Commit | Line | Data |
---|---|---|
7d0911c0 TE |
1 | /* |
2 | * NFC Digital Protocol stack | |
3 | * Copyright (c) 2013, Intel Corporation. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | */ | |
15 | ||
c5da0e4a SO |
16 | #define pr_fmt(fmt) "digital: %s: " fmt, __func__ |
17 | ||
7d0911c0 TE |
18 | #include "digital.h" |
19 | ||
20 | #define DIGITAL_NFC_DEP_FRAME_DIR_OUT 0xD4 | |
21 | #define DIGITAL_NFC_DEP_FRAME_DIR_IN 0xD5 | |
22 | ||
23 | #define DIGITAL_NFC_DEP_NFCA_SOD_SB 0xF0 | |
24 | ||
25 | #define DIGITAL_CMD_ATR_REQ 0x00 | |
26 | #define DIGITAL_CMD_ATR_RES 0x01 | |
27 | #define DIGITAL_CMD_PSL_REQ 0x04 | |
28 | #define DIGITAL_CMD_PSL_RES 0x05 | |
29 | #define DIGITAL_CMD_DEP_REQ 0x06 | |
30 | #define DIGITAL_CMD_DEP_RES 0x07 | |
31 | ||
32 | #define DIGITAL_ATR_REQ_MIN_SIZE 16 | |
33 | #define DIGITAL_ATR_REQ_MAX_SIZE 64 | |
34 | ||
7d0911c0 TE |
35 | #define DIGITAL_LR_BITS_PAYLOAD_SIZE_254B 0x30 |
36 | #define DIGITAL_GB_BIT 0x02 | |
37 | ||
38 | #define DIGITAL_NFC_DEP_PFB_TYPE(pfb) ((pfb) & 0xE0) | |
39 | ||
40 | #define DIGITAL_NFC_DEP_PFB_TIMEOUT_BIT 0x10 | |
41 | ||
42 | #define DIGITAL_NFC_DEP_PFB_IS_TIMEOUT(pfb) \ | |
43 | ((pfb) & DIGITAL_NFC_DEP_PFB_TIMEOUT_BIT) | |
44 | #define DIGITAL_NFC_DEP_MI_BIT_SET(pfb) ((pfb) & 0x10) | |
45 | #define DIGITAL_NFC_DEP_NAD_BIT_SET(pfb) ((pfb) & 0x08) | |
46 | #define DIGITAL_NFC_DEP_DID_BIT_SET(pfb) ((pfb) & 0x04) | |
47 | #define DIGITAL_NFC_DEP_PFB_PNI(pfb) ((pfb) & 0x03) | |
48 | ||
49 | #define DIGITAL_NFC_DEP_PFB_I_PDU 0x00 | |
50 | #define DIGITAL_NFC_DEP_PFB_ACK_NACK_PDU 0x40 | |
51 | #define DIGITAL_NFC_DEP_PFB_SUPERVISOR_PDU 0x80 | |
52 | ||
53 | struct digital_atr_req { | |
54 | u8 dir; | |
55 | u8 cmd; | |
56 | u8 nfcid3[10]; | |
57 | u8 did; | |
58 | u8 bs; | |
59 | u8 br; | |
60 | u8 pp; | |
61 | u8 gb[0]; | |
62 | } __packed; | |
63 | ||
64 | struct digital_atr_res { | |
65 | u8 dir; | |
66 | u8 cmd; | |
67 | u8 nfcid3[10]; | |
68 | u8 did; | |
69 | u8 bs; | |
70 | u8 br; | |
71 | u8 to; | |
72 | u8 pp; | |
73 | u8 gb[0]; | |
74 | } __packed; | |
75 | ||
76 | struct digital_psl_req { | |
77 | u8 dir; | |
78 | u8 cmd; | |
79 | u8 did; | |
80 | u8 brs; | |
81 | u8 fsl; | |
82 | } __packed; | |
83 | ||
84 | struct digital_psl_res { | |
85 | u8 dir; | |
86 | u8 cmd; | |
87 | u8 did; | |
88 | } __packed; | |
89 | ||
90 | struct digital_dep_req_res { | |
91 | u8 dir; | |
92 | u8 cmd; | |
93 | u8 pfb; | |
94 | } __packed; | |
95 | ||
96 | static void digital_in_recv_dep_res(struct nfc_digital_dev *ddev, void *arg, | |
97 | struct sk_buff *resp); | |
98 | ||
99 | static void digital_skb_push_dep_sod(struct nfc_digital_dev *ddev, | |
100 | struct sk_buff *skb) | |
101 | { | |
102 | skb_push(skb, sizeof(u8)); | |
103 | ||
104 | skb->data[0] = skb->len; | |
105 | ||
106 | if (ddev->curr_rf_tech == NFC_DIGITAL_RF_TECH_106A) | |
107 | *skb_push(skb, sizeof(u8)) = DIGITAL_NFC_DEP_NFCA_SOD_SB; | |
108 | } | |
109 | ||
110 | static int digital_skb_pull_dep_sod(struct nfc_digital_dev *ddev, | |
111 | struct sk_buff *skb) | |
112 | { | |
113 | u8 size; | |
114 | ||
115 | if (skb->len < 2) | |
116 | return -EIO; | |
117 | ||
118 | if (ddev->curr_rf_tech == NFC_DIGITAL_RF_TECH_106A) | |
119 | skb_pull(skb, sizeof(u8)); | |
120 | ||
121 | size = skb->data[0]; | |
122 | if (size != skb->len) | |
123 | return -EIO; | |
124 | ||
125 | skb_pull(skb, sizeof(u8)); | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | static void digital_in_recv_atr_res(struct nfc_digital_dev *ddev, void *arg, | |
131 | struct sk_buff *resp) | |
132 | { | |
133 | struct nfc_target *target = arg; | |
134 | struct digital_atr_res *atr_res; | |
135 | u8 gb_len; | |
136 | int rc; | |
137 | ||
138 | if (IS_ERR(resp)) { | |
139 | rc = PTR_ERR(resp); | |
140 | resp = NULL; | |
141 | goto exit; | |
142 | } | |
143 | ||
144 | rc = ddev->skb_check_crc(resp); | |
145 | if (rc) { | |
146 | PROTOCOL_ERR("14.4.1.6"); | |
147 | goto exit; | |
148 | } | |
149 | ||
150 | rc = digital_skb_pull_dep_sod(ddev, resp); | |
151 | if (rc) { | |
152 | PROTOCOL_ERR("14.4.1.2"); | |
153 | goto exit; | |
154 | } | |
155 | ||
156 | if (resp->len < sizeof(struct digital_atr_res)) { | |
157 | rc = -EIO; | |
158 | goto exit; | |
159 | } | |
160 | ||
161 | gb_len = resp->len - sizeof(struct digital_atr_res); | |
162 | ||
163 | atr_res = (struct digital_atr_res *)resp->data; | |
164 | ||
165 | rc = nfc_set_remote_general_bytes(ddev->nfc_dev, atr_res->gb, gb_len); | |
166 | if (rc) | |
167 | goto exit; | |
168 | ||
169 | rc = nfc_dep_link_is_up(ddev->nfc_dev, target->idx, NFC_COMM_ACTIVE, | |
170 | NFC_RF_INITIATOR); | |
171 | ||
172 | ddev->curr_nfc_dep_pni = 0; | |
173 | ||
174 | exit: | |
175 | dev_kfree_skb(resp); | |
176 | ||
177 | if (rc) | |
178 | ddev->curr_protocol = 0; | |
179 | } | |
180 | ||
181 | int digital_in_send_atr_req(struct nfc_digital_dev *ddev, | |
182 | struct nfc_target *target, __u8 comm_mode, __u8 *gb, | |
183 | size_t gb_len) | |
184 | { | |
185 | struct sk_buff *skb; | |
186 | struct digital_atr_req *atr_req; | |
187 | uint size; | |
188 | ||
189 | size = DIGITAL_ATR_REQ_MIN_SIZE + gb_len; | |
190 | ||
191 | if (size > DIGITAL_ATR_REQ_MAX_SIZE) { | |
192 | PROTOCOL_ERR("14.6.1.1"); | |
193 | return -EINVAL; | |
194 | } | |
195 | ||
196 | skb = digital_skb_alloc(ddev, size); | |
197 | if (!skb) | |
198 | return -ENOMEM; | |
199 | ||
200 | skb_put(skb, sizeof(struct digital_atr_req)); | |
201 | ||
202 | atr_req = (struct digital_atr_req *)skb->data; | |
203 | memset(atr_req, 0, sizeof(struct digital_atr_req)); | |
204 | ||
205 | atr_req->dir = DIGITAL_NFC_DEP_FRAME_DIR_OUT; | |
206 | atr_req->cmd = DIGITAL_CMD_ATR_REQ; | |
207 | if (target->nfcid2_len) | |
4f319e32 | 208 | memcpy(atr_req->nfcid3, target->nfcid2, NFC_NFCID2_MAXSIZE); |
7d0911c0 | 209 | else |
4f319e32 | 210 | get_random_bytes(atr_req->nfcid3, NFC_NFCID3_MAXSIZE); |
7d0911c0 TE |
211 | |
212 | atr_req->did = 0; | |
213 | atr_req->bs = 0; | |
214 | atr_req->br = 0; | |
215 | ||
216 | atr_req->pp = DIGITAL_LR_BITS_PAYLOAD_SIZE_254B; | |
217 | ||
218 | if (gb_len) { | |
219 | atr_req->pp |= DIGITAL_GB_BIT; | |
220 | memcpy(skb_put(skb, gb_len), gb, gb_len); | |
221 | } | |
222 | ||
223 | digital_skb_push_dep_sod(ddev, skb); | |
224 | ||
225 | ddev->skb_add_crc(skb); | |
226 | ||
00e625df TE |
227 | return digital_in_send_cmd(ddev, skb, 500, digital_in_recv_atr_res, |
228 | target); | |
7d0911c0 TE |
229 | } |
230 | ||
231 | static int digital_in_send_rtox(struct nfc_digital_dev *ddev, | |
232 | struct digital_data_exch *data_exch, u8 rtox) | |
233 | { | |
234 | struct digital_dep_req_res *dep_req; | |
235 | struct sk_buff *skb; | |
236 | int rc; | |
237 | ||
238 | skb = digital_skb_alloc(ddev, 1); | |
239 | if (!skb) | |
240 | return -ENOMEM; | |
241 | ||
242 | *skb_put(skb, 1) = rtox; | |
243 | ||
244 | skb_push(skb, sizeof(struct digital_dep_req_res)); | |
245 | ||
246 | dep_req = (struct digital_dep_req_res *)skb->data; | |
247 | ||
248 | dep_req->dir = DIGITAL_NFC_DEP_FRAME_DIR_OUT; | |
249 | dep_req->cmd = DIGITAL_CMD_DEP_REQ; | |
250 | dep_req->pfb = DIGITAL_NFC_DEP_PFB_SUPERVISOR_PDU | | |
251 | DIGITAL_NFC_DEP_PFB_TIMEOUT_BIT; | |
252 | ||
253 | digital_skb_push_dep_sod(ddev, skb); | |
254 | ||
255 | ddev->skb_add_crc(skb); | |
256 | ||
257 | rc = digital_in_send_cmd(ddev, skb, 1500, digital_in_recv_dep_res, | |
258 | data_exch); | |
259 | ||
260 | return rc; | |
261 | } | |
262 | ||
263 | static void digital_in_recv_dep_res(struct nfc_digital_dev *ddev, void *arg, | |
264 | struct sk_buff *resp) | |
265 | { | |
266 | struct digital_data_exch *data_exch = arg; | |
267 | struct digital_dep_req_res *dep_res; | |
268 | u8 pfb; | |
269 | uint size; | |
270 | int rc; | |
271 | ||
272 | if (IS_ERR(resp)) { | |
273 | rc = PTR_ERR(resp); | |
274 | resp = NULL; | |
275 | goto exit; | |
276 | } | |
277 | ||
278 | rc = ddev->skb_check_crc(resp); | |
279 | if (rc) { | |
280 | PROTOCOL_ERR("14.4.1.6"); | |
281 | goto error; | |
282 | } | |
283 | ||
284 | rc = digital_skb_pull_dep_sod(ddev, resp); | |
285 | if (rc) { | |
286 | PROTOCOL_ERR("14.4.1.2"); | |
287 | goto exit; | |
288 | } | |
289 | ||
290 | dep_res = (struct digital_dep_req_res *)resp->data; | |
291 | ||
292 | if (resp->len < sizeof(struct digital_dep_req_res) || | |
293 | dep_res->dir != DIGITAL_NFC_DEP_FRAME_DIR_IN || | |
294 | dep_res->cmd != DIGITAL_CMD_DEP_RES) { | |
295 | rc = -EIO; | |
296 | goto error; | |
297 | } | |
298 | ||
299 | pfb = dep_res->pfb; | |
300 | ||
301 | switch (DIGITAL_NFC_DEP_PFB_TYPE(pfb)) { | |
302 | case DIGITAL_NFC_DEP_PFB_I_PDU: | |
303 | if (DIGITAL_NFC_DEP_PFB_PNI(pfb) != ddev->curr_nfc_dep_pni) { | |
304 | PROTOCOL_ERR("14.12.3.3"); | |
305 | rc = -EIO; | |
306 | goto error; | |
307 | } | |
308 | ||
309 | ddev->curr_nfc_dep_pni = | |
310 | DIGITAL_NFC_DEP_PFB_PNI(ddev->curr_nfc_dep_pni + 1); | |
311 | rc = 0; | |
312 | break; | |
313 | ||
314 | case DIGITAL_NFC_DEP_PFB_ACK_NACK_PDU: | |
26042530 | 315 | pr_err("Received a ACK/NACK PDU\n"); |
7d0911c0 TE |
316 | rc = -EIO; |
317 | goto error; | |
318 | ||
319 | case DIGITAL_NFC_DEP_PFB_SUPERVISOR_PDU: | |
320 | if (!DIGITAL_NFC_DEP_PFB_IS_TIMEOUT(pfb)) { | |
321 | rc = -EINVAL; | |
322 | goto error; | |
323 | } | |
324 | ||
325 | rc = digital_in_send_rtox(ddev, data_exch, resp->data[3]); | |
326 | if (rc) | |
327 | goto error; | |
328 | ||
329 | kfree_skb(resp); | |
330 | return; | |
331 | } | |
332 | ||
333 | if (DIGITAL_NFC_DEP_MI_BIT_SET(pfb)) { | |
26042530 | 334 | pr_err("MI bit set. Chained PDU not supported\n"); |
7d0911c0 TE |
335 | rc = -EIO; |
336 | goto error; | |
337 | } | |
338 | ||
339 | size = sizeof(struct digital_dep_req_res); | |
340 | ||
341 | if (DIGITAL_NFC_DEP_DID_BIT_SET(pfb)) | |
342 | size++; | |
343 | ||
344 | if (size > resp->len) { | |
345 | rc = -EIO; | |
346 | goto error; | |
347 | } | |
348 | ||
349 | skb_pull(resp, size); | |
350 | ||
351 | exit: | |
352 | data_exch->cb(data_exch->cb_context, resp, rc); | |
353 | ||
354 | error: | |
355 | kfree(data_exch); | |
356 | ||
357 | if (rc) | |
358 | kfree_skb(resp); | |
359 | } | |
360 | ||
361 | int digital_in_send_dep_req(struct nfc_digital_dev *ddev, | |
362 | struct nfc_target *target, struct sk_buff *skb, | |
363 | struct digital_data_exch *data_exch) | |
364 | { | |
365 | struct digital_dep_req_res *dep_req; | |
366 | ||
367 | skb_push(skb, sizeof(struct digital_dep_req_res)); | |
368 | ||
369 | dep_req = (struct digital_dep_req_res *)skb->data; | |
370 | dep_req->dir = DIGITAL_NFC_DEP_FRAME_DIR_OUT; | |
371 | dep_req->cmd = DIGITAL_CMD_DEP_REQ; | |
372 | dep_req->pfb = ddev->curr_nfc_dep_pni; | |
373 | ||
374 | digital_skb_push_dep_sod(ddev, skb); | |
375 | ||
376 | ddev->skb_add_crc(skb); | |
377 | ||
378 | return digital_in_send_cmd(ddev, skb, 1500, digital_in_recv_dep_res, | |
379 | data_exch); | |
380 | } | |
1c7a4c24 | 381 | |
b711ad52 TE |
382 | static void digital_tg_set_rf_tech(struct nfc_digital_dev *ddev, u8 rf_tech) |
383 | { | |
384 | ddev->curr_rf_tech = rf_tech; | |
385 | ||
386 | ddev->skb_add_crc = digital_skb_add_crc_none; | |
387 | ddev->skb_check_crc = digital_skb_check_crc_none; | |
388 | ||
389 | if (DIGITAL_DRV_CAPS_TG_CRC(ddev)) | |
390 | return; | |
391 | ||
392 | switch (ddev->curr_rf_tech) { | |
393 | case NFC_DIGITAL_RF_TECH_106A: | |
394 | ddev->skb_add_crc = digital_skb_add_crc_a; | |
395 | ddev->skb_check_crc = digital_skb_check_crc_a; | |
396 | break; | |
397 | ||
398 | case NFC_DIGITAL_RF_TECH_212F: | |
399 | case NFC_DIGITAL_RF_TECH_424F: | |
400 | ddev->skb_add_crc = digital_skb_add_crc_f; | |
401 | ddev->skb_check_crc = digital_skb_check_crc_f; | |
402 | break; | |
403 | ||
404 | default: | |
405 | break; | |
406 | } | |
407 | } | |
408 | ||
1c7a4c24 TE |
409 | static void digital_tg_recv_dep_req(struct nfc_digital_dev *ddev, void *arg, |
410 | struct sk_buff *resp) | |
411 | { | |
412 | int rc; | |
413 | struct digital_dep_req_res *dep_req; | |
414 | size_t size; | |
415 | ||
416 | if (IS_ERR(resp)) { | |
417 | rc = PTR_ERR(resp); | |
418 | resp = NULL; | |
419 | goto exit; | |
420 | } | |
421 | ||
422 | rc = ddev->skb_check_crc(resp); | |
423 | if (rc) { | |
424 | PROTOCOL_ERR("14.4.1.6"); | |
425 | goto exit; | |
426 | } | |
427 | ||
428 | rc = digital_skb_pull_dep_sod(ddev, resp); | |
429 | if (rc) { | |
430 | PROTOCOL_ERR("14.4.1.2"); | |
431 | goto exit; | |
432 | } | |
433 | ||
434 | size = sizeof(struct digital_dep_req_res); | |
435 | dep_req = (struct digital_dep_req_res *)resp->data; | |
436 | ||
437 | if (resp->len < size || dep_req->dir != DIGITAL_NFC_DEP_FRAME_DIR_OUT || | |
438 | dep_req->cmd != DIGITAL_CMD_DEP_REQ) { | |
439 | rc = -EIO; | |
440 | goto exit; | |
441 | } | |
442 | ||
443 | if (DIGITAL_NFC_DEP_DID_BIT_SET(dep_req->pfb)) | |
444 | size++; | |
445 | ||
446 | if (resp->len < size) { | |
447 | rc = -EIO; | |
448 | goto exit; | |
449 | } | |
450 | ||
451 | switch (DIGITAL_NFC_DEP_PFB_TYPE(dep_req->pfb)) { | |
452 | case DIGITAL_NFC_DEP_PFB_I_PDU: | |
26042530 | 453 | pr_debug("DIGITAL_NFC_DEP_PFB_I_PDU\n"); |
1c7a4c24 TE |
454 | ddev->curr_nfc_dep_pni = DIGITAL_NFC_DEP_PFB_PNI(dep_req->pfb); |
455 | break; | |
456 | case DIGITAL_NFC_DEP_PFB_ACK_NACK_PDU: | |
26042530 | 457 | pr_err("Received a ACK/NACK PDU\n"); |
1c7a4c24 TE |
458 | rc = -EINVAL; |
459 | goto exit; | |
460 | break; | |
461 | case DIGITAL_NFC_DEP_PFB_SUPERVISOR_PDU: | |
26042530 | 462 | pr_err("Received a SUPERVISOR PDU\n"); |
1c7a4c24 TE |
463 | rc = -EINVAL; |
464 | goto exit; | |
465 | break; | |
466 | } | |
467 | ||
468 | skb_pull(resp, size); | |
469 | ||
470 | rc = nfc_tm_data_received(ddev->nfc_dev, resp); | |
471 | ||
472 | exit: | |
473 | if (rc) | |
474 | kfree_skb(resp); | |
475 | } | |
476 | ||
477 | int digital_tg_send_dep_res(struct nfc_digital_dev *ddev, struct sk_buff *skb) | |
478 | { | |
479 | struct digital_dep_req_res *dep_res; | |
480 | ||
481 | skb_push(skb, sizeof(struct digital_dep_req_res)); | |
482 | dep_res = (struct digital_dep_req_res *)skb->data; | |
483 | ||
484 | dep_res->dir = DIGITAL_NFC_DEP_FRAME_DIR_IN; | |
485 | dep_res->cmd = DIGITAL_CMD_DEP_RES; | |
486 | dep_res->pfb = ddev->curr_nfc_dep_pni; | |
487 | ||
488 | digital_skb_push_dep_sod(ddev, skb); | |
489 | ||
490 | ddev->skb_add_crc(skb); | |
491 | ||
492 | return digital_tg_send_cmd(ddev, skb, 1500, digital_tg_recv_dep_req, | |
493 | NULL); | |
494 | } | |
495 | ||
496 | static void digital_tg_send_psl_res_complete(struct nfc_digital_dev *ddev, | |
497 | void *arg, struct sk_buff *resp) | |
498 | { | |
67af1d7a | 499 | u8 rf_tech = (unsigned long)arg; |
1c7a4c24 TE |
500 | |
501 | if (IS_ERR(resp)) | |
502 | return; | |
503 | ||
b711ad52 TE |
504 | digital_tg_set_rf_tech(ddev, rf_tech); |
505 | ||
1c7a4c24 TE |
506 | digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech); |
507 | ||
508 | digital_tg_listen(ddev, 1500, digital_tg_recv_dep_req, NULL); | |
509 | ||
510 | dev_kfree_skb(resp); | |
511 | } | |
512 | ||
513 | static int digital_tg_send_psl_res(struct nfc_digital_dev *ddev, u8 did, | |
514 | u8 rf_tech) | |
515 | { | |
516 | struct digital_psl_res *psl_res; | |
517 | struct sk_buff *skb; | |
518 | int rc; | |
519 | ||
520 | skb = digital_skb_alloc(ddev, sizeof(struct digital_psl_res)); | |
521 | if (!skb) | |
522 | return -ENOMEM; | |
523 | ||
524 | skb_put(skb, sizeof(struct digital_psl_res)); | |
525 | ||
526 | psl_res = (struct digital_psl_res *)skb->data; | |
527 | ||
528 | psl_res->dir = DIGITAL_NFC_DEP_FRAME_DIR_IN; | |
529 | psl_res->cmd = DIGITAL_CMD_PSL_RES; | |
530 | psl_res->did = did; | |
531 | ||
532 | digital_skb_push_dep_sod(ddev, skb); | |
533 | ||
534 | ddev->skb_add_crc(skb); | |
535 | ||
536 | rc = digital_tg_send_cmd(ddev, skb, 0, digital_tg_send_psl_res_complete, | |
67af1d7a | 537 | (void *)(unsigned long)rf_tech); |
1c7a4c24 TE |
538 | |
539 | if (rc) | |
540 | kfree_skb(skb); | |
541 | ||
542 | return rc; | |
543 | } | |
544 | ||
545 | static void digital_tg_recv_psl_req(struct nfc_digital_dev *ddev, void *arg, | |
546 | struct sk_buff *resp) | |
547 | { | |
548 | int rc; | |
549 | struct digital_psl_req *psl_req; | |
550 | u8 rf_tech; | |
551 | u8 dsi; | |
552 | ||
553 | if (IS_ERR(resp)) { | |
554 | rc = PTR_ERR(resp); | |
555 | resp = NULL; | |
556 | goto exit; | |
557 | } | |
558 | ||
559 | rc = ddev->skb_check_crc(resp); | |
560 | if (rc) { | |
561 | PROTOCOL_ERR("14.4.1.6"); | |
562 | goto exit; | |
563 | } | |
564 | ||
565 | rc = digital_skb_pull_dep_sod(ddev, resp); | |
566 | if (rc) { | |
567 | PROTOCOL_ERR("14.4.1.2"); | |
568 | goto exit; | |
569 | } | |
570 | ||
571 | psl_req = (struct digital_psl_req *)resp->data; | |
572 | ||
573 | if (resp->len != sizeof(struct digital_psl_req) || | |
574 | psl_req->dir != DIGITAL_NFC_DEP_FRAME_DIR_OUT || | |
575 | psl_req->cmd != DIGITAL_CMD_PSL_REQ) { | |
576 | rc = -EIO; | |
577 | goto exit; | |
578 | } | |
579 | ||
580 | dsi = (psl_req->brs >> 3) & 0x07; | |
581 | switch (dsi) { | |
582 | case 0: | |
583 | rf_tech = NFC_DIGITAL_RF_TECH_106A; | |
584 | break; | |
585 | case 1: | |
586 | rf_tech = NFC_DIGITAL_RF_TECH_212F; | |
587 | break; | |
588 | case 2: | |
589 | rf_tech = NFC_DIGITAL_RF_TECH_424F; | |
590 | break; | |
591 | default: | |
77d84ff8 | 592 | pr_err("Unsupported dsi value %d\n", dsi); |
1c7a4c24 TE |
593 | goto exit; |
594 | } | |
595 | ||
596 | rc = digital_tg_send_psl_res(ddev, psl_req->did, rf_tech); | |
597 | ||
598 | exit: | |
599 | kfree_skb(resp); | |
600 | } | |
601 | ||
602 | static void digital_tg_send_atr_res_complete(struct nfc_digital_dev *ddev, | |
603 | void *arg, struct sk_buff *resp) | |
604 | { | |
605 | int offset; | |
606 | ||
607 | if (IS_ERR(resp)) { | |
608 | digital_poll_next_tech(ddev); | |
609 | return; | |
610 | } | |
611 | ||
612 | offset = 2; | |
613 | if (resp->data[0] == DIGITAL_NFC_DEP_NFCA_SOD_SB) | |
614 | offset++; | |
615 | ||
616 | if (resp->data[offset] == DIGITAL_CMD_PSL_REQ) | |
617 | digital_tg_recv_psl_req(ddev, arg, resp); | |
618 | else | |
619 | digital_tg_recv_dep_req(ddev, arg, resp); | |
620 | } | |
621 | ||
622 | static int digital_tg_send_atr_res(struct nfc_digital_dev *ddev, | |
623 | struct digital_atr_req *atr_req) | |
624 | { | |
625 | struct digital_atr_res *atr_res; | |
626 | struct sk_buff *skb; | |
627 | u8 *gb; | |
628 | size_t gb_len; | |
629 | int rc; | |
630 | ||
631 | gb = nfc_get_local_general_bytes(ddev->nfc_dev, &gb_len); | |
632 | if (!gb) | |
633 | gb_len = 0; | |
634 | ||
635 | skb = digital_skb_alloc(ddev, sizeof(struct digital_atr_res) + gb_len); | |
636 | if (!skb) | |
637 | return -ENOMEM; | |
638 | ||
639 | skb_put(skb, sizeof(struct digital_atr_res)); | |
640 | atr_res = (struct digital_atr_res *)skb->data; | |
641 | ||
642 | memset(atr_res, 0, sizeof(struct digital_atr_res)); | |
643 | ||
644 | atr_res->dir = DIGITAL_NFC_DEP_FRAME_DIR_IN; | |
645 | atr_res->cmd = DIGITAL_CMD_ATR_RES; | |
646 | memcpy(atr_res->nfcid3, atr_req->nfcid3, sizeof(atr_req->nfcid3)); | |
647 | atr_res->to = 8; | |
648 | atr_res->pp = DIGITAL_LR_BITS_PAYLOAD_SIZE_254B; | |
649 | if (gb_len) { | |
650 | skb_put(skb, gb_len); | |
651 | ||
652 | atr_res->pp |= DIGITAL_GB_BIT; | |
653 | memcpy(atr_res->gb, gb, gb_len); | |
654 | } | |
655 | ||
656 | digital_skb_push_dep_sod(ddev, skb); | |
657 | ||
658 | ddev->skb_add_crc(skb); | |
659 | ||
660 | rc = digital_tg_send_cmd(ddev, skb, 999, | |
661 | digital_tg_send_atr_res_complete, NULL); | |
662 | if (rc) { | |
663 | kfree_skb(skb); | |
664 | return rc; | |
665 | } | |
666 | ||
667 | return rc; | |
668 | } | |
669 | ||
670 | void digital_tg_recv_atr_req(struct nfc_digital_dev *ddev, void *arg, | |
671 | struct sk_buff *resp) | |
672 | { | |
673 | int rc; | |
674 | struct digital_atr_req *atr_req; | |
675 | size_t gb_len, min_size; | |
676 | ||
677 | if (IS_ERR(resp)) { | |
678 | rc = PTR_ERR(resp); | |
679 | resp = NULL; | |
680 | goto exit; | |
681 | } | |
682 | ||
683 | if (!resp->len) { | |
684 | rc = -EIO; | |
685 | goto exit; | |
686 | } | |
687 | ||
688 | if (resp->data[0] == DIGITAL_NFC_DEP_NFCA_SOD_SB) { | |
689 | min_size = DIGITAL_ATR_REQ_MIN_SIZE + 2; | |
b711ad52 | 690 | digital_tg_set_rf_tech(ddev, NFC_DIGITAL_RF_TECH_106A); |
1c7a4c24 TE |
691 | } else { |
692 | min_size = DIGITAL_ATR_REQ_MIN_SIZE + 1; | |
b711ad52 | 693 | digital_tg_set_rf_tech(ddev, NFC_DIGITAL_RF_TECH_212F); |
1c7a4c24 TE |
694 | } |
695 | ||
696 | if (resp->len < min_size) { | |
697 | rc = -EIO; | |
698 | goto exit; | |
699 | } | |
700 | ||
48e10445 | 701 | ddev->curr_protocol = NFC_PROTO_NFC_DEP_MASK; |
1c7a4c24 TE |
702 | |
703 | rc = ddev->skb_check_crc(resp); | |
704 | if (rc) { | |
705 | PROTOCOL_ERR("14.4.1.6"); | |
706 | goto exit; | |
707 | } | |
708 | ||
709 | rc = digital_skb_pull_dep_sod(ddev, resp); | |
710 | if (rc) { | |
711 | PROTOCOL_ERR("14.4.1.2"); | |
712 | goto exit; | |
713 | } | |
714 | ||
715 | atr_req = (struct digital_atr_req *)resp->data; | |
716 | ||
717 | if (atr_req->dir != DIGITAL_NFC_DEP_FRAME_DIR_OUT || | |
718 | atr_req->cmd != DIGITAL_CMD_ATR_REQ) { | |
719 | rc = -EINVAL; | |
720 | goto exit; | |
721 | } | |
722 | ||
723 | rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, | |
724 | NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED); | |
725 | if (rc) | |
726 | goto exit; | |
727 | ||
728 | rc = digital_tg_send_atr_res(ddev, atr_req); | |
729 | if (rc) | |
730 | goto exit; | |
731 | ||
732 | gb_len = resp->len - sizeof(struct digital_atr_req); | |
733 | rc = nfc_tm_activated(ddev->nfc_dev, NFC_PROTO_NFC_DEP_MASK, | |
734 | NFC_COMM_PASSIVE, atr_req->gb, gb_len); | |
735 | if (rc) | |
736 | goto exit; | |
737 | ||
738 | ddev->poll_tech_count = 0; | |
739 | ||
740 | rc = 0; | |
741 | exit: | |
742 | if (rc) | |
743 | digital_poll_next_tech(ddev); | |
744 | ||
745 | dev_kfree_skb(resp); | |
746 | } |