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c46ee386 AAJ |
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> | |
55eb94f9 | 31 | #include <net/nfc/nfc.h> |
c46ee386 AAJ |
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 | static const struct usb_device_id pn533_table[] = { | |
42 | { USB_DEVICE(PN533_VENDOR_ID, PN533_PRODUCT_ID) }, | |
43 | { USB_DEVICE(SCM_VENDOR_ID, SCL3711_PRODUCT_ID) }, | |
44 | { } | |
45 | }; | |
46 | MODULE_DEVICE_TABLE(usb, pn533_table); | |
47 | ||
48 | /* frame definitions */ | |
49 | #define PN533_FRAME_TAIL_SIZE 2 | |
50 | #define PN533_FRAME_SIZE(f) (sizeof(struct pn533_frame) + f->datalen + \ | |
51 | PN533_FRAME_TAIL_SIZE) | |
52 | #define PN533_FRAME_ACK_SIZE (sizeof(struct pn533_frame) + 1) | |
53 | #define PN533_FRAME_CHECKSUM(f) (f->data[f->datalen]) | |
54 | #define PN533_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1]) | |
55 | ||
56 | /* start of frame */ | |
57 | #define PN533_SOF 0x00FF | |
58 | ||
59 | /* frame identifier: in/out/error */ | |
60 | #define PN533_FRAME_IDENTIFIER(f) (f->data[0]) | |
61 | #define PN533_DIR_OUT 0xD4 | |
62 | #define PN533_DIR_IN 0xD5 | |
63 | ||
64 | /* PN533 Commands */ | |
65 | #define PN533_FRAME_CMD(f) (f->data[1]) | |
66 | #define PN533_FRAME_CMD_PARAMS_PTR(f) (&f->data[2]) | |
67 | #define PN533_FRAME_CMD_PARAMS_LEN(f) (f->datalen - 2) | |
68 | ||
69 | #define PN533_CMD_GET_FIRMWARE_VERSION 0x02 | |
70 | #define PN533_CMD_RF_CONFIGURATION 0x32 | |
71 | #define PN533_CMD_IN_DATA_EXCHANGE 0x40 | |
72 | #define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A | |
73 | #define PN533_CMD_IN_ATR 0x50 | |
74 | #define PN533_CMD_IN_RELEASE 0x52 | |
361f3cb7 | 75 | #define PN533_CMD_IN_JUMP_FOR_DEP 0x56 |
c46ee386 | 76 | |
ad3823ce SO |
77 | #define PN533_CMD_TG_INIT_AS_TARGET 0x8c |
78 | ||
c46ee386 AAJ |
79 | #define PN533_CMD_RESPONSE(cmd) (cmd + 1) |
80 | ||
81 | /* PN533 Return codes */ | |
82 | #define PN533_CMD_RET_MASK 0x3F | |
83 | #define PN533_CMD_MI_MASK 0x40 | |
84 | #define PN533_CMD_RET_SUCCESS 0x00 | |
85 | ||
86 | struct pn533; | |
87 | ||
88 | typedef int (*pn533_cmd_complete_t) (struct pn533 *dev, void *arg, | |
89 | u8 *params, int params_len); | |
90 | ||
91 | /* structs for pn533 commands */ | |
92 | ||
93 | /* PN533_CMD_GET_FIRMWARE_VERSION */ | |
94 | struct pn533_fw_version { | |
95 | u8 ic; | |
96 | u8 ver; | |
97 | u8 rev; | |
98 | u8 support; | |
99 | }; | |
100 | ||
101 | /* PN533_CMD_RF_CONFIGURATION */ | |
102 | #define PN533_CFGITEM_MAX_RETRIES 0x05 | |
103 | ||
104 | #define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00 | |
105 | #define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF | |
106 | ||
107 | struct pn533_config_max_retries { | |
108 | u8 mx_rty_atr; | |
109 | u8 mx_rty_psl; | |
110 | u8 mx_rty_passive_act; | |
111 | } __packed; | |
112 | ||
113 | /* PN533_CMD_IN_LIST_PASSIVE_TARGET */ | |
114 | ||
115 | /* felica commands opcode */ | |
116 | #define PN533_FELICA_OPC_SENSF_REQ 0 | |
117 | #define PN533_FELICA_OPC_SENSF_RES 1 | |
118 | /* felica SENSF_REQ parameters */ | |
119 | #define PN533_FELICA_SENSF_SC_ALL 0xFFFF | |
120 | #define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0 | |
121 | #define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1 | |
122 | #define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2 | |
123 | ||
124 | /* type B initiator_data values */ | |
125 | #define PN533_TYPE_B_AFI_ALL_FAMILIES 0 | |
126 | #define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0 | |
127 | #define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1 | |
128 | ||
129 | union pn533_cmd_poll_initdata { | |
130 | struct { | |
131 | u8 afi; | |
132 | u8 polling_method; | |
133 | } __packed type_b; | |
134 | struct { | |
135 | u8 opcode; | |
136 | __be16 sc; | |
137 | u8 rc; | |
138 | u8 tsn; | |
139 | } __packed felica; | |
140 | }; | |
141 | ||
142 | /* Poll modulations */ | |
143 | enum { | |
144 | PN533_POLL_MOD_106KBPS_A, | |
145 | PN533_POLL_MOD_212KBPS_FELICA, | |
146 | PN533_POLL_MOD_424KBPS_FELICA, | |
147 | PN533_POLL_MOD_106KBPS_JEWEL, | |
148 | PN533_POLL_MOD_847KBPS_B, | |
149 | ||
150 | __PN533_POLL_MOD_AFTER_LAST, | |
151 | }; | |
152 | #define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1) | |
153 | ||
154 | struct pn533_poll_modulations { | |
155 | struct { | |
156 | u8 maxtg; | |
157 | u8 brty; | |
158 | union pn533_cmd_poll_initdata initiator_data; | |
159 | } __packed data; | |
160 | u8 len; | |
161 | }; | |
162 | ||
163 | const struct pn533_poll_modulations poll_mod[] = { | |
164 | [PN533_POLL_MOD_106KBPS_A] = { | |
165 | .data = { | |
166 | .maxtg = 1, | |
167 | .brty = 0, | |
168 | }, | |
169 | .len = 2, | |
170 | }, | |
171 | [PN533_POLL_MOD_212KBPS_FELICA] = { | |
172 | .data = { | |
173 | .maxtg = 1, | |
174 | .brty = 1, | |
175 | .initiator_data.felica = { | |
176 | .opcode = PN533_FELICA_OPC_SENSF_REQ, | |
177 | .sc = PN533_FELICA_SENSF_SC_ALL, | |
178 | .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE, | |
179 | .tsn = 0, | |
180 | }, | |
181 | }, | |
182 | .len = 7, | |
183 | }, | |
184 | [PN533_POLL_MOD_424KBPS_FELICA] = { | |
185 | .data = { | |
186 | .maxtg = 1, | |
187 | .brty = 2, | |
188 | .initiator_data.felica = { | |
189 | .opcode = PN533_FELICA_OPC_SENSF_REQ, | |
190 | .sc = PN533_FELICA_SENSF_SC_ALL, | |
191 | .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE, | |
192 | .tsn = 0, | |
193 | }, | |
194 | }, | |
195 | .len = 7, | |
196 | }, | |
197 | [PN533_POLL_MOD_106KBPS_JEWEL] = { | |
198 | .data = { | |
199 | .maxtg = 1, | |
200 | .brty = 4, | |
201 | }, | |
202 | .len = 2, | |
203 | }, | |
204 | [PN533_POLL_MOD_847KBPS_B] = { | |
205 | .data = { | |
206 | .maxtg = 1, | |
207 | .brty = 8, | |
208 | .initiator_data.type_b = { | |
209 | .afi = PN533_TYPE_B_AFI_ALL_FAMILIES, | |
210 | .polling_method = | |
211 | PN533_TYPE_B_POLL_METHOD_TIMESLOT, | |
212 | }, | |
213 | }, | |
214 | .len = 3, | |
215 | }, | |
216 | }; | |
217 | ||
218 | /* PN533_CMD_IN_ATR */ | |
219 | ||
220 | struct pn533_cmd_activate_param { | |
221 | u8 tg; | |
222 | u8 next; | |
223 | } __packed; | |
224 | ||
225 | struct pn533_cmd_activate_response { | |
226 | u8 status; | |
227 | u8 nfcid3t[10]; | |
228 | u8 didt; | |
229 | u8 bst; | |
230 | u8 brt; | |
231 | u8 to; | |
232 | u8 ppt; | |
233 | /* optional */ | |
234 | u8 gt[]; | |
235 | } __packed; | |
236 | ||
361f3cb7 SO |
237 | /* PN533_CMD_IN_JUMP_FOR_DEP */ |
238 | struct pn533_cmd_jump_dep { | |
239 | u8 active; | |
240 | u8 baud; | |
241 | u8 next; | |
242 | u8 gt[]; | |
243 | } __packed; | |
244 | ||
245 | struct pn533_cmd_jump_dep_response { | |
246 | u8 status; | |
247 | u8 tg; | |
248 | u8 nfcid3t[10]; | |
249 | u8 didt; | |
250 | u8 bst; | |
251 | u8 brt; | |
252 | u8 to; | |
253 | u8 ppt; | |
254 | /* optional */ | |
255 | u8 gt[]; | |
256 | } __packed; | |
c46ee386 | 257 | |
ad3823ce SO |
258 | |
259 | /* PN533_TG_INIT_AS_TARGET */ | |
260 | #define PN533_INIT_TARGET_PASSIVE 0x1 | |
261 | #define PN533_INIT_TARGET_DEP 0x2 | |
262 | ||
fc40a8c1 SO |
263 | #define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3 |
264 | #define PN533_INIT_TARGET_RESP_ACTIVE 0x1 | |
265 | #define PN533_INIT_TARGET_RESP_DEP 0x4 | |
266 | ||
ad3823ce SO |
267 | struct pn533_cmd_init_target { |
268 | u8 mode; | |
269 | u8 mifare[6]; | |
270 | u8 felica[18]; | |
271 | u8 nfcid3[10]; | |
272 | u8 gb_len; | |
273 | u8 gb[]; | |
274 | } __packed; | |
275 | ||
276 | struct pn533_cmd_init_target_response { | |
277 | u8 mode; | |
278 | u8 cmd[]; | |
279 | } __packed; | |
280 | ||
c46ee386 AAJ |
281 | struct pn533 { |
282 | struct usb_device *udev; | |
283 | struct usb_interface *interface; | |
284 | struct nfc_dev *nfc_dev; | |
285 | ||
286 | struct urb *out_urb; | |
287 | int out_maxlen; | |
288 | struct pn533_frame *out_frame; | |
289 | ||
290 | struct urb *in_urb; | |
291 | int in_maxlen; | |
292 | struct pn533_frame *in_frame; | |
293 | ||
6ff73fd2 SO |
294 | struct sk_buff_head resp_q; |
295 | ||
4849f85e SO |
296 | struct workqueue_struct *wq; |
297 | struct work_struct cmd_work; | |
6ff73fd2 | 298 | struct work_struct mi_work; |
4849f85e SO |
299 | struct pn533_frame *wq_in_frame; |
300 | int wq_in_error; | |
c46ee386 AAJ |
301 | |
302 | pn533_cmd_complete_t cmd_complete; | |
303 | void *cmd_complete_arg; | |
304 | struct semaphore cmd_lock; | |
305 | u8 cmd; | |
306 | ||
307 | struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1]; | |
308 | u8 poll_mod_count; | |
309 | u8 poll_mod_curr; | |
310 | u32 poll_protocols; | |
311 | ||
312 | u8 tgt_available_prots; | |
313 | u8 tgt_active_prot; | |
314 | }; | |
315 | ||
316 | struct pn533_frame { | |
317 | u8 preamble; | |
318 | __be16 start_frame; | |
319 | u8 datalen; | |
320 | u8 datalen_checksum; | |
321 | u8 data[]; | |
322 | } __packed; | |
323 | ||
324 | /* The rule: value + checksum = 0 */ | |
325 | static inline u8 pn533_checksum(u8 value) | |
326 | { | |
327 | return ~value + 1; | |
328 | } | |
329 | ||
330 | /* The rule: sum(data elements) + checksum = 0 */ | |
331 | static u8 pn533_data_checksum(u8 *data, int datalen) | |
332 | { | |
333 | u8 sum = 0; | |
334 | int i; | |
335 | ||
336 | for (i = 0; i < datalen; i++) | |
337 | sum += data[i]; | |
338 | ||
339 | return pn533_checksum(sum); | |
340 | } | |
341 | ||
342 | /** | |
343 | * pn533_tx_frame_ack - create a ack frame | |
344 | * @frame: The frame to be set as ack | |
345 | * | |
346 | * Ack is different type of standard frame. As a standard frame, it has | |
347 | * preamble and start_frame. However the checksum of this frame must fail, | |
348 | * i.e. datalen + datalen_checksum must NOT be zero. When the checksum test | |
349 | * fails and datalen = 0 and datalen_checksum = 0xFF, the frame is a ack. | |
350 | * After datalen_checksum field, the postamble is placed. | |
351 | */ | |
352 | static void pn533_tx_frame_ack(struct pn533_frame *frame) | |
353 | { | |
354 | frame->preamble = 0; | |
355 | frame->start_frame = cpu_to_be16(PN533_SOF); | |
356 | frame->datalen = 0; | |
357 | frame->datalen_checksum = 0xFF; | |
358 | /* data[0] is used as postamble */ | |
359 | frame->data[0] = 0; | |
360 | } | |
361 | ||
362 | static void pn533_tx_frame_init(struct pn533_frame *frame, u8 cmd) | |
363 | { | |
364 | frame->preamble = 0; | |
365 | frame->start_frame = cpu_to_be16(PN533_SOF); | |
366 | PN533_FRAME_IDENTIFIER(frame) = PN533_DIR_OUT; | |
367 | PN533_FRAME_CMD(frame) = cmd; | |
368 | frame->datalen = 2; | |
369 | } | |
370 | ||
371 | static void pn533_tx_frame_finish(struct pn533_frame *frame) | |
372 | { | |
373 | frame->datalen_checksum = pn533_checksum(frame->datalen); | |
374 | ||
375 | PN533_FRAME_CHECKSUM(frame) = | |
376 | pn533_data_checksum(frame->data, frame->datalen); | |
377 | ||
378 | PN533_FRAME_POSTAMBLE(frame) = 0; | |
379 | } | |
380 | ||
381 | static bool pn533_rx_frame_is_valid(struct pn533_frame *frame) | |
382 | { | |
383 | u8 checksum; | |
384 | ||
385 | if (frame->start_frame != cpu_to_be16(PN533_SOF)) | |
386 | return false; | |
387 | ||
388 | checksum = pn533_checksum(frame->datalen); | |
389 | if (checksum != frame->datalen_checksum) | |
390 | return false; | |
391 | ||
392 | checksum = pn533_data_checksum(frame->data, frame->datalen); | |
393 | if (checksum != PN533_FRAME_CHECKSUM(frame)) | |
394 | return false; | |
395 | ||
396 | return true; | |
397 | } | |
398 | ||
399 | static bool pn533_rx_frame_is_ack(struct pn533_frame *frame) | |
400 | { | |
401 | if (frame->start_frame != cpu_to_be16(PN533_SOF)) | |
402 | return false; | |
403 | ||
404 | if (frame->datalen != 0 || frame->datalen_checksum != 0xFF) | |
405 | return false; | |
406 | ||
407 | return true; | |
408 | } | |
409 | ||
410 | static bool pn533_rx_frame_is_cmd_response(struct pn533_frame *frame, u8 cmd) | |
411 | { | |
412 | return (PN533_FRAME_CMD(frame) == PN533_CMD_RESPONSE(cmd)); | |
413 | } | |
414 | ||
4849f85e SO |
415 | |
416 | static void pn533_wq_cmd_complete(struct work_struct *work) | |
c46ee386 | 417 | { |
4849f85e SO |
418 | struct pn533 *dev = container_of(work, struct pn533, cmd_work); |
419 | struct pn533_frame *in_frame; | |
c46ee386 AAJ |
420 | int rc; |
421 | ||
4849f85e SO |
422 | in_frame = dev->wq_in_frame; |
423 | ||
424 | if (dev->wq_in_error) | |
c46ee386 | 425 | rc = dev->cmd_complete(dev, dev->cmd_complete_arg, NULL, |
4849f85e | 426 | dev->wq_in_error); |
c46ee386 AAJ |
427 | else |
428 | rc = dev->cmd_complete(dev, dev->cmd_complete_arg, | |
429 | PN533_FRAME_CMD_PARAMS_PTR(in_frame), | |
430 | PN533_FRAME_CMD_PARAMS_LEN(in_frame)); | |
431 | ||
432 | if (rc != -EINPROGRESS) | |
433 | up(&dev->cmd_lock); | |
434 | } | |
435 | ||
436 | static void pn533_recv_response(struct urb *urb) | |
437 | { | |
438 | struct pn533 *dev = urb->context; | |
439 | struct pn533_frame *in_frame; | |
440 | ||
4849f85e | 441 | dev->wq_in_frame = NULL; |
c46ee386 AAJ |
442 | |
443 | switch (urb->status) { | |
444 | case 0: | |
445 | /* success */ | |
446 | break; | |
447 | case -ECONNRESET: | |
448 | case -ENOENT: | |
449 | case -ESHUTDOWN: | |
450 | nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with" | |
451 | " status: %d", urb->status); | |
4849f85e SO |
452 | dev->wq_in_error = urb->status; |
453 | goto sched_wq; | |
c46ee386 AAJ |
454 | default: |
455 | nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:" | |
456 | " %d", urb->status); | |
4849f85e SO |
457 | dev->wq_in_error = urb->status; |
458 | goto sched_wq; | |
c46ee386 AAJ |
459 | } |
460 | ||
461 | in_frame = dev->in_urb->transfer_buffer; | |
462 | ||
463 | if (!pn533_rx_frame_is_valid(in_frame)) { | |
464 | nfc_dev_err(&dev->interface->dev, "Received an invalid frame"); | |
4849f85e SO |
465 | dev->wq_in_error = -EIO; |
466 | goto sched_wq; | |
c46ee386 AAJ |
467 | } |
468 | ||
469 | if (!pn533_rx_frame_is_cmd_response(in_frame, dev->cmd)) { | |
470 | nfc_dev_err(&dev->interface->dev, "The received frame is not " | |
471 | "response to the last command"); | |
4849f85e SO |
472 | dev->wq_in_error = -EIO; |
473 | goto sched_wq; | |
c46ee386 AAJ |
474 | } |
475 | ||
476 | nfc_dev_dbg(&dev->interface->dev, "Received a valid frame"); | |
4849f85e SO |
477 | dev->wq_in_error = 0; |
478 | dev->wq_in_frame = in_frame; | |
c46ee386 | 479 | |
4849f85e SO |
480 | sched_wq: |
481 | queue_work(dev->wq, &dev->cmd_work); | |
c46ee386 AAJ |
482 | } |
483 | ||
484 | static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags) | |
485 | { | |
486 | dev->in_urb->complete = pn533_recv_response; | |
487 | ||
488 | return usb_submit_urb(dev->in_urb, flags); | |
489 | } | |
490 | ||
491 | static void pn533_recv_ack(struct urb *urb) | |
492 | { | |
493 | struct pn533 *dev = urb->context; | |
494 | struct pn533_frame *in_frame; | |
495 | int rc; | |
496 | ||
497 | switch (urb->status) { | |
498 | case 0: | |
499 | /* success */ | |
500 | break; | |
501 | case -ECONNRESET: | |
502 | case -ENOENT: | |
503 | case -ESHUTDOWN: | |
504 | nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with" | |
505 | " status: %d", urb->status); | |
4849f85e SO |
506 | dev->wq_in_error = urb->status; |
507 | goto sched_wq; | |
c46ee386 AAJ |
508 | default: |
509 | nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:" | |
510 | " %d", urb->status); | |
4849f85e SO |
511 | dev->wq_in_error = urb->status; |
512 | goto sched_wq; | |
c46ee386 AAJ |
513 | } |
514 | ||
515 | in_frame = dev->in_urb->transfer_buffer; | |
516 | ||
517 | if (!pn533_rx_frame_is_ack(in_frame)) { | |
518 | nfc_dev_err(&dev->interface->dev, "Received an invalid ack"); | |
4849f85e SO |
519 | dev->wq_in_error = -EIO; |
520 | goto sched_wq; | |
c46ee386 AAJ |
521 | } |
522 | ||
523 | nfc_dev_dbg(&dev->interface->dev, "Received a valid ack"); | |
524 | ||
525 | rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC); | |
526 | if (rc) { | |
527 | nfc_dev_err(&dev->interface->dev, "usb_submit_urb failed with" | |
528 | " result %d", rc); | |
4849f85e SO |
529 | dev->wq_in_error = rc; |
530 | goto sched_wq; | |
c46ee386 AAJ |
531 | } |
532 | ||
533 | return; | |
534 | ||
4849f85e SO |
535 | sched_wq: |
536 | dev->wq_in_frame = NULL; | |
537 | queue_work(dev->wq, &dev->cmd_work); | |
c46ee386 AAJ |
538 | } |
539 | ||
540 | static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags) | |
541 | { | |
542 | dev->in_urb->complete = pn533_recv_ack; | |
543 | ||
544 | return usb_submit_urb(dev->in_urb, flags); | |
545 | } | |
546 | ||
547 | static int pn533_send_ack(struct pn533 *dev, gfp_t flags) | |
548 | { | |
549 | int rc; | |
550 | ||
551 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
552 | ||
553 | pn533_tx_frame_ack(dev->out_frame); | |
554 | ||
555 | dev->out_urb->transfer_buffer = dev->out_frame; | |
556 | dev->out_urb->transfer_buffer_length = PN533_FRAME_ACK_SIZE; | |
557 | rc = usb_submit_urb(dev->out_urb, flags); | |
558 | ||
559 | return rc; | |
560 | } | |
561 | ||
562 | static int __pn533_send_cmd_frame_async(struct pn533 *dev, | |
563 | struct pn533_frame *out_frame, | |
564 | struct pn533_frame *in_frame, | |
565 | int in_frame_len, | |
566 | pn533_cmd_complete_t cmd_complete, | |
567 | void *arg, gfp_t flags) | |
568 | { | |
569 | int rc; | |
570 | ||
571 | nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x", | |
572 | PN533_FRAME_CMD(out_frame)); | |
573 | ||
574 | dev->cmd = PN533_FRAME_CMD(out_frame); | |
575 | dev->cmd_complete = cmd_complete; | |
576 | dev->cmd_complete_arg = arg; | |
577 | ||
578 | dev->out_urb->transfer_buffer = out_frame; | |
579 | dev->out_urb->transfer_buffer_length = | |
580 | PN533_FRAME_SIZE(out_frame); | |
581 | ||
582 | dev->in_urb->transfer_buffer = in_frame; | |
583 | dev->in_urb->transfer_buffer_length = in_frame_len; | |
584 | ||
585 | rc = usb_submit_urb(dev->out_urb, flags); | |
586 | if (rc) | |
587 | return rc; | |
588 | ||
589 | rc = pn533_submit_urb_for_ack(dev, flags); | |
590 | if (rc) | |
591 | goto error; | |
592 | ||
593 | return 0; | |
594 | ||
595 | error: | |
596 | usb_unlink_urb(dev->out_urb); | |
597 | return rc; | |
598 | } | |
599 | ||
600 | static int pn533_send_cmd_frame_async(struct pn533 *dev, | |
601 | struct pn533_frame *out_frame, | |
602 | struct pn533_frame *in_frame, | |
603 | int in_frame_len, | |
604 | pn533_cmd_complete_t cmd_complete, | |
605 | void *arg, gfp_t flags) | |
606 | { | |
607 | int rc; | |
608 | ||
609 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
610 | ||
611 | if (down_trylock(&dev->cmd_lock)) | |
612 | return -EBUSY; | |
613 | ||
614 | rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame, | |
615 | in_frame_len, cmd_complete, arg, flags); | |
616 | if (rc) | |
617 | goto error; | |
618 | ||
619 | return 0; | |
620 | error: | |
621 | up(&dev->cmd_lock); | |
622 | return rc; | |
623 | } | |
624 | ||
625 | struct pn533_sync_cmd_response { | |
626 | int rc; | |
627 | struct completion done; | |
628 | }; | |
629 | ||
630 | static int pn533_sync_cmd_complete(struct pn533 *dev, void *_arg, | |
631 | u8 *params, int params_len) | |
632 | { | |
633 | struct pn533_sync_cmd_response *arg = _arg; | |
634 | ||
635 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
636 | ||
637 | arg->rc = 0; | |
638 | ||
639 | if (params_len < 0) /* error */ | |
640 | arg->rc = params_len; | |
641 | ||
642 | complete(&arg->done); | |
643 | ||
644 | return 0; | |
645 | } | |
646 | ||
647 | static int pn533_send_cmd_frame_sync(struct pn533 *dev, | |
648 | struct pn533_frame *out_frame, | |
649 | struct pn533_frame *in_frame, | |
650 | int in_frame_len) | |
651 | { | |
652 | int rc; | |
653 | struct pn533_sync_cmd_response arg; | |
654 | ||
655 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
656 | ||
657 | init_completion(&arg.done); | |
658 | ||
659 | rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, in_frame_len, | |
660 | pn533_sync_cmd_complete, &arg, GFP_KERNEL); | |
661 | if (rc) | |
662 | return rc; | |
663 | ||
664 | wait_for_completion(&arg.done); | |
665 | ||
666 | return arg.rc; | |
667 | } | |
668 | ||
669 | static void pn533_send_complete(struct urb *urb) | |
670 | { | |
671 | struct pn533 *dev = urb->context; | |
672 | ||
673 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
674 | ||
675 | switch (urb->status) { | |
676 | case 0: | |
677 | /* success */ | |
678 | break; | |
679 | case -ECONNRESET: | |
680 | case -ENOENT: | |
681 | case -ESHUTDOWN: | |
682 | nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with" | |
683 | " status: %d", urb->status); | |
684 | break; | |
685 | default: | |
686 | nfc_dev_dbg(&dev->interface->dev, "Nonzero urb status received:" | |
687 | " %d", urb->status); | |
688 | } | |
689 | } | |
690 | ||
691 | struct pn533_target_type_a { | |
692 | __be16 sens_res; | |
693 | u8 sel_res; | |
694 | u8 nfcid_len; | |
695 | u8 nfcid_data[]; | |
696 | } __packed; | |
697 | ||
698 | ||
699 | #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6)) | |
700 | #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0)) | |
701 | #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8)) | |
702 | ||
703 | #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00 | |
704 | #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C | |
705 | ||
706 | #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5) | |
707 | #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2) | |
708 | ||
709 | #define PN533_TYPE_A_SEL_PROT_MIFARE 0 | |
710 | #define PN533_TYPE_A_SEL_PROT_ISO14443 1 | |
711 | #define PN533_TYPE_A_SEL_PROT_DEP 2 | |
712 | #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3 | |
713 | ||
714 | static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a, | |
715 | int target_data_len) | |
716 | { | |
717 | u8 ssd; | |
718 | u8 platconf; | |
719 | ||
720 | if (target_data_len < sizeof(struct pn533_target_type_a)) | |
721 | return false; | |
722 | ||
723 | /* The lenght check of nfcid[] and ats[] are not being performed because | |
724 | the values are not being used */ | |
725 | ||
726 | /* Requirement 4.6.3.3 from NFC Forum Digital Spec */ | |
727 | ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res); | |
728 | platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res); | |
729 | ||
730 | if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL && | |
731 | platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) || | |
732 | (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL && | |
733 | platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL)) | |
734 | return false; | |
735 | ||
736 | /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */ | |
737 | if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0) | |
738 | return false; | |
739 | ||
740 | return true; | |
741 | } | |
742 | ||
743 | static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data, | |
744 | int tgt_data_len) | |
745 | { | |
746 | struct pn533_target_type_a *tgt_type_a; | |
747 | ||
748 | tgt_type_a = (struct pn533_target_type_a *) tgt_data; | |
749 | ||
750 | if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len)) | |
751 | return -EPROTO; | |
752 | ||
753 | switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) { | |
754 | case PN533_TYPE_A_SEL_PROT_MIFARE: | |
755 | nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK; | |
756 | break; | |
757 | case PN533_TYPE_A_SEL_PROT_ISO14443: | |
758 | nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK; | |
759 | break; | |
760 | case PN533_TYPE_A_SEL_PROT_DEP: | |
761 | nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK; | |
762 | break; | |
763 | case PN533_TYPE_A_SEL_PROT_ISO14443_DEP: | |
764 | nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK | | |
765 | NFC_PROTO_NFC_DEP_MASK; | |
766 | break; | |
767 | } | |
768 | ||
769 | nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res); | |
770 | nfc_tgt->sel_res = tgt_type_a->sel_res; | |
c3b1e1e8 SO |
771 | nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len; |
772 | memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len); | |
c46ee386 AAJ |
773 | |
774 | return 0; | |
775 | } | |
776 | ||
777 | struct pn533_target_felica { | |
778 | u8 pol_res; | |
779 | u8 opcode; | |
780 | u8 nfcid2[8]; | |
781 | u8 pad[8]; | |
782 | /* optional */ | |
783 | u8 syst_code[]; | |
784 | } __packed; | |
785 | ||
786 | #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01 | |
787 | #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE | |
788 | ||
789 | static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica, | |
790 | int target_data_len) | |
791 | { | |
792 | if (target_data_len < sizeof(struct pn533_target_felica)) | |
793 | return false; | |
794 | ||
795 | if (felica->opcode != PN533_FELICA_OPC_SENSF_RES) | |
796 | return false; | |
797 | ||
798 | return true; | |
799 | } | |
800 | ||
801 | static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data, | |
802 | int tgt_data_len) | |
803 | { | |
804 | struct pn533_target_felica *tgt_felica; | |
805 | ||
806 | tgt_felica = (struct pn533_target_felica *) tgt_data; | |
807 | ||
808 | if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len)) | |
809 | return -EPROTO; | |
810 | ||
811 | if (tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1 && | |
812 | tgt_felica->nfcid2[1] == | |
813 | PN533_FELICA_SENSF_NFCID2_DEP_B2) | |
814 | nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK; | |
815 | else | |
816 | nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK; | |
817 | ||
7975754f SO |
818 | memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9); |
819 | nfc_tgt->sensf_res_len = 9; | |
820 | ||
c46ee386 AAJ |
821 | return 0; |
822 | } | |
823 | ||
824 | struct pn533_target_jewel { | |
825 | __be16 sens_res; | |
826 | u8 jewelid[4]; | |
827 | } __packed; | |
828 | ||
829 | static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel, | |
830 | int target_data_len) | |
831 | { | |
832 | u8 ssd; | |
833 | u8 platconf; | |
834 | ||
835 | if (target_data_len < sizeof(struct pn533_target_jewel)) | |
836 | return false; | |
837 | ||
838 | /* Requirement 4.6.3.3 from NFC Forum Digital Spec */ | |
839 | ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res); | |
840 | platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res); | |
841 | ||
842 | if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL && | |
843 | platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) || | |
844 | (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL && | |
845 | platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL)) | |
846 | return false; | |
847 | ||
848 | return true; | |
849 | } | |
850 | ||
851 | static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data, | |
852 | int tgt_data_len) | |
853 | { | |
854 | struct pn533_target_jewel *tgt_jewel; | |
855 | ||
856 | tgt_jewel = (struct pn533_target_jewel *) tgt_data; | |
857 | ||
858 | if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len)) | |
859 | return -EPROTO; | |
860 | ||
861 | nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK; | |
862 | nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res); | |
d8dc1072 SO |
863 | nfc_tgt->nfcid1_len = 4; |
864 | memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len); | |
c46ee386 AAJ |
865 | |
866 | return 0; | |
867 | } | |
868 | ||
869 | struct pn533_type_b_prot_info { | |
870 | u8 bitrate; | |
871 | u8 fsci_type; | |
872 | u8 fwi_adc_fo; | |
873 | } __packed; | |
874 | ||
875 | #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4) | |
876 | #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0) | |
877 | #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8 | |
878 | ||
879 | struct pn533_type_b_sens_res { | |
880 | u8 opcode; | |
881 | u8 nfcid[4]; | |
882 | u8 appdata[4]; | |
883 | struct pn533_type_b_prot_info prot_info; | |
884 | } __packed; | |
885 | ||
886 | #define PN533_TYPE_B_OPC_SENSB_RES 0x50 | |
887 | ||
888 | struct pn533_target_type_b { | |
889 | struct pn533_type_b_sens_res sensb_res; | |
890 | u8 attrib_res_len; | |
891 | u8 attrib_res[]; | |
892 | } __packed; | |
893 | ||
894 | static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b, | |
895 | int target_data_len) | |
896 | { | |
897 | if (target_data_len < sizeof(struct pn533_target_type_b)) | |
898 | return false; | |
899 | ||
900 | if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES) | |
901 | return false; | |
902 | ||
903 | if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) & | |
904 | PN533_TYPE_B_PROT_TYPE_RFU_MASK) | |
905 | return false; | |
906 | ||
907 | return true; | |
908 | } | |
909 | ||
910 | static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data, | |
911 | int tgt_data_len) | |
912 | { | |
913 | struct pn533_target_type_b *tgt_type_b; | |
914 | ||
915 | tgt_type_b = (struct pn533_target_type_b *) tgt_data; | |
916 | ||
917 | if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len)) | |
918 | return -EPROTO; | |
919 | ||
920 | nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK; | |
921 | ||
922 | return 0; | |
923 | } | |
924 | ||
925 | struct pn533_poll_response { | |
926 | u8 nbtg; | |
927 | u8 tg; | |
928 | u8 target_data[]; | |
929 | } __packed; | |
930 | ||
931 | static int pn533_target_found(struct pn533 *dev, | |
932 | struct pn533_poll_response *resp, int resp_len) | |
933 | { | |
934 | int target_data_len; | |
935 | struct nfc_target nfc_tgt; | |
936 | int rc; | |
937 | ||
938 | nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__, | |
939 | dev->poll_mod_curr); | |
940 | ||
941 | if (resp->tg != 1) | |
942 | return -EPROTO; | |
943 | ||
98b3ac1b SO |
944 | memset(&nfc_tgt, 0, sizeof(struct nfc_target)); |
945 | ||
c46ee386 AAJ |
946 | target_data_len = resp_len - sizeof(struct pn533_poll_response); |
947 | ||
948 | switch (dev->poll_mod_curr) { | |
949 | case PN533_POLL_MOD_106KBPS_A: | |
950 | rc = pn533_target_found_type_a(&nfc_tgt, resp->target_data, | |
951 | target_data_len); | |
952 | break; | |
953 | case PN533_POLL_MOD_212KBPS_FELICA: | |
954 | case PN533_POLL_MOD_424KBPS_FELICA: | |
955 | rc = pn533_target_found_felica(&nfc_tgt, resp->target_data, | |
956 | target_data_len); | |
957 | break; | |
958 | case PN533_POLL_MOD_106KBPS_JEWEL: | |
959 | rc = pn533_target_found_jewel(&nfc_tgt, resp->target_data, | |
960 | target_data_len); | |
961 | break; | |
962 | case PN533_POLL_MOD_847KBPS_B: | |
963 | rc = pn533_target_found_type_b(&nfc_tgt, resp->target_data, | |
964 | target_data_len); | |
965 | break; | |
966 | default: | |
967 | nfc_dev_err(&dev->interface->dev, "Unknown current poll" | |
968 | " modulation"); | |
969 | return -EPROTO; | |
970 | } | |
971 | ||
972 | if (rc) | |
973 | return rc; | |
974 | ||
975 | if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) { | |
976 | nfc_dev_dbg(&dev->interface->dev, "The target found does not" | |
977 | " have the desired protocol"); | |
978 | return -EAGAIN; | |
979 | } | |
980 | ||
981 | nfc_dev_dbg(&dev->interface->dev, "Target found - supported protocols: " | |
982 | "0x%x", nfc_tgt.supported_protocols); | |
983 | ||
984 | dev->tgt_available_prots = nfc_tgt.supported_protocols; | |
985 | ||
986 | nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1); | |
987 | ||
988 | return 0; | |
989 | } | |
990 | ||
991 | static void pn533_poll_reset_mod_list(struct pn533 *dev) | |
992 | { | |
993 | dev->poll_mod_count = 0; | |
994 | } | |
995 | ||
996 | static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index) | |
997 | { | |
998 | dev->poll_mod_active[dev->poll_mod_count] = | |
999 | (struct pn533_poll_modulations *) &poll_mod[mod_index]; | |
1000 | dev->poll_mod_count++; | |
1001 | } | |
1002 | ||
1003 | static void pn533_poll_create_mod_list(struct pn533 *dev, u32 protocols) | |
1004 | { | |
1005 | pn533_poll_reset_mod_list(dev); | |
1006 | ||
1007 | if (protocols & NFC_PROTO_MIFARE_MASK | |
1008 | || protocols & NFC_PROTO_ISO14443_MASK | |
1009 | || protocols & NFC_PROTO_NFC_DEP_MASK) | |
1010 | pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A); | |
1011 | ||
1012 | if (protocols & NFC_PROTO_FELICA_MASK | |
1013 | || protocols & NFC_PROTO_NFC_DEP_MASK) { | |
1014 | pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA); | |
1015 | pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA); | |
1016 | } | |
1017 | ||
1018 | if (protocols & NFC_PROTO_JEWEL_MASK) | |
1019 | pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL); | |
1020 | ||
1021 | if (protocols & NFC_PROTO_ISO14443_MASK) | |
1022 | pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B); | |
1023 | } | |
1024 | ||
1025 | static void pn533_start_poll_frame(struct pn533_frame *frame, | |
1026 | struct pn533_poll_modulations *mod) | |
1027 | { | |
1028 | ||
1029 | pn533_tx_frame_init(frame, PN533_CMD_IN_LIST_PASSIVE_TARGET); | |
1030 | ||
1031 | memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), &mod->data, mod->len); | |
1032 | frame->datalen += mod->len; | |
1033 | ||
1034 | pn533_tx_frame_finish(frame); | |
1035 | } | |
1036 | ||
1037 | static int pn533_start_poll_complete(struct pn533 *dev, void *arg, | |
1038 | u8 *params, int params_len) | |
1039 | { | |
1040 | struct pn533_poll_response *resp; | |
1041 | struct pn533_poll_modulations *next_mod; | |
1042 | int rc; | |
1043 | ||
1044 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
1045 | ||
1046 | if (params_len == -ENOENT) { | |
1047 | nfc_dev_dbg(&dev->interface->dev, "Polling operation has been" | |
1048 | " stopped"); | |
1049 | goto stop_poll; | |
1050 | } | |
1051 | ||
1052 | if (params_len < 0) { | |
1053 | nfc_dev_err(&dev->interface->dev, "Error %d when running poll", | |
1054 | params_len); | |
1055 | goto stop_poll; | |
1056 | } | |
1057 | ||
1058 | resp = (struct pn533_poll_response *) params; | |
1059 | if (resp->nbtg) { | |
1060 | rc = pn533_target_found(dev, resp, params_len); | |
1061 | ||
1062 | /* We must stop the poll after a valid target found */ | |
1063 | if (rc == 0) | |
1064 | goto stop_poll; | |
1065 | ||
1066 | if (rc != -EAGAIN) | |
1067 | nfc_dev_err(&dev->interface->dev, "The target found is" | |
1068 | " not valid - continuing to poll"); | |
1069 | } | |
1070 | ||
1071 | dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count; | |
1072 | ||
1073 | next_mod = dev->poll_mod_active[dev->poll_mod_curr]; | |
1074 | ||
1075 | nfc_dev_dbg(&dev->interface->dev, "Polling next modulation (0x%x)", | |
1076 | dev->poll_mod_curr); | |
1077 | ||
1078 | pn533_start_poll_frame(dev->out_frame, next_mod); | |
1079 | ||
1080 | /* Don't need to down the semaphore again */ | |
1081 | rc = __pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame, | |
1082 | dev->in_maxlen, pn533_start_poll_complete, | |
1083 | NULL, GFP_ATOMIC); | |
1084 | ||
1085 | if (rc == -EPERM) { | |
1086 | nfc_dev_dbg(&dev->interface->dev, "Cannot poll next modulation" | |
1087 | " because poll has been stopped"); | |
1088 | goto stop_poll; | |
1089 | } | |
1090 | ||
1091 | if (rc) { | |
1092 | nfc_dev_err(&dev->interface->dev, "Error %d when trying to poll" | |
1093 | " next modulation", rc); | |
1094 | goto stop_poll; | |
1095 | } | |
1096 | ||
1097 | /* Inform caller function to do not up the semaphore */ | |
1098 | return -EINPROGRESS; | |
1099 | ||
1100 | stop_poll: | |
1101 | pn533_poll_reset_mod_list(dev); | |
1102 | dev->poll_protocols = 0; | |
1103 | return 0; | |
1104 | } | |
1105 | ||
ad3823ce SO |
1106 | static int pn533_init_target_frame(struct pn533_frame *frame, |
1107 | u8 *gb, size_t gb_len) | |
1108 | { | |
1109 | struct pn533_cmd_init_target *cmd; | |
1110 | size_t cmd_len; | |
1111 | ||
1112 | cmd_len = sizeof(struct pn533_cmd_init_target) + gb_len + 1; | |
1113 | cmd = kzalloc(cmd_len, GFP_KERNEL); | |
1114 | if (cmd == NULL) | |
1115 | return -ENOMEM; | |
1116 | ||
1117 | pn533_tx_frame_init(frame, PN533_CMD_TG_INIT_AS_TARGET); | |
1118 | ||
1119 | /* DEP support only */ | |
1120 | cmd->mode |= PN533_INIT_TARGET_DEP; | |
1121 | get_random_bytes(cmd->nfcid3, 10); | |
1122 | cmd->gb_len = gb_len; | |
1123 | memcpy(cmd->gb, gb, gb_len); | |
1124 | /* Len Tk */ | |
1125 | cmd->gb[gb_len] = 0; | |
1126 | ||
1127 | memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), cmd, cmd_len); | |
1128 | frame->datalen += cmd_len; | |
1129 | ||
1130 | pn533_tx_frame_finish(frame); | |
1131 | ||
1132 | return 0; | |
1133 | } | |
1134 | ||
fc40a8c1 | 1135 | #define ATR_REQ_GB_OFFSET 17 |
ad3823ce SO |
1136 | static int pn533_init_target_complete(struct pn533 *dev, void *arg, |
1137 | u8 *params, int params_len) | |
fe7c5800 | 1138 | { |
ad3823ce | 1139 | struct pn533_cmd_init_target_response *resp; |
fc40a8c1 SO |
1140 | u8 frame, comm_mode = NFC_COMM_PASSIVE, *gb; |
1141 | size_t gb_len; | |
ad3823ce SO |
1142 | |
1143 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
1144 | ||
1145 | if (params_len < 0) { | |
1146 | nfc_dev_err(&dev->interface->dev, | |
1147 | "Error %d when starting as a target", | |
1148 | params_len); | |
1149 | ||
1150 | return params_len; | |
1151 | } | |
1152 | ||
fc40a8c1 SO |
1153 | if (params_len < ATR_REQ_GB_OFFSET + 1) |
1154 | return -EINVAL; | |
1155 | ||
ad3823ce SO |
1156 | resp = (struct pn533_cmd_init_target_response *) params; |
1157 | ||
fc40a8c1 SO |
1158 | nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x param len %d\n", |
1159 | resp->mode, params_len); | |
ad3823ce | 1160 | |
fc40a8c1 SO |
1161 | frame = resp->mode & PN533_INIT_TARGET_RESP_FRAME_MASK; |
1162 | if (frame == PN533_INIT_TARGET_RESP_ACTIVE) | |
1163 | comm_mode = NFC_COMM_ACTIVE; | |
1164 | ||
1165 | /* Again, only DEP */ | |
1166 | if ((resp->mode & PN533_INIT_TARGET_RESP_DEP) == 0) | |
1167 | return -EOPNOTSUPP; | |
1168 | ||
1169 | gb = resp->cmd + ATR_REQ_GB_OFFSET; | |
1170 | gb_len = params_len - (ATR_REQ_GB_OFFSET + 1); | |
1171 | ||
1172 | return nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK, | |
1173 | comm_mode, gb, gb_len); | |
fe7c5800 SO |
1174 | } |
1175 | ||
ad3823ce SO |
1176 | static int pn533_init_target(struct nfc_dev *nfc_dev, u32 protocols) |
1177 | { | |
1178 | struct pn533 *dev = nfc_get_drvdata(nfc_dev); | |
1179 | u8 *gb; | |
1180 | size_t gb_len; | |
1181 | int rc; | |
1182 | ||
1183 | pn533_poll_reset_mod_list(dev); | |
1184 | ||
1185 | gb = nfc_get_local_general_bytes(nfc_dev, &gb_len); | |
1186 | if (gb == NULL) | |
1187 | return -ENOMEM; | |
1188 | ||
1189 | rc = pn533_init_target_frame(dev->out_frame, gb, gb_len); | |
1190 | if (rc < 0) | |
1191 | return rc; | |
1192 | ||
1193 | rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame, | |
1194 | dev->in_maxlen, | |
1195 | pn533_init_target_complete, | |
1196 | NULL, GFP_KERNEL); | |
1197 | ||
1198 | if (rc) | |
1199 | nfc_dev_err(&dev->interface->dev, | |
1200 | "Error %d when trying to initiate as a target", rc); | |
1201 | ||
1202 | dev->poll_mod_count++; | |
1203 | ||
1204 | return rc; | |
1205 | } | |
1206 | ||
fe7c5800 | 1207 | static int pn533_start_im_poll(struct nfc_dev *nfc_dev, u32 protocols) |
c46ee386 AAJ |
1208 | { |
1209 | struct pn533 *dev = nfc_get_drvdata(nfc_dev); | |
1210 | struct pn533_poll_modulations *start_mod; | |
1211 | int rc; | |
1212 | ||
c46ee386 AAJ |
1213 | if (dev->poll_mod_count) { |
1214 | nfc_dev_err(&dev->interface->dev, "Polling operation already" | |
1215 | " active"); | |
1216 | return -EBUSY; | |
1217 | } | |
1218 | ||
c46ee386 AAJ |
1219 | pn533_poll_create_mod_list(dev, protocols); |
1220 | ||
1221 | if (!dev->poll_mod_count) { | |
1222 | nfc_dev_err(&dev->interface->dev, "No valid protocols" | |
1223 | " specified"); | |
1224 | rc = -EINVAL; | |
1225 | goto error; | |
1226 | } | |
1227 | ||
1228 | nfc_dev_dbg(&dev->interface->dev, "It will poll %d modulations types", | |
1229 | dev->poll_mod_count); | |
1230 | ||
1231 | dev->poll_mod_curr = 0; | |
1232 | start_mod = dev->poll_mod_active[dev->poll_mod_curr]; | |
1233 | ||
1234 | pn533_start_poll_frame(dev->out_frame, start_mod); | |
1235 | ||
1236 | rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame, | |
1237 | dev->in_maxlen, pn533_start_poll_complete, | |
1238 | NULL, GFP_KERNEL); | |
1239 | ||
1240 | if (rc) { | |
1241 | nfc_dev_err(&dev->interface->dev, "Error %d when trying to" | |
1242 | " start poll", rc); | |
1243 | goto error; | |
1244 | } | |
1245 | ||
1246 | dev->poll_protocols = protocols; | |
1247 | ||
1248 | return 0; | |
1249 | ||
1250 | error: | |
1251 | pn533_poll_reset_mod_list(dev); | |
1252 | return rc; | |
1253 | } | |
1254 | ||
fe7c5800 SO |
1255 | static int pn533_start_poll(struct nfc_dev *nfc_dev, |
1256 | u32 im_protocols, u32 tm_protocols) | |
1257 | { | |
1258 | struct pn533 *dev = nfc_get_drvdata(nfc_dev); | |
1259 | ||
1260 | nfc_dev_dbg(&dev->interface->dev, | |
1261 | "%s: im protocols 0x%x tm protocols 0x%x", | |
1262 | __func__, im_protocols, tm_protocols); | |
1263 | ||
1264 | if (dev->tgt_active_prot) { | |
1265 | nfc_dev_err(&dev->interface->dev, | |
1266 | "Cannot poll with a target already activated"); | |
1267 | return -EBUSY; | |
1268 | } | |
1269 | ||
ad3823ce | 1270 | if (im_protocols) |
fe7c5800 | 1271 | return pn533_start_im_poll(nfc_dev, im_protocols); |
ad3823ce SO |
1272 | |
1273 | if (tm_protocols) | |
fe7c5800 | 1274 | return pn533_init_target(nfc_dev, tm_protocols); |
ad3823ce SO |
1275 | |
1276 | return -EINVAL; | |
fe7c5800 SO |
1277 | } |
1278 | ||
c46ee386 AAJ |
1279 | static void pn533_stop_poll(struct nfc_dev *nfc_dev) |
1280 | { | |
1281 | struct pn533 *dev = nfc_get_drvdata(nfc_dev); | |
1282 | ||
1283 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
1284 | ||
1285 | if (!dev->poll_mod_count) { | |
1286 | nfc_dev_dbg(&dev->interface->dev, "Polling operation was not" | |
1287 | " running"); | |
1288 | return; | |
1289 | } | |
1290 | ||
1291 | /* An ack will cancel the last issued command (poll) */ | |
1292 | pn533_send_ack(dev, GFP_KERNEL); | |
1293 | ||
1294 | /* prevent pn533_start_poll_complete to issue a new poll meanwhile */ | |
1295 | usb_kill_urb(dev->in_urb); | |
1296 | } | |
1297 | ||
1298 | static int pn533_activate_target_nfcdep(struct pn533 *dev) | |
1299 | { | |
1300 | struct pn533_cmd_activate_param param; | |
1301 | struct pn533_cmd_activate_response *resp; | |
541d920b | 1302 | u16 gt_len; |
c46ee386 AAJ |
1303 | int rc; |
1304 | ||
1305 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
1306 | ||
1307 | pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_ATR); | |
1308 | ||
1309 | param.tg = 1; | |
1310 | param.next = 0; | |
1311 | memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), ¶m, | |
1312 | sizeof(struct pn533_cmd_activate_param)); | |
1313 | dev->out_frame->datalen += sizeof(struct pn533_cmd_activate_param); | |
1314 | ||
1315 | pn533_tx_frame_finish(dev->out_frame); | |
1316 | ||
1317 | rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame, | |
1318 | dev->in_maxlen); | |
1319 | if (rc) | |
1320 | return rc; | |
1321 | ||
1322 | resp = (struct pn533_cmd_activate_response *) | |
1323 | PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame); | |
1324 | rc = resp->status & PN533_CMD_RET_MASK; | |
1325 | if (rc != PN533_CMD_RET_SUCCESS) | |
1326 | return -EIO; | |
1327 | ||
541d920b SO |
1328 | /* ATR_RES general bytes are located at offset 16 */ |
1329 | gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 16; | |
1330 | rc = nfc_set_remote_general_bytes(dev->nfc_dev, resp->gt, gt_len); | |
1331 | ||
1332 | return rc; | |
c46ee386 AAJ |
1333 | } |
1334 | ||
90099433 EL |
1335 | static int pn533_activate_target(struct nfc_dev *nfc_dev, |
1336 | struct nfc_target *target, u32 protocol) | |
c46ee386 AAJ |
1337 | { |
1338 | struct pn533 *dev = nfc_get_drvdata(nfc_dev); | |
1339 | int rc; | |
1340 | ||
1341 | nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__, | |
1342 | protocol); | |
1343 | ||
1344 | if (dev->poll_mod_count) { | |
1345 | nfc_dev_err(&dev->interface->dev, "Cannot activate while" | |
1346 | " polling"); | |
1347 | return -EBUSY; | |
1348 | } | |
1349 | ||
1350 | if (dev->tgt_active_prot) { | |
1351 | nfc_dev_err(&dev->interface->dev, "There is already an active" | |
1352 | " target"); | |
1353 | return -EBUSY; | |
1354 | } | |
1355 | ||
1356 | if (!dev->tgt_available_prots) { | |
1357 | nfc_dev_err(&dev->interface->dev, "There is no available target" | |
1358 | " to activate"); | |
1359 | return -EINVAL; | |
1360 | } | |
1361 | ||
1362 | if (!(dev->tgt_available_prots & (1 << protocol))) { | |
1363 | nfc_dev_err(&dev->interface->dev, "The target does not support" | |
1364 | " the requested protocol %u", protocol); | |
1365 | return -EINVAL; | |
1366 | } | |
1367 | ||
1368 | if (protocol == NFC_PROTO_NFC_DEP) { | |
1369 | rc = pn533_activate_target_nfcdep(dev); | |
1370 | if (rc) { | |
1371 | nfc_dev_err(&dev->interface->dev, "Error %d when" | |
1372 | " activating target with" | |
1373 | " NFC_DEP protocol", rc); | |
1374 | return rc; | |
1375 | } | |
1376 | } | |
1377 | ||
1378 | dev->tgt_active_prot = protocol; | |
1379 | dev->tgt_available_prots = 0; | |
1380 | ||
1381 | return 0; | |
1382 | } | |
1383 | ||
90099433 EL |
1384 | static void pn533_deactivate_target(struct nfc_dev *nfc_dev, |
1385 | struct nfc_target *target) | |
c46ee386 AAJ |
1386 | { |
1387 | struct pn533 *dev = nfc_get_drvdata(nfc_dev); | |
1388 | u8 tg; | |
1389 | u8 status; | |
1390 | int rc; | |
1391 | ||
1392 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
1393 | ||
1394 | if (!dev->tgt_active_prot) { | |
1395 | nfc_dev_err(&dev->interface->dev, "There is no active target"); | |
1396 | return; | |
1397 | } | |
1398 | ||
1399 | dev->tgt_active_prot = 0; | |
1400 | ||
6ff73fd2 SO |
1401 | skb_queue_purge(&dev->resp_q); |
1402 | ||
c46ee386 AAJ |
1403 | pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_RELEASE); |
1404 | ||
1405 | tg = 1; | |
1406 | memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &tg, sizeof(u8)); | |
1407 | dev->out_frame->datalen += sizeof(u8); | |
1408 | ||
1409 | pn533_tx_frame_finish(dev->out_frame); | |
1410 | ||
1411 | rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame, | |
1412 | dev->in_maxlen); | |
1413 | if (rc) { | |
1414 | nfc_dev_err(&dev->interface->dev, "Error when sending release" | |
1415 | " command to the controller"); | |
1416 | return; | |
1417 | } | |
1418 | ||
1419 | status = PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame)[0]; | |
1420 | rc = status & PN533_CMD_RET_MASK; | |
1421 | if (rc != PN533_CMD_RET_SUCCESS) | |
1422 | nfc_dev_err(&dev->interface->dev, "Error 0x%x when releasing" | |
1423 | " the target", rc); | |
1424 | ||
1425 | return; | |
1426 | } | |
1427 | ||
361f3cb7 SO |
1428 | |
1429 | static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg, | |
1430 | u8 *params, int params_len) | |
1431 | { | |
1432 | struct pn533_cmd_jump_dep *cmd; | |
1433 | struct pn533_cmd_jump_dep_response *resp; | |
1434 | struct nfc_target nfc_target; | |
1435 | u8 target_gt_len; | |
1436 | int rc; | |
1437 | ||
1438 | if (params_len == -ENOENT) { | |
1439 | nfc_dev_dbg(&dev->interface->dev, ""); | |
1440 | return 0; | |
1441 | } | |
1442 | ||
1443 | if (params_len < 0) { | |
1444 | nfc_dev_err(&dev->interface->dev, | |
1445 | "Error %d when bringing DEP link up", | |
1446 | params_len); | |
1447 | return 0; | |
1448 | } | |
1449 | ||
1450 | if (dev->tgt_available_prots && | |
1451 | !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) { | |
1452 | nfc_dev_err(&dev->interface->dev, | |
1453 | "The target does not support DEP"); | |
1454 | return -EINVAL; | |
1455 | } | |
1456 | ||
1457 | resp = (struct pn533_cmd_jump_dep_response *) params; | |
1458 | cmd = (struct pn533_cmd_jump_dep *) arg; | |
1459 | rc = resp->status & PN533_CMD_RET_MASK; | |
1460 | if (rc != PN533_CMD_RET_SUCCESS) { | |
1461 | nfc_dev_err(&dev->interface->dev, | |
1462 | "Bringing DEP link up failed %d", rc); | |
1463 | return 0; | |
1464 | } | |
1465 | ||
1466 | if (!dev->tgt_available_prots) { | |
1467 | nfc_dev_dbg(&dev->interface->dev, "Creating new target"); | |
1468 | ||
1469 | nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK; | |
2fbabfa4 SO |
1470 | nfc_target.nfcid1_len = 10; |
1471 | memcpy(nfc_target.nfcid1, resp->nfcid3t, nfc_target.nfcid1_len); | |
361f3cb7 SO |
1472 | rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1); |
1473 | if (rc) | |
1474 | return 0; | |
1475 | ||
1476 | dev->tgt_available_prots = 0; | |
1477 | } | |
1478 | ||
1479 | dev->tgt_active_prot = NFC_PROTO_NFC_DEP; | |
1480 | ||
1481 | /* ATR_RES general bytes are located at offset 17 */ | |
1482 | target_gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 17; | |
1483 | rc = nfc_set_remote_general_bytes(dev->nfc_dev, | |
1484 | resp->gt, target_gt_len); | |
1485 | if (rc == 0) | |
1486 | rc = nfc_dep_link_is_up(dev->nfc_dev, | |
1487 | dev->nfc_dev->targets[0].idx, | |
1488 | !cmd->active, NFC_RF_INITIATOR); | |
1489 | ||
1490 | return 0; | |
1491 | } | |
1492 | ||
90099433 | 1493 | static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target, |
47807d3d | 1494 | u8 comm_mode, u8* gb, size_t gb_len) |
361f3cb7 SO |
1495 | { |
1496 | struct pn533 *dev = nfc_get_drvdata(nfc_dev); | |
1497 | struct pn533_cmd_jump_dep *cmd; | |
47807d3d | 1498 | u8 cmd_len; |
361f3cb7 SO |
1499 | int rc; |
1500 | ||
1501 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
1502 | ||
361f3cb7 SO |
1503 | if (dev->poll_mod_count) { |
1504 | nfc_dev_err(&dev->interface->dev, | |
1505 | "Cannot bring the DEP link up while polling"); | |
1506 | return -EBUSY; | |
1507 | } | |
1508 | ||
1509 | if (dev->tgt_active_prot) { | |
1510 | nfc_dev_err(&dev->interface->dev, | |
1511 | "There is already an active target"); | |
1512 | return -EBUSY; | |
1513 | } | |
1514 | ||
47807d3d | 1515 | cmd_len = sizeof(struct pn533_cmd_jump_dep) + gb_len; |
361f3cb7 SO |
1516 | cmd = kzalloc(cmd_len, GFP_KERNEL); |
1517 | if (cmd == NULL) | |
1518 | return -ENOMEM; | |
1519 | ||
1520 | pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_JUMP_FOR_DEP); | |
1521 | ||
1522 | cmd->active = !comm_mode; | |
1523 | cmd->baud = 0; | |
47807d3d | 1524 | if (gb != NULL && gb_len > 0) { |
361f3cb7 | 1525 | cmd->next = 4; /* We have some Gi */ |
47807d3d | 1526 | memcpy(cmd->gt, gb, gb_len); |
361f3cb7 SO |
1527 | } else { |
1528 | cmd->next = 0; | |
1529 | } | |
1530 | ||
1531 | memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), cmd, cmd_len); | |
1532 | dev->out_frame->datalen += cmd_len; | |
1533 | ||
1534 | pn533_tx_frame_finish(dev->out_frame); | |
1535 | ||
1536 | rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame, | |
1537 | dev->in_maxlen, pn533_in_dep_link_up_complete, | |
1538 | cmd, GFP_KERNEL); | |
1539 | if (rc) | |
1540 | goto out; | |
1541 | ||
1542 | ||
1543 | out: | |
1544 | kfree(cmd); | |
1545 | ||
1546 | return rc; | |
1547 | } | |
1548 | ||
1549 | static int pn533_dep_link_down(struct nfc_dev *nfc_dev) | |
1550 | { | |
1551 | pn533_deactivate_target(nfc_dev, 0); | |
1552 | ||
1553 | return 0; | |
1554 | } | |
1555 | ||
c46ee386 AAJ |
1556 | #define PN533_CMD_DATAEXCH_HEAD_LEN (sizeof(struct pn533_frame) + 3) |
1557 | #define PN533_CMD_DATAEXCH_DATA_MAXLEN 262 | |
1558 | ||
1559 | static int pn533_data_exchange_tx_frame(struct pn533 *dev, struct sk_buff *skb) | |
1560 | { | |
1561 | int payload_len = skb->len; | |
1562 | struct pn533_frame *out_frame; | |
c46ee386 AAJ |
1563 | u8 tg; |
1564 | ||
1565 | nfc_dev_dbg(&dev->interface->dev, "%s - Sending %d bytes", __func__, | |
1566 | payload_len); | |
1567 | ||
1568 | if (payload_len > PN533_CMD_DATAEXCH_DATA_MAXLEN) { | |
1569 | /* TODO: Implement support to multi-part data exchange */ | |
1570 | nfc_dev_err(&dev->interface->dev, "Data length greater than the" | |
1571 | " max allowed: %d", | |
1572 | PN533_CMD_DATAEXCH_DATA_MAXLEN); | |
1573 | return -ENOSYS; | |
1574 | } | |
1575 | ||
c46ee386 AAJ |
1576 | skb_push(skb, PN533_CMD_DATAEXCH_HEAD_LEN); |
1577 | out_frame = (struct pn533_frame *) skb->data; | |
1578 | ||
1579 | pn533_tx_frame_init(out_frame, PN533_CMD_IN_DATA_EXCHANGE); | |
1580 | ||
1581 | tg = 1; | |
1582 | memcpy(PN533_FRAME_CMD_PARAMS_PTR(out_frame), &tg, sizeof(u8)); | |
1583 | out_frame->datalen += sizeof(u8); | |
1584 | ||
1585 | /* The data is already in the out_frame, just update the datalen */ | |
1586 | out_frame->datalen += payload_len; | |
1587 | ||
1588 | pn533_tx_frame_finish(out_frame); | |
1589 | skb_put(skb, PN533_FRAME_TAIL_SIZE); | |
1590 | ||
1591 | return 0; | |
1592 | } | |
1593 | ||
1594 | struct pn533_data_exchange_arg { | |
1595 | struct sk_buff *skb_resp; | |
1596 | struct sk_buff *skb_out; | |
1597 | data_exchange_cb_t cb; | |
1598 | void *cb_context; | |
1599 | }; | |
1600 | ||
6ff73fd2 SO |
1601 | static struct sk_buff *pn533_build_response(struct pn533 *dev) |
1602 | { | |
1603 | struct sk_buff *skb, *tmp, *t; | |
1604 | unsigned int skb_len = 0, tmp_len = 0; | |
1605 | ||
1606 | nfc_dev_dbg(&dev->interface->dev, "%s\n", __func__); | |
1607 | ||
1608 | if (skb_queue_empty(&dev->resp_q)) | |
1609 | return NULL; | |
1610 | ||
1611 | if (skb_queue_len(&dev->resp_q) == 1) { | |
1612 | skb = skb_dequeue(&dev->resp_q); | |
1613 | goto out; | |
1614 | } | |
1615 | ||
1616 | skb_queue_walk_safe(&dev->resp_q, tmp, t) | |
1617 | skb_len += tmp->len; | |
1618 | ||
1619 | nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n", | |
1620 | __func__, skb_len); | |
1621 | ||
1622 | skb = alloc_skb(skb_len, GFP_KERNEL); | |
1623 | if (skb == NULL) | |
1624 | goto out; | |
1625 | ||
1626 | skb_put(skb, skb_len); | |
1627 | ||
1628 | skb_queue_walk_safe(&dev->resp_q, tmp, t) { | |
1629 | memcpy(skb->data + tmp_len, tmp->data, tmp->len); | |
1630 | tmp_len += tmp->len; | |
1631 | } | |
1632 | ||
1633 | out: | |
1634 | skb_queue_purge(&dev->resp_q); | |
1635 | ||
1636 | return skb; | |
1637 | } | |
1638 | ||
c46ee386 AAJ |
1639 | static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg, |
1640 | u8 *params, int params_len) | |
1641 | { | |
1642 | struct pn533_data_exchange_arg *arg = _arg; | |
6ff73fd2 | 1643 | struct sk_buff *skb = NULL, *skb_resp = arg->skb_resp; |
c46ee386 AAJ |
1644 | struct pn533_frame *in_frame = (struct pn533_frame *) skb_resp->data; |
1645 | int err = 0; | |
1646 | u8 status; | |
1647 | u8 cmd_ret; | |
1648 | ||
1649 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
1650 | ||
6ff73fd2 | 1651 | dev_kfree_skb(arg->skb_out); |
c46ee386 AAJ |
1652 | |
1653 | if (params_len < 0) { /* error */ | |
1654 | err = params_len; | |
1655 | goto error; | |
1656 | } | |
1657 | ||
c46ee386 AAJ |
1658 | status = params[0]; |
1659 | ||
1660 | cmd_ret = status & PN533_CMD_RET_MASK; | |
1661 | if (cmd_ret != PN533_CMD_RET_SUCCESS) { | |
1662 | nfc_dev_err(&dev->interface->dev, "PN533 reported error %d when" | |
1663 | " exchanging data", cmd_ret); | |
1664 | err = -EIO; | |
1665 | goto error; | |
1666 | } | |
1667 | ||
6ff73fd2 SO |
1668 | skb_put(skb_resp, PN533_FRAME_SIZE(in_frame)); |
1669 | skb_pull(skb_resp, PN533_CMD_DATAEXCH_HEAD_LEN); | |
1670 | skb_trim(skb_resp, skb_resp->len - PN533_FRAME_TAIL_SIZE); | |
1671 | skb_queue_tail(&dev->resp_q, skb_resp); | |
1672 | ||
c46ee386 | 1673 | if (status & PN533_CMD_MI_MASK) { |
6ff73fd2 SO |
1674 | queue_work(dev->wq, &dev->mi_work); |
1675 | return -EINPROGRESS; | |
c46ee386 AAJ |
1676 | } |
1677 | ||
6ff73fd2 SO |
1678 | skb = pn533_build_response(dev); |
1679 | if (skb == NULL) | |
1680 | goto error; | |
c46ee386 | 1681 | |
6ff73fd2 | 1682 | arg->cb(arg->cb_context, skb, 0); |
c46ee386 AAJ |
1683 | kfree(arg); |
1684 | return 0; | |
1685 | ||
1686 | error: | |
6ff73fd2 SO |
1687 | skb_queue_purge(&dev->resp_q); |
1688 | dev_kfree_skb(skb_resp); | |
c46ee386 AAJ |
1689 | arg->cb(arg->cb_context, NULL, err); |
1690 | kfree(arg); | |
1691 | return 0; | |
1692 | } | |
1693 | ||
be9ae4ce SO |
1694 | static int pn533_transceive(struct nfc_dev *nfc_dev, |
1695 | struct nfc_target *target, struct sk_buff *skb, | |
1696 | data_exchange_cb_t cb, void *cb_context) | |
c46ee386 AAJ |
1697 | { |
1698 | struct pn533 *dev = nfc_get_drvdata(nfc_dev); | |
1699 | struct pn533_frame *out_frame, *in_frame; | |
1700 | struct pn533_data_exchange_arg *arg; | |
1701 | struct sk_buff *skb_resp; | |
1702 | int skb_resp_len; | |
1703 | int rc; | |
1704 | ||
1705 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
1706 | ||
1707 | if (!dev->tgt_active_prot) { | |
1708 | nfc_dev_err(&dev->interface->dev, "Cannot exchange data if" | |
1709 | " there is no active target"); | |
1710 | rc = -EINVAL; | |
1711 | goto error; | |
1712 | } | |
1713 | ||
1714 | rc = pn533_data_exchange_tx_frame(dev, skb); | |
1715 | if (rc) | |
1716 | goto error; | |
1717 | ||
1718 | skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN + | |
1719 | PN533_CMD_DATAEXCH_DATA_MAXLEN + | |
1720 | PN533_FRAME_TAIL_SIZE; | |
1721 | ||
7c7cd3bf | 1722 | skb_resp = nfc_alloc_recv_skb(skb_resp_len, GFP_KERNEL); |
c46ee386 AAJ |
1723 | if (!skb_resp) { |
1724 | rc = -ENOMEM; | |
1725 | goto error; | |
1726 | } | |
1727 | ||
1728 | in_frame = (struct pn533_frame *) skb_resp->data; | |
1729 | out_frame = (struct pn533_frame *) skb->data; | |
1730 | ||
1731 | arg = kmalloc(sizeof(struct pn533_data_exchange_arg), GFP_KERNEL); | |
1732 | if (!arg) { | |
1733 | rc = -ENOMEM; | |
1734 | goto free_skb_resp; | |
1735 | } | |
1736 | ||
1737 | arg->skb_resp = skb_resp; | |
1738 | arg->skb_out = skb; | |
1739 | arg->cb = cb; | |
1740 | arg->cb_context = cb_context; | |
1741 | ||
1742 | rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, skb_resp_len, | |
1743 | pn533_data_exchange_complete, arg, | |
1744 | GFP_KERNEL); | |
1745 | if (rc) { | |
1746 | nfc_dev_err(&dev->interface->dev, "Error %d when trying to" | |
1747 | " perform data_exchange", rc); | |
1748 | goto free_arg; | |
1749 | } | |
1750 | ||
1751 | return 0; | |
1752 | ||
1753 | free_arg: | |
1754 | kfree(arg); | |
1755 | free_skb_resp: | |
1756 | kfree_skb(skb_resp); | |
1757 | error: | |
1758 | kfree_skb(skb); | |
1759 | return rc; | |
1760 | } | |
1761 | ||
6ff73fd2 SO |
1762 | static void pn533_wq_mi_recv(struct work_struct *work) |
1763 | { | |
1764 | struct pn533 *dev = container_of(work, struct pn533, mi_work); | |
1765 | struct sk_buff *skb_cmd; | |
1766 | struct pn533_data_exchange_arg *arg = dev->cmd_complete_arg; | |
1767 | struct pn533_frame *out_frame, *in_frame; | |
1768 | struct sk_buff *skb_resp; | |
1769 | int skb_resp_len; | |
1770 | int rc; | |
1771 | ||
1772 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
1773 | ||
1774 | /* This is a zero payload size skb */ | |
1775 | skb_cmd = alloc_skb(PN533_CMD_DATAEXCH_HEAD_LEN + PN533_FRAME_TAIL_SIZE, | |
1776 | GFP_KERNEL); | |
1777 | if (skb_cmd == NULL) | |
1778 | goto error_cmd; | |
1779 | ||
1780 | skb_reserve(skb_cmd, PN533_CMD_DATAEXCH_HEAD_LEN); | |
1781 | ||
1782 | rc = pn533_data_exchange_tx_frame(dev, skb_cmd); | |
1783 | if (rc) | |
1784 | goto error_frame; | |
1785 | ||
1786 | skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN + | |
1787 | PN533_CMD_DATAEXCH_DATA_MAXLEN + | |
1788 | PN533_FRAME_TAIL_SIZE; | |
1789 | skb_resp = alloc_skb(skb_resp_len, GFP_KERNEL); | |
1790 | if (!skb_resp) { | |
1791 | rc = -ENOMEM; | |
1792 | goto error_frame; | |
1793 | } | |
1794 | ||
1795 | in_frame = (struct pn533_frame *) skb_resp->data; | |
1796 | out_frame = (struct pn533_frame *) skb_cmd->data; | |
1797 | ||
1798 | arg->skb_resp = skb_resp; | |
1799 | arg->skb_out = skb_cmd; | |
1800 | ||
1801 | rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame, | |
1802 | skb_resp_len, | |
1803 | pn533_data_exchange_complete, | |
1804 | dev->cmd_complete_arg, GFP_KERNEL); | |
1805 | if (!rc) | |
1806 | return; | |
1807 | ||
1808 | nfc_dev_err(&dev->interface->dev, "Error %d when trying to" | |
1809 | " perform data_exchange", rc); | |
1810 | ||
1811 | kfree_skb(skb_resp); | |
1812 | ||
1813 | error_frame: | |
1814 | kfree_skb(skb_cmd); | |
1815 | ||
1816 | error_cmd: | |
1817 | pn533_send_ack(dev, GFP_KERNEL); | |
1818 | ||
1819 | kfree(arg); | |
1820 | ||
1821 | up(&dev->cmd_lock); | |
1822 | } | |
1823 | ||
c46ee386 AAJ |
1824 | static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata, |
1825 | u8 cfgdata_len) | |
1826 | { | |
1827 | int rc; | |
1828 | u8 *params; | |
1829 | ||
1830 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
1831 | ||
1832 | pn533_tx_frame_init(dev->out_frame, PN533_CMD_RF_CONFIGURATION); | |
1833 | ||
1834 | params = PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame); | |
1835 | params[0] = cfgitem; | |
1836 | memcpy(¶ms[1], cfgdata, cfgdata_len); | |
1837 | dev->out_frame->datalen += (1 + cfgdata_len); | |
1838 | ||
1839 | pn533_tx_frame_finish(dev->out_frame); | |
1840 | ||
1841 | rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame, | |
1842 | dev->in_maxlen); | |
1843 | ||
1844 | return rc; | |
1845 | } | |
1846 | ||
1847 | struct nfc_ops pn533_nfc_ops = { | |
8b3fe7b5 IE |
1848 | .dev_up = NULL, |
1849 | .dev_down = NULL, | |
361f3cb7 SO |
1850 | .dep_link_up = pn533_dep_link_up, |
1851 | .dep_link_down = pn533_dep_link_down, | |
c46ee386 AAJ |
1852 | .start_poll = pn533_start_poll, |
1853 | .stop_poll = pn533_stop_poll, | |
1854 | .activate_target = pn533_activate_target, | |
1855 | .deactivate_target = pn533_deactivate_target, | |
be9ae4ce | 1856 | .im_transceive = pn533_transceive, |
c46ee386 AAJ |
1857 | }; |
1858 | ||
1859 | static int pn533_probe(struct usb_interface *interface, | |
1860 | const struct usb_device_id *id) | |
1861 | { | |
1862 | struct pn533_fw_version *fw_ver; | |
1863 | struct pn533 *dev; | |
1864 | struct usb_host_interface *iface_desc; | |
1865 | struct usb_endpoint_descriptor *endpoint; | |
1866 | struct pn533_config_max_retries max_retries; | |
1867 | int in_endpoint = 0; | |
1868 | int out_endpoint = 0; | |
1869 | int rc = -ENOMEM; | |
1870 | int i; | |
1871 | u32 protocols; | |
1872 | ||
1873 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
1874 | if (!dev) | |
1875 | return -ENOMEM; | |
1876 | ||
1877 | dev->udev = usb_get_dev(interface_to_usbdev(interface)); | |
1878 | dev->interface = interface; | |
1879 | sema_init(&dev->cmd_lock, 1); | |
1880 | ||
1881 | iface_desc = interface->cur_altsetting; | |
1882 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
1883 | endpoint = &iface_desc->endpoint[i].desc; | |
1884 | ||
1885 | if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint)) { | |
1886 | dev->in_maxlen = le16_to_cpu(endpoint->wMaxPacketSize); | |
1887 | in_endpoint = endpoint->bEndpointAddress; | |
1888 | } | |
1889 | ||
1890 | if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint)) { | |
1891 | dev->out_maxlen = | |
1892 | le16_to_cpu(endpoint->wMaxPacketSize); | |
1893 | out_endpoint = endpoint->bEndpointAddress; | |
1894 | } | |
1895 | } | |
1896 | ||
1897 | if (!in_endpoint || !out_endpoint) { | |
1898 | nfc_dev_err(&interface->dev, "Could not find bulk-in or" | |
1899 | " bulk-out endpoint"); | |
1900 | rc = -ENODEV; | |
1901 | goto error; | |
1902 | } | |
1903 | ||
1904 | dev->in_frame = kmalloc(dev->in_maxlen, GFP_KERNEL); | |
1905 | dev->in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
1906 | dev->out_frame = kmalloc(dev->out_maxlen, GFP_KERNEL); | |
1907 | dev->out_urb = usb_alloc_urb(0, GFP_KERNEL); | |
1908 | ||
1909 | if (!dev->in_frame || !dev->out_frame || | |
1910 | !dev->in_urb || !dev->out_urb) | |
1911 | goto error; | |
1912 | ||
1913 | usb_fill_bulk_urb(dev->in_urb, dev->udev, | |
1914 | usb_rcvbulkpipe(dev->udev, in_endpoint), | |
1915 | NULL, 0, NULL, dev); | |
1916 | usb_fill_bulk_urb(dev->out_urb, dev->udev, | |
1917 | usb_sndbulkpipe(dev->udev, out_endpoint), | |
1918 | NULL, 0, | |
1919 | pn533_send_complete, dev); | |
1920 | ||
4849f85e | 1921 | INIT_WORK(&dev->cmd_work, pn533_wq_cmd_complete); |
6ff73fd2 SO |
1922 | INIT_WORK(&dev->mi_work, pn533_wq_mi_recv); |
1923 | dev->wq = alloc_workqueue("pn533", | |
1924 | WQ_NON_REENTRANT | WQ_UNBOUND | WQ_MEM_RECLAIM, | |
1925 | 1); | |
4849f85e SO |
1926 | if (dev->wq == NULL) |
1927 | goto error; | |
c46ee386 | 1928 | |
6ff73fd2 SO |
1929 | skb_queue_head_init(&dev->resp_q); |
1930 | ||
c46ee386 AAJ |
1931 | usb_set_intfdata(interface, dev); |
1932 | ||
1933 | pn533_tx_frame_init(dev->out_frame, PN533_CMD_GET_FIRMWARE_VERSION); | |
1934 | pn533_tx_frame_finish(dev->out_frame); | |
1935 | ||
1936 | rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame, | |
1937 | dev->in_maxlen); | |
1938 | if (rc) | |
4849f85e | 1939 | goto destroy_wq; |
c46ee386 AAJ |
1940 | |
1941 | fw_ver = (struct pn533_fw_version *) | |
1942 | PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame); | |
1943 | nfc_dev_info(&dev->interface->dev, "NXP PN533 firmware ver %d.%d now" | |
1944 | " attached", fw_ver->ver, fw_ver->rev); | |
1945 | ||
1946 | protocols = NFC_PROTO_JEWEL_MASK | |
1947 | | NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK | |
1948 | | NFC_PROTO_ISO14443_MASK | |
1949 | | NFC_PROTO_NFC_DEP_MASK; | |
1950 | ||
e8753043 SO |
1951 | dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols, |
1952 | PN533_CMD_DATAEXCH_HEAD_LEN, | |
1953 | PN533_FRAME_TAIL_SIZE); | |
c46ee386 | 1954 | if (!dev->nfc_dev) |
4849f85e | 1955 | goto destroy_wq; |
c46ee386 AAJ |
1956 | |
1957 | nfc_set_parent_dev(dev->nfc_dev, &interface->dev); | |
1958 | nfc_set_drvdata(dev->nfc_dev, dev); | |
1959 | ||
1960 | rc = nfc_register_device(dev->nfc_dev); | |
1961 | if (rc) | |
1962 | goto free_nfc_dev; | |
1963 | ||
1964 | max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS; | |
1965 | max_retries.mx_rty_psl = 2; | |
1966 | max_retries.mx_rty_passive_act = PN533_CONFIG_MAX_RETRIES_NO_RETRY; | |
1967 | ||
1968 | rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES, | |
1969 | (u8 *) &max_retries, sizeof(max_retries)); | |
1970 | ||
1971 | if (rc) { | |
1972 | nfc_dev_err(&dev->interface->dev, "Error on setting MAX_RETRIES" | |
1973 | " config"); | |
1974 | goto free_nfc_dev; | |
1975 | } | |
1976 | ||
1977 | return 0; | |
1978 | ||
1979 | free_nfc_dev: | |
1980 | nfc_free_device(dev->nfc_dev); | |
4849f85e SO |
1981 | destroy_wq: |
1982 | destroy_workqueue(dev->wq); | |
c46ee386 AAJ |
1983 | error: |
1984 | kfree(dev->in_frame); | |
1985 | usb_free_urb(dev->in_urb); | |
1986 | kfree(dev->out_frame); | |
1987 | usb_free_urb(dev->out_urb); | |
1988 | kfree(dev); | |
1989 | return rc; | |
1990 | } | |
1991 | ||
1992 | static void pn533_disconnect(struct usb_interface *interface) | |
1993 | { | |
1994 | struct pn533 *dev; | |
1995 | ||
1996 | dev = usb_get_intfdata(interface); | |
1997 | usb_set_intfdata(interface, NULL); | |
1998 | ||
1999 | nfc_unregister_device(dev->nfc_dev); | |
2000 | nfc_free_device(dev->nfc_dev); | |
2001 | ||
2002 | usb_kill_urb(dev->in_urb); | |
2003 | usb_kill_urb(dev->out_urb); | |
2004 | ||
4849f85e | 2005 | destroy_workqueue(dev->wq); |
c46ee386 | 2006 | |
6ff73fd2 SO |
2007 | skb_queue_purge(&dev->resp_q); |
2008 | ||
c46ee386 AAJ |
2009 | kfree(dev->in_frame); |
2010 | usb_free_urb(dev->in_urb); | |
2011 | kfree(dev->out_frame); | |
2012 | usb_free_urb(dev->out_urb); | |
2013 | kfree(dev); | |
2014 | ||
276556db | 2015 | nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected"); |
c46ee386 AAJ |
2016 | } |
2017 | ||
2018 | static struct usb_driver pn533_driver = { | |
2019 | .name = "pn533", | |
2020 | .probe = pn533_probe, | |
2021 | .disconnect = pn533_disconnect, | |
2022 | .id_table = pn533_table, | |
2023 | }; | |
2024 | ||
fe748483 | 2025 | module_usb_driver(pn533_driver); |
c46ee386 AAJ |
2026 | |
2027 | MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>," | |
2028 | " Aloisio Almeida Jr <aloisio.almeida@openbossa.org>"); | |
2029 | MODULE_DESCRIPTION("PN533 usb driver ver " VERSION); | |
2030 | MODULE_VERSION(VERSION); | |
2031 | MODULE_LICENSE("GPL"); |