 #define PN533_INIT_TARGET_DEP 0x2
332
333 #define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
334 #define PN533_INIT_TARGET_RESP_ACTIVE 0x1
335 #define PN533_INIT_TARGET_RESP_DEP 0x4
336
337 enum pn533_protocol_type {
338 PN533_PROTO_REQ_ACK_RESP = 0,
339 PN533_PROTO_REQ_RESP
340 };
341
342 struct pn533 {
343 struct usb_device *udev;
344 struct usb_interface *interface;
345 struct nfc_dev *nfc_dev;
346 u32 device_type;
347 enum pn533_protocol_type protocol_type;
348
349 struct urb *out_urb;
350 struct urb *in_urb;
351
352 struct sk_buff_head resp_q;
353
354 struct workqueue_struct *wq;
355 struct work_struct cmd_work;
356 struct work_struct cmd_complete_work;
357 struct work_struct poll_work;
358 struct work_struct mi_work;
359 struct work_struct tg_work;
360
361 struct list_head cmd_queue;
362 struct pn533_cmd *cmd;
363 u8 cmd_pending;
364 struct mutex cmd_lock; /* protects cmd queue */
365
366 void *cmd_complete_mi_arg;
367
368 struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
369 u8 poll_mod_count;
370 u8 poll_mod_curr;
371 u32 poll_protocols;
372 u32 listen_protocols;
373 struct timer_list listen_timer;
374 int cancel_listen;
375
376 u8 *gb;
377 size_t gb_len;
378
379 u8 tgt_available_prots;
380 u8 tgt_active_prot;
381 u8 tgt_mode;
382
383 struct pn533_frame_ops *ops;
384 };
385
386 struct pn533_cmd {
387 struct list_head queue;
388 u8 code;
389 int status;
390 struct sk_buff *req;
391 struct sk_buff *resp;
392 int resp_len;
393 pn533_send_async_complete_t complete_cb;
394 void *complete_cb_context;
395 };
396
397 struct pn533_std_frame {
398 u8 preamble;
399 __be16 start_frame;
400 u8 datalen;
401 u8 datalen_checksum;
402 u8 data[];
403 } __packed;
404
405 struct pn533_frame_ops {
406 void (*tx_frame_init)(void *frame, u8 cmd_code);
407 void (*tx_frame_finish)(void *frame);
408 void (*tx_update_payload_len)(void *frame, int len);
409 int tx_header_len;
410 int tx_tail_len;
411
412 bool (*rx_is_frame_valid)(void *frame);
413 int (*rx_frame_size)(void *frame);
414 int rx_header_len;
415 int rx_tail_len;
416
417 int max_payload_len;
418 u8 (*get_cmd_code)(void *frame);
419 };
420
421 struct pn533_acr122_ccid_hdr {
422 u8 type;
423 u32 datalen;
424 u8 slot;
425 u8 seq;
426 u8 params[3]; /* 3 msg specific bytes or status, error and 1 specific
427 byte for reposnse msg */
428 u8 data[]; /* payload */
429 } __packed;
430
431 struct pn533_acr122_apdu_hdr {
432 u8 class;
433 u8 ins;
434 u8 p1;
435 u8 p2;
436 } __packed;
437
438 struct pn533_acr122_tx_frame {
439 struct pn533_acr122_ccid_hdr ccid;
440 struct pn533_acr122_apdu_hdr apdu;
441 u8 datalen;
442 u8 data[]; /* pn533 frame: TFI ... */
443 } __packed;
444
445 struct pn533_acr122_rx_frame {
446 struct pn533_acr122_ccid_hdr ccid;
447 u8 data[]; /* pn533 frame : TFI ... */
448 } __packed;
449
450 static void pn533_acr122_tx_frame_init(void *_frame, u8 cmd_code)
451 {
452 struct pn533_acr122_tx_frame *frame = _frame;
453
454 frame->ccid.type = PN533_ACR122_PC_TO_RDR_ESCAPE;
455 frame->ccid.datalen = sizeof(frame->apdu) + 1; /* sizeof(apdu_hdr) +
456 sizeof(datalen) */
457 frame->ccid.slot = 0;
458 frame->ccid.seq = 0;
459 frame->ccid.params[0] = 0;
460 frame->ccid.params[1] = 0;
461 frame->ccid.params[2] = 0;
462
463 frame->data[0] = PN533_STD_FRAME_DIR_OUT;
464 frame->data[1] = cmd_code;
465 frame->datalen = 2; /* data[0] + data[1] */
466
467 frame->apdu.class = 0xFF;
468 frame->apdu.ins = 0;
469 frame->apdu.p1 = 0;
470 frame->apdu.p2 = 0;
471 }
472
473 static void pn533_acr122_tx_frame_finish(void *_frame)
474 {
475 struct pn533_acr122_tx_frame *frame = _frame;
476
477 frame->ccid.datalen += frame->datalen;
478 }
479
480 static void pn533_acr122_tx_update_payload_len(void *_frame, int len)
481 {
482 struct pn533_acr122_tx_frame *frame = _frame;
483
484 frame->datalen += len;
485 }
486
487 static bool pn533_acr122_is_rx_frame_valid(void *_frame)
488 {
489 struct pn533_acr122_rx_frame *frame = _frame;
490
491 if (frame->ccid.type != 0x83)
492 return false;
493
494 if (frame->data[frame->ccid.datalen - 2] == 0x63)
495 return false;
496
497 return true;
498 }
499
500 static int pn533_acr122_rx_frame_size(void *frame)
501 {
502 struct pn533_acr122_rx_frame *f = frame;
503
504 /* f->ccid.datalen already includes tail length */
505 return sizeof(struct pn533_acr122_rx_frame) + f->ccid.datalen;
506 }
507
508 static u8 pn533_acr122_get_cmd_code(void *frame)
509 {
510 struct pn533_acr122_rx_frame *f = frame;
511
512 return PN533_STD_FRAME_CMD(f);
513 }
514
515 static struct pn533_frame_ops pn533_acr122_frame_ops = {
516 .tx_frame_init = pn533_acr122_tx_frame_init,
517 .tx_frame_finish = pn533_acr122_tx_frame_finish,
518 .tx_update_payload_len = pn533_acr122_tx_update_payload_len,
519 .tx_header_len = PN533_ACR122_TX_FRAME_HEADER_LEN,
520 .tx_tail_len = PN533_ACR122_TX_FRAME_TAIL_LEN,
521
522 .rx_is_frame_valid = pn533_acr122_is_rx_frame_valid,
523 .rx_header_len = PN533_ACR122_RX_FRAME_HEADER_LEN,
524 .rx_tail_len = PN533_ACR122_RX_FRAME_TAIL_LEN,
525 .rx_frame_size = pn533_acr122_rx_frame_size,
526
527 .max_payload_len = PN533_ACR122_FRAME_MAX_PAYLOAD_LEN,
528 .get_cmd_code = pn533_acr122_get_cmd_code,
529 };
530
531 /* The rule: value + checksum = 0 */
532 static inline u8 pn533_std_checksum(u8 value)
533 {
534 return ~value + 1;
535 }
536
537 /* The rule: sum(data elements) + checksum = 0 */
538 static u8 pn533_std_data_checksum(u8 *data, int datalen)
539 {
540 u8 sum = 0;
541 int i;
542
543 for (i = 0; i < datalen; i++)
544 sum += data[i];
545
546 return pn533_std_checksum(sum);
547 }
548
549 static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
550 {
551 struct pn533_std_frame *frame = _frame;
552
553 frame->preamble = 0;
554 frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
555 PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
556 PN533_STD_FRAME_CMD(frame) = cmd_code;
557 frame->datalen = 2;
558 }
559
560 static void pn533_std_tx_frame_finish(void *_frame)
561 {
562 struct pn533_std_frame *frame = _frame;
563
564 frame->datalen_checksum = pn533_std_checksum(frame->datalen);
565
566 PN533_STD_FRAME_CHECKSUM(frame) =
567 pn533_std_data_checksum(frame->data, frame->datalen);
568
569 PN533_STD_FRAME_POSTAMBLE(frame) = 0;
570 }
571
572 static void pn533_std_tx_update_payload_len(void *_frame, int len)
573 {
574 struct pn533_std_frame *frame = _frame;
575
576 frame->datalen += len;
577 }
578
579 static bool pn533_std_rx_frame_is_valid(void *_frame)
580 {
581 u8 checksum;
582 struct pn533_std_frame *frame = _frame;
583
584 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
585 return false;
586
587 checksum = pn533_std_checksum(frame->datalen);
588 if (checksum != frame->datalen_checksum)
589 return false;
590
591 checksum = pn533_std_data_checksum(frame->data, frame->datalen);
592 if (checksum != PN533_STD_FRAME_CHECKSUM(frame))
593 return false;
594
595 return true;
596 }
597
598 static bool pn533_std_rx_frame_is_ack(struct pn533_std_frame *frame)
599 {
600 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
601 return false;
602
603 if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
604 return false;
605
606 return true;
607 }
608
609 static inline int pn533_std_rx_frame_size(void *frame)
610 {
611 struct pn533_std_frame *f = frame;
612
613 return sizeof(struct pn533_std_frame) + f->datalen +
614 PN533_STD_FRAME_TAIL_LEN;
615 }
616
617 static u8 pn533_std_get_cmd_code(void *frame)
618 {
619 struct pn533_std_frame *f = frame;
620
621 return PN533_STD_FRAME_CMD(f);
622 }
623
624 static struct pn533_frame_ops pn533_std_frame_ops = {
625 .tx_frame_init = pn533_std_tx_frame_init,
626 .tx_frame_finish = pn533_std_tx_frame_finish,
627 .tx_update_payload_len = pn533_std_tx_update_payload_len,
628 .tx_header_len = PN533_STD_FRAME_HEADER_LEN,
629 .tx_tail_len = PN533_STD_FRAME_TAIL_LEN,
630
631 .rx_is_frame_valid = pn533_std_rx_frame_is_valid,
632 .rx_frame_size = pn533_std_rx_frame_size,
633 .rx_header_len = PN533_STD_FRAME_HEADER_LEN,
634 .rx_tail_len = PN533_STD_FRAME_TAIL_LEN,
635
636 .max_payload_len = PN533_STD_FRAME_MAX_PAYLOAD_LEN,
637 .get_cmd_code = pn533_std_get_cmd_code,
638 };
639
640 static bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
641 {
642 return (dev->ops->get_cmd_code(frame) ==
643 PN533_CMD_RESPONSE(dev->cmd->code));
644 }
645
646 static void pn533_recv_response(struct urb *urb)
647 {
648 struct pn533 *dev = urb->context;
649 struct pn533_cmd *cmd = dev->cmd;
650 u8 *in_frame;
651
652 cmd->status = urb->status;
653
654 switch (urb->status) {
655 case 0:
656 break; /* success */
657 case -ECONNRESET:
658 case -ENOENT:
659 nfc_dev_dbg(&dev->interface->dev,
660 "The urb has been canceled (status %d)",
661 urb->status);
662 goto sched_wq;
663 case -ESHUTDOWN:
664 default:
665 nfc_dev_err(&dev->interface->dev,
666 "Urb failure (status %d)", urb->status);
667 goto sched_wq;
668 }
669
670 in_frame = dev->in_urb->transfer_buffer;
671
672 nfc_dev_dbg(&dev->interface->dev, "Received a frame.");
673 print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
674 dev->ops->rx_frame_size(in_frame), false);
675
676 if (!dev->ops->rx_is_frame_valid(in_frame)) {
677 nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
678 cmd->status = -EIO;
679 goto sched_wq;
680 }
681
682 if (!pn533_rx_frame_is_cmd_response(dev, in_frame)) {
683 nfc_dev_err(&dev->interface->dev,
684 "It it not the response to the last command");
685 cmd->status = -EIO;
686 goto sched_wq;
687 }
688
689 sched_wq:
690 queue_work(dev->wq, &dev->cmd_complete_work);
691 }
692
693 static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
694 {
695 dev->in_urb->complete = pn533_recv_response;
696
697 return usb_submit_urb(dev->in_urb, flags);
698 }
699
700 static void pn533_recv_ack(struct urb *urb)
701 {
702 struct pn533 *dev = urb->context;
703 struct pn533_cmd *cmd = dev->cmd;
704 struct pn533_std_frame *in_frame;
705 int rc;
706
707 cmd->status = urb->status;
708
709 switch (urb->status) {
710 case 0:
711 break; /* success */
712 case -ECONNRESET:
713 case -ENOENT:
714 nfc_dev_dbg(&dev->interface->dev,
715 "The urb has been stopped (status %d)",
716 urb->status);
717 goto sched_wq;
718 case -ESHUTDOWN:
719 default:
720 nfc_dev_err(&dev->interface->dev,
721 "Urb failure (status %d)", urb->status);
722 goto sched_wq;
723 }
724
725 in_frame = dev->in_urb->transfer_buffer;
726
727 if (!pn533_std_rx_frame_is_ack(in_frame)) {
728 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
729 cmd->status = -EIO;
730 goto sched_wq;
731 }
732
733 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
734 if (rc) {
735 nfc_dev_err(&dev->interface->dev,
736 "usb_submit_urb failed with result %d", rc);
737 cmd->status = rc;
738 goto sched_wq;
739 }
740
741 return;
742
743 sched_wq:
744 queue_work(dev->wq, &dev->cmd_complete_work);
745 }
746
747 static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
748 {
749 dev->in_urb->complete = pn533_recv_ack;
750
751 return usb_submit_urb(dev->in_urb, flags);
752 }
753
754 static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
755 {
756 u8 ack[PN533_STD_FRAME_ACK_SIZE] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
757 /* spec 7.1.1.3: Preamble, SoPC (2), ACK Code (2), Postamble */
758 int rc;
759
760 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
761
762 dev->out_urb->transfer_buffer = ack;
763 dev->out_urb->transfer_buffer_length = sizeof(ack);
764 rc = usb_submit_urb(dev->out_urb, flags);
765
766 return rc;
767 }
768
769 static int __pn533_send_frame_async(struct pn533 *dev,
770 struct sk_buff *out,
771 struct sk_buff *in,
772 int in_len)
773 {
774 int rc;
775
776 dev->out_urb->transfer_buffer = out->data;
777 dev->out_urb->transfer_buffer_length = out->len;
778
779 dev->in_urb->transfer_buffer = in->data;
780 dev->in_urb->transfer_buffer_length = in_len;
781
782 print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
783 out->data, out->len, false);
784
785 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
786 if (rc)
787 return rc;
788
789 if (dev->protocol_type == PN533_PROTO_REQ_RESP) {
790 /* request for response for sent packet directly */
791 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
792 if (rc)
793 goto error;
794 } else if (dev->protocol_type == PN533_PROTO_REQ_ACK_RESP) {
795 /* request for ACK if that's the case */
796 rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
797 if (rc)
798 goto error;
799 }
800
801 return 0;
802
803 error:
804 usb_unlink_urb(dev->out_urb);
805 return rc;
806 }
807
808 static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
809 struct sk_buff *skb)
810 {
811 /* payload is already there, just update datalen */
812 int payload_len = skb->len;
813 struct pn533_frame_ops *ops = dev->ops;
814
815
816 skb_push(skb, ops->tx_header_len);
817 skb_put(skb, ops->tx_tail_len);
818
819 ops->tx_frame_init(skb->data, cmd_code);
820 ops->tx_update_payload_len(skb->data, payload_len);
821 ops->tx_frame_finish(skb->data);
822 }
823
824 static int pn533_send_async_complete(struct pn533 *dev)
825 {
826 struct pn533_cmd *cmd = dev->cmd;
827 int status = cmd->status;
828
829 struct sk_buff *req = cmd->req;
830 struct sk_buff *resp = cmd->resp;
831
832 int rc;
833
834 dev_kfree_skb(req);
835
836 if (status < 0) {
837 rc = cmd->complete_cb(dev, cmd->complete_cb_context,
838 ERR_PTR(status));
839 dev_kfree_skb(resp);
840 goto done;
841 }
842
843 skb_put(resp, dev->ops->rx_frame_size(resp->data));
844 skb_pull(resp, dev->ops->rx_header_len);
845 skb_trim(resp, resp->len - dev->ops->rx_tail_len);
846
847 rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
848
849 done:
850 kfree(cmd);
851 dev->cmd = NULL;
852 return rc;
853 }
854
855 static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
856 struct sk_buff *req, struct sk_buff *resp,
857 int resp_len,
858 pn533_send_async_complete_t complete_cb,
859 void *complete_cb_context)
860 {
861 struct pn533_cmd *cmd;
862 int rc = 0;
863
864 nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x", cmd_code);
865
866 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
867 if (!cmd)
868 return -ENOMEM;
869
870 cmd->code = cmd_code;
871 cmd->req = req;
872 cmd->resp = resp;
873 cmd->resp_len = resp_len;
874 cmd->complete_cb = complete_cb;
875 cmd->complete_cb_context = complete_cb_context;
876
877 pn533_build_cmd_frame(dev, cmd_code, req);
878
879 mutex_lock(&dev->cmd_lock);
880
881 if (!dev->cmd_pending) {
882 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
883 if (rc)
884 goto error;
885
886 dev->cmd_pending = 1;
887 dev->cmd = cmd;
888 goto unlock;
889 }
890
891 nfc_dev_dbg(&dev->interface->dev, "%s Queueing command 0x%x", __func__,
892 cmd_code);
893
894 INIT_LIST_HEAD(&cmd->queue);
895 list_add_tail(&cmd->queue, &dev->cmd_queue);
896
897 goto unlock;
898
899 error:
900 kfree(cmd);
901 unlock:
902 mutex_unlock(&dev->cmd_lock);
903 return rc;
904 }
905
906 static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
907 struct sk_buff *req,
908 pn533_send_async_complete_t complete_cb,
909 void *complete_cb_context)
910 {
911 struct sk_buff *resp;
912 int rc;
913 int resp_len = dev->ops->rx_header_len +
914 dev->ops->max_payload_len +
915 dev->ops->rx_tail_len;
916
917 resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);
918 if (!resp)
919 return -ENOMEM;
920
921 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
922 complete_cb_context);
923 if (rc)
924 dev_kfree_skb(resp);
925
926 return rc;
927 }
928
929 static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
930 struct sk_buff *req,
931 pn533_send_async_complete_t complete_cb,
932 void *complete_cb_context)
933 {
934 struct sk_buff *resp;
935 int rc;
936 int resp_len = dev->ops->rx_header_len +
937 dev->ops->max_payload_len +
938 dev->ops->rx_tail_len;
939
940 resp = alloc_skb(resp_len, GFP_KERNEL);
941 if (!resp)
942 return -ENOMEM;
943
944 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
945 complete_cb_context);
946 if (rc)
947 dev_kfree_skb(resp);
948
949 return rc;
950 }
951
952 /*
953 * pn533_send_cmd_direct_async
954 *
955 * The function sends a piority cmd directly to the chip omiting the cmd
956 * queue. It's intended to be used by chaining mechanism of received responses
957 * where the host has to request every single chunk of data before scheduling
958 * next cmd from the queue.
959 */
960 static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
961 struct sk_buff *req,
962 pn533_send_async_complete_t complete_cb,
963 void *complete_cb_context)
964 {
965 struct sk_buff *resp;
966 struct pn533_cmd *cmd;
967 int rc;
968 int resp_len = dev->ops->rx_header_len +
969 dev->ops->max_payload_len +
970 dev->ops->rx_tail_len;
971
972 resp = alloc_skb(resp_len, GFP_KERNEL);
973 if (!resp)
974 return -ENOMEM;
975
976 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
977 if (!cmd) {
978 dev_kfree_skb(resp);
979 return -ENOMEM;
980 }
981
982 cmd->code = cmd_code;
983 cmd->req = req;
984 cmd->resp = resp;
985 cmd->resp_len = resp_len;
986 cmd->complete_cb = complete_cb;
987 cmd->complete_cb_context = complete_cb_context;
988
989 pn533_build_cmd_frame(dev, cmd_code, req);
990
991 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
992 if (rc < 0) {
993 dev_kfree_skb(resp);
994 kfree(cmd);
995 } else {
996 dev->cmd = cmd;
997 }
998
999 return rc;
1000 }
1001
1002 static void pn533_wq_cmd_complete(struct work_struct *work)
1003 {
1004 struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
1005 int rc;
1006
1007 rc = pn533_send_async_complete(dev);
1008 if (rc != -EINPROGRESS)
1009 queue_work(dev->wq, &dev->cmd_work);
1010 }
1011
1012 static void pn533_wq_cmd(struct work_struct *work)
1013 {
1014 struct pn533 *dev = container_of(work, struct pn533, cmd_work);
1015 struct pn533_cmd *cmd;
1016 int rc;
1017
1018 mutex_lock(&dev->cmd_lock);
1019
1020 if (list_empty(&dev->cmd_queue)) {
1021 dev->cmd_pending = 0;
1022 mutex_unlock(&dev->cmd_lock);
1023 return;
1024 }
1025
1026 cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
1027
1028 list_del(&cmd->queue);
1029
1030 mutex_unlock(&dev->cmd_lock);
1031
1032 rc = __pn533_send_frame_async(dev, cmd->req, cmd->resp, cmd->resp_len);
1033 if (rc < 0) {
1034 dev_kfree_skb(cmd->req);
1035 dev_kfree_skb(cmd->resp);
1036 kfree(cmd);
1037 return;
1038 }
1039
1040 dev->cmd = cmd;
1041 }
1042
1043 struct pn533_sync_cmd_response {
1044 struct sk_buff *resp;
1045 struct completion done;
1046 };
1047
1048 static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
1049 struct sk_buff *resp)
1050 {
1051 struct pn533_sync_cmd_response *arg = _arg;
1052
1053 arg->resp = resp;
1054 complete(&arg->done);
1055
1056 return 0;
1057 }
1058
1059 /* pn533_send_cmd_sync
1060 *
1061 * Please note the req parameter is freed inside the function to
1062 * limit a number of return value interpretations by the caller.
1063 *
1064 * 1. negative in case of error during TX path -> req should be freed
1065 *
1066 * 2. negative in case of error during RX path -> req should not be freed
1067 * as it's been already freed at the begining of RX path by
1068 * async_complete_cb.
1069 *
1070 * 3. valid pointer in case of succesfult RX path
1071 *
1072 * A caller has to check a return value with IS_ERR macro. If the test pass,
1073 * the returned pointer is valid.
1074 *
1075 * */
1076 static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
1077 struct sk_buff *req)
1078 {
1079 int rc;
1080 struct pn533_sync_cmd_response arg;
1081
1082 init_completion(&arg.done);
1083
1084 rc = pn533_send_cmd_async(dev, cmd_code, req,
1085 pn533_send_sync_complete, &arg);
1086 if (rc) {
1087 dev_kfree_skb(req);
1088 return ERR_PTR(rc);
1089 }
1090
1091 wait_for_completion(&arg.done);
1092
1093 return arg.resp;
1094 }
1095
1096 static void pn533_send_complete(struct urb *urb)
1097 {
1098 struct pn533 *dev = urb->context;
1099
1100 switch (urb->status) {
1101 case 0:
1102 break; /* success */
1103 case -ECONNRESET:
1104 case -ENOENT:
1105 nfc_dev_dbg(&dev->interface->dev,
1106 "The urb has been stopped (status %d)",
1107 urb->status);
1108 break;
1109 case -ESHUTDOWN:
1110 default:
1111 nfc_dev_err(&dev->interface->dev,
1112 "Urb failure (status %d)", urb->status);
1113 }
1114 }
1115
1116 static void pn533_abort_cmd(struct pn533 *dev, gfp_t flags)
1117 {
1118 /* ACR122U does not support any command which aborts last
1119 * issued command i.e. as ACK for standard PN533. Additionally,
1120 * it behaves stange, sending broken or incorrect responses,
1121 * when we cancel urb before the chip will send response.
1122 */
1123 if (dev->device_type == PN533_DEVICE_ACR122U)
1124 return;
1125
1126 /* An ack will cancel the last issued command */
1127 pn533_send_ack(dev, flags);
1128
1129 /* cancel the urb request */
1130 usb_kill_urb(dev->in_urb);
1131 }
1132
1133 static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
1134 {
1135 struct sk_buff *skb;
1136
1137 skb = alloc_skb(dev->ops->tx_header_len +
1138 size +
1139 dev->ops->tx_tail_len, GFP_KERNEL);
1140
1141 if (skb)
1142 skb_reserve(skb, dev->ops->tx_header_len);
1143
1144 return skb;
1145 }
1146
1147 struct pn533_target_type_a {
1148 __be16 sens_res;
1149 u8 sel_res;
1150 u8 nfcid_len;
1151 u8 nfcid_data[];
1152 } __packed;
1153
1154
1155 #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
1156 #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
1157 #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
1158
1159 #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
1160 #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
1161
1162 #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
1163 #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
1164
1165 #define PN533_TYPE_A_SEL_PROT_MIFARE 0
1166 #define PN533_TYPE_A_SEL_PROT_ISO14443 1
1167 #define PN533_TYPE_A_SEL_PROT_DEP 2
1168 #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
1169
1170 static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
1171 int target_data_len)
1172 {
1173 u8 ssd;
1174 u8 platconf;
1175
1176 if (target_data_len < sizeof(struct pn533_target_type_a))
1177 return false;
1178
1179 /* The lenght check of nfcid[] and ats[] are not being performed because
1180 the values are not being used */
1181
1182 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1183 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
1184 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
1185
1186 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1187 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1188 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1189 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1190 return false;
1191
1192 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
1193 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
1194 return false;
1195
1196 return true;
1197 }
1198
1199 static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
1200 int tgt_data_len)
1201 {
1202 struct pn533_target_type_a *tgt_type_a;
1203
1204 tgt_type_a = (struct pn533_target_type_a *)tgt_data;
1205
1206 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
1207 return -EPROTO;
1208
1209 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
1210 case PN533_TYPE_A_SEL_PROT_MIFARE:
1211 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
1212 break;
1213 case PN533_TYPE_A_SEL_PROT_ISO14443:
1214 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
1215 break;
1216 case PN533_TYPE_A_SEL_PROT_DEP:
1217 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1218 break;
1219 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
1220 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
1221 NFC_PROTO_NFC_DEP_MASK;
1222 break;
1223 }
1224
1225 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
1226 nfc_tgt->sel_res = tgt_type_a->sel_res;
1227 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
1228 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
1229
1230 return 0;
1231 }
1232
1233 struct pn533_target_felica {
1234 u8 pol_res;
1235 u8 opcode;
1236 u8 nfcid2[8];
1237 u8 pad[8];
1238 /* optional */
1239 u8 syst_code[];
1240 } __packed;
1241
1242 #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
1243 #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
1244
1245 static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
1246 int target_data_len)
1247 {
1248 if (target_data_len < sizeof(struct pn533_target_felica))
1249 return false;
1250
1251 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
1252 return false;
1253
1254 return true;
1255 }
1256
1257 static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
1258 int tgt_data_len)
1259 {
1260 struct pn533_target_felica *tgt_felica;
1261
1262 tgt_felica = (struct pn533_target_felica *)tgt_data;
1263
1264 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
1265 return -EPROTO;
1266
1267 if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
1268 (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
1269 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1270 else
1271 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
1272
1273 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
1274 nfc_tgt->sensf_res_len = 9;
1275
1276 return 0;
1277 }
1278
1279 struct pn533_target_jewel {
1280 __be16 sens_res;
1281 u8 jewelid[4];
1282 } __packed;
1283
1284 static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
1285 int target_data_len)
1286 {
1287 u8 ssd;
1288 u8 platconf;
1289
1290 if (target_data_len < sizeof(struct pn533_target_jewel))
1291 return false;
1292
1293 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1294 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
1295 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
1296
1297 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1298 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1299 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1300 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1301 return false;
1302
1303 return true;
1304 }
1305
1306 static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
1307 int tgt_data_len)
1308 {
1309 struct pn533_target_jewel *tgt_jewel;
1310
1311 tgt_jewel = (struct pn533_target_jewel *)tgt_data;
1312
1313 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
1314 return -EPROTO;
1315
1316 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
1317 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
1318 nfc_tgt->nfcid1_len = 4;
1319 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
1320
1321 return 0;
1322 }
1323
1324 struct pn533_type_b_prot_info {
1325 u8 bitrate;
1326 u8 fsci_type;
1327 u8 fwi_adc_fo;
1328 } __packed;
1329
1330 #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1331 #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1332 #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1333
1334 struct pn533_type_b_sens_res {
1335 u8 opcode;
1336 u8 nfcid[4];
1337 u8 appdata[4];
1338 struct pn533_type_b_prot_info prot_info;
1339 } __packed;
1340
1341 #define PN533_TYPE_B_OPC_SENSB_RES 0x50
1342
1343 struct pn533_target_type_b {
1344 struct pn533_type_b_sens_res sensb_res;
1345 u8 attrib_res_len;
1346 u8 attrib_res[];
1347 } __packed;
1348
1349 static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1350 int target_data_len)
1351 {
1352 if (target_data_len < sizeof(struct pn533_target_type_b))
1353 return false;
1354
1355 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1356 return false;
1357
1358 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1359 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1360 return false;
1361
1362 return true;
1363 }
1364
1365 static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1366 int tgt_data_len)
1367 {
1368 struct pn533_target_type_b *tgt_type_b;
1369
1370 tgt_type_b = (struct pn533_target_type_b *)tgt_data;
1371
1372 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1373 return -EPROTO;
1374
1375 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
1376
1377 return 0;
1378 }
1379
1380 static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
1381 int tgdata_len)
1382 {
1383 struct nfc_target nfc_tgt;
1384 int rc;
1385
1386 nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
1387 dev->poll_mod_curr);
1388
1389 if (tg != 1)
1390 return -EPROTO;
1391
1392 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1393
1394 switch (dev->poll_mod_curr) {
1395 case PN533_POLL_MOD_106KBPS_A:
1396 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
1397 break;
1398 case PN533_POLL_MOD_212KBPS_FELICA:
1399 case PN533_POLL_MOD_424KBPS_FELICA:
1400 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
1401 break;
1402 case PN533_POLL_MOD_106KBPS_JEWEL:
1403 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
1404 break;
1405 case PN533_POLL_MOD_847KBPS_B:
1406 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
1407 break;
1408 default:
1409 nfc_dev_err(&dev->interface->dev,
1410 "Unknown current poll modulation");
1411 return -EPROTO;
1412 }
1413
1414 if (rc)
1415 return rc;
1416
1417 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
1418 nfc_dev_dbg(&dev->interface->dev,
1419 "The Tg found doesn't have the desired protocol");
1420 return -EAGAIN;
1421 }
1422
1423 nfc_dev_dbg(&dev->interface->dev,
1424 "Target found - supported protocols: 0x%x",
1425 nfc_tgt.supported_protocols);
1426
1427 dev->tgt_available_prots = nfc_tgt.supported_protocols;
1428
1429 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1430
1431 return 0;
1432 }
1433
1434 static inline void pn533_poll_next_mod(struct pn533 *dev)
1435 {
1436 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1437 }
1438
1439 static void pn533_poll_reset_mod_list(struct pn533 *dev)
1440 {
1441 dev->poll_mod_count = 0;
1442 }
1443
1444 static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1445 {
1446 dev->poll_mod_active[dev->poll_mod_count] =
1447 (struct pn533_poll_modulations *)&poll_mod[mod_index];
1448 dev->poll_mod_count++;
1449 }
1450
1451 static void pn533_poll_create_mod_list(struct pn533 *dev,
1452 u32 im_protocols, u32 tm_protocols)
1453 {
1454 pn533_poll_reset_mod_list(dev);
1455
1456 if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
1457 (im_protocols & NFC_PROTO_ISO14443_MASK) ||
1458 (im_protocols & NFC_PROTO_NFC_DEP_MASK))
1459 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1460
1461 if (im_protocols & NFC_PROTO_FELICA_MASK ||
1462 im_protocols & NFC_PROTO_NFC_DEP_MASK) {
1463 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1464 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1465 }
1466
1467 if (im_protocols & NFC_PROTO_JEWEL_MASK)
1468 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1469
1470 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
1471 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
1472
1473 if (tm_protocols)
1474 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
1475 }
1476
1477 static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
1478 {
1479 u8 nbtg, tg, *tgdata;
1480 int rc, tgdata_len;
1481
1482 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1483
1484 nbtg = resp->data[0];
1485 tg = resp->data[1];
1486 tgdata = &resp->data[2];
1487 tgdata_len = resp->len - 2; /* nbtg + tg */
1488
1489 if (nbtg) {
1490 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
1491
1492 /* We must stop the poll after a valid target found */
1493 if (rc == 0) {
1494 pn533_poll_reset_mod_list(dev);
1495 return 0;
1496 }
1497 }
1498
1499 return -EAGAIN;
1500 }
1501
1502 static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
1503 {
1504 struct sk_buff *skb;
1505 u8 *felica, *nfcid3, *gb;
1506
1507 u8 *gbytes = dev->gb;
1508 size_t gbytes_len = dev->gb_len;
1509
1510 u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1511 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1512 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1513 0xff, 0xff}; /* System code */
1514
1515 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1516 0x0, 0x0, 0x0,
1517 0x40}; /* SEL_RES for DEP */
1518
1519 unsigned int skb_len = 36 + /* mode (1), mifare (6),
1520 felica (18), nfcid3 (10), gb_len (1) */
1521 gbytes_len +
1522 1; /* len Tk*/
1523
1524 skb = pn533_alloc_skb(dev, skb_len);
1525 if (!skb)
1526 return NULL;
1527
1528 /* DEP support only */
1529 *skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
1530
1531 /* MIFARE params */
1532 memcpy(skb_put(skb, 6), mifare_params, 6);
1533
1534 /* Felica params */
1535 felica = skb_put(skb, 18);
1536 memcpy(felica, felica_params, 18);
1537 get_random_bytes(felica + 2, 6);
1538
1539 /* NFCID3 */
1540 nfcid3 = skb_put(skb, 10);
1541 memset(nfcid3, 0, 10);
1542 memcpy(nfcid3, felica, 8);
1543
1544 /* General bytes */
1545 *skb_put(skb, 1) = gbytes_len;
1546
1547 gb = skb_put(skb, gbytes_len);
1548 memcpy(gb, gbytes, gbytes_len);
1549
1550 /* Len Tk */
1551 *skb_put(skb, 1) = 0;
1552
1553 return skb;
1554 }
1555
1556 #define PN533_CMD_DATAEXCH_HEAD_LEN 1
1557 #define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1558 static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
1559 struct sk_buff *resp)
1560 {
1561 u8 status;
1562
1563 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1564
1565 if (IS_ERR(resp))
1566 return PTR_ERR(resp);
1567
1568 status = resp->data[0];
1569 skb_pull(resp, sizeof(status));
1570
1571 if (status != 0) {
1572 nfc_tm_deactivated(dev->nfc_dev);
1573 dev->tgt_mode = 0;
1574 dev_kfree_skb(resp);
1575 return 0;
1576 }
1577
1578 return nfc_tm_data_received(dev->nfc_dev, resp);
1579 }
1580
1581 static void pn533_wq_tg_get_data(struct work_struct *work)
1582 {
1583 struct pn533 *dev = container_of(work, struct pn533, tg_work);
1584
1585 struct sk_buff *skb;
1586 int rc;
1587
1588 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1589
1590 skb = pn533_alloc_skb(dev, 0);
1591 if (!skb)
1592 return;
1593
1594 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1595 pn533_tm_get_data_complete, NULL);
1596
1597 if (rc < 0)
1598 dev_kfree_skb(skb);
1599
1600 return;
1601 }
1602
1603 #define ATR_REQ_GB_OFFSET 17
1604 static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
1605 {
1606 u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
1607 size_t gb_len;
1608 int rc;
1609
1610 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1611
1612 if (resp->len < ATR_REQ_GB_OFFSET + 1)
1613 return -EINVAL;
1614
1615 mode = resp->data[0];
1616 cmd = &resp->data[1];
1617
1618 nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n",
1619 mode, resp->len);
1620
1621 if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1622 PN533_INIT_TARGET_RESP_ACTIVE)
1623 comm_mode = NFC_COMM_ACTIVE;
1624
1625 if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */
1626 return -EOPNOTSUPP;
1627
1628 gb = cmd + ATR_REQ_GB_OFFSET;
1629 gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
1630
1631 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1632 comm_mode, gb, gb_len);
1633 if (rc < 0) {
1634 nfc_dev_err(&dev->interface->dev,
1635 "Error when signaling target activation");
1636 return rc;
1637 }
1638
1639 dev->tgt_mode = 1;
1640 queue_work(dev->wq, &dev->tg_work);
1641
1642 return 0;
1643 }
1644
1645 static void pn533_listen_mode_timer(unsigned long data)
1646 {
1647 struct pn533 *dev = (struct pn533 *)data;
1648
1649 nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
1650
1651 dev->cancel_listen = 1;
1652
1653 pn533_poll_next_mod(dev);
1654
1655 queue_work(dev->wq, &dev->poll_work);
1656 }
1657
1658 static int pn533_poll_complete(struct pn533 *dev, void *arg,
1659 struct sk_buff *resp)
1660 {
1661 struct pn533_poll_modulations *cur_mod;
1662 int rc;
1663
1664 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1665
1666 if (IS_ERR(resp)) {
1667 rc = PTR_ERR(resp);
1668
1669 nfc_dev_err(&dev->interface->dev, "%s Poll complete error %d",
1670 __func__, rc);
1671
1672 if (rc == -ENOENT) {
1673 if (dev->poll_mod_count != 0)
1674 return rc;
1675 else
1676 goto stop_poll;
1677 } else if (rc < 0) {
1678 nfc_dev_err(&dev->interface->dev,
1679 "Error %d when running poll", rc);
1680 goto stop_poll;
1681 }
1682 }
1683
1684 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1685
1686 if (cur_mod->len == 0) { /* Target mode */
1687 del_timer(&dev->listen_timer);
1688 rc = pn533_init_target_complete(dev, resp);
1689 goto done;
1690 }
1691
1692 /* Initiator mode */
1693 rc = pn533_start_poll_complete(dev, resp);
1694 if (!rc)
1695 goto done;
1696
1697 if (!dev->poll_mod_count) {
1698 nfc_dev_dbg(&dev->interface->dev, "Polling has been stoped.");
1699 goto done;
1700 }
1701
1702 pn533_poll_next_mod(dev);
1703 queue_work(dev->wq, &dev->poll_work);
1704
1705 done:
1706 dev_kfree_skb(resp);
1707 return rc;
1708
1709 stop_poll:
1710 nfc_dev_err(&dev->interface->dev, "Polling operation has been stopped");
1711
1712 pn533_poll_reset_mod_list(dev);
1713 dev->poll_protocols = 0;
1714 return rc;
1715 }
1716
1717 static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1718 struct pn533_poll_modulations *mod)
1719 {
1720 struct sk_buff *skb;
1721
1722 skb = pn533_alloc_skb(dev, mod->len);
1723 if (!skb)
1724 return NULL;
1725
1726 memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
1727
1728 return skb;
1729 }
1730
1731 static int pn533_send_poll_frame(struct pn533 *dev)
1732 {
1733 struct pn533_poll_modulations *mod;
1734 struct sk_buff *skb;
1735 int rc;
1736 u8 cmd_code;
1737
1738 mod = dev->poll_mod_active[dev->poll_mod_curr];
1739
1740 nfc_dev_dbg(&dev->interface->dev, "%s mod len %d\n",
1741 __func__, mod->len);
1742
1743 if (mod->len == 0) { /* Listen mode */
1744 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
1745 skb = pn533_alloc_poll_tg_frame(dev);
1746 } else { /* Polling mode */
1747 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
1748 skb = pn533_alloc_poll_in_frame(dev, mod);
1749 }
1750
1751 if (!skb) {
1752 nfc_dev_err(&dev->interface->dev, "Failed to allocate skb.");
1753 return -ENOMEM;
1754 }
1755
1756 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1757 NULL);
1758 if (rc < 0) {
1759 dev_kfree_skb(skb);
1760 nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
1761 }
1762
1763 return rc;
1764 }
1765
1766 static void pn533_wq_poll(struct work_struct *work)
1767 {
1768 struct pn533 *dev = container_of(work, struct pn533, poll_work);
1769 struct pn533_poll_modulations *cur_mod;
1770 int rc;
1771
1772 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1773
1774 nfc_dev_dbg(&dev->interface->dev,
1775 "%s cancel_listen %d modulation len %d",
1776 __func__, dev->cancel_listen, cur_mod->len);
1777
1778 if (dev->cancel_listen == 1) {
1779 dev->cancel_listen = 0;
1780 pn533_abort_cmd(dev, GFP_ATOMIC);
1781 }
1782
1783 rc = pn533_send_poll_frame(dev);
1784 if (rc)
1785 return;
1786
1787 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1788 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1789
1790 return;
1791 }
1792
1793 static int pn533_start_poll(struct nfc_dev *nfc_dev,
1794 u32 im_protocols, u32 tm_protocols)
1795 {
1796 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1797
1798 nfc_dev_dbg(&dev->interface->dev,
1799 "%s: im protocols 0x%x tm protocols 0x%x",
1800 __func__, im_protocols, tm_protocols);
1801
1802 if (dev->tgt_active_prot) {
1803 nfc_dev_err(&dev->interface->dev,
1804 "Cannot poll with a target already activated");
1805 return -EBUSY;
1806 }
1807
1808 if (dev->tgt_mode) {
1809 nfc_dev_err(&dev->interface->dev,
1810 "Cannot poll while already being activated");
1811 return -EBUSY;
1812 }
1813
1814 if (tm_protocols) {
1815 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1816 if (dev->gb == NULL)
1817 tm_protocols = 0;
1818 }
1819
1820 dev->poll_mod_curr = 0;
1821 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1822 dev->poll_protocols = im_protocols;
1823 dev->listen_protocols = tm_protocols;
1824
1825 return pn533_send_poll_frame(dev);
1826 }
1827
1828 static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1829 {
1830 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1831
1832 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1833
1834 del_timer(&dev->listen_timer);
1835
1836 if (!dev->poll_mod_count) {
1837 nfc_dev_dbg(&dev->interface->dev,
1838 "Polling operation was not running");
1839 return;
1840 }
1841
1842 pn533_abort_cmd(dev, GFP_KERNEL);
1843 pn533_poll_reset_mod_list(dev);
1844 }
1845
1846 static int pn533_activate_target_nfcdep(struct pn533 *dev)
1847 {
1848 struct pn533_cmd_activate_response *rsp;
1849 u16 gt_len;
1850 int rc;
1851
1852 struct sk_buff *skb;
1853 struct sk_buff *resp;
1854
1855 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1856
1857 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
1858 if (!skb)
1859 return -ENOMEM;
1860
1861 *skb_put(skb, sizeof(u8)) = 1; /* TG */
1862 *skb_put(skb, sizeof(u8)) = 0; /* Next */
1863
1864 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1865 if (IS_ERR(resp))
1866 return PTR_ERR(resp);
1867
1868 rsp = (struct pn533_cmd_activate_response *)resp->data;
1869 rc = rsp->status & PN533_CMD_RET_MASK;
1870 if (rc != PN533_CMD_RET_SUCCESS) {
1871 nfc_dev_err(&dev->interface->dev,
1872 "Target activation failed (error 0x%x)", rc);
1873 dev_kfree_skb(resp);
1874 return -EIO;
1875 }
1876
1877 /* ATR_RES general bytes are located at offset 16 */
1878 gt_len = resp->len - 16;
1879 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
1880
1881 dev_kfree_skb(resp);
1882 return rc;
1883 }
1884
1885 static int pn533_activate_target(struct nfc_dev *nfc_dev,
1886 struct nfc_target *target, u32 protocol)
1887 {
1888 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1889 int rc;
1890
1891 nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
1892 protocol);
1893
1894 if (dev->poll_mod_count) {
1895 nfc_dev_err(&dev->interface->dev,
1896 "Cannot activate while polling");
1897 return -EBUSY;
1898 }
1899
1900 if (dev->tgt_active_prot) {
1901 nfc_dev_err(&dev->interface->dev,
1902 "There is already an active target");
1903 return -EBUSY;
1904 }
1905
1906 if (!dev->tgt_available_prots) {
1907 nfc_dev_err(&dev->interface->dev,
1908 "There is no available target to activate");
1909 return -EINVAL;
1910 }
1911
1912 if (!(dev->tgt_available_prots & (1 << protocol))) {
1913 nfc_dev_err(&dev->interface->dev,
1914 "Target doesn't support requested proto %u",
1915 protocol);
1916 return -EINVAL;
1917 }
1918
1919 if (protocol == NFC_PROTO_NFC_DEP) {
1920 rc = pn533_activate_target_nfcdep(dev);
1921 if (rc) {
1922 nfc_dev_err(&dev->interface->dev,
1923 "Activating target with DEP failed %d", rc);
1924 return rc;
1925 }
1926 }
1927
1928 dev->tgt_active_prot = protocol;
1929 dev->tgt_available_prots = 0;
1930
1931 return 0;
1932 }
1933
1934 static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1935 struct nfc_target *target)
1936 {
1937 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1938
1939 struct sk_buff *skb;
1940 struct sk_buff *resp;
1941
1942 int rc;
1943
1944 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1945
1946 if (!dev->tgt_active_prot) {
1947 nfc_dev_err(&dev->interface->dev, "There is no active target");
1948 return;
1949 }
1950
1951 dev->tgt_active_prot = 0;
1952 skb_queue_purge(&dev->resp_q);
1953
1954 skb = pn533_alloc_skb(dev, sizeof(u8));
1955 if (!skb)
1956 return;
1957
1958 *skb_put(skb, 1) = 1; /* TG*/
1959
1960 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
1961 if (IS_ERR(resp))
1962 return;
1963
1964 rc = resp->data[0] & PN533_CMD_RET_MASK;
1965 if (rc != PN533_CMD_RET_SUCCESS)
1966 nfc_dev_err(&dev->interface->dev,
1967 "Error 0x%x when releasing the target", rc);
1968
1969 dev_kfree_skb(resp);
1970 return;
1971 }
1972
1973
1974 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
1975 struct sk_buff *resp)
1976 {
1977 struct pn533_cmd_jump_dep_response *rsp;
1978 u8 target_gt_len;
1979 int rc;
1980 u8 active = *(u8 *)arg;
1981
1982 kfree(arg);
1983
1984 if (IS_ERR(resp))
1985 return PTR_ERR(resp);
1986
1987 if (dev->tgt_available_prots &&
1988 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1989 nfc_dev_err(&dev->interface->dev,
1990 "The target does not support DEP");
1991 rc = -EINVAL;
1992 goto error;
1993 }
1994
1995 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1996
1997 rc = rsp->status & PN533_CMD_RET_MASK;
1998 if (rc != PN533_CMD_RET_SUCCESS) {
1999 nfc_dev_err(&dev->interface->dev,
2000 "Bringing DEP link up failed (error 0x%x)", rc);
2001 goto error;
2002 }
2003
2004 if (!dev->tgt_available_prots) {
2005 struct nfc_target nfc_target;
2006
2007 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
2008
2009 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2010 nfc_target.nfcid1_len = 10;
2011 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
2012 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
2013 if (rc)
2014 goto error;
2015
2016 dev->tgt_available_prots = 0;
2017 }
2018
2019 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
2020
2021 /* ATR_RES general bytes are located at offset 17 */
2022 target_gt_len = resp->len - 17;
2023 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
2024 rsp->gt, target_gt_len);
2025 if (rc == 0)
2026 rc = nfc_dep_link_is_up(dev->nfc_dev,
2027 dev->nfc_dev->targets[0].idx,
2028 !active, NFC_RF_INITIATOR);
2029
2030 error:
2031 dev_kfree_skb(resp);
2032 return rc;
2033 }
2034
2035 static int pn533_mod_to_baud(struct pn533 *dev)
2036 {
2037 switch (dev->poll_mod_curr) {
2038 case PN533_POLL_MOD_106KBPS_A:
2039 return 0;
2040 case PN533_POLL_MOD_212KBPS_FELICA:
2041 return 1;
2042 case PN533_POLL_MOD_424KBPS_FELICA:
2043 return 2;
2044 default:
2045 return -EINVAL;
2046 }
2047 }
2048
2049 #define PASSIVE_DATA_LEN 5
2050 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
2051 u8 comm_mode, u8 *gb, size_t gb_len)
2052 {
2053 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2054 struct sk_buff *skb;
2055 int rc, baud, skb_len;
2056 u8 *next, *arg;
2057
2058 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
2059
2060 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2061
2062 if (dev->poll_mod_count) {
2063 nfc_dev_err(&dev->interface->dev,
2064 "Cannot bring the DEP link up while polling");
2065 return -EBUSY;
2066 }
2067
2068 if (dev->tgt_active_prot) {
2069 nfc_dev_err(&dev->interface->dev,
2070 "There is already an active target");
2071 return -EBUSY;
2072 }
2073
2074 baud = pn533_mod_to_baud(dev);
2075 if (baud < 0) {
2076 nfc_dev_err(&dev->interface->dev,
2077 "Invalid curr modulation %d", dev->poll_mod_curr);
2078 return baud;
2079 }
2080
2081 skb_len = 3 + gb_len; /* ActPass + BR + Next */
2082 if (comm_mode == NFC_COMM_PASSIVE)
2083 skb_len += PASSIVE_DATA_LEN;
2084
2085 skb = pn533_alloc_skb(dev, skb_len);
2086 if (!skb)
2087 return -ENOMEM;
2088
2089 *skb_put(skb, 1) = !comm_mode; /* ActPass */
2090 *skb_put(skb, 1) = baud; /* Baud rate */
2091
2092 next = skb_put(skb, 1); /* Next */
2093 *next = 0;
2094
2095 if (comm_mode == NFC_COMM_PASSIVE && baud > 0) {
2096 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data,
2097 PASSIVE_DATA_LEN);
2098 *next |= 1;
2099 }
2100
2101 if (gb != NULL && gb_len > 0) {
2102 memcpy(skb_put(skb, gb_len), gb, gb_len);
2103 *next |= 4; /* We have some Gi */
2104 } else {
2105 *next = 0;
2106 }
2107
2108 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2109 if (!arg) {
2110 dev_kfree_skb(skb);
2111 return -ENOMEM;
2112 }
2113
2114 *arg = !comm_mode;
2115
2116 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
2117 pn533_in_dep_link_up_complete, arg);
2118
2119 if (rc < 0) {
2120 dev_kfree_skb(skb);
2121 kfree(arg);
2122 }
2123
2124 return rc;
2125 }
2126
2127 static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
2128 {
2129 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2130
2131 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2132
2133 pn533_poll_reset_mod_list(dev);
2134
2135 if (dev->tgt_mode || dev->tgt_active_prot)
2136 pn533_abort_cmd(dev, GFP_KERNEL);
2137
2138 dev->tgt_active_prot = 0;
2139 dev->tgt_mode = 0;
2140
2141 skb_queue_purge(&dev->resp_q);
2142
2143 return 0;
2144 }
2145
2146 struct pn533_data_exchange_arg {
2147 data_exchange_cb_t cb;
2148 void *cb_context;
2149 };
2150
2151 static struct sk_buff *pn533_build_response(struct pn533 *dev)
2152 {
2153 struct sk_buff *skb, *tmp, *t;
2154 unsigned int skb_len = 0, tmp_len = 0;
2155
2156 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2157
2158 if (skb_queue_empty(&dev->resp_q))
2159 return NULL;
2160
2161 if (skb_queue_len(&dev->resp_q) == 1) {
2162 skb = skb_dequeue(&dev->resp_q);
2163 goto out;
2164 }
2165
2166 skb_queue_walk_safe(&dev->resp_q, tmp, t)
2167 skb_len += tmp->len;
2168
2169 nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
2170 __func__, skb_len);
2171
2172 skb = alloc_skb(skb_len, GFP_KERNEL);
2173 if (skb == NULL)
2174 goto out;
2175
2176 skb_put(skb, skb_len);
2177
2178 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2179 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2180 tmp_len += tmp->len;
2181 }
2182
2183 out:
2184 skb_queue_purge(&dev->resp_q);
2185
2186 return skb;
2187 }
2188
2189 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
2190 struct sk_buff *resp)
2191 {
2192 struct pn533_data_exchange_arg *arg = _arg;
2193 struct sk_buff *skb;
2194 int rc = 0;
2195 u8 status, ret, mi;
2196
2197 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2198
2199 if (IS_ERR(resp)) {
2200 rc = PTR_ERR(resp);
2201 goto _error;
2202 }
2203
2204 status = resp->data[0];
2205 ret = status & PN533_CMD_RET_MASK;
2206 mi = status & PN533_CMD_MI_MASK;
2207
2208 skb_pull(resp, sizeof(status));
2209
2210 if (ret != PN533_CMD_RET_SUCCESS) {
2211 nfc_dev_err(&dev->interface->dev,
2212 "Exchanging data failed (error 0x%x)", ret);
2213 rc = -EIO;
2214 goto error;
2215 }
2216
2217 skb_queue_tail(&dev->resp_q, resp);
2218
2219 if (mi) {
2220 dev->cmd_complete_mi_arg = arg;
2221 queue_work(dev->wq, &dev->mi_work);
2222 return -EINPROGRESS;
2223 }
2224
2225 skb = pn533_build_response(dev);
2226 if (!skb)
2227 goto error;
2228
2229 arg->cb(arg->cb_context, skb, 0);
2230 kfree(arg);
2231 return 0;
2232
2233 error:
2234 dev_kfree_skb(resp);
2235 _error:
2236 skb_queue_purge(&dev->resp_q);
2237 arg->cb(arg->cb_context, NULL, rc);
2238 kfree(arg);
2239 return rc;
2240 }
2241
2242 static int pn533_transceive(struct nfc_dev *nfc_dev,
2243 struct nfc_target *target, struct sk_buff *skb,
2244 data_exchange_cb_t cb, void *cb_context)
2245 {
2246 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2247 struct pn533_data_exchange_arg *arg = NULL;
2248 int rc;
2249
2250 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2251
2252 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2253 /* TODO: Implement support to multi-part data exchange */
2254 nfc_dev_err(&dev->interface->dev,
2255 "Data length greater than the max allowed: %d",
2256 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2257 rc = -ENOSYS;
2258 goto error;
2259 }
2260
2261 if (!dev->tgt_active_prot) {
2262 nfc_dev_err(&dev->interface->dev,
2263 "Can't exchange data if there is no active target");
2264 rc = -EINVAL;
2265 goto error;
2266 }
2267
2268 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2269 if (!arg) {
2270 rc = -ENOMEM;
2271 goto error;
2272 }
2273
2274 arg->cb = cb;
2275 arg->cb_context = cb_context;
2276
2277 switch (dev->device_type) {
2278 case PN533_DEVICE_PASORI:
2279 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2280 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2281 skb,
2282 pn533_data_exchange_complete,
2283 arg);
2284
2285 break;
2286 }
2287 default:
2288 *skb_push(skb, sizeof(u8)) = 1; /*TG*/
2289
2290 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2291 skb, pn533_data_exchange_complete,
2292 arg);
2293
2294 break;
2295 }
2296
2297 if (rc < 0) /* rc from send_async */
2298 goto error;
2299
2300 return 0;
2301
2302 error:
2303 kfree(arg);
2304 dev_kfree_skb(skb);
2305 return rc;
2306 }
2307
2308 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
2309 struct sk_buff *resp)
2310 {
2311 u8 status;
2312
2313 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2314
2315 if (IS_ERR(resp))
2316 return PTR_ERR(resp);
2317
2318 status = resp->data[0];
2319
2320 dev_kfree_skb(resp);
2321
2322 if (status != 0) {
2323 nfc_tm_deactivated(dev->nfc_dev);
2324
2325 dev->tgt_mode = 0;
2326
2327 return 0;
2328 }
2329
2330 queue_work(dev->wq, &dev->tg_work);
2331
2332 return 0;
2333 }
2334
2335 static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2336 {
2337 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2338 int rc;
2339
2340 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2341
2342 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2343 nfc_dev_err(&dev->interface->dev,
2344 "Data length greater than the max allowed: %d",
2345 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2346 return -ENOSYS;
2347 }
2348
2349 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2350 pn533_tm_send_complete, NULL);
2351 if (rc < 0)
2352 dev_kfree_skb(skb);
2353
2354 return rc;
2355 }
2356
2357 static void pn533_wq_mi_recv(struct work_struct *work)
2358 {
2359 struct pn533 *dev = container_of(work, struct pn533, mi_work);
2360
2361 struct sk_buff *skb;
2362 int rc;
2363
2364 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2365
2366 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
2367 if (!skb)
2368 goto error;
2369
2370 switch (dev->device_type) {
2371 case PN533_DEVICE_PASORI:
2372 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2373 rc = pn533_send_cmd_direct_async(dev,
2374 PN533_CMD_IN_COMM_THRU,
2375 skb,
2376 pn533_data_exchange_complete,
2377 dev->cmd_complete_mi_arg);
2378
2379 break;
2380 }
2381 default:
2382 *skb_put(skb, sizeof(u8)) = 1; /*TG*/
2383
2384 rc = pn533_send_cmd_direct_async(dev,
2385 PN533_CMD_IN_DATA_EXCHANGE,
2386 skb,
2387 pn533_data_exchange_complete,
2388 dev->cmd_complete_mi_arg);
2389
2390 break;
2391 }
2392
2393 if (rc == 0) /* success */
2394 return;
2395
2396 nfc_dev_err(&dev->interface->dev,
2397 "Error %d when trying to perform data_exchange", rc);
2398
2399 dev_kfree_skb(skb);
2400 kfree(dev->cmd_complete_mi_arg);
2401
2402 error:
2403 pn533_send_ack(dev, GFP_KERNEL);
2404 queue_work(dev->wq, &dev->cmd_work);
2405 }
2406
2407 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2408 u8 cfgdata_len)
2409 {
2410 struct sk_buff *skb;
2411 struct sk_buff *resp;
2412
2413 int skb_len;
2414
2415 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2416
2417 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
2418
2419 skb = pn533_alloc_skb(dev, skb_len);
2420 if (!skb)
2421 return -ENOMEM;
2422
2423 *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2424 memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
2425
2426 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2427 if (IS_ERR(resp))
2428 return PTR_ERR(resp);
2429
2430 dev_kfree_skb(resp);
2431 return 0;
2432 }
2433
2434 static int pn533_get_firmware_version(struct pn533 *dev,
2435 struct pn533_fw_version *fv)
2436 {
2437 struct sk_buff *skb;
2438 struct sk_buff *resp;
2439
2440 skb = pn533_alloc_skb(dev, 0);
2441 if (!skb)
2442 return -ENOMEM;
2443
2444 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2445 if (IS_ERR(resp))
2446 return PTR_ERR(resp);
2447
2448 fv->ic = resp->data[0];
2449 fv->ver = resp->data[1];
2450 fv->rev = resp->data[2];
2451 fv->support = resp->data[3];
2452
2453 dev_kfree_skb(resp);
2454 return 0;
2455 }
2456
2457 static int pn533_pasori_fw_reset(struct pn533 *dev)
2458 {
2459 struct sk_buff *skb;
2460 struct sk_buff *resp;
2461
2462 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2463
2464 skb = pn533_alloc_skb(dev, sizeof(u8));
2465 if (!skb)
2466 return -ENOMEM;
2467
2468 *skb_put(skb, sizeof(u8)) = 0x1;
2469
2470 resp = pn533_send_cmd_sync(dev, 0x18, skb);
2471 if (IS_ERR(resp))
2472 return PTR_ERR(resp);
2473
2474 dev_kfree_skb(resp);
2475
2476 return 0;
2477 }
2478
2479 struct pn533_acr122_poweron_rdr_arg {
2480 int rc;
2481 struct completion done;
2482 };
2483
2484 static void pn533_acr122_poweron_rdr_resp(struct urb *urb)
2485 {
2486 struct pn533_acr122_poweron_rdr_arg *arg = urb->context;
2487
2488 nfc_dev_dbg(&urb->dev->dev, "%s", __func__);
2489
2490 print_hex_dump(KERN_ERR, "ACR122 RX: ", DUMP_PREFIX_NONE, 16, 1,
2491 urb->transfer_buffer, urb->transfer_buffer_length,
2492 false);
2493
2494 arg->rc = urb->status;
2495 complete(&arg->done);
2496 }
2497
2498 static int pn533_acr122_poweron_rdr(struct pn533 *dev)
2499 {
2500 /* Power on th reader (CCID cmd) */
2501 u8 cmd[10] = {PN533_ACR122_PC_TO_RDR_ICCPOWERON,
2502 0, 0, 0, 0, 0, 0, 3, 0, 0};
2503 u8 buf[255];
2504 int rc;
2505 void *cntx;
2506 struct pn533_acr122_poweron_rdr_arg arg;
2507
2508 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2509
2510 init_completion(&arg.done);
2511 cntx = dev->in_urb->context; /* backup context */
2512
2513 dev->in_urb->transfer_buffer = buf;
2514 dev->in_urb->transfer_buffer_length = 255;
2515 dev->in_urb->complete = pn533_acr122_poweron_rdr_resp;
2516 dev->in_urb->context = &arg;
2517
2518 dev->out_urb->transfer_buffer = cmd;
2519 dev->out_urb->transfer_buffer_length = sizeof(cmd);
2520
2521 print_hex_dump(KERN_ERR, "ACR122 TX: ", DUMP_PREFIX_NONE, 16, 1,
2522 cmd, sizeof(cmd), false);
2523
2524 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
2525 if (rc) {
2526 nfc_dev_err(&dev->interface->dev,
2527 "Reader power on cmd error %d", rc);
2528 return rc;
2529 }
2530
2531 rc = usb_submit_urb(dev->in_urb, GFP_KERNEL);
2532 if (rc) {
2533 nfc_dev_err(&dev->interface->dev,
2534 "Can't submit for reader power on cmd response %d",
2535 rc);
2536 return rc;
2537 }
2538
2539 wait_for_completion(&arg.done);
2540 dev->in_urb->context = cntx; /* restore context */
2541
2542 return arg.rc;
2543 }
2544
2545 static struct nfc_ops pn533_nfc_ops = {
2546 .dev_up = NULL,
2547 .dev_down = NULL,
2548 .dep_link_up = pn533_dep_link_up,
2549 .dep_link_down = pn533_dep_link_down,
2550 .start_poll = pn533_start_poll,
2551 .stop_poll = pn533_stop_poll,
2552 .activate_target = pn533_activate_target,
2553 .deactivate_target = pn533_deactivate_target,
2554 .im_transceive = pn533_transceive,
2555 .tm_send = pn533_tm_send,
2556 };
2557
2558 static int pn533_setup(struct pn533 *dev)
2559 {
2560 struct pn533_config_max_retries max_retries;
2561 struct pn533_config_timing timing;
2562 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2563 int rc;
2564
2565 switch (dev->device_type) {
2566 case PN533_DEVICE_STD:
2567 max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
2568 max_retries.mx_rty_psl = 2;
2569 max_retries.mx_rty_passive_act =
2570 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2571
2572 timing.rfu = PN533_CONFIG_TIMING_102;
2573 timing.atr_res_timeout = PN533_CONFIG_TIMING_204;
2574 timing.dep_timeout = PN533_CONFIG_TIMING_409;
2575
2576 break;
2577
2578 case PN533_DEVICE_PASORI:
2579 case PN533_DEVICE_ACR122U:
2580 max_retries.mx_rty_atr = 0x2;
2581 max_retries.mx_rty_psl = 0x1;
2582 max_retries.mx_rty_passive_act =
2583 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2584
2585 timing.rfu = PN533_CONFIG_TIMING_102;
2586 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2587 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2588
2589 break;
2590
2591 default:
2592 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2593 dev->device_type);
2594 return -EINVAL;
2595 }
2596
2597 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2598 (u8 *)&max_retries, sizeof(max_retries));
2599 if (rc) {
2600 nfc_dev_err(&dev->interface->dev,
2601 "Error on setting MAX_RETRIES config");
2602 return rc;
2603 }
2604
2605
2606 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2607 (u8 *)&timing, sizeof(timing));
2608 if (rc) {
2609 nfc_dev_err(&dev->interface->dev,
2610 "Error on setting RF timings");
2611 return rc;
2612 }
2613
2614 switch (dev->device_type) {
2615 case PN533_DEVICE_STD:
2616 break;
2617
2618 case PN533_DEVICE_PASORI:
2619 pn533_pasori_fw_reset(dev);
2620
2621 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2622 pasori_cfg, 3);
2623 if (rc) {
2624 nfc_dev_err(&dev->interface->dev,
2625 "Error while settings PASORI config");
2626 return rc;
2627 }
2628
2629 pn533_pasori_fw_reset(dev);
2630
2631 break;
2632 }
2633
2634 return 0;
2635 }
2636
2637 static int pn533_probe(struct usb_interface *interface,
2638 const struct usb_device_id *id)
2639 {
2640 struct pn533_fw_version fw_ver;
2641 struct pn533 *dev;
2642 struct usb_host_interface *iface_desc;
2643 struct usb_endpoint_descriptor *endpoint;
2644 int in_endpoint = 0;
2645 int out_endpoint = 0;
2646 int rc = -ENOMEM;
2647 int i;
2648 u32 protocols;
2649
2650 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2651 if (!dev)
2652 return -ENOMEM;
2653
2654 dev->udev = usb_get_dev(interface_to_usbdev(interface));
2655 dev->interface = interface;
2656 mutex_init(&dev->cmd_lock);
2657
2658 iface_desc = interface->cur_altsetting;
2659 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2660 endpoint = &iface_desc->endpoint[i].desc;
2661
2662 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
2663 in_endpoint = endpoint->bEndpointAddress;
2664
2665 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
2666 out_endpoint = endpoint->bEndpointAddress;
2667 }
2668
2669 if (!in_endpoint || !out_endpoint) {
2670 nfc_dev_err(&interface->dev,
2671 "Could not find bulk-in or bulk-out endpoint");
2672 rc = -ENODEV;
2673 goto error;
2674 }
2675
2676 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
2677 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
2678
2679 if (!dev->in_urb || !dev->out_urb)
2680 goto error;
2681
2682 usb_fill_bulk_urb(dev->in_urb, dev->udev,
2683 usb_rcvbulkpipe(dev->udev, in_endpoint),
2684 NULL, 0, NULL, dev);
2685 usb_fill_bulk_urb(dev->out_urb, dev->udev,
2686 usb_sndbulkpipe(dev->udev, out_endpoint),
2687 NULL, 0, pn533_send_complete, dev);
2688
2689 INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
2690 INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
2691 INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
2692 INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
2693 INIT_WORK(&dev->poll_work, pn533_wq_poll);
2694 dev->wq = alloc_ordered_workqueue("pn533", 0);
2695 if (dev->wq == NULL)
2696 goto error;
2697
2698 init_timer(&dev->listen_timer);
2699 dev->listen_timer.data = (unsigned long) dev;
2700 dev->listen_timer.function = pn533_listen_mode_timer;
2701
2702 skb_queue_head_init(&dev->resp_q);
2703
2704 INIT_LIST_HEAD(&dev->cmd_queue);
2705
2706 usb_set_intfdata(interface, dev);
2707
2708 dev->ops = &pn533_std_frame_ops;
2709
2710 dev->protocol_type = PN533_PROTO_REQ_ACK_RESP;
2711 dev->device_type = id->driver_info;
2712 switch (dev->device_type) {
2713 case PN533_DEVICE_STD:
2714 protocols = PN533_ALL_PROTOCOLS;
2715 break;
2716
2717 case PN533_DEVICE_PASORI:
2718 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2719 break;
2720
2721 case PN533_DEVICE_ACR122U:
2722 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2723 dev->ops = &pn533_acr122_frame_ops;
2724 dev->protocol_type = PN533_PROTO_REQ_RESP,
2725
2726 rc = pn533_acr122_poweron_rdr(dev);
2727 if (rc < 0) {
2728 nfc_dev_err(&dev->interface->dev,
2729 "Couldn't poweron the reader (error %d)",
2730 rc);
2731 goto destroy_wq;
2732 }
2733 break;
2734
2735 default:
2736 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2737 dev->device_type);
2738 rc = -EINVAL;
2739 goto destroy_wq;
2740 }
2741
2742 memset(&fw_ver, 0, sizeof(fw_ver));
2743 rc = pn533_get_firmware_version(dev, &fw_ver);
2744 if (rc < 0)
2745 goto destroy_wq;
2746
2747 nfc_dev_info(&dev->interface->dev,
2748 "NXP PN533 firmware ver %d.%d now attached",
2749 fw_ver.ver, fw_ver.rev);
2750
2751
2752 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
2753 NFC_SE_NONE,
2754 dev->ops->tx_header_len +
2755 PN533_CMD_DATAEXCH_HEAD_LEN,
2756 dev->ops->tx_tail_len);
2757 if (!dev->nfc_dev)
2758 goto destroy_wq;
2759
2760 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
2761 nfc_set_drvdata(dev->nfc_dev, dev);
2762
2763 rc = nfc_register_device(dev->nfc_dev);
2764 if (rc)
2765 goto free_nfc_dev;
2766
2767 rc = pn533_setup(dev);
2768 if (rc)
2769 goto unregister_nfc_dev;
2770
2771 return 0;
2772
2773 unregister_nfc_dev:
2774 nfc_unregister_device(dev->nfc_dev);
2775
2776 free_nfc_dev:
2777 nfc_free_device(dev->nfc_dev);
2778
2779 destroy_wq:
2780 destroy_workqueue(dev->wq);
2781 error:
2782 usb_free_urb(dev->in_urb);
2783 usb_free_urb(dev->out_urb);
2784 kfree(dev);
2785 return rc;
2786 }
2787
2788 static void pn533_disconnect(struct usb_interface *interface)
2789 {
2790 struct pn533 *dev;
2791 struct pn533_cmd *cmd, *n;
2792
2793 dev = usb_get_intfdata(interface);
2794 usb_set_intfdata(interface, NULL);
2795
2796 nfc_unregister_device(dev->nfc_dev);
2797 nfc_free_device(dev->nfc_dev);
2798
2799 usb_kill_urb(dev->in_urb);
2800 usb_kill_urb(dev->out_urb);
2801
2802 destroy_workqueue(dev->wq);
2803
2804 skb_queue_purge(&dev->resp_q);
2805
2806 del_timer(&dev->listen_timer);
2807
2808 list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
2809 list_del(&cmd->queue);
2810 kfree(cmd);
2811 }
2812
2813 usb_free_urb(dev->in_urb);
2814 usb_free_urb(dev->out_urb);
2815 kfree(dev);
2816
2817 nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
2818 }
2819
2820 static struct usb_driver pn533_driver = {
2821 .name = "pn533",
2822 .probe = pn533_probe,
2823 .disconnect = pn533_disconnect,
2824 .id_table = pn533_table,
2825 };
2826
2827 module_usb_driver(pn533_driver);
2828
2829 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
2830 MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2831 MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
2832 MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
2833 MODULE_VERSION(VERSION);
2834 MODULE_LICENSE("GPL");
ubuntu-zesty-kernel mirror