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1 | /* |
2 | * Copyright (C) 2011 Instituto Nokia de Tecnologia |
3 | * |
4 | * Authors: |
5 | * Lauro Ramos Venancio <lauro.venancio@openbossa.org> |
6 | * Aloisio Almeida Jr <aloisio.almeida@openbossa.org> |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify |
9 | * it under the terms of the GNU General Public License as published by |
10 | * the Free Software Foundation; either version 2 of the License, or |
11 | * (at your option) any later version. |
12 | * |
13 | * This program is distributed in the hope that it will be useful, |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 | * GNU General Public License for more details. |
17 | * |
18 | * You should have received a copy of the GNU General Public License |
19 | * along with this program; if not, write to the |
20 | * Free Software Foundation, Inc., |
21 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
22 | */ |
23 | |
24 | #include <linux/device.h> |
25 | #include <linux/kernel.h> |
26 | #include <linux/module.h> |
27 | #include <linux/slab.h> |
28 | #include <linux/usb.h> |
29 | #include <linux/nfc.h> |
30 | #include <linux/netdevice.h> |
31 | #include <net/nfc/nfc.h> |
32 | |
33 | #define VERSION "0.1" |
34 | |
35 | #define PN533_VENDOR_ID 0x4CC |
36 | #define PN533_PRODUCT_ID 0x2533 |
37 | |
38 | #define SCM_VENDOR_ID 0x4E6 |
39 | #define SCL3711_PRODUCT_ID 0x5591 |
40 | |
41 | #define SONY_VENDOR_ID 0x054c |
42 | #define PASORI_PRODUCT_ID 0x02e1 |
43 | |
44 | #define PN533_DEVICE_STD 0x1 |
45 | #define PN533_DEVICE_PASORI 0x2 |
46 | |
47 | #define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\ |
48 | NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\ |
49 | NFC_PROTO_NFC_DEP_MASK |\ |
50 | NFC_PROTO_ISO14443_B_MASK) |
51 | |
52 | #define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \ |
53 | NFC_PROTO_MIFARE_MASK | \ |
54 | NFC_PROTO_FELICA_MASK | \ |
55 | NFC_PROTO_ISO14443_MASK | \ |
56 | NFC_PROTO_NFC_DEP_MASK) |
57 | |
58 | static const struct usb_device_id pn533_table[] = { |
59 | { .match_flags = USB_DEVICE_ID_MATCH_DEVICE, |
60 | .idVendor = PN533_VENDOR_ID, |
61 | .idProduct = PN533_PRODUCT_ID, |
62 | .driver_info = PN533_DEVICE_STD, |
63 | }, |
64 | { .match_flags = USB_DEVICE_ID_MATCH_DEVICE, |
65 | .idVendor = SCM_VENDOR_ID, |
66 | .idProduct = SCL3711_PRODUCT_ID, |
67 | .driver_info = PN533_DEVICE_STD, |
68 | }, |
69 | { .match_flags = USB_DEVICE_ID_MATCH_DEVICE, |
70 | .idVendor = SONY_VENDOR_ID, |
71 | .idProduct = PASORI_PRODUCT_ID, |
72 | .driver_info = PN533_DEVICE_PASORI, |
73 | }, |
74 | { } |
75 | }; |
76 | MODULE_DEVICE_TABLE(usb, pn533_table); |
77 | |
78 | /* How much time we spend listening for initiators */ |
79 | #define PN533_LISTEN_TIME 2 |
80 | |
81 | /* frame definitions */ |
82 | #define PN533_FRAME_HEADER_LEN (sizeof(struct pn533_frame) \ |
83 | + 2) /* data[0] TFI, data[1] CC */ |
84 | #define PN533_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/ |
85 | |
86 | /* |
87 | * Max extended frame payload len, excluding TFI and CC |
88 | * which are already in PN533_FRAME_HEADER_LEN. |
89 | */ |
90 | #define PN533_FRAME_MAX_PAYLOAD_LEN 263 |
91 | |
92 | #define PN533_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2), |
93 | Postamble (1) */ |
94 | #define PN533_FRAME_CHECKSUM(f) (f->data[f->datalen]) |
95 | #define PN533_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1]) |
96 | |
97 | /* start of frame */ |
98 | #define PN533_SOF 0x00FF |
99 | |
100 | /* frame identifier: in/out/error */ |
101 | #define PN533_FRAME_IDENTIFIER(f) (f->data[0]) |
102 | #define PN533_DIR_OUT 0xD4 |
103 | #define PN533_DIR_IN 0xD5 |
104 | |
105 | /* PN533 Commands */ |
106 | #define PN533_FRAME_CMD(f) (f->data[1]) |
107 | |
108 | #define PN533_CMD_GET_FIRMWARE_VERSION 0x02 |
109 | #define PN533_CMD_RF_CONFIGURATION 0x32 |
110 | #define PN533_CMD_IN_DATA_EXCHANGE 0x40 |
111 | #define PN533_CMD_IN_COMM_THRU 0x42 |
112 | #define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A |
113 | #define PN533_CMD_IN_ATR 0x50 |
114 | #define PN533_CMD_IN_RELEASE 0x52 |
115 | #define PN533_CMD_IN_JUMP_FOR_DEP 0x56 |
116 | |
117 | #define PN533_CMD_TG_INIT_AS_TARGET 0x8c |
118 | #define PN533_CMD_TG_GET_DATA 0x86 |
119 | #define PN533_CMD_TG_SET_DATA 0x8e |
120 | #define PN533_CMD_UNDEF 0xff |
121 | |
122 | #define PN533_CMD_RESPONSE(cmd) (cmd + 1) |
123 | |
124 | /* PN533 Return codes */ |
125 | #define PN533_CMD_RET_MASK 0x3F |
126 | #define PN533_CMD_MI_MASK 0x40 |
127 | #define PN533_CMD_RET_SUCCESS 0x00 |
128 | |
129 | struct pn533; |
130 | |
131 | typedef int (*pn533_cmd_complete_t) (struct pn533 *dev, void *arg, int status); |
132 | |
133 | typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg, |
134 | struct sk_buff *resp); |
135 | |
136 | /* structs for pn533 commands */ |
137 | |
138 | /* PN533_CMD_GET_FIRMWARE_VERSION */ |
139 | struct pn533_fw_version { |
140 | u8 ic; |
141 | u8 ver; |
142 | u8 rev; |
143 | u8 support; |
144 | }; |
145 | |
146 | /* PN533_CMD_RF_CONFIGURATION */ |
147 | #define PN533_CFGITEM_TIMING 0x02 |
148 | #define PN533_CFGITEM_MAX_RETRIES 0x05 |
149 | #define PN533_CFGITEM_PASORI 0x82 |
150 | |
151 | #define PN533_CONFIG_TIMING_102 0xb |
152 | #define PN533_CONFIG_TIMING_204 0xc |
153 | #define PN533_CONFIG_TIMING_409 0xd |
154 | #define PN533_CONFIG_TIMING_819 0xe |
155 | |
156 | #define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00 |
157 | #define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF |
158 | |
159 | struct pn533_config_max_retries { |
160 | u8 mx_rty_atr; |
161 | u8 mx_rty_psl; |
162 | u8 mx_rty_passive_act; |
163 | } __packed; |
164 | |
165 | struct pn533_config_timing { |
166 | u8 rfu; |
167 | u8 atr_res_timeout; |
168 | u8 dep_timeout; |
169 | } __packed; |
170 | |
171 | /* PN533_CMD_IN_LIST_PASSIVE_TARGET */ |
172 | |
173 | /* felica commands opcode */ |
174 | #define PN533_FELICA_OPC_SENSF_REQ 0 |
175 | #define PN533_FELICA_OPC_SENSF_RES 1 |
176 | /* felica SENSF_REQ parameters */ |
177 | #define PN533_FELICA_SENSF_SC_ALL 0xFFFF |
178 | #define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0 |
179 | #define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1 |
180 | #define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2 |
181 | |
182 | /* type B initiator_data values */ |
183 | #define PN533_TYPE_B_AFI_ALL_FAMILIES 0 |
184 | #define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0 |
185 | #define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1 |
186 | |
187 | union pn533_cmd_poll_initdata { |
188 | struct { |
189 | u8 afi; |
190 | u8 polling_method; |
191 | } __packed type_b; |
192 | struct { |
193 | u8 opcode; |
194 | __be16 sc; |
195 | u8 rc; |
196 | u8 tsn; |
197 | } __packed felica; |
198 | }; |
199 | |
200 | /* Poll modulations */ |
201 | enum { |
202 | PN533_POLL_MOD_106KBPS_A, |
203 | PN533_POLL_MOD_212KBPS_FELICA, |
204 | PN533_POLL_MOD_424KBPS_FELICA, |
205 | PN533_POLL_MOD_106KBPS_JEWEL, |
206 | PN533_POLL_MOD_847KBPS_B, |
207 | PN533_LISTEN_MOD, |
208 | |
209 | __PN533_POLL_MOD_AFTER_LAST, |
210 | }; |
211 | #define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1) |
212 | |
213 | struct pn533_poll_modulations { |
214 | struct { |
215 | u8 maxtg; |
216 | u8 brty; |
217 | union pn533_cmd_poll_initdata initiator_data; |
218 | } __packed data; |
219 | u8 len; |
220 | }; |
221 | |
222 | static const struct pn533_poll_modulations poll_mod[] = { |
223 | [PN533_POLL_MOD_106KBPS_A] = { |
224 | .data = { |
225 | .maxtg = 1, |
226 | .brty = 0, |
227 | }, |
228 | .len = 2, |
229 | }, |
230 | [PN533_POLL_MOD_212KBPS_FELICA] = { |
231 | .data = { |
232 | .maxtg = 1, |
233 | .brty = 1, |
234 | .initiator_data.felica = { |
235 | .opcode = PN533_FELICA_OPC_SENSF_REQ, |
236 | .sc = PN533_FELICA_SENSF_SC_ALL, |
237 | .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE, |
238 | .tsn = 0, |
239 | }, |
240 | }, |
241 | .len = 7, |
242 | }, |
243 | [PN533_POLL_MOD_424KBPS_FELICA] = { |
244 | .data = { |
245 | .maxtg = 1, |
246 | .brty = 2, |
247 | .initiator_data.felica = { |
248 | .opcode = PN533_FELICA_OPC_SENSF_REQ, |
249 | .sc = PN533_FELICA_SENSF_SC_ALL, |
250 | .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE, |
251 | .tsn = 0, |
252 | }, |
253 | }, |
254 | .len = 7, |
255 | }, |
256 | [PN533_POLL_MOD_106KBPS_JEWEL] = { |
257 | .data = { |
258 | .maxtg = 1, |
259 | .brty = 4, |
260 | }, |
261 | .len = 2, |
262 | }, |
263 | [PN533_POLL_MOD_847KBPS_B] = { |
264 | .data = { |
265 | .maxtg = 1, |
266 | .brty = 8, |
267 | .initiator_data.type_b = { |
268 | .afi = PN533_TYPE_B_AFI_ALL_FAMILIES, |
269 | .polling_method = |
270 | PN533_TYPE_B_POLL_METHOD_TIMESLOT, |
271 | }, |
272 | }, |
273 | .len = 3, |
274 | }, |
275 | [PN533_LISTEN_MOD] = { |
276 | .len = 0, |
277 | }, |
278 | }; |
279 | |
280 | /* PN533_CMD_IN_ATR */ |
281 | |
282 | struct pn533_cmd_activate_response { |
283 | u8 status; |
284 | u8 nfcid3t[10]; |
285 | u8 didt; |
286 | u8 bst; |
287 | u8 brt; |
288 | u8 to; |
289 | u8 ppt; |
290 | /* optional */ |
291 | u8 gt[]; |
292 | } __packed; |
293 | |
294 | struct pn533_cmd_jump_dep_response { |
295 | u8 status; |
296 | u8 tg; |
297 | u8 nfcid3t[10]; |
298 | u8 didt; |
299 | u8 bst; |
300 | u8 brt; |
301 | u8 to; |
302 | u8 ppt; |
303 | /* optional */ |
304 | u8 gt[]; |
305 | } __packed; |
306 | |
307 | |
308 | /* PN533_TG_INIT_AS_TARGET */ |
309 | #define PN533_INIT_TARGET_PASSIVE 0x1 |
310 | #define PN533_INIT_TARGET_DEP 0x2 |
311 | |
312 | #define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3 |
313 | #define PN533_INIT_TARGET_RESP_ACTIVE 0x1 |
314 | #define PN533_INIT_TARGET_RESP_DEP 0x4 |
315 | |
316 | struct pn533 { |
317 | struct usb_device *udev; |
318 | struct usb_interface *interface; |
319 | struct nfc_dev *nfc_dev; |
320 | |
321 | struct urb *out_urb; |
322 | struct urb *in_urb; |
323 | |
324 | struct sk_buff_head resp_q; |
325 | |
326 | struct workqueue_struct *wq; |
327 | struct work_struct cmd_work; |
328 | struct work_struct cmd_complete_work; |
329 | struct work_struct poll_work; |
330 | struct work_struct mi_work; |
331 | struct work_struct tg_work; |
332 | struct timer_list listen_timer; |
333 | int wq_in_error; |
334 | int cancel_listen; |
335 | |
336 | pn533_cmd_complete_t cmd_complete; |
337 | void *cmd_complete_arg; |
338 | void *cmd_complete_mi_arg; |
339 | struct mutex cmd_lock; |
340 | u8 cmd; |
341 | |
342 | struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1]; |
343 | u8 poll_mod_count; |
344 | u8 poll_mod_curr; |
345 | u32 poll_protocols; |
346 | u32 listen_protocols; |
347 | |
348 | u8 *gb; |
349 | size_t gb_len; |
350 | |
351 | u8 tgt_available_prots; |
352 | u8 tgt_active_prot; |
353 | u8 tgt_mode; |
354 | |
355 | u32 device_type; |
356 | |
357 | struct list_head cmd_queue; |
358 | u8 cmd_pending; |
359 | |
360 | struct pn533_frame_ops *ops; |
361 | }; |
362 | |
363 | struct pn533_cmd { |
364 | struct list_head queue; |
365 | u8 cmd_code; |
366 | struct sk_buff *req; |
367 | struct sk_buff *resp; |
368 | int resp_len; |
369 | void *arg; |
370 | }; |
371 | |
372 | struct pn533_frame { |
373 | u8 preamble; |
374 | __be16 start_frame; |
375 | u8 datalen; |
376 | u8 datalen_checksum; |
377 | u8 data[]; |
378 | } __packed; |
379 | |
380 | struct pn533_frame_ops { |
381 | void (*tx_frame_init)(void *frame, u8 cmd_code); |
382 | void (*tx_frame_finish)(void *frame); |
383 | void (*tx_update_payload_len)(void *frame, int len); |
384 | int tx_header_len; |
385 | int tx_tail_len; |
386 | |
387 | bool (*rx_is_frame_valid)(void *frame); |
388 | int (*rx_frame_size)(void *frame); |
389 | int rx_header_len; |
390 | int rx_tail_len; |
391 | |
392 | int max_payload_len; |
393 | u8 (*get_cmd_code)(void *frame); |
394 | }; |
395 | |
396 | /* The rule: value + checksum = 0 */ |
397 | static inline u8 pn533_checksum(u8 value) |
398 | { |
399 | return ~value + 1; |
400 | } |
401 | |
402 | /* The rule: sum(data elements) + checksum = 0 */ |
403 | static u8 pn533_data_checksum(u8 *data, int datalen) |
404 | { |
405 | u8 sum = 0; |
406 | int i; |
407 | |
408 | for (i = 0; i < datalen; i++) |
409 | sum += data[i]; |
410 | |
411 | return pn533_checksum(sum); |
412 | } |
413 | |
414 | static void pn533_tx_frame_init(void *_frame, u8 cmd_code) |
415 | { |
416 | struct pn533_frame *frame = _frame; |
417 | |
418 | frame->preamble = 0; |
419 | frame->start_frame = cpu_to_be16(PN533_SOF); |
420 | PN533_FRAME_IDENTIFIER(frame) = PN533_DIR_OUT; |
421 | PN533_FRAME_CMD(frame) = cmd_code; |
422 | frame->datalen = 2; |
423 | } |
424 | |
425 | static void pn533_tx_frame_finish(void *_frame) |
426 | { |
427 | struct pn533_frame *frame = _frame; |
428 | |
429 | frame->datalen_checksum = pn533_checksum(frame->datalen); |
430 | |
431 | PN533_FRAME_CHECKSUM(frame) = |
432 | pn533_data_checksum(frame->data, frame->datalen); |
433 | |
434 | PN533_FRAME_POSTAMBLE(frame) = 0; |
435 | } |
436 | |
437 | static void pn533_tx_update_payload_len(void *_frame, int len) |
438 | { |
439 | struct pn533_frame *frame = _frame; |
440 | |
441 | frame->datalen += len; |
442 | } |
443 | |
444 | static bool pn533_rx_frame_is_valid(void *_frame) |
445 | { |
446 | u8 checksum; |
447 | struct pn533_frame *frame = _frame; |
448 | |
449 | if (frame->start_frame != cpu_to_be16(PN533_SOF)) |
450 | return false; |
451 | |
452 | checksum = pn533_checksum(frame->datalen); |
453 | if (checksum != frame->datalen_checksum) |
454 | return false; |
455 | |
456 | checksum = pn533_data_checksum(frame->data, frame->datalen); |
457 | if (checksum != PN533_FRAME_CHECKSUM(frame)) |
458 | return false; |
459 | |
460 | return true; |
461 | } |
462 | |
463 | static bool pn533_rx_frame_is_ack(struct pn533_frame *frame) |
464 | { |
465 | if (frame->start_frame != cpu_to_be16(PN533_SOF)) |
466 | return false; |
467 | |
468 | if (frame->datalen != 0 || frame->datalen_checksum != 0xFF) |
469 | return false; |
470 | |
471 | return true; |
472 | } |
473 | |
474 | static inline int pn533_rx_frame_size(void *frame) |
475 | { |
476 | struct pn533_frame *f = frame; |
477 | |
478 | return sizeof(struct pn533_frame) + f->datalen + PN533_FRAME_TAIL_LEN; |
479 | } |
480 | |
481 | static u8 pn533_get_cmd_code(void *frame) |
482 | { |
483 | struct pn533_frame *f = frame; |
484 | |
485 | return PN533_FRAME_CMD(f); |
486 | } |
487 | |
488 | static struct pn533_frame_ops pn533_std_frame_ops = { |
489 | .tx_frame_init = pn533_tx_frame_init, |
490 | .tx_frame_finish = pn533_tx_frame_finish, |
491 | .tx_update_payload_len = pn533_tx_update_payload_len, |
492 | .tx_header_len = PN533_FRAME_HEADER_LEN, |
493 | .tx_tail_len = PN533_FRAME_TAIL_LEN, |
494 | |
495 | .rx_is_frame_valid = pn533_rx_frame_is_valid, |
496 | .rx_frame_size = pn533_rx_frame_size, |
497 | .rx_header_len = PN533_FRAME_HEADER_LEN, |
498 | .rx_tail_len = PN533_FRAME_TAIL_LEN, |
499 | |
500 | .max_payload_len = PN533_FRAME_MAX_PAYLOAD_LEN, |
501 | .get_cmd_code = pn533_get_cmd_code, |
502 | }; |
503 | |
504 | static bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame) |
505 | { |
506 | return (dev->ops->get_cmd_code(frame) == PN533_CMD_RESPONSE(dev->cmd)); |
507 | } |
508 | |
509 | |
510 | static void pn533_wq_cmd_complete(struct work_struct *work) |
511 | { |
512 | struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work); |
513 | int rc; |
514 | |
515 | rc = dev->cmd_complete(dev, dev->cmd_complete_arg, dev->wq_in_error); |
516 | if (rc != -EINPROGRESS) |
517 | queue_work(dev->wq, &dev->cmd_work); |
518 | } |
519 | |
520 | static void pn533_recv_response(struct urb *urb) |
521 | { |
522 | struct pn533 *dev = urb->context; |
523 | u8 *in_frame; |
524 | |
525 | switch (urb->status) { |
526 | case 0: |
527 | break; /* success */ |
528 | case -ECONNRESET: |
529 | case -ENOENT: |
530 | nfc_dev_dbg(&dev->interface->dev, |
531 | "The urb has been canceled (status %d)", |
532 | urb->status); |
533 | dev->wq_in_error = urb->status; |
534 | goto sched_wq; |
535 | case -ESHUTDOWN: |
536 | default: |
537 | nfc_dev_err(&dev->interface->dev, |
538 | "Urb failure (status %d)", urb->status); |
539 | dev->wq_in_error = urb->status; |
540 | goto sched_wq; |
541 | } |
542 | |
543 | in_frame = dev->in_urb->transfer_buffer; |
544 | |
545 | nfc_dev_dbg(&dev->interface->dev, "Received a frame."); |
546 | print_hex_dump(KERN_DEBUG, "PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, |
547 | in_frame, dev->ops->rx_frame_size(in_frame), false); |
548 | |
549 | if (!dev->ops->rx_is_frame_valid(in_frame)) { |
550 | nfc_dev_err(&dev->interface->dev, "Received an invalid frame"); |
551 | dev->wq_in_error = -EIO; |
552 | goto sched_wq; |
553 | } |
554 | |
555 | if (!pn533_rx_frame_is_cmd_response(dev, in_frame)) { |
556 | nfc_dev_err(&dev->interface->dev, |
557 | "It it not the response to the last command"); |
558 | dev->wq_in_error = -EIO; |
559 | goto sched_wq; |
560 | } |
561 | |
562 | dev->wq_in_error = 0; |
563 | |
564 | sched_wq: |
565 | queue_work(dev->wq, &dev->cmd_complete_work); |
566 | } |
567 | |
568 | static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags) |
569 | { |
570 | dev->in_urb->complete = pn533_recv_response; |
571 | |
572 | return usb_submit_urb(dev->in_urb, flags); |
573 | } |
574 | |
575 | static void pn533_recv_ack(struct urb *urb) |
576 | { |
577 | struct pn533 *dev = urb->context; |
578 | struct pn533_frame *in_frame; |
579 | int rc; |
580 | |
581 | switch (urb->status) { |
582 | case 0: |
583 | break; /* success */ |
584 | case -ECONNRESET: |
585 | case -ENOENT: |
586 | nfc_dev_dbg(&dev->interface->dev, |
587 | "The urb has been stopped (status %d)", |
588 | urb->status); |
589 | dev->wq_in_error = urb->status; |
590 | goto sched_wq; |
591 | case -ESHUTDOWN: |
592 | default: |
593 | nfc_dev_err(&dev->interface->dev, |
594 | "Urb failure (status %d)", urb->status); |
595 | dev->wq_in_error = urb->status; |
596 | goto sched_wq; |
597 | } |
598 | |
599 | in_frame = dev->in_urb->transfer_buffer; |
600 | |
601 | if (!pn533_rx_frame_is_ack(in_frame)) { |
602 | nfc_dev_err(&dev->interface->dev, "Received an invalid ack"); |
603 | dev->wq_in_error = -EIO; |
604 | goto sched_wq; |
605 | } |
606 | |
607 | rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC); |
608 | if (rc) { |
609 | nfc_dev_err(&dev->interface->dev, |
610 | "usb_submit_urb failed with result %d", rc); |
611 | dev->wq_in_error = rc; |
612 | goto sched_wq; |
613 | } |
614 | |
615 | return; |
616 | |
617 | sched_wq: |
618 | queue_work(dev->wq, &dev->cmd_complete_work); |
619 | } |
620 | |
621 | static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags) |
622 | { |
623 | dev->in_urb->complete = pn533_recv_ack; |
624 | |
625 | return usb_submit_urb(dev->in_urb, flags); |
626 | } |
627 | |
628 | static int pn533_send_ack(struct pn533 *dev, gfp_t flags) |
629 | { |
630 | u8 ack[PN533_FRAME_ACK_SIZE] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00}; |
631 | /* spec 7.1.1.3: Preamble, SoPC (2), ACK Code (2), Postamble */ |
632 | int rc; |
633 | |
634 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); |
635 | |
636 | dev->out_urb->transfer_buffer = ack; |
637 | dev->out_urb->transfer_buffer_length = sizeof(ack); |
638 | rc = usb_submit_urb(dev->out_urb, flags); |
639 | |
640 | return rc; |
641 | } |
642 | |
643 | static int __pn533_send_frame_async(struct pn533 *dev, |
644 | struct sk_buff *out, |
645 | struct sk_buff *in, |
646 | int in_len, |
647 | pn533_cmd_complete_t cmd_complete, |
648 | void *arg) |
649 | { |
650 | int rc; |
651 | |
652 | dev->cmd = dev->ops->get_cmd_code(out->data); |
653 | dev->cmd_complete = cmd_complete; |
654 | dev->cmd_complete_arg = arg; |
655 | |
656 | dev->out_urb->transfer_buffer = out->data; |
657 | dev->out_urb->transfer_buffer_length = out->len; |
658 | |
659 | dev->in_urb->transfer_buffer = in->data; |
660 | dev->in_urb->transfer_buffer_length = in_len; |
661 | |
662 | print_hex_dump(KERN_DEBUG, "PN533 TX: ", DUMP_PREFIX_NONE, 16, 1, |
663 | out->data, out->len, false); |
664 | |
665 | rc = usb_submit_urb(dev->out_urb, GFP_KERNEL); |
666 | if (rc) |
667 | return rc; |
668 | |
669 | rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL); |
670 | if (rc) |
671 | goto error; |
672 | |
673 | return 0; |
674 | |
675 | error: |
676 | usb_unlink_urb(dev->out_urb); |
677 | return rc; |
678 | } |
679 | |
680 | static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code, |
681 | struct sk_buff *skb) |
682 | { |
683 | /* payload is already there, just update datalen */ |
684 | int payload_len = skb->len; |
685 | struct pn533_frame_ops *ops = dev->ops; |
686 | |
687 | |
688 | skb_push(skb, ops->tx_header_len); |
689 | skb_put(skb, ops->tx_tail_len); |
690 | |
691 | ops->tx_frame_init(skb->data, cmd_code); |
692 | ops->tx_update_payload_len(skb->data, payload_len); |
693 | ops->tx_frame_finish(skb->data); |
694 | } |
695 | |
696 | struct pn533_send_async_complete_arg { |
697 | pn533_send_async_complete_t complete_cb; |
698 | void *complete_cb_context; |
699 | struct sk_buff *resp; |
700 | struct sk_buff *req; |
701 | }; |
702 | |
703 | static int pn533_send_async_complete(struct pn533 *dev, void *_arg, int status) |
704 | { |
705 | struct pn533_send_async_complete_arg *arg = _arg; |
706 | |
707 | struct sk_buff *req = arg->req; |
708 | struct sk_buff *resp = arg->resp; |
709 | |
710 | int rc; |
711 | |
712 | dev_kfree_skb(req); |
713 | |
714 | if (status < 0) { |
715 | arg->complete_cb(dev, arg->complete_cb_context, |
716 | ERR_PTR(status)); |
717 | dev_kfree_skb(resp); |
718 | kfree(arg); |
719 | return status; |
720 | } |
721 | |
722 | skb_put(resp, dev->ops->rx_frame_size(resp->data)); |
723 | skb_pull(resp, dev->ops->rx_header_len); |
724 | skb_trim(resp, resp->len - dev->ops->rx_tail_len); |
725 | |
726 | rc = arg->complete_cb(dev, arg->complete_cb_context, resp); |
727 | |
728 | kfree(arg); |
729 | return rc; |
730 | } |
731 | |
732 | static int __pn533_send_async(struct pn533 *dev, u8 cmd_code, |
733 | struct sk_buff *req, struct sk_buff *resp, |
734 | int resp_len, |
735 | pn533_send_async_complete_t complete_cb, |
736 | void *complete_cb_context) |
737 | { |
738 | struct pn533_cmd *cmd; |
739 | struct pn533_send_async_complete_arg *arg; |
740 | int rc = 0; |
741 | |
742 | nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x", cmd_code); |
743 | |
744 | arg = kzalloc(sizeof(*arg), GFP_KERNEL); |
745 | if (!arg) |
746 | return -ENOMEM; |
747 | |
748 | arg->complete_cb = complete_cb; |
749 | arg->complete_cb_context = complete_cb_context; |
750 | arg->resp = resp; |
751 | arg->req = req; |
752 | |
753 | pn533_build_cmd_frame(dev, cmd_code, req); |
754 | |
755 | mutex_lock(&dev->cmd_lock); |
756 | |
757 | if (!dev->cmd_pending) { |
758 | rc = __pn533_send_frame_async(dev, req, resp, resp_len, |
759 | pn533_send_async_complete, arg); |
760 | if (rc) |
761 | goto error; |
762 | |
763 | dev->cmd_pending = 1; |
764 | goto unlock; |
765 | } |
766 | |
767 | nfc_dev_dbg(&dev->interface->dev, "%s Queueing command 0x%x", __func__, |
768 | cmd_code); |
769 | |
770 | cmd = kzalloc(sizeof(struct pn533_cmd), GFP_KERNEL); |
771 | if (!cmd) { |
772 | rc = -ENOMEM; |
773 | goto error; |
774 | } |
775 | |
776 | INIT_LIST_HEAD(&cmd->queue); |
777 | cmd->cmd_code = cmd_code; |
778 | cmd->req = req; |
779 | cmd->resp = resp; |
780 | cmd->resp_len = resp_len; |
781 | cmd->arg = arg; |
782 | |
783 | list_add_tail(&cmd->queue, &dev->cmd_queue); |
784 | |
785 | goto unlock; |
786 | |
787 | error: |
788 | kfree(arg); |
789 | unlock: |
790 | mutex_unlock(&dev->cmd_lock); |
791 | return rc; |
792 | } |
793 | |
794 | static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code, |
795 | struct sk_buff *req, |
796 | pn533_send_async_complete_t complete_cb, |
797 | void *complete_cb_context) |
798 | { |
799 | struct sk_buff *resp; |
800 | int rc; |
801 | int resp_len = dev->ops->rx_header_len + |
802 | dev->ops->max_payload_len + |
803 | dev->ops->rx_tail_len; |
804 | |
805 | resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL); |
806 | if (!resp) |
807 | return -ENOMEM; |
808 | |
809 | rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb, |
810 | complete_cb_context); |
811 | if (rc) |
812 | dev_kfree_skb(resp); |
813 | |
814 | return rc; |
815 | } |
816 | |
817 | static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code, |
818 | struct sk_buff *req, |
819 | pn533_send_async_complete_t complete_cb, |
820 | void *complete_cb_context) |
821 | { |
822 | struct sk_buff *resp; |
823 | int rc; |
824 | int resp_len = dev->ops->rx_header_len + |
825 | dev->ops->max_payload_len + |
826 | dev->ops->rx_tail_len; |
827 | |
828 | resp = alloc_skb(resp_len, GFP_KERNEL); |
829 | if (!resp) |
830 | return -ENOMEM; |
831 | |
832 | rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb, |
833 | complete_cb_context); |
834 | if (rc) |
835 | dev_kfree_skb(resp); |
836 | |
837 | return rc; |
838 | } |
839 | |
840 | /* |
841 | * pn533_send_cmd_direct_async |
842 | * |
843 | * The function sends a piority cmd directly to the chip omiting the cmd |
844 | * queue. It's intended to be used by chaining mechanism of received responses |
845 | * where the host has to request every single chunk of data before scheduling |
846 | * next cmd from the queue. |
847 | */ |
848 | static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code, |
849 | struct sk_buff *req, |
850 | pn533_send_async_complete_t complete_cb, |
851 | void *complete_cb_context) |
852 | { |
853 | struct pn533_send_async_complete_arg *arg; |
854 | struct sk_buff *resp; |
855 | int rc; |
856 | int resp_len = dev->ops->rx_header_len + |
857 | dev->ops->max_payload_len + |
858 | dev->ops->rx_tail_len; |
859 | |
860 | resp = alloc_skb(resp_len, GFP_KERNEL); |
861 | if (!resp) |
862 | return -ENOMEM; |
863 | |
864 | arg = kzalloc(sizeof(*arg), GFP_KERNEL); |
865 | if (!arg) { |
866 | dev_kfree_skb(resp); |
867 | return -ENOMEM; |
868 | } |
869 | |
870 | arg->complete_cb = complete_cb; |
871 | arg->complete_cb_context = complete_cb_context; |
872 | arg->resp = resp; |
873 | arg->req = req; |
874 | |
875 | pn533_build_cmd_frame(dev, cmd_code, req); |
876 | |
877 | rc = __pn533_send_frame_async(dev, req, resp, resp_len, |
878 | pn533_send_async_complete, arg); |
879 | if (rc < 0) { |
880 | dev_kfree_skb(resp); |
881 | kfree(arg); |
882 | } |
883 | |
884 | return rc; |
885 | } |
886 | |
887 | static void pn533_wq_cmd(struct work_struct *work) |
888 | { |
889 | struct pn533 *dev = container_of(work, struct pn533, cmd_work); |
890 | struct pn533_cmd *cmd; |
891 | |
892 | mutex_lock(&dev->cmd_lock); |
893 | |
894 | if (list_empty(&dev->cmd_queue)) { |
895 | dev->cmd_pending = 0; |
896 | mutex_unlock(&dev->cmd_lock); |
897 | return; |
898 | } |
899 | |
900 | cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue); |
901 | |
902 | list_del(&cmd->queue); |
903 | |
904 | mutex_unlock(&dev->cmd_lock); |
905 | |
906 | __pn533_send_frame_async(dev, cmd->req, cmd->resp, cmd->resp_len, |
907 | pn533_send_async_complete, cmd->arg); |
908 | |
909 | kfree(cmd); |
910 | } |
911 | |
912 | struct pn533_sync_cmd_response { |
913 | struct sk_buff *resp; |
914 | struct completion done; |
915 | }; |
916 | |
917 | static int pn533_send_sync_complete(struct pn533 *dev, void *_arg, |
918 | struct sk_buff *resp) |
919 | { |
920 | struct pn533_sync_cmd_response *arg = _arg; |
921 | |
922 | arg->resp = resp; |
923 | complete(&arg->done); |
924 | |
925 | return 0; |
926 | } |
927 | |
928 | /* pn533_send_cmd_sync |
929 | * |
930 | * Please note the req parameter is freed inside the function to |
931 | * limit a number of return value interpretations by the caller. |
932 | * |
933 | * 1. negative in case of error during TX path -> req should be freed |
934 | * |
935 | * 2. negative in case of error during RX path -> req should not be freed |
936 | * as it's been already freed at the begining of RX path by |
937 | * async_complete_cb. |
938 | * |
939 | * 3. valid pointer in case of succesfult RX path |
940 | * |
941 | * A caller has to check a return value with IS_ERR macro. If the test pass, |
942 | * the returned pointer is valid. |
943 | * |
944 | * */ |
945 | static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code, |
946 | struct sk_buff *req) |
947 | { |
948 | int rc; |
949 | struct pn533_sync_cmd_response arg; |
950 | |
951 | init_completion(&arg.done); |
952 | |
953 | rc = pn533_send_cmd_async(dev, cmd_code, req, |
954 | pn533_send_sync_complete, &arg); |
955 | if (rc) { |
956 | dev_kfree_skb(req); |
957 | return ERR_PTR(rc); |
958 | } |
959 | |
960 | wait_for_completion(&arg.done); |
961 | |
962 | return arg.resp; |
963 | } |
964 | |
965 | static void pn533_send_complete(struct urb *urb) |
966 | { |
967 | struct pn533 *dev = urb->context; |
968 | |
969 | switch (urb->status) { |
970 | case 0: |
971 | break; /* success */ |
972 | case -ECONNRESET: |
973 | case -ENOENT: |
974 | nfc_dev_dbg(&dev->interface->dev, |
975 | "The urb has been stopped (status %d)", |
976 | urb->status); |
977 | break; |
978 | case -ESHUTDOWN: |
979 | default: |
980 | nfc_dev_err(&dev->interface->dev, |
981 | "Urb failure (status %d)", urb->status); |
982 | } |
983 | } |
984 | |
985 | static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size) |
986 | { |
987 | struct sk_buff *skb; |
988 | |
989 | skb = alloc_skb(dev->ops->tx_header_len + |
990 | size + |
991 | dev->ops->tx_tail_len, GFP_KERNEL); |
992 | |
993 | if (skb) |
994 | skb_reserve(skb, dev->ops->tx_header_len); |
995 | |
996 | return skb; |
997 | } |
998 | |
999 | struct pn533_target_type_a { |
1000 | __be16 sens_res; |
1001 | u8 sel_res; |
1002 | u8 nfcid_len; |
1003 | u8 nfcid_data[]; |
1004 | } __packed; |
1005 | |
1006 | |
1007 | #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6)) |
1008 | #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0)) |
1009 | #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8)) |
1010 | |
1011 | #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00 |
1012 | #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C |
1013 | |
1014 | #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5) |
1015 | #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2) |
1016 | |
1017 | #define PN533_TYPE_A_SEL_PROT_MIFARE 0 |
1018 | #define PN533_TYPE_A_SEL_PROT_ISO14443 1 |
1019 | #define PN533_TYPE_A_SEL_PROT_DEP 2 |
1020 | #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3 |
1021 | |
1022 | static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a, |
1023 | int target_data_len) |
1024 | { |
1025 | u8 ssd; |
1026 | u8 platconf; |
1027 | |
1028 | if (target_data_len < sizeof(struct pn533_target_type_a)) |
1029 | return false; |
1030 | |
1031 | /* The lenght check of nfcid[] and ats[] are not being performed because |
1032 | the values are not being used */ |
1033 | |
1034 | /* Requirement 4.6.3.3 from NFC Forum Digital Spec */ |
1035 | ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res); |
1036 | platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res); |
1037 | |
1038 | if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL && |
1039 | platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) || |
1040 | (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL && |
1041 | platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL)) |
1042 | return false; |
1043 | |
1044 | /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */ |
1045 | if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0) |
1046 | return false; |
1047 | |
1048 | return true; |
1049 | } |
1050 | |
1051 | static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data, |
1052 | int tgt_data_len) |
1053 | { |
1054 | struct pn533_target_type_a *tgt_type_a; |
1055 | |
1056 | tgt_type_a = (struct pn533_target_type_a *)tgt_data; |
1057 | |
1058 | if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len)) |
1059 | return -EPROTO; |
1060 | |
1061 | switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) { |
1062 | case PN533_TYPE_A_SEL_PROT_MIFARE: |
1063 | nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK; |
1064 | break; |
1065 | case PN533_TYPE_A_SEL_PROT_ISO14443: |
1066 | nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK; |
1067 | break; |
1068 | case PN533_TYPE_A_SEL_PROT_DEP: |
1069 | nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK; |
1070 | break; |
1071 | case PN533_TYPE_A_SEL_PROT_ISO14443_DEP: |
1072 | nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK | |
1073 | NFC_PROTO_NFC_DEP_MASK; |
1074 | break; |
1075 | } |
1076 | |
1077 | nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res); |
1078 | nfc_tgt->sel_res = tgt_type_a->sel_res; |
1079 | nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len; |
1080 | memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len); |
1081 | |
1082 | return 0; |
1083 | } |
1084 | |
1085 | struct pn533_target_felica { |
1086 | u8 pol_res; |
1087 | u8 opcode; |
1088 | u8 nfcid2[8]; |
1089 | u8 pad[8]; |
1090 | /* optional */ |
1091 | u8 syst_code[]; |
1092 | } __packed; |
1093 | |
1094 | #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01 |
1095 | #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE |
1096 | |
1097 | static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica, |
1098 | int target_data_len) |
1099 | { |
1100 | if (target_data_len < sizeof(struct pn533_target_felica)) |
1101 | return false; |
1102 | |
1103 | if (felica->opcode != PN533_FELICA_OPC_SENSF_RES) |
1104 | return false; |
1105 | |
1106 | return true; |
1107 | } |
1108 | |
1109 | static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data, |
1110 | int tgt_data_len) |
1111 | { |
1112 | struct pn533_target_felica *tgt_felica; |
1113 | |
1114 | tgt_felica = (struct pn533_target_felica *)tgt_data; |
1115 | |
1116 | if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len)) |
1117 | return -EPROTO; |
1118 | |
1119 | if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) && |
1120 | (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2)) |
1121 | nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK; |
1122 | else |
1123 | nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK; |
1124 | |
1125 | memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9); |
1126 | nfc_tgt->sensf_res_len = 9; |
1127 | |
1128 | return 0; |
1129 | } |
1130 | |
1131 | struct pn533_target_jewel { |
1132 | __be16 sens_res; |
1133 | u8 jewelid[4]; |
1134 | } __packed; |
1135 | |
1136 | static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel, |
1137 | int target_data_len) |
1138 | { |
1139 | u8 ssd; |
1140 | u8 platconf; |
1141 | |
1142 | if (target_data_len < sizeof(struct pn533_target_jewel)) |
1143 | return false; |
1144 | |
1145 | /* Requirement 4.6.3.3 from NFC Forum Digital Spec */ |
1146 | ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res); |
1147 | platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res); |
1148 | |
1149 | if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL && |
1150 | platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) || |
1151 | (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL && |
1152 | platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL)) |
1153 | return false; |
1154 | |
1155 | return true; |
1156 | } |
1157 | |
1158 | static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data, |
1159 | int tgt_data_len) |
1160 | { |
1161 | struct pn533_target_jewel *tgt_jewel; |
1162 | |
1163 | tgt_jewel = (struct pn533_target_jewel *)tgt_data; |
1164 | |
1165 | if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len)) |
1166 | return -EPROTO; |
1167 | |
1168 | nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK; |
1169 | nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res); |
1170 | nfc_tgt->nfcid1_len = 4; |
1171 | memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len); |
1172 | |
1173 | return 0; |
1174 | } |
1175 | |
1176 | struct pn533_type_b_prot_info { |
1177 | u8 bitrate; |
1178 | u8 fsci_type; |
1179 | u8 fwi_adc_fo; |
1180 | } __packed; |
1181 | |
1182 | #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4) |
1183 | #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0) |
1184 | #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8 |
1185 | |
1186 | struct pn533_type_b_sens_res { |
1187 | u8 opcode; |
1188 | u8 nfcid[4]; |
1189 | u8 appdata[4]; |
1190 | struct pn533_type_b_prot_info prot_info; |
1191 | } __packed; |
1192 | |
1193 | #define PN533_TYPE_B_OPC_SENSB_RES 0x50 |
1194 | |
1195 | struct pn533_target_type_b { |
1196 | struct pn533_type_b_sens_res sensb_res; |
1197 | u8 attrib_res_len; |
1198 | u8 attrib_res[]; |
1199 | } __packed; |
1200 | |
1201 | static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b, |
1202 | int target_data_len) |
1203 | { |
1204 | if (target_data_len < sizeof(struct pn533_target_type_b)) |
1205 | return false; |
1206 | |
1207 | if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES) |
1208 | return false; |
1209 | |
1210 | if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) & |
1211 | PN533_TYPE_B_PROT_TYPE_RFU_MASK) |
1212 | return false; |
1213 | |
1214 | return true; |
1215 | } |
1216 | |
1217 | static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data, |
1218 | int tgt_data_len) |
1219 | { |
1220 | struct pn533_target_type_b *tgt_type_b; |
1221 | |
1222 | tgt_type_b = (struct pn533_target_type_b *)tgt_data; |
1223 | |
1224 | if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len)) |
1225 | return -EPROTO; |
1226 | |
1227 | nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK; |
1228 | |
1229 | return 0; |
1230 | } |
1231 | |
1232 | static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata, |
1233 | int tgdata_len) |
1234 | { |
1235 | struct nfc_target nfc_tgt; |
1236 | int rc; |
1237 | |
1238 | nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__, |
1239 | dev->poll_mod_curr); |
1240 | |
1241 | if (tg != 1) |
1242 | return -EPROTO; |
1243 | |
1244 | memset(&nfc_tgt, 0, sizeof(struct nfc_target)); |
1245 | |
1246 | switch (dev->poll_mod_curr) { |
1247 | case PN533_POLL_MOD_106KBPS_A: |
1248 | rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len); |
1249 | break; |
1250 | case PN533_POLL_MOD_212KBPS_FELICA: |
1251 | case PN533_POLL_MOD_424KBPS_FELICA: |
1252 | rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len); |
1253 | break; |
1254 | case PN533_POLL_MOD_106KBPS_JEWEL: |
1255 | rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len); |
1256 | break; |
1257 | case PN533_POLL_MOD_847KBPS_B: |
1258 | rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len); |
1259 | break; |
1260 | default: |
1261 | nfc_dev_err(&dev->interface->dev, |
1262 | "Unknown current poll modulation"); |
1263 | return -EPROTO; |
1264 | } |
1265 | |
1266 | if (rc) |
1267 | return rc; |
1268 | |
1269 | if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) { |
1270 | nfc_dev_dbg(&dev->interface->dev, |
1271 | "The Tg found doesn't have the desired protocol"); |
1272 | return -EAGAIN; |
1273 | } |
1274 | |
1275 | nfc_dev_dbg(&dev->interface->dev, |
1276 | "Target found - supported protocols: 0x%x", |
1277 | nfc_tgt.supported_protocols); |
1278 | |
1279 | dev->tgt_available_prots = nfc_tgt.supported_protocols; |
1280 | |
1281 | nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1); |
1282 | |
1283 | return 0; |
1284 | } |
1285 | |
1286 | static inline void pn533_poll_next_mod(struct pn533 *dev) |
1287 | { |
1288 | dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count; |
1289 | } |
1290 | |
1291 | static void pn533_poll_reset_mod_list(struct pn533 *dev) |
1292 | { |
1293 | dev->poll_mod_count = 0; |
1294 | } |
1295 | |
1296 | static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index) |
1297 | { |
1298 | dev->poll_mod_active[dev->poll_mod_count] = |
1299 | (struct pn533_poll_modulations *)&poll_mod[mod_index]; |
1300 | dev->poll_mod_count++; |
1301 | } |
1302 | |
1303 | static void pn533_poll_create_mod_list(struct pn533 *dev, |
1304 | u32 im_protocols, u32 tm_protocols) |
1305 | { |
1306 | pn533_poll_reset_mod_list(dev); |
1307 | |
1308 | if ((im_protocols & NFC_PROTO_MIFARE_MASK) || |
1309 | (im_protocols & NFC_PROTO_ISO14443_MASK) || |
1310 | (im_protocols & NFC_PROTO_NFC_DEP_MASK)) |
1311 | pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A); |
1312 | |
1313 | if (im_protocols & NFC_PROTO_FELICA_MASK || |
1314 | im_protocols & NFC_PROTO_NFC_DEP_MASK) { |
1315 | pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA); |
1316 | pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA); |
1317 | } |
1318 | |
1319 | if (im_protocols & NFC_PROTO_JEWEL_MASK) |
1320 | pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL); |
1321 | |
1322 | if (im_protocols & NFC_PROTO_ISO14443_B_MASK) |
1323 | pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B); |
1324 | |
1325 | if (tm_protocols) |
1326 | pn533_poll_add_mod(dev, PN533_LISTEN_MOD); |
1327 | } |
1328 | |
1329 | static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp) |
1330 | { |
1331 | u8 nbtg, tg, *tgdata; |
1332 | int rc, tgdata_len; |
1333 | |
1334 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); |
1335 | |
1336 | nbtg = resp->data[0]; |
1337 | tg = resp->data[1]; |
1338 | tgdata = &resp->data[2]; |
1339 | tgdata_len = resp->len - 2; /* nbtg + tg */ |
1340 | |
1341 | if (nbtg) { |
1342 | rc = pn533_target_found(dev, tg, tgdata, tgdata_len); |
1343 | |
1344 | /* We must stop the poll after a valid target found */ |
1345 | if (rc == 0) { |
1346 | pn533_poll_reset_mod_list(dev); |
1347 | return 0; |
1348 | } |
1349 | } |
1350 | |
1351 | return -EAGAIN; |
1352 | } |
1353 | |
1354 | static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev) |
1355 | { |
1356 | struct sk_buff *skb; |
1357 | u8 *felica, *nfcid3, *gb; |
1358 | |
1359 | u8 *gbytes = dev->gb; |
1360 | size_t gbytes_len = dev->gb_len; |
1361 | |
1362 | u8 felica_params[18] = {0x1, 0xfe, /* DEP */ |
1363 | 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */ |
1364 | 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, |
1365 | 0xff, 0xff}; /* System code */ |
1366 | |
1367 | u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */ |
1368 | 0x0, 0x0, 0x0, |
1369 | 0x40}; /* SEL_RES for DEP */ |
1370 | |
1371 | unsigned int skb_len = 36 + /* mode (1), mifare (6), |
1372 | felica (18), nfcid3 (10), gb_len (1) */ |
1373 | gbytes_len + |
1374 | 1; /* len Tk*/ |
1375 | |
1376 | skb = pn533_alloc_skb(dev, skb_len); |
1377 | if (!skb) |
1378 | return NULL; |
1379 | |
1380 | /* DEP support only */ |
1381 | *skb_put(skb, 1) = PN533_INIT_TARGET_DEP; |
1382 | |
1383 | /* MIFARE params */ |
1384 | memcpy(skb_put(skb, 6), mifare_params, 6); |
1385 | |
1386 | /* Felica params */ |
1387 | felica = skb_put(skb, 18); |
1388 | memcpy(felica, felica_params, 18); |
1389 | get_random_bytes(felica + 2, 6); |
1390 | |
1391 | /* NFCID3 */ |
1392 | nfcid3 = skb_put(skb, 10); |
1393 | memset(nfcid3, 0, 10); |
1394 | memcpy(nfcid3, felica, 8); |
1395 | |
1396 | /* General bytes */ |
1397 | *skb_put(skb, 1) = gbytes_len; |
1398 | |
1399 | gb = skb_put(skb, gbytes_len); |
1400 | memcpy(gb, gbytes, gbytes_len); |
1401 | |
1402 | /* Len Tk */ |
1403 | *skb_put(skb, 1) = 0; |
1404 | |
1405 | return skb; |
1406 | } |
1407 | |
1408 | #define PN533_CMD_DATAEXCH_HEAD_LEN 1 |
1409 | #define PN533_CMD_DATAEXCH_DATA_MAXLEN 262 |
1410 | static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg, |
1411 | struct sk_buff *resp) |
1412 | { |
1413 | u8 status; |
1414 | |
1415 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); |
1416 | |
1417 | if (IS_ERR(resp)) |
1418 | return PTR_ERR(resp); |
1419 | |
1420 | status = resp->data[0]; |
1421 | skb_pull(resp, sizeof(status)); |
1422 | |
1423 | if (status != 0) { |
1424 | nfc_tm_deactivated(dev->nfc_dev); |
1425 | dev->tgt_mode = 0; |
1426 | dev_kfree_skb(resp); |
1427 | return 0; |
1428 | } |
1429 | |
1430 | return nfc_tm_data_received(dev->nfc_dev, resp); |
1431 | } |
1432 | |
1433 | static void pn533_wq_tg_get_data(struct work_struct *work) |
1434 | { |
1435 | struct pn533 *dev = container_of(work, struct pn533, tg_work); |
1436 | |
1437 | struct sk_buff *skb; |
1438 | int rc; |
1439 | |
1440 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); |
1441 | |
1442 | skb = pn533_alloc_skb(dev, 0); |
1443 | if (!skb) |
1444 | return; |
1445 | |
1446 | rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb, |
1447 | pn533_tm_get_data_complete, NULL); |
1448 | |
1449 | if (rc < 0) |
1450 | dev_kfree_skb(skb); |
1451 | |
1452 | return; |
1453 | } |
1454 | |
1455 | #define ATR_REQ_GB_OFFSET 17 |
1456 | static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp) |
1457 | { |
1458 | u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb; |
1459 | size_t gb_len; |
1460 | int rc; |
1461 | |
1462 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); |
1463 | |
1464 | if (resp->len < ATR_REQ_GB_OFFSET + 1) |
1465 | return -EINVAL; |
1466 | |
1467 | mode = resp->data[0]; |
1468 | cmd = &resp->data[1]; |
1469 | |
1470 | nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n", |
1471 | mode, resp->len); |
1472 | |
1473 | if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) == |
1474 | PN533_INIT_TARGET_RESP_ACTIVE) |
1475 | comm_mode = NFC_COMM_ACTIVE; |
1476 | |
1477 | if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */ |
1478 | return -EOPNOTSUPP; |
1479 | |
1480 | gb = cmd + ATR_REQ_GB_OFFSET; |
1481 | gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1); |
1482 | |
1483 | rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK, |
1484 | comm_mode, gb, gb_len); |
1485 | if (rc < 0) { |
1486 | nfc_dev_err(&dev->interface->dev, |
1487 | "Error when signaling target activation"); |
1488 | return rc; |
1489 | } |
1490 | |
1491 | dev->tgt_mode = 1; |
1492 | queue_work(dev->wq, &dev->tg_work); |
1493 | |
1494 | return 0; |
1495 | } |
1496 | |
1497 | static void pn533_listen_mode_timer(unsigned long data) |
1498 | { |
1499 | struct pn533 *dev = (struct pn533 *)data; |
1500 | |
1501 | nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout"); |
1502 | |
1503 | /* An ack will cancel the last issued command (poll) */ |
1504 | pn533_send_ack(dev, GFP_ATOMIC); |
1505 | |
1506 | dev->cancel_listen = 1; |
1507 | |
1508 | pn533_poll_next_mod(dev); |
1509 | |
1510 | queue_work(dev->wq, &dev->poll_work); |
1511 | } |
1512 | |
1513 | static int pn533_poll_complete(struct pn533 *dev, void *arg, |
1514 | struct sk_buff *resp) |
1515 | { |
1516 | struct pn533_poll_modulations *cur_mod; |
1517 | int rc; |
1518 | |
1519 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); |
1520 | |
1521 | if (IS_ERR(resp)) { |
1522 | rc = PTR_ERR(resp); |
1523 | |
1524 | nfc_dev_err(&dev->interface->dev, "%s Poll complete error %d", |
1525 | __func__, rc); |
1526 | |
1527 | if (rc == -ENOENT) { |
1528 | if (dev->poll_mod_count != 0) |
1529 | return rc; |
1530 | else |
1531 | goto stop_poll; |
1532 | } else if (rc < 0) { |
1533 | nfc_dev_err(&dev->interface->dev, |
1534 | "Error %d when running poll", rc); |
1535 | goto stop_poll; |
1536 | } |
1537 | } |
1538 | |
1539 | cur_mod = dev->poll_mod_active[dev->poll_mod_curr]; |
1540 | |
1541 | if (cur_mod->len == 0) { /* Target mode */ |
1542 | del_timer(&dev->listen_timer); |
1543 | rc = pn533_init_target_complete(dev, resp); |
1544 | goto done; |
1545 | } |
1546 | |
1547 | /* Initiator mode */ |
1548 | rc = pn533_start_poll_complete(dev, resp); |
1549 | if (!rc) |
1550 | goto done; |
1551 | |
1552 | pn533_poll_next_mod(dev); |
1553 | queue_work(dev->wq, &dev->poll_work); |
1554 | |
1555 | done: |
1556 | dev_kfree_skb(resp); |
1557 | return rc; |
1558 | |
1559 | stop_poll: |
1560 | nfc_dev_err(&dev->interface->dev, "Polling operation has been stopped"); |
1561 | |
1562 | pn533_poll_reset_mod_list(dev); |
1563 | dev->poll_protocols = 0; |
1564 | return rc; |
1565 | } |
1566 | |
1567 | static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev, |
1568 | struct pn533_poll_modulations *mod) |
1569 | { |
1570 | struct sk_buff *skb; |
1571 | |
1572 | skb = pn533_alloc_skb(dev, mod->len); |
1573 | if (!skb) |
1574 | return NULL; |
1575 | |
1576 | memcpy(skb_put(skb, mod->len), &mod->data, mod->len); |
1577 | |
1578 | return skb; |
1579 | } |
1580 | |
1581 | static int pn533_send_poll_frame(struct pn533 *dev) |
1582 | { |
1583 | struct pn533_poll_modulations *mod; |
1584 | struct sk_buff *skb; |
1585 | int rc; |
1586 | u8 cmd_code; |
1587 | |
1588 | mod = dev->poll_mod_active[dev->poll_mod_curr]; |
1589 | |
1590 | nfc_dev_dbg(&dev->interface->dev, "%s mod len %d\n", |
1591 | __func__, mod->len); |
1592 | |
1593 | if (mod->len == 0) { /* Listen mode */ |
1594 | cmd_code = PN533_CMD_TG_INIT_AS_TARGET; |
1595 | skb = pn533_alloc_poll_tg_frame(dev); |
1596 | } else { /* Polling mode */ |
1597 | cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET; |
1598 | skb = pn533_alloc_poll_in_frame(dev, mod); |
1599 | } |
1600 | |
1601 | if (!skb) { |
1602 | nfc_dev_err(&dev->interface->dev, "Failed to allocate skb."); |
1603 | return -ENOMEM; |
1604 | } |
1605 | |
1606 | rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete, |
1607 | NULL); |
1608 | if (rc < 0) { |
1609 | dev_kfree_skb(skb); |
1610 | nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc); |
1611 | } |
1612 | |
1613 | return rc; |
1614 | } |
1615 | |
1616 | static void pn533_wq_poll(struct work_struct *work) |
1617 | { |
1618 | struct pn533 *dev = container_of(work, struct pn533, poll_work); |
1619 | struct pn533_poll_modulations *cur_mod; |
1620 | int rc; |
1621 | |
1622 | cur_mod = dev->poll_mod_active[dev->poll_mod_curr]; |
1623 | |
1624 | nfc_dev_dbg(&dev->interface->dev, |
1625 | "%s cancel_listen %d modulation len %d", |
1626 | __func__, dev->cancel_listen, cur_mod->len); |
1627 | |
1628 | if (dev->cancel_listen == 1) { |
1629 | dev->cancel_listen = 0; |
1630 | usb_kill_urb(dev->in_urb); |
1631 | } |
1632 | |
1633 | rc = pn533_send_poll_frame(dev); |
1634 | if (rc) |
1635 | return; |
1636 | |
1637 | if (cur_mod->len == 0 && dev->poll_mod_count > 1) |
1638 | mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ); |
1639 | |
1640 | return; |
1641 | } |
1642 | |
1643 | static int pn533_start_poll(struct nfc_dev *nfc_dev, |
1644 | u32 im_protocols, u32 tm_protocols) |
1645 | { |
1646 | struct pn533 *dev = nfc_get_drvdata(nfc_dev); |
1647 | |
1648 | nfc_dev_dbg(&dev->interface->dev, |
1649 | "%s: im protocols 0x%x tm protocols 0x%x", |
1650 | __func__, im_protocols, tm_protocols); |
1651 | |
1652 | if (dev->tgt_active_prot) { |
1653 | nfc_dev_err(&dev->interface->dev, |
1654 | "Cannot poll with a target already activated"); |
1655 | return -EBUSY; |
1656 | } |
1657 | |
1658 | if (dev->tgt_mode) { |
1659 | nfc_dev_err(&dev->interface->dev, |
1660 | "Cannot poll while already being activated"); |
1661 | return -EBUSY; |
1662 | } |
1663 | |
1664 | if (tm_protocols) { |
1665 | dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len); |
1666 | if (dev->gb == NULL) |
1667 | tm_protocols = 0; |
1668 | } |
1669 | |
1670 | dev->poll_mod_curr = 0; |
1671 | pn533_poll_create_mod_list(dev, im_protocols, tm_protocols); |
1672 | dev->poll_protocols = im_protocols; |
1673 | dev->listen_protocols = tm_protocols; |
1674 | |
1675 | return pn533_send_poll_frame(dev); |
1676 | } |
1677 | |
1678 | static void pn533_stop_poll(struct nfc_dev *nfc_dev) |
1679 | { |
1680 | struct pn533 *dev = nfc_get_drvdata(nfc_dev); |
1681 | |
1682 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); |
1683 | |
1684 | del_timer(&dev->listen_timer); |
1685 | |
1686 | if (!dev->poll_mod_count) { |
1687 | nfc_dev_dbg(&dev->interface->dev, |
1688 | "Polling operation was not running"); |
1689 | return; |
1690 | } |
1691 | |
1692 | /* An ack will cancel the last issued command (poll) */ |
1693 | pn533_send_ack(dev, GFP_KERNEL); |
1694 | |
1695 | /* prevent pn533_start_poll_complete to issue a new poll meanwhile */ |
1696 | usb_kill_urb(dev->in_urb); |
1697 | |
1698 | pn533_poll_reset_mod_list(dev); |
1699 | } |
1700 | |
1701 | static int pn533_activate_target_nfcdep(struct pn533 *dev) |
1702 | { |
1703 | struct pn533_cmd_activate_response *rsp; |
1704 | u16 gt_len; |
1705 | int rc; |
1706 | |
1707 | struct sk_buff *skb; |
1708 | struct sk_buff *resp; |
1709 | |
1710 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); |
1711 | |
1712 | skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/ |
1713 | if (!skb) |
1714 | return -ENOMEM; |
1715 | |
1716 | *skb_put(skb, sizeof(u8)) = 1; /* TG */ |
1717 | *skb_put(skb, sizeof(u8)) = 0; /* Next */ |
1718 | |
1719 | resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb); |
1720 | if (IS_ERR(resp)) |
1721 | return PTR_ERR(resp); |
1722 | |
1723 | rsp = (struct pn533_cmd_activate_response *)resp->data; |
1724 | rc = rsp->status & PN533_CMD_RET_MASK; |
1725 | if (rc != PN533_CMD_RET_SUCCESS) { |
1726 | dev_kfree_skb(resp); |
1727 | return -EIO; |
1728 | } |
1729 | |
1730 | /* ATR_RES general bytes are located at offset 16 */ |
1731 | gt_len = resp->len - 16; |
1732 | rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len); |
1733 | |
1734 | dev_kfree_skb(resp); |
1735 | return rc; |
1736 | } |
1737 | |
1738 | static int pn533_activate_target(struct nfc_dev *nfc_dev, |
1739 | struct nfc_target *target, u32 protocol) |
1740 | { |
1741 | struct pn533 *dev = nfc_get_drvdata(nfc_dev); |
1742 | int rc; |
1743 | |
1744 | nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__, |
1745 | protocol); |
1746 | |
1747 | if (dev->poll_mod_count) { |
1748 | nfc_dev_err(&dev->interface->dev, |
1749 | "Cannot activate while polling"); |
1750 | return -EBUSY; |
1751 | } |
1752 | |
1753 | if (dev->tgt_active_prot) { |
1754 | nfc_dev_err(&dev->interface->dev, |
1755 | "There is already an active target"); |
1756 | return -EBUSY; |
1757 | } |
1758 | |
1759 | if (!dev->tgt_available_prots) { |
1760 | nfc_dev_err(&dev->interface->dev, |
1761 | "There is no available target to activate"); |
1762 | return -EINVAL; |
1763 | } |
1764 | |
1765 | if (!(dev->tgt_available_prots & (1 << protocol))) { |
1766 | nfc_dev_err(&dev->interface->dev, |
1767 | "Target doesn't support requested proto %u", |
1768 | protocol); |
1769 | return -EINVAL; |
1770 | } |
1771 | |
1772 | if (protocol == NFC_PROTO_NFC_DEP) { |
1773 | rc = pn533_activate_target_nfcdep(dev); |
1774 | if (rc) { |
1775 | nfc_dev_err(&dev->interface->dev, |
1776 | "Activating target with DEP failed %d", rc); |
1777 | return rc; |
1778 | } |
1779 | } |
1780 | |
1781 | dev->tgt_active_prot = protocol; |
1782 | dev->tgt_available_prots = 0; |
1783 | |
1784 | return 0; |
1785 | } |
1786 | |
1787 | static void pn533_deactivate_target(struct nfc_dev *nfc_dev, |
1788 | struct nfc_target *target) |
1789 | { |
1790 | struct pn533 *dev = nfc_get_drvdata(nfc_dev); |
1791 | |
1792 | struct sk_buff *skb; |
1793 | struct sk_buff *resp; |
1794 | |
1795 | int rc; |
1796 | |
1797 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); |
1798 | |
1799 | if (!dev->tgt_active_prot) { |
1800 | nfc_dev_err(&dev->interface->dev, "There is no active target"); |
1801 | return; |
1802 | } |
1803 | |
1804 | dev->tgt_active_prot = 0; |
1805 | skb_queue_purge(&dev->resp_q); |
1806 | |
1807 | skb = pn533_alloc_skb(dev, sizeof(u8)); |
1808 | if (!skb) |
1809 | return; |
1810 | |
1811 | *skb_put(skb, 1) = 1; /* TG*/ |
1812 | |
1813 | resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb); |
1814 | if (IS_ERR(resp)) |
1815 | return; |
1816 | |
1817 | rc = resp->data[0] & PN533_CMD_RET_MASK; |
1818 | if (rc != PN533_CMD_RET_SUCCESS) |
1819 | nfc_dev_err(&dev->interface->dev, |
1820 | "Error 0x%x when releasing the target", rc); |
1821 | |
1822 | dev_kfree_skb(resp); |
1823 | return; |
1824 | } |
1825 | |
1826 | |
1827 | static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg, |
1828 | struct sk_buff *resp) |
1829 | { |
1830 | struct pn533_cmd_jump_dep_response *rsp; |
1831 | u8 target_gt_len; |
1832 | int rc; |
1833 | u8 active = *(u8 *)arg; |
1834 | |
1835 | kfree(arg); |
1836 | |
1837 | if (IS_ERR(resp)) |
1838 | return PTR_ERR(resp); |
1839 | |
1840 | if (dev->tgt_available_prots && |
1841 | !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) { |
1842 | nfc_dev_err(&dev->interface->dev, |
1843 | "The target does not support DEP"); |
1844 | rc = -EINVAL; |
1845 | goto error; |
1846 | } |
1847 | |
1848 | rsp = (struct pn533_cmd_jump_dep_response *)resp->data; |
1849 | |
1850 | rc = rsp->status & PN533_CMD_RET_MASK; |
1851 | if (rc != PN533_CMD_RET_SUCCESS) { |
1852 | nfc_dev_err(&dev->interface->dev, |
1853 | "Bringing DEP link up failed %d", rc); |
1854 | goto error; |
1855 | } |
1856 | |
1857 | if (!dev->tgt_available_prots) { |
1858 | struct nfc_target nfc_target; |
1859 | |
1860 | nfc_dev_dbg(&dev->interface->dev, "Creating new target"); |
1861 | |
1862 | nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK; |
1863 | nfc_target.nfcid1_len = 10; |
1864 | memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len); |
1865 | rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1); |
1866 | if (rc) |
1867 | goto error; |
1868 | |
1869 | dev->tgt_available_prots = 0; |
1870 | } |
1871 | |
1872 | dev->tgt_active_prot = NFC_PROTO_NFC_DEP; |
1873 | |
1874 | /* ATR_RES general bytes are located at offset 17 */ |
1875 | target_gt_len = resp->len - 17; |
1876 | rc = nfc_set_remote_general_bytes(dev->nfc_dev, |
1877 | rsp->gt, target_gt_len); |
1878 | if (rc == 0) |
1879 | rc = nfc_dep_link_is_up(dev->nfc_dev, |
1880 | dev->nfc_dev->targets[0].idx, |
1881 | !active, NFC_RF_INITIATOR); |
1882 | |
1883 | error: |
1884 | dev_kfree_skb(resp); |
1885 | return rc; |
1886 | } |
1887 | |
1888 | static int pn533_mod_to_baud(struct pn533 *dev) |
1889 | { |
1890 | switch (dev->poll_mod_curr) { |
1891 | case PN533_POLL_MOD_106KBPS_A: |
1892 | return 0; |
1893 | case PN533_POLL_MOD_212KBPS_FELICA: |
1894 | return 1; |
1895 | case PN533_POLL_MOD_424KBPS_FELICA: |
1896 | return 2; |
1897 | default: |
1898 | return -EINVAL; |
1899 | } |
1900 | } |
1901 | |
1902 | #define PASSIVE_DATA_LEN 5 |
1903 | static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target, |
1904 | u8 comm_mode, u8 *gb, size_t gb_len) |
1905 | { |
1906 | struct pn533 *dev = nfc_get_drvdata(nfc_dev); |
1907 | struct sk_buff *skb; |
1908 | int rc, baud, skb_len; |
1909 | u8 *next, *arg; |
1910 | |
1911 | u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3}; |
1912 | |
1913 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); |
1914 | |
1915 | if (dev->poll_mod_count) { |
1916 | nfc_dev_err(&dev->interface->dev, |
1917 | "Cannot bring the DEP link up while polling"); |
1918 | return -EBUSY; |
1919 | } |
1920 | |
1921 | if (dev->tgt_active_prot) { |
1922 | nfc_dev_err(&dev->interface->dev, |
1923 | "There is already an active target"); |
1924 | return -EBUSY; |
1925 | } |
1926 | |
1927 | baud = pn533_mod_to_baud(dev); |
1928 | if (baud < 0) { |
1929 | nfc_dev_err(&dev->interface->dev, |
1930 | "Invalid curr modulation %d", dev->poll_mod_curr); |
1931 | return baud; |
1932 | } |
1933 | |
1934 | skb_len = 3 + gb_len; /* ActPass + BR + Next */ |
1935 | if (comm_mode == NFC_COMM_PASSIVE) |
1936 | skb_len += PASSIVE_DATA_LEN; |
1937 | |
1938 | skb = pn533_alloc_skb(dev, skb_len); |
1939 | if (!skb) |
1940 | return -ENOMEM; |
1941 | |
1942 | *skb_put(skb, 1) = !comm_mode; /* ActPass */ |
1943 | *skb_put(skb, 1) = baud; /* Baud rate */ |
1944 | |
1945 | next = skb_put(skb, 1); /* Next */ |
1946 | *next = 0; |
1947 | |
1948 | if (comm_mode == NFC_COMM_PASSIVE && baud > 0) { |
1949 | memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data, |
1950 | PASSIVE_DATA_LEN); |
1951 | *next |= 1; |
1952 | } |
1953 | |
1954 | if (gb != NULL && gb_len > 0) { |
1955 | memcpy(skb_put(skb, gb_len), gb, gb_len); |
1956 | *next |= 4; /* We have some Gi */ |
1957 | } else { |
1958 | *next = 0; |
1959 | } |
1960 | |
1961 | arg = kmalloc(sizeof(*arg), GFP_KERNEL); |
1962 | if (!arg) { |
1963 | dev_kfree_skb(skb); |
1964 | return -ENOMEM; |
1965 | } |
1966 | |
1967 | *arg = !comm_mode; |
1968 | |
1969 | rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb, |
1970 | pn533_in_dep_link_up_complete, arg); |
1971 | |
1972 | if (rc < 0) { |
1973 | dev_kfree_skb(skb); |
1974 | kfree(arg); |
1975 | } |
1976 | |
1977 | return rc; |
1978 | } |
1979 | |
1980 | static int pn533_dep_link_down(struct nfc_dev *nfc_dev) |
1981 | { |
1982 | struct pn533 *dev = nfc_get_drvdata(nfc_dev); |
1983 | |
1984 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); |
1985 | |
1986 | pn533_poll_reset_mod_list(dev); |
1987 | |
1988 | if (dev->tgt_mode || dev->tgt_active_prot) { |
1989 | pn533_send_ack(dev, GFP_KERNEL); |
1990 | usb_kill_urb(dev->in_urb); |
1991 | } |
1992 | |
1993 | dev->tgt_active_prot = 0; |
1994 | dev->tgt_mode = 0; |
1995 | |
1996 | skb_queue_purge(&dev->resp_q); |
1997 | |
1998 | return 0; |
1999 | } |
2000 | |
2001 | struct pn533_data_exchange_arg { |
2002 | data_exchange_cb_t cb; |
2003 | void *cb_context; |
2004 | }; |
2005 | |
2006 | static struct sk_buff *pn533_build_response(struct pn533 *dev) |
2007 | { |
2008 | struct sk_buff *skb, *tmp, *t; |
2009 | unsigned int skb_len = 0, tmp_len = 0; |
2010 | |
2011 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); |
2012 | |
2013 | if (skb_queue_empty(&dev->resp_q)) |
2014 | return NULL; |
2015 | |
2016 | if (skb_queue_len(&dev->resp_q) == 1) { |
2017 | skb = skb_dequeue(&dev->resp_q); |
2018 | goto out; |
2019 | } |
2020 | |
2021 | skb_queue_walk_safe(&dev->resp_q, tmp, t) |
2022 | skb_len += tmp->len; |
2023 | |
2024 | nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n", |
2025 | __func__, skb_len); |
2026 | |
2027 | skb = alloc_skb(skb_len, GFP_KERNEL); |
2028 | if (skb == NULL) |
2029 | goto out; |
2030 | |
2031 | skb_put(skb, skb_len); |
2032 | |
2033 | skb_queue_walk_safe(&dev->resp_q, tmp, t) { |
2034 | memcpy(skb->data + tmp_len, tmp->data, tmp->len); |
2035 | tmp_len += tmp->len; |
2036 | } |
2037 | |
2038 | out: |
2039 | skb_queue_purge(&dev->resp_q); |
2040 | |
2041 | return skb; |
2042 | } |
2043 | |
2044 | static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg, |
2045 | struct sk_buff *resp) |
2046 | { |
2047 | struct pn533_data_exchange_arg *arg = _arg; |
2048 | struct sk_buff *skb; |
2049 | int rc = 0; |
2050 | u8 status, ret, mi; |
2051 | |
2052 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); |
2053 | |
2054 | if (IS_ERR(resp)) { |
2055 | rc = PTR_ERR(resp); |
2056 | goto _error; |
2057 | } |
2058 | |
2059 | status = resp->data[0]; |
2060 | ret = status & PN533_CMD_RET_MASK; |
2061 | mi = status & PN533_CMD_MI_MASK; |
2062 | |
2063 | skb_pull(resp, sizeof(status)); |
2064 | |
2065 | if (ret != PN533_CMD_RET_SUCCESS) { |
2066 | nfc_dev_err(&dev->interface->dev, |
2067 | "PN533 reported error %d when exchanging data", |
2068 | ret); |
2069 | rc = -EIO; |
2070 | goto error; |
2071 | } |
2072 | |
2073 | skb_queue_tail(&dev->resp_q, resp); |
2074 | |
2075 | if (mi) { |
2076 | dev->cmd_complete_mi_arg = arg; |
2077 | queue_work(dev->wq, &dev->mi_work); |
2078 | return -EINPROGRESS; |
2079 | } |
2080 | |
2081 | skb = pn533_build_response(dev); |
2082 | if (!skb) |
2083 | goto error; |
2084 | |
2085 | arg->cb(arg->cb_context, skb, 0); |
2086 | kfree(arg); |
2087 | return 0; |
2088 | |
2089 | error: |
2090 | dev_kfree_skb(resp); |
2091 | _error: |
2092 | skb_queue_purge(&dev->resp_q); |
2093 | arg->cb(arg->cb_context, NULL, rc); |
2094 | kfree(arg); |
2095 | return rc; |
2096 | } |
2097 | |
2098 | static int pn533_transceive(struct nfc_dev *nfc_dev, |
2099 | struct nfc_target *target, struct sk_buff *skb, |
2100 | data_exchange_cb_t cb, void *cb_context) |
2101 | { |
2102 | struct pn533 *dev = nfc_get_drvdata(nfc_dev); |
2103 | struct pn533_data_exchange_arg *arg = NULL; |
2104 | int rc; |
2105 | |
2106 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); |
2107 | |
2108 | if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) { |
2109 | /* TODO: Implement support to multi-part data exchange */ |
2110 | nfc_dev_err(&dev->interface->dev, |
2111 | "Data length greater than the max allowed: %d", |
2112 | PN533_CMD_DATAEXCH_DATA_MAXLEN); |
2113 | rc = -ENOSYS; |
2114 | goto error; |
2115 | } |
2116 | |
2117 | if (!dev->tgt_active_prot) { |
2118 | nfc_dev_err(&dev->interface->dev, |
2119 | "Can't exchange data if there is no active target"); |
2120 | rc = -EINVAL; |
2121 | goto error; |
2122 | } |
2123 | |
2124 | arg = kmalloc(sizeof(*arg), GFP_KERNEL); |
2125 | if (!arg) { |
2126 | rc = -ENOMEM; |
2127 | goto error; |
2128 | } |
2129 | |
2130 | arg->cb = cb; |
2131 | arg->cb_context = cb_context; |
2132 | |
2133 | switch (dev->device_type) { |
2134 | case PN533_DEVICE_PASORI: |
2135 | if (dev->tgt_active_prot == NFC_PROTO_FELICA) { |
2136 | rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU, |
2137 | skb, |
2138 | pn533_data_exchange_complete, |
2139 | arg); |
2140 | |
2141 | break; |
2142 | } |
2143 | default: |
2144 | *skb_push(skb, sizeof(u8)) = 1; /*TG*/ |
2145 | |
2146 | rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE, |
2147 | skb, pn533_data_exchange_complete, |
2148 | arg); |
2149 | |
2150 | break; |
2151 | } |
2152 | |
2153 | if (rc < 0) /* rc from send_async */ |
2154 | goto error; |
2155 | |
2156 | return 0; |
2157 | |
2158 | error: |
2159 | kfree(arg); |
2160 | dev_kfree_skb(skb); |
2161 | return rc; |
2162 | } |
2163 | |
2164 | static int pn533_tm_send_complete(struct pn533 *dev, void *arg, |
2165 | struct sk_buff *resp) |
2166 | { |
2167 | u8 status; |
2168 | |
2169 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); |
2170 | |
2171 | if (IS_ERR(resp)) |
2172 | return PTR_ERR(resp); |
2173 | |
2174 | status = resp->data[0]; |
2175 | |
2176 | dev_kfree_skb(resp); |
2177 | |
2178 | if (status != 0) { |
2179 | nfc_tm_deactivated(dev->nfc_dev); |
2180 | |
2181 | dev->tgt_mode = 0; |
2182 | |
2183 | return 0; |
2184 | } |
2185 | |
2186 | queue_work(dev->wq, &dev->tg_work); |
2187 | |
2188 | return 0; |
2189 | } |
2190 | |
2191 | static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb) |
2192 | { |
2193 | struct pn533 *dev = nfc_get_drvdata(nfc_dev); |
2194 | int rc; |
2195 | |
2196 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); |
2197 | |
2198 | if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) { |
2199 | nfc_dev_err(&dev->interface->dev, |
2200 | "Data length greater than the max allowed: %d", |
2201 | PN533_CMD_DATAEXCH_DATA_MAXLEN); |
2202 | return -ENOSYS; |
2203 | } |
2204 | |
2205 | rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb, |
2206 | pn533_tm_send_complete, NULL); |
2207 | if (rc < 0) |
2208 | dev_kfree_skb(skb); |
2209 | |
2210 | return rc; |
2211 | } |
2212 | |
2213 | static void pn533_wq_mi_recv(struct work_struct *work) |
2214 | { |
2215 | struct pn533 *dev = container_of(work, struct pn533, mi_work); |
2216 | |
2217 | struct sk_buff *skb; |
2218 | int rc; |
2219 | |
2220 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); |
2221 | |
2222 | skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN); |
2223 | if (!skb) |
2224 | goto error; |
2225 | |
2226 | switch (dev->device_type) { |
2227 | case PN533_DEVICE_PASORI: |
2228 | if (dev->tgt_active_prot == NFC_PROTO_FELICA) { |
2229 | rc = pn533_send_cmd_direct_async(dev, |
2230 | PN533_CMD_IN_COMM_THRU, |
2231 | skb, |
2232 | pn533_data_exchange_complete, |
2233 | dev->cmd_complete_mi_arg); |
2234 | |
2235 | break; |
2236 | } |
2237 | default: |
2238 | *skb_put(skb, sizeof(u8)) = 1; /*TG*/ |
2239 | |
2240 | rc = pn533_send_cmd_direct_async(dev, |
2241 | PN533_CMD_IN_DATA_EXCHANGE, |
2242 | skb, |
2243 | pn533_data_exchange_complete, |
2244 | dev->cmd_complete_mi_arg); |
2245 | |
2246 | break; |
2247 | } |
2248 | |
2249 | if (rc == 0) /* success */ |
2250 | return; |
2251 | |
2252 | nfc_dev_err(&dev->interface->dev, |
2253 | "Error %d when trying to perform data_exchange", rc); |
2254 | |
2255 | dev_kfree_skb(skb); |
2256 | kfree(dev->cmd_complete_arg); |
2257 | |
2258 | error: |
2259 | pn533_send_ack(dev, GFP_KERNEL); |
2260 | queue_work(dev->wq, &dev->cmd_work); |
2261 | } |
2262 | |
2263 | static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata, |
2264 | u8 cfgdata_len) |
2265 | { |
2266 | struct sk_buff *skb; |
2267 | struct sk_buff *resp; |
2268 | |
2269 | int skb_len; |
2270 | |
2271 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); |
2272 | |
2273 | skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */ |
2274 | |
2275 | skb = pn533_alloc_skb(dev, skb_len); |
2276 | if (!skb) |
2277 | return -ENOMEM; |
2278 | |
2279 | *skb_put(skb, sizeof(cfgitem)) = cfgitem; |
2280 | memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len); |
2281 | |
2282 | resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb); |
2283 | if (IS_ERR(resp)) |
2284 | return PTR_ERR(resp); |
2285 | |
2286 | dev_kfree_skb(resp); |
2287 | return 0; |
2288 | } |
2289 | |
2290 | static int pn533_get_firmware_version(struct pn533 *dev, |
2291 | struct pn533_fw_version *fv) |
2292 | { |
2293 | struct sk_buff *skb; |
2294 | struct sk_buff *resp; |
2295 | |
2296 | skb = pn533_alloc_skb(dev, 0); |
2297 | if (!skb) |
2298 | return -ENOMEM; |
2299 | |
2300 | resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb); |
2301 | if (IS_ERR(resp)) |
2302 | return PTR_ERR(resp); |
2303 | |
2304 | fv->ic = resp->data[0]; |
2305 | fv->ver = resp->data[1]; |
2306 | fv->rev = resp->data[2]; |
2307 | fv->support = resp->data[3]; |
2308 | |
2309 | dev_kfree_skb(resp); |
2310 | return 0; |
2311 | } |
2312 | |
2313 | static int pn533_fw_reset(struct pn533 *dev) |
2314 | { |
2315 | struct sk_buff *skb; |
2316 | struct sk_buff *resp; |
2317 | |
2318 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); |
2319 | |
2320 | skb = pn533_alloc_skb(dev, sizeof(u8)); |
2321 | if (!skb) |
2322 | return -ENOMEM; |
2323 | |
2324 | *skb_put(skb, sizeof(u8)) = 0x1; |
2325 | |
2326 | resp = pn533_send_cmd_sync(dev, 0x18, skb); |
2327 | if (IS_ERR(resp)) |
2328 | return PTR_ERR(resp); |
2329 | |
2330 | dev_kfree_skb(resp); |
2331 | |
2332 | return 0; |
2333 | } |
2334 | |
2335 | static struct nfc_ops pn533_nfc_ops = { |
2336 | .dev_up = NULL, |
2337 | .dev_down = NULL, |
2338 | .dep_link_up = pn533_dep_link_up, |
2339 | .dep_link_down = pn533_dep_link_down, |
2340 | .start_poll = pn533_start_poll, |
2341 | .stop_poll = pn533_stop_poll, |
2342 | .activate_target = pn533_activate_target, |
2343 | .deactivate_target = pn533_deactivate_target, |
2344 | .im_transceive = pn533_transceive, |
2345 | .tm_send = pn533_tm_send, |
2346 | }; |
2347 | |
2348 | static int pn533_setup(struct pn533 *dev) |
2349 | { |
2350 | struct pn533_config_max_retries max_retries; |
2351 | struct pn533_config_timing timing; |
2352 | u8 pasori_cfg[3] = {0x08, 0x01, 0x08}; |
2353 | int rc; |
2354 | |
2355 | switch (dev->device_type) { |
2356 | case PN533_DEVICE_STD: |
2357 | max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS; |
2358 | max_retries.mx_rty_psl = 2; |
2359 | max_retries.mx_rty_passive_act = |
2360 | PN533_CONFIG_MAX_RETRIES_NO_RETRY; |
2361 | |
2362 | timing.rfu = PN533_CONFIG_TIMING_102; |
2363 | timing.atr_res_timeout = PN533_CONFIG_TIMING_204; |
2364 | timing.dep_timeout = PN533_CONFIG_TIMING_409; |
2365 | |
2366 | break; |
2367 | |
2368 | case PN533_DEVICE_PASORI: |
2369 | max_retries.mx_rty_atr = 0x2; |
2370 | max_retries.mx_rty_psl = 0x1; |
2371 | max_retries.mx_rty_passive_act = |
2372 | PN533_CONFIG_MAX_RETRIES_NO_RETRY; |
2373 | |
2374 | timing.rfu = PN533_CONFIG_TIMING_102; |
2375 | timing.atr_res_timeout = PN533_CONFIG_TIMING_102; |
2376 | timing.dep_timeout = PN533_CONFIG_TIMING_204; |
2377 | |
2378 | break; |
2379 | |
2380 | default: |
2381 | nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n", |
2382 | dev->device_type); |
2383 | return -EINVAL; |
2384 | } |
2385 | |
2386 | rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES, |
2387 | (u8 *)&max_retries, sizeof(max_retries)); |
2388 | if (rc) { |
2389 | nfc_dev_err(&dev->interface->dev, |
2390 | "Error on setting MAX_RETRIES config"); |
2391 | return rc; |
2392 | } |
2393 | |
2394 | |
2395 | rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING, |
2396 | (u8 *)&timing, sizeof(timing)); |
2397 | if (rc) { |
2398 | nfc_dev_err(&dev->interface->dev, |
2399 | "Error on setting RF timings"); |
2400 | return rc; |
2401 | } |
2402 | |
2403 | switch (dev->device_type) { |
2404 | case PN533_DEVICE_STD: |
2405 | break; |
2406 | |
2407 | case PN533_DEVICE_PASORI: |
2408 | pn533_fw_reset(dev); |
2409 | |
2410 | rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI, |
2411 | pasori_cfg, 3); |
2412 | if (rc) { |
2413 | nfc_dev_err(&dev->interface->dev, |
2414 | "Error while settings PASORI config"); |
2415 | return rc; |
2416 | } |
2417 | |
2418 | pn533_fw_reset(dev); |
2419 | |
2420 | break; |
2421 | } |
2422 | |
2423 | return 0; |
2424 | } |
2425 | |
2426 | static int pn533_probe(struct usb_interface *interface, |
2427 | const struct usb_device_id *id) |
2428 | { |
2429 | struct pn533_fw_version fw_ver; |
2430 | struct pn533 *dev; |
2431 | struct usb_host_interface *iface_desc; |
2432 | struct usb_endpoint_descriptor *endpoint; |
2433 | int in_endpoint = 0; |
2434 | int out_endpoint = 0; |
2435 | int rc = -ENOMEM; |
2436 | int i; |
2437 | u32 protocols; |
2438 | |
2439 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
2440 | if (!dev) |
2441 | return -ENOMEM; |
2442 | |
2443 | dev->udev = usb_get_dev(interface_to_usbdev(interface)); |
2444 | dev->interface = interface; |
2445 | mutex_init(&dev->cmd_lock); |
2446 | |
2447 | iface_desc = interface->cur_altsetting; |
2448 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { |
2449 | endpoint = &iface_desc->endpoint[i].desc; |
2450 | |
2451 | if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint)) |
2452 | in_endpoint = endpoint->bEndpointAddress; |
2453 | |
2454 | if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint)) |
2455 | out_endpoint = endpoint->bEndpointAddress; |
2456 | } |
2457 | |
2458 | if (!in_endpoint || !out_endpoint) { |
2459 | nfc_dev_err(&interface->dev, |
2460 | "Could not find bulk-in or bulk-out endpoint"); |
2461 | rc = -ENODEV; |
2462 | goto error; |
2463 | } |
2464 | |
2465 | dev->in_urb = usb_alloc_urb(0, GFP_KERNEL); |
2466 | dev->out_urb = usb_alloc_urb(0, GFP_KERNEL); |
2467 | |
2468 | if (!dev->in_urb || !dev->out_urb) |
2469 | goto error; |
2470 | |
2471 | usb_fill_bulk_urb(dev->in_urb, dev->udev, |
2472 | usb_rcvbulkpipe(dev->udev, in_endpoint), |
2473 | NULL, 0, NULL, dev); |
2474 | usb_fill_bulk_urb(dev->out_urb, dev->udev, |
2475 | usb_sndbulkpipe(dev->udev, out_endpoint), |
2476 | NULL, 0, pn533_send_complete, dev); |
2477 | |
2478 | INIT_WORK(&dev->cmd_work, pn533_wq_cmd); |
2479 | INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete); |
2480 | INIT_WORK(&dev->mi_work, pn533_wq_mi_recv); |
2481 | INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data); |
2482 | INIT_WORK(&dev->poll_work, pn533_wq_poll); |
2483 | dev->wq = alloc_ordered_workqueue("pn533", 0); |
2484 | if (dev->wq == NULL) |
2485 | goto error; |
2486 | |
2487 | init_timer(&dev->listen_timer); |
2488 | dev->listen_timer.data = (unsigned long) dev; |
2489 | dev->listen_timer.function = pn533_listen_mode_timer; |
2490 | |
2491 | skb_queue_head_init(&dev->resp_q); |
2492 | |
2493 | INIT_LIST_HEAD(&dev->cmd_queue); |
2494 | |
2495 | usb_set_intfdata(interface, dev); |
2496 | |
2497 | dev->ops = &pn533_std_frame_ops; |
2498 | |
2499 | dev->device_type = id->driver_info; |
2500 | switch (dev->device_type) { |
2501 | case PN533_DEVICE_STD: |
2502 | protocols = PN533_ALL_PROTOCOLS; |
2503 | break; |
2504 | |
2505 | case PN533_DEVICE_PASORI: |
2506 | protocols = PN533_NO_TYPE_B_PROTOCOLS; |
2507 | break; |
2508 | |
2509 | default: |
2510 | nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n", |
2511 | dev->device_type); |
2512 | rc = -EINVAL; |
2513 | goto destroy_wq; |
2514 | } |
2515 | |
2516 | memset(&fw_ver, 0, sizeof(fw_ver)); |
2517 | rc = pn533_get_firmware_version(dev, &fw_ver); |
2518 | if (rc < 0) |
2519 | goto destroy_wq; |
2520 | |
2521 | nfc_dev_info(&dev->interface->dev, |
2522 | "NXP PN533 firmware ver %d.%d now attached", |
2523 | fw_ver.ver, fw_ver.rev); |
2524 | |
2525 | |
2526 | dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols, |
2527 | NFC_SE_NONE, |
2528 | dev->ops->tx_header_len + |
2529 | PN533_CMD_DATAEXCH_HEAD_LEN, |
2530 | dev->ops->tx_tail_len); |
2531 | if (!dev->nfc_dev) |
2532 | goto destroy_wq; |
2533 | |
2534 | nfc_set_parent_dev(dev->nfc_dev, &interface->dev); |
2535 | nfc_set_drvdata(dev->nfc_dev, dev); |
2536 | |
2537 | rc = nfc_register_device(dev->nfc_dev); |
2538 | if (rc) |
2539 | goto free_nfc_dev; |
2540 | |
2541 | rc = pn533_setup(dev); |
2542 | if (rc) |
2543 | goto unregister_nfc_dev; |
2544 | |
2545 | return 0; |
2546 | |
2547 | unregister_nfc_dev: |
2548 | nfc_unregister_device(dev->nfc_dev); |
2549 | |
2550 | free_nfc_dev: |
2551 | nfc_free_device(dev->nfc_dev); |
2552 | |
2553 | destroy_wq: |
2554 | destroy_workqueue(dev->wq); |
2555 | error: |
2556 | usb_free_urb(dev->in_urb); |
2557 | usb_free_urb(dev->out_urb); |
2558 | kfree(dev); |
2559 | return rc; |
2560 | } |
2561 | |
2562 | static void pn533_disconnect(struct usb_interface *interface) |
2563 | { |
2564 | struct pn533 *dev; |
2565 | struct pn533_cmd *cmd, *n; |
2566 | |
2567 | dev = usb_get_intfdata(interface); |
2568 | usb_set_intfdata(interface, NULL); |
2569 | |
2570 | nfc_unregister_device(dev->nfc_dev); |
2571 | nfc_free_device(dev->nfc_dev); |
2572 | |
2573 | usb_kill_urb(dev->in_urb); |
2574 | usb_kill_urb(dev->out_urb); |
2575 | |
2576 | destroy_workqueue(dev->wq); |
2577 | |
2578 | skb_queue_purge(&dev->resp_q); |
2579 | |
2580 | del_timer(&dev->listen_timer); |
2581 | |
2582 | list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) { |
2583 | list_del(&cmd->queue); |
2584 | kfree(cmd); |
2585 | } |
2586 | |
2587 | usb_free_urb(dev->in_urb); |
2588 | usb_free_urb(dev->out_urb); |
2589 | kfree(dev); |
2590 | |
2591 | nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected"); |
2592 | } |
2593 | |
2594 | static struct usb_driver pn533_driver = { |
2595 | .name = "pn533", |
2596 | .probe = pn533_probe, |
2597 | .disconnect = pn533_disconnect, |
2598 | .id_table = pn533_table, |
2599 | }; |
2600 | |
2601 | module_usb_driver(pn533_driver); |
2602 | |
2603 | MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>," |
2604 | " Aloisio Almeida Jr <aloisio.almeida@openbossa.org>"); |
2605 | MODULE_DESCRIPTION("PN533 usb driver ver " VERSION); |
2606 | MODULE_VERSION(VERSION); |
2607 | MODULE_LICENSE("GPL"); |
2608 |
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Tags:
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