Commit | Line | Data |
---|---|---|
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 | 34 | |
13292c9a | 35 | #define DIGITAL_SENS_RES_IS_T1T(sens_res) (((sens_res) & 0x0C00) == 0x0C00) |
2c66daec | 36 | #define DIGITAL_SENS_RES_IS_VALID(sens_res) \ |
13292c9a TE |
37 | ((!((sens_res) & 0x001F) && (((sens_res) & 0x0C00) == 0x0C00)) || \ |
38 | (((sens_res) & 0x001F) && ((sens_res) & 0x0C00) != 0x0C00)) | |
2c66daec TE |
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 | 282 | struct nfc_target *target = NULL; |
2c66daec TE |
283 | int rc; |
284 | ||
285 | if (IS_ERR(resp)) { | |
286 | rc = PTR_ERR(resp); | |
287 | resp = NULL; | |
288 | goto exit; | |
289 | } | |
290 | ||
291 | if (resp->len < sizeof(u16)) { | |
292 | rc = -EIO; | |
293 | goto exit; | |
294 | } | |
295 | ||
296 | target = kzalloc(sizeof(struct nfc_target), GFP_KERNEL); | |
297 | if (!target) { | |
298 | rc = -ENOMEM; | |
299 | goto exit; | |
300 | } | |
301 | ||
13292c9a | 302 | target->sens_res = __le16_to_cpu(*(__le16 *)resp->data); |
59ee2361 | 303 | |
13292c9a | 304 | if (!DIGITAL_SENS_RES_IS_VALID(target->sens_res)) { |
2c66daec TE |
305 | PROTOCOL_ERR("4.6.3.3"); |
306 | rc = -EINVAL; | |
307 | goto exit; | |
308 | } | |
309 | ||
13292c9a | 310 | if (DIGITAL_SENS_RES_IS_T1T(target->sens_res)) |
2c66daec TE |
311 | rc = digital_target_found(ddev, target, NFC_PROTO_JEWEL); |
312 | else | |
313 | rc = digital_in_send_sdd_req(ddev, target); | |
314 | ||
315 | exit: | |
316 | dev_kfree_skb(resp); | |
317 | ||
318 | if (rc) { | |
319 | kfree(target); | |
320 | digital_poll_next_tech(ddev); | |
321 | } | |
59ee2361 TE |
322 | } |
323 | ||
324 | int digital_in_send_sens_req(struct nfc_digital_dev *ddev, u8 rf_tech) | |
325 | { | |
326 | struct sk_buff *skb; | |
327 | int rc; | |
328 | ||
329 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, | |
330 | NFC_DIGITAL_RF_TECH_106A); | |
331 | if (rc) | |
332 | return rc; | |
333 | ||
334 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, | |
335 | NFC_DIGITAL_FRAMING_NFCA_SHORT); | |
336 | if (rc) | |
337 | return rc; | |
338 | ||
339 | skb = digital_skb_alloc(ddev, 1); | |
340 | if (!skb) | |
341 | return -ENOMEM; | |
342 | ||
343 | *skb_put(skb, sizeof(u8)) = DIGITAL_CMD_SENS_REQ; | |
344 | ||
345 | rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sens_res, NULL); | |
346 | if (rc) | |
347 | kfree_skb(skb); | |
348 | ||
349 | return rc; | |
350 | } | |
2c66daec TE |
351 | |
352 | int digital_in_recv_mifare_res(struct sk_buff *resp) | |
353 | { | |
354 | /* Successful READ command response is 16 data bytes + 2 CRC bytes long. | |
355 | * Since the driver can't differentiate a ACK/NACK response from a valid | |
356 | * READ response, the CRC calculation must be handled at digital level | |
357 | * even if the driver supports it for this technology. | |
358 | */ | |
359 | if (resp->len == DIGITAL_MIFARE_READ_RES_LEN + DIGITAL_CRC_LEN) { | |
360 | if (digital_skb_check_crc_a(resp)) { | |
361 | PROTOCOL_ERR("9.4.1.2"); | |
362 | return -EIO; | |
363 | } | |
364 | ||
365 | return 0; | |
366 | } | |
367 | ||
368 | /* ACK response (i.e. successful WRITE). */ | |
369 | if (resp->len == 1 && resp->data[0] == DIGITAL_MIFARE_ACK_RES) { | |
370 | resp->data[0] = 0; | |
371 | return 0; | |
372 | } | |
373 | ||
374 | /* NACK and any other responses are treated as error. */ | |
375 | return -EIO; | |
376 | } | |
8c0695e4 TE |
377 | |
378 | static void digital_in_recv_sensf_res(struct nfc_digital_dev *ddev, void *arg, | |
379 | struct sk_buff *resp) | |
380 | { | |
381 | int rc; | |
7d0911c0 | 382 | u8 proto; |
8c0695e4 TE |
383 | struct nfc_target target; |
384 | struct digital_sensf_res *sensf_res; | |
385 | ||
386 | if (IS_ERR(resp)) { | |
387 | rc = PTR_ERR(resp); | |
388 | resp = NULL; | |
389 | goto exit; | |
390 | } | |
391 | ||
392 | if (resp->len < DIGITAL_SENSF_RES_MIN_LENGTH) { | |
393 | rc = -EIO; | |
394 | goto exit; | |
395 | } | |
396 | ||
397 | if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) { | |
398 | rc = digital_skb_check_crc_f(resp); | |
399 | if (rc) { | |
400 | PROTOCOL_ERR("6.4.1.8"); | |
401 | goto exit; | |
402 | } | |
403 | } | |
404 | ||
405 | skb_pull(resp, 1); | |
406 | ||
407 | memset(&target, 0, sizeof(struct nfc_target)); | |
408 | ||
409 | sensf_res = (struct digital_sensf_res *)resp->data; | |
410 | ||
411 | memcpy(target.sensf_res, sensf_res, resp->len); | |
412 | target.sensf_res_len = resp->len; | |
413 | ||
414 | memcpy(target.nfcid2, sensf_res->nfcid2, NFC_NFCID2_MAXSIZE); | |
415 | target.nfcid2_len = NFC_NFCID2_MAXSIZE; | |
416 | ||
7d0911c0 TE |
417 | if (target.nfcid2[0] == DIGITAL_SENSF_NFCID2_NFC_DEP_B1 && |
418 | target.nfcid2[1] == DIGITAL_SENSF_NFCID2_NFC_DEP_B2) | |
419 | proto = NFC_PROTO_NFC_DEP; | |
420 | else | |
421 | proto = NFC_PROTO_FELICA; | |
422 | ||
423 | rc = digital_target_found(ddev, &target, proto); | |
8c0695e4 TE |
424 | |
425 | exit: | |
426 | dev_kfree_skb(resp); | |
427 | ||
428 | if (rc) | |
429 | digital_poll_next_tech(ddev); | |
430 | } | |
431 | ||
432 | int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech) | |
433 | { | |
434 | struct digital_sensf_req *sensf_req; | |
435 | struct sk_buff *skb; | |
436 | int rc; | |
437 | u8 size; | |
438 | ||
439 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech); | |
440 | if (rc) | |
441 | return rc; | |
442 | ||
443 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, | |
444 | NFC_DIGITAL_FRAMING_NFCF); | |
445 | if (rc) | |
446 | return rc; | |
447 | ||
448 | size = sizeof(struct digital_sensf_req); | |
449 | ||
450 | skb = digital_skb_alloc(ddev, size); | |
451 | if (!skb) | |
452 | return -ENOMEM; | |
453 | ||
454 | skb_put(skb, size); | |
455 | ||
456 | sensf_req = (struct digital_sensf_req *)skb->data; | |
457 | sensf_req->cmd = DIGITAL_CMD_SENSF_REQ; | |
458 | sensf_req->sc1 = 0xFF; | |
459 | sensf_req->sc2 = 0xFF; | |
460 | sensf_req->rc = 0; | |
461 | sensf_req->tsn = 0; | |
462 | ||
463 | *skb_push(skb, 1) = size + 1; | |
464 | ||
465 | if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) | |
466 | digital_skb_add_crc_f(skb); | |
467 | ||
468 | rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sensf_res, | |
469 | NULL); | |
470 | if (rc) | |
471 | kfree_skb(skb); | |
472 | ||
473 | return rc; | |
474 | } | |
1c7a4c24 TE |
475 | |
476 | static int digital_tg_send_sel_res(struct nfc_digital_dev *ddev) | |
477 | { | |
478 | struct sk_buff *skb; | |
479 | int rc; | |
480 | ||
481 | skb = digital_skb_alloc(ddev, 1); | |
482 | if (!skb) | |
483 | return -ENOMEM; | |
484 | ||
485 | *skb_put(skb, 1) = DIGITAL_SEL_RES_NFC_DEP; | |
486 | ||
487 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) | |
488 | digital_skb_add_crc_a(skb); | |
489 | ||
490 | rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_atr_req, | |
491 | NULL); | |
492 | if (rc) | |
493 | kfree_skb(skb); | |
494 | ||
495 | return rc; | |
496 | } | |
497 | ||
498 | static void digital_tg_recv_sel_req(struct nfc_digital_dev *ddev, void *arg, | |
499 | struct sk_buff *resp) | |
500 | { | |
501 | int rc; | |
502 | ||
503 | if (IS_ERR(resp)) { | |
504 | rc = PTR_ERR(resp); | |
505 | resp = NULL; | |
506 | goto exit; | |
507 | } | |
508 | ||
509 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) { | |
510 | rc = digital_skb_check_crc_a(resp); | |
511 | if (rc) { | |
512 | PROTOCOL_ERR("4.4.1.3"); | |
513 | goto exit; | |
514 | } | |
515 | } | |
516 | ||
517 | /* Silently ignore SEL_REQ content and send a SEL_RES for NFC-DEP */ | |
518 | ||
519 | rc = digital_tg_send_sel_res(ddev); | |
520 | ||
521 | exit: | |
522 | if (rc) | |
523 | digital_poll_next_tech(ddev); | |
524 | ||
525 | dev_kfree_skb(resp); | |
526 | } | |
527 | ||
528 | static int digital_tg_send_sdd_res(struct nfc_digital_dev *ddev) | |
529 | { | |
530 | struct sk_buff *skb; | |
531 | struct digital_sdd_res *sdd_res; | |
532 | int rc, i; | |
533 | ||
534 | skb = digital_skb_alloc(ddev, sizeof(struct digital_sdd_res)); | |
535 | if (!skb) | |
536 | return -ENOMEM; | |
537 | ||
538 | skb_put(skb, sizeof(struct digital_sdd_res)); | |
539 | sdd_res = (struct digital_sdd_res *)skb->data; | |
540 | ||
541 | sdd_res->nfcid1[0] = 0x08; | |
542 | get_random_bytes(sdd_res->nfcid1 + 1, 3); | |
543 | ||
544 | sdd_res->bcc = 0; | |
545 | for (i = 0; i < 4; i++) | |
546 | sdd_res->bcc ^= sdd_res->nfcid1[i]; | |
547 | ||
548 | rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_sel_req, | |
549 | NULL); | |
550 | if (rc) | |
551 | kfree_skb(skb); | |
552 | ||
553 | return rc; | |
554 | } | |
555 | ||
556 | static void digital_tg_recv_sdd_req(struct nfc_digital_dev *ddev, void *arg, | |
557 | struct sk_buff *resp) | |
558 | { | |
559 | u8 *sdd_req; | |
560 | int rc; | |
561 | ||
562 | if (IS_ERR(resp)) { | |
563 | rc = PTR_ERR(resp); | |
564 | resp = NULL; | |
565 | goto exit; | |
566 | } | |
567 | ||
568 | sdd_req = resp->data; | |
569 | ||
570 | if (resp->len < 2 || sdd_req[0] != DIGITAL_CMD_SEL_REQ_CL1 || | |
571 | sdd_req[1] != DIGITAL_SDD_REQ_SEL_PAR) { | |
572 | rc = -EINVAL; | |
573 | goto exit; | |
574 | } | |
575 | ||
576 | rc = digital_tg_send_sdd_res(ddev); | |
577 | ||
578 | exit: | |
579 | if (rc) | |
580 | digital_poll_next_tech(ddev); | |
581 | ||
582 | dev_kfree_skb(resp); | |
583 | } | |
584 | ||
585 | static int digital_tg_send_sens_res(struct nfc_digital_dev *ddev) | |
586 | { | |
587 | struct sk_buff *skb; | |
588 | u8 *sens_res; | |
589 | int rc; | |
590 | ||
591 | skb = digital_skb_alloc(ddev, 2); | |
592 | if (!skb) | |
593 | return -ENOMEM; | |
594 | ||
595 | sens_res = skb_put(skb, 2); | |
596 | ||
597 | sens_res[0] = (DIGITAL_SENS_RES_NFC_DEP >> 8) & 0xFF; | |
598 | sens_res[1] = DIGITAL_SENS_RES_NFC_DEP & 0xFF; | |
599 | ||
600 | rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_sdd_req, | |
601 | NULL); | |
602 | if (rc) | |
603 | kfree_skb(skb); | |
604 | ||
605 | return rc; | |
606 | } | |
607 | ||
608 | void digital_tg_recv_sens_req(struct nfc_digital_dev *ddev, void *arg, | |
609 | struct sk_buff *resp) | |
610 | { | |
611 | u8 sens_req; | |
612 | int rc; | |
613 | ||
614 | if (IS_ERR(resp)) { | |
615 | rc = PTR_ERR(resp); | |
616 | resp = NULL; | |
617 | goto exit; | |
618 | } | |
619 | ||
620 | sens_req = resp->data[0]; | |
621 | ||
622 | if (!resp->len || (sens_req != DIGITAL_CMD_SENS_REQ && | |
623 | sens_req != DIGITAL_CMD_ALL_REQ)) { | |
624 | rc = -EINVAL; | |
625 | goto exit; | |
626 | } | |
627 | ||
628 | rc = digital_tg_send_sens_res(ddev); | |
629 | ||
630 | exit: | |
631 | if (rc) | |
632 | digital_poll_next_tech(ddev); | |
633 | ||
634 | dev_kfree_skb(resp); | |
635 | } | |
636 | ||
180106bd | 637 | static int digital_tg_send_sensf_res(struct nfc_digital_dev *ddev, |
1c7a4c24 TE |
638 | struct digital_sensf_req *sensf_req) |
639 | { | |
640 | struct sk_buff *skb; | |
641 | u8 size; | |
642 | int rc; | |
643 | struct digital_sensf_res *sensf_res; | |
644 | ||
645 | size = sizeof(struct digital_sensf_res); | |
646 | ||
647 | if (sensf_req->rc != DIGITAL_SENSF_REQ_RC_NONE) | |
648 | size -= sizeof(sensf_res->rd); | |
649 | ||
650 | skb = digital_skb_alloc(ddev, size); | |
651 | if (!skb) | |
652 | return -ENOMEM; | |
653 | ||
654 | skb_put(skb, size); | |
655 | ||
656 | sensf_res = (struct digital_sensf_res *)skb->data; | |
657 | ||
658 | memset(sensf_res, 0, size); | |
659 | ||
660 | sensf_res->cmd = DIGITAL_CMD_SENSF_RES; | |
661 | sensf_res->nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1; | |
662 | sensf_res->nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2; | |
663 | get_random_bytes(&sensf_res->nfcid2[2], 6); | |
664 | ||
665 | switch (sensf_req->rc) { | |
666 | case DIGITAL_SENSF_REQ_RC_SC: | |
667 | sensf_res->rd[0] = sensf_req->sc1; | |
668 | sensf_res->rd[1] = sensf_req->sc2; | |
669 | break; | |
670 | case DIGITAL_SENSF_REQ_RC_AP: | |
671 | sensf_res->rd[0] = DIGITAL_SENSF_RES_RD_AP_B1; | |
672 | sensf_res->rd[1] = DIGITAL_SENSF_RES_RD_AP_B2; | |
673 | break; | |
674 | } | |
675 | ||
676 | *skb_push(skb, sizeof(u8)) = size + 1; | |
677 | ||
678 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) | |
679 | digital_skb_add_crc_f(skb); | |
680 | ||
681 | rc = digital_tg_send_cmd(ddev, skb, 300, | |
682 | digital_tg_recv_atr_req, NULL); | |
683 | if (rc) | |
684 | kfree_skb(skb); | |
685 | ||
686 | return rc; | |
687 | } | |
688 | ||
689 | void digital_tg_recv_sensf_req(struct nfc_digital_dev *ddev, void *arg, | |
690 | struct sk_buff *resp) | |
691 | { | |
692 | struct digital_sensf_req *sensf_req; | |
693 | int rc; | |
694 | ||
695 | if (IS_ERR(resp)) { | |
696 | rc = PTR_ERR(resp); | |
697 | resp = NULL; | |
698 | goto exit; | |
699 | } | |
700 | ||
701 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) { | |
702 | rc = digital_skb_check_crc_f(resp); | |
703 | if (rc) { | |
704 | PROTOCOL_ERR("6.4.1.8"); | |
705 | goto exit; | |
706 | } | |
707 | } | |
708 | ||
709 | if (resp->len != sizeof(struct digital_sensf_req) + 1) { | |
710 | rc = -EINVAL; | |
711 | goto exit; | |
712 | } | |
713 | ||
714 | skb_pull(resp, 1); | |
715 | sensf_req = (struct digital_sensf_req *)resp->data; | |
716 | ||
717 | if (sensf_req->cmd != DIGITAL_CMD_SENSF_REQ) { | |
718 | rc = -EINVAL; | |
719 | goto exit; | |
720 | } | |
721 | ||
722 | rc = digital_tg_send_sensf_res(ddev, sensf_req); | |
723 | ||
724 | exit: | |
725 | if (rc) | |
726 | digital_poll_next_tech(ddev); | |
727 | ||
728 | dev_kfree_skb(resp); | |
729 | } | |
730 | ||
731 | int digital_tg_listen_nfca(struct nfc_digital_dev *ddev, u8 rf_tech) | |
732 | { | |
733 | int rc; | |
734 | ||
735 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech); | |
736 | if (rc) | |
737 | return rc; | |
738 | ||
739 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, | |
740 | NFC_DIGITAL_FRAMING_NFCA_NFC_DEP); | |
741 | if (rc) | |
742 | return rc; | |
743 | ||
744 | return digital_tg_listen(ddev, 300, digital_tg_recv_sens_req, NULL); | |
745 | } | |
746 | ||
747 | int digital_tg_listen_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech) | |
748 | { | |
749 | int rc; | |
750 | u8 *nfcid2; | |
751 | ||
752 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech); | |
753 | if (rc) | |
754 | return rc; | |
755 | ||
756 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, | |
757 | NFC_DIGITAL_FRAMING_NFCF_NFC_DEP); | |
758 | if (rc) | |
759 | return rc; | |
760 | ||
761 | nfcid2 = kzalloc(NFC_NFCID2_MAXSIZE, GFP_KERNEL); | |
762 | if (!nfcid2) | |
763 | return -ENOMEM; | |
764 | ||
765 | nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1; | |
766 | nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2; | |
767 | get_random_bytes(nfcid2 + 2, NFC_NFCID2_MAXSIZE - 2); | |
768 | ||
769 | return digital_tg_listen(ddev, 300, digital_tg_recv_sensf_req, nfcid2); | |
770 | } |