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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
[linux-2.6.git] / drivers / nfc / pn533.c
blobdaf92ac209f898d87ab2b3e08df379248da7e7a0
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 "0.2"
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_send_async_complete_t) (struct pn533 *dev, void *arg,
153 struct sk_buff *resp);
154
155 /* structs for pn533 commands */
156
157 /* PN533_CMD_GET_FIRMWARE_VERSION */
158 struct pn533_fw_version {
159 u8 ic;
160 u8 ver;
161 u8 rev;
162 u8 support;
163 };
164
165 /* PN533_CMD_RF_CONFIGURATION */
166 #define PN533_CFGITEM_RF_FIELD 0x01
167 #define PN533_CFGITEM_TIMING 0x02
168 #define PN533_CFGITEM_MAX_RETRIES 0x05
169 #define PN533_CFGITEM_PASORI 0x82
170
171 #define PN533_CFGITEM_RF_FIELD_ON 0x1
172 #define PN533_CFGITEM_RF_FIELD_OFF 0x0
173
174 #define PN533_CONFIG_TIMING_102 0xb
175 #define PN533_CONFIG_TIMING_204 0xc
176 #define PN533_CONFIG_TIMING_409 0xd
177 #define PN533_CONFIG_TIMING_819 0xe
178
179 #define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
180 #define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
181
182 struct pn533_config_max_retries {
183 u8 mx_rty_atr;
184 u8 mx_rty_psl;
185 u8 mx_rty_passive_act;
186 } __packed;
187
188 struct pn533_config_timing {
189 u8 rfu;
190 u8 atr_res_timeout;
191 u8 dep_timeout;
192 } __packed;
193
194 /* PN533_CMD_IN_LIST_PASSIVE_TARGET */
195
196 /* felica commands opcode */
197 #define PN533_FELICA_OPC_SENSF_REQ 0
198 #define PN533_FELICA_OPC_SENSF_RES 1
199 /* felica SENSF_REQ parameters */
200 #define PN533_FELICA_SENSF_SC_ALL 0xFFFF
201 #define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
202 #define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
203 #define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
204
205 /* type B initiator_data values */
206 #define PN533_TYPE_B_AFI_ALL_FAMILIES 0
207 #define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
208 #define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
209
210 union pn533_cmd_poll_initdata {
211 struct {
212 u8 afi;
213 u8 polling_method;
214 } __packed type_b;
215 struct {
216 u8 opcode;
217 __be16 sc;
218 u8 rc;
219 u8 tsn;
220 } __packed felica;
221 };
222
223 /* Poll modulations */
224 enum {
225 PN533_POLL_MOD_106KBPS_A,
226 PN533_POLL_MOD_212KBPS_FELICA,
227 PN533_POLL_MOD_424KBPS_FELICA,
228 PN533_POLL_MOD_106KBPS_JEWEL,
229 PN533_POLL_MOD_847KBPS_B,
230 PN533_LISTEN_MOD,
231
232 __PN533_POLL_MOD_AFTER_LAST,
233 };
234 #define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
235
236 struct pn533_poll_modulations {
237 struct {
238 u8 maxtg;
239 u8 brty;
240 union pn533_cmd_poll_initdata initiator_data;
241 } __packed data;
242 u8 len;
243 };
244
245 static const struct pn533_poll_modulations poll_mod[] = {
246 [PN533_POLL_MOD_106KBPS_A] = {
247 .data = {
248 .maxtg = 1,
249 .brty = 0,
250 },
251 .len = 2,
252 },
253 [PN533_POLL_MOD_212KBPS_FELICA] = {
254 .data = {
255 .maxtg = 1,
256 .brty = 1,
257 .initiator_data.felica = {
258 .opcode = PN533_FELICA_OPC_SENSF_REQ,
259 .sc = PN533_FELICA_SENSF_SC_ALL,
260 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
261 .tsn = 0x03,
262 },
263 },
264 .len = 7,
265 },
266 [PN533_POLL_MOD_424KBPS_FELICA] = {
267 .data = {
268 .maxtg = 1,
269 .brty = 2,
270 .initiator_data.felica = {
271 .opcode = PN533_FELICA_OPC_SENSF_REQ,
272 .sc = PN533_FELICA_SENSF_SC_ALL,
273 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
274 .tsn = 0x03,
275 },
276 },
277 .len = 7,
278 },
279 [PN533_POLL_MOD_106KBPS_JEWEL] = {
280 .data = {
281 .maxtg = 1,
282 .brty = 4,
283 },
284 .len = 2,
285 },
286 [PN533_POLL_MOD_847KBPS_B] = {
287 .data = {
288 .maxtg = 1,
289 .brty = 8,
290 .initiator_data.type_b = {
291 .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
292 .polling_method =
293 PN533_TYPE_B_POLL_METHOD_TIMESLOT,
294 },
295 },
296 .len = 3,
297 },
298 [PN533_LISTEN_MOD] = {
299 .len = 0,
300 },
301 };
302
303 /* PN533_CMD_IN_ATR */
304
305 struct pn533_cmd_activate_response {
306 u8 status;
307 u8 nfcid3t[10];
308 u8 didt;
309 u8 bst;
310 u8 brt;
311 u8 to;
312 u8 ppt;
313 /* optional */
314 u8 gt[];
315 } __packed;
316
317 struct pn533_cmd_jump_dep_response {
318 u8 status;
319 u8 tg;
320 u8 nfcid3t[10];
321 u8 didt;
322 u8 bst;
323 u8 brt;
324 u8 to;
325 u8 ppt;
326 /* optional */
327 u8 gt[];
328 } __packed;
329
330
331 /* PN533_TG_INIT_AS_TARGET */
332 #define PN533_INIT_TARGET_PASSIVE 0x1
333 #define PN533_INIT_TARGET_DEP 0x2
334
335 #define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
336 #define PN533_INIT_TARGET_RESP_ACTIVE 0x1
337 #define PN533_INIT_TARGET_RESP_DEP 0x4
338
339 enum pn533_protocol_type {
340 PN533_PROTO_REQ_ACK_RESP = 0,
341 PN533_PROTO_REQ_RESP
342 };
343
344 struct pn533 {
345 struct usb_device *udev;
346 struct usb_interface *interface;
347 struct nfc_dev *nfc_dev;
348 u32 device_type;
349 enum pn533_protocol_type protocol_type;
350
351 struct urb *out_urb;
352 struct urb *in_urb;
353
354 struct sk_buff_head resp_q;
355
356 struct workqueue_struct *wq;
357 struct work_struct cmd_work;
358 struct work_struct cmd_complete_work;
359 struct work_struct poll_work;
360 struct work_struct mi_work;
361 struct work_struct tg_work;
362
363 struct list_head cmd_queue;
364 struct pn533_cmd *cmd;
365 u8 cmd_pending;
366 struct mutex cmd_lock; /* protects cmd queue */
367
368 void *cmd_complete_mi_arg;
369
370 struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
371 u8 poll_mod_count;
372 u8 poll_mod_curr;
373 u32 poll_protocols;
374 u32 listen_protocols;
375 struct timer_list listen_timer;
376 int cancel_listen;
377
378 u8 *gb;
379 size_t gb_len;
380
381 u8 tgt_available_prots;
382 u8 tgt_active_prot;
383 u8 tgt_mode;
384
385 struct pn533_frame_ops *ops;
386 };
387
388 struct pn533_cmd {
389 struct list_head queue;
390 u8 code;
391 int status;
392 struct sk_buff *req;
393 struct sk_buff *resp;
394 int resp_len;
395 pn533_send_async_complete_t complete_cb;
396 void *complete_cb_context;
397 };
398
399 struct pn533_std_frame {
400 u8 preamble;
401 __be16 start_frame;
402 u8 datalen;
403 u8 datalen_checksum;
404 u8 data[];
405 } __packed;
406
407 struct pn533_frame_ops {
408 void (*tx_frame_init)(void *frame, u8 cmd_code);
409 void (*tx_frame_finish)(void *frame);
410 void (*tx_update_payload_len)(void *frame, int len);
411 int tx_header_len;
412 int tx_tail_len;
413
414 bool (*rx_is_frame_valid)(void *frame);
415 int (*rx_frame_size)(void *frame);
416 int rx_header_len;
417 int rx_tail_len;
418
419 int max_payload_len;
420 u8 (*get_cmd_code)(void *frame);
421 };
422
423 struct pn533_acr122_ccid_hdr {
424 u8 type;
425 u32 datalen;
426 u8 slot;
427 u8 seq;
428 u8 params[3]; /* 3 msg specific bytes or status, error and 1 specific
429 byte for reposnse msg */
430 u8 data[]; /* payload */
431 } __packed;
432
433 struct pn533_acr122_apdu_hdr {
434 u8 class;
435 u8 ins;
436 u8 p1;
437 u8 p2;
438 } __packed;
439
440 struct pn533_acr122_tx_frame {
441 struct pn533_acr122_ccid_hdr ccid;
442 struct pn533_acr122_apdu_hdr apdu;
443 u8 datalen;
444 u8 data[]; /* pn533 frame: TFI ... */
445 } __packed;
446
447 struct pn533_acr122_rx_frame {
448 struct pn533_acr122_ccid_hdr ccid;
449 u8 data[]; /* pn533 frame : TFI ... */
450 } __packed;
451
452 static void pn533_acr122_tx_frame_init(void *_frame, u8 cmd_code)
453 {
454 struct pn533_acr122_tx_frame *frame = _frame;
455
456 frame->ccid.type = PN533_ACR122_PC_TO_RDR_ESCAPE;
457 frame->ccid.datalen = sizeof(frame->apdu) + 1; /* sizeof(apdu_hdr) +
458 sizeof(datalen) */
459 frame->ccid.slot = 0;
460 frame->ccid.seq = 0;
461 frame->ccid.params[0] = 0;
462 frame->ccid.params[1] = 0;
463 frame->ccid.params[2] = 0;
464
465 frame->data[0] = PN533_STD_FRAME_DIR_OUT;
466 frame->data[1] = cmd_code;
467 frame->datalen = 2; /* data[0] + data[1] */
468
469 frame->apdu.class = 0xFF;
470 frame->apdu.ins = 0;
471 frame->apdu.p1 = 0;
472 frame->apdu.p2 = 0;
473 }
474
475 static void pn533_acr122_tx_frame_finish(void *_frame)
476 {
477 struct pn533_acr122_tx_frame *frame = _frame;
478
479 frame->ccid.datalen += frame->datalen;
480 }
481
482 static void pn533_acr122_tx_update_payload_len(void *_frame, int len)
483 {
484 struct pn533_acr122_tx_frame *frame = _frame;
485
486 frame->datalen += len;
487 }
488
489 static bool pn533_acr122_is_rx_frame_valid(void *_frame)
490 {
491 struct pn533_acr122_rx_frame *frame = _frame;
492
493 if (frame->ccid.type != 0x83)
494 return false;
495
496 if (frame->data[frame->ccid.datalen - 2] == 0x63)
497 return false;
498
499 return true;
500 }
501
502 static int pn533_acr122_rx_frame_size(void *frame)
503 {
504 struct pn533_acr122_rx_frame *f = frame;
505
506 /* f->ccid.datalen already includes tail length */
507 return sizeof(struct pn533_acr122_rx_frame) + f->ccid.datalen;
508 }
509
510 static u8 pn533_acr122_get_cmd_code(void *frame)
511 {
512 struct pn533_acr122_rx_frame *f = frame;
513
514 return PN533_STD_FRAME_CMD(f);
515 }
516
517 static struct pn533_frame_ops pn533_acr122_frame_ops = {
518 .tx_frame_init = pn533_acr122_tx_frame_init,
519 .tx_frame_finish = pn533_acr122_tx_frame_finish,
520 .tx_update_payload_len = pn533_acr122_tx_update_payload_len,
521 .tx_header_len = PN533_ACR122_TX_FRAME_HEADER_LEN,
522 .tx_tail_len = PN533_ACR122_TX_FRAME_TAIL_LEN,
523
524 .rx_is_frame_valid = pn533_acr122_is_rx_frame_valid,
525 .rx_header_len = PN533_ACR122_RX_FRAME_HEADER_LEN,
526 .rx_tail_len = PN533_ACR122_RX_FRAME_TAIL_LEN,
527 .rx_frame_size = pn533_acr122_rx_frame_size,
528
529 .max_payload_len = PN533_ACR122_FRAME_MAX_PAYLOAD_LEN,
530 .get_cmd_code = pn533_acr122_get_cmd_code,
531 };
532
533 /* The rule: value + checksum = 0 */
534 static inline u8 pn533_std_checksum(u8 value)
535 {
536 return ~value + 1;
537 }
538
539 /* The rule: sum(data elements) + checksum = 0 */
540 static u8 pn533_std_data_checksum(u8 *data, int datalen)
541 {
542 u8 sum = 0;
543 int i;
544
545 for (i = 0; i < datalen; i++)
546 sum += data[i];
547
548 return pn533_std_checksum(sum);
549 }
550
551 static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
552 {
553 struct pn533_std_frame *frame = _frame;
554
555 frame->preamble = 0;
556 frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
557 PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
558 PN533_STD_FRAME_CMD(frame) = cmd_code;
559 frame->datalen = 2;
560 }
561
562 static void pn533_std_tx_frame_finish(void *_frame)
563 {
564 struct pn533_std_frame *frame = _frame;
565
566 frame->datalen_checksum = pn533_std_checksum(frame->datalen);
567
568 PN533_STD_FRAME_CHECKSUM(frame) =
569 pn533_std_data_checksum(frame->data, frame->datalen);
570
571 PN533_STD_FRAME_POSTAMBLE(frame) = 0;
572 }
573
574 static void pn533_std_tx_update_payload_len(void *_frame, int len)
575 {
576 struct pn533_std_frame *frame = _frame;
577
578 frame->datalen += len;
579 }
580
581 static bool pn533_std_rx_frame_is_valid(void *_frame)
582 {
583 u8 checksum;
584 struct pn533_std_frame *frame = _frame;
585
586 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
587 return false;
588
589 checksum = pn533_std_checksum(frame->datalen);
590 if (checksum != frame->datalen_checksum)
591 return false;
592
593 checksum = pn533_std_data_checksum(frame->data, frame->datalen);
594 if (checksum != PN533_STD_FRAME_CHECKSUM(frame))
595 return false;
596
597 return true;
598 }
599
600 static bool pn533_std_rx_frame_is_ack(struct pn533_std_frame *frame)
601 {
602 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
603 return false;
604
605 if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
606 return false;
607
608 return true;
609 }
610
611 static inline int pn533_std_rx_frame_size(void *frame)
612 {
613 struct pn533_std_frame *f = frame;
614
615 return sizeof(struct pn533_std_frame) + f->datalen +
616 PN533_STD_FRAME_TAIL_LEN;
617 }
618
619 static u8 pn533_std_get_cmd_code(void *frame)
620 {
621 struct pn533_std_frame *f = frame;
622
623 return PN533_STD_FRAME_CMD(f);
624 }
625
626 static struct pn533_frame_ops pn533_std_frame_ops = {
627 .tx_frame_init = pn533_std_tx_frame_init,
628 .tx_frame_finish = pn533_std_tx_frame_finish,
629 .tx_update_payload_len = pn533_std_tx_update_payload_len,
630 .tx_header_len = PN533_STD_FRAME_HEADER_LEN,
631 .tx_tail_len = PN533_STD_FRAME_TAIL_LEN,
632
633 .rx_is_frame_valid = pn533_std_rx_frame_is_valid,
634 .rx_frame_size = pn533_std_rx_frame_size,
635 .rx_header_len = PN533_STD_FRAME_HEADER_LEN,
636 .rx_tail_len = PN533_STD_FRAME_TAIL_LEN,
637
638 .max_payload_len = PN533_STD_FRAME_MAX_PAYLOAD_LEN,
639 .get_cmd_code = pn533_std_get_cmd_code,
640 };
641
642 static bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
643 {
644 return (dev->ops->get_cmd_code(frame) ==
645 PN533_CMD_RESPONSE(dev->cmd->code));
646 }
647
648 static void pn533_recv_response(struct urb *urb)
649 {
650 struct pn533 *dev = urb->context;
651 struct pn533_cmd *cmd = dev->cmd;
652 u8 *in_frame;
653
654 cmd->status = urb->status;
655
656 switch (urb->status) {
657 case 0:
658 break; /* success */
659 case -ECONNRESET:
660 case -ENOENT:
661 nfc_dev_dbg(&dev->interface->dev,
662 "The urb has been canceled (status %d)",
663 urb->status);
664 goto sched_wq;
665 case -ESHUTDOWN:
666 default:
667 nfc_dev_err(&dev->interface->dev,
668 "Urb failure (status %d)", urb->status);
669 goto sched_wq;
670 }
671
672 in_frame = dev->in_urb->transfer_buffer;
673
674 nfc_dev_dbg(&dev->interface->dev, "Received a frame.");
675 print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
676 dev->ops->rx_frame_size(in_frame), false);
677
678 if (!dev->ops->rx_is_frame_valid(in_frame)) {
679 nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
680 cmd->status = -EIO;
681 goto sched_wq;
682 }
683
684 if (!pn533_rx_frame_is_cmd_response(dev, in_frame)) {
685 nfc_dev_err(&dev->interface->dev,
686 "It it not the response to the last command");
687 cmd->status = -EIO;
688 goto sched_wq;
689 }
690
691 sched_wq:
692 queue_work(dev->wq, &dev->cmd_complete_work);
693 }
694
695 static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
696 {
697 dev->in_urb->complete = pn533_recv_response;
698
699 return usb_submit_urb(dev->in_urb, flags);
700 }
701
702 static void pn533_recv_ack(struct urb *urb)
703 {
704 struct pn533 *dev = urb->context;
705 struct pn533_cmd *cmd = dev->cmd;
706 struct pn533_std_frame *in_frame;
707 int rc;
708
709 cmd->status = urb->status;
710
711 switch (urb->status) {
712 case 0:
713 break; /* success */
714 case -ECONNRESET:
715 case -ENOENT:
716 nfc_dev_dbg(&dev->interface->dev,
717 "The urb has been stopped (status %d)",
718 urb->status);
719 goto sched_wq;
720 case -ESHUTDOWN:
721 default:
722 nfc_dev_err(&dev->interface->dev,
723 "Urb failure (status %d)", urb->status);
724 goto sched_wq;
725 }
726
727 in_frame = dev->in_urb->transfer_buffer;
728
729 if (!pn533_std_rx_frame_is_ack(in_frame)) {
730 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
731 cmd->status = -EIO;
732 goto sched_wq;
733 }
734
735 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
736 if (rc) {
737 nfc_dev_err(&dev->interface->dev,
738 "usb_submit_urb failed with result %d", rc);
739 cmd->status = rc;
740 goto sched_wq;
741 }
742
743 return;
744
745 sched_wq:
746 queue_work(dev->wq, &dev->cmd_complete_work);
747 }
748
749 static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
750 {
751 dev->in_urb->complete = pn533_recv_ack;
752
753 return usb_submit_urb(dev->in_urb, flags);
754 }
755
756 static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
757 {
758 u8 ack[PN533_STD_FRAME_ACK_SIZE] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
759 /* spec 7.1.1.3: Preamble, SoPC (2), ACK Code (2), Postamble */
760 int rc;
761
762 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
763
764 dev->out_urb->transfer_buffer = ack;
765 dev->out_urb->transfer_buffer_length = sizeof(ack);
766 rc = usb_submit_urb(dev->out_urb, flags);
767
768 return rc;
769 }
770
771 static int __pn533_send_frame_async(struct pn533 *dev,
772 struct sk_buff *out,
773 struct sk_buff *in,
774 int in_len)
775 {
776 int rc;
777
778 dev->out_urb->transfer_buffer = out->data;
779 dev->out_urb->transfer_buffer_length = out->len;
780
781 dev->in_urb->transfer_buffer = in->data;
782 dev->in_urb->transfer_buffer_length = in_len;
783
784 print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
785 out->data, out->len, false);
786
787 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
788 if (rc)
789 return rc;
790
791 if (dev->protocol_type == PN533_PROTO_REQ_RESP) {
792 /* request for response for sent packet directly */
793 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
794 if (rc)
795 goto error;
796 } else if (dev->protocol_type == PN533_PROTO_REQ_ACK_RESP) {
797 /* request for ACK if that's the case */
798 rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
799 if (rc)
800 goto error;
801 }
802
803 return 0;
804
805 error:
806 usb_unlink_urb(dev->out_urb);
807 return rc;
808 }
809
810 static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
811 struct sk_buff *skb)
812 {
813 /* payload is already there, just update datalen */
814 int payload_len = skb->len;
815 struct pn533_frame_ops *ops = dev->ops;
816
817
818 skb_push(skb, ops->tx_header_len);
819 skb_put(skb, ops->tx_tail_len);
820
821 ops->tx_frame_init(skb->data, cmd_code);
822 ops->tx_update_payload_len(skb->data, payload_len);
823 ops->tx_frame_finish(skb->data);
824 }
825
826 static int pn533_send_async_complete(struct pn533 *dev)
827 {
828 struct pn533_cmd *cmd = dev->cmd;
829 int status = cmd->status;
830
831 struct sk_buff *req = cmd->req;
832 struct sk_buff *resp = cmd->resp;
833
834 int rc;
835
836 dev_kfree_skb(req);
837
838 if (status < 0) {
839 rc = cmd->complete_cb(dev, cmd->complete_cb_context,
840 ERR_PTR(status));
841 dev_kfree_skb(resp);
842 goto done;
843 }
844
845 skb_put(resp, dev->ops->rx_frame_size(resp->data));
846 skb_pull(resp, dev->ops->rx_header_len);
847 skb_trim(resp, resp->len - dev->ops->rx_tail_len);
848
849 rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
850
851 done:
852 kfree(cmd);
853 dev->cmd = NULL;
854 return rc;
855 }
856
857 static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
858 struct sk_buff *req, struct sk_buff *resp,
859 int resp_len,
860 pn533_send_async_complete_t complete_cb,
861 void *complete_cb_context)
862 {
863 struct pn533_cmd *cmd;
864 int rc = 0;
865
866 nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x", cmd_code);
867
868 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
869 if (!cmd)
870 return -ENOMEM;
871
872 cmd->code = cmd_code;
873 cmd->req = req;
874 cmd->resp = resp;
875 cmd->resp_len = resp_len;
876 cmd->complete_cb = complete_cb;
877 cmd->complete_cb_context = complete_cb_context;
878
879 pn533_build_cmd_frame(dev, cmd_code, req);
880
881 mutex_lock(&dev->cmd_lock);
882
883 if (!dev->cmd_pending) {
884 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
885 if (rc)
886 goto error;
887
888 dev->cmd_pending = 1;
889 dev->cmd = cmd;
890 goto unlock;
891 }
892
893 nfc_dev_dbg(&dev->interface->dev, "%s Queueing command 0x%x", __func__,
894 cmd_code);
895
896 INIT_LIST_HEAD(&cmd->queue);
897 list_add_tail(&cmd->queue, &dev->cmd_queue);
898
899 goto unlock;
900
901 error:
902 kfree(cmd);
903 unlock:
904 mutex_unlock(&dev->cmd_lock);
905 return rc;
906 }
907
908 static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
909 struct sk_buff *req,
910 pn533_send_async_complete_t complete_cb,
911 void *complete_cb_context)
912 {
913 struct sk_buff *resp;
914 int rc;
915 int resp_len = dev->ops->rx_header_len +
916 dev->ops->max_payload_len +
917 dev->ops->rx_tail_len;
918
919 resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);
920 if (!resp)
921 return -ENOMEM;
922
923 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
924 complete_cb_context);
925 if (rc)
926 dev_kfree_skb(resp);
927
928 return rc;
929 }
930
931 static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
932 struct sk_buff *req,
933 pn533_send_async_complete_t complete_cb,
934 void *complete_cb_context)
935 {
936 struct sk_buff *resp;
937 int rc;
938 int resp_len = dev->ops->rx_header_len +
939 dev->ops->max_payload_len +
940 dev->ops->rx_tail_len;
941
942 resp = alloc_skb(resp_len, GFP_KERNEL);
943 if (!resp)
944 return -ENOMEM;
945
946 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
947 complete_cb_context);
948 if (rc)
949 dev_kfree_skb(resp);
950
951 return rc;
952 }
953
954 /*
955 * pn533_send_cmd_direct_async
956 *
957 * The function sends a piority cmd directly to the chip omiting the cmd
958 * queue. It's intended to be used by chaining mechanism of received responses
959 * where the host has to request every single chunk of data before scheduling
960 * next cmd from the queue.
961 */
962 static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
963 struct sk_buff *req,
964 pn533_send_async_complete_t complete_cb,
965 void *complete_cb_context)
966 {
967 struct sk_buff *resp;
968 struct pn533_cmd *cmd;
969 int rc;
970 int resp_len = dev->ops->rx_header_len +
971 dev->ops->max_payload_len +
972 dev->ops->rx_tail_len;
973
974 resp = alloc_skb(resp_len, GFP_KERNEL);
975 if (!resp)
976 return -ENOMEM;
977
978 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
979 if (!cmd) {
980 dev_kfree_skb(resp);
981 return -ENOMEM;
982 }
983
984 cmd->code = cmd_code;
985 cmd->req = req;
986 cmd->resp = resp;
987 cmd->resp_len = resp_len;
988 cmd->complete_cb = complete_cb;
989 cmd->complete_cb_context = complete_cb_context;
990
991 pn533_build_cmd_frame(dev, cmd_code, req);
992
993 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
994 if (rc < 0) {
995 dev_kfree_skb(resp);
996 kfree(cmd);
997 } else {
998 dev->cmd = cmd;
999 }
1000
1001 return rc;
1002 }
1003
1004 static void pn533_wq_cmd_complete(struct work_struct *work)
1005 {
1006 struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
1007 int rc;
1008
1009 rc = pn533_send_async_complete(dev);
1010 if (rc != -EINPROGRESS)
1011 queue_work(dev->wq, &dev->cmd_work);
1012 }
1013
1014 static void pn533_wq_cmd(struct work_struct *work)
1015 {
1016 struct pn533 *dev = container_of(work, struct pn533, cmd_work);
1017 struct pn533_cmd *cmd;
1018 int rc;
1019
1020 mutex_lock(&dev->cmd_lock);
1021
1022 if (list_empty(&dev->cmd_queue)) {
1023 dev->cmd_pending = 0;
1024 mutex_unlock(&dev->cmd_lock);
1025 return;
1026 }
1027
1028 cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
1029
1030 list_del(&cmd->queue);
1031
1032 mutex_unlock(&dev->cmd_lock);
1033
1034 rc = __pn533_send_frame_async(dev, cmd->req, cmd->resp, cmd->resp_len);
1035 if (rc < 0) {
1036 dev_kfree_skb(cmd->req);
1037 dev_kfree_skb(cmd->resp);
1038 kfree(cmd);
1039 return;
1040 }
1041
1042 dev->cmd = cmd;
1043 }
1044
1045 struct pn533_sync_cmd_response {
1046 struct sk_buff *resp;
1047 struct completion done;
1048 };
1049
1050 static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
1051 struct sk_buff *resp)
1052 {
1053 struct pn533_sync_cmd_response *arg = _arg;
1054
1055 arg->resp = resp;
1056 complete(&arg->done);
1057
1058 return 0;
1059 }
1060
1061 /* pn533_send_cmd_sync
1062 *
1063 * Please note the req parameter is freed inside the function to
1064 * limit a number of return value interpretations by the caller.
1065 *
1066 * 1. negative in case of error during TX path -> req should be freed
1067 *
1068 * 2. negative in case of error during RX path -> req should not be freed
1069 * as it's been already freed at the begining of RX path by
1070 * async_complete_cb.
1071 *
1072 * 3. valid pointer in case of succesfult RX path
1073 *
1074 * A caller has to check a return value with IS_ERR macro. If the test pass,
1075 * the returned pointer is valid.
1076 *
1077 * */
1078 static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
1079 struct sk_buff *req)
1080 {
1081 int rc;
1082 struct pn533_sync_cmd_response arg;
1083
1084 init_completion(&arg.done);
1085
1086 rc = pn533_send_cmd_async(dev, cmd_code, req,
1087 pn533_send_sync_complete, &arg);
1088 if (rc) {
1089 dev_kfree_skb(req);
1090 return ERR_PTR(rc);
1091 }
1092
1093 wait_for_completion(&arg.done);
1094
1095 return arg.resp;
1096 }
1097
1098 static void pn533_send_complete(struct urb *urb)
1099 {
1100 struct pn533 *dev = urb->context;
1101
1102 switch (urb->status) {
1103 case 0:
1104 break; /* success */
1105 case -ECONNRESET:
1106 case -ENOENT:
1107 nfc_dev_dbg(&dev->interface->dev,
1108 "The urb has been stopped (status %d)",
1109 urb->status);
1110 break;
1111 case -ESHUTDOWN:
1112 default:
1113 nfc_dev_err(&dev->interface->dev,
1114 "Urb failure (status %d)", urb->status);
1115 }
1116 }
1117
1118 static void pn533_abort_cmd(struct pn533 *dev, gfp_t flags)
1119 {
1120 /* ACR122U does not support any command which aborts last
1121 * issued command i.e. as ACK for standard PN533. Additionally,
1122 * it behaves stange, sending broken or incorrect responses,
1123 * when we cancel urb before the chip will send response.
1124 */
1125 if (dev->device_type == PN533_DEVICE_ACR122U)
1126 return;
1127
1128 /* An ack will cancel the last issued command */
1129 pn533_send_ack(dev, flags);
1130
1131 /* cancel the urb request */
1132 usb_kill_urb(dev->in_urb);
1133 }
1134
1135 static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
1136 {
1137 struct sk_buff *skb;
1138
1139 skb = alloc_skb(dev->ops->tx_header_len +
1140 size +
1141 dev->ops->tx_tail_len, GFP_KERNEL);
1142
1143 if (skb)
1144 skb_reserve(skb, dev->ops->tx_header_len);
1145
1146 return skb;
1147 }
1148
1149 struct pn533_target_type_a {
1150 __be16 sens_res;
1151 u8 sel_res;
1152 u8 nfcid_len;
1153 u8 nfcid_data[];
1154 } __packed;
1155
1156
1157 #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
1158 #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
1159 #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
1160
1161 #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
1162 #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
1163
1164 #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
1165 #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
1166
1167 #define PN533_TYPE_A_SEL_PROT_MIFARE 0
1168 #define PN533_TYPE_A_SEL_PROT_ISO14443 1
1169 #define PN533_TYPE_A_SEL_PROT_DEP 2
1170 #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
1171
1172 static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
1173 int target_data_len)
1174 {
1175 u8 ssd;
1176 u8 platconf;
1177
1178 if (target_data_len < sizeof(struct pn533_target_type_a))
1179 return false;
1180
1181 /* The lenght check of nfcid[] and ats[] are not being performed because
1182 the values are not being used */
1183
1184 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1185 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
1186 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
1187
1188 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1189 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1190 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1191 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1192 return false;
1193
1194 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
1195 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
1196 return false;
1197
1198 return true;
1199 }
1200
1201 static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
1202 int tgt_data_len)
1203 {
1204 struct pn533_target_type_a *tgt_type_a;
1205
1206 tgt_type_a = (struct pn533_target_type_a *)tgt_data;
1207
1208 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
1209 return -EPROTO;
1210
1211 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
1212 case PN533_TYPE_A_SEL_PROT_MIFARE:
1213 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
1214 break;
1215 case PN533_TYPE_A_SEL_PROT_ISO14443:
1216 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
1217 break;
1218 case PN533_TYPE_A_SEL_PROT_DEP:
1219 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1220 break;
1221 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
1222 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
1223 NFC_PROTO_NFC_DEP_MASK;
1224 break;
1225 }
1226
1227 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
1228 nfc_tgt->sel_res = tgt_type_a->sel_res;
1229 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
1230 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
1231
1232 return 0;
1233 }
1234
1235 struct pn533_target_felica {
1236 u8 pol_res;
1237 u8 opcode;
1238 u8 nfcid2[NFC_NFCID2_MAXSIZE];
1239 u8 pad[8];
1240 /* optional */
1241 u8 syst_code[];
1242 } __packed;
1243
1244 #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
1245 #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
1246
1247 static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
1248 int target_data_len)
1249 {
1250 if (target_data_len < sizeof(struct pn533_target_felica))
1251 return false;
1252
1253 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
1254 return false;
1255
1256 return true;
1257 }
1258
1259 static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
1260 int tgt_data_len)
1261 {
1262 struct pn533_target_felica *tgt_felica;
1263
1264 tgt_felica = (struct pn533_target_felica *)tgt_data;
1265
1266 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
1267 return -EPROTO;
1268
1269 if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
1270 (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
1271 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1272 else
1273 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
1274
1275 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
1276 nfc_tgt->sensf_res_len = 9;
1277
1278 memcpy(nfc_tgt->nfcid2, tgt_felica->nfcid2, NFC_NFCID2_MAXSIZE);
1279 nfc_tgt->nfcid2_len = NFC_NFCID2_MAXSIZE;
1280
1281 return 0;
1282 }
1283
1284 struct pn533_target_jewel {
1285 __be16 sens_res;
1286 u8 jewelid[4];
1287 } __packed;
1288
1289 static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
1290 int target_data_len)
1291 {
1292 u8 ssd;
1293 u8 platconf;
1294
1295 if (target_data_len < sizeof(struct pn533_target_jewel))
1296 return false;
1297
1298 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1299 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
1300 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
1301
1302 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1303 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1304 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1305 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1306 return false;
1307
1308 return true;
1309 }
1310
1311 static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
1312 int tgt_data_len)
1313 {
1314 struct pn533_target_jewel *tgt_jewel;
1315
1316 tgt_jewel = (struct pn533_target_jewel *)tgt_data;
1317
1318 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
1319 return -EPROTO;
1320
1321 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
1322 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
1323 nfc_tgt->nfcid1_len = 4;
1324 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
1325
1326 return 0;
1327 }
1328
1329 struct pn533_type_b_prot_info {
1330 u8 bitrate;
1331 u8 fsci_type;
1332 u8 fwi_adc_fo;
1333 } __packed;
1334
1335 #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1336 #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1337 #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1338
1339 struct pn533_type_b_sens_res {
1340 u8 opcode;
1341 u8 nfcid[4];
1342 u8 appdata[4];
1343 struct pn533_type_b_prot_info prot_info;
1344 } __packed;
1345
1346 #define PN533_TYPE_B_OPC_SENSB_RES 0x50
1347
1348 struct pn533_target_type_b {
1349 struct pn533_type_b_sens_res sensb_res;
1350 u8 attrib_res_len;
1351 u8 attrib_res[];
1352 } __packed;
1353
1354 static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1355 int target_data_len)
1356 {
1357 if (target_data_len < sizeof(struct pn533_target_type_b))
1358 return false;
1359
1360 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1361 return false;
1362
1363 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1364 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1365 return false;
1366
1367 return true;
1368 }
1369
1370 static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1371 int tgt_data_len)
1372 {
1373 struct pn533_target_type_b *tgt_type_b;
1374
1375 tgt_type_b = (struct pn533_target_type_b *)tgt_data;
1376
1377 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1378 return -EPROTO;
1379
1380 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
1381
1382 return 0;
1383 }
1384
1385 static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
1386 int tgdata_len)
1387 {
1388 struct nfc_target nfc_tgt;
1389 int rc;
1390
1391 nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
1392 dev->poll_mod_curr);
1393
1394 if (tg != 1)
1395 return -EPROTO;
1396
1397 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1398
1399 switch (dev->poll_mod_curr) {
1400 case PN533_POLL_MOD_106KBPS_A:
1401 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
1402 break;
1403 case PN533_POLL_MOD_212KBPS_FELICA:
1404 case PN533_POLL_MOD_424KBPS_FELICA:
1405 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
1406 break;
1407 case PN533_POLL_MOD_106KBPS_JEWEL:
1408 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
1409 break;
1410 case PN533_POLL_MOD_847KBPS_B:
1411 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
1412 break;
1413 default:
1414 nfc_dev_err(&dev->interface->dev,
1415 "Unknown current poll modulation");
1416 return -EPROTO;
1417 }
1418
1419 if (rc)
1420 return rc;
1421
1422 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
1423 nfc_dev_dbg(&dev->interface->dev,
1424 "The Tg found doesn't have the desired protocol");
1425 return -EAGAIN;
1426 }
1427
1428 nfc_dev_dbg(&dev->interface->dev,
1429 "Target found - supported protocols: 0x%x",
1430 nfc_tgt.supported_protocols);
1431
1432 dev->tgt_available_prots = nfc_tgt.supported_protocols;
1433
1434 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1435
1436 return 0;
1437 }
1438
1439 static inline void pn533_poll_next_mod(struct pn533 *dev)
1440 {
1441 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1442 }
1443
1444 static void pn533_poll_reset_mod_list(struct pn533 *dev)
1445 {
1446 dev->poll_mod_count = 0;
1447 }
1448
1449 static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1450 {
1451 dev->poll_mod_active[dev->poll_mod_count] =
1452 (struct pn533_poll_modulations *)&poll_mod[mod_index];
1453 dev->poll_mod_count++;
1454 }
1455
1456 static void pn533_poll_create_mod_list(struct pn533 *dev,
1457 u32 im_protocols, u32 tm_protocols)
1458 {
1459 pn533_poll_reset_mod_list(dev);
1460
1461 if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
1462 (im_protocols & NFC_PROTO_ISO14443_MASK) ||
1463 (im_protocols & NFC_PROTO_NFC_DEP_MASK))
1464 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1465
1466 if (im_protocols & NFC_PROTO_FELICA_MASK ||
1467 im_protocols & NFC_PROTO_NFC_DEP_MASK) {
1468 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1469 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1470 }
1471
1472 if (im_protocols & NFC_PROTO_JEWEL_MASK)
1473 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1474
1475 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
1476 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
1477
1478 if (tm_protocols)
1479 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
1480 }
1481
1482 static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
1483 {
1484 u8 nbtg, tg, *tgdata;
1485 int rc, tgdata_len;
1486
1487 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1488
1489 nbtg = resp->data[0];
1490 tg = resp->data[1];
1491 tgdata = &resp->data[2];
1492 tgdata_len = resp->len - 2; /* nbtg + tg */
1493
1494 if (nbtg) {
1495 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
1496
1497 /* We must stop the poll after a valid target found */
1498 if (rc == 0) {
1499 pn533_poll_reset_mod_list(dev);
1500 return 0;
1501 }
1502 }
1503
1504 return -EAGAIN;
1505 }
1506
1507 static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
1508 {
1509 struct sk_buff *skb;
1510 u8 *felica, *nfcid3, *gb;
1511
1512 u8 *gbytes = dev->gb;
1513 size_t gbytes_len = dev->gb_len;
1514
1515 u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1516 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1517 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1518 0xff, 0xff}; /* System code */
1519
1520 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1521 0x0, 0x0, 0x0,
1522 0x40}; /* SEL_RES for DEP */
1523
1524 unsigned int skb_len = 36 + /* mode (1), mifare (6),
1525 felica (18), nfcid3 (10), gb_len (1) */
1526 gbytes_len +
1527 1; /* len Tk*/
1528
1529 skb = pn533_alloc_skb(dev, skb_len);
1530 if (!skb)
1531 return NULL;
1532
1533 /* DEP support only */
1534 *skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
1535
1536 /* MIFARE params */
1537 memcpy(skb_put(skb, 6), mifare_params, 6);
1538
1539 /* Felica params */
1540 felica = skb_put(skb, 18);
1541 memcpy(felica, felica_params, 18);
1542 get_random_bytes(felica + 2, 6);
1543
1544 /* NFCID3 */
1545 nfcid3 = skb_put(skb, 10);
1546 memset(nfcid3, 0, 10);
1547 memcpy(nfcid3, felica, 8);
1548
1549 /* General bytes */
1550 *skb_put(skb, 1) = gbytes_len;
1551
1552 gb = skb_put(skb, gbytes_len);
1553 memcpy(gb, gbytes, gbytes_len);
1554
1555 /* Len Tk */
1556 *skb_put(skb, 1) = 0;
1557
1558 return skb;
1559 }
1560
1561 #define PN533_CMD_DATAEXCH_HEAD_LEN 1
1562 #define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1563 static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
1564 struct sk_buff *resp)
1565 {
1566 u8 status;
1567
1568 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1569
1570 if (IS_ERR(resp))
1571 return PTR_ERR(resp);
1572
1573 status = resp->data[0];
1574 skb_pull(resp, sizeof(status));
1575
1576 if (status != 0) {
1577 nfc_tm_deactivated(dev->nfc_dev);
1578 dev->tgt_mode = 0;
1579 dev_kfree_skb(resp);
1580 return 0;
1581 }
1582
1583 return nfc_tm_data_received(dev->nfc_dev, resp);
1584 }
1585
1586 static void pn533_wq_tg_get_data(struct work_struct *work)
1587 {
1588 struct pn533 *dev = container_of(work, struct pn533, tg_work);
1589
1590 struct sk_buff *skb;
1591 int rc;
1592
1593 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1594
1595 skb = pn533_alloc_skb(dev, 0);
1596 if (!skb)
1597 return;
1598
1599 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1600 pn533_tm_get_data_complete, NULL);
1601
1602 if (rc < 0)
1603 dev_kfree_skb(skb);
1604
1605 return;
1606 }
1607
1608 #define ATR_REQ_GB_OFFSET 17
1609 static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
1610 {
1611 u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
1612 size_t gb_len;
1613 int rc;
1614
1615 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1616
1617 if (resp->len < ATR_REQ_GB_OFFSET + 1)
1618 return -EINVAL;
1619
1620 mode = resp->data[0];
1621 cmd = &resp->data[1];
1622
1623 nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n",
1624 mode, resp->len);
1625
1626 if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1627 PN533_INIT_TARGET_RESP_ACTIVE)
1628 comm_mode = NFC_COMM_ACTIVE;
1629
1630 if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */
1631 return -EOPNOTSUPP;
1632
1633 gb = cmd + ATR_REQ_GB_OFFSET;
1634 gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
1635
1636 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1637 comm_mode, gb, gb_len);
1638 if (rc < 0) {
1639 nfc_dev_err(&dev->interface->dev,
1640 "Error when signaling target activation");
1641 return rc;
1642 }
1643
1644 dev->tgt_mode = 1;
1645 queue_work(dev->wq, &dev->tg_work);
1646
1647 return 0;
1648 }
1649
1650 static void pn533_listen_mode_timer(unsigned long data)
1651 {
1652 struct pn533 *dev = (struct pn533 *)data;
1653
1654 nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
1655
1656 dev->cancel_listen = 1;
1657
1658 pn533_poll_next_mod(dev);
1659
1660 queue_work(dev->wq, &dev->poll_work);
1661 }
1662
1663 static int pn533_poll_complete(struct pn533 *dev, void *arg,
1664 struct sk_buff *resp)
1665 {
1666 struct pn533_poll_modulations *cur_mod;
1667 int rc;
1668
1669 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1670
1671 if (IS_ERR(resp)) {
1672 rc = PTR_ERR(resp);
1673
1674 nfc_dev_err(&dev->interface->dev, "%s Poll complete error %d",
1675 __func__, rc);
1676
1677 if (rc == -ENOENT) {
1678 if (dev->poll_mod_count != 0)
1679 return rc;
1680 else
1681 goto stop_poll;
1682 } else if (rc < 0) {
1683 nfc_dev_err(&dev->interface->dev,
1684 "Error %d when running poll", rc);
1685 goto stop_poll;
1686 }
1687 }
1688
1689 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1690
1691 if (cur_mod->len == 0) { /* Target mode */
1692 del_timer(&dev->listen_timer);
1693 rc = pn533_init_target_complete(dev, resp);
1694 goto done;
1695 }
1696
1697 /* Initiator mode */
1698 rc = pn533_start_poll_complete(dev, resp);
1699 if (!rc)
1700 goto done;
1701
1702 if (!dev->poll_mod_count) {
1703 nfc_dev_dbg(&dev->interface->dev, "Polling has been stopped.");
1704 goto done;
1705 }
1706
1707 pn533_poll_next_mod(dev);
1708 queue_work(dev->wq, &dev->poll_work);
1709
1710 done:
1711 dev_kfree_skb(resp);
1712 return rc;
1713
1714 stop_poll:
1715 nfc_dev_err(&dev->interface->dev, "Polling operation has been stopped");
1716
1717 pn533_poll_reset_mod_list(dev);
1718 dev->poll_protocols = 0;
1719 return rc;
1720 }
1721
1722 static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1723 struct pn533_poll_modulations *mod)
1724 {
1725 struct sk_buff *skb;
1726
1727 skb = pn533_alloc_skb(dev, mod->len);
1728 if (!skb)
1729 return NULL;
1730
1731 memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
1732
1733 return skb;
1734 }
1735
1736 static int pn533_send_poll_frame(struct pn533 *dev)
1737 {
1738 struct pn533_poll_modulations *mod;
1739 struct sk_buff *skb;
1740 int rc;
1741 u8 cmd_code;
1742
1743 mod = dev->poll_mod_active[dev->poll_mod_curr];
1744
1745 nfc_dev_dbg(&dev->interface->dev, "%s mod len %d\n",
1746 __func__, mod->len);
1747
1748 if (mod->len == 0) { /* Listen mode */
1749 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
1750 skb = pn533_alloc_poll_tg_frame(dev);
1751 } else { /* Polling mode */
1752 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET;
1753 skb = pn533_alloc_poll_in_frame(dev, mod);
1754 }
1755
1756 if (!skb) {
1757 nfc_dev_err(&dev->interface->dev, "Failed to allocate skb.");
1758 return -ENOMEM;
1759 }
1760
1761 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1762 NULL);
1763 if (rc < 0) {
1764 dev_kfree_skb(skb);
1765 nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
1766 }
1767
1768 return rc;
1769 }
1770
1771 static void pn533_wq_poll(struct work_struct *work)
1772 {
1773 struct pn533 *dev = container_of(work, struct pn533, poll_work);
1774 struct pn533_poll_modulations *cur_mod;
1775 int rc;
1776
1777 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1778
1779 nfc_dev_dbg(&dev->interface->dev,
1780 "%s cancel_listen %d modulation len %d",
1781 __func__, dev->cancel_listen, cur_mod->len);
1782
1783 if (dev->cancel_listen == 1) {
1784 dev->cancel_listen = 0;
1785 pn533_abort_cmd(dev, GFP_ATOMIC);
1786 }
1787
1788 rc = pn533_send_poll_frame(dev);
1789 if (rc)
1790 return;
1791
1792 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1793 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1794
1795 return;
1796 }
1797
1798 static int pn533_start_poll(struct nfc_dev *nfc_dev,
1799 u32 im_protocols, u32 tm_protocols)
1800 {
1801 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1802
1803 nfc_dev_dbg(&dev->interface->dev,
1804 "%s: im protocols 0x%x tm protocols 0x%x",
1805 __func__, im_protocols, tm_protocols);
1806
1807 if (dev->tgt_active_prot) {
1808 nfc_dev_err(&dev->interface->dev,
1809 "Cannot poll with a target already activated");
1810 return -EBUSY;
1811 }
1812
1813 if (dev->tgt_mode) {
1814 nfc_dev_err(&dev->interface->dev,
1815 "Cannot poll while already being activated");
1816 return -EBUSY;
1817 }
1818
1819 if (tm_protocols) {
1820 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1821 if (dev->gb == NULL)
1822 tm_protocols = 0;
1823 }
1824
1825 dev->poll_mod_curr = 0;
1826 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1827 dev->poll_protocols = im_protocols;
1828 dev->listen_protocols = tm_protocols;
1829
1830 return pn533_send_poll_frame(dev);
1831 }
1832
1833 static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1834 {
1835 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1836
1837 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1838
1839 del_timer(&dev->listen_timer);
1840
1841 if (!dev->poll_mod_count) {
1842 nfc_dev_dbg(&dev->interface->dev,
1843 "Polling operation was not running");
1844 return;
1845 }
1846
1847 pn533_abort_cmd(dev, GFP_KERNEL);
1848 pn533_poll_reset_mod_list(dev);
1849 }
1850
1851 static int pn533_activate_target_nfcdep(struct pn533 *dev)
1852 {
1853 struct pn533_cmd_activate_response *rsp;
1854 u16 gt_len;
1855 int rc;
1856
1857 struct sk_buff *skb;
1858 struct sk_buff *resp;
1859
1860 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1861
1862 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
1863 if (!skb)
1864 return -ENOMEM;
1865
1866 *skb_put(skb, sizeof(u8)) = 1; /* TG */
1867 *skb_put(skb, sizeof(u8)) = 0; /* Next */
1868
1869 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1870 if (IS_ERR(resp))
1871 return PTR_ERR(resp);
1872
1873 rsp = (struct pn533_cmd_activate_response *)resp->data;
1874 rc = rsp->status & PN533_CMD_RET_MASK;
1875 if (rc != PN533_CMD_RET_SUCCESS) {
1876 nfc_dev_err(&dev->interface->dev,
1877 "Target activation failed (error 0x%x)", rc);
1878 dev_kfree_skb(resp);
1879 return -EIO;
1880 }
1881
1882 /* ATR_RES general bytes are located at offset 16 */
1883 gt_len = resp->len - 16;
1884 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
1885
1886 dev_kfree_skb(resp);
1887 return rc;
1888 }
1889
1890 static int pn533_activate_target(struct nfc_dev *nfc_dev,
1891 struct nfc_target *target, u32 protocol)
1892 {
1893 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1894 int rc;
1895
1896 nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
1897 protocol);
1898
1899 if (dev->poll_mod_count) {
1900 nfc_dev_err(&dev->interface->dev,
1901 "Cannot activate while polling");
1902 return -EBUSY;
1903 }
1904
1905 if (dev->tgt_active_prot) {
1906 nfc_dev_err(&dev->interface->dev,
1907 "There is already an active target");
1908 return -EBUSY;
1909 }
1910
1911 if (!dev->tgt_available_prots) {
1912 nfc_dev_err(&dev->interface->dev,
1913 "There is no available target to activate");
1914 return -EINVAL;
1915 }
1916
1917 if (!(dev->tgt_available_prots & (1 << protocol))) {
1918 nfc_dev_err(&dev->interface->dev,
1919 "Target doesn't support requested proto %u",
1920 protocol);
1921 return -EINVAL;
1922 }
1923
1924 if (protocol == NFC_PROTO_NFC_DEP) {
1925 rc = pn533_activate_target_nfcdep(dev);
1926 if (rc) {
1927 nfc_dev_err(&dev->interface->dev,
1928 "Activating target with DEP failed %d", rc);
1929 return rc;
1930 }
1931 }
1932
1933 dev->tgt_active_prot = protocol;
1934 dev->tgt_available_prots = 0;
1935
1936 return 0;
1937 }
1938
1939 static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1940 struct nfc_target *target)
1941 {
1942 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1943
1944 struct sk_buff *skb;
1945 struct sk_buff *resp;
1946
1947 int rc;
1948
1949 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1950
1951 if (!dev->tgt_active_prot) {
1952 nfc_dev_err(&dev->interface->dev, "There is no active target");
1953 return;
1954 }
1955
1956 dev->tgt_active_prot = 0;
1957 skb_queue_purge(&dev->resp_q);
1958
1959 skb = pn533_alloc_skb(dev, sizeof(u8));
1960 if (!skb)
1961 return;
1962
1963 *skb_put(skb, 1) = 1; /* TG*/
1964
1965 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
1966 if (IS_ERR(resp))
1967 return;
1968
1969 rc = resp->data[0] & PN533_CMD_RET_MASK;
1970 if (rc != PN533_CMD_RET_SUCCESS)
1971 nfc_dev_err(&dev->interface->dev,
1972 "Error 0x%x when releasing the target", rc);
1973
1974 dev_kfree_skb(resp);
1975 return;
1976 }
1977
1978
1979 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
1980 struct sk_buff *resp)
1981 {
1982 struct pn533_cmd_jump_dep_response *rsp;
1983 u8 target_gt_len;
1984 int rc;
1985 u8 active = *(u8 *)arg;
1986
1987 kfree(arg);
1988
1989 if (IS_ERR(resp))
1990 return PTR_ERR(resp);
1991
1992 if (dev->tgt_available_prots &&
1993 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1994 nfc_dev_err(&dev->interface->dev,
1995 "The target does not support DEP");
1996 rc = -EINVAL;
1997 goto error;
1998 }
1999
2000 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
2001
2002 rc = rsp->status & PN533_CMD_RET_MASK;
2003 if (rc != PN533_CMD_RET_SUCCESS) {
2004 nfc_dev_err(&dev->interface->dev,
2005 "Bringing DEP link up failed (error 0x%x)", rc);
2006 goto error;
2007 }
2008
2009 if (!dev->tgt_available_prots) {
2010 struct nfc_target nfc_target;
2011
2012 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
2013
2014 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2015 nfc_target.nfcid1_len = 10;
2016 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
2017 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
2018 if (rc)
2019 goto error;
2020
2021 dev->tgt_available_prots = 0;
2022 }
2023
2024 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
2025
2026 /* ATR_RES general bytes are located at offset 17 */
2027 target_gt_len = resp->len - 17;
2028 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
2029 rsp->gt, target_gt_len);
2030 if (rc == 0)
2031 rc = nfc_dep_link_is_up(dev->nfc_dev,
2032 dev->nfc_dev->targets[0].idx,
2033 !active, NFC_RF_INITIATOR);
2034
2035 error:
2036 dev_kfree_skb(resp);
2037 return rc;
2038 }
2039
2040 static int pn533_mod_to_baud(struct pn533 *dev)
2041 {
2042 switch (dev->poll_mod_curr) {
2043 case PN533_POLL_MOD_106KBPS_A:
2044 return 0;
2045 case PN533_POLL_MOD_212KBPS_FELICA:
2046 return 1;
2047 case PN533_POLL_MOD_424KBPS_FELICA:
2048 return 2;
2049 default:
2050 return -EINVAL;
2051 }
2052 }
2053
2054 #define PASSIVE_DATA_LEN 5
2055 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
2056 u8 comm_mode, u8 *gb, size_t gb_len)
2057 {
2058 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2059 struct sk_buff *skb;
2060 int rc, baud, skb_len;
2061 u8 *next, *arg;
2062
2063 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
2064
2065 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2066
2067 if (dev->poll_mod_count) {
2068 nfc_dev_err(&dev->interface->dev,
2069 "Cannot bring the DEP link up while polling");
2070 return -EBUSY;
2071 }
2072
2073 if (dev->tgt_active_prot) {
2074 nfc_dev_err(&dev->interface->dev,
2075 "There is already an active target");
2076 return -EBUSY;
2077 }
2078
2079 baud = pn533_mod_to_baud(dev);
2080 if (baud < 0) {
2081 nfc_dev_err(&dev->interface->dev,
2082 "Invalid curr modulation %d", dev->poll_mod_curr);
2083 return baud;
2084 }
2085
2086 skb_len = 3 + gb_len; /* ActPass + BR + Next */
2087 if (comm_mode == NFC_COMM_PASSIVE)
2088 skb_len += PASSIVE_DATA_LEN;
2089
2090 if (target && target->nfcid2_len)
2091 skb_len += NFC_NFCID3_MAXSIZE;
2092
2093 skb = pn533_alloc_skb(dev, skb_len);
2094 if (!skb)
2095 return -ENOMEM;
2096
2097 *skb_put(skb, 1) = !comm_mode; /* ActPass */
2098 *skb_put(skb, 1) = baud; /* Baud rate */
2099
2100 next = skb_put(skb, 1); /* Next */
2101 *next = 0;
2102
2103 if (comm_mode == NFC_COMM_PASSIVE && baud > 0) {
2104 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data,
2105 PASSIVE_DATA_LEN);
2106 *next |= 1;
2107 }
2108
2109 if (target && target->nfcid2_len) {
2110 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2,
2111 target->nfcid2_len);
2112 *next |= 2;
2113 }
2114
2115 if (gb != NULL && gb_len > 0) {
2116 memcpy(skb_put(skb, gb_len), gb, gb_len);
2117 *next |= 4; /* We have some Gi */
2118 } else {
2119 *next = 0;
2120 }
2121
2122 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2123 if (!arg) {
2124 dev_kfree_skb(skb);
2125 return -ENOMEM;
2126 }
2127
2128 *arg = !comm_mode;
2129
2130 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
2131 pn533_in_dep_link_up_complete, arg);
2132
2133 if (rc < 0) {
2134 dev_kfree_skb(skb);
2135 kfree(arg);
2136 }
2137
2138 return rc;
2139 }
2140
2141 static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
2142 {
2143 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2144
2145 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2146
2147 pn533_poll_reset_mod_list(dev);
2148
2149 if (dev->tgt_mode || dev->tgt_active_prot)
2150 pn533_abort_cmd(dev, GFP_KERNEL);
2151
2152 dev->tgt_active_prot = 0;
2153 dev->tgt_mode = 0;
2154
2155 skb_queue_purge(&dev->resp_q);
2156
2157 return 0;
2158 }
2159
2160 struct pn533_data_exchange_arg {
2161 data_exchange_cb_t cb;
2162 void *cb_context;
2163 };
2164
2165 static struct sk_buff *pn533_build_response(struct pn533 *dev)
2166 {
2167 struct sk_buff *skb, *tmp, *t;
2168 unsigned int skb_len = 0, tmp_len = 0;
2169
2170 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2171
2172 if (skb_queue_empty(&dev->resp_q))
2173 return NULL;
2174
2175 if (skb_queue_len(&dev->resp_q) == 1) {
2176 skb = skb_dequeue(&dev->resp_q);
2177 goto out;
2178 }
2179
2180 skb_queue_walk_safe(&dev->resp_q, tmp, t)
2181 skb_len += tmp->len;
2182
2183 nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
2184 __func__, skb_len);
2185
2186 skb = alloc_skb(skb_len, GFP_KERNEL);
2187 if (skb == NULL)
2188 goto out;
2189
2190 skb_put(skb, skb_len);
2191
2192 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2193 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2194 tmp_len += tmp->len;
2195 }
2196
2197 out:
2198 skb_queue_purge(&dev->resp_q);
2199
2200 return skb;
2201 }
2202
2203 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
2204 struct sk_buff *resp)
2205 {
2206 struct pn533_data_exchange_arg *arg = _arg;
2207 struct sk_buff *skb;
2208 int rc = 0;
2209 u8 status, ret, mi;
2210
2211 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2212
2213 if (IS_ERR(resp)) {
2214 rc = PTR_ERR(resp);
2215 goto _error;
2216 }
2217
2218 status = resp->data[0];
2219 ret = status & PN533_CMD_RET_MASK;
2220 mi = status & PN533_CMD_MI_MASK;
2221
2222 skb_pull(resp, sizeof(status));
2223
2224 if (ret != PN533_CMD_RET_SUCCESS) {
2225 nfc_dev_err(&dev->interface->dev,
2226 "Exchanging data failed (error 0x%x)", ret);
2227 rc = -EIO;
2228 goto error;
2229 }
2230
2231 skb_queue_tail(&dev->resp_q, resp);
2232
2233 if (mi) {
2234 dev->cmd_complete_mi_arg = arg;
2235 queue_work(dev->wq, &dev->mi_work);
2236 return -EINPROGRESS;
2237 }
2238
2239 skb = pn533_build_response(dev);
2240 if (!skb)
2241 goto error;
2242
2243 arg->cb(arg->cb_context, skb, 0);
2244 kfree(arg);
2245 return 0;
2246
2247 error:
2248 dev_kfree_skb(resp);
2249 _error:
2250 skb_queue_purge(&dev->resp_q);
2251 arg->cb(arg->cb_context, NULL, rc);
2252 kfree(arg);
2253 return rc;
2254 }
2255
2256 static int pn533_transceive(struct nfc_dev *nfc_dev,
2257 struct nfc_target *target, struct sk_buff *skb,
2258 data_exchange_cb_t cb, void *cb_context)
2259 {
2260 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2261 struct pn533_data_exchange_arg *arg = NULL;
2262 int rc;
2263
2264 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2265
2266 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2267 /* TODO: Implement support to multi-part data exchange */
2268 nfc_dev_err(&dev->interface->dev,
2269 "Data length greater than the max allowed: %d",
2270 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2271 rc = -ENOSYS;
2272 goto error;
2273 }
2274
2275 if (!dev->tgt_active_prot) {
2276 nfc_dev_err(&dev->interface->dev,
2277 "Can't exchange data if there is no active target");
2278 rc = -EINVAL;
2279 goto error;
2280 }
2281
2282 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2283 if (!arg) {
2284 rc = -ENOMEM;
2285 goto error;
2286 }
2287
2288 arg->cb = cb;
2289 arg->cb_context = cb_context;
2290
2291 switch (dev->device_type) {
2292 case PN533_DEVICE_PASORI:
2293 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2294 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2295 skb,
2296 pn533_data_exchange_complete,
2297 arg);
2298
2299 break;
2300 }
2301 default:
2302 *skb_push(skb, sizeof(u8)) = 1; /*TG*/
2303
2304 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2305 skb, pn533_data_exchange_complete,
2306 arg);
2307
2308 break;
2309 }
2310
2311 if (rc < 0) /* rc from send_async */
2312 goto error;
2313
2314 return 0;
2315
2316 error:
2317 kfree(arg);
2318 dev_kfree_skb(skb);
2319 return rc;
2320 }
2321
2322 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
2323 struct sk_buff *resp)
2324 {
2325 u8 status;
2326
2327 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2328
2329 if (IS_ERR(resp))
2330 return PTR_ERR(resp);
2331
2332 status = resp->data[0];
2333
2334 dev_kfree_skb(resp);
2335
2336 if (status != 0) {
2337 nfc_tm_deactivated(dev->nfc_dev);
2338
2339 dev->tgt_mode = 0;
2340
2341 return 0;
2342 }
2343
2344 queue_work(dev->wq, &dev->tg_work);
2345
2346 return 0;
2347 }
2348
2349 static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2350 {
2351 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2352 int rc;
2353
2354 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2355
2356 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2357 nfc_dev_err(&dev->interface->dev,
2358 "Data length greater than the max allowed: %d",
2359 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2360 return -ENOSYS;
2361 }
2362
2363 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2364 pn533_tm_send_complete, NULL);
2365 if (rc < 0)
2366 dev_kfree_skb(skb);
2367
2368 return rc;
2369 }
2370
2371 static void pn533_wq_mi_recv(struct work_struct *work)
2372 {
2373 struct pn533 *dev = container_of(work, struct pn533, mi_work);
2374
2375 struct sk_buff *skb;
2376 int rc;
2377
2378 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2379
2380 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
2381 if (!skb)
2382 goto error;
2383
2384 switch (dev->device_type) {
2385 case PN533_DEVICE_PASORI:
2386 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2387 rc = pn533_send_cmd_direct_async(dev,
2388 PN533_CMD_IN_COMM_THRU,
2389 skb,
2390 pn533_data_exchange_complete,
2391 dev->cmd_complete_mi_arg);
2392
2393 break;
2394 }
2395 default:
2396 *skb_put(skb, sizeof(u8)) = 1; /*TG*/
2397
2398 rc = pn533_send_cmd_direct_async(dev,
2399 PN533_CMD_IN_DATA_EXCHANGE,
2400 skb,
2401 pn533_data_exchange_complete,
2402 dev->cmd_complete_mi_arg);
2403
2404 break;
2405 }
2406
2407 if (rc == 0) /* success */
2408 return;
2409
2410 nfc_dev_err(&dev->interface->dev,
2411 "Error %d when trying to perform data_exchange", rc);
2412
2413 dev_kfree_skb(skb);
2414 kfree(dev->cmd_complete_mi_arg);
2415
2416 error:
2417 pn533_send_ack(dev, GFP_KERNEL);
2418 queue_work(dev->wq, &dev->cmd_work);
2419 }
2420
2421 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2422 u8 cfgdata_len)
2423 {
2424 struct sk_buff *skb;
2425 struct sk_buff *resp;
2426
2427 int skb_len;
2428
2429 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2430
2431 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
2432
2433 skb = pn533_alloc_skb(dev, skb_len);
2434 if (!skb)
2435 return -ENOMEM;
2436
2437 *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2438 memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
2439
2440 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2441 if (IS_ERR(resp))
2442 return PTR_ERR(resp);
2443
2444 dev_kfree_skb(resp);
2445 return 0;
2446 }
2447
2448 static int pn533_get_firmware_version(struct pn533 *dev,
2449 struct pn533_fw_version *fv)
2450 {
2451 struct sk_buff *skb;
2452 struct sk_buff *resp;
2453
2454 skb = pn533_alloc_skb(dev, 0);
2455 if (!skb)
2456 return -ENOMEM;
2457
2458 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2459 if (IS_ERR(resp))
2460 return PTR_ERR(resp);
2461
2462 fv->ic = resp->data[0];
2463 fv->ver = resp->data[1];
2464 fv->rev = resp->data[2];
2465 fv->support = resp->data[3];
2466
2467 dev_kfree_skb(resp);
2468 return 0;
2469 }
2470
2471 static int pn533_pasori_fw_reset(struct pn533 *dev)
2472 {
2473 struct sk_buff *skb;
2474 struct sk_buff *resp;
2475
2476 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2477
2478 skb = pn533_alloc_skb(dev, sizeof(u8));
2479 if (!skb)
2480 return -ENOMEM;
2481
2482 *skb_put(skb, sizeof(u8)) = 0x1;
2483
2484 resp = pn533_send_cmd_sync(dev, 0x18, skb);
2485 if (IS_ERR(resp))
2486 return PTR_ERR(resp);
2487
2488 dev_kfree_skb(resp);
2489
2490 return 0;
2491 }
2492
2493 struct pn533_acr122_poweron_rdr_arg {
2494 int rc;
2495 struct completion done;
2496 };
2497
2498 static void pn533_acr122_poweron_rdr_resp(struct urb *urb)
2499 {
2500 struct pn533_acr122_poweron_rdr_arg *arg = urb->context;
2501
2502 nfc_dev_dbg(&urb->dev->dev, "%s", __func__);
2503
2504 print_hex_dump_debug("ACR122 RX: ", DUMP_PREFIX_NONE, 16, 1,
2505 urb->transfer_buffer, urb->transfer_buffer_length,
2506 false);
2507
2508 arg->rc = urb->status;
2509 complete(&arg->done);
2510 }
2511
2512 static int pn533_acr122_poweron_rdr(struct pn533 *dev)
2513 {
2514 /* Power on th reader (CCID cmd) */
2515 u8 cmd[10] = {PN533_ACR122_PC_TO_RDR_ICCPOWERON,
2516 0, 0, 0, 0, 0, 0, 3, 0, 0};
2517 u8 buf[255];
2518 int rc;
2519 void *cntx;
2520 struct pn533_acr122_poweron_rdr_arg arg;
2521
2522 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2523
2524 init_completion(&arg.done);
2525 cntx = dev->in_urb->context; /* backup context */
2526
2527 dev->in_urb->transfer_buffer = buf;
2528 dev->in_urb->transfer_buffer_length = 255;
2529 dev->in_urb->complete = pn533_acr122_poweron_rdr_resp;
2530 dev->in_urb->context = &arg;
2531
2532 dev->out_urb->transfer_buffer = cmd;
2533 dev->out_urb->transfer_buffer_length = sizeof(cmd);
2534
2535 print_hex_dump_debug("ACR122 TX: ", DUMP_PREFIX_NONE, 16, 1,
2536 cmd, sizeof(cmd), false);
2537
2538 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
2539 if (rc) {
2540 nfc_dev_err(&dev->interface->dev,
2541 "Reader power on cmd error %d", rc);
2542 return rc;
2543 }
2544
2545 rc = usb_submit_urb(dev->in_urb, GFP_KERNEL);
2546 if (rc) {
2547 nfc_dev_err(&dev->interface->dev,
2548 "Can't submit for reader power on cmd response %d",
2549 rc);
2550 return rc;
2551 }
2552
2553 wait_for_completion(&arg.done);
2554 dev->in_urb->context = cntx; /* restore context */
2555
2556 return arg.rc;
2557 }
2558
2559 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
2560 {
2561 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2562 u8 rf_field = !!rf;
2563 int rc;
2564
2565 rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
2566 (u8 *)&rf_field, 1);
2567 if (rc) {
2568 nfc_dev_err(&dev->interface->dev,
2569 "Error on setting RF field");
2570 return rc;
2571 }
2572
2573 return rc;
2574 }
2575
2576 int pn533_dev_up(struct nfc_dev *nfc_dev)
2577 {
2578 return pn533_rf_field(nfc_dev, 1);
2579 }
2580
2581 int pn533_dev_down(struct nfc_dev *nfc_dev)
2582 {
2583 return pn533_rf_field(nfc_dev, 0);
2584 }
2585
2586 static struct nfc_ops pn533_nfc_ops = {
2587 .dev_up = pn533_dev_up,
2588 .dev_down = pn533_dev_down,
2589 .dep_link_up = pn533_dep_link_up,
2590 .dep_link_down = pn533_dep_link_down,
2591 .start_poll = pn533_start_poll,
2592 .stop_poll = pn533_stop_poll,
2593 .activate_target = pn533_activate_target,
2594 .deactivate_target = pn533_deactivate_target,
2595 .im_transceive = pn533_transceive,
2596 .tm_send = pn533_tm_send,
2597 };
2598
2599 static int pn533_setup(struct pn533 *dev)
2600 {
2601 struct pn533_config_max_retries max_retries;
2602 struct pn533_config_timing timing;
2603 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2604 int rc;
2605
2606 switch (dev->device_type) {
2607 case PN533_DEVICE_STD:
2608 max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
2609 max_retries.mx_rty_psl = 2;
2610 max_retries.mx_rty_passive_act =
2611 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2612
2613 timing.rfu = PN533_CONFIG_TIMING_102;
2614 timing.atr_res_timeout = PN533_CONFIG_TIMING_204;
2615 timing.dep_timeout = PN533_CONFIG_TIMING_409;
2616
2617 break;
2618
2619 case PN533_DEVICE_PASORI:
2620 case PN533_DEVICE_ACR122U:
2621 max_retries.mx_rty_atr = 0x2;
2622 max_retries.mx_rty_psl = 0x1;
2623 max_retries.mx_rty_passive_act =
2624 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2625
2626 timing.rfu = PN533_CONFIG_TIMING_102;
2627 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2628 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2629
2630 break;
2631
2632 default:
2633 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2634 dev->device_type);
2635 return -EINVAL;
2636 }
2637
2638 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2639 (u8 *)&max_retries, sizeof(max_retries));
2640 if (rc) {
2641 nfc_dev_err(&dev->interface->dev,
2642 "Error on setting MAX_RETRIES config");
2643 return rc;
2644 }
2645
2646
2647 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2648 (u8 *)&timing, sizeof(timing));
2649 if (rc) {
2650 nfc_dev_err(&dev->interface->dev,
2651 "Error on setting RF timings");
2652 return rc;
2653 }
2654
2655 switch (dev->device_type) {
2656 case PN533_DEVICE_STD:
2657 break;
2658
2659 case PN533_DEVICE_PASORI:
2660 pn533_pasori_fw_reset(dev);
2661
2662 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2663 pasori_cfg, 3);
2664 if (rc) {
2665 nfc_dev_err(&dev->interface->dev,
2666 "Error while settings PASORI config");
2667 return rc;
2668 }
2669
2670 pn533_pasori_fw_reset(dev);
2671
2672 break;
2673 }
2674
2675 return 0;
2676 }
2677
2678 static int pn533_probe(struct usb_interface *interface,
2679 const struct usb_device_id *id)
2680 {
2681 struct pn533_fw_version fw_ver;
2682 struct pn533 *dev;
2683 struct usb_host_interface *iface_desc;
2684 struct usb_endpoint_descriptor *endpoint;
2685 int in_endpoint = 0;
2686 int out_endpoint = 0;
2687 int rc = -ENOMEM;
2688 int i;
2689 u32 protocols;
2690
2691 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2692 if (!dev)
2693 return -ENOMEM;
2694
2695 dev->udev = usb_get_dev(interface_to_usbdev(interface));
2696 dev->interface = interface;
2697 mutex_init(&dev->cmd_lock);
2698
2699 iface_desc = interface->cur_altsetting;
2700 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2701 endpoint = &iface_desc->endpoint[i].desc;
2702
2703 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
2704 in_endpoint = endpoint->bEndpointAddress;
2705
2706 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
2707 out_endpoint = endpoint->bEndpointAddress;
2708 }
2709
2710 if (!in_endpoint || !out_endpoint) {
2711 nfc_dev_err(&interface->dev,
2712 "Could not find bulk-in or bulk-out endpoint");
2713 rc = -ENODEV;
2714 goto error;
2715 }
2716
2717 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
2718 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
2719
2720 if (!dev->in_urb || !dev->out_urb)
2721 goto error;
2722
2723 usb_fill_bulk_urb(dev->in_urb, dev->udev,
2724 usb_rcvbulkpipe(dev->udev, in_endpoint),
2725 NULL, 0, NULL, dev);
2726 usb_fill_bulk_urb(dev->out_urb, dev->udev,
2727 usb_sndbulkpipe(dev->udev, out_endpoint),
2728 NULL, 0, pn533_send_complete, dev);
2729
2730 INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
2731 INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
2732 INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
2733 INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
2734 INIT_WORK(&dev->poll_work, pn533_wq_poll);
2735 dev->wq = alloc_ordered_workqueue("pn533", 0);
2736 if (dev->wq == NULL)
2737 goto error;
2738
2739 init_timer(&dev->listen_timer);
2740 dev->listen_timer.data = (unsigned long) dev;
2741 dev->listen_timer.function = pn533_listen_mode_timer;
2742
2743 skb_queue_head_init(&dev->resp_q);
2744
2745 INIT_LIST_HEAD(&dev->cmd_queue);
2746
2747 usb_set_intfdata(interface, dev);
2748
2749 dev->ops = &pn533_std_frame_ops;
2750
2751 dev->protocol_type = PN533_PROTO_REQ_ACK_RESP;
2752 dev->device_type = id->driver_info;
2753 switch (dev->device_type) {
2754 case PN533_DEVICE_STD:
2755 protocols = PN533_ALL_PROTOCOLS;
2756 break;
2757
2758 case PN533_DEVICE_PASORI:
2759 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2760 break;
2761
2762 case PN533_DEVICE_ACR122U:
2763 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2764 dev->ops = &pn533_acr122_frame_ops;
2765 dev->protocol_type = PN533_PROTO_REQ_RESP,
2766
2767 rc = pn533_acr122_poweron_rdr(dev);
2768 if (rc < 0) {
2769 nfc_dev_err(&dev->interface->dev,
2770 "Couldn't poweron the reader (error %d)",
2771 rc);
2772 goto destroy_wq;
2773 }
2774 break;
2775
2776 default:
2777 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2778 dev->device_type);
2779 rc = -EINVAL;
2780 goto destroy_wq;
2781 }
2782
2783 memset(&fw_ver, 0, sizeof(fw_ver));
2784 rc = pn533_get_firmware_version(dev, &fw_ver);
2785 if (rc < 0)
2786 goto destroy_wq;
2787
2788 nfc_dev_info(&dev->interface->dev,
2789 "NXP PN5%02X firmware ver %d.%d now attached",
2790 fw_ver.ic, fw_ver.ver, fw_ver.rev);
2791
2792
2793 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
2794 dev->ops->tx_header_len +
2795 PN533_CMD_DATAEXCH_HEAD_LEN,
2796 dev->ops->tx_tail_len);
2797 if (!dev->nfc_dev) {
2798 rc = -ENOMEM;
2799 goto destroy_wq;
2800 }
2801
2802 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
2803 nfc_set_drvdata(dev->nfc_dev, dev);
2804
2805 rc = nfc_register_device(dev->nfc_dev);
2806 if (rc)
2807 goto free_nfc_dev;
2808
2809 rc = pn533_setup(dev);
2810 if (rc)
2811 goto unregister_nfc_dev;
2812
2813 return 0;
2814
2815 unregister_nfc_dev:
2816 nfc_unregister_device(dev->nfc_dev);
2817
2818 free_nfc_dev:
2819 nfc_free_device(dev->nfc_dev);
2820
2821 destroy_wq:
2822 destroy_workqueue(dev->wq);
2823 error:
2824 usb_free_urb(dev->in_urb);
2825 usb_free_urb(dev->out_urb);
2826 usb_put_dev(dev->udev);
2827 kfree(dev);
2828 return rc;
2829 }
2830
2831 static void pn533_disconnect(struct usb_interface *interface)
2832 {
2833 struct pn533 *dev;
2834 struct pn533_cmd *cmd, *n;
2835
2836 dev = usb_get_intfdata(interface);
2837 usb_set_intfdata(interface, NULL);
2838
2839 nfc_unregister_device(dev->nfc_dev);
2840 nfc_free_device(dev->nfc_dev);
2841
2842 usb_kill_urb(dev->in_urb);
2843 usb_kill_urb(dev->out_urb);
2844
2845 destroy_workqueue(dev->wq);
2846
2847 skb_queue_purge(&dev->resp_q);
2848
2849 del_timer(&dev->listen_timer);
2850
2851 list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
2852 list_del(&cmd->queue);
2853 kfree(cmd);
2854 }
2855
2856 usb_free_urb(dev->in_urb);
2857 usb_free_urb(dev->out_urb);
2858 kfree(dev);
2859
2860 nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
2861 }
2862
2863 static struct usb_driver pn533_driver = {
2864 .name = "pn533",
2865 .probe = pn533_probe,
2866 .disconnect = pn533_disconnect,
2867 .id_table = pn533_table,
2868 };
2869
2870 module_usb_driver(pn533_driver);
2871
2872 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
2873 MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2874 MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
2875 MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
2876 MODULE_VERSION(VERSION);
2877 MODULE_LICENSE("GPL");
Linus' kernel tree