Root/
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 | |
16 | #define pr_fmt(fmt) "digital: %s: " fmt, __func__ |
17 | |
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 | |
31 | #define DIGITAL_SEL_RES_NFCID1_COMPLETE(sel_res) (!((sel_res) & 0x04)) |
32 | #define DIGITAL_SEL_RES_IS_T2T(sel_res) (!((sel_res) & 0x60)) |
33 | #define DIGITAL_SEL_RES_IS_T4T(sel_res) ((sel_res) & 0x20) |
34 | #define DIGITAL_SEL_RES_IS_NFC_DEP(sel_res) ((sel_res) & 0x40) |
35 | |
36 | #define DIGITAL_SENS_RES_IS_T1T(sens_res) (((sens_res) & 0x0C00) == 0x0C00) |
37 | #define DIGITAL_SENS_RES_IS_VALID(sens_res) \ |
38 | ((!((sens_res) & 0x001F) && (((sens_res) & 0x0C00) == 0x0C00)) || \ |
39 | (((sens_res) & 0x001F) && ((sens_res) & 0x0C00) != 0x0C00)) |
40 | |
41 | #define DIGITAL_MIFARE_READ_RES_LEN 16 |
42 | #define DIGITAL_MIFARE_ACK_RES 0x0A |
43 | |
44 | #define DIGITAL_CMD_SENSF_REQ 0x00 |
45 | #define DIGITAL_CMD_SENSF_RES 0x01 |
46 | |
47 | #define DIGITAL_SENSF_RES_MIN_LENGTH 17 |
48 | #define DIGITAL_SENSF_RES_RD_AP_B1 0x00 |
49 | #define DIGITAL_SENSF_RES_RD_AP_B2 0x8F |
50 | |
51 | #define DIGITAL_SENSF_REQ_RC_NONE 0 |
52 | #define DIGITAL_SENSF_REQ_RC_SC 1 |
53 | #define DIGITAL_SENSF_REQ_RC_AP 2 |
54 | |
55 | #define DIGITAL_CMD_ISO15693_INVENTORY_REQ 0x01 |
56 | |
57 | #define DIGITAL_ISO15693_REQ_FLAG_DATA_RATE BIT(1) |
58 | #define DIGITAL_ISO15693_REQ_FLAG_INVENTORY BIT(2) |
59 | #define DIGITAL_ISO15693_REQ_FLAG_NB_SLOTS BIT(5) |
60 | #define DIGITAL_ISO15693_RES_FLAG_ERROR BIT(0) |
61 | #define DIGITAL_ISO15693_RES_IS_VALID(flags) \ |
62 | (!((flags) & DIGITAL_ISO15693_RES_FLAG_ERROR)) |
63 | |
64 | #define DIGITAL_ISO_DEP_I_PCB 0x02 |
65 | #define DIGITAL_ISO_DEP_PNI(pni) ((pni) & 0x01) |
66 | |
67 | #define DIGITAL_ISO_DEP_PCB_TYPE(pcb) ((pcb) & 0xC0) |
68 | |
69 | #define DIGITAL_ISO_DEP_I_BLOCK 0x00 |
70 | |
71 | #define DIGITAL_ISO_DEP_BLOCK_HAS_DID(pcb) ((pcb) & 0x08) |
72 | |
73 | static const u8 digital_ats_fsc[] = { |
74 | 16, 24, 32, 40, 48, 64, 96, 128, |
75 | }; |
76 | |
77 | #define DIGITAL_ATS_FSCI(t0) ((t0) & 0x0F) |
78 | #define DIGITAL_ATS_MAX_FSC 256 |
79 | |
80 | #define DIGITAL_RATS_BYTE1 0xE0 |
81 | #define DIGITAL_RATS_PARAM 0x80 |
82 | |
83 | struct digital_sdd_res { |
84 | u8 nfcid1[4]; |
85 | u8 bcc; |
86 | } __packed; |
87 | |
88 | struct digital_sel_req { |
89 | u8 sel_cmd; |
90 | u8 b2; |
91 | u8 nfcid1[4]; |
92 | u8 bcc; |
93 | } __packed; |
94 | |
95 | struct digital_sensf_req { |
96 | u8 cmd; |
97 | u8 sc1; |
98 | u8 sc2; |
99 | u8 rc; |
100 | u8 tsn; |
101 | } __packed; |
102 | |
103 | struct digital_sensf_res { |
104 | u8 cmd; |
105 | u8 nfcid2[8]; |
106 | u8 pad0[2]; |
107 | u8 pad1[3]; |
108 | u8 mrti_check; |
109 | u8 mrti_update; |
110 | u8 pad2; |
111 | u8 rd[2]; |
112 | } __packed; |
113 | |
114 | struct digital_iso15693_inv_req { |
115 | u8 flags; |
116 | u8 cmd; |
117 | u8 mask_len; |
118 | u64 mask; |
119 | } __packed; |
120 | |
121 | struct digital_iso15693_inv_res { |
122 | u8 flags; |
123 | u8 dsfid; |
124 | u64 uid; |
125 | } __packed; |
126 | |
127 | static int digital_in_send_sdd_req(struct nfc_digital_dev *ddev, |
128 | struct nfc_target *target); |
129 | |
130 | int digital_in_iso_dep_pull_sod(struct nfc_digital_dev *ddev, |
131 | struct sk_buff *skb) |
132 | { |
133 | u8 pcb; |
134 | u8 block_type; |
135 | |
136 | if (skb->len < 1) |
137 | return -EIO; |
138 | |
139 | pcb = *skb->data; |
140 | block_type = DIGITAL_ISO_DEP_PCB_TYPE(pcb); |
141 | |
142 | /* No support fo R-block nor S-block */ |
143 | if (block_type != DIGITAL_ISO_DEP_I_BLOCK) { |
144 | pr_err("ISO_DEP R-block and S-block not supported\n"); |
145 | return -EIO; |
146 | } |
147 | |
148 | if (DIGITAL_ISO_DEP_BLOCK_HAS_DID(pcb)) { |
149 | pr_err("DID field in ISO_DEP PCB not supported\n"); |
150 | return -EIO; |
151 | } |
152 | |
153 | skb_pull(skb, 1); |
154 | |
155 | return 0; |
156 | } |
157 | |
158 | int digital_in_iso_dep_push_sod(struct nfc_digital_dev *ddev, |
159 | struct sk_buff *skb) |
160 | { |
161 | /* |
162 | * Chaining not supported so skb->len + 1 PCB byte + 2 CRC bytes must |
163 | * not be greater than remote FSC |
164 | */ |
165 | if (skb->len + 3 > ddev->target_fsc) |
166 | return -EIO; |
167 | |
168 | skb_push(skb, 1); |
169 | |
170 | *skb->data = DIGITAL_ISO_DEP_I_PCB | ddev->curr_nfc_dep_pni; |
171 | |
172 | ddev->curr_nfc_dep_pni = |
173 | DIGITAL_ISO_DEP_PNI(ddev->curr_nfc_dep_pni + 1); |
174 | |
175 | return 0; |
176 | } |
177 | |
178 | static void digital_in_recv_ats(struct nfc_digital_dev *ddev, void *arg, |
179 | struct sk_buff *resp) |
180 | { |
181 | struct nfc_target *target = arg; |
182 | u8 fsdi; |
183 | int rc; |
184 | |
185 | if (IS_ERR(resp)) { |
186 | rc = PTR_ERR(resp); |
187 | resp = NULL; |
188 | goto exit; |
189 | } |
190 | |
191 | if (resp->len < 2) { |
192 | rc = -EIO; |
193 | goto exit; |
194 | } |
195 | |
196 | fsdi = DIGITAL_ATS_FSCI(resp->data[1]); |
197 | if (fsdi >= 8) |
198 | ddev->target_fsc = DIGITAL_ATS_MAX_FSC; |
199 | else |
200 | ddev->target_fsc = digital_ats_fsc[fsdi]; |
201 | |
202 | ddev->curr_nfc_dep_pni = 0; |
203 | |
204 | rc = digital_target_found(ddev, target, NFC_PROTO_ISO14443); |
205 | |
206 | exit: |
207 | dev_kfree_skb(resp); |
208 | kfree(target); |
209 | |
210 | if (rc) |
211 | digital_poll_next_tech(ddev); |
212 | } |
213 | |
214 | static int digital_in_send_rats(struct nfc_digital_dev *ddev, |
215 | struct nfc_target *target) |
216 | { |
217 | int rc; |
218 | struct sk_buff *skb; |
219 | |
220 | skb = digital_skb_alloc(ddev, 2); |
221 | if (!skb) |
222 | return -ENOMEM; |
223 | |
224 | *skb_put(skb, 1) = DIGITAL_RATS_BYTE1; |
225 | *skb_put(skb, 1) = DIGITAL_RATS_PARAM; |
226 | |
227 | rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_ats, |
228 | target); |
229 | if (rc) |
230 | kfree_skb(skb); |
231 | |
232 | return rc; |
233 | } |
234 | |
235 | static void digital_in_recv_sel_res(struct nfc_digital_dev *ddev, void *arg, |
236 | struct sk_buff *resp) |
237 | { |
238 | struct nfc_target *target = arg; |
239 | int rc; |
240 | u8 sel_res; |
241 | u8 nfc_proto; |
242 | |
243 | if (IS_ERR(resp)) { |
244 | rc = PTR_ERR(resp); |
245 | resp = NULL; |
246 | goto exit; |
247 | } |
248 | |
249 | if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) { |
250 | rc = digital_skb_check_crc_a(resp); |
251 | if (rc) { |
252 | PROTOCOL_ERR("4.4.1.3"); |
253 | goto exit; |
254 | } |
255 | } |
256 | |
257 | if (!resp->len) { |
258 | rc = -EIO; |
259 | goto exit; |
260 | } |
261 | |
262 | sel_res = resp->data[0]; |
263 | |
264 | if (!DIGITAL_SEL_RES_NFCID1_COMPLETE(sel_res)) { |
265 | rc = digital_in_send_sdd_req(ddev, target); |
266 | if (rc) |
267 | goto exit; |
268 | |
269 | goto exit_free_skb; |
270 | } |
271 | |
272 | target->sel_res = sel_res; |
273 | |
274 | if (DIGITAL_SEL_RES_IS_T2T(sel_res)) { |
275 | nfc_proto = NFC_PROTO_MIFARE; |
276 | } else if (DIGITAL_SEL_RES_IS_T4T(sel_res)) { |
277 | rc = digital_in_send_rats(ddev, target); |
278 | if (rc) |
279 | goto exit; |
280 | /* |
281 | * Skip target_found and don't free it for now. This will be |
282 | * done when receiving the ATS |
283 | */ |
284 | goto exit_free_skb; |
285 | } else if (DIGITAL_SEL_RES_IS_NFC_DEP(sel_res)) { |
286 | nfc_proto = NFC_PROTO_NFC_DEP; |
287 | } else { |
288 | rc = -EOPNOTSUPP; |
289 | goto exit; |
290 | } |
291 | |
292 | rc = digital_target_found(ddev, target, nfc_proto); |
293 | |
294 | exit: |
295 | kfree(target); |
296 | |
297 | exit_free_skb: |
298 | dev_kfree_skb(resp); |
299 | |
300 | if (rc) |
301 | digital_poll_next_tech(ddev); |
302 | } |
303 | |
304 | static int digital_in_send_sel_req(struct nfc_digital_dev *ddev, |
305 | struct nfc_target *target, |
306 | struct digital_sdd_res *sdd_res) |
307 | { |
308 | struct sk_buff *skb; |
309 | struct digital_sel_req *sel_req; |
310 | u8 sel_cmd; |
311 | int rc; |
312 | |
313 | skb = digital_skb_alloc(ddev, sizeof(struct digital_sel_req)); |
314 | if (!skb) |
315 | return -ENOMEM; |
316 | |
317 | skb_put(skb, sizeof(struct digital_sel_req)); |
318 | sel_req = (struct digital_sel_req *)skb->data; |
319 | |
320 | if (target->nfcid1_len <= 4) |
321 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL1; |
322 | else if (target->nfcid1_len < 10) |
323 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL2; |
324 | else |
325 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL3; |
326 | |
327 | sel_req->sel_cmd = sel_cmd; |
328 | sel_req->b2 = 0x70; |
329 | memcpy(sel_req->nfcid1, sdd_res->nfcid1, 4); |
330 | sel_req->bcc = sdd_res->bcc; |
331 | |
332 | if (DIGITAL_DRV_CAPS_IN_CRC(ddev)) { |
333 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
334 | NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A); |
335 | if (rc) |
336 | goto exit; |
337 | } else { |
338 | digital_skb_add_crc_a(skb); |
339 | } |
340 | |
341 | rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sel_res, |
342 | target); |
343 | exit: |
344 | if (rc) |
345 | kfree_skb(skb); |
346 | |
347 | return rc; |
348 | } |
349 | |
350 | static void digital_in_recv_sdd_res(struct nfc_digital_dev *ddev, void *arg, |
351 | struct sk_buff *resp) |
352 | { |
353 | struct nfc_target *target = arg; |
354 | struct digital_sdd_res *sdd_res; |
355 | int rc; |
356 | u8 offset, size; |
357 | u8 i, bcc; |
358 | |
359 | if (IS_ERR(resp)) { |
360 | rc = PTR_ERR(resp); |
361 | resp = NULL; |
362 | goto exit; |
363 | } |
364 | |
365 | if (resp->len < DIGITAL_SDD_RES_LEN) { |
366 | PROTOCOL_ERR("4.7.2.8"); |
367 | rc = -EINVAL; |
368 | goto exit; |
369 | } |
370 | |
371 | sdd_res = (struct digital_sdd_res *)resp->data; |
372 | |
373 | for (i = 0, bcc = 0; i < 4; i++) |
374 | bcc ^= sdd_res->nfcid1[i]; |
375 | |
376 | if (bcc != sdd_res->bcc) { |
377 | PROTOCOL_ERR("4.7.2.6"); |
378 | rc = -EINVAL; |
379 | goto exit; |
380 | } |
381 | |
382 | if (sdd_res->nfcid1[0] == DIGITAL_SDD_RES_CT) { |
383 | offset = 1; |
384 | size = 3; |
385 | } else { |
386 | offset = 0; |
387 | size = 4; |
388 | } |
389 | |
390 | memcpy(target->nfcid1 + target->nfcid1_len, sdd_res->nfcid1 + offset, |
391 | size); |
392 | target->nfcid1_len += size; |
393 | |
394 | rc = digital_in_send_sel_req(ddev, target, sdd_res); |
395 | |
396 | exit: |
397 | dev_kfree_skb(resp); |
398 | |
399 | if (rc) { |
400 | kfree(target); |
401 | digital_poll_next_tech(ddev); |
402 | } |
403 | } |
404 | |
405 | static int digital_in_send_sdd_req(struct nfc_digital_dev *ddev, |
406 | struct nfc_target *target) |
407 | { |
408 | int rc; |
409 | struct sk_buff *skb; |
410 | u8 sel_cmd; |
411 | |
412 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
413 | NFC_DIGITAL_FRAMING_NFCA_STANDARD); |
414 | if (rc) |
415 | return rc; |
416 | |
417 | skb = digital_skb_alloc(ddev, 2); |
418 | if (!skb) |
419 | return -ENOMEM; |
420 | |
421 | if (target->nfcid1_len == 0) |
422 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL1; |
423 | else if (target->nfcid1_len == 3) |
424 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL2; |
425 | else |
426 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL3; |
427 | |
428 | *skb_put(skb, sizeof(u8)) = sel_cmd; |
429 | *skb_put(skb, sizeof(u8)) = DIGITAL_SDD_REQ_SEL_PAR; |
430 | |
431 | return digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sdd_res, |
432 | target); |
433 | } |
434 | |
435 | static void digital_in_recv_sens_res(struct nfc_digital_dev *ddev, void *arg, |
436 | struct sk_buff *resp) |
437 | { |
438 | struct nfc_target *target = NULL; |
439 | int rc; |
440 | |
441 | if (IS_ERR(resp)) { |
442 | rc = PTR_ERR(resp); |
443 | resp = NULL; |
444 | goto exit; |
445 | } |
446 | |
447 | if (resp->len < sizeof(u16)) { |
448 | rc = -EIO; |
449 | goto exit; |
450 | } |
451 | |
452 | target = kzalloc(sizeof(struct nfc_target), GFP_KERNEL); |
453 | if (!target) { |
454 | rc = -ENOMEM; |
455 | goto exit; |
456 | } |
457 | |
458 | target->sens_res = __le16_to_cpu(*(__le16 *)resp->data); |
459 | |
460 | if (!DIGITAL_SENS_RES_IS_VALID(target->sens_res)) { |
461 | PROTOCOL_ERR("4.6.3.3"); |
462 | rc = -EINVAL; |
463 | goto exit; |
464 | } |
465 | |
466 | if (DIGITAL_SENS_RES_IS_T1T(target->sens_res)) |
467 | rc = digital_target_found(ddev, target, NFC_PROTO_JEWEL); |
468 | else |
469 | rc = digital_in_send_sdd_req(ddev, target); |
470 | |
471 | exit: |
472 | dev_kfree_skb(resp); |
473 | |
474 | if (rc) { |
475 | kfree(target); |
476 | digital_poll_next_tech(ddev); |
477 | } |
478 | } |
479 | |
480 | int digital_in_send_sens_req(struct nfc_digital_dev *ddev, u8 rf_tech) |
481 | { |
482 | struct sk_buff *skb; |
483 | int rc; |
484 | |
485 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, |
486 | NFC_DIGITAL_RF_TECH_106A); |
487 | if (rc) |
488 | return rc; |
489 | |
490 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
491 | NFC_DIGITAL_FRAMING_NFCA_SHORT); |
492 | if (rc) |
493 | return rc; |
494 | |
495 | skb = digital_skb_alloc(ddev, 1); |
496 | if (!skb) |
497 | return -ENOMEM; |
498 | |
499 | *skb_put(skb, sizeof(u8)) = DIGITAL_CMD_SENS_REQ; |
500 | |
501 | rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sens_res, NULL); |
502 | if (rc) |
503 | kfree_skb(skb); |
504 | |
505 | return rc; |
506 | } |
507 | |
508 | int digital_in_recv_mifare_res(struct sk_buff *resp) |
509 | { |
510 | /* Successful READ command response is 16 data bytes + 2 CRC bytes long. |
511 | * Since the driver can't differentiate a ACK/NACK response from a valid |
512 | * READ response, the CRC calculation must be handled at digital level |
513 | * even if the driver supports it for this technology. |
514 | */ |
515 | if (resp->len == DIGITAL_MIFARE_READ_RES_LEN + DIGITAL_CRC_LEN) { |
516 | if (digital_skb_check_crc_a(resp)) { |
517 | PROTOCOL_ERR("9.4.1.2"); |
518 | return -EIO; |
519 | } |
520 | |
521 | return 0; |
522 | } |
523 | |
524 | /* ACK response (i.e. successful WRITE). */ |
525 | if (resp->len == 1 && resp->data[0] == DIGITAL_MIFARE_ACK_RES) { |
526 | resp->data[0] = 0; |
527 | return 0; |
528 | } |
529 | |
530 | /* NACK and any other responses are treated as error. */ |
531 | return -EIO; |
532 | } |
533 | |
534 | static void digital_in_recv_sensf_res(struct nfc_digital_dev *ddev, void *arg, |
535 | struct sk_buff *resp) |
536 | { |
537 | int rc; |
538 | u8 proto; |
539 | struct nfc_target target; |
540 | struct digital_sensf_res *sensf_res; |
541 | |
542 | if (IS_ERR(resp)) { |
543 | rc = PTR_ERR(resp); |
544 | resp = NULL; |
545 | goto exit; |
546 | } |
547 | |
548 | if (resp->len < DIGITAL_SENSF_RES_MIN_LENGTH) { |
549 | rc = -EIO; |
550 | goto exit; |
551 | } |
552 | |
553 | if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) { |
554 | rc = digital_skb_check_crc_f(resp); |
555 | if (rc) { |
556 | PROTOCOL_ERR("6.4.1.8"); |
557 | goto exit; |
558 | } |
559 | } |
560 | |
561 | skb_pull(resp, 1); |
562 | |
563 | memset(&target, 0, sizeof(struct nfc_target)); |
564 | |
565 | sensf_res = (struct digital_sensf_res *)resp->data; |
566 | |
567 | memcpy(target.sensf_res, sensf_res, resp->len); |
568 | target.sensf_res_len = resp->len; |
569 | |
570 | memcpy(target.nfcid2, sensf_res->nfcid2, NFC_NFCID2_MAXSIZE); |
571 | target.nfcid2_len = NFC_NFCID2_MAXSIZE; |
572 | |
573 | if (target.nfcid2[0] == DIGITAL_SENSF_NFCID2_NFC_DEP_B1 && |
574 | target.nfcid2[1] == DIGITAL_SENSF_NFCID2_NFC_DEP_B2) |
575 | proto = NFC_PROTO_NFC_DEP; |
576 | else |
577 | proto = NFC_PROTO_FELICA; |
578 | |
579 | rc = digital_target_found(ddev, &target, proto); |
580 | |
581 | exit: |
582 | dev_kfree_skb(resp); |
583 | |
584 | if (rc) |
585 | digital_poll_next_tech(ddev); |
586 | } |
587 | |
588 | int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech) |
589 | { |
590 | struct digital_sensf_req *sensf_req; |
591 | struct sk_buff *skb; |
592 | int rc; |
593 | u8 size; |
594 | |
595 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech); |
596 | if (rc) |
597 | return rc; |
598 | |
599 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
600 | NFC_DIGITAL_FRAMING_NFCF); |
601 | if (rc) |
602 | return rc; |
603 | |
604 | size = sizeof(struct digital_sensf_req); |
605 | |
606 | skb = digital_skb_alloc(ddev, size); |
607 | if (!skb) |
608 | return -ENOMEM; |
609 | |
610 | skb_put(skb, size); |
611 | |
612 | sensf_req = (struct digital_sensf_req *)skb->data; |
613 | sensf_req->cmd = DIGITAL_CMD_SENSF_REQ; |
614 | sensf_req->sc1 = 0xFF; |
615 | sensf_req->sc2 = 0xFF; |
616 | sensf_req->rc = 0; |
617 | sensf_req->tsn = 0; |
618 | |
619 | *skb_push(skb, 1) = size + 1; |
620 | |
621 | if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) |
622 | digital_skb_add_crc_f(skb); |
623 | |
624 | rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sensf_res, |
625 | NULL); |
626 | if (rc) |
627 | kfree_skb(skb); |
628 | |
629 | return rc; |
630 | } |
631 | |
632 | static void digital_in_recv_iso15693_inv_res(struct nfc_digital_dev *ddev, |
633 | void *arg, struct sk_buff *resp) |
634 | { |
635 | struct digital_iso15693_inv_res *res; |
636 | struct nfc_target *target = NULL; |
637 | int rc; |
638 | |
639 | if (IS_ERR(resp)) { |
640 | rc = PTR_ERR(resp); |
641 | resp = NULL; |
642 | goto out_free_skb; |
643 | } |
644 | |
645 | if (resp->len != sizeof(*res)) { |
646 | rc = -EIO; |
647 | goto out_free_skb; |
648 | } |
649 | |
650 | res = (struct digital_iso15693_inv_res *)resp->data; |
651 | |
652 | if (!DIGITAL_ISO15693_RES_IS_VALID(res->flags)) { |
653 | PROTOCOL_ERR("ISO15693 - 10.3.1"); |
654 | rc = -EINVAL; |
655 | goto out_free_skb; |
656 | } |
657 | |
658 | target = kzalloc(sizeof(*target), GFP_KERNEL); |
659 | if (!target) { |
660 | rc = -ENOMEM; |
661 | goto out_free_skb; |
662 | } |
663 | |
664 | target->is_iso15693 = 1; |
665 | target->iso15693_dsfid = res->dsfid; |
666 | memcpy(target->iso15693_uid, &res->uid, sizeof(target->iso15693_uid)); |
667 | |
668 | rc = digital_target_found(ddev, target, NFC_PROTO_ISO15693); |
669 | |
670 | kfree(target); |
671 | |
672 | out_free_skb: |
673 | dev_kfree_skb(resp); |
674 | |
675 | if (rc) |
676 | digital_poll_next_tech(ddev); |
677 | } |
678 | |
679 | int digital_in_send_iso15693_inv_req(struct nfc_digital_dev *ddev, u8 rf_tech) |
680 | { |
681 | struct digital_iso15693_inv_req *req; |
682 | struct sk_buff *skb; |
683 | int rc; |
684 | |
685 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, |
686 | NFC_DIGITAL_RF_TECH_ISO15693); |
687 | if (rc) |
688 | return rc; |
689 | |
690 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
691 | NFC_DIGITAL_FRAMING_ISO15693_INVENTORY); |
692 | if (rc) |
693 | return rc; |
694 | |
695 | skb = digital_skb_alloc(ddev, sizeof(*req)); |
696 | if (!skb) |
697 | return -ENOMEM; |
698 | |
699 | skb_put(skb, sizeof(*req) - sizeof(req->mask)); /* No mask */ |
700 | req = (struct digital_iso15693_inv_req *)skb->data; |
701 | |
702 | /* Single sub-carrier, high data rate, no AFI, single slot |
703 | * Inventory command |
704 | */ |
705 | req->flags = DIGITAL_ISO15693_REQ_FLAG_DATA_RATE | |
706 | DIGITAL_ISO15693_REQ_FLAG_INVENTORY | |
707 | DIGITAL_ISO15693_REQ_FLAG_NB_SLOTS; |
708 | req->cmd = DIGITAL_CMD_ISO15693_INVENTORY_REQ; |
709 | req->mask_len = 0; |
710 | |
711 | rc = digital_in_send_cmd(ddev, skb, 30, |
712 | digital_in_recv_iso15693_inv_res, NULL); |
713 | if (rc) |
714 | kfree_skb(skb); |
715 | |
716 | return rc; |
717 | } |
718 | |
719 | static int digital_tg_send_sel_res(struct nfc_digital_dev *ddev) |
720 | { |
721 | struct sk_buff *skb; |
722 | int rc; |
723 | |
724 | skb = digital_skb_alloc(ddev, 1); |
725 | if (!skb) |
726 | return -ENOMEM; |
727 | |
728 | *skb_put(skb, 1) = DIGITAL_SEL_RES_NFC_DEP; |
729 | |
730 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) |
731 | digital_skb_add_crc_a(skb); |
732 | |
733 | rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_atr_req, |
734 | NULL); |
735 | if (rc) |
736 | kfree_skb(skb); |
737 | |
738 | return rc; |
739 | } |
740 | |
741 | static void digital_tg_recv_sel_req(struct nfc_digital_dev *ddev, void *arg, |
742 | struct sk_buff *resp) |
743 | { |
744 | int rc; |
745 | |
746 | if (IS_ERR(resp)) { |
747 | rc = PTR_ERR(resp); |
748 | resp = NULL; |
749 | goto exit; |
750 | } |
751 | |
752 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) { |
753 | rc = digital_skb_check_crc_a(resp); |
754 | if (rc) { |
755 | PROTOCOL_ERR("4.4.1.3"); |
756 | goto exit; |
757 | } |
758 | } |
759 | |
760 | /* Silently ignore SEL_REQ content and send a SEL_RES for NFC-DEP */ |
761 | |
762 | rc = digital_tg_send_sel_res(ddev); |
763 | |
764 | exit: |
765 | if (rc) |
766 | digital_poll_next_tech(ddev); |
767 | |
768 | dev_kfree_skb(resp); |
769 | } |
770 | |
771 | static int digital_tg_send_sdd_res(struct nfc_digital_dev *ddev) |
772 | { |
773 | struct sk_buff *skb; |
774 | struct digital_sdd_res *sdd_res; |
775 | int rc, i; |
776 | |
777 | skb = digital_skb_alloc(ddev, sizeof(struct digital_sdd_res)); |
778 | if (!skb) |
779 | return -ENOMEM; |
780 | |
781 | skb_put(skb, sizeof(struct digital_sdd_res)); |
782 | sdd_res = (struct digital_sdd_res *)skb->data; |
783 | |
784 | sdd_res->nfcid1[0] = 0x08; |
785 | get_random_bytes(sdd_res->nfcid1 + 1, 3); |
786 | |
787 | sdd_res->bcc = 0; |
788 | for (i = 0; i < 4; i++) |
789 | sdd_res->bcc ^= sdd_res->nfcid1[i]; |
790 | |
791 | rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_sel_req, |
792 | NULL); |
793 | if (rc) |
794 | kfree_skb(skb); |
795 | |
796 | return rc; |
797 | } |
798 | |
799 | static void digital_tg_recv_sdd_req(struct nfc_digital_dev *ddev, void *arg, |
800 | struct sk_buff *resp) |
801 | { |
802 | u8 *sdd_req; |
803 | int rc; |
804 | |
805 | if (IS_ERR(resp)) { |
806 | rc = PTR_ERR(resp); |
807 | resp = NULL; |
808 | goto exit; |
809 | } |
810 | |
811 | sdd_req = resp->data; |
812 | |
813 | if (resp->len < 2 || sdd_req[0] != DIGITAL_CMD_SEL_REQ_CL1 || |
814 | sdd_req[1] != DIGITAL_SDD_REQ_SEL_PAR) { |
815 | rc = -EINVAL; |
816 | goto exit; |
817 | } |
818 | |
819 | rc = digital_tg_send_sdd_res(ddev); |
820 | |
821 | exit: |
822 | if (rc) |
823 | digital_poll_next_tech(ddev); |
824 | |
825 | dev_kfree_skb(resp); |
826 | } |
827 | |
828 | static int digital_tg_send_sens_res(struct nfc_digital_dev *ddev) |
829 | { |
830 | struct sk_buff *skb; |
831 | u8 *sens_res; |
832 | int rc; |
833 | |
834 | skb = digital_skb_alloc(ddev, 2); |
835 | if (!skb) |
836 | return -ENOMEM; |
837 | |
838 | sens_res = skb_put(skb, 2); |
839 | |
840 | sens_res[0] = (DIGITAL_SENS_RES_NFC_DEP >> 8) & 0xFF; |
841 | sens_res[1] = DIGITAL_SENS_RES_NFC_DEP & 0xFF; |
842 | |
843 | rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_sdd_req, |
844 | NULL); |
845 | if (rc) |
846 | kfree_skb(skb); |
847 | |
848 | return rc; |
849 | } |
850 | |
851 | void digital_tg_recv_sens_req(struct nfc_digital_dev *ddev, void *arg, |
852 | struct sk_buff *resp) |
853 | { |
854 | u8 sens_req; |
855 | int rc; |
856 | |
857 | if (IS_ERR(resp)) { |
858 | rc = PTR_ERR(resp); |
859 | resp = NULL; |
860 | goto exit; |
861 | } |
862 | |
863 | sens_req = resp->data[0]; |
864 | |
865 | if (!resp->len || (sens_req != DIGITAL_CMD_SENS_REQ && |
866 | sens_req != DIGITAL_CMD_ALL_REQ)) { |
867 | rc = -EINVAL; |
868 | goto exit; |
869 | } |
870 | |
871 | rc = digital_tg_send_sens_res(ddev); |
872 | |
873 | exit: |
874 | if (rc) |
875 | digital_poll_next_tech(ddev); |
876 | |
877 | dev_kfree_skb(resp); |
878 | } |
879 | |
880 | static int digital_tg_send_sensf_res(struct nfc_digital_dev *ddev, |
881 | struct digital_sensf_req *sensf_req) |
882 | { |
883 | struct sk_buff *skb; |
884 | u8 size; |
885 | int rc; |
886 | struct digital_sensf_res *sensf_res; |
887 | |
888 | size = sizeof(struct digital_sensf_res); |
889 | |
890 | if (sensf_req->rc != DIGITAL_SENSF_REQ_RC_NONE) |
891 | size -= sizeof(sensf_res->rd); |
892 | |
893 | skb = digital_skb_alloc(ddev, size); |
894 | if (!skb) |
895 | return -ENOMEM; |
896 | |
897 | skb_put(skb, size); |
898 | |
899 | sensf_res = (struct digital_sensf_res *)skb->data; |
900 | |
901 | memset(sensf_res, 0, size); |
902 | |
903 | sensf_res->cmd = DIGITAL_CMD_SENSF_RES; |
904 | sensf_res->nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1; |
905 | sensf_res->nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2; |
906 | get_random_bytes(&sensf_res->nfcid2[2], 6); |
907 | |
908 | switch (sensf_req->rc) { |
909 | case DIGITAL_SENSF_REQ_RC_SC: |
910 | sensf_res->rd[0] = sensf_req->sc1; |
911 | sensf_res->rd[1] = sensf_req->sc2; |
912 | break; |
913 | case DIGITAL_SENSF_REQ_RC_AP: |
914 | sensf_res->rd[0] = DIGITAL_SENSF_RES_RD_AP_B1; |
915 | sensf_res->rd[1] = DIGITAL_SENSF_RES_RD_AP_B2; |
916 | break; |
917 | } |
918 | |
919 | *skb_push(skb, sizeof(u8)) = size + 1; |
920 | |
921 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) |
922 | digital_skb_add_crc_f(skb); |
923 | |
924 | rc = digital_tg_send_cmd(ddev, skb, 300, |
925 | digital_tg_recv_atr_req, NULL); |
926 | if (rc) |
927 | kfree_skb(skb); |
928 | |
929 | return rc; |
930 | } |
931 | |
932 | void digital_tg_recv_sensf_req(struct nfc_digital_dev *ddev, void *arg, |
933 | struct sk_buff *resp) |
934 | { |
935 | struct digital_sensf_req *sensf_req; |
936 | int rc; |
937 | |
938 | if (IS_ERR(resp)) { |
939 | rc = PTR_ERR(resp); |
940 | resp = NULL; |
941 | goto exit; |
942 | } |
943 | |
944 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) { |
945 | rc = digital_skb_check_crc_f(resp); |
946 | if (rc) { |
947 | PROTOCOL_ERR("6.4.1.8"); |
948 | goto exit; |
949 | } |
950 | } |
951 | |
952 | if (resp->len != sizeof(struct digital_sensf_req) + 1) { |
953 | rc = -EINVAL; |
954 | goto exit; |
955 | } |
956 | |
957 | skb_pull(resp, 1); |
958 | sensf_req = (struct digital_sensf_req *)resp->data; |
959 | |
960 | if (sensf_req->cmd != DIGITAL_CMD_SENSF_REQ) { |
961 | rc = -EINVAL; |
962 | goto exit; |
963 | } |
964 | |
965 | rc = digital_tg_send_sensf_res(ddev, sensf_req); |
966 | |
967 | exit: |
968 | if (rc) |
969 | digital_poll_next_tech(ddev); |
970 | |
971 | dev_kfree_skb(resp); |
972 | } |
973 | |
974 | int digital_tg_listen_nfca(struct nfc_digital_dev *ddev, u8 rf_tech) |
975 | { |
976 | int rc; |
977 | |
978 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech); |
979 | if (rc) |
980 | return rc; |
981 | |
982 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
983 | NFC_DIGITAL_FRAMING_NFCA_NFC_DEP); |
984 | if (rc) |
985 | return rc; |
986 | |
987 | return digital_tg_listen(ddev, 300, digital_tg_recv_sens_req, NULL); |
988 | } |
989 | |
990 | int digital_tg_listen_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech) |
991 | { |
992 | int rc; |
993 | u8 *nfcid2; |
994 | |
995 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech); |
996 | if (rc) |
997 | return rc; |
998 | |
999 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
1000 | NFC_DIGITAL_FRAMING_NFCF_NFC_DEP); |
1001 | if (rc) |
1002 | return rc; |
1003 | |
1004 | nfcid2 = kzalloc(NFC_NFCID2_MAXSIZE, GFP_KERNEL); |
1005 | if (!nfcid2) |
1006 | return -ENOMEM; |
1007 | |
1008 | nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1; |
1009 | nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2; |
1010 | get_random_bytes(nfcid2 + 2, NFC_NFCID2_MAXSIZE - 2); |
1011 | |
1012 | return digital_tg_listen(ddev, 300, digital_tg_recv_sensf_req, nfcid2); |
1013 | } |
1014 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
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Tags:
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od-2011-09-18
v2.6.34-rc5
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v3.9