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Commit | Line | Data |
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59ee2361 TE |
1 | /* |
2 | * NFC Digital Protocol stack | |
3 | * Copyright (c) 2013, Intel Corporation. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | */ | |
15 | ||
c5da0e4a SO |
16 | #define pr_fmt(fmt) "digital: %s: " fmt, __func__ |
17 | ||
59ee2361 TE |
18 | #include "digital.h" |
19 | ||
20 | #define DIGITAL_CMD_SENS_REQ 0x26 | |
21 | #define DIGITAL_CMD_ALL_REQ 0x52 | |
22 | #define DIGITAL_CMD_SEL_REQ_CL1 0x93 | |
23 | #define DIGITAL_CMD_SEL_REQ_CL2 0x95 | |
24 | #define DIGITAL_CMD_SEL_REQ_CL3 0x97 | |
25 | ||
26 | #define DIGITAL_SDD_REQ_SEL_PAR 0x20 | |
27 | ||
28 | #define DIGITAL_SDD_RES_CT 0x88 | |
29 | #define DIGITAL_SDD_RES_LEN 5 | |
30 | ||
2c66daec TE |
31 | #define DIGITAL_SEL_RES_NFCID1_COMPLETE(sel_res) (!((sel_res) & 0x04)) |
32 | #define DIGITAL_SEL_RES_IS_T2T(sel_res) (!((sel_res) & 0x60)) | |
7d0911c0 | 33 | #define DIGITAL_SEL_RES_IS_NFC_DEP(sel_res) ((sel_res) & 0x40) |
2c66daec TE |
34 | |
35 | #define DIGITAL_SENS_RES_IS_T1T(sens_res) (((sens_res) & 0x000C) == 0x000C) | |
36 | #define DIGITAL_SENS_RES_IS_VALID(sens_res) \ | |
37 | ((!((sens_res) & 0x1F00) && (((sens_res) & 0x000C) == 0x000C)) || \ | |
38 | (((sens_res) & 0x1F00) && ((sens_res) & 0x000C) != 0x000C)) | |
39 | ||
40 | #define DIGITAL_MIFARE_READ_RES_LEN 16 | |
41 | #define DIGITAL_MIFARE_ACK_RES 0x0A | |
42 | ||
8c0695e4 TE |
43 | #define DIGITAL_CMD_SENSF_REQ 0x00 |
44 | #define DIGITAL_CMD_SENSF_RES 0x01 | |
45 | ||
46 | #define DIGITAL_SENSF_RES_MIN_LENGTH 17 | |
47 | #define DIGITAL_SENSF_RES_RD_AP_B1 0x00 | |
48 | #define DIGITAL_SENSF_RES_RD_AP_B2 0x8F | |
49 | ||
50 | #define DIGITAL_SENSF_REQ_RC_NONE 0 | |
51 | #define DIGITAL_SENSF_REQ_RC_SC 1 | |
52 | #define DIGITAL_SENSF_REQ_RC_AP 2 | |
53 | ||
2c66daec TE |
54 | struct digital_sdd_res { |
55 | u8 nfcid1[4]; | |
56 | u8 bcc; | |
57 | } __packed; | |
58 | ||
59 | struct digital_sel_req { | |
60 | u8 sel_cmd; | |
61 | u8 b2; | |
62 | u8 nfcid1[4]; | |
63 | u8 bcc; | |
64 | } __packed; | |
65 | ||
8c0695e4 TE |
66 | struct digital_sensf_req { |
67 | u8 cmd; | |
68 | u8 sc1; | |
69 | u8 sc2; | |
70 | u8 rc; | |
71 | u8 tsn; | |
72 | } __packed; | |
73 | ||
74 | struct digital_sensf_res { | |
75 | u8 cmd; | |
76 | u8 nfcid2[8]; | |
77 | u8 pad0[2]; | |
78 | u8 pad1[3]; | |
79 | u8 mrti_check; | |
80 | u8 mrti_update; | |
81 | u8 pad2; | |
82 | u8 rd[2]; | |
83 | } __packed; | |
84 | ||
2c66daec TE |
85 | static int digital_in_send_sdd_req(struct nfc_digital_dev *ddev, |
86 | struct nfc_target *target); | |
87 | ||
88 | static void digital_in_recv_sel_res(struct nfc_digital_dev *ddev, void *arg, | |
89 | struct sk_buff *resp) | |
90 | { | |
91 | struct nfc_target *target = arg; | |
92 | int rc; | |
93 | u8 sel_res; | |
94 | u8 nfc_proto; | |
95 | ||
96 | if (IS_ERR(resp)) { | |
97 | rc = PTR_ERR(resp); | |
98 | resp = NULL; | |
99 | goto exit; | |
100 | } | |
101 | ||
102 | if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) { | |
103 | rc = digital_skb_check_crc_a(resp); | |
104 | if (rc) { | |
105 | PROTOCOL_ERR("4.4.1.3"); | |
106 | goto exit; | |
107 | } | |
108 | } | |
109 | ||
110 | if (!resp->len) { | |
111 | rc = -EIO; | |
112 | goto exit; | |
113 | } | |
114 | ||
115 | sel_res = resp->data[0]; | |
116 | ||
117 | if (!DIGITAL_SEL_RES_NFCID1_COMPLETE(sel_res)) { | |
118 | rc = digital_in_send_sdd_req(ddev, target); | |
119 | if (rc) | |
120 | goto exit; | |
121 | ||
122 | goto exit_free_skb; | |
123 | } | |
124 | ||
125 | if (DIGITAL_SEL_RES_IS_T2T(sel_res)) { | |
126 | nfc_proto = NFC_PROTO_MIFARE; | |
7d0911c0 TE |
127 | } else if (DIGITAL_SEL_RES_IS_NFC_DEP(sel_res)) { |
128 | nfc_proto = NFC_PROTO_NFC_DEP; | |
2c66daec TE |
129 | } else { |
130 | rc = -EOPNOTSUPP; | |
131 | goto exit; | |
132 | } | |
133 | ||
134 | target->sel_res = sel_res; | |
135 | ||
136 | rc = digital_target_found(ddev, target, nfc_proto); | |
137 | ||
138 | exit: | |
139 | kfree(target); | |
140 | ||
141 | exit_free_skb: | |
142 | dev_kfree_skb(resp); | |
143 | ||
144 | if (rc) | |
145 | digital_poll_next_tech(ddev); | |
146 | } | |
147 | ||
148 | static int digital_in_send_sel_req(struct nfc_digital_dev *ddev, | |
149 | struct nfc_target *target, | |
150 | struct digital_sdd_res *sdd_res) | |
151 | { | |
152 | struct sk_buff *skb; | |
153 | struct digital_sel_req *sel_req; | |
154 | u8 sel_cmd; | |
155 | int rc; | |
156 | ||
157 | skb = digital_skb_alloc(ddev, sizeof(struct digital_sel_req)); | |
158 | if (!skb) | |
159 | return -ENOMEM; | |
160 | ||
161 | skb_put(skb, sizeof(struct digital_sel_req)); | |
162 | sel_req = (struct digital_sel_req *)skb->data; | |
163 | ||
164 | if (target->nfcid1_len <= 4) | |
165 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL1; | |
166 | else if (target->nfcid1_len < 10) | |
167 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL2; | |
168 | else | |
169 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL3; | |
170 | ||
171 | sel_req->sel_cmd = sel_cmd; | |
172 | sel_req->b2 = 0x70; | |
173 | memcpy(sel_req->nfcid1, sdd_res->nfcid1, 4); | |
174 | sel_req->bcc = sdd_res->bcc; | |
175 | ||
176 | if (DIGITAL_DRV_CAPS_IN_CRC(ddev)) { | |
177 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, | |
178 | NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A); | |
179 | if (rc) | |
180 | goto exit; | |
181 | } else { | |
182 | digital_skb_add_crc_a(skb); | |
183 | } | |
184 | ||
185 | rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sel_res, | |
186 | target); | |
187 | exit: | |
188 | if (rc) | |
189 | kfree_skb(skb); | |
190 | ||
191 | return rc; | |
192 | } | |
193 | ||
194 | static void digital_in_recv_sdd_res(struct nfc_digital_dev *ddev, void *arg, | |
195 | struct sk_buff *resp) | |
196 | { | |
197 | struct nfc_target *target = arg; | |
198 | struct digital_sdd_res *sdd_res; | |
199 | int rc; | |
200 | u8 offset, size; | |
201 | u8 i, bcc; | |
202 | ||
203 | if (IS_ERR(resp)) { | |
204 | rc = PTR_ERR(resp); | |
205 | resp = NULL; | |
206 | goto exit; | |
207 | } | |
208 | ||
209 | if (resp->len < DIGITAL_SDD_RES_LEN) { | |
210 | PROTOCOL_ERR("4.7.2.8"); | |
211 | rc = -EINVAL; | |
212 | goto exit; | |
213 | } | |
214 | ||
215 | sdd_res = (struct digital_sdd_res *)resp->data; | |
216 | ||
217 | for (i = 0, bcc = 0; i < 4; i++) | |
218 | bcc ^= sdd_res->nfcid1[i]; | |
219 | ||
220 | if (bcc != sdd_res->bcc) { | |
221 | PROTOCOL_ERR("4.7.2.6"); | |
222 | rc = -EINVAL; | |
223 | goto exit; | |
224 | } | |
225 | ||
226 | if (sdd_res->nfcid1[0] == DIGITAL_SDD_RES_CT) { | |
227 | offset = 1; | |
228 | size = 3; | |
229 | } else { | |
230 | offset = 0; | |
231 | size = 4; | |
232 | } | |
233 | ||
234 | memcpy(target->nfcid1 + target->nfcid1_len, sdd_res->nfcid1 + offset, | |
235 | size); | |
236 | target->nfcid1_len += size; | |
237 | ||
238 | rc = digital_in_send_sel_req(ddev, target, sdd_res); | |
239 | ||
240 | exit: | |
241 | dev_kfree_skb(resp); | |
242 | ||
243 | if (rc) { | |
244 | kfree(target); | |
245 | digital_poll_next_tech(ddev); | |
246 | } | |
247 | } | |
248 | ||
249 | static int digital_in_send_sdd_req(struct nfc_digital_dev *ddev, | |
250 | struct nfc_target *target) | |
251 | { | |
252 | int rc; | |
253 | struct sk_buff *skb; | |
254 | u8 sel_cmd; | |
255 | ||
256 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, | |
257 | NFC_DIGITAL_FRAMING_NFCA_STANDARD); | |
258 | if (rc) | |
259 | return rc; | |
260 | ||
261 | skb = digital_skb_alloc(ddev, 2); | |
26042530 | 262 | if (!skb) |
2c66daec | 263 | return -ENOMEM; |
2c66daec TE |
264 | |
265 | if (target->nfcid1_len == 0) | |
266 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL1; | |
267 | else if (target->nfcid1_len == 3) | |
268 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL2; | |
269 | else | |
270 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL3; | |
271 | ||
272 | *skb_put(skb, sizeof(u8)) = sel_cmd; | |
273 | *skb_put(skb, sizeof(u8)) = DIGITAL_SDD_REQ_SEL_PAR; | |
274 | ||
275 | return digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sdd_res, | |
276 | target); | |
277 | } | |
278 | ||
59ee2361 TE |
279 | static void digital_in_recv_sens_res(struct nfc_digital_dev *ddev, void *arg, |
280 | struct sk_buff *resp) | |
281 | { | |
2c66daec TE |
282 | struct nfc_target *target = NULL; |
283 | u16 sens_res; | |
284 | int rc; | |
285 | ||
286 | if (IS_ERR(resp)) { | |
287 | rc = PTR_ERR(resp); | |
288 | resp = NULL; | |
289 | goto exit; | |
290 | } | |
291 | ||
292 | if (resp->len < sizeof(u16)) { | |
293 | rc = -EIO; | |
294 | goto exit; | |
295 | } | |
296 | ||
297 | target = kzalloc(sizeof(struct nfc_target), GFP_KERNEL); | |
298 | if (!target) { | |
299 | rc = -ENOMEM; | |
300 | goto exit; | |
301 | } | |
302 | ||
303 | memcpy(&target->sens_res, resp->data, sizeof(u16)); | |
59ee2361 | 304 | |
2c66daec TE |
305 | sens_res = be16_to_cpu(target->sens_res); |
306 | ||
307 | if (!DIGITAL_SENS_RES_IS_VALID(sens_res)) { | |
308 | PROTOCOL_ERR("4.6.3.3"); | |
309 | rc = -EINVAL; | |
310 | goto exit; | |
311 | } | |
312 | ||
313 | if (DIGITAL_SENS_RES_IS_T1T(sens_res)) | |
314 | rc = digital_target_found(ddev, target, NFC_PROTO_JEWEL); | |
315 | else | |
316 | rc = digital_in_send_sdd_req(ddev, target); | |
317 | ||
318 | exit: | |
319 | dev_kfree_skb(resp); | |
320 | ||
321 | if (rc) { | |
322 | kfree(target); | |
323 | digital_poll_next_tech(ddev); | |
324 | } | |
59ee2361 TE |
325 | } |
326 | ||
327 | int digital_in_send_sens_req(struct nfc_digital_dev *ddev, u8 rf_tech) | |
328 | { | |
329 | struct sk_buff *skb; | |
330 | int rc; | |
331 | ||
332 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, | |
333 | NFC_DIGITAL_RF_TECH_106A); | |
334 | if (rc) | |
335 | return rc; | |
336 | ||
337 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, | |
338 | NFC_DIGITAL_FRAMING_NFCA_SHORT); | |
339 | if (rc) | |
340 | return rc; | |
341 | ||
342 | skb = digital_skb_alloc(ddev, 1); | |
343 | if (!skb) | |
344 | return -ENOMEM; | |
345 | ||
346 | *skb_put(skb, sizeof(u8)) = DIGITAL_CMD_SENS_REQ; | |
347 | ||
348 | rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sens_res, NULL); | |
349 | if (rc) | |
350 | kfree_skb(skb); | |
351 | ||
352 | return rc; | |
353 | } | |
2c66daec TE |
354 | |
355 | int digital_in_recv_mifare_res(struct sk_buff *resp) | |
356 | { | |
357 | /* Successful READ command response is 16 data bytes + 2 CRC bytes long. | |
358 | * Since the driver can't differentiate a ACK/NACK response from a valid | |
359 | * READ response, the CRC calculation must be handled at digital level | |
360 | * even if the driver supports it for this technology. | |
361 | */ | |
362 | if (resp->len == DIGITAL_MIFARE_READ_RES_LEN + DIGITAL_CRC_LEN) { | |
363 | if (digital_skb_check_crc_a(resp)) { | |
364 | PROTOCOL_ERR("9.4.1.2"); | |
365 | return -EIO; | |
366 | } | |
367 | ||
368 | return 0; | |
369 | } | |
370 | ||
371 | /* ACK response (i.e. successful WRITE). */ | |
372 | if (resp->len == 1 && resp->data[0] == DIGITAL_MIFARE_ACK_RES) { | |
373 | resp->data[0] = 0; | |
374 | return 0; | |
375 | } | |
376 | ||
377 | /* NACK and any other responses are treated as error. */ | |
378 | return -EIO; | |
379 | } | |
8c0695e4 TE |
380 | |
381 | static void digital_in_recv_sensf_res(struct nfc_digital_dev *ddev, void *arg, | |
382 | struct sk_buff *resp) | |
383 | { | |
384 | int rc; | |
7d0911c0 | 385 | u8 proto; |
8c0695e4 TE |
386 | struct nfc_target target; |
387 | struct digital_sensf_res *sensf_res; | |
388 | ||
389 | if (IS_ERR(resp)) { | |
390 | rc = PTR_ERR(resp); | |
391 | resp = NULL; | |
392 | goto exit; | |
393 | } | |
394 | ||
395 | if (resp->len < DIGITAL_SENSF_RES_MIN_LENGTH) { | |
396 | rc = -EIO; | |
397 | goto exit; | |
398 | } | |
399 | ||
400 | if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) { | |
401 | rc = digital_skb_check_crc_f(resp); | |
402 | if (rc) { | |
403 | PROTOCOL_ERR("6.4.1.8"); | |
404 | goto exit; | |
405 | } | |
406 | } | |
407 | ||
408 | skb_pull(resp, 1); | |
409 | ||
410 | memset(&target, 0, sizeof(struct nfc_target)); | |
411 | ||
412 | sensf_res = (struct digital_sensf_res *)resp->data; | |
413 | ||
414 | memcpy(target.sensf_res, sensf_res, resp->len); | |
415 | target.sensf_res_len = resp->len; | |
416 | ||
417 | memcpy(target.nfcid2, sensf_res->nfcid2, NFC_NFCID2_MAXSIZE); | |
418 | target.nfcid2_len = NFC_NFCID2_MAXSIZE; | |
419 | ||
7d0911c0 TE |
420 | if (target.nfcid2[0] == DIGITAL_SENSF_NFCID2_NFC_DEP_B1 && |
421 | target.nfcid2[1] == DIGITAL_SENSF_NFCID2_NFC_DEP_B2) | |
422 | proto = NFC_PROTO_NFC_DEP; | |
423 | else | |
424 | proto = NFC_PROTO_FELICA; | |
425 | ||
426 | rc = digital_target_found(ddev, &target, proto); | |
8c0695e4 TE |
427 | |
428 | exit: | |
429 | dev_kfree_skb(resp); | |
430 | ||
431 | if (rc) | |
432 | digital_poll_next_tech(ddev); | |
433 | } | |
434 | ||
435 | int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech) | |
436 | { | |
437 | struct digital_sensf_req *sensf_req; | |
438 | struct sk_buff *skb; | |
439 | int rc; | |
440 | u8 size; | |
441 | ||
442 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech); | |
443 | if (rc) | |
444 | return rc; | |
445 | ||
446 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, | |
447 | NFC_DIGITAL_FRAMING_NFCF); | |
448 | if (rc) | |
449 | return rc; | |
450 | ||
451 | size = sizeof(struct digital_sensf_req); | |
452 | ||
453 | skb = digital_skb_alloc(ddev, size); | |
454 | if (!skb) | |
455 | return -ENOMEM; | |
456 | ||
457 | skb_put(skb, size); | |
458 | ||
459 | sensf_req = (struct digital_sensf_req *)skb->data; | |
460 | sensf_req->cmd = DIGITAL_CMD_SENSF_REQ; | |
461 | sensf_req->sc1 = 0xFF; | |
462 | sensf_req->sc2 = 0xFF; | |
463 | sensf_req->rc = 0; | |
464 | sensf_req->tsn = 0; | |
465 | ||
466 | *skb_push(skb, 1) = size + 1; | |
467 | ||
468 | if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) | |
469 | digital_skb_add_crc_f(skb); | |
470 | ||
471 | rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sensf_res, | |
472 | NULL); | |
473 | if (rc) | |
474 | kfree_skb(skb); | |
475 | ||
476 | return rc; | |
477 | } | |
1c7a4c24 TE |
478 | |
479 | static int digital_tg_send_sel_res(struct nfc_digital_dev *ddev) | |
480 | { | |
481 | struct sk_buff *skb; | |
482 | int rc; | |
483 | ||
484 | skb = digital_skb_alloc(ddev, 1); | |
485 | if (!skb) | |
486 | return -ENOMEM; | |
487 | ||
488 | *skb_put(skb, 1) = DIGITAL_SEL_RES_NFC_DEP; | |
489 | ||
490 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) | |
491 | digital_skb_add_crc_a(skb); | |
492 | ||
493 | rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_atr_req, | |
494 | NULL); | |
495 | if (rc) | |
496 | kfree_skb(skb); | |
497 | ||
498 | return rc; | |
499 | } | |
500 | ||
501 | static void digital_tg_recv_sel_req(struct nfc_digital_dev *ddev, void *arg, | |
502 | struct sk_buff *resp) | |
503 | { | |
504 | int rc; | |
505 | ||
506 | if (IS_ERR(resp)) { | |
507 | rc = PTR_ERR(resp); | |
508 | resp = NULL; | |
509 | goto exit; | |
510 | } | |
511 | ||
512 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) { | |
513 | rc = digital_skb_check_crc_a(resp); | |
514 | if (rc) { | |
515 | PROTOCOL_ERR("4.4.1.3"); | |
516 | goto exit; | |
517 | } | |
518 | } | |
519 | ||
520 | /* Silently ignore SEL_REQ content and send a SEL_RES for NFC-DEP */ | |
521 | ||
522 | rc = digital_tg_send_sel_res(ddev); | |
523 | ||
524 | exit: | |
525 | if (rc) | |
526 | digital_poll_next_tech(ddev); | |
527 | ||
528 | dev_kfree_skb(resp); | |
529 | } | |
530 | ||
531 | static int digital_tg_send_sdd_res(struct nfc_digital_dev *ddev) | |
532 | { | |
533 | struct sk_buff *skb; | |
534 | struct digital_sdd_res *sdd_res; | |
535 | int rc, i; | |
536 | ||
537 | skb = digital_skb_alloc(ddev, sizeof(struct digital_sdd_res)); | |
538 | if (!skb) | |
539 | return -ENOMEM; | |
540 | ||
541 | skb_put(skb, sizeof(struct digital_sdd_res)); | |
542 | sdd_res = (struct digital_sdd_res *)skb->data; | |
543 | ||
544 | sdd_res->nfcid1[0] = 0x08; | |
545 | get_random_bytes(sdd_res->nfcid1 + 1, 3); | |
546 | ||
547 | sdd_res->bcc = 0; | |
548 | for (i = 0; i < 4; i++) | |
549 | sdd_res->bcc ^= sdd_res->nfcid1[i]; | |
550 | ||
551 | rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_sel_req, | |
552 | NULL); | |
553 | if (rc) | |
554 | kfree_skb(skb); | |
555 | ||
556 | return rc; | |
557 | } | |
558 | ||
559 | static void digital_tg_recv_sdd_req(struct nfc_digital_dev *ddev, void *arg, | |
560 | struct sk_buff *resp) | |
561 | { | |
562 | u8 *sdd_req; | |
563 | int rc; | |
564 | ||
565 | if (IS_ERR(resp)) { | |
566 | rc = PTR_ERR(resp); | |
567 | resp = NULL; | |
568 | goto exit; | |
569 | } | |
570 | ||
571 | sdd_req = resp->data; | |
572 | ||
573 | if (resp->len < 2 || sdd_req[0] != DIGITAL_CMD_SEL_REQ_CL1 || | |
574 | sdd_req[1] != DIGITAL_SDD_REQ_SEL_PAR) { | |
575 | rc = -EINVAL; | |
576 | goto exit; | |
577 | } | |
578 | ||
579 | rc = digital_tg_send_sdd_res(ddev); | |
580 | ||
581 | exit: | |
582 | if (rc) | |
583 | digital_poll_next_tech(ddev); | |
584 | ||
585 | dev_kfree_skb(resp); | |
586 | } | |
587 | ||
588 | static int digital_tg_send_sens_res(struct nfc_digital_dev *ddev) | |
589 | { | |
590 | struct sk_buff *skb; | |
591 | u8 *sens_res; | |
592 | int rc; | |
593 | ||
594 | skb = digital_skb_alloc(ddev, 2); | |
595 | if (!skb) | |
596 | return -ENOMEM; | |
597 | ||
598 | sens_res = skb_put(skb, 2); | |
599 | ||
600 | sens_res[0] = (DIGITAL_SENS_RES_NFC_DEP >> 8) & 0xFF; | |
601 | sens_res[1] = DIGITAL_SENS_RES_NFC_DEP & 0xFF; | |
602 | ||
603 | rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_sdd_req, | |
604 | NULL); | |
605 | if (rc) | |
606 | kfree_skb(skb); | |
607 | ||
608 | return rc; | |
609 | } | |
610 | ||
611 | void digital_tg_recv_sens_req(struct nfc_digital_dev *ddev, void *arg, | |
612 | struct sk_buff *resp) | |
613 | { | |
614 | u8 sens_req; | |
615 | int rc; | |
616 | ||
617 | if (IS_ERR(resp)) { | |
618 | rc = PTR_ERR(resp); | |
619 | resp = NULL; | |
620 | goto exit; | |
621 | } | |
622 | ||
623 | sens_req = resp->data[0]; | |
624 | ||
625 | if (!resp->len || (sens_req != DIGITAL_CMD_SENS_REQ && | |
626 | sens_req != DIGITAL_CMD_ALL_REQ)) { | |
627 | rc = -EINVAL; | |
628 | goto exit; | |
629 | } | |
630 | ||
631 | rc = digital_tg_send_sens_res(ddev); | |
632 | ||
633 | exit: | |
634 | if (rc) | |
635 | digital_poll_next_tech(ddev); | |
636 | ||
637 | dev_kfree_skb(resp); | |
638 | } | |
639 | ||
180106bd | 640 | static int digital_tg_send_sensf_res(struct nfc_digital_dev *ddev, |
1c7a4c24 TE |
641 | struct digital_sensf_req *sensf_req) |
642 | { | |
643 | struct sk_buff *skb; | |
644 | u8 size; | |
645 | int rc; | |
646 | struct digital_sensf_res *sensf_res; | |
647 | ||
648 | size = sizeof(struct digital_sensf_res); | |
649 | ||
650 | if (sensf_req->rc != DIGITAL_SENSF_REQ_RC_NONE) | |
651 | size -= sizeof(sensf_res->rd); | |
652 | ||
653 | skb = digital_skb_alloc(ddev, size); | |
654 | if (!skb) | |
655 | return -ENOMEM; | |
656 | ||
657 | skb_put(skb, size); | |
658 | ||
659 | sensf_res = (struct digital_sensf_res *)skb->data; | |
660 | ||
661 | memset(sensf_res, 0, size); | |
662 | ||
663 | sensf_res->cmd = DIGITAL_CMD_SENSF_RES; | |
664 | sensf_res->nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1; | |
665 | sensf_res->nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2; | |
666 | get_random_bytes(&sensf_res->nfcid2[2], 6); | |
667 | ||
668 | switch (sensf_req->rc) { | |
669 | case DIGITAL_SENSF_REQ_RC_SC: | |
670 | sensf_res->rd[0] = sensf_req->sc1; | |
671 | sensf_res->rd[1] = sensf_req->sc2; | |
672 | break; | |
673 | case DIGITAL_SENSF_REQ_RC_AP: | |
674 | sensf_res->rd[0] = DIGITAL_SENSF_RES_RD_AP_B1; | |
675 | sensf_res->rd[1] = DIGITAL_SENSF_RES_RD_AP_B2; | |
676 | break; | |
677 | } | |
678 | ||
679 | *skb_push(skb, sizeof(u8)) = size + 1; | |
680 | ||
681 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) | |
682 | digital_skb_add_crc_f(skb); | |
683 | ||
684 | rc = digital_tg_send_cmd(ddev, skb, 300, | |
685 | digital_tg_recv_atr_req, NULL); | |
686 | if (rc) | |
687 | kfree_skb(skb); | |
688 | ||
689 | return rc; | |
690 | } | |
691 | ||
692 | void digital_tg_recv_sensf_req(struct nfc_digital_dev *ddev, void *arg, | |
693 | struct sk_buff *resp) | |
694 | { | |
695 | struct digital_sensf_req *sensf_req; | |
696 | int rc; | |
697 | ||
698 | if (IS_ERR(resp)) { | |
699 | rc = PTR_ERR(resp); | |
700 | resp = NULL; | |
701 | goto exit; | |
702 | } | |
703 | ||
704 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) { | |
705 | rc = digital_skb_check_crc_f(resp); | |
706 | if (rc) { | |
707 | PROTOCOL_ERR("6.4.1.8"); | |
708 | goto exit; | |
709 | } | |
710 | } | |
711 | ||
712 | if (resp->len != sizeof(struct digital_sensf_req) + 1) { | |
713 | rc = -EINVAL; | |
714 | goto exit; | |
715 | } | |
716 | ||
717 | skb_pull(resp, 1); | |
718 | sensf_req = (struct digital_sensf_req *)resp->data; | |
719 | ||
720 | if (sensf_req->cmd != DIGITAL_CMD_SENSF_REQ) { | |
721 | rc = -EINVAL; | |
722 | goto exit; | |
723 | } | |
724 | ||
725 | rc = digital_tg_send_sensf_res(ddev, sensf_req); | |
726 | ||
727 | exit: | |
728 | if (rc) | |
729 | digital_poll_next_tech(ddev); | |
730 | ||
731 | dev_kfree_skb(resp); | |
732 | } | |
733 | ||
734 | int digital_tg_listen_nfca(struct nfc_digital_dev *ddev, u8 rf_tech) | |
735 | { | |
736 | int rc; | |
737 | ||
738 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech); | |
739 | if (rc) | |
740 | return rc; | |
741 | ||
742 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, | |
743 | NFC_DIGITAL_FRAMING_NFCA_NFC_DEP); | |
744 | if (rc) | |
745 | return rc; | |
746 | ||
747 | return digital_tg_listen(ddev, 300, digital_tg_recv_sens_req, NULL); | |
748 | } | |
749 | ||
750 | int digital_tg_listen_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech) | |
751 | { | |
752 | int rc; | |
753 | u8 *nfcid2; | |
754 | ||
755 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech); | |
756 | if (rc) | |
757 | return rc; | |
758 | ||
759 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, | |
760 | NFC_DIGITAL_FRAMING_NFCF_NFC_DEP); | |
761 | if (rc) | |
762 | return rc; | |
763 | ||
764 | nfcid2 = kzalloc(NFC_NFCID2_MAXSIZE, GFP_KERNEL); | |
765 | if (!nfcid2) | |
766 | return -ENOMEM; | |
767 | ||
768 | nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1; | |
769 | nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2; | |
770 | get_random_bytes(nfcid2 + 2, NFC_NFCID2_MAXSIZE - 2); | |
771 | ||
772 | return digital_tg_listen(ddev, 300, digital_tg_recv_sensf_req, nfcid2); | |
773 | } |