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2025cf9e | 1 | // SPDX-License-Identifier: GPL-2.0-only |
59ee2361 TE |
2 | /* |
3 | * NFC Digital Protocol stack | |
4 | * Copyright (c) 2013, Intel Corporation. | |
59ee2361 TE |
5 | */ |
6 | ||
c5da0e4a SO |
7 | #define pr_fmt(fmt) "digital: %s: " fmt, __func__ |
8 | ||
59ee2361 TE |
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 | |
7f9f1713 | 21 | #define DIGITAL_SEL_RES_LEN 1 |
59ee2361 | 22 | |
2c66daec TE |
23 | #define DIGITAL_SEL_RES_NFCID1_COMPLETE(sel_res) (!((sel_res) & 0x04)) |
24 | #define DIGITAL_SEL_RES_IS_T2T(sel_res) (!((sel_res) & 0x60)) | |
12e3d241 | 25 | #define DIGITAL_SEL_RES_IS_T4T(sel_res) ((sel_res) & 0x20) |
7d0911c0 | 26 | #define DIGITAL_SEL_RES_IS_NFC_DEP(sel_res) ((sel_res) & 0x40) |
2c66daec | 27 | |
13292c9a | 28 | #define DIGITAL_SENS_RES_IS_T1T(sens_res) (((sens_res) & 0x0C00) == 0x0C00) |
2c66daec | 29 | #define DIGITAL_SENS_RES_IS_VALID(sens_res) \ |
13292c9a TE |
30 | ((!((sens_res) & 0x001F) && (((sens_res) & 0x0C00) == 0x0C00)) || \ |
31 | (((sens_res) & 0x001F) && ((sens_res) & 0x0C00) != 0x0C00)) | |
2c66daec TE |
32 | |
33 | #define DIGITAL_MIFARE_READ_RES_LEN 16 | |
34 | #define DIGITAL_MIFARE_ACK_RES 0x0A | |
35 | ||
24734607 MG |
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 | ||
8c0695e4 TE |
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 | ||
a381d482 MG |
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 | ||
c813007f TE |
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 | ||
12e3d241 TE |
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) | |
24734607 | 88 | #define DIGITAL_SENSB_FSCI(pi2) (((pi2) & 0xF0) >> 4) |
12e3d241 TE |
89 | #define DIGITAL_ATS_MAX_FSC 256 |
90 | ||
91 | #define DIGITAL_RATS_BYTE1 0xE0 | |
92 | #define DIGITAL_RATS_PARAM 0x80 | |
93 | ||
2c66daec TE |
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 | ||
24734607 MG |
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 | ||
8c0695e4 TE |
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 | ||
a381d482 MG |
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 | ||
2c66daec TE |
164 | static int digital_in_send_sdd_req(struct nfc_digital_dev *ddev, |
165 | struct nfc_target *target); | |
166 | ||
c813007f TE |
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, 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, 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 | ||
12e3d241 TE |
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(resp)) { | |
223 | rc = PTR_ERR(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(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, 2); | |
258 | if (!skb) | |
259 | return -ENOMEM; | |
260 | ||
634fef61 JB |
261 | skb_put_u8(skb, DIGITAL_RATS_BYTE1); |
262 | skb_put_u8(skb, DIGITAL_RATS_PARAM); | |
12e3d241 TE |
263 | |
264 | rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_ats, | |
265 | target); | |
266 | if (rc) | |
267 | kfree_skb(skb); | |
268 | ||
269 | return rc; | |
270 | } | |
271 | ||
2c66daec TE |
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(resp)) { | |
281 | rc = PTR_ERR(resp); | |
282 | resp = NULL; | |
283 | goto exit; | |
284 | } | |
285 | ||
286 | if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) { | |
287 | rc = digital_skb_check_crc_a(resp); | |
288 | if (rc) { | |
289 | PROTOCOL_ERR("4.4.1.3"); | |
290 | goto exit; | |
291 | } | |
292 | } | |
293 | ||
7f9f1713 | 294 | if (resp->len != DIGITAL_SEL_RES_LEN) { |
2c66daec TE |
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 | ||
12e3d241 TE |
309 | target->sel_res = sel_res; |
310 | ||
2c66daec TE |
311 | if (DIGITAL_SEL_RES_IS_T2T(sel_res)) { |
312 | nfc_proto = NFC_PROTO_MIFARE; | |
4b4dbca5 MG |
313 | } else if (DIGITAL_SEL_RES_IS_NFC_DEP(sel_res)) { |
314 | nfc_proto = NFC_PROTO_NFC_DEP; | |
12e3d241 TE |
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; | |
2c66daec TE |
324 | } else { |
325 | rc = -EOPNOTSUPP; | |
326 | goto exit; | |
327 | } | |
328 | ||
2c66daec TE |
329 | rc = digital_target_found(ddev, target, nfc_proto); |
330 | ||
331 | exit: | |
332 | kfree(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, sizeof(struct digital_sel_req)); | |
351 | if (!skb) | |
352 | return -ENOMEM; | |
353 | ||
354 | skb_put(skb, 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, NFC_DIGITAL_CONFIG_FRAMING, | |
371 | 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, 30, digital_in_recv_sel_res, | |
379 | 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(resp)) { | |
397 | rc = PTR_ERR(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(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, NFC_DIGITAL_CONFIG_FRAMING, | |
450 | NFC_DIGITAL_FRAMING_NFCA_STANDARD); | |
451 | if (rc) | |
452 | return rc; | |
453 | ||
454 | skb = digital_skb_alloc(ddev, 2); | |
26042530 | 455 | if (!skb) |
2c66daec | 456 | return -ENOMEM; |
2c66daec TE |
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 | ||
634fef61 JB |
465 | skb_put_u8(skb, sel_cmd); |
466 | skb_put_u8(skb, DIGITAL_SDD_REQ_SEL_PAR); | |
2c66daec TE |
467 | |
468 | return digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sdd_res, | |
469 | target); | |
470 | } | |
471 | ||
59ee2361 TE |
472 | static void digital_in_recv_sens_res(struct nfc_digital_dev *ddev, void *arg, |
473 | struct sk_buff *resp) | |
474 | { | |
2c66daec | 475 | struct nfc_target *target = NULL; |
2c66daec TE |
476 | int rc; |
477 | ||
478 | if (IS_ERR(resp)) { | |
479 | rc = PTR_ERR(resp); | |
480 | resp = NULL; | |
481 | goto exit; | |
482 | } | |
483 | ||
484 | if (resp->len < sizeof(u16)) { | |
485 | rc = -EIO; | |
486 | goto exit; | |
487 | } | |
488 | ||
489 | target = kzalloc(sizeof(struct nfc_target), GFP_KERNEL); | |
490 | if (!target) { | |
491 | rc = -ENOMEM; | |
492 | goto exit; | |
493 | } | |
494 | ||
13292c9a | 495 | target->sens_res = __le16_to_cpu(*(__le16 *)resp->data); |
59ee2361 | 496 | |
13292c9a | 497 | if (!DIGITAL_SENS_RES_IS_VALID(target->sens_res)) { |
2c66daec TE |
498 | PROTOCOL_ERR("4.6.3.3"); |
499 | rc = -EINVAL; | |
500 | goto exit; | |
501 | } | |
502 | ||
13292c9a | 503 | if (DIGITAL_SENS_RES_IS_T1T(target->sens_res)) |
2c66daec TE |
504 | rc = digital_target_found(ddev, target, NFC_PROTO_JEWEL); |
505 | else | |
506 | rc = digital_in_send_sdd_req(ddev, target); | |
507 | ||
508 | exit: | |
509 | dev_kfree_skb(resp); | |
510 | ||
511 | if (rc) { | |
512 | kfree(target); | |
513 | digital_poll_next_tech(ddev); | |
514 | } | |
59ee2361 TE |
515 | } |
516 | ||
517 | int digital_in_send_sens_req(struct nfc_digital_dev *ddev, u8 rf_tech) | |
518 | { | |
519 | struct sk_buff *skb; | |
520 | int rc; | |
521 | ||
522 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, | |
523 | NFC_DIGITAL_RF_TECH_106A); | |
524 | if (rc) | |
525 | return rc; | |
526 | ||
527 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, | |
528 | NFC_DIGITAL_FRAMING_NFCA_SHORT); | |
529 | if (rc) | |
530 | return rc; | |
531 | ||
532 | skb = digital_skb_alloc(ddev, 1); | |
533 | if (!skb) | |
534 | return -ENOMEM; | |
535 | ||
634fef61 | 536 | skb_put_u8(skb, DIGITAL_CMD_SENS_REQ); |
59ee2361 TE |
537 | |
538 | rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sens_res, NULL); | |
539 | if (rc) | |
540 | kfree_skb(skb); | |
541 | ||
542 | return rc; | |
543 | } | |
2c66daec TE |
544 | |
545 | int digital_in_recv_mifare_res(struct sk_buff *resp) | |
546 | { | |
547 | /* Successful READ command response is 16 data bytes + 2 CRC bytes long. | |
548 | * Since the driver can't differentiate a ACK/NACK response from a valid | |
549 | * READ response, the CRC calculation must be handled at digital level | |
550 | * even if the driver supports it for this technology. | |
551 | */ | |
552 | if (resp->len == DIGITAL_MIFARE_READ_RES_LEN + DIGITAL_CRC_LEN) { | |
553 | if (digital_skb_check_crc_a(resp)) { | |
554 | PROTOCOL_ERR("9.4.1.2"); | |
555 | return -EIO; | |
556 | } | |
557 | ||
558 | return 0; | |
559 | } | |
560 | ||
561 | /* ACK response (i.e. successful WRITE). */ | |
562 | if (resp->len == 1 && resp->data[0] == DIGITAL_MIFARE_ACK_RES) { | |
563 | resp->data[0] = 0; | |
564 | return 0; | |
565 | } | |
566 | ||
567 | /* NACK and any other responses are treated as error. */ | |
568 | return -EIO; | |
569 | } | |
8c0695e4 | 570 | |
24734607 MG |
571 | static void digital_in_recv_attrib_res(struct nfc_digital_dev *ddev, void *arg, |
572 | struct sk_buff *resp) | |
573 | { | |
574 | struct nfc_target *target = arg; | |
575 | struct digital_attrib_res *attrib_res; | |
576 | int rc; | |
577 | ||
578 | if (IS_ERR(resp)) { | |
579 | rc = PTR_ERR(resp); | |
580 | resp = NULL; | |
581 | goto exit; | |
582 | } | |
583 | ||
584 | if (resp->len < sizeof(*attrib_res)) { | |
585 | PROTOCOL_ERR("12.6.2"); | |
586 | rc = -EIO; | |
587 | goto exit; | |
588 | } | |
589 | ||
590 | attrib_res = (struct digital_attrib_res *)resp->data; | |
591 | ||
592 | if (attrib_res->mbli_did & 0x0f) { | |
593 | PROTOCOL_ERR("12.6.2.1"); | |
594 | rc = -EIO; | |
595 | goto exit; | |
596 | } | |
597 | ||
598 | rc = digital_target_found(ddev, target, NFC_PROTO_ISO14443_B); | |
599 | ||
600 | exit: | |
601 | dev_kfree_skb(resp); | |
602 | kfree(target); | |
603 | ||
604 | if (rc) | |
605 | digital_poll_next_tech(ddev); | |
606 | } | |
607 | ||
cb30caf0 | 608 | static int digital_in_send_attrib_req(struct nfc_digital_dev *ddev, |
24734607 MG |
609 | struct nfc_target *target, |
610 | struct digital_sensb_res *sensb_res) | |
611 | { | |
612 | struct digital_attrib_req *attrib_req; | |
613 | struct sk_buff *skb; | |
614 | int rc; | |
615 | ||
616 | skb = digital_skb_alloc(ddev, sizeof(*attrib_req)); | |
617 | if (!skb) | |
618 | return -ENOMEM; | |
619 | ||
4df864c1 | 620 | attrib_req = skb_put(skb, sizeof(*attrib_req)); |
24734607 MG |
621 | |
622 | attrib_req->cmd = DIGITAL_CMD_ATTRIB_REQ; | |
623 | memcpy(attrib_req->nfcid0, sensb_res->nfcid0, | |
624 | sizeof(attrib_req->nfcid0)); | |
625 | attrib_req->param1 = DIGITAL_ATTRIB_P1_TR0_DEFAULT | | |
626 | DIGITAL_ATTRIB_P1_TR1_DEFAULT; | |
627 | attrib_req->param2 = DIGITAL_ATTRIB_P2_LISTEN_POLL_1 | | |
628 | DIGITAL_ATTRIB_P2_POLL_LISTEN_1 | | |
629 | DIGITAL_ATTRIB_P2_MAX_FRAME_256; | |
630 | attrib_req->param3 = sensb_res->proto_info[1] & 0x07; | |
631 | attrib_req->param4 = DIGITAL_ATTRIB_P4_DID(0); | |
632 | ||
633 | rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_attrib_res, | |
634 | target); | |
635 | if (rc) | |
636 | kfree_skb(skb); | |
637 | ||
638 | return rc; | |
639 | } | |
640 | ||
641 | static void digital_in_recv_sensb_res(struct nfc_digital_dev *ddev, void *arg, | |
642 | struct sk_buff *resp) | |
643 | { | |
644 | struct nfc_target *target = NULL; | |
645 | struct digital_sensb_res *sensb_res; | |
646 | u8 fsci; | |
647 | int rc; | |
648 | ||
649 | if (IS_ERR(resp)) { | |
650 | rc = PTR_ERR(resp); | |
651 | resp = NULL; | |
652 | goto exit; | |
653 | } | |
654 | ||
655 | if (resp->len != sizeof(*sensb_res)) { | |
656 | PROTOCOL_ERR("5.6.2.1"); | |
657 | rc = -EIO; | |
658 | goto exit; | |
659 | } | |
660 | ||
661 | sensb_res = (struct digital_sensb_res *)resp->data; | |
662 | ||
663 | if (sensb_res->cmd != DIGITAL_CMD_SENSB_RES) { | |
664 | PROTOCOL_ERR("5.6.2"); | |
665 | rc = -EIO; | |
666 | goto exit; | |
667 | } | |
668 | ||
669 | if (!(sensb_res->proto_info[1] & BIT(0))) { | |
670 | PROTOCOL_ERR("5.6.2.12"); | |
671 | rc = -EIO; | |
672 | goto exit; | |
673 | } | |
674 | ||
675 | if (sensb_res->proto_info[1] & BIT(3)) { | |
676 | PROTOCOL_ERR("5.6.2.16"); | |
677 | rc = -EIO; | |
678 | goto exit; | |
679 | } | |
680 | ||
681 | fsci = DIGITAL_SENSB_FSCI(sensb_res->proto_info[1]); | |
682 | if (fsci >= 8) | |
683 | ddev->target_fsc = DIGITAL_ATS_MAX_FSC; | |
684 | else | |
685 | ddev->target_fsc = digital_ats_fsc[fsci]; | |
686 | ||
687 | target = kzalloc(sizeof(struct nfc_target), GFP_KERNEL); | |
688 | if (!target) { | |
689 | rc = -ENOMEM; | |
690 | goto exit; | |
691 | } | |
692 | ||
693 | rc = digital_in_send_attrib_req(ddev, target, sensb_res); | |
694 | ||
695 | exit: | |
696 | dev_kfree_skb(resp); | |
697 | ||
698 | if (rc) { | |
699 | kfree(target); | |
700 | digital_poll_next_tech(ddev); | |
701 | } | |
702 | } | |
703 | ||
704 | int digital_in_send_sensb_req(struct nfc_digital_dev *ddev, u8 rf_tech) | |
705 | { | |
706 | struct digital_sensb_req *sensb_req; | |
707 | struct sk_buff *skb; | |
708 | int rc; | |
709 | ||
710 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, | |
711 | NFC_DIGITAL_RF_TECH_106B); | |
712 | if (rc) | |
713 | return rc; | |
714 | ||
715 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, | |
716 | NFC_DIGITAL_FRAMING_NFCB); | |
717 | if (rc) | |
718 | return rc; | |
719 | ||
720 | skb = digital_skb_alloc(ddev, sizeof(*sensb_req)); | |
721 | if (!skb) | |
722 | return -ENOMEM; | |
723 | ||
4df864c1 | 724 | sensb_req = skb_put(skb, sizeof(*sensb_req)); |
24734607 MG |
725 | |
726 | sensb_req->cmd = DIGITAL_CMD_SENSB_REQ; | |
727 | sensb_req->afi = 0x00; /* All families and sub-families */ | |
728 | sensb_req->param = DIGITAL_SENSB_N(0); | |
729 | ||
730 | rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sensb_res, | |
731 | NULL); | |
732 | if (rc) | |
733 | kfree_skb(skb); | |
734 | ||
735 | return rc; | |
736 | } | |
737 | ||
8c0695e4 TE |
738 | static void digital_in_recv_sensf_res(struct nfc_digital_dev *ddev, void *arg, |
739 | struct sk_buff *resp) | |
740 | { | |
741 | int rc; | |
7d0911c0 | 742 | u8 proto; |
8c0695e4 TE |
743 | struct nfc_target target; |
744 | struct digital_sensf_res *sensf_res; | |
745 | ||
746 | if (IS_ERR(resp)) { | |
747 | rc = PTR_ERR(resp); | |
748 | resp = NULL; | |
749 | goto exit; | |
750 | } | |
751 | ||
752 | if (resp->len < DIGITAL_SENSF_RES_MIN_LENGTH) { | |
753 | rc = -EIO; | |
754 | goto exit; | |
755 | } | |
756 | ||
757 | if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) { | |
758 | rc = digital_skb_check_crc_f(resp); | |
759 | if (rc) { | |
760 | PROTOCOL_ERR("6.4.1.8"); | |
761 | goto exit; | |
762 | } | |
763 | } | |
764 | ||
765 | skb_pull(resp, 1); | |
766 | ||
767 | memset(&target, 0, sizeof(struct nfc_target)); | |
768 | ||
769 | sensf_res = (struct digital_sensf_res *)resp->data; | |
770 | ||
771 | memcpy(target.sensf_res, sensf_res, resp->len); | |
772 | target.sensf_res_len = resp->len; | |
773 | ||
774 | memcpy(target.nfcid2, sensf_res->nfcid2, NFC_NFCID2_MAXSIZE); | |
775 | target.nfcid2_len = NFC_NFCID2_MAXSIZE; | |
776 | ||
7d0911c0 TE |
777 | if (target.nfcid2[0] == DIGITAL_SENSF_NFCID2_NFC_DEP_B1 && |
778 | target.nfcid2[1] == DIGITAL_SENSF_NFCID2_NFC_DEP_B2) | |
779 | proto = NFC_PROTO_NFC_DEP; | |
780 | else | |
781 | proto = NFC_PROTO_FELICA; | |
782 | ||
783 | rc = digital_target_found(ddev, &target, proto); | |
8c0695e4 TE |
784 | |
785 | exit: | |
786 | dev_kfree_skb(resp); | |
787 | ||
788 | if (rc) | |
789 | digital_poll_next_tech(ddev); | |
790 | } | |
791 | ||
792 | int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech) | |
793 | { | |
794 | struct digital_sensf_req *sensf_req; | |
795 | struct sk_buff *skb; | |
796 | int rc; | |
797 | u8 size; | |
798 | ||
799 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech); | |
800 | if (rc) | |
801 | return rc; | |
802 | ||
803 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, | |
804 | NFC_DIGITAL_FRAMING_NFCF); | |
805 | if (rc) | |
806 | return rc; | |
807 | ||
808 | size = sizeof(struct digital_sensf_req); | |
809 | ||
810 | skb = digital_skb_alloc(ddev, size); | |
811 | if (!skb) | |
812 | return -ENOMEM; | |
813 | ||
814 | skb_put(skb, size); | |
815 | ||
816 | sensf_req = (struct digital_sensf_req *)skb->data; | |
817 | sensf_req->cmd = DIGITAL_CMD_SENSF_REQ; | |
818 | sensf_req->sc1 = 0xFF; | |
819 | sensf_req->sc2 = 0xFF; | |
820 | sensf_req->rc = 0; | |
821 | sensf_req->tsn = 0; | |
822 | ||
d58ff351 | 823 | *(u8 *)skb_push(skb, 1) = size + 1; |
8c0695e4 TE |
824 | |
825 | if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) | |
826 | digital_skb_add_crc_f(skb); | |
827 | ||
828 | rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sensf_res, | |
829 | NULL); | |
830 | if (rc) | |
831 | kfree_skb(skb); | |
832 | ||
833 | return rc; | |
834 | } | |
1c7a4c24 | 835 | |
a381d482 MG |
836 | static void digital_in_recv_iso15693_inv_res(struct nfc_digital_dev *ddev, |
837 | void *arg, struct sk_buff *resp) | |
838 | { | |
839 | struct digital_iso15693_inv_res *res; | |
840 | struct nfc_target *target = NULL; | |
841 | int rc; | |
842 | ||
843 | if (IS_ERR(resp)) { | |
844 | rc = PTR_ERR(resp); | |
845 | resp = NULL; | |
846 | goto out_free_skb; | |
847 | } | |
848 | ||
849 | if (resp->len != sizeof(*res)) { | |
850 | rc = -EIO; | |
851 | goto out_free_skb; | |
852 | } | |
853 | ||
854 | res = (struct digital_iso15693_inv_res *)resp->data; | |
855 | ||
856 | if (!DIGITAL_ISO15693_RES_IS_VALID(res->flags)) { | |
857 | PROTOCOL_ERR("ISO15693 - 10.3.1"); | |
858 | rc = -EINVAL; | |
859 | goto out_free_skb; | |
860 | } | |
861 | ||
862 | target = kzalloc(sizeof(*target), GFP_KERNEL); | |
863 | if (!target) { | |
864 | rc = -ENOMEM; | |
865 | goto out_free_skb; | |
866 | } | |
867 | ||
868 | target->is_iso15693 = 1; | |
869 | target->iso15693_dsfid = res->dsfid; | |
870 | memcpy(target->iso15693_uid, &res->uid, sizeof(target->iso15693_uid)); | |
871 | ||
872 | rc = digital_target_found(ddev, target, NFC_PROTO_ISO15693); | |
873 | ||
874 | kfree(target); | |
875 | ||
876 | out_free_skb: | |
877 | dev_kfree_skb(resp); | |
878 | ||
879 | if (rc) | |
880 | digital_poll_next_tech(ddev); | |
881 | } | |
882 | ||
883 | int digital_in_send_iso15693_inv_req(struct nfc_digital_dev *ddev, u8 rf_tech) | |
884 | { | |
885 | struct digital_iso15693_inv_req *req; | |
886 | struct sk_buff *skb; | |
887 | int rc; | |
888 | ||
889 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, | |
890 | NFC_DIGITAL_RF_TECH_ISO15693); | |
891 | if (rc) | |
892 | return rc; | |
893 | ||
894 | rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, | |
895 | NFC_DIGITAL_FRAMING_ISO15693_INVENTORY); | |
896 | if (rc) | |
897 | return rc; | |
898 | ||
899 | skb = digital_skb_alloc(ddev, sizeof(*req)); | |
900 | if (!skb) | |
901 | return -ENOMEM; | |
902 | ||
903 | skb_put(skb, sizeof(*req) - sizeof(req->mask)); /* No mask */ | |
904 | req = (struct digital_iso15693_inv_req *)skb->data; | |
905 | ||
906 | /* Single sub-carrier, high data rate, no AFI, single slot | |
907 | * Inventory command | |
908 | */ | |
909 | req->flags = DIGITAL_ISO15693_REQ_FLAG_DATA_RATE | | |
910 | DIGITAL_ISO15693_REQ_FLAG_INVENTORY | | |
911 | DIGITAL_ISO15693_REQ_FLAG_NB_SLOTS; | |
912 | req->cmd = DIGITAL_CMD_ISO15693_INVENTORY_REQ; | |
913 | req->mask_len = 0; | |
914 | ||
915 | rc = digital_in_send_cmd(ddev, skb, 30, | |
916 | digital_in_recv_iso15693_inv_res, NULL); | |
917 | if (rc) | |
918 | kfree_skb(skb); | |
919 | ||
920 | return rc; | |
921 | } | |
922 | ||
1c7a4c24 TE |
923 | static int digital_tg_send_sel_res(struct nfc_digital_dev *ddev) |
924 | { | |
925 | struct sk_buff *skb; | |
926 | int rc; | |
927 | ||
928 | skb = digital_skb_alloc(ddev, 1); | |
929 | if (!skb) | |
930 | return -ENOMEM; | |
931 | ||
634fef61 | 932 | skb_put_u8(skb, DIGITAL_SEL_RES_NFC_DEP); |
1c7a4c24 TE |
933 | |
934 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) | |
935 | digital_skb_add_crc_a(skb); | |
936 | ||
55537c7e MG |
937 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
938 | NFC_DIGITAL_FRAMING_NFCA_ANTICOL_COMPLETE); | |
939 | if (rc) { | |
940 | kfree_skb(skb); | |
941 | return rc; | |
942 | } | |
943 | ||
1c7a4c24 TE |
944 | rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_atr_req, |
945 | NULL); | |
946 | if (rc) | |
947 | kfree_skb(skb); | |
948 | ||
949 | return rc; | |
950 | } | |
951 | ||
952 | static void digital_tg_recv_sel_req(struct nfc_digital_dev *ddev, void *arg, | |
953 | struct sk_buff *resp) | |
954 | { | |
955 | int rc; | |
956 | ||
957 | if (IS_ERR(resp)) { | |
958 | rc = PTR_ERR(resp); | |
959 | resp = NULL; | |
960 | goto exit; | |
961 | } | |
962 | ||
963 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) { | |
964 | rc = digital_skb_check_crc_a(resp); | |
965 | if (rc) { | |
966 | PROTOCOL_ERR("4.4.1.3"); | |
967 | goto exit; | |
968 | } | |
969 | } | |
970 | ||
971 | /* Silently ignore SEL_REQ content and send a SEL_RES for NFC-DEP */ | |
972 | ||
973 | rc = digital_tg_send_sel_res(ddev); | |
974 | ||
975 | exit: | |
976 | if (rc) | |
977 | digital_poll_next_tech(ddev); | |
978 | ||
979 | dev_kfree_skb(resp); | |
980 | } | |
981 | ||
982 | static int digital_tg_send_sdd_res(struct nfc_digital_dev *ddev) | |
983 | { | |
984 | struct sk_buff *skb; | |
985 | struct digital_sdd_res *sdd_res; | |
986 | int rc, i; | |
987 | ||
988 | skb = digital_skb_alloc(ddev, sizeof(struct digital_sdd_res)); | |
989 | if (!skb) | |
990 | return -ENOMEM; | |
991 | ||
992 | skb_put(skb, sizeof(struct digital_sdd_res)); | |
993 | sdd_res = (struct digital_sdd_res *)skb->data; | |
994 | ||
995 | sdd_res->nfcid1[0] = 0x08; | |
996 | get_random_bytes(sdd_res->nfcid1 + 1, 3); | |
997 | ||
998 | sdd_res->bcc = 0; | |
999 | for (i = 0; i < 4; i++) | |
1000 | sdd_res->bcc ^= sdd_res->nfcid1[i]; | |
1001 | ||
55537c7e MG |
1002 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
1003 | NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A); | |
1004 | if (rc) { | |
1005 | kfree_skb(skb); | |
1006 | return rc; | |
1007 | } | |
1008 | ||
1c7a4c24 TE |
1009 | rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_sel_req, |
1010 | NULL); | |
1011 | if (rc) | |
1012 | kfree_skb(skb); | |
1013 | ||
1014 | return rc; | |
1015 | } | |
1016 | ||
1017 | static void digital_tg_recv_sdd_req(struct nfc_digital_dev *ddev, void *arg, | |
1018 | struct sk_buff *resp) | |
1019 | { | |
1020 | u8 *sdd_req; | |
1021 | int rc; | |
1022 | ||
1023 | if (IS_ERR(resp)) { | |
1024 | rc = PTR_ERR(resp); | |
1025 | resp = NULL; | |
1026 | goto exit; | |
1027 | } | |
1028 | ||
1029 | sdd_req = resp->data; | |
1030 | ||
1031 | if (resp->len < 2 || sdd_req[0] != DIGITAL_CMD_SEL_REQ_CL1 || | |
1032 | sdd_req[1] != DIGITAL_SDD_REQ_SEL_PAR) { | |
1033 | rc = -EINVAL; | |
1034 | goto exit; | |
1035 | } | |
1036 | ||
1037 | rc = digital_tg_send_sdd_res(ddev); | |
1038 | ||
1039 | exit: | |
1040 | if (rc) | |
1041 | digital_poll_next_tech(ddev); | |
1042 | ||
1043 | dev_kfree_skb(resp); | |
1044 | } | |
1045 | ||
1046 | static int digital_tg_send_sens_res(struct nfc_digital_dev *ddev) | |
1047 | { | |
1048 | struct sk_buff *skb; | |
1049 | u8 *sens_res; | |
1050 | int rc; | |
1051 | ||
1052 | skb = digital_skb_alloc(ddev, 2); | |
1053 | if (!skb) | |
1054 | return -ENOMEM; | |
1055 | ||
1056 | sens_res = skb_put(skb, 2); | |
1057 | ||
1058 | sens_res[0] = (DIGITAL_SENS_RES_NFC_DEP >> 8) & 0xFF; | |
1059 | sens_res[1] = DIGITAL_SENS_RES_NFC_DEP & 0xFF; | |
1060 | ||
55537c7e MG |
1061 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
1062 | NFC_DIGITAL_FRAMING_NFCA_STANDARD); | |
1063 | if (rc) { | |
1064 | kfree_skb(skb); | |
1065 | return rc; | |
1066 | } | |
1067 | ||
1c7a4c24 TE |
1068 | rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_sdd_req, |
1069 | NULL); | |
1070 | if (rc) | |
1071 | kfree_skb(skb); | |
1072 | ||
1073 | return rc; | |
1074 | } | |
1075 | ||
1076 | void digital_tg_recv_sens_req(struct nfc_digital_dev *ddev, void *arg, | |
1077 | struct sk_buff *resp) | |
1078 | { | |
1079 | u8 sens_req; | |
1080 | int rc; | |
1081 | ||
1082 | if (IS_ERR(resp)) { | |
1083 | rc = PTR_ERR(resp); | |
1084 | resp = NULL; | |
1085 | goto exit; | |
1086 | } | |
1087 | ||
1088 | sens_req = resp->data[0]; | |
1089 | ||
1090 | if (!resp->len || (sens_req != DIGITAL_CMD_SENS_REQ && | |
1091 | sens_req != DIGITAL_CMD_ALL_REQ)) { | |
1092 | rc = -EINVAL; | |
1093 | goto exit; | |
1094 | } | |
1095 | ||
1096 | rc = digital_tg_send_sens_res(ddev); | |
1097 | ||
1098 | exit: | |
1099 | if (rc) | |
1100 | digital_poll_next_tech(ddev); | |
1101 | ||
1102 | dev_kfree_skb(resp); | |
1103 | } | |
1104 | ||
4b8b6267 MG |
1105 | static void digital_tg_recv_atr_or_sensf_req(struct nfc_digital_dev *ddev, |
1106 | void *arg, struct sk_buff *resp) | |
1107 | { | |
1108 | if (!IS_ERR(resp) && (resp->len >= 2) && | |
1109 | (resp->data[1] == DIGITAL_CMD_SENSF_REQ)) | |
1110 | digital_tg_recv_sensf_req(ddev, arg, resp); | |
1111 | else | |
1112 | digital_tg_recv_atr_req(ddev, arg, resp); | |
1113 | ||
1114 | return; | |
1115 | } | |
1116 | ||
180106bd | 1117 | static int digital_tg_send_sensf_res(struct nfc_digital_dev *ddev, |
1c7a4c24 TE |
1118 | struct digital_sensf_req *sensf_req) |
1119 | { | |
1120 | struct sk_buff *skb; | |
1121 | u8 size; | |
1122 | int rc; | |
1123 | struct digital_sensf_res *sensf_res; | |
1124 | ||
1125 | size = sizeof(struct digital_sensf_res); | |
1126 | ||
96e829b4 | 1127 | if (sensf_req->rc == DIGITAL_SENSF_REQ_RC_NONE) |
1c7a4c24 TE |
1128 | size -= sizeof(sensf_res->rd); |
1129 | ||
1130 | skb = digital_skb_alloc(ddev, size); | |
1131 | if (!skb) | |
1132 | return -ENOMEM; | |
1133 | ||
1134 | skb_put(skb, size); | |
1135 | ||
1136 | sensf_res = (struct digital_sensf_res *)skb->data; | |
1137 | ||
1138 | memset(sensf_res, 0, size); | |
1139 | ||
1140 | sensf_res->cmd = DIGITAL_CMD_SENSF_RES; | |
1141 | sensf_res->nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1; | |
1142 | sensf_res->nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2; | |
1143 | get_random_bytes(&sensf_res->nfcid2[2], 6); | |
1144 | ||
1145 | switch (sensf_req->rc) { | |
1146 | case DIGITAL_SENSF_REQ_RC_SC: | |
1147 | sensf_res->rd[0] = sensf_req->sc1; | |
1148 | sensf_res->rd[1] = sensf_req->sc2; | |
1149 | break; | |
1150 | case DIGITAL_SENSF_REQ_RC_AP: | |
1151 | sensf_res->rd[0] = DIGITAL_SENSF_RES_RD_AP_B1; | |
1152 | sensf_res->rd[1] = DIGITAL_SENSF_RES_RD_AP_B2; | |
1153 | break; | |
1154 | } | |
1155 | ||
d58ff351 | 1156 | *(u8 *)skb_push(skb, sizeof(u8)) = size + 1; |
1c7a4c24 TE |
1157 | |
1158 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) | |
1159 | digital_skb_add_crc_f(skb); | |
1160 | ||
1161 | rc = digital_tg_send_cmd(ddev, skb, 300, | |
4b8b6267 | 1162 | digital_tg_recv_atr_or_sensf_req, NULL); |
1c7a4c24 TE |
1163 | if (rc) |
1164 | kfree_skb(skb); | |
1165 | ||
1166 | return rc; | |
1167 | } | |
1168 | ||
1169 | void digital_tg_recv_sensf_req(struct nfc_digital_dev *ddev, void *arg, | |
1170 | struct sk_buff *resp) | |
1171 | { | |
1172 | struct digital_sensf_req *sensf_req; | |
1173 | int rc; | |
1174 | ||
1175 | if (IS_ERR(resp)) { | |
1176 | rc = PTR_ERR(resp); | |
1177 | resp = NULL; | |
1178 | goto exit; | |
1179 | } | |
1180 | ||
1181 | if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) { | |
1182 | rc = digital_skb_check_crc_f(resp); | |
1183 | if (rc) { | |
1184 | PROTOCOL_ERR("6.4.1.8"); | |
1185 | goto exit; | |
1186 | } | |
1187 | } | |
1188 | ||
1189 | if (resp->len != sizeof(struct digital_sensf_req) + 1) { | |
1190 | rc = -EINVAL; | |
1191 | goto exit; | |
1192 | } | |
1193 | ||
1194 | skb_pull(resp, 1); | |
1195 | sensf_req = (struct digital_sensf_req *)resp->data; | |
1196 | ||
1197 | if (sensf_req->cmd != DIGITAL_CMD_SENSF_REQ) { | |
1198 | rc = -EINVAL; | |
1199 | goto exit; | |
1200 | } | |
1201 | ||
1202 | rc = digital_tg_send_sensf_res(ddev, sensf_req); | |
1203 | ||
1204 | exit: | |
1205 | if (rc) | |
1206 | digital_poll_next_tech(ddev); | |
1207 | ||
1208 | dev_kfree_skb(resp); | |
1209 | } | |
1210 | ||
bf30a67c | 1211 | static int digital_tg_config_nfca(struct nfc_digital_dev *ddev) |
1c7a4c24 TE |
1212 | { |
1213 | int rc; | |
1214 | ||
bf30a67c MG |
1215 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, |
1216 | NFC_DIGITAL_RF_TECH_106A); | |
1c7a4c24 TE |
1217 | if (rc) |
1218 | return rc; | |
1219 | ||
bf30a67c MG |
1220 | return digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
1221 | NFC_DIGITAL_FRAMING_NFCA_NFC_DEP); | |
1222 | } | |
1223 | ||
1224 | int digital_tg_listen_nfca(struct nfc_digital_dev *ddev, u8 rf_tech) | |
1225 | { | |
1226 | int rc; | |
1227 | ||
1228 | rc = digital_tg_config_nfca(ddev); | |
1c7a4c24 TE |
1229 | if (rc) |
1230 | return rc; | |
1231 | ||
1232 | return digital_tg_listen(ddev, 300, digital_tg_recv_sens_req, NULL); | |
1233 | } | |
1234 | ||
bf30a67c | 1235 | static int digital_tg_config_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech) |
1c7a4c24 TE |
1236 | { |
1237 | int rc; | |
1c7a4c24 TE |
1238 | |
1239 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech); | |
1240 | if (rc) | |
1241 | return rc; | |
1242 | ||
bf30a67c MG |
1243 | return digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, |
1244 | NFC_DIGITAL_FRAMING_NFCF_NFC_DEP); | |
1245 | } | |
1246 | ||
1247 | int digital_tg_listen_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech) | |
1248 | { | |
1249 | int rc; | |
bf30a67c MG |
1250 | |
1251 | rc = digital_tg_config_nfcf(ddev, rf_tech); | |
1c7a4c24 TE |
1252 | if (rc) |
1253 | return rc; | |
1254 | ||
b7769344 | 1255 | return digital_tg_listen(ddev, 300, digital_tg_recv_sensf_req, NULL); |
1c7a4c24 | 1256 | } |
bf30a67c MG |
1257 | |
1258 | void digital_tg_recv_md_req(struct nfc_digital_dev *ddev, void *arg, | |
1259 | struct sk_buff *resp) | |
1260 | { | |
1261 | u8 rf_tech; | |
1262 | int rc; | |
1263 | ||
1264 | if (IS_ERR(resp)) { | |
1265 | resp = NULL; | |
1266 | goto exit_free_skb; | |
1267 | } | |
1268 | ||
1269 | rc = ddev->ops->tg_get_rf_tech(ddev, &rf_tech); | |
1270 | if (rc) | |
1271 | goto exit_free_skb; | |
1272 | ||
1273 | switch (rf_tech) { | |
1274 | case NFC_DIGITAL_RF_TECH_106A: | |
1275 | rc = digital_tg_config_nfca(ddev); | |
1276 | if (rc) | |
1277 | goto exit_free_skb; | |
1278 | digital_tg_recv_sens_req(ddev, arg, resp); | |
1279 | break; | |
1280 | case NFC_DIGITAL_RF_TECH_212F: | |
1281 | case NFC_DIGITAL_RF_TECH_424F: | |
1282 | rc = digital_tg_config_nfcf(ddev, rf_tech); | |
1283 | if (rc) | |
1284 | goto exit_free_skb; | |
1285 | digital_tg_recv_sensf_req(ddev, arg, resp); | |
1286 | break; | |
1287 | default: | |
1288 | goto exit_free_skb; | |
1289 | } | |
1290 | ||
1291 | return; | |
1292 | ||
1293 | exit_free_skb: | |
1294 | digital_poll_next_tech(ddev); | |
1295 | dev_kfree_skb(resp); | |
1296 | } |