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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> | |
31 | #include <net/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 | 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 | |
75 | ||
76 | #define PN533_CMD_RESPONSE(cmd) (cmd + 1) | |
77 | ||
78 | /* PN533 Return codes */ | |
79 | #define PN533_CMD_RET_MASK 0x3F | |
80 | #define PN533_CMD_MI_MASK 0x40 | |
81 | #define PN533_CMD_RET_SUCCESS 0x00 | |
82 | ||
83 | struct pn533; | |
84 | ||
85 | typedef int (*pn533_cmd_complete_t) (struct pn533 *dev, void *arg, | |
86 | u8 *params, int params_len); | |
87 | ||
88 | /* structs for pn533 commands */ | |
89 | ||
90 | /* PN533_CMD_GET_FIRMWARE_VERSION */ | |
91 | struct pn533_fw_version { | |
92 | u8 ic; | |
93 | u8 ver; | |
94 | u8 rev; | |
95 | u8 support; | |
96 | }; | |
97 | ||
98 | /* PN533_CMD_RF_CONFIGURATION */ | |
99 | #define PN533_CFGITEM_MAX_RETRIES 0x05 | |
100 | ||
101 | #define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00 | |
102 | #define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF | |
103 | ||
104 | struct pn533_config_max_retries { | |
105 | u8 mx_rty_atr; | |
106 | u8 mx_rty_psl; | |
107 | u8 mx_rty_passive_act; | |
108 | } __packed; | |
109 | ||
110 | /* PN533_CMD_IN_LIST_PASSIVE_TARGET */ | |
111 | ||
112 | /* felica commands opcode */ | |
113 | #define PN533_FELICA_OPC_SENSF_REQ 0 | |
114 | #define PN533_FELICA_OPC_SENSF_RES 1 | |
115 | /* felica SENSF_REQ parameters */ | |
116 | #define PN533_FELICA_SENSF_SC_ALL 0xFFFF | |
117 | #define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0 | |
118 | #define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1 | |
119 | #define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2 | |
120 | ||
121 | /* type B initiator_data values */ | |
122 | #define PN533_TYPE_B_AFI_ALL_FAMILIES 0 | |
123 | #define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0 | |
124 | #define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1 | |
125 | ||
126 | union pn533_cmd_poll_initdata { | |
127 | struct { | |
128 | u8 afi; | |
129 | u8 polling_method; | |
130 | } __packed type_b; | |
131 | struct { | |
132 | u8 opcode; | |
133 | __be16 sc; | |
134 | u8 rc; | |
135 | u8 tsn; | |
136 | } __packed felica; | |
137 | }; | |
138 | ||
139 | /* Poll modulations */ | |
140 | enum { | |
141 | PN533_POLL_MOD_106KBPS_A, | |
142 | PN533_POLL_MOD_212KBPS_FELICA, | |
143 | PN533_POLL_MOD_424KBPS_FELICA, | |
144 | PN533_POLL_MOD_106KBPS_JEWEL, | |
145 | PN533_POLL_MOD_847KBPS_B, | |
146 | ||
147 | __PN533_POLL_MOD_AFTER_LAST, | |
148 | }; | |
149 | #define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1) | |
150 | ||
151 | struct pn533_poll_modulations { | |
152 | struct { | |
153 | u8 maxtg; | |
154 | u8 brty; | |
155 | union pn533_cmd_poll_initdata initiator_data; | |
156 | } __packed data; | |
157 | u8 len; | |
158 | }; | |
159 | ||
160 | const struct pn533_poll_modulations poll_mod[] = { | |
161 | [PN533_POLL_MOD_106KBPS_A] = { | |
162 | .data = { | |
163 | .maxtg = 1, | |
164 | .brty = 0, | |
165 | }, | |
166 | .len = 2, | |
167 | }, | |
168 | [PN533_POLL_MOD_212KBPS_FELICA] = { | |
169 | .data = { | |
170 | .maxtg = 1, | |
171 | .brty = 1, | |
172 | .initiator_data.felica = { | |
173 | .opcode = PN533_FELICA_OPC_SENSF_REQ, | |
174 | .sc = PN533_FELICA_SENSF_SC_ALL, | |
175 | .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE, | |
176 | .tsn = 0, | |
177 | }, | |
178 | }, | |
179 | .len = 7, | |
180 | }, | |
181 | [PN533_POLL_MOD_424KBPS_FELICA] = { | |
182 | .data = { | |
183 | .maxtg = 1, | |
184 | .brty = 2, | |
185 | .initiator_data.felica = { | |
186 | .opcode = PN533_FELICA_OPC_SENSF_REQ, | |
187 | .sc = PN533_FELICA_SENSF_SC_ALL, | |
188 | .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE, | |
189 | .tsn = 0, | |
190 | }, | |
191 | }, | |
192 | .len = 7, | |
193 | }, | |
194 | [PN533_POLL_MOD_106KBPS_JEWEL] = { | |
195 | .data = { | |
196 | .maxtg = 1, | |
197 | .brty = 4, | |
198 | }, | |
199 | .len = 2, | |
200 | }, | |
201 | [PN533_POLL_MOD_847KBPS_B] = { | |
202 | .data = { | |
203 | .maxtg = 1, | |
204 | .brty = 8, | |
205 | .initiator_data.type_b = { | |
206 | .afi = PN533_TYPE_B_AFI_ALL_FAMILIES, | |
207 | .polling_method = | |
208 | PN533_TYPE_B_POLL_METHOD_TIMESLOT, | |
209 | }, | |
210 | }, | |
211 | .len = 3, | |
212 | }, | |
213 | }; | |
214 | ||
215 | /* PN533_CMD_IN_ATR */ | |
216 | ||
217 | struct pn533_cmd_activate_param { | |
218 | u8 tg; | |
219 | u8 next; | |
220 | } __packed; | |
221 | ||
222 | struct pn533_cmd_activate_response { | |
223 | u8 status; | |
224 | u8 nfcid3t[10]; | |
225 | u8 didt; | |
226 | u8 bst; | |
227 | u8 brt; | |
228 | u8 to; | |
229 | u8 ppt; | |
230 | /* optional */ | |
231 | u8 gt[]; | |
232 | } __packed; | |
233 | ||
234 | ||
235 | struct pn533 { | |
236 | struct usb_device *udev; | |
237 | struct usb_interface *interface; | |
238 | struct nfc_dev *nfc_dev; | |
239 | ||
240 | struct urb *out_urb; | |
241 | int out_maxlen; | |
242 | struct pn533_frame *out_frame; | |
243 | ||
244 | struct urb *in_urb; | |
245 | int in_maxlen; | |
246 | struct pn533_frame *in_frame; | |
247 | ||
248 | struct tasklet_struct tasklet; | |
249 | struct pn533_frame *tklt_in_frame; | |
250 | int tklt_in_error; | |
251 | ||
252 | pn533_cmd_complete_t cmd_complete; | |
253 | void *cmd_complete_arg; | |
254 | struct semaphore cmd_lock; | |
255 | u8 cmd; | |
256 | ||
257 | struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1]; | |
258 | u8 poll_mod_count; | |
259 | u8 poll_mod_curr; | |
260 | u32 poll_protocols; | |
261 | ||
262 | u8 tgt_available_prots; | |
263 | u8 tgt_active_prot; | |
264 | }; | |
265 | ||
266 | struct pn533_frame { | |
267 | u8 preamble; | |
268 | __be16 start_frame; | |
269 | u8 datalen; | |
270 | u8 datalen_checksum; | |
271 | u8 data[]; | |
272 | } __packed; | |
273 | ||
274 | /* The rule: value + checksum = 0 */ | |
275 | static inline u8 pn533_checksum(u8 value) | |
276 | { | |
277 | return ~value + 1; | |
278 | } | |
279 | ||
280 | /* The rule: sum(data elements) + checksum = 0 */ | |
281 | static u8 pn533_data_checksum(u8 *data, int datalen) | |
282 | { | |
283 | u8 sum = 0; | |
284 | int i; | |
285 | ||
286 | for (i = 0; i < datalen; i++) | |
287 | sum += data[i]; | |
288 | ||
289 | return pn533_checksum(sum); | |
290 | } | |
291 | ||
292 | /** | |
293 | * pn533_tx_frame_ack - create a ack frame | |
294 | * @frame: The frame to be set as ack | |
295 | * | |
296 | * Ack is different type of standard frame. As a standard frame, it has | |
297 | * preamble and start_frame. However the checksum of this frame must fail, | |
298 | * i.e. datalen + datalen_checksum must NOT be zero. When the checksum test | |
299 | * fails and datalen = 0 and datalen_checksum = 0xFF, the frame is a ack. | |
300 | * After datalen_checksum field, the postamble is placed. | |
301 | */ | |
302 | static void pn533_tx_frame_ack(struct pn533_frame *frame) | |
303 | { | |
304 | frame->preamble = 0; | |
305 | frame->start_frame = cpu_to_be16(PN533_SOF); | |
306 | frame->datalen = 0; | |
307 | frame->datalen_checksum = 0xFF; | |
308 | /* data[0] is used as postamble */ | |
309 | frame->data[0] = 0; | |
310 | } | |
311 | ||
312 | static void pn533_tx_frame_init(struct pn533_frame *frame, u8 cmd) | |
313 | { | |
314 | frame->preamble = 0; | |
315 | frame->start_frame = cpu_to_be16(PN533_SOF); | |
316 | PN533_FRAME_IDENTIFIER(frame) = PN533_DIR_OUT; | |
317 | PN533_FRAME_CMD(frame) = cmd; | |
318 | frame->datalen = 2; | |
319 | } | |
320 | ||
321 | static void pn533_tx_frame_finish(struct pn533_frame *frame) | |
322 | { | |
323 | frame->datalen_checksum = pn533_checksum(frame->datalen); | |
324 | ||
325 | PN533_FRAME_CHECKSUM(frame) = | |
326 | pn533_data_checksum(frame->data, frame->datalen); | |
327 | ||
328 | PN533_FRAME_POSTAMBLE(frame) = 0; | |
329 | } | |
330 | ||
331 | static bool pn533_rx_frame_is_valid(struct pn533_frame *frame) | |
332 | { | |
333 | u8 checksum; | |
334 | ||
335 | if (frame->start_frame != cpu_to_be16(PN533_SOF)) | |
336 | return false; | |
337 | ||
338 | checksum = pn533_checksum(frame->datalen); | |
339 | if (checksum != frame->datalen_checksum) | |
340 | return false; | |
341 | ||
342 | checksum = pn533_data_checksum(frame->data, frame->datalen); | |
343 | if (checksum != PN533_FRAME_CHECKSUM(frame)) | |
344 | return false; | |
345 | ||
346 | return true; | |
347 | } | |
348 | ||
349 | static bool pn533_rx_frame_is_ack(struct pn533_frame *frame) | |
350 | { | |
351 | if (frame->start_frame != cpu_to_be16(PN533_SOF)) | |
352 | return false; | |
353 | ||
354 | if (frame->datalen != 0 || frame->datalen_checksum != 0xFF) | |
355 | return false; | |
356 | ||
357 | return true; | |
358 | } | |
359 | ||
360 | static bool pn533_rx_frame_is_cmd_response(struct pn533_frame *frame, u8 cmd) | |
361 | { | |
362 | return (PN533_FRAME_CMD(frame) == PN533_CMD_RESPONSE(cmd)); | |
363 | } | |
364 | ||
365 | static void pn533_tasklet_cmd_complete(unsigned long arg) | |
366 | { | |
367 | struct pn533 *dev = (struct pn533 *) arg; | |
368 | struct pn533_frame *in_frame = dev->tklt_in_frame; | |
369 | int rc; | |
370 | ||
371 | if (dev->tklt_in_error) | |
372 | rc = dev->cmd_complete(dev, dev->cmd_complete_arg, NULL, | |
373 | dev->tklt_in_error); | |
374 | else | |
375 | rc = dev->cmd_complete(dev, dev->cmd_complete_arg, | |
376 | PN533_FRAME_CMD_PARAMS_PTR(in_frame), | |
377 | PN533_FRAME_CMD_PARAMS_LEN(in_frame)); | |
378 | ||
379 | if (rc != -EINPROGRESS) | |
380 | up(&dev->cmd_lock); | |
381 | } | |
382 | ||
383 | static void pn533_recv_response(struct urb *urb) | |
384 | { | |
385 | struct pn533 *dev = urb->context; | |
386 | struct pn533_frame *in_frame; | |
387 | ||
388 | dev->tklt_in_frame = NULL; | |
389 | ||
390 | switch (urb->status) { | |
391 | case 0: | |
392 | /* success */ | |
393 | break; | |
394 | case -ECONNRESET: | |
395 | case -ENOENT: | |
396 | case -ESHUTDOWN: | |
397 | nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with" | |
398 | " status: %d", urb->status); | |
399 | dev->tklt_in_error = urb->status; | |
400 | goto sched_tasklet; | |
401 | default: | |
402 | nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:" | |
403 | " %d", urb->status); | |
404 | dev->tklt_in_error = urb->status; | |
405 | goto sched_tasklet; | |
406 | } | |
407 | ||
408 | in_frame = dev->in_urb->transfer_buffer; | |
409 | ||
410 | if (!pn533_rx_frame_is_valid(in_frame)) { | |
411 | nfc_dev_err(&dev->interface->dev, "Received an invalid frame"); | |
412 | dev->tklt_in_error = -EIO; | |
413 | goto sched_tasklet; | |
414 | } | |
415 | ||
416 | if (!pn533_rx_frame_is_cmd_response(in_frame, dev->cmd)) { | |
417 | nfc_dev_err(&dev->interface->dev, "The received frame is not " | |
418 | "response to the last command"); | |
419 | dev->tklt_in_error = -EIO; | |
420 | goto sched_tasklet; | |
421 | } | |
422 | ||
423 | nfc_dev_dbg(&dev->interface->dev, "Received a valid frame"); | |
424 | dev->tklt_in_error = 0; | |
425 | dev->tklt_in_frame = in_frame; | |
426 | ||
427 | sched_tasklet: | |
428 | tasklet_schedule(&dev->tasklet); | |
429 | } | |
430 | ||
431 | static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags) | |
432 | { | |
433 | dev->in_urb->complete = pn533_recv_response; | |
434 | ||
435 | return usb_submit_urb(dev->in_urb, flags); | |
436 | } | |
437 | ||
438 | static void pn533_recv_ack(struct urb *urb) | |
439 | { | |
440 | struct pn533 *dev = urb->context; | |
441 | struct pn533_frame *in_frame; | |
442 | int rc; | |
443 | ||
444 | switch (urb->status) { | |
445 | case 0: | |
446 | /* success */ | |
447 | break; | |
448 | case -ECONNRESET: | |
449 | case -ENOENT: | |
450 | case -ESHUTDOWN: | |
451 | nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with" | |
452 | " status: %d", urb->status); | |
453 | dev->tklt_in_error = urb->status; | |
454 | goto sched_tasklet; | |
455 | default: | |
456 | nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:" | |
457 | " %d", urb->status); | |
458 | dev->tklt_in_error = urb->status; | |
459 | goto sched_tasklet; | |
460 | } | |
461 | ||
462 | in_frame = dev->in_urb->transfer_buffer; | |
463 | ||
464 | if (!pn533_rx_frame_is_ack(in_frame)) { | |
465 | nfc_dev_err(&dev->interface->dev, "Received an invalid ack"); | |
466 | dev->tklt_in_error = -EIO; | |
467 | goto sched_tasklet; | |
468 | } | |
469 | ||
470 | nfc_dev_dbg(&dev->interface->dev, "Received a valid ack"); | |
471 | ||
472 | rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC); | |
473 | if (rc) { | |
474 | nfc_dev_err(&dev->interface->dev, "usb_submit_urb failed with" | |
475 | " result %d", rc); | |
476 | dev->tklt_in_error = rc; | |
477 | goto sched_tasklet; | |
478 | } | |
479 | ||
480 | return; | |
481 | ||
482 | sched_tasklet: | |
483 | dev->tklt_in_frame = NULL; | |
484 | tasklet_schedule(&dev->tasklet); | |
485 | } | |
486 | ||
487 | static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags) | |
488 | { | |
489 | dev->in_urb->complete = pn533_recv_ack; | |
490 | ||
491 | return usb_submit_urb(dev->in_urb, flags); | |
492 | } | |
493 | ||
494 | static int pn533_send_ack(struct pn533 *dev, gfp_t flags) | |
495 | { | |
496 | int rc; | |
497 | ||
498 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
499 | ||
500 | pn533_tx_frame_ack(dev->out_frame); | |
501 | ||
502 | dev->out_urb->transfer_buffer = dev->out_frame; | |
503 | dev->out_urb->transfer_buffer_length = PN533_FRAME_ACK_SIZE; | |
504 | rc = usb_submit_urb(dev->out_urb, flags); | |
505 | ||
506 | return rc; | |
507 | } | |
508 | ||
509 | static int __pn533_send_cmd_frame_async(struct pn533 *dev, | |
510 | struct pn533_frame *out_frame, | |
511 | struct pn533_frame *in_frame, | |
512 | int in_frame_len, | |
513 | pn533_cmd_complete_t cmd_complete, | |
514 | void *arg, gfp_t flags) | |
515 | { | |
516 | int rc; | |
517 | ||
518 | nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x", | |
519 | PN533_FRAME_CMD(out_frame)); | |
520 | ||
521 | dev->cmd = PN533_FRAME_CMD(out_frame); | |
522 | dev->cmd_complete = cmd_complete; | |
523 | dev->cmd_complete_arg = arg; | |
524 | ||
525 | dev->out_urb->transfer_buffer = out_frame; | |
526 | dev->out_urb->transfer_buffer_length = | |
527 | PN533_FRAME_SIZE(out_frame); | |
528 | ||
529 | dev->in_urb->transfer_buffer = in_frame; | |
530 | dev->in_urb->transfer_buffer_length = in_frame_len; | |
531 | ||
532 | rc = usb_submit_urb(dev->out_urb, flags); | |
533 | if (rc) | |
534 | return rc; | |
535 | ||
536 | rc = pn533_submit_urb_for_ack(dev, flags); | |
537 | if (rc) | |
538 | goto error; | |
539 | ||
540 | return 0; | |
541 | ||
542 | error: | |
543 | usb_unlink_urb(dev->out_urb); | |
544 | return rc; | |
545 | } | |
546 | ||
547 | static int pn533_send_cmd_frame_async(struct pn533 *dev, | |
548 | struct pn533_frame *out_frame, | |
549 | struct pn533_frame *in_frame, | |
550 | int in_frame_len, | |
551 | pn533_cmd_complete_t cmd_complete, | |
552 | void *arg, gfp_t flags) | |
553 | { | |
554 | int rc; | |
555 | ||
556 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
557 | ||
558 | if (down_trylock(&dev->cmd_lock)) | |
559 | return -EBUSY; | |
560 | ||
561 | rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame, | |
562 | in_frame_len, cmd_complete, arg, flags); | |
563 | if (rc) | |
564 | goto error; | |
565 | ||
566 | return 0; | |
567 | error: | |
568 | up(&dev->cmd_lock); | |
569 | return rc; | |
570 | } | |
571 | ||
572 | struct pn533_sync_cmd_response { | |
573 | int rc; | |
574 | struct completion done; | |
575 | }; | |
576 | ||
577 | static int pn533_sync_cmd_complete(struct pn533 *dev, void *_arg, | |
578 | u8 *params, int params_len) | |
579 | { | |
580 | struct pn533_sync_cmd_response *arg = _arg; | |
581 | ||
582 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
583 | ||
584 | arg->rc = 0; | |
585 | ||
586 | if (params_len < 0) /* error */ | |
587 | arg->rc = params_len; | |
588 | ||
589 | complete(&arg->done); | |
590 | ||
591 | return 0; | |
592 | } | |
593 | ||
594 | static int pn533_send_cmd_frame_sync(struct pn533 *dev, | |
595 | struct pn533_frame *out_frame, | |
596 | struct pn533_frame *in_frame, | |
597 | int in_frame_len) | |
598 | { | |
599 | int rc; | |
600 | struct pn533_sync_cmd_response arg; | |
601 | ||
602 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
603 | ||
604 | init_completion(&arg.done); | |
605 | ||
606 | rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, in_frame_len, | |
607 | pn533_sync_cmd_complete, &arg, GFP_KERNEL); | |
608 | if (rc) | |
609 | return rc; | |
610 | ||
611 | wait_for_completion(&arg.done); | |
612 | ||
613 | return arg.rc; | |
614 | } | |
615 | ||
616 | static void pn533_send_complete(struct urb *urb) | |
617 | { | |
618 | struct pn533 *dev = urb->context; | |
619 | ||
620 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
621 | ||
622 | switch (urb->status) { | |
623 | case 0: | |
624 | /* success */ | |
625 | break; | |
626 | case -ECONNRESET: | |
627 | case -ENOENT: | |
628 | case -ESHUTDOWN: | |
629 | nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with" | |
630 | " status: %d", urb->status); | |
631 | break; | |
632 | default: | |
633 | nfc_dev_dbg(&dev->interface->dev, "Nonzero urb status received:" | |
634 | " %d", urb->status); | |
635 | } | |
636 | } | |
637 | ||
638 | struct pn533_target_type_a { | |
639 | __be16 sens_res; | |
640 | u8 sel_res; | |
641 | u8 nfcid_len; | |
642 | u8 nfcid_data[]; | |
643 | } __packed; | |
644 | ||
645 | ||
646 | #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6)) | |
647 | #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0)) | |
648 | #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8)) | |
649 | ||
650 | #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00 | |
651 | #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C | |
652 | ||
653 | #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5) | |
654 | #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2) | |
655 | ||
656 | #define PN533_TYPE_A_SEL_PROT_MIFARE 0 | |
657 | #define PN533_TYPE_A_SEL_PROT_ISO14443 1 | |
658 | #define PN533_TYPE_A_SEL_PROT_DEP 2 | |
659 | #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3 | |
660 | ||
661 | static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a, | |
662 | int target_data_len) | |
663 | { | |
664 | u8 ssd; | |
665 | u8 platconf; | |
666 | ||
667 | if (target_data_len < sizeof(struct pn533_target_type_a)) | |
668 | return false; | |
669 | ||
670 | /* The lenght check of nfcid[] and ats[] are not being performed because | |
671 | the values are not being used */ | |
672 | ||
673 | /* Requirement 4.6.3.3 from NFC Forum Digital Spec */ | |
674 | ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res); | |
675 | platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res); | |
676 | ||
677 | if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL && | |
678 | platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) || | |
679 | (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL && | |
680 | platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL)) | |
681 | return false; | |
682 | ||
683 | /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */ | |
684 | if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0) | |
685 | return false; | |
686 | ||
687 | return true; | |
688 | } | |
689 | ||
690 | static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data, | |
691 | int tgt_data_len) | |
692 | { | |
693 | struct pn533_target_type_a *tgt_type_a; | |
694 | ||
695 | tgt_type_a = (struct pn533_target_type_a *) tgt_data; | |
696 | ||
697 | if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len)) | |
698 | return -EPROTO; | |
699 | ||
700 | switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) { | |
701 | case PN533_TYPE_A_SEL_PROT_MIFARE: | |
702 | nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK; | |
703 | break; | |
704 | case PN533_TYPE_A_SEL_PROT_ISO14443: | |
705 | nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK; | |
706 | break; | |
707 | case PN533_TYPE_A_SEL_PROT_DEP: | |
708 | nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK; | |
709 | break; | |
710 | case PN533_TYPE_A_SEL_PROT_ISO14443_DEP: | |
711 | nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK | | |
712 | NFC_PROTO_NFC_DEP_MASK; | |
713 | break; | |
714 | } | |
715 | ||
716 | nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res); | |
717 | nfc_tgt->sel_res = tgt_type_a->sel_res; | |
718 | ||
719 | return 0; | |
720 | } | |
721 | ||
722 | struct pn533_target_felica { | |
723 | u8 pol_res; | |
724 | u8 opcode; | |
725 | u8 nfcid2[8]; | |
726 | u8 pad[8]; | |
727 | /* optional */ | |
728 | u8 syst_code[]; | |
729 | } __packed; | |
730 | ||
731 | #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01 | |
732 | #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE | |
733 | ||
734 | static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica, | |
735 | int target_data_len) | |
736 | { | |
737 | if (target_data_len < sizeof(struct pn533_target_felica)) | |
738 | return false; | |
739 | ||
740 | if (felica->opcode != PN533_FELICA_OPC_SENSF_RES) | |
741 | return false; | |
742 | ||
743 | return true; | |
744 | } | |
745 | ||
746 | static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data, | |
747 | int tgt_data_len) | |
748 | { | |
749 | struct pn533_target_felica *tgt_felica; | |
750 | ||
751 | tgt_felica = (struct pn533_target_felica *) tgt_data; | |
752 | ||
753 | if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len)) | |
754 | return -EPROTO; | |
755 | ||
756 | if (tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1 && | |
757 | tgt_felica->nfcid2[1] == | |
758 | PN533_FELICA_SENSF_NFCID2_DEP_B2) | |
759 | nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK; | |
760 | else | |
761 | nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK; | |
762 | ||
763 | return 0; | |
764 | } | |
765 | ||
766 | struct pn533_target_jewel { | |
767 | __be16 sens_res; | |
768 | u8 jewelid[4]; | |
769 | } __packed; | |
770 | ||
771 | static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel, | |
772 | int target_data_len) | |
773 | { | |
774 | u8 ssd; | |
775 | u8 platconf; | |
776 | ||
777 | if (target_data_len < sizeof(struct pn533_target_jewel)) | |
778 | return false; | |
779 | ||
780 | /* Requirement 4.6.3.3 from NFC Forum Digital Spec */ | |
781 | ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res); | |
782 | platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res); | |
783 | ||
784 | if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL && | |
785 | platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) || | |
786 | (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL && | |
787 | platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL)) | |
788 | return false; | |
789 | ||
790 | return true; | |
791 | } | |
792 | ||
793 | static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data, | |
794 | int tgt_data_len) | |
795 | { | |
796 | struct pn533_target_jewel *tgt_jewel; | |
797 | ||
798 | tgt_jewel = (struct pn533_target_jewel *) tgt_data; | |
799 | ||
800 | if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len)) | |
801 | return -EPROTO; | |
802 | ||
803 | nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK; | |
804 | nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res); | |
805 | ||
806 | return 0; | |
807 | } | |
808 | ||
809 | struct pn533_type_b_prot_info { | |
810 | u8 bitrate; | |
811 | u8 fsci_type; | |
812 | u8 fwi_adc_fo; | |
813 | } __packed; | |
814 | ||
815 | #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4) | |
816 | #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0) | |
817 | #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8 | |
818 | ||
819 | struct pn533_type_b_sens_res { | |
820 | u8 opcode; | |
821 | u8 nfcid[4]; | |
822 | u8 appdata[4]; | |
823 | struct pn533_type_b_prot_info prot_info; | |
824 | } __packed; | |
825 | ||
826 | #define PN533_TYPE_B_OPC_SENSB_RES 0x50 | |
827 | ||
828 | struct pn533_target_type_b { | |
829 | struct pn533_type_b_sens_res sensb_res; | |
830 | u8 attrib_res_len; | |
831 | u8 attrib_res[]; | |
832 | } __packed; | |
833 | ||
834 | static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b, | |
835 | int target_data_len) | |
836 | { | |
837 | if (target_data_len < sizeof(struct pn533_target_type_b)) | |
838 | return false; | |
839 | ||
840 | if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES) | |
841 | return false; | |
842 | ||
843 | if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) & | |
844 | PN533_TYPE_B_PROT_TYPE_RFU_MASK) | |
845 | return false; | |
846 | ||
847 | return true; | |
848 | } | |
849 | ||
850 | static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data, | |
851 | int tgt_data_len) | |
852 | { | |
853 | struct pn533_target_type_b *tgt_type_b; | |
854 | ||
855 | tgt_type_b = (struct pn533_target_type_b *) tgt_data; | |
856 | ||
857 | if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len)) | |
858 | return -EPROTO; | |
859 | ||
860 | nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK; | |
861 | ||
862 | return 0; | |
863 | } | |
864 | ||
865 | struct pn533_poll_response { | |
866 | u8 nbtg; | |
867 | u8 tg; | |
868 | u8 target_data[]; | |
869 | } __packed; | |
870 | ||
871 | static int pn533_target_found(struct pn533 *dev, | |
872 | struct pn533_poll_response *resp, int resp_len) | |
873 | { | |
874 | int target_data_len; | |
875 | struct nfc_target nfc_tgt; | |
876 | int rc; | |
877 | ||
878 | nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__, | |
879 | dev->poll_mod_curr); | |
880 | ||
881 | if (resp->tg != 1) | |
882 | return -EPROTO; | |
883 | ||
884 | target_data_len = resp_len - sizeof(struct pn533_poll_response); | |
885 | ||
886 | switch (dev->poll_mod_curr) { | |
887 | case PN533_POLL_MOD_106KBPS_A: | |
888 | rc = pn533_target_found_type_a(&nfc_tgt, resp->target_data, | |
889 | target_data_len); | |
890 | break; | |
891 | case PN533_POLL_MOD_212KBPS_FELICA: | |
892 | case PN533_POLL_MOD_424KBPS_FELICA: | |
893 | rc = pn533_target_found_felica(&nfc_tgt, resp->target_data, | |
894 | target_data_len); | |
895 | break; | |
896 | case PN533_POLL_MOD_106KBPS_JEWEL: | |
897 | rc = pn533_target_found_jewel(&nfc_tgt, resp->target_data, | |
898 | target_data_len); | |
899 | break; | |
900 | case PN533_POLL_MOD_847KBPS_B: | |
901 | rc = pn533_target_found_type_b(&nfc_tgt, resp->target_data, | |
902 | target_data_len); | |
903 | break; | |
904 | default: | |
905 | nfc_dev_err(&dev->interface->dev, "Unknown current poll" | |
906 | " modulation"); | |
907 | return -EPROTO; | |
908 | } | |
909 | ||
910 | if (rc) | |
911 | return rc; | |
912 | ||
913 | if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) { | |
914 | nfc_dev_dbg(&dev->interface->dev, "The target found does not" | |
915 | " have the desired protocol"); | |
916 | return -EAGAIN; | |
917 | } | |
918 | ||
919 | nfc_dev_dbg(&dev->interface->dev, "Target found - supported protocols: " | |
920 | "0x%x", nfc_tgt.supported_protocols); | |
921 | ||
922 | dev->tgt_available_prots = nfc_tgt.supported_protocols; | |
923 | ||
924 | nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1); | |
925 | ||
926 | return 0; | |
927 | } | |
928 | ||
929 | static void pn533_poll_reset_mod_list(struct pn533 *dev) | |
930 | { | |
931 | dev->poll_mod_count = 0; | |
932 | } | |
933 | ||
934 | static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index) | |
935 | { | |
936 | dev->poll_mod_active[dev->poll_mod_count] = | |
937 | (struct pn533_poll_modulations *) &poll_mod[mod_index]; | |
938 | dev->poll_mod_count++; | |
939 | } | |
940 | ||
941 | static void pn533_poll_create_mod_list(struct pn533 *dev, u32 protocols) | |
942 | { | |
943 | pn533_poll_reset_mod_list(dev); | |
944 | ||
945 | if (protocols & NFC_PROTO_MIFARE_MASK | |
946 | || protocols & NFC_PROTO_ISO14443_MASK | |
947 | || protocols & NFC_PROTO_NFC_DEP_MASK) | |
948 | pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A); | |
949 | ||
950 | if (protocols & NFC_PROTO_FELICA_MASK | |
951 | || protocols & NFC_PROTO_NFC_DEP_MASK) { | |
952 | pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA); | |
953 | pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA); | |
954 | } | |
955 | ||
956 | if (protocols & NFC_PROTO_JEWEL_MASK) | |
957 | pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL); | |
958 | ||
959 | if (protocols & NFC_PROTO_ISO14443_MASK) | |
960 | pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B); | |
961 | } | |
962 | ||
963 | static void pn533_start_poll_frame(struct pn533_frame *frame, | |
964 | struct pn533_poll_modulations *mod) | |
965 | { | |
966 | ||
967 | pn533_tx_frame_init(frame, PN533_CMD_IN_LIST_PASSIVE_TARGET); | |
968 | ||
969 | memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), &mod->data, mod->len); | |
970 | frame->datalen += mod->len; | |
971 | ||
972 | pn533_tx_frame_finish(frame); | |
973 | } | |
974 | ||
975 | static int pn533_start_poll_complete(struct pn533 *dev, void *arg, | |
976 | u8 *params, int params_len) | |
977 | { | |
978 | struct pn533_poll_response *resp; | |
979 | struct pn533_poll_modulations *next_mod; | |
980 | int rc; | |
981 | ||
982 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
983 | ||
984 | if (params_len == -ENOENT) { | |
985 | nfc_dev_dbg(&dev->interface->dev, "Polling operation has been" | |
986 | " stopped"); | |
987 | goto stop_poll; | |
988 | } | |
989 | ||
990 | if (params_len < 0) { | |
991 | nfc_dev_err(&dev->interface->dev, "Error %d when running poll", | |
992 | params_len); | |
993 | goto stop_poll; | |
994 | } | |
995 | ||
996 | resp = (struct pn533_poll_response *) params; | |
997 | if (resp->nbtg) { | |
998 | rc = pn533_target_found(dev, resp, params_len); | |
999 | ||
1000 | /* We must stop the poll after a valid target found */ | |
1001 | if (rc == 0) | |
1002 | goto stop_poll; | |
1003 | ||
1004 | if (rc != -EAGAIN) | |
1005 | nfc_dev_err(&dev->interface->dev, "The target found is" | |
1006 | " not valid - continuing to poll"); | |
1007 | } | |
1008 | ||
1009 | dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count; | |
1010 | ||
1011 | next_mod = dev->poll_mod_active[dev->poll_mod_curr]; | |
1012 | ||
1013 | nfc_dev_dbg(&dev->interface->dev, "Polling next modulation (0x%x)", | |
1014 | dev->poll_mod_curr); | |
1015 | ||
1016 | pn533_start_poll_frame(dev->out_frame, next_mod); | |
1017 | ||
1018 | /* Don't need to down the semaphore again */ | |
1019 | rc = __pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame, | |
1020 | dev->in_maxlen, pn533_start_poll_complete, | |
1021 | NULL, GFP_ATOMIC); | |
1022 | ||
1023 | if (rc == -EPERM) { | |
1024 | nfc_dev_dbg(&dev->interface->dev, "Cannot poll next modulation" | |
1025 | " because poll has been stopped"); | |
1026 | goto stop_poll; | |
1027 | } | |
1028 | ||
1029 | if (rc) { | |
1030 | nfc_dev_err(&dev->interface->dev, "Error %d when trying to poll" | |
1031 | " next modulation", rc); | |
1032 | goto stop_poll; | |
1033 | } | |
1034 | ||
1035 | /* Inform caller function to do not up the semaphore */ | |
1036 | return -EINPROGRESS; | |
1037 | ||
1038 | stop_poll: | |
1039 | pn533_poll_reset_mod_list(dev); | |
1040 | dev->poll_protocols = 0; | |
1041 | return 0; | |
1042 | } | |
1043 | ||
1044 | static int pn533_start_poll(struct nfc_dev *nfc_dev, u32 protocols) | |
1045 | { | |
1046 | struct pn533 *dev = nfc_get_drvdata(nfc_dev); | |
1047 | struct pn533_poll_modulations *start_mod; | |
1048 | int rc; | |
1049 | ||
1050 | nfc_dev_dbg(&dev->interface->dev, "%s - protocols=0x%x", __func__, | |
1051 | protocols); | |
1052 | ||
1053 | if (dev->poll_mod_count) { | |
1054 | nfc_dev_err(&dev->interface->dev, "Polling operation already" | |
1055 | " active"); | |
1056 | return -EBUSY; | |
1057 | } | |
1058 | ||
1059 | if (dev->tgt_active_prot) { | |
1060 | nfc_dev_err(&dev->interface->dev, "Cannot poll with a target" | |
1061 | " already activated"); | |
1062 | return -EBUSY; | |
1063 | } | |
1064 | ||
1065 | pn533_poll_create_mod_list(dev, protocols); | |
1066 | ||
1067 | if (!dev->poll_mod_count) { | |
1068 | nfc_dev_err(&dev->interface->dev, "No valid protocols" | |
1069 | " specified"); | |
1070 | rc = -EINVAL; | |
1071 | goto error; | |
1072 | } | |
1073 | ||
1074 | nfc_dev_dbg(&dev->interface->dev, "It will poll %d modulations types", | |
1075 | dev->poll_mod_count); | |
1076 | ||
1077 | dev->poll_mod_curr = 0; | |
1078 | start_mod = dev->poll_mod_active[dev->poll_mod_curr]; | |
1079 | ||
1080 | pn533_start_poll_frame(dev->out_frame, start_mod); | |
1081 | ||
1082 | rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame, | |
1083 | dev->in_maxlen, pn533_start_poll_complete, | |
1084 | NULL, GFP_KERNEL); | |
1085 | ||
1086 | if (rc) { | |
1087 | nfc_dev_err(&dev->interface->dev, "Error %d when trying to" | |
1088 | " start poll", rc); | |
1089 | goto error; | |
1090 | } | |
1091 | ||
1092 | dev->poll_protocols = protocols; | |
1093 | ||
1094 | return 0; | |
1095 | ||
1096 | error: | |
1097 | pn533_poll_reset_mod_list(dev); | |
1098 | return rc; | |
1099 | } | |
1100 | ||
1101 | static void pn533_stop_poll(struct nfc_dev *nfc_dev) | |
1102 | { | |
1103 | struct pn533 *dev = nfc_get_drvdata(nfc_dev); | |
1104 | ||
1105 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
1106 | ||
1107 | if (!dev->poll_mod_count) { | |
1108 | nfc_dev_dbg(&dev->interface->dev, "Polling operation was not" | |
1109 | " running"); | |
1110 | return; | |
1111 | } | |
1112 | ||
1113 | /* An ack will cancel the last issued command (poll) */ | |
1114 | pn533_send_ack(dev, GFP_KERNEL); | |
1115 | ||
1116 | /* prevent pn533_start_poll_complete to issue a new poll meanwhile */ | |
1117 | usb_kill_urb(dev->in_urb); | |
1118 | } | |
1119 | ||
1120 | static int pn533_activate_target_nfcdep(struct pn533 *dev) | |
1121 | { | |
1122 | struct pn533_cmd_activate_param param; | |
1123 | struct pn533_cmd_activate_response *resp; | |
1124 | int rc; | |
1125 | ||
1126 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
1127 | ||
1128 | pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_ATR); | |
1129 | ||
1130 | param.tg = 1; | |
1131 | param.next = 0; | |
1132 | memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), ¶m, | |
1133 | sizeof(struct pn533_cmd_activate_param)); | |
1134 | dev->out_frame->datalen += sizeof(struct pn533_cmd_activate_param); | |
1135 | ||
1136 | pn533_tx_frame_finish(dev->out_frame); | |
1137 | ||
1138 | rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame, | |
1139 | dev->in_maxlen); | |
1140 | if (rc) | |
1141 | return rc; | |
1142 | ||
1143 | resp = (struct pn533_cmd_activate_response *) | |
1144 | PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame); | |
1145 | rc = resp->status & PN533_CMD_RET_MASK; | |
1146 | if (rc != PN533_CMD_RET_SUCCESS) | |
1147 | return -EIO; | |
1148 | ||
1149 | return 0; | |
1150 | } | |
1151 | ||
1152 | static int pn533_activate_target(struct nfc_dev *nfc_dev, u32 target_idx, | |
1153 | u32 protocol) | |
1154 | { | |
1155 | struct pn533 *dev = nfc_get_drvdata(nfc_dev); | |
1156 | int rc; | |
1157 | ||
1158 | nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__, | |
1159 | protocol); | |
1160 | ||
1161 | if (dev->poll_mod_count) { | |
1162 | nfc_dev_err(&dev->interface->dev, "Cannot activate while" | |
1163 | " polling"); | |
1164 | return -EBUSY; | |
1165 | } | |
1166 | ||
1167 | if (dev->tgt_active_prot) { | |
1168 | nfc_dev_err(&dev->interface->dev, "There is already an active" | |
1169 | " target"); | |
1170 | return -EBUSY; | |
1171 | } | |
1172 | ||
1173 | if (!dev->tgt_available_prots) { | |
1174 | nfc_dev_err(&dev->interface->dev, "There is no available target" | |
1175 | " to activate"); | |
1176 | return -EINVAL; | |
1177 | } | |
1178 | ||
1179 | if (!(dev->tgt_available_prots & (1 << protocol))) { | |
1180 | nfc_dev_err(&dev->interface->dev, "The target does not support" | |
1181 | " the requested protocol %u", protocol); | |
1182 | return -EINVAL; | |
1183 | } | |
1184 | ||
1185 | if (protocol == NFC_PROTO_NFC_DEP) { | |
1186 | rc = pn533_activate_target_nfcdep(dev); | |
1187 | if (rc) { | |
1188 | nfc_dev_err(&dev->interface->dev, "Error %d when" | |
1189 | " activating target with" | |
1190 | " NFC_DEP protocol", rc); | |
1191 | return rc; | |
1192 | } | |
1193 | } | |
1194 | ||
1195 | dev->tgt_active_prot = protocol; | |
1196 | dev->tgt_available_prots = 0; | |
1197 | ||
1198 | return 0; | |
1199 | } | |
1200 | ||
1201 | static void pn533_deactivate_target(struct nfc_dev *nfc_dev, u32 target_idx) | |
1202 | { | |
1203 | struct pn533 *dev = nfc_get_drvdata(nfc_dev); | |
1204 | u8 tg; | |
1205 | u8 status; | |
1206 | int rc; | |
1207 | ||
1208 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
1209 | ||
1210 | if (!dev->tgt_active_prot) { | |
1211 | nfc_dev_err(&dev->interface->dev, "There is no active target"); | |
1212 | return; | |
1213 | } | |
1214 | ||
1215 | dev->tgt_active_prot = 0; | |
1216 | ||
1217 | pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_RELEASE); | |
1218 | ||
1219 | tg = 1; | |
1220 | memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &tg, sizeof(u8)); | |
1221 | dev->out_frame->datalen += sizeof(u8); | |
1222 | ||
1223 | pn533_tx_frame_finish(dev->out_frame); | |
1224 | ||
1225 | rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame, | |
1226 | dev->in_maxlen); | |
1227 | if (rc) { | |
1228 | nfc_dev_err(&dev->interface->dev, "Error when sending release" | |
1229 | " command to the controller"); | |
1230 | return; | |
1231 | } | |
1232 | ||
1233 | status = PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame)[0]; | |
1234 | rc = status & PN533_CMD_RET_MASK; | |
1235 | if (rc != PN533_CMD_RET_SUCCESS) | |
1236 | nfc_dev_err(&dev->interface->dev, "Error 0x%x when releasing" | |
1237 | " the target", rc); | |
1238 | ||
1239 | return; | |
1240 | } | |
1241 | ||
1242 | #define PN533_CMD_DATAEXCH_HEAD_LEN (sizeof(struct pn533_frame) + 3) | |
1243 | #define PN533_CMD_DATAEXCH_DATA_MAXLEN 262 | |
1244 | ||
1245 | static int pn533_data_exchange_tx_frame(struct pn533 *dev, struct sk_buff *skb) | |
1246 | { | |
1247 | int payload_len = skb->len; | |
1248 | struct pn533_frame *out_frame; | |
1249 | struct sk_buff *discarded; | |
1250 | u8 tg; | |
1251 | ||
1252 | nfc_dev_dbg(&dev->interface->dev, "%s - Sending %d bytes", __func__, | |
1253 | payload_len); | |
1254 | ||
1255 | if (payload_len > PN533_CMD_DATAEXCH_DATA_MAXLEN) { | |
1256 | /* TODO: Implement support to multi-part data exchange */ | |
1257 | nfc_dev_err(&dev->interface->dev, "Data length greater than the" | |
1258 | " max allowed: %d", | |
1259 | PN533_CMD_DATAEXCH_DATA_MAXLEN); | |
1260 | return -ENOSYS; | |
1261 | } | |
1262 | ||
1263 | /* Reserving header space */ | |
1264 | if (skb_cow_head(skb, PN533_CMD_DATAEXCH_HEAD_LEN)) { | |
1265 | nfc_dev_err(&dev->interface->dev, "Error to add header data"); | |
1266 | return -ENOMEM; | |
1267 | } | |
1268 | ||
1269 | /* Reserving tail space, see pn533_tx_frame_finish */ | |
1270 | if (skb_cow_data(skb, PN533_FRAME_TAIL_SIZE, &discarded) < 0) { | |
1271 | nfc_dev_err(&dev->interface->dev, "Error to add tail data"); | |
1272 | return -ENOMEM; | |
1273 | } | |
1274 | ||
1275 | skb_push(skb, PN533_CMD_DATAEXCH_HEAD_LEN); | |
1276 | out_frame = (struct pn533_frame *) skb->data; | |
1277 | ||
1278 | pn533_tx_frame_init(out_frame, PN533_CMD_IN_DATA_EXCHANGE); | |
1279 | ||
1280 | tg = 1; | |
1281 | memcpy(PN533_FRAME_CMD_PARAMS_PTR(out_frame), &tg, sizeof(u8)); | |
1282 | out_frame->datalen += sizeof(u8); | |
1283 | ||
1284 | /* The data is already in the out_frame, just update the datalen */ | |
1285 | out_frame->datalen += payload_len; | |
1286 | ||
1287 | pn533_tx_frame_finish(out_frame); | |
1288 | skb_put(skb, PN533_FRAME_TAIL_SIZE); | |
1289 | ||
1290 | return 0; | |
1291 | } | |
1292 | ||
1293 | struct pn533_data_exchange_arg { | |
1294 | struct sk_buff *skb_resp; | |
1295 | struct sk_buff *skb_out; | |
1296 | data_exchange_cb_t cb; | |
1297 | void *cb_context; | |
1298 | }; | |
1299 | ||
1300 | static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg, | |
1301 | u8 *params, int params_len) | |
1302 | { | |
1303 | struct pn533_data_exchange_arg *arg = _arg; | |
1304 | struct sk_buff *skb_resp = arg->skb_resp; | |
1305 | struct pn533_frame *in_frame = (struct pn533_frame *) skb_resp->data; | |
1306 | int err = 0; | |
1307 | u8 status; | |
1308 | u8 cmd_ret; | |
1309 | ||
1310 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
1311 | ||
1312 | dev_kfree_skb_irq(arg->skb_out); | |
1313 | ||
1314 | if (params_len < 0) { /* error */ | |
1315 | err = params_len; | |
1316 | goto error; | |
1317 | } | |
1318 | ||
1319 | skb_put(skb_resp, PN533_FRAME_SIZE(in_frame)); | |
1320 | ||
1321 | status = params[0]; | |
1322 | ||
1323 | cmd_ret = status & PN533_CMD_RET_MASK; | |
1324 | if (cmd_ret != PN533_CMD_RET_SUCCESS) { | |
1325 | nfc_dev_err(&dev->interface->dev, "PN533 reported error %d when" | |
1326 | " exchanging data", cmd_ret); | |
1327 | err = -EIO; | |
1328 | goto error; | |
1329 | } | |
1330 | ||
1331 | if (status & PN533_CMD_MI_MASK) { | |
1332 | /* TODO: Implement support to multi-part data exchange */ | |
1333 | nfc_dev_err(&dev->interface->dev, "Multi-part message not yet" | |
1334 | " supported"); | |
1335 | /* Prevent the other messages from controller */ | |
1336 | pn533_send_ack(dev, GFP_ATOMIC); | |
1337 | err = -ENOSYS; | |
1338 | goto error; | |
1339 | } | |
1340 | ||
1341 | skb_pull(skb_resp, PN533_CMD_DATAEXCH_HEAD_LEN); | |
1342 | skb_trim(skb_resp, skb_resp->len - PN533_FRAME_TAIL_SIZE); | |
1343 | ||
1344 | arg->cb(arg->cb_context, skb_resp, 0); | |
1345 | kfree(arg); | |
1346 | return 0; | |
1347 | ||
1348 | error: | |
1349 | dev_kfree_skb_irq(skb_resp); | |
1350 | arg->cb(arg->cb_context, NULL, err); | |
1351 | kfree(arg); | |
1352 | return 0; | |
1353 | } | |
1354 | ||
1355 | int pn533_data_exchange(struct nfc_dev *nfc_dev, u32 target_idx, | |
1356 | struct sk_buff *skb, | |
1357 | data_exchange_cb_t cb, | |
1358 | void *cb_context) | |
1359 | { | |
1360 | struct pn533 *dev = nfc_get_drvdata(nfc_dev); | |
1361 | struct pn533_frame *out_frame, *in_frame; | |
1362 | struct pn533_data_exchange_arg *arg; | |
1363 | struct sk_buff *skb_resp; | |
1364 | int skb_resp_len; | |
1365 | int rc; | |
1366 | ||
1367 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
1368 | ||
1369 | if (!dev->tgt_active_prot) { | |
1370 | nfc_dev_err(&dev->interface->dev, "Cannot exchange data if" | |
1371 | " there is no active target"); | |
1372 | rc = -EINVAL; | |
1373 | goto error; | |
1374 | } | |
1375 | ||
1376 | rc = pn533_data_exchange_tx_frame(dev, skb); | |
1377 | if (rc) | |
1378 | goto error; | |
1379 | ||
1380 | skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN + | |
1381 | PN533_CMD_DATAEXCH_DATA_MAXLEN + | |
1382 | PN533_FRAME_TAIL_SIZE; | |
1383 | ||
1384 | skb_resp = nfc_alloc_skb(skb_resp_len, GFP_KERNEL); | |
1385 | if (!skb_resp) { | |
1386 | rc = -ENOMEM; | |
1387 | goto error; | |
1388 | } | |
1389 | ||
1390 | in_frame = (struct pn533_frame *) skb_resp->data; | |
1391 | out_frame = (struct pn533_frame *) skb->data; | |
1392 | ||
1393 | arg = kmalloc(sizeof(struct pn533_data_exchange_arg), GFP_KERNEL); | |
1394 | if (!arg) { | |
1395 | rc = -ENOMEM; | |
1396 | goto free_skb_resp; | |
1397 | } | |
1398 | ||
1399 | arg->skb_resp = skb_resp; | |
1400 | arg->skb_out = skb; | |
1401 | arg->cb = cb; | |
1402 | arg->cb_context = cb_context; | |
1403 | ||
1404 | rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, skb_resp_len, | |
1405 | pn533_data_exchange_complete, arg, | |
1406 | GFP_KERNEL); | |
1407 | if (rc) { | |
1408 | nfc_dev_err(&dev->interface->dev, "Error %d when trying to" | |
1409 | " perform data_exchange", rc); | |
1410 | goto free_arg; | |
1411 | } | |
1412 | ||
1413 | return 0; | |
1414 | ||
1415 | free_arg: | |
1416 | kfree(arg); | |
1417 | free_skb_resp: | |
1418 | kfree_skb(skb_resp); | |
1419 | error: | |
1420 | kfree_skb(skb); | |
1421 | return rc; | |
1422 | } | |
1423 | ||
1424 | static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata, | |
1425 | u8 cfgdata_len) | |
1426 | { | |
1427 | int rc; | |
1428 | u8 *params; | |
1429 | ||
1430 | nfc_dev_dbg(&dev->interface->dev, "%s", __func__); | |
1431 | ||
1432 | pn533_tx_frame_init(dev->out_frame, PN533_CMD_RF_CONFIGURATION); | |
1433 | ||
1434 | params = PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame); | |
1435 | params[0] = cfgitem; | |
1436 | memcpy(¶ms[1], cfgdata, cfgdata_len); | |
1437 | dev->out_frame->datalen += (1 + cfgdata_len); | |
1438 | ||
1439 | pn533_tx_frame_finish(dev->out_frame); | |
1440 | ||
1441 | rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame, | |
1442 | dev->in_maxlen); | |
1443 | ||
1444 | return rc; | |
1445 | } | |
1446 | ||
1447 | struct nfc_ops pn533_nfc_ops = { | |
1448 | .start_poll = pn533_start_poll, | |
1449 | .stop_poll = pn533_stop_poll, | |
1450 | .activate_target = pn533_activate_target, | |
1451 | .deactivate_target = pn533_deactivate_target, | |
1452 | .data_exchange = pn533_data_exchange, | |
1453 | }; | |
1454 | ||
1455 | static int pn533_probe(struct usb_interface *interface, | |
1456 | const struct usb_device_id *id) | |
1457 | { | |
1458 | struct pn533_fw_version *fw_ver; | |
1459 | struct pn533 *dev; | |
1460 | struct usb_host_interface *iface_desc; | |
1461 | struct usb_endpoint_descriptor *endpoint; | |
1462 | struct pn533_config_max_retries max_retries; | |
1463 | int in_endpoint = 0; | |
1464 | int out_endpoint = 0; | |
1465 | int rc = -ENOMEM; | |
1466 | int i; | |
1467 | u32 protocols; | |
1468 | ||
1469 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); | |
1470 | if (!dev) | |
1471 | return -ENOMEM; | |
1472 | ||
1473 | dev->udev = usb_get_dev(interface_to_usbdev(interface)); | |
1474 | dev->interface = interface; | |
1475 | sema_init(&dev->cmd_lock, 1); | |
1476 | ||
1477 | iface_desc = interface->cur_altsetting; | |
1478 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
1479 | endpoint = &iface_desc->endpoint[i].desc; | |
1480 | ||
1481 | if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint)) { | |
1482 | dev->in_maxlen = le16_to_cpu(endpoint->wMaxPacketSize); | |
1483 | in_endpoint = endpoint->bEndpointAddress; | |
1484 | } | |
1485 | ||
1486 | if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint)) { | |
1487 | dev->out_maxlen = | |
1488 | le16_to_cpu(endpoint->wMaxPacketSize); | |
1489 | out_endpoint = endpoint->bEndpointAddress; | |
1490 | } | |
1491 | } | |
1492 | ||
1493 | if (!in_endpoint || !out_endpoint) { | |
1494 | nfc_dev_err(&interface->dev, "Could not find bulk-in or" | |
1495 | " bulk-out endpoint"); | |
1496 | rc = -ENODEV; | |
1497 | goto error; | |
1498 | } | |
1499 | ||
1500 | dev->in_frame = kmalloc(dev->in_maxlen, GFP_KERNEL); | |
1501 | dev->in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
1502 | dev->out_frame = kmalloc(dev->out_maxlen, GFP_KERNEL); | |
1503 | dev->out_urb = usb_alloc_urb(0, GFP_KERNEL); | |
1504 | ||
1505 | if (!dev->in_frame || !dev->out_frame || | |
1506 | !dev->in_urb || !dev->out_urb) | |
1507 | goto error; | |
1508 | ||
1509 | usb_fill_bulk_urb(dev->in_urb, dev->udev, | |
1510 | usb_rcvbulkpipe(dev->udev, in_endpoint), | |
1511 | NULL, 0, NULL, dev); | |
1512 | usb_fill_bulk_urb(dev->out_urb, dev->udev, | |
1513 | usb_sndbulkpipe(dev->udev, out_endpoint), | |
1514 | NULL, 0, | |
1515 | pn533_send_complete, dev); | |
1516 | ||
1517 | tasklet_init(&dev->tasklet, pn533_tasklet_cmd_complete, (ulong)dev); | |
1518 | ||
1519 | usb_set_intfdata(interface, dev); | |
1520 | ||
1521 | pn533_tx_frame_init(dev->out_frame, PN533_CMD_GET_FIRMWARE_VERSION); | |
1522 | pn533_tx_frame_finish(dev->out_frame); | |
1523 | ||
1524 | rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame, | |
1525 | dev->in_maxlen); | |
1526 | if (rc) | |
1527 | goto kill_tasklet; | |
1528 | ||
1529 | fw_ver = (struct pn533_fw_version *) | |
1530 | PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame); | |
1531 | nfc_dev_info(&dev->interface->dev, "NXP PN533 firmware ver %d.%d now" | |
1532 | " attached", fw_ver->ver, fw_ver->rev); | |
1533 | ||
1534 | protocols = NFC_PROTO_JEWEL_MASK | |
1535 | | NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK | |
1536 | | NFC_PROTO_ISO14443_MASK | |
1537 | | NFC_PROTO_NFC_DEP_MASK; | |
1538 | ||
1539 | dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols); | |
1540 | if (!dev->nfc_dev) | |
1541 | goto kill_tasklet; | |
1542 | ||
1543 | nfc_set_parent_dev(dev->nfc_dev, &interface->dev); | |
1544 | nfc_set_drvdata(dev->nfc_dev, dev); | |
1545 | ||
1546 | rc = nfc_register_device(dev->nfc_dev); | |
1547 | if (rc) | |
1548 | goto free_nfc_dev; | |
1549 | ||
1550 | max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS; | |
1551 | max_retries.mx_rty_psl = 2; | |
1552 | max_retries.mx_rty_passive_act = PN533_CONFIG_MAX_RETRIES_NO_RETRY; | |
1553 | ||
1554 | rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES, | |
1555 | (u8 *) &max_retries, sizeof(max_retries)); | |
1556 | ||
1557 | if (rc) { | |
1558 | nfc_dev_err(&dev->interface->dev, "Error on setting MAX_RETRIES" | |
1559 | " config"); | |
1560 | goto free_nfc_dev; | |
1561 | } | |
1562 | ||
1563 | return 0; | |
1564 | ||
1565 | free_nfc_dev: | |
1566 | nfc_free_device(dev->nfc_dev); | |
1567 | kill_tasklet: | |
1568 | tasklet_kill(&dev->tasklet); | |
1569 | error: | |
1570 | kfree(dev->in_frame); | |
1571 | usb_free_urb(dev->in_urb); | |
1572 | kfree(dev->out_frame); | |
1573 | usb_free_urb(dev->out_urb); | |
1574 | kfree(dev); | |
1575 | return rc; | |
1576 | } | |
1577 | ||
1578 | static void pn533_disconnect(struct usb_interface *interface) | |
1579 | { | |
1580 | struct pn533 *dev; | |
1581 | ||
1582 | dev = usb_get_intfdata(interface); | |
1583 | usb_set_intfdata(interface, NULL); | |
1584 | ||
1585 | nfc_unregister_device(dev->nfc_dev); | |
1586 | nfc_free_device(dev->nfc_dev); | |
1587 | ||
1588 | usb_kill_urb(dev->in_urb); | |
1589 | usb_kill_urb(dev->out_urb); | |
1590 | ||
1591 | tasklet_kill(&dev->tasklet); | |
1592 | ||
1593 | kfree(dev->in_frame); | |
1594 | usb_free_urb(dev->in_urb); | |
1595 | kfree(dev->out_frame); | |
1596 | usb_free_urb(dev->out_urb); | |
1597 | kfree(dev); | |
1598 | ||
276556db | 1599 | nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected"); |
c46ee386 AAJ |
1600 | } |
1601 | ||
1602 | static struct usb_driver pn533_driver = { | |
1603 | .name = "pn533", | |
1604 | .probe = pn533_probe, | |
1605 | .disconnect = pn533_disconnect, | |
1606 | .id_table = pn533_table, | |
1607 | }; | |
1608 | ||
1609 | static int __init pn533_init(void) | |
1610 | { | |
1611 | int rc; | |
1612 | ||
1613 | rc = usb_register(&pn533_driver); | |
1614 | if (rc) | |
1615 | err("usb_register failed. Error number %d", rc); | |
1616 | ||
1617 | return rc; | |
1618 | } | |
1619 | ||
1620 | static void __exit pn533_exit(void) | |
1621 | { | |
1622 | usb_deregister(&pn533_driver); | |
1623 | } | |
1624 | ||
1625 | module_init(pn533_init); | |
1626 | module_exit(pn533_exit); | |
1627 | ||
1628 | MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>," | |
1629 | " Aloisio Almeida Jr <aloisio.almeida@openbossa.org>"); | |
1630 | MODULE_DESCRIPTION("PN533 usb driver ver " VERSION); | |
1631 | MODULE_VERSION(VERSION); | |
1632 | MODULE_LICENSE("GPL"); |