1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * NFC Digital Protocol stack |
4 | * Copyright (c) 2013, Intel Corporation. |
5 | */ |
6 | |
7 | #define pr_fmt(fmt) "digital: %s: " fmt, __func__ |
8 | |
9 | #include "digital.h" |
10 | |
11 | #define DIGITAL_CMD_SENS_REQ 0x26 |
12 | #define DIGITAL_CMD_ALL_REQ 0x52 |
13 | #define DIGITAL_CMD_SEL_REQ_CL1 0x93 |
14 | #define DIGITAL_CMD_SEL_REQ_CL2 0x95 |
15 | #define DIGITAL_CMD_SEL_REQ_CL3 0x97 |
16 | |
17 | #define DIGITAL_SDD_REQ_SEL_PAR 0x20 |
18 | |
19 | #define DIGITAL_SDD_RES_CT 0x88 |
20 | #define DIGITAL_SDD_RES_LEN 5 |
21 | #define DIGITAL_SEL_RES_LEN 1 |
22 | |
23 | #define DIGITAL_SEL_RES_NFCID1_COMPLETE(sel_res) (!((sel_res) & 0x04)) |
24 | #define DIGITAL_SEL_RES_IS_T2T(sel_res) (!((sel_res) & 0x60)) |
25 | #define DIGITAL_SEL_RES_IS_T4T(sel_res) ((sel_res) & 0x20) |
26 | #define DIGITAL_SEL_RES_IS_NFC_DEP(sel_res) ((sel_res) & 0x40) |
27 | |
28 | #define DIGITAL_SENS_RES_IS_T1T(sens_res) (((sens_res) & 0x0C00) == 0x0C00) |
29 | #define DIGITAL_SENS_RES_IS_VALID(sens_res) \ |
30 | ((!((sens_res) & 0x001F) && (((sens_res) & 0x0C00) == 0x0C00)) || \ |
31 | (((sens_res) & 0x001F) && ((sens_res) & 0x0C00) != 0x0C00)) |
32 | |
33 | #define DIGITAL_MIFARE_READ_RES_LEN 16 |
34 | #define DIGITAL_MIFARE_ACK_RES 0x0A |
35 | |
36 | #define DIGITAL_CMD_SENSB_REQ 0x05 |
37 | #define DIGITAL_SENSB_ADVANCED BIT(5) |
38 | #define DIGITAL_SENSB_EXTENDED BIT(4) |
39 | #define DIGITAL_SENSB_ALLB_REQ BIT(3) |
40 | #define DIGITAL_SENSB_N(n) ((n) & 0x7) |
41 | |
42 | #define DIGITAL_CMD_SENSB_RES 0x50 |
43 | |
44 | #define DIGITAL_CMD_ATTRIB_REQ 0x1D |
45 | #define DIGITAL_ATTRIB_P1_TR0_DEFAULT (0x0 << 6) |
46 | #define DIGITAL_ATTRIB_P1_TR1_DEFAULT (0x0 << 4) |
47 | #define DIGITAL_ATTRIB_P1_SUPRESS_EOS BIT(3) |
48 | #define DIGITAL_ATTRIB_P1_SUPRESS_SOS BIT(2) |
49 | #define DIGITAL_ATTRIB_P2_LISTEN_POLL_1 (0x0 << 6) |
50 | #define DIGITAL_ATTRIB_P2_POLL_LISTEN_1 (0x0 << 4) |
51 | #define DIGITAL_ATTRIB_P2_MAX_FRAME_256 0x8 |
52 | #define DIGITAL_ATTRIB_P4_DID(n) ((n) & 0xf) |
53 | |
54 | #define DIGITAL_CMD_SENSF_REQ 0x00 |
55 | #define DIGITAL_CMD_SENSF_RES 0x01 |
56 | |
57 | #define DIGITAL_SENSF_RES_MIN_LENGTH 17 |
58 | #define DIGITAL_SENSF_RES_RD_AP_B1 0x00 |
59 | #define DIGITAL_SENSF_RES_RD_AP_B2 0x8F |
60 | |
61 | #define DIGITAL_SENSF_REQ_RC_NONE 0 |
62 | #define DIGITAL_SENSF_REQ_RC_SC 1 |
63 | #define DIGITAL_SENSF_REQ_RC_AP 2 |
64 | |
65 | #define DIGITAL_CMD_ISO15693_INVENTORY_REQ 0x01 |
66 | |
67 | #define DIGITAL_ISO15693_REQ_FLAG_DATA_RATE BIT(1) |
68 | #define DIGITAL_ISO15693_REQ_FLAG_INVENTORY BIT(2) |
69 | #define DIGITAL_ISO15693_REQ_FLAG_NB_SLOTS BIT(5) |
70 | #define DIGITAL_ISO15693_RES_FLAG_ERROR BIT(0) |
71 | #define DIGITAL_ISO15693_RES_IS_VALID(flags) \ |
72 | (!((flags) & DIGITAL_ISO15693_RES_FLAG_ERROR)) |
73 | |
74 | #define DIGITAL_ISO_DEP_I_PCB 0x02 |
75 | #define DIGITAL_ISO_DEP_PNI(pni) ((pni) & 0x01) |
76 | |
77 | #define DIGITAL_ISO_DEP_PCB_TYPE(pcb) ((pcb) & 0xC0) |
78 | |
79 | #define DIGITAL_ISO_DEP_I_BLOCK 0x00 |
80 | |
81 | #define DIGITAL_ISO_DEP_BLOCK_HAS_DID(pcb) ((pcb) & 0x08) |
82 | |
83 | static const u8 digital_ats_fsc[] = { |
84 | 16, 24, 32, 40, 48, 64, 96, 128, |
85 | }; |
86 | |
87 | #define DIGITAL_ATS_FSCI(t0) ((t0) & 0x0F) |
88 | #define DIGITAL_SENSB_FSCI(pi2) (((pi2) & 0xF0) >> 4) |
89 | #define DIGITAL_ATS_MAX_FSC 256 |
90 | |
91 | #define DIGITAL_RATS_BYTE1 0xE0 |
92 | #define DIGITAL_RATS_PARAM 0x80 |
93 | |
94 | struct digital_sdd_res { |
95 | u8 nfcid1[4]; |
96 | u8 bcc; |
97 | } __packed; |
98 | |
99 | struct digital_sel_req { |
100 | u8 sel_cmd; |
101 | u8 b2; |
102 | u8 nfcid1[4]; |
103 | u8 bcc; |
104 | } __packed; |
105 | |
106 | struct digital_sensb_req { |
107 | u8 cmd; |
108 | u8 afi; |
109 | u8 param; |
110 | } __packed; |
111 | |
112 | struct digital_sensb_res { |
113 | u8 cmd; |
114 | u8 nfcid0[4]; |
115 | u8 app_data[4]; |
116 | u8 proto_info[3]; |
117 | } __packed; |
118 | |
119 | struct digital_attrib_req { |
120 | u8 cmd; |
121 | u8 nfcid0[4]; |
122 | u8 param1; |
123 | u8 param2; |
124 | u8 param3; |
125 | u8 param4; |
126 | } __packed; |
127 | |
128 | struct digital_attrib_res { |
129 | u8 mbli_did; |
130 | } __packed; |
131 | |
132 | struct digital_sensf_req { |
133 | u8 cmd; |
134 | u8 sc1; |
135 | u8 sc2; |
136 | u8 rc; |
137 | u8 tsn; |
138 | } __packed; |
139 | |
140 | struct digital_sensf_res { |
141 | u8 cmd; |
142 | u8 nfcid2[8]; |
143 | u8 pad0[2]; |
144 | u8 pad1[3]; |
145 | u8 mrti_check; |
146 | u8 mrti_update; |
147 | u8 pad2; |
148 | u8 rd[2]; |
149 | } __packed; |
150 | |
151 | struct digital_iso15693_inv_req { |
152 | u8 flags; |
153 | u8 cmd; |
154 | u8 mask_len; |
155 | u64 mask; |
156 | } __packed; |
157 | |
158 | struct digital_iso15693_inv_res { |
159 | u8 flags; |
160 | u8 dsfid; |
161 | u64 uid; |
162 | } __packed; |
163 | |
164 | static int digital_in_send_sdd_req(struct nfc_digital_dev *ddev, |
165 | struct nfc_target *target); |
166 | |
167 | int digital_in_iso_dep_pull_sod(struct nfc_digital_dev *ddev, |
168 | struct sk_buff *skb) |
169 | { |
170 | u8 pcb; |
171 | u8 block_type; |
172 | |
173 | if (skb->len < 1) |
174 | return -EIO; |
175 | |
176 | pcb = *skb->data; |
177 | block_type = DIGITAL_ISO_DEP_PCB_TYPE(pcb); |
178 | |
179 | /* No support fo R-block nor S-block */ |
180 | if (block_type != DIGITAL_ISO_DEP_I_BLOCK) { |
181 | pr_err("ISO_DEP R-block and S-block not supported\n" ); |
182 | return -EIO; |
183 | } |
184 | |
185 | if (DIGITAL_ISO_DEP_BLOCK_HAS_DID(pcb)) { |
186 | pr_err("DID field in ISO_DEP PCB not supported\n" ); |
187 | return -EIO; |
188 | } |
189 | |
190 | skb_pull(skb, len: 1); |
191 | |
192 | return 0; |
193 | } |
194 | |
195 | int digital_in_iso_dep_push_sod(struct nfc_digital_dev *ddev, |
196 | struct sk_buff *skb) |
197 | { |
198 | /* |
199 | * Chaining not supported so skb->len + 1 PCB byte + 2 CRC bytes must |
200 | * not be greater than remote FSC |
201 | */ |
202 | if (skb->len + 3 > ddev->target_fsc) |
203 | return -EIO; |
204 | |
205 | skb_push(skb, len: 1); |
206 | |
207 | *skb->data = DIGITAL_ISO_DEP_I_PCB | ddev->curr_nfc_dep_pni; |
208 | |
209 | ddev->curr_nfc_dep_pni = |
210 | DIGITAL_ISO_DEP_PNI(ddev->curr_nfc_dep_pni + 1); |
211 | |
212 | return 0; |
213 | } |
214 | |
215 | static void digital_in_recv_ats(struct nfc_digital_dev *ddev, void *arg, |
216 | struct sk_buff *resp) |
217 | { |
218 | struct nfc_target *target = arg; |
219 | u8 fsdi; |
220 | int rc; |
221 | |
222 | if (IS_ERR(ptr: resp)) { |
223 | rc = PTR_ERR(ptr: resp); |
224 | resp = NULL; |
225 | goto exit; |
226 | } |
227 | |
228 | if (resp->len < 2) { |
229 | rc = -EIO; |
230 | goto exit; |
231 | } |
232 | |
233 | fsdi = DIGITAL_ATS_FSCI(resp->data[1]); |
234 | if (fsdi >= 8) |
235 | ddev->target_fsc = DIGITAL_ATS_MAX_FSC; |
236 | else |
237 | ddev->target_fsc = digital_ats_fsc[fsdi]; |
238 | |
239 | ddev->curr_nfc_dep_pni = 0; |
240 | |
241 | rc = digital_target_found(ddev, target, NFC_PROTO_ISO14443); |
242 | |
243 | exit: |
244 | dev_kfree_skb(resp); |
245 | kfree(objp: target); |
246 | |
247 | if (rc) |
248 | digital_poll_next_tech(ddev); |
249 | } |
250 | |
251 | static int digital_in_send_rats(struct nfc_digital_dev *ddev, |
252 | struct nfc_target *target) |
253 | { |
254 | int rc; |
255 | struct sk_buff *skb; |
256 | |
257 | skb = digital_skb_alloc(ddev, len: 2); |
258 | if (!skb) |
259 | return -ENOMEM; |
260 | |
261 | skb_put_u8(skb, DIGITAL_RATS_BYTE1); |
262 | skb_put_u8(skb, DIGITAL_RATS_PARAM); |
263 | |
264 | rc = digital_in_send_cmd(ddev, skb, timeout: 30, cmd_cb: digital_in_recv_ats, |
265 | cb_context: target); |
266 | if (rc) |
267 | kfree_skb(skb); |
268 | |
269 | return rc; |
270 | } |
271 | |
272 | static void digital_in_recv_sel_res(struct nfc_digital_dev *ddev, void *arg, |
273 | struct sk_buff *resp) |
274 | { |
275 | struct nfc_target *target = arg; |
276 | int rc; |
277 | u8 sel_res; |
278 | u8 nfc_proto; |
279 | |
280 | if (IS_ERR(ptr: resp)) { |
281 | rc = PTR_ERR(ptr: resp); |
282 | resp = NULL; |
283 | goto exit; |
284 | } |
285 | |
286 | if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) { |
287 | rc = digital_skb_check_crc_a(skb: resp); |
288 | if (rc) { |
289 | PROTOCOL_ERR("4.4.1.3" ); |
290 | goto exit; |
291 | } |
292 | } |
293 | |
294 | if (resp->len != DIGITAL_SEL_RES_LEN) { |
295 | rc = -EIO; |
296 | goto exit; |
297 | } |
298 | |
299 | sel_res = resp->data[0]; |
300 | |
301 | if (!DIGITAL_SEL_RES_NFCID1_COMPLETE(sel_res)) { |
302 | rc = digital_in_send_sdd_req(ddev, target); |
303 | if (rc) |
304 | goto exit; |
305 | |
306 | goto exit_free_skb; |
307 | } |
308 | |
309 | target->sel_res = sel_res; |
310 | |
311 | if (DIGITAL_SEL_RES_IS_T2T(sel_res)) { |
312 | nfc_proto = NFC_PROTO_MIFARE; |
313 | } else if (DIGITAL_SEL_RES_IS_NFC_DEP(sel_res)) { |
314 | nfc_proto = NFC_PROTO_NFC_DEP; |
315 | } else if (DIGITAL_SEL_RES_IS_T4T(sel_res)) { |
316 | rc = digital_in_send_rats(ddev, target); |
317 | if (rc) |
318 | goto exit; |
319 | /* |
320 | * Skip target_found and don't free it for now. This will be |
321 | * done when receiving the ATS |
322 | */ |
323 | goto exit_free_skb; |
324 | } else { |
325 | rc = -EOPNOTSUPP; |
326 | goto exit; |
327 | } |
328 | |
329 | rc = digital_target_found(ddev, target, protocol: nfc_proto); |
330 | |
331 | exit: |
332 | kfree(objp: target); |
333 | |
334 | exit_free_skb: |
335 | dev_kfree_skb(resp); |
336 | |
337 | if (rc) |
338 | digital_poll_next_tech(ddev); |
339 | } |
340 | |
341 | static int digital_in_send_sel_req(struct nfc_digital_dev *ddev, |
342 | struct nfc_target *target, |
343 | struct digital_sdd_res *sdd_res) |
344 | { |
345 | struct sk_buff *skb; |
346 | struct digital_sel_req *sel_req; |
347 | u8 sel_cmd; |
348 | int rc; |
349 | |
350 | skb = digital_skb_alloc(ddev, len: sizeof(struct digital_sel_req)); |
351 | if (!skb) |
352 | return -ENOMEM; |
353 | |
354 | skb_put(skb, len: sizeof(struct digital_sel_req)); |
355 | sel_req = (struct digital_sel_req *)skb->data; |
356 | |
357 | if (target->nfcid1_len <= 4) |
358 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL1; |
359 | else if (target->nfcid1_len < 10) |
360 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL2; |
361 | else |
362 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL3; |
363 | |
364 | sel_req->sel_cmd = sel_cmd; |
365 | sel_req->b2 = 0x70; |
366 | memcpy(sel_req->nfcid1, sdd_res->nfcid1, 4); |
367 | sel_req->bcc = sdd_res->bcc; |
368 | |
369 | if (DIGITAL_DRV_CAPS_IN_CRC(ddev)) { |
370 | rc = digital_in_configure_hw(ddev, type: NFC_DIGITAL_CONFIG_FRAMING, |
371 | param: NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A); |
372 | if (rc) |
373 | goto exit; |
374 | } else { |
375 | digital_skb_add_crc_a(skb); |
376 | } |
377 | |
378 | rc = digital_in_send_cmd(ddev, skb, timeout: 30, cmd_cb: digital_in_recv_sel_res, |
379 | cb_context: target); |
380 | exit: |
381 | if (rc) |
382 | kfree_skb(skb); |
383 | |
384 | return rc; |
385 | } |
386 | |
387 | static void digital_in_recv_sdd_res(struct nfc_digital_dev *ddev, void *arg, |
388 | struct sk_buff *resp) |
389 | { |
390 | struct nfc_target *target = arg; |
391 | struct digital_sdd_res *sdd_res; |
392 | int rc; |
393 | u8 offset, size; |
394 | u8 i, bcc; |
395 | |
396 | if (IS_ERR(ptr: resp)) { |
397 | rc = PTR_ERR(ptr: resp); |
398 | resp = NULL; |
399 | goto exit; |
400 | } |
401 | |
402 | if (resp->len < DIGITAL_SDD_RES_LEN) { |
403 | PROTOCOL_ERR("4.7.2.8" ); |
404 | rc = -EINVAL; |
405 | goto exit; |
406 | } |
407 | |
408 | sdd_res = (struct digital_sdd_res *)resp->data; |
409 | |
410 | for (i = 0, bcc = 0; i < 4; i++) |
411 | bcc ^= sdd_res->nfcid1[i]; |
412 | |
413 | if (bcc != sdd_res->bcc) { |
414 | PROTOCOL_ERR("4.7.2.6" ); |
415 | rc = -EINVAL; |
416 | goto exit; |
417 | } |
418 | |
419 | if (sdd_res->nfcid1[0] == DIGITAL_SDD_RES_CT) { |
420 | offset = 1; |
421 | size = 3; |
422 | } else { |
423 | offset = 0; |
424 | size = 4; |
425 | } |
426 | |
427 | memcpy(target->nfcid1 + target->nfcid1_len, sdd_res->nfcid1 + offset, |
428 | size); |
429 | target->nfcid1_len += size; |
430 | |
431 | rc = digital_in_send_sel_req(ddev, target, sdd_res); |
432 | |
433 | exit: |
434 | dev_kfree_skb(resp); |
435 | |
436 | if (rc) { |
437 | kfree(objp: target); |
438 | digital_poll_next_tech(ddev); |
439 | } |
440 | } |
441 | |
442 | static int digital_in_send_sdd_req(struct nfc_digital_dev *ddev, |
443 | struct nfc_target *target) |
444 | { |
445 | int rc; |
446 | struct sk_buff *skb; |
447 | u8 sel_cmd; |
448 | |
449 | rc = digital_in_configure_hw(ddev, type: NFC_DIGITAL_CONFIG_FRAMING, |
450 | param: NFC_DIGITAL_FRAMING_NFCA_STANDARD); |
451 | if (rc) |
452 | return rc; |
453 | |
454 | skb = digital_skb_alloc(ddev, len: 2); |
455 | if (!skb) |
456 | return -ENOMEM; |
457 | |
458 | if (target->nfcid1_len == 0) |
459 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL1; |
460 | else if (target->nfcid1_len == 3) |
461 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL2; |
462 | else |
463 | sel_cmd = DIGITAL_CMD_SEL_REQ_CL3; |
464 | |
465 | skb_put_u8(skb, val: sel_cmd); |
466 | skb_put_u8(skb, DIGITAL_SDD_REQ_SEL_PAR); |
467 | |
468 | rc = digital_in_send_cmd(ddev, skb, timeout: 30, cmd_cb: digital_in_recv_sdd_res, |
469 | cb_context: target); |
470 | if (rc) |
471 | kfree_skb(skb); |
472 | |
473 | return rc; |
474 | } |
475 | |
476 | static void digital_in_recv_sens_res(struct nfc_digital_dev *ddev, void *arg, |
477 | struct sk_buff *resp) |
478 | { |
479 | struct nfc_target *target = NULL; |
480 | int rc; |
481 | |
482 | if (IS_ERR(ptr: resp)) { |
483 | rc = PTR_ERR(ptr: resp); |
484 | resp = NULL; |
485 | goto exit; |
486 | } |
487 | |
488 | if (resp->len < sizeof(u16)) { |
489 | rc = -EIO; |
490 | goto exit; |
491 | } |
492 | |
493 | target = kzalloc(size: sizeof(struct nfc_target), GFP_KERNEL); |
494 | if (!target) { |
495 | rc = -ENOMEM; |
496 | goto exit; |
497 | } |
498 | |
499 | target->sens_res = __le16_to_cpu(*(__le16 *)resp->data); |
500 | |
501 | if (!DIGITAL_SENS_RES_IS_VALID(target->sens_res)) { |
502 | PROTOCOL_ERR("4.6.3.3" ); |
503 | rc = -EINVAL; |
504 | goto exit; |
505 | } |
506 | |
507 | if (DIGITAL_SENS_RES_IS_T1T(target->sens_res)) |
508 | rc = digital_target_found(ddev, target, NFC_PROTO_JEWEL); |
509 | else |
510 | rc = digital_in_send_sdd_req(ddev, target); |
511 | |
512 | exit: |
513 | dev_kfree_skb(resp); |
514 | |
515 | if (rc) { |
516 | kfree(objp: target); |
517 | digital_poll_next_tech(ddev); |
518 | } |
519 | } |
520 | |
521 | int digital_in_send_sens_req(struct nfc_digital_dev *ddev, u8 rf_tech) |
522 | { |
523 | struct sk_buff *skb; |
524 | int rc; |
525 | |
526 | rc = digital_in_configure_hw(ddev, type: NFC_DIGITAL_CONFIG_RF_TECH, |
527 | param: NFC_DIGITAL_RF_TECH_106A); |
528 | if (rc) |
529 | return rc; |
530 | |
531 | rc = digital_in_configure_hw(ddev, type: NFC_DIGITAL_CONFIG_FRAMING, |
532 | param: NFC_DIGITAL_FRAMING_NFCA_SHORT); |
533 | if (rc) |
534 | return rc; |
535 | |
536 | skb = digital_skb_alloc(ddev, len: 1); |
537 | if (!skb) |
538 | return -ENOMEM; |
539 | |
540 | skb_put_u8(skb, DIGITAL_CMD_SENS_REQ); |
541 | |
542 | rc = digital_in_send_cmd(ddev, skb, timeout: 30, cmd_cb: digital_in_recv_sens_res, NULL); |
543 | if (rc) |
544 | kfree_skb(skb); |
545 | |
546 | return rc; |
547 | } |
548 | |
549 | int digital_in_recv_mifare_res(struct sk_buff *resp) |
550 | { |
551 | /* Successful READ command response is 16 data bytes + 2 CRC bytes long. |
552 | * Since the driver can't differentiate a ACK/NACK response from a valid |
553 | * READ response, the CRC calculation must be handled at digital level |
554 | * even if the driver supports it for this technology. |
555 | */ |
556 | if (resp->len == DIGITAL_MIFARE_READ_RES_LEN + DIGITAL_CRC_LEN) { |
557 | if (digital_skb_check_crc_a(skb: resp)) { |
558 | PROTOCOL_ERR("9.4.1.2" ); |
559 | return -EIO; |
560 | } |
561 | |
562 | return 0; |
563 | } |
564 | |
565 | /* ACK response (i.e. successful WRITE). */ |
566 | if (resp->len == 1 && resp->data[0] == DIGITAL_MIFARE_ACK_RES) { |
567 | resp->data[0] = 0; |
568 | return 0; |
569 | } |
570 | |
571 | /* NACK and any other responses are treated as error. */ |
572 | return -EIO; |
573 | } |
574 | |
575 | static void digital_in_recv_attrib_res(struct nfc_digital_dev *ddev, void *arg, |
576 | struct sk_buff *resp) |
577 | { |
578 | struct nfc_target *target = arg; |
579 | struct digital_attrib_res *attrib_res; |
580 | int rc; |
581 | |
582 | if (IS_ERR(ptr: resp)) { |
583 | rc = PTR_ERR(ptr: resp); |
584 | resp = NULL; |
585 | goto exit; |
586 | } |
587 | |
588 | if (resp->len < sizeof(*attrib_res)) { |
589 | PROTOCOL_ERR("12.6.2" ); |
590 | rc = -EIO; |
591 | goto exit; |
592 | } |
593 | |
594 | attrib_res = (struct digital_attrib_res *)resp->data; |
595 | |
596 | if (attrib_res->mbli_did & 0x0f) { |
597 | PROTOCOL_ERR("12.6.2.1" ); |
598 | rc = -EIO; |
599 | goto exit; |
600 | } |
601 | |
602 | rc = digital_target_found(ddev, target, NFC_PROTO_ISO14443_B); |
603 | |
604 | exit: |
605 | dev_kfree_skb(resp); |
606 | kfree(objp: target); |
607 | |
608 | if (rc) |
609 | digital_poll_next_tech(ddev); |
610 | } |
611 | |
612 | static int digital_in_send_attrib_req(struct nfc_digital_dev *ddev, |
613 | struct nfc_target *target, |
614 | struct digital_sensb_res *sensb_res) |
615 | { |
616 | struct digital_attrib_req *attrib_req; |
617 | struct sk_buff *skb; |
618 | int rc; |
619 | |
620 | skb = digital_skb_alloc(ddev, len: sizeof(*attrib_req)); |
621 | if (!skb) |
622 | return -ENOMEM; |
623 | |
624 | attrib_req = skb_put(skb, len: sizeof(*attrib_req)); |
625 | |
626 | attrib_req->cmd = DIGITAL_CMD_ATTRIB_REQ; |
627 | memcpy(attrib_req->nfcid0, sensb_res->nfcid0, |
628 | sizeof(attrib_req->nfcid0)); |
629 | attrib_req->param1 = DIGITAL_ATTRIB_P1_TR0_DEFAULT | |
630 | DIGITAL_ATTRIB_P1_TR1_DEFAULT; |
631 | attrib_req->param2 = DIGITAL_ATTRIB_P2_LISTEN_POLL_1 | |
632 | DIGITAL_ATTRIB_P2_POLL_LISTEN_1 | |
633 | DIGITAL_ATTRIB_P2_MAX_FRAME_256; |
634 | attrib_req->param3 = sensb_res->proto_info[1] & 0x07; |
635 | attrib_req->param4 = DIGITAL_ATTRIB_P4_DID(0); |
636 | |
637 | rc = digital_in_send_cmd(ddev, skb, timeout: 30, cmd_cb: digital_in_recv_attrib_res, |
638 | cb_context: target); |
639 | if (rc) |
640 | kfree_skb(skb); |
641 | |
642 | return rc; |
643 | } |
644 | |
645 | static void digital_in_recv_sensb_res(struct nfc_digital_dev *ddev, void *arg, |
646 | struct sk_buff *resp) |
647 | { |
648 | struct nfc_target *target = NULL; |
649 | struct digital_sensb_res *sensb_res; |
650 | u8 fsci; |
651 | int rc; |
652 | |
653 | if (IS_ERR(ptr: resp)) { |
654 | rc = PTR_ERR(ptr: resp); |
655 | resp = NULL; |
656 | goto exit; |
657 | } |
658 | |
659 | if (resp->len != sizeof(*sensb_res)) { |
660 | PROTOCOL_ERR("5.6.2.1" ); |
661 | rc = -EIO; |
662 | goto exit; |
663 | } |
664 | |
665 | sensb_res = (struct digital_sensb_res *)resp->data; |
666 | |
667 | if (sensb_res->cmd != DIGITAL_CMD_SENSB_RES) { |
668 | PROTOCOL_ERR("5.6.2" ); |
669 | rc = -EIO; |
670 | goto exit; |
671 | } |
672 | |
673 | if (!(sensb_res->proto_info[1] & BIT(0))) { |
674 | PROTOCOL_ERR("5.6.2.12" ); |
675 | rc = -EIO; |
676 | goto exit; |
677 | } |
678 | |
679 | if (sensb_res->proto_info[1] & BIT(3)) { |
680 | PROTOCOL_ERR("5.6.2.16" ); |
681 | rc = -EIO; |
682 | goto exit; |
683 | } |
684 | |
685 | fsci = DIGITAL_SENSB_FSCI(sensb_res->proto_info[1]); |
686 | if (fsci >= 8) |
687 | ddev->target_fsc = DIGITAL_ATS_MAX_FSC; |
688 | else |
689 | ddev->target_fsc = digital_ats_fsc[fsci]; |
690 | |
691 | target = kzalloc(size: sizeof(struct nfc_target), GFP_KERNEL); |
692 | if (!target) { |
693 | rc = -ENOMEM; |
694 | goto exit; |
695 | } |
696 | |
697 | rc = digital_in_send_attrib_req(ddev, target, sensb_res); |
698 | |
699 | exit: |
700 | dev_kfree_skb(resp); |
701 | |
702 | if (rc) { |
703 | kfree(objp: target); |
704 | digital_poll_next_tech(ddev); |
705 | } |
706 | } |
707 | |
708 | int digital_in_send_sensb_req(struct nfc_digital_dev *ddev, u8 rf_tech) |
709 | { |
710 | struct digital_sensb_req *sensb_req; |
711 | struct sk_buff *skb; |
712 | int rc; |
713 | |
714 | rc = digital_in_configure_hw(ddev, type: NFC_DIGITAL_CONFIG_RF_TECH, |
715 | param: NFC_DIGITAL_RF_TECH_106B); |
716 | if (rc) |
717 | return rc; |
718 | |
719 | rc = digital_in_configure_hw(ddev, type: NFC_DIGITAL_CONFIG_FRAMING, |
720 | param: NFC_DIGITAL_FRAMING_NFCB); |
721 | if (rc) |
722 | return rc; |
723 | |
724 | skb = digital_skb_alloc(ddev, len: sizeof(*sensb_req)); |
725 | if (!skb) |
726 | return -ENOMEM; |
727 | |
728 | sensb_req = skb_put(skb, len: sizeof(*sensb_req)); |
729 | |
730 | sensb_req->cmd = DIGITAL_CMD_SENSB_REQ; |
731 | sensb_req->afi = 0x00; /* All families and sub-families */ |
732 | sensb_req->param = DIGITAL_SENSB_N(0); |
733 | |
734 | rc = digital_in_send_cmd(ddev, skb, timeout: 30, cmd_cb: digital_in_recv_sensb_res, |
735 | NULL); |
736 | if (rc) |
737 | kfree_skb(skb); |
738 | |
739 | return rc; |
740 | } |
741 | |
742 | static void digital_in_recv_sensf_res(struct nfc_digital_dev *ddev, void *arg, |
743 | struct sk_buff *resp) |
744 | { |
745 | int rc; |
746 | u8 proto; |
747 | struct nfc_target target; |
748 | struct digital_sensf_res *sensf_res; |
749 | |
750 | if (IS_ERR(ptr: resp)) { |
751 | rc = PTR_ERR(ptr: resp); |
752 | resp = NULL; |
753 | goto exit; |
754 | } |
755 | |
756 | if (resp->len < DIGITAL_SENSF_RES_MIN_LENGTH) { |
757 | rc = -EIO; |
758 | goto exit; |
759 | } |
760 | |
761 | if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) { |
762 | rc = digital_skb_check_crc_f(skb: resp); |
763 | if (rc) { |
764 | PROTOCOL_ERR("6.4.1.8" ); |
765 | goto exit; |
766 | } |
767 | } |
768 | |
769 | skb_pull(skb: resp, len: 1); |
770 | |
771 | memset(&target, 0, sizeof(struct nfc_target)); |
772 | |
773 | sensf_res = (struct digital_sensf_res *)resp->data; |
774 | |
775 | memcpy(target.sensf_res, sensf_res, resp->len); |
776 | target.sensf_res_len = resp->len; |
777 | |
778 | memcpy(target.nfcid2, sensf_res->nfcid2, NFC_NFCID2_MAXSIZE); |
779 | target.nfcid2_len = NFC_NFCID2_MAXSIZE; |
780 | |
781 | if (target.nfcid2[0] == DIGITAL_SENSF_NFCID2_NFC_DEP_B1 && |
782 | target.nfcid2[1] == DIGITAL_SENSF_NFCID2_NFC_DEP_B2) |
783 | proto = NFC_PROTO_NFC_DEP; |
784 | else |
785 | proto = NFC_PROTO_FELICA; |
786 | |
787 | rc = digital_target_found(ddev, target: &target, protocol: proto); |
788 | |
789 | exit: |
790 | dev_kfree_skb(resp); |
791 | |
792 | if (rc) |
793 | digital_poll_next_tech(ddev); |
794 | } |
795 | |
796 | int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech) |
797 | { |
798 | struct digital_sensf_req *sensf_req; |
799 | struct sk_buff *skb; |
800 | int rc; |
801 | u8 size; |
802 | |
803 | rc = digital_in_configure_hw(ddev, type: NFC_DIGITAL_CONFIG_RF_TECH, param: rf_tech); |
804 | if (rc) |
805 | return rc; |
806 | |
807 | rc = digital_in_configure_hw(ddev, type: NFC_DIGITAL_CONFIG_FRAMING, |
808 | param: NFC_DIGITAL_FRAMING_NFCF); |
809 | if (rc) |
810 | return rc; |
811 | |
812 | size = sizeof(struct digital_sensf_req); |
813 | |
814 | skb = digital_skb_alloc(ddev, len: size); |
815 | if (!skb) |
816 | return -ENOMEM; |
817 | |
818 | skb_put(skb, len: size); |
819 | |
820 | sensf_req = (struct digital_sensf_req *)skb->data; |
821 | sensf_req->cmd = DIGITAL_CMD_SENSF_REQ; |
822 | sensf_req->sc1 = 0xFF; |
823 | sensf_req->sc2 = 0xFF; |
824 | sensf_req->rc = 0; |
825 | sensf_req->tsn = 0; |
826 | |
827 | *(u8 *)skb_push(skb, len: 1) = size + 1; |
828 | |
829 | if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) |
830 | digital_skb_add_crc_f(skb); |
831 | |
832 | rc = digital_in_send_cmd(ddev, skb, timeout: 30, cmd_cb: digital_in_recv_sensf_res, |
833 | NULL); |
834 | if (rc) |
835 | kfree_skb(skb); |
836 | |
837 | return rc; |
838 | } |
839 | |
840 | static void digital_in_recv_iso15693_inv_res(struct nfc_digital_dev *ddev, |
841 | void *arg, struct sk_buff *resp) |
842 | { |
843 | struct digital_iso15693_inv_res *res; |
844 | struct nfc_target *target = NULL; |
845 | int rc; |
846 | |
847 | if (IS_ERR(ptr: resp)) { |
848 | rc = PTR_ERR(ptr: resp); |
849 | resp = NULL; |
850 | goto out_free_skb; |
851 | } |
852 | |
853 | if (resp->len != sizeof(*res)) { |
854 | rc = -EIO; |
855 | goto out_free_skb; |
856 | } |
857 | |
858 | res = (struct digital_iso15693_inv_res *)resp->data; |
859 | |
860 | if (!DIGITAL_ISO15693_RES_IS_VALID(res->flags)) { |
861 | PROTOCOL_ERR("ISO15693 - 10.3.1" ); |
862 | rc = -EINVAL; |
863 | goto out_free_skb; |
864 | } |
865 | |
866 | target = kzalloc(size: sizeof(*target), GFP_KERNEL); |
867 | if (!target) { |
868 | rc = -ENOMEM; |
869 | goto out_free_skb; |
870 | } |
871 | |
872 | target->is_iso15693 = 1; |
873 | target->iso15693_dsfid = res->dsfid; |
874 | memcpy(target->iso15693_uid, &res->uid, sizeof(target->iso15693_uid)); |
875 | |
876 | rc = digital_target_found(ddev, target, NFC_PROTO_ISO15693); |
877 | |
878 | kfree(objp: target); |
879 | |
880 | out_free_skb: |
881 | dev_kfree_skb(resp); |
882 | |
883 | if (rc) |
884 | digital_poll_next_tech(ddev); |
885 | } |
886 | |
887 | int digital_in_send_iso15693_inv_req(struct nfc_digital_dev *ddev, u8 rf_tech) |
888 | { |
889 | struct digital_iso15693_inv_req *req; |
890 | struct sk_buff *skb; |
891 | int rc; |
892 | |
893 | rc = digital_in_configure_hw(ddev, type: NFC_DIGITAL_CONFIG_RF_TECH, |
894 | param: NFC_DIGITAL_RF_TECH_ISO15693); |
895 | if (rc) |
896 | return rc; |
897 | |
898 | rc = digital_in_configure_hw(ddev, type: NFC_DIGITAL_CONFIG_FRAMING, |
899 | param: NFC_DIGITAL_FRAMING_ISO15693_INVENTORY); |
900 | if (rc) |
901 | return rc; |
902 | |
903 | skb = digital_skb_alloc(ddev, len: sizeof(*req)); |
904 | if (!skb) |
905 | return -ENOMEM; |
906 | |
907 | skb_put(skb, len: sizeof(*req) - sizeof(req->mask)); /* No mask */ |
908 | req = (struct digital_iso15693_inv_req *)skb->data; |
909 | |
910 | /* Single sub-carrier, high data rate, no AFI, single slot |
911 | * Inventory command |
912 | */ |
913 | req->flags = DIGITAL_ISO15693_REQ_FLAG_DATA_RATE | |
914 | DIGITAL_ISO15693_REQ_FLAG_INVENTORY | |
915 | DIGITAL_ISO15693_REQ_FLAG_NB_SLOTS; |
916 | req->cmd = DIGITAL_CMD_ISO15693_INVENTORY_REQ; |
917 | req->mask_len = 0; |
918 | |
919 | rc = digital_in_send_cmd(ddev, skb, timeout: 30, |
920 | cmd_cb: digital_in_recv_iso15693_inv_res, NULL); |
921 | if (rc) |
922 | kfree_skb(skb); |
923 | |
924 | return rc; |
925 | } |
926 | |
927 | static int digital_tg_send_sel_res(struct nfc_digital_dev *ddev) |
928 | { |
929 | struct sk_buff *skb; |
930 | int rc; |
931 | |
932 | skb = digital_skb_alloc(ddev, len: 1); |
933 | if (!skb) |
934 | return -ENOMEM; |
935 | |
936 | skb_put_u8(skb, DIGITAL_SEL_RES_NFC_DEP); |
937 | |
938 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) |
939 | digital_skb_add_crc_a(skb); |
940 | |
941 | rc = digital_tg_configure_hw(ddev, type: NFC_DIGITAL_CONFIG_FRAMING, |
942 | param: NFC_DIGITAL_FRAMING_NFCA_ANTICOL_COMPLETE); |
943 | if (rc) { |
944 | kfree_skb(skb); |
945 | return rc; |
946 | } |
947 | |
948 | rc = digital_tg_send_cmd(ddev, skb, timeout: 300, cmd_cb: digital_tg_recv_atr_req, |
949 | NULL); |
950 | if (rc) |
951 | kfree_skb(skb); |
952 | |
953 | return rc; |
954 | } |
955 | |
956 | static void digital_tg_recv_sel_req(struct nfc_digital_dev *ddev, void *arg, |
957 | struct sk_buff *resp) |
958 | { |
959 | int rc; |
960 | |
961 | if (IS_ERR(ptr: resp)) { |
962 | rc = PTR_ERR(ptr: resp); |
963 | resp = NULL; |
964 | goto exit; |
965 | } |
966 | |
967 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) { |
968 | rc = digital_skb_check_crc_a(skb: resp); |
969 | if (rc) { |
970 | PROTOCOL_ERR("4.4.1.3" ); |
971 | goto exit; |
972 | } |
973 | } |
974 | |
975 | /* Silently ignore SEL_REQ content and send a SEL_RES for NFC-DEP */ |
976 | |
977 | rc = digital_tg_send_sel_res(ddev); |
978 | |
979 | exit: |
980 | if (rc) |
981 | digital_poll_next_tech(ddev); |
982 | |
983 | dev_kfree_skb(resp); |
984 | } |
985 | |
986 | static int digital_tg_send_sdd_res(struct nfc_digital_dev *ddev) |
987 | { |
988 | struct sk_buff *skb; |
989 | struct digital_sdd_res *sdd_res; |
990 | int rc, i; |
991 | |
992 | skb = digital_skb_alloc(ddev, len: sizeof(struct digital_sdd_res)); |
993 | if (!skb) |
994 | return -ENOMEM; |
995 | |
996 | skb_put(skb, len: sizeof(struct digital_sdd_res)); |
997 | sdd_res = (struct digital_sdd_res *)skb->data; |
998 | |
999 | sdd_res->nfcid1[0] = 0x08; |
1000 | get_random_bytes(buf: sdd_res->nfcid1 + 1, len: 3); |
1001 | |
1002 | sdd_res->bcc = 0; |
1003 | for (i = 0; i < 4; i++) |
1004 | sdd_res->bcc ^= sdd_res->nfcid1[i]; |
1005 | |
1006 | rc = digital_tg_configure_hw(ddev, type: NFC_DIGITAL_CONFIG_FRAMING, |
1007 | param: NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A); |
1008 | if (rc) { |
1009 | kfree_skb(skb); |
1010 | return rc; |
1011 | } |
1012 | |
1013 | rc = digital_tg_send_cmd(ddev, skb, timeout: 300, cmd_cb: digital_tg_recv_sel_req, |
1014 | NULL); |
1015 | if (rc) |
1016 | kfree_skb(skb); |
1017 | |
1018 | return rc; |
1019 | } |
1020 | |
1021 | static void digital_tg_recv_sdd_req(struct nfc_digital_dev *ddev, void *arg, |
1022 | struct sk_buff *resp) |
1023 | { |
1024 | u8 *sdd_req; |
1025 | int rc; |
1026 | |
1027 | if (IS_ERR(ptr: resp)) { |
1028 | rc = PTR_ERR(ptr: resp); |
1029 | resp = NULL; |
1030 | goto exit; |
1031 | } |
1032 | |
1033 | sdd_req = resp->data; |
1034 | |
1035 | if (resp->len < 2 || sdd_req[0] != DIGITAL_CMD_SEL_REQ_CL1 || |
1036 | sdd_req[1] != DIGITAL_SDD_REQ_SEL_PAR) { |
1037 | rc = -EINVAL; |
1038 | goto exit; |
1039 | } |
1040 | |
1041 | rc = digital_tg_send_sdd_res(ddev); |
1042 | |
1043 | exit: |
1044 | if (rc) |
1045 | digital_poll_next_tech(ddev); |
1046 | |
1047 | dev_kfree_skb(resp); |
1048 | } |
1049 | |
1050 | static int digital_tg_send_sens_res(struct nfc_digital_dev *ddev) |
1051 | { |
1052 | struct sk_buff *skb; |
1053 | u8 *sens_res; |
1054 | int rc; |
1055 | |
1056 | skb = digital_skb_alloc(ddev, len: 2); |
1057 | if (!skb) |
1058 | return -ENOMEM; |
1059 | |
1060 | sens_res = skb_put(skb, len: 2); |
1061 | |
1062 | sens_res[0] = (DIGITAL_SENS_RES_NFC_DEP >> 8) & 0xFF; |
1063 | sens_res[1] = DIGITAL_SENS_RES_NFC_DEP & 0xFF; |
1064 | |
1065 | rc = digital_tg_configure_hw(ddev, type: NFC_DIGITAL_CONFIG_FRAMING, |
1066 | param: NFC_DIGITAL_FRAMING_NFCA_STANDARD); |
1067 | if (rc) { |
1068 | kfree_skb(skb); |
1069 | return rc; |
1070 | } |
1071 | |
1072 | rc = digital_tg_send_cmd(ddev, skb, timeout: 300, cmd_cb: digital_tg_recv_sdd_req, |
1073 | NULL); |
1074 | if (rc) |
1075 | kfree_skb(skb); |
1076 | |
1077 | return rc; |
1078 | } |
1079 | |
1080 | void digital_tg_recv_sens_req(struct nfc_digital_dev *ddev, void *arg, |
1081 | struct sk_buff *resp) |
1082 | { |
1083 | u8 sens_req; |
1084 | int rc; |
1085 | |
1086 | if (IS_ERR(ptr: resp)) { |
1087 | rc = PTR_ERR(ptr: resp); |
1088 | resp = NULL; |
1089 | goto exit; |
1090 | } |
1091 | |
1092 | sens_req = resp->data[0]; |
1093 | |
1094 | if (!resp->len || (sens_req != DIGITAL_CMD_SENS_REQ && |
1095 | sens_req != DIGITAL_CMD_ALL_REQ)) { |
1096 | rc = -EINVAL; |
1097 | goto exit; |
1098 | } |
1099 | |
1100 | rc = digital_tg_send_sens_res(ddev); |
1101 | |
1102 | exit: |
1103 | if (rc) |
1104 | digital_poll_next_tech(ddev); |
1105 | |
1106 | dev_kfree_skb(resp); |
1107 | } |
1108 | |
1109 | static void digital_tg_recv_atr_or_sensf_req(struct nfc_digital_dev *ddev, |
1110 | void *arg, struct sk_buff *resp) |
1111 | { |
1112 | if (!IS_ERR(ptr: resp) && (resp->len >= 2) && |
1113 | (resp->data[1] == DIGITAL_CMD_SENSF_REQ)) |
1114 | digital_tg_recv_sensf_req(ddev, arg, resp); |
1115 | else |
1116 | digital_tg_recv_atr_req(ddev, arg, resp); |
1117 | |
1118 | return; |
1119 | } |
1120 | |
1121 | static int digital_tg_send_sensf_res(struct nfc_digital_dev *ddev, |
1122 | struct digital_sensf_req *sensf_req) |
1123 | { |
1124 | struct sk_buff *skb; |
1125 | u8 size; |
1126 | int rc; |
1127 | struct digital_sensf_res *sensf_res; |
1128 | |
1129 | size = sizeof(struct digital_sensf_res); |
1130 | |
1131 | if (sensf_req->rc == DIGITAL_SENSF_REQ_RC_NONE) |
1132 | size -= sizeof(sensf_res->rd); |
1133 | |
1134 | skb = digital_skb_alloc(ddev, len: size); |
1135 | if (!skb) |
1136 | return -ENOMEM; |
1137 | |
1138 | skb_put(skb, len: size); |
1139 | |
1140 | sensf_res = (struct digital_sensf_res *)skb->data; |
1141 | |
1142 | memset(sensf_res, 0, size); |
1143 | |
1144 | sensf_res->cmd = DIGITAL_CMD_SENSF_RES; |
1145 | sensf_res->nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1; |
1146 | sensf_res->nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2; |
1147 | get_random_bytes(buf: &sensf_res->nfcid2[2], len: 6); |
1148 | |
1149 | switch (sensf_req->rc) { |
1150 | case DIGITAL_SENSF_REQ_RC_SC: |
1151 | sensf_res->rd[0] = sensf_req->sc1; |
1152 | sensf_res->rd[1] = sensf_req->sc2; |
1153 | break; |
1154 | case DIGITAL_SENSF_REQ_RC_AP: |
1155 | sensf_res->rd[0] = DIGITAL_SENSF_RES_RD_AP_B1; |
1156 | sensf_res->rd[1] = DIGITAL_SENSF_RES_RD_AP_B2; |
1157 | break; |
1158 | } |
1159 | |
1160 | *(u8 *)skb_push(skb, len: sizeof(u8)) = size + 1; |
1161 | |
1162 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) |
1163 | digital_skb_add_crc_f(skb); |
1164 | |
1165 | rc = digital_tg_send_cmd(ddev, skb, timeout: 300, |
1166 | cmd_cb: digital_tg_recv_atr_or_sensf_req, NULL); |
1167 | if (rc) |
1168 | kfree_skb(skb); |
1169 | |
1170 | return rc; |
1171 | } |
1172 | |
1173 | void digital_tg_recv_sensf_req(struct nfc_digital_dev *ddev, void *arg, |
1174 | struct sk_buff *resp) |
1175 | { |
1176 | struct digital_sensf_req *sensf_req; |
1177 | int rc; |
1178 | |
1179 | if (IS_ERR(ptr: resp)) { |
1180 | rc = PTR_ERR(ptr: resp); |
1181 | resp = NULL; |
1182 | goto exit; |
1183 | } |
1184 | |
1185 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) { |
1186 | rc = digital_skb_check_crc_f(skb: resp); |
1187 | if (rc) { |
1188 | PROTOCOL_ERR("6.4.1.8" ); |
1189 | goto exit; |
1190 | } |
1191 | } |
1192 | |
1193 | if (resp->len != sizeof(struct digital_sensf_req) + 1) { |
1194 | rc = -EINVAL; |
1195 | goto exit; |
1196 | } |
1197 | |
1198 | skb_pull(skb: resp, len: 1); |
1199 | sensf_req = (struct digital_sensf_req *)resp->data; |
1200 | |
1201 | if (sensf_req->cmd != DIGITAL_CMD_SENSF_REQ) { |
1202 | rc = -EINVAL; |
1203 | goto exit; |
1204 | } |
1205 | |
1206 | rc = digital_tg_send_sensf_res(ddev, sensf_req); |
1207 | |
1208 | exit: |
1209 | if (rc) |
1210 | digital_poll_next_tech(ddev); |
1211 | |
1212 | dev_kfree_skb(resp); |
1213 | } |
1214 | |
1215 | static int digital_tg_config_nfca(struct nfc_digital_dev *ddev) |
1216 | { |
1217 | int rc; |
1218 | |
1219 | rc = digital_tg_configure_hw(ddev, type: NFC_DIGITAL_CONFIG_RF_TECH, |
1220 | param: NFC_DIGITAL_RF_TECH_106A); |
1221 | if (rc) |
1222 | return rc; |
1223 | |
1224 | return digital_tg_configure_hw(ddev, type: NFC_DIGITAL_CONFIG_FRAMING, |
1225 | param: NFC_DIGITAL_FRAMING_NFCA_NFC_DEP); |
1226 | } |
1227 | |
1228 | int digital_tg_listen_nfca(struct nfc_digital_dev *ddev, u8 rf_tech) |
1229 | { |
1230 | int rc; |
1231 | |
1232 | rc = digital_tg_config_nfca(ddev); |
1233 | if (rc) |
1234 | return rc; |
1235 | |
1236 | return digital_tg_listen(ddev, timeout: 300, cb: digital_tg_recv_sens_req, NULL); |
1237 | } |
1238 | |
1239 | static int digital_tg_config_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech) |
1240 | { |
1241 | int rc; |
1242 | |
1243 | rc = digital_tg_configure_hw(ddev, type: NFC_DIGITAL_CONFIG_RF_TECH, param: rf_tech); |
1244 | if (rc) |
1245 | return rc; |
1246 | |
1247 | return digital_tg_configure_hw(ddev, type: NFC_DIGITAL_CONFIG_FRAMING, |
1248 | param: NFC_DIGITAL_FRAMING_NFCF_NFC_DEP); |
1249 | } |
1250 | |
1251 | int digital_tg_listen_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech) |
1252 | { |
1253 | int rc; |
1254 | |
1255 | rc = digital_tg_config_nfcf(ddev, rf_tech); |
1256 | if (rc) |
1257 | return rc; |
1258 | |
1259 | return digital_tg_listen(ddev, timeout: 300, cb: digital_tg_recv_sensf_req, NULL); |
1260 | } |
1261 | |
1262 | void digital_tg_recv_md_req(struct nfc_digital_dev *ddev, void *arg, |
1263 | struct sk_buff *resp) |
1264 | { |
1265 | u8 rf_tech; |
1266 | int rc; |
1267 | |
1268 | if (IS_ERR(ptr: resp)) { |
1269 | resp = NULL; |
1270 | goto exit_free_skb; |
1271 | } |
1272 | |
1273 | rc = ddev->ops->tg_get_rf_tech(ddev, &rf_tech); |
1274 | if (rc) |
1275 | goto exit_free_skb; |
1276 | |
1277 | switch (rf_tech) { |
1278 | case NFC_DIGITAL_RF_TECH_106A: |
1279 | rc = digital_tg_config_nfca(ddev); |
1280 | if (rc) |
1281 | goto exit_free_skb; |
1282 | digital_tg_recv_sens_req(ddev, arg, resp); |
1283 | break; |
1284 | case NFC_DIGITAL_RF_TECH_212F: |
1285 | case NFC_DIGITAL_RF_TECH_424F: |
1286 | rc = digital_tg_config_nfcf(ddev, rf_tech); |
1287 | if (rc) |
1288 | goto exit_free_skb; |
1289 | digital_tg_recv_sensf_req(ddev, arg, resp); |
1290 | break; |
1291 | default: |
1292 | goto exit_free_skb; |
1293 | } |
1294 | |
1295 | return; |
1296 | |
1297 | exit_free_skb: |
1298 | digital_poll_next_tech(ddev); |
1299 | dev_kfree_skb(resp); |
1300 | } |
1301 | |